Replace IRC channel with Gitter (#1069)

The Mozilla IRC network is being shutdown, see
https://blog.rust-lang.org/2019/04/26/Mozilla-IRC-Sunset-and-the-Rust-Channel.html
and http://exple.tive.org/blarg/2019/04/26/synchronous-text.

.cirrus.yml

@@ -1,6 +1,9 @@
 freebsd_instance:
   image: freebsd-11-2-release-amd64
 
+env:
+  RUST_BACKTRACE: full
+
 task:
   name: FreeBSD 11.2 amd64
   setup_script:
@@ -13,9 +16,12 @@ task:
     - . $HOME/.cargo/env
     - cargo build
     - cargo build --no-default-features
-  test_script:
+  amd64_test_script:
     - . $HOME/.cargo/env
     - cargo test
-    - cargo test --no-default-features
+  i386_test_script:
+    - . $HOME/.cargo/env
+    - rustup target add i686-unknown-freebsd
+    - cargo test --target i686-unknown-freebsd
   before_cache_script:
     - rm -rf $HOME/.cargo/registry/index

CHANGELOG.md

@@ -1,3 +1,9 @@
+# Unreleased (Unreleased)
+
+* The `join_multicast_v4` and `leave_multicast_v4` methods now take their
+  `Ipv4Addr` arguments by value rather than by reference.
+* Fix lazycell related compilation issues.
+
 # 0.6.19 (May 28, 2018)
 
 ### Fixed

Cargo.toml

@@ -1,18 +1,18 @@
 [package]
-
-name          = "mio"
+edition = "2018"
+name = "mio"
 # When releasing to crates.io:
 # - Update html_root_url.
 # - Update CHANGELOG.md.
 # - Update doc URL.
 # - Create git tag
-version       = "0.6.19"
+version       = "0.7.0"
 license       = "MIT"
 authors       = ["Carl Lerche <me@carllerche.com>"]
 description   = "Lightweight non-blocking IO"
-documentation = "https://docs.rs/mio/0.6.19/mio/"
-homepage      = "https://github.com/carllerche/mio"
-repository    = "https://github.com/carllerche/mio"
+documentation = "https://docs.rs/mio/0.7.0/mio/"
+homepage      = "https://github.com/tokio-rs/mio"
+repository    = "https://github.com/tokio-rs/mio"
 readme        = "README.md"
 keywords      = ["io", "async", "non-blocking"]
 categories    = ["asynchronous"]
@@ -21,34 +21,27 @@ exclude       = [
   ".travis.yml",
   "deploy.sh",
 ]
+publish = false
 
 [features]
-with-deprecated = []
-default = ["with-deprecated"]
 
 [dependencies]
-log      = "0.4"
-slab     = "0.4.0"
-net2     = "0.2.29"
-iovec    = "0.1.1"
-
-[target.'cfg(target_os = "fuchsia")'.dependencies]
-fuchsia-zircon = "0.3.2"
-fuchsia-zircon-sys = "0.3.2"
+log = "0.4.6"
 
 [target.'cfg(unix)'.dependencies]
-libc   = "0.2.42"
+libc = "0.2.58"
 
 [target.'cfg(windows)'.dependencies]
-winapi = "0.2.6"
-miow   = "0.2.1"
-kernel32-sys = "0.2"
+miow   = "0.3.3"
+winapi = { version = "0.3", features = ["winsock2", "mswsock"] }
+ntapi  = "0.3"
+lazy_static = "1.3.0"
 
 [dev-dependencies]
-env_logger = { version = "0.4.0", default-features = false }
-tempdir    = "0.3.4"
-bytes      = "0.3.0"
-
-[[test]]
-name = "test"
-path = "test/mod.rs"
+# Bytes v0.4 still depends on winapi v0.2, but Bytes v0.5 is released yet. So
+# for testing we'll use the git version.
+bytes      = { version = "0.5.0", git = "https://github.com/tokio-rs/bytes", rev = "79e4b2847f27137faaf149d116a352cbeae47fd1" }
+env_logger = { version = "0.6.1", default-features = false }
+slab       = "0.4.2"
+tempdir    = "0.3.7"
+net2       = "0.2.33"

README.md

@@ -14,8 +14,8 @@ overhead as possible over the OS abstractions.
 [mit-url]: LICENSE
 [azure-badge]: https://dev.azure.com/tokio-rs/Tokio/_apis/build/status/tokio-rs.mio?branchName=master
 [azure-url]: https://dev.azure.com/tokio-rs/Tokio/_build/latest?definitionId=2&branchName=master
-[cirrus-badge]: https://api.cirrus-ci.com/github/carllerche/mio.svg
-[cirrus-url]: https://cirrus-ci.com/github/carllerche/mio
+[cirrus-badge]: https://api.cirrus-ci.com/github/tokio-rs/mio.svg
+[cirrus-url]: https://cirrus-ci.com/github/tokio-rs/mio
 
 **API documentation**
 
@@ -42,10 +42,10 @@ extern crate mio;
 
 ## Features
 
-* Non-blocking TCP, UDP.
-* I/O event notification queue backed by epoll, kqueue, and IOCP.
+* Non-blocking TCP, UDP
+* I/O event queue backed by epoll, kqueue, and IOCP
 * Zero allocations at runtime
-* Platform specific extensions.
+* Platform specific extensions
 
 ## Non-goals
 
@@ -60,22 +60,27 @@ or higher-level libraries.
 
 Currently supported platforms:
 
-* Linux
-* OS X
-* Windows
-* FreeBSD
-* NetBSD
-* Solaris
 * Android
+* Bitrig
+* DragonFly BSD
+* FreeBSD
+* Linux
+* NetBSD
+* OpenBSD
+* Solaris
+* Windows
 * iOS
+* macOS
 
 There are potentially others. If you find that Mio works on another
 platform, submit a PR to update the list!
 
 ## Community
 
-A group of Mio users hang out in the #mio channel on the Mozilla IRC
-server (irc.mozilla.org). This can be a good place to go for questions.
+A group of Mio users hang out on [Gitter], this can be a good place to go for
+questions.
+
+[Gitter]: https://gitter.im/tokio-rs/mio
 
 ## Contributing
 
@@ -87,4 +92,4 @@ If you want to propose an API change, create an issue to start a
 discussion with the community. Also, feel free to talk with us in the
 IRC channel.
 
-Finally, be kind. We support the [Rust Code of Conduct](https://www.rust-lang.org/conduct.html).
+Finally, be kind. We support the [Rust Code of Conduct](https://www.rust-lang.org/policies/code-of-conduct).

azure-pipelines.yml

@@ -3,9 +3,9 @@ pr: ["master", "v0.6.x"]
 
 jobs:
 # Check formatting
-# - template: ci/azure-rustfmt.yml
-#   parameters:
-#     name: rustfmt
+- template: ci/azure-rustfmt.yml
+  parameters:
+    name: rustfmt
 
 # Stable
 - template: ci/azure-test-stable.yml
@@ -14,13 +14,20 @@ jobs:
     displayName: Test
     cross: true
 
+# Stable --release
+- template: ci/azure-test-stable.yml
+  parameters:
+    name: stable_release
+    displayName: Test --release
+    cmd: test --release
+
 # Nightly
 - template: ci/azure-test-stable.yml
   parameters:
     name: nightly
     displayName: Nightly
     # Pin nightly to avoid being impacted by breakage
-    rust_version: nightly-2019-04-22
+    rust_version: nightly-2019-07-16
     benches: true
 
 # This represents the minimum Rust version supported by
@@ -32,10 +39,18 @@ jobs:
   parameters:
     name: minrust
     displayName: Min Rust
-    rust_version: 1.18.0
+    rust_version: 1.36.0
     cmd: check
     cross: true
 
+- template: ci/azure-minimal-versions.yml
+  parameters:
+    name: minimal_versions
+
+- template: ci/azure-clippy.yml
+  parameters:
+    name: clippy
+
 - template: ci/azure-cross-compile.yml
   parameters:
     name: cross

benches/bench_poll.rs

@@ -1,52 +0,0 @@
-#![feature(test)]
-
-extern crate mio;
-extern crate test;
-
-use mio::*;
-use test::Bencher;
-use std::sync::Arc;
-use std::thread;
-
-#[bench]
-fn bench_poll(bench: &mut Bencher) {
-    const NUM: usize = 10_000;
-    const THREADS: usize = 4;
-
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-
-    let mut registrations = vec![];
-    let mut set_readiness = vec![];
-
-    for i in 0..NUM {
-        let (r, s) = Registration::new(
-            &poll,
-            Token(i),
-            Ready::readable(),
-            PollOpt::edge());
-
-        registrations.push(r);
-        set_readiness.push(s);
-    }
-
-    let set_readiness = Arc::new(set_readiness);
-
-    bench.iter(move || {
-        for mut i in 0..THREADS {
-            let set_readiness = set_readiness.clone();
-            thread::spawn(move || {
-                while i < NUM {
-                    set_readiness[i].set_readiness(Ready::readable()).unwrap();
-                    i += THREADS;
-                }
-            });
-        }
-
-        let mut n = 0;
-
-        while n < NUM {
-            n += poll.poll(&mut events, None).unwrap();
-        }
-    })
-}

ci/azure-clippy.yml

@@ -0,0 +1,17 @@
+jobs:
+- job: ${{ parameters.name }}
+  displayName: Clippy
+
+  pool:
+    vmImage: ubuntu-16.04
+
+  steps:
+    - template: azure-install-rust.yml
+      parameters:
+        rust_version: stable
+
+    - script: rustup component add clippy
+      displayName: "Add component"
+
+    - script: cargo clippy --all-targets -- -D warnings -A clippy::cognitive-complexity
+      displayName: "Run Clippy"

ci/azure-cross-compile.yml

@@ -6,18 +6,30 @@ jobs:
   displayName: Cross
   strategy:
     matrix:
-      iOS:
+      iOS_64:
         vmImage: macOS-10.13
         target: x86_64-apple-ios
 
+      iOS_32:
+        vmImage: macOS-10.13
+        target: i386-apple-ios
+
+      iOS_ARM:
+        vmImage: macOS-10.13
+        target: armv7s-apple-ios
+
       Android:
         vmImage: ubuntu-16.04
         target: arm-linux-androideabi
 
-      Android_64:
+      Android_ARM64:
         vmImage: ubuntu-16.04
         target: aarch64-linux-android
 
+      Android_32:
+        vmImage: ubuntu-16.04
+        target: i686-unknown-linux-gnu
+
       NetBSD:
         vmImage: ubuntu-16.04
         target: x86_64-unknown-netbsd

ci/azure-install-rust.yml

@@ -2,7 +2,10 @@ steps:
   # Linux and macOS.
   - script: |
       set -e
-      curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain $RUSTUP_TOOLCHAIN
+      curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain none
+      export PATH=$PATH:$HOME/.cargo/bin
+      rustup toolchain install $RUSTUP_TOOLCHAIN
+      rustup default $RUSTUP_TOOLCHAIN
       echo "##vso[task.setvariable variable=PATH;]$PATH:$HOME/.cargo/bin"
     env:
       RUSTUP_TOOLCHAIN: ${{parameters.rust_version}}
@@ -12,8 +15,10 @@ steps:
   # Windows.
   - script: |
       curl -sSf -o rustup-init.exe https://win.rustup.rs
-      rustup-init.exe -y --default-toolchain %RUSTUP_TOOLCHAIN%
+      rustup-init.exe -y --default-toolchain none
       set PATH=%PATH%;%USERPROFILE%\.cargo\bin
+      rustup toolchain install %RUSTUP_TOOLCHAIN%
+      rustup default %RUSTUP_TOOLCHAIN%
       echo "##vso[task.setvariable variable=PATH;]%PATH%;%USERPROFILE%\.cargo\bin"
     env:
       RUSTUP_TOOLCHAIN: ${{parameters.rust_version}}
@@ -22,6 +27,7 @@ steps:
 
   # All platforms.
   - script: |
+        rustup toolchain list
         rustc -Vv
         cargo -V
     displayName: Query rust and cargo versions

ci/azure-minimal-versions.yml

@@ -0,0 +1,37 @@
+parameters:
+  rust_version: nightly
+
+jobs:
+- job: ${{ parameters.name }}
+  displayName: Minimal versions
+  strategy:
+    matrix:
+      Linux:
+        vmImage: ubuntu-16.04
+      Windows:
+        vmImage: vs2017-win2016
+  pool:
+    vmImage: $(vmImage)
+
+  variables:
+    RUST_BACKTRACE: full
+
+  steps:
+  - template: azure-install-rust.yml
+    parameters:
+      rust_version: ${{ parameters.rust_version }}
+
+  - script: cargo update -Zminimal-versions
+    displayName: cargo update -Zminimal-versions
+    env:
+      CI: 'True'
+
+  - script: cargo test
+    displayName: cargo test
+    env:
+      CI: 'True'
+
+  - script: cargo test --no-default-features
+    displayName: cargo test --no-default-features
+    env:
+      CI: 'True'

ci/azure-rustfmt.yml

@@ -0,0 +1,16 @@
+jobs:
+# Check formatting
+- job: ${{ parameters.name }}
+  displayName: Check rustfmt
+  pool:
+    vmImage: ubuntu-16.04
+  steps:
+    - template: azure-install-rust.yml
+      parameters:
+        rust_version: stable
+    - script: |
+        rustup component add rustfmt
+      displayName: Install rustfmt
+    - script: |
+        cargo fmt --all -- --check
+      displayName: Check formatting

ci/azure-test-stable.yml

@@ -18,6 +18,9 @@ jobs:
   pool:
     vmImage: $(vmImage)
 
+  variables:
+    RUST_BACKTRACE: full
+
   steps:
   - template: azure-install-rust.yml
     parameters:

src/channel.rs

@@ -1,390 +0,0 @@
-//! Thread safe communication channel implementing `Evented`
-
-#![allow(unused_imports, deprecated, missing_debug_implementations)]
-
-use {io, Ready, Poll, PollOpt, Registration, SetReadiness, Token};
-use event::Evented;
-use lazycell::{LazyCell, AtomicLazyCell};
-use std::any::Any;
-use std::fmt;
-use std::error;
-use std::sync::{mpsc, Arc};
-use std::sync::atomic::{AtomicUsize, Ordering};
-
-/// Creates a new asynchronous channel, where the `Receiver` can be registered
-/// with `Poll`.
-pub fn channel<T>() -> (Sender<T>, Receiver<T>) {
-    let (tx_ctl, rx_ctl) = ctl_pair();
-    let (tx, rx) = mpsc::channel();
-
-    let tx = Sender {
-        tx,
-        ctl: tx_ctl,
-    };
-
-    let rx = Receiver {
-        rx,
-        ctl: rx_ctl,
-    };
-
-    (tx, rx)
-}
-
-/// Creates a new synchronous, bounded channel where the `Receiver` can be
-/// registered with `Poll`.
-pub fn sync_channel<T>(bound: usize) -> (SyncSender<T>, Receiver<T>) {
-    let (tx_ctl, rx_ctl) = ctl_pair();
-    let (tx, rx) = mpsc::sync_channel(bound);
-
-    let tx = SyncSender {
-        tx,
-        ctl: tx_ctl,
-    };
-
-    let rx = Receiver {
-        rx,
-        ctl: rx_ctl,
-    };
-
-    (tx, rx)
-}
-
-pub fn ctl_pair() -> (SenderCtl, ReceiverCtl) {
-    let inner = Arc::new(Inner {
-        pending: AtomicUsize::new(0),
-        senders: AtomicUsize::new(1),
-        set_readiness: AtomicLazyCell::new(),
-    });
-
-    let tx = SenderCtl {
-        inner: inner.clone(),
-    };
-
-    let rx = ReceiverCtl {
-        registration: LazyCell::new(),
-        inner,
-    };
-
-    (tx, rx)
-}
-
-/// Tracks messages sent on a channel in order to update readiness.
-pub struct SenderCtl {
-    inner: Arc<Inner>,
-}
-
-/// Tracks messages received on a channel in order to track readiness.
-pub struct ReceiverCtl {
-    registration: LazyCell<Registration>,
-    inner: Arc<Inner>,
-}
-
-pub struct Sender<T> {
-    tx: mpsc::Sender<T>,
-    ctl: SenderCtl,
-}
-
-pub struct SyncSender<T> {
-    tx: mpsc::SyncSender<T>,
-    ctl: SenderCtl,
-}
-
-pub struct Receiver<T> {
-    rx: mpsc::Receiver<T>,
-    ctl: ReceiverCtl,
-}
-
-pub enum SendError<T> {
-    Io(io::Error),
-    Disconnected(T),
-}
-
-pub enum TrySendError<T> {
-    Io(io::Error),
-    Full(T),
-    Disconnected(T),
-}
-
-struct Inner {
-    // The number of outstanding messages for the receiver to read
-    pending: AtomicUsize,
-    // The number of sender handles
-    senders: AtomicUsize,
-    // The set readiness handle
-    set_readiness: AtomicLazyCell<SetReadiness>,
-}
-
-impl<T> Sender<T> {
-    pub fn send(&self, t: T) -> Result<(), SendError<T>> {
-        self.tx.send(t)
-            .map_err(SendError::from)
-            .and_then(|_| {
-                self.ctl.inc()?;
-                Ok(())
-            })
-    }
-}
-
-impl<T> Clone for Sender<T> {
-    fn clone(&self) -> Sender<T> {
-        Sender {
-            tx: self.tx.clone(),
-            ctl: self.ctl.clone(),
-        }
-    }
-}
-
-impl<T> SyncSender<T> {
-    pub fn send(&self, t: T) -> Result<(), SendError<T>> {
-        self.tx.send(t)
-            .map_err(From::from)
-            .and_then(|_| {
-                self.ctl.inc()?;
-                Ok(())
-            })
-    }
-
-    pub fn try_send(&self, t: T) -> Result<(), TrySendError<T>> {
-        self.tx.try_send(t)
-            .map_err(From::from)
-            .and_then(|_| {
-                self.ctl.inc()?;
-                Ok(())
-            })
-    }
-}
-
-impl<T> Clone for SyncSender<T> {
-    fn clone(&self) -> SyncSender<T> {
-        SyncSender {
-            tx: self.tx.clone(),
-            ctl: self.ctl.clone(),
-        }
-    }
-}
-
-impl<T> Receiver<T> {
-    pub fn try_recv(&self) -> Result<T, mpsc::TryRecvError> {
-        self.rx.try_recv().and_then(|res| {
-            let _ = self.ctl.dec();
-            Ok(res)
-        })
-    }
-}
-
-impl<T> Evented for Receiver<T> {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.ctl.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.ctl.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.ctl.deregister(poll)
-    }
-}
-
-/*
- *
- * ===== SenderCtl / ReceiverCtl =====
- *
- */
-
-impl SenderCtl {
-    /// Call to track that a message has been sent
-    pub fn inc(&self) -> io::Result<()> {
-        let cnt = self.inner.pending.fetch_add(1, Ordering::Acquire);
-
-        if 0 == cnt {
-            // Toggle readiness to readable
-            if let Some(set_readiness) = self.inner.set_readiness.borrow() {
-                set_readiness.set_readiness(Ready::readable())?;
-            }
-        }
-
-        Ok(())
-    }
-}
-
-impl Clone for SenderCtl {
-    fn clone(&self) -> SenderCtl {
-        self.inner.senders.fetch_add(1, Ordering::Relaxed);
-        SenderCtl { inner: self.inner.clone() }
-    }
-}
-
-impl Drop for SenderCtl {
-    fn drop(&mut self) {
-        if self.inner.senders.fetch_sub(1, Ordering::Release) == 1 {
-            let _ = self.inc();
-        }
-    }
-}
-
-impl ReceiverCtl {
-    pub fn dec(&self) -> io::Result<()> {
-        let first = self.inner.pending.load(Ordering::Acquire);
-
-        if first == 1 {
-            // Unset readiness
-            if let Some(set_readiness) = self.inner.set_readiness.borrow() {
-                set_readiness.set_readiness(Ready::empty())?;
-            }
-        }
-
-        // Decrement
-        let second = self.inner.pending.fetch_sub(1, Ordering::AcqRel);
-
-        if first == 1 && second > 1 {
-            // There are still pending messages. Since readiness was
-            // previously unset, it must be reset here
-            if let Some(set_readiness) = self.inner.set_readiness.borrow() {
-                set_readiness.set_readiness(Ready::readable())?;
-            }
-        }
-
-        Ok(())
-    }
-}
-
-impl Evented for ReceiverCtl {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        if self.registration.borrow().is_some() {
-            return Err(io::Error::new(io::ErrorKind::Other, "receiver already registered"));
-        }
-
-        let (registration, set_readiness) = Registration::new(poll, token, interest, opts);
-
-
-        if self.inner.pending.load(Ordering::Relaxed) > 0 {
-            // TODO: Don't drop readiness
-            let _ = set_readiness.set_readiness(Ready::readable());
-        }
-
-        self.registration.fill(registration).expect("unexpected state encountered");
-        self.inner.set_readiness.fill(set_readiness).expect("unexpected state encountered");
-
-        Ok(())
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        match self.registration.borrow() {
-            Some(registration) => registration.update(poll, token, interest, opts),
-            None => Err(io::Error::new(io::ErrorKind::Other, "receiver not registered")),
-        }
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        match self.registration.borrow() {
-            Some(registration) => registration.deregister(poll),
-            None => Err(io::Error::new(io::ErrorKind::Other, "receiver not registered")),
-        }
-    }
-}
-
-/*
- *
- * ===== Error conversions =====
- *
- */
-
-impl<T> From<mpsc::SendError<T>> for SendError<T> {
-    fn from(src: mpsc::SendError<T>) -> SendError<T> {
-        SendError::Disconnected(src.0)
-    }
-}
-
-impl<T> From<io::Error> for SendError<T> {
-    fn from(src: io::Error) -> SendError<T> {
-        SendError::Io(src)
-    }
-}
-
-impl<T> From<mpsc::TrySendError<T>> for TrySendError<T> {
-    fn from(src: mpsc::TrySendError<T>) -> TrySendError<T> {
-        match src {
-            mpsc::TrySendError::Full(v) => TrySendError::Full(v),
-            mpsc::TrySendError::Disconnected(v) => TrySendError::Disconnected(v),
-        }
-    }
-}
-
-impl<T> From<mpsc::SendError<T>> for TrySendError<T> {
-    fn from(src: mpsc::SendError<T>) -> TrySendError<T> {
-        TrySendError::Disconnected(src.0)
-    }
-}
-
-impl<T> From<io::Error> for TrySendError<T> {
-    fn from(src: io::Error) -> TrySendError<T> {
-        TrySendError::Io(src)
-    }
-}
-
-/*
- *
- * ===== Implement Error, Debug and Display for Errors =====
- *
- */
-
-impl<T: Any> error::Error for SendError<T> {
-    fn description(&self) -> &str {
-        match *self {
-            SendError::Io(ref io_err) => io_err.description(),
-            SendError::Disconnected(..) => "Disconnected",
-        }
-    }
-}
-
-impl<T: Any> error::Error for TrySendError<T> {
-    fn description(&self) -> &str {
-        match *self {
-            TrySendError::Io(ref io_err) => io_err.description(),
-            TrySendError::Full(..) => "Full",
-            TrySendError::Disconnected(..) => "Disconnected",
-        }
-    }
-}
-
-impl<T> fmt::Debug for SendError<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        format_send_error(self, f)
-    }
-}
-
-impl<T> fmt::Display for SendError<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        format_send_error(self, f)
-    }
-}
-
-impl<T> fmt::Debug for TrySendError<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        format_try_send_error(self, f)
-    }
-}
-
-impl<T> fmt::Display for TrySendError<T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        format_try_send_error(self, f)
-    }
-}
-
-#[inline]
-fn format_send_error<T>(e: &SendError<T>, f: &mut fmt::Formatter) -> fmt::Result {
-    match *e {
-        SendError::Io(ref io_err) => write!(f, "{}", io_err),
-        SendError::Disconnected(..) => write!(f, "Disconnected"),
-    }
-}
-
-#[inline]
-fn format_try_send_error<T>(e: &TrySendError<T>, f: &mut fmt::Formatter) -> fmt::Result {
-    match *e {
-        TrySendError::Io(ref io_err) => write!(f, "{}", io_err),
-        TrySendError::Full(..) => write!(f, "Full"),
-        TrySendError::Disconnected(..) => write!(f, "Disconnected"),
-    }
-}

src/deprecated/event_loop.rs

@@ -1,346 +0,0 @@
-use {channel, Poll, Events, Token};
-use event::Evented;
-use deprecated::{Handler, NotifyError};
-use event_imp::{Event, Ready, PollOpt};
-use timer::{self, Timer, Timeout};
-use std::{io, fmt, usize};
-use std::default::Default;
-use std::time::Duration;
-
-#[derive(Debug, Default, Clone)]
-pub struct EventLoopBuilder {
-    config: Config,
-}
-
-/// `EventLoop` configuration details
-#[derive(Clone, Debug)]
-struct Config {
-    // == Notifications ==
-    notify_capacity: usize,
-    messages_per_tick: usize,
-
-    // == Timer ==
-    timer_tick: Duration,
-    timer_wheel_size: usize,
-    timer_capacity: usize,
-}
-
-impl Default for Config {
-    fn default() -> Config {
-        // Default EventLoop configuration values
-        Config {
-            notify_capacity: 4_096,
-            messages_per_tick: 256,
-            timer_tick: Duration::from_millis(100),
-            timer_wheel_size: 1_024,
-            timer_capacity: 65_536,
-        }
-    }
-}
-
-impl EventLoopBuilder {
-    /// Construct a new `EventLoopBuilder` with the default configuration
-    /// values.
-    pub fn new() -> EventLoopBuilder {
-        EventLoopBuilder::default()
-    }
-
-    /// Sets the maximum number of messages that can be buffered on the event
-    /// loop's notification channel before a send will fail.
-    ///
-    /// The default value for this is 4096.
-    pub fn notify_capacity(&mut self, capacity: usize) -> &mut Self {
-        self.config.notify_capacity = capacity;
-        self
-    }
-
-    /// Sets the maximum number of messages that can be processed on any tick of
-    /// the event loop.
-    ///
-    /// The default value for this is 256.
-    pub fn messages_per_tick(&mut self, messages: usize) -> &mut Self {
-        self.config.messages_per_tick = messages;
-        self
-    }
-
-    pub fn timer_tick(&mut self, val: Duration) -> &mut Self {
-        self.config.timer_tick = val;
-        self
-    }
-
-    pub fn timer_wheel_size(&mut self, size: usize) -> &mut Self {
-        self.config.timer_wheel_size = size;
-        self
-    }
-
-    pub fn timer_capacity(&mut self, cap: usize) -> &mut Self {
-        self.config.timer_capacity = cap;
-        self
-    }
-
-    /// Constructs a new `EventLoop` using the configured values. The
-    /// `EventLoop` will not be running.
-    pub fn build<H: Handler>(self) -> io::Result<EventLoop<H>> {
-        EventLoop::configured(self.config)
-    }
-}
-
-/// Single threaded IO event loop.
-pub struct EventLoop<H: Handler> {
-    run: bool,
-    poll: Poll,
-    events: Events,
-    timer: Timer<H::Timeout>,
-    notify_tx: channel::SyncSender<H::Message>,
-    notify_rx: channel::Receiver<H::Message>,
-    config: Config,
-}
-
-// Token used to represent notifications
-const NOTIFY: Token = Token(usize::MAX - 1);
-const TIMER: Token = Token(usize::MAX - 2);
-
-impl<H: Handler> EventLoop<H> {
-
-    /// Constructs a new `EventLoop` using the default configuration values.
-    /// The `EventLoop` will not be running.
-    pub fn new() -> io::Result<EventLoop<H>> {
-        EventLoop::configured(Config::default())
-    }
-
-    fn configured(config: Config) -> io::Result<EventLoop<H>> {
-        // Create the IO poller
-        let poll = Poll::new()?;
-
-        let timer = timer::Builder::default()
-            .tick_duration(config.timer_tick)
-            .num_slots(config.timer_wheel_size)
-            .capacity(config.timer_capacity)
-            .build();
-
-        // Create cross thread notification queue
-        let (tx, rx) = channel::sync_channel(config.notify_capacity);
-
-        // Register the notification wakeup FD with the IO poller
-        poll.register(&rx, NOTIFY, Ready::readable(), PollOpt::edge() | PollOpt::oneshot())?;
-        poll.register(&timer, TIMER, Ready::readable(), PollOpt::edge())?;
-
-        Ok(EventLoop {
-            run: true,
-            poll,
-            timer,
-            notify_tx: tx,
-            notify_rx: rx,
-            config,
-            events: Events::with_capacity(1024),
-        })
-    }
-
-    /// Returns a sender that allows sending messages to the event loop in a
-    /// thread-safe way, waking up the event loop if needed.
-    ///
-    /// # Implementation Details
-    ///
-    /// Each [EventLoop](#) contains a lock-free queue with a pre-allocated
-    /// buffer size. The size can be changed by modifying
-    /// [EventLoopConfig.notify_capacity](struct.EventLoopConfig.html#method.notify_capacity).
-    /// When a message is sent to the EventLoop, it is first pushed on to the
-    /// queue. Then, if the EventLoop is currently running, an atomic flag is
-    /// set to indicate that the next loop iteration should be started without
-    /// waiting.
-    ///
-    /// If the loop is blocked waiting for IO events, then it is woken up. The
-    /// strategy for waking up the event loop is platform dependent. For
-    /// example, on a modern Linux OS, eventfd is used. On older OSes, a pipe
-    /// is used.
-    ///
-    /// The strategy of setting an atomic flag if the event loop is not already
-    /// sleeping allows avoiding an expensive wakeup operation if at all possible.
-    pub fn channel(&self) -> Sender<H::Message> {
-        Sender::new(self.notify_tx.clone())
-    }
-
-    /// Schedules a timeout after the requested time interval. When the
-    /// duration has been reached,
-    /// [Handler::timeout](trait.Handler.html#method.timeout) will be invoked
-    /// passing in the supplied token.
-    ///
-    /// Returns a handle to the timeout that can be used to cancel the timeout
-    /// using [#clear_timeout](#method.clear_timeout).
-    pub fn timeout(&mut self, token: H::Timeout, delay: Duration) -> timer::Result<Timeout> {
-        self.timer.set_timeout(delay, token)
-    }
-
-    /// If the supplied timeout has not been triggered, cancel it such that it
-    /// will not be triggered in the future.
-    pub fn clear_timeout(&mut self, timeout: &Timeout) -> bool {
-        self.timer.cancel_timeout(&timeout).is_some()
-    }
-
-    /// Tells the event loop to exit after it is done handling all events in the
-    /// current iteration.
-    pub fn shutdown(&mut self) {
-        self.run = false;
-    }
-
-    /// Indicates whether the event loop is currently running. If it's not it has either
-    /// stopped or is scheduled to stop on the next tick.
-    pub fn is_running(&self) -> bool {
-        self.run
-    }
-
-    /// Registers an IO handle with the event loop.
-    pub fn register<E: ?Sized>(&mut self, io: &E, token: Token, interest: Ready, opt: PollOpt) -> io::Result<()>
-        where E: Evented
-    {
-        self.poll.register(io, token, interest, opt)
-    }
-
-    /// Re-Registers an IO handle with the event loop.
-    pub fn reregister<E: ?Sized>(&mut self, io: &E, token: Token, interest: Ready, opt: PollOpt) -> io::Result<()>
-        where E: Evented
-    {
-        self.poll.reregister(io, token, interest, opt)
-    }
-
-    /// Keep spinning the event loop indefinitely, and notify the handler whenever
-    /// any of the registered handles are ready.
-    pub fn run(&mut self, handler: &mut H) -> io::Result<()> {
-        self.run = true;
-
-        while self.run {
-            // Execute ticks as long as the event loop is running
-            self.run_once(handler, None)?;
-        }
-
-        Ok(())
-    }
-
-    /// Deregisters an IO handle with the event loop.
-    ///
-    /// Both kqueue and epoll will automatically clear any pending events when closing a
-    /// file descriptor (socket). In that case, this method does not need to be called
-    /// prior to dropping a connection from the slab.
-    ///
-    /// Warning: kqueue effectively builds in deregister when using edge-triggered mode with
-    /// oneshot. Calling `deregister()` on the socket will cause a TcpStream error.
-    pub fn deregister<E: ?Sized>(&mut self, io: &E) -> io::Result<()> where E: Evented {
-        self.poll.deregister(io)
-    }
-
-    /// Spin the event loop once, with a given timeout (forever if `None`),
-    /// and notify the handler if any of the registered handles become ready
-    /// during that time.
-    pub fn run_once(&mut self, handler: &mut H, timeout: Option<Duration>) -> io::Result<()> {
-        trace!("event loop tick");
-
-        // Check the registered IO handles for any new events. Each poll
-        // is for one second, so a shutdown request can last as long as
-        // one second before it takes effect.
-        let events = match self.io_poll(timeout) {
-            Ok(e) => e,
-            Err(err) => {
-                if err.kind() == io::ErrorKind::Interrupted {
-                    handler.interrupted(self);
-                    0
-                } else {
-                    return Err(err);
-                }
-            }
-        };
-
-        self.io_process(handler, events);
-        handler.tick(self);
-        Ok(())
-    }
-
-    #[inline]
-    fn io_poll(&mut self, timeout: Option<Duration>) -> io::Result<usize> {
-        self.poll.poll(&mut self.events, timeout)
-    }
-
-    // Process IO events that have been previously polled
-    fn io_process(&mut self, handler: &mut H, cnt: usize) {
-        let mut i = 0;
-
-        trace!("io_process(..); cnt={}; len={}", cnt, self.events.len());
-
-        // Iterate over the notifications. Each event provides the token
-        // it was registered with (which usually represents, at least, the
-        // handle that the event is about) as well as information about
-        // what kind of event occurred (readable, writable, signal, etc.)
-        while i < cnt {
-            let evt = self.events.get(i).unwrap();
-
-            trace!("event={:?}; idx={:?}", evt, i);
-
-            match evt.token() {
-                NOTIFY => self.notify(handler),
-                TIMER => self.timer_process(handler),
-                _ => self.io_event(handler, evt)
-            }
-
-            i += 1;
-        }
-    }
-
-    fn io_event(&mut self, handler: &mut H, evt: Event) {
-        handler.ready(self, evt.token(), evt.readiness());
-    }
-
-    fn notify(&mut self, handler: &mut H) {
-        for _ in 0..self.config.messages_per_tick {
-            match self.notify_rx.try_recv() {
-                Ok(msg) => handler.notify(self, msg),
-                _ => break,
-            }
-        }
-
-        // Re-register
-        let _ = self.poll.reregister(&self.notify_rx, NOTIFY, Ready::readable(), PollOpt::edge() | PollOpt::oneshot());
-    }
-
-    fn timer_process(&mut self, handler: &mut H) {
-        while let Some(t) = self.timer.poll() {
-            handler.timeout(self, t);
-        }
-    }
-}
-
-impl<H: Handler> fmt::Debug for EventLoop<H> {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt.debug_struct("EventLoop")
-            .field("run", &self.run)
-            .field("poll", &self.poll)
-            .field("config", &self.config)
-            .finish()
-    }
-}
-
-/// Sends messages to the EventLoop from other threads.
-pub struct Sender<M> {
-    tx: channel::SyncSender<M>
-}
-
-impl<M> fmt::Debug for Sender<M> {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        write!(fmt, "Sender<?> {{ ... }}")
-    }
-}
-
-impl<M> Clone for Sender <M> {
-    fn clone(&self) -> Sender<M> {
-        Sender { tx: self.tx.clone() }
-    }
-}
-
-impl<M> Sender<M> {
-    fn new(tx: channel::SyncSender<M>) -> Sender<M> {
-        Sender { tx }
-    }
-
-    pub fn send(&self, msg: M) -> Result<(), NotifyError<M>> {
-        self.tx.try_send(msg)?;
-        Ok(())
-    }
-}

src/deprecated/handler.rs

@@ -1,37 +0,0 @@
-use {Ready, Token};
-use deprecated::{EventLoop};
-
-#[allow(unused_variables)]
-pub trait Handler: Sized {
-    type Timeout;
-    type Message;
-
-    /// Invoked when the socket represented by `token` is ready to be operated
-    /// on. `events` indicates the specific operations that are
-    /// ready to be performed.
-    ///
-    /// For example, when a TCP socket is ready to be read from, `events` will
-    /// have `readable` set. When the socket is ready to be written to,
-    /// `events` will have `writable` set.
-    ///
-    /// This function will only be invoked a single time per socket per event
-    /// loop tick.
-    fn ready(&mut self, event_loop: &mut EventLoop<Self>, token: Token, events: Ready) {
-    }
-
-    /// Invoked when a message has been received via the event loop's channel.
-    fn notify(&mut self, event_loop: &mut EventLoop<Self>, msg: Self::Message) {
-    }
-
-    /// Invoked when a timeout has completed.
-    fn timeout(&mut self, event_loop: &mut EventLoop<Self>, timeout: Self::Timeout) {
-    }
-
-    /// Invoked when `EventLoop` has been interrupted by a signal interrupt.
-    fn interrupted(&mut self, event_loop: &mut EventLoop<Self>) {
-    }
-
-    /// Invoked at the end of an event loop tick.
-    fn tick(&mut self, event_loop: &mut EventLoop<Self>) {
-    }
-}

src/deprecated/io.rs

@@ -1,28 +0,0 @@
-use ::io::MapNonBlock;
-use std::io::{self, Read, Write};
-
-pub trait TryRead {
-    fn try_read(&mut self, buf: &mut [u8]) -> io::Result<Option<usize>>;
-}
-
-pub trait TryWrite {
-    fn try_write(&mut self, buf: &[u8]) -> io::Result<Option<usize>>;
-}
-
-impl<T: Read> TryRead for T {
-    fn try_read(&mut self, dst: &mut [u8]) -> io::Result<Option<usize>> {
-        self.read(dst).map_non_block()
-    }
-}
-
-impl<T: Write> TryWrite for T {
-    fn try_write(&mut self, src: &[u8]) -> io::Result<Option<usize>> {
-        self.write(src).map_non_block()
-    }
-}
-
-pub trait TryAccept {
-    type Output;
-
-    fn accept(&self) -> io::Result<Option<Self::Output>>;
-}

src/deprecated/mod.rs

@@ -1,36 +0,0 @@
-#![allow(deprecated)]
-
-mod event_loop;
-mod io;
-mod handler;
-mod notify;
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-pub mod unix;
-
-pub use self::event_loop::{
-    EventLoop,
-    EventLoopBuilder,
-    Sender,
-};
-pub use self::io::{
-    TryAccept,
-    TryRead,
-    TryWrite,
-};
-pub use self::handler::{
-    Handler,
-};
-pub use self::notify::{
-    NotifyError,
-};
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-pub use self::unix::{
-    pipe,
-    PipeReader,
-    PipeWriter,
-    UnixListener,
-    UnixSocket,
-    UnixStream,
-    Shutdown,
-};

src/deprecated/notify.rs

@@ -1,63 +0,0 @@
-use {channel};
-use std::{fmt, io, error, any};
-
-pub enum NotifyError<T> {
-    Io(io::Error),
-    Full(T),
-    Closed(Option<T>),
-}
-
-impl<M> fmt::Debug for NotifyError<M> {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            NotifyError::Io(ref e) => {
-                write!(fmt, "NotifyError::Io({:?})", e)
-            }
-            NotifyError::Full(..) => {
-                write!(fmt, "NotifyError::Full(..)")
-            }
-            NotifyError::Closed(..) => {
-                write!(fmt, "NotifyError::Closed(..)")
-            }
-        }
-    }
-}
-
-impl<M> fmt::Display for NotifyError<M> {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            NotifyError::Io(ref e) => {
-                write!(fmt, "IO error: {}", e)
-            }
-            NotifyError::Full(..) => write!(fmt, "Full"),
-            NotifyError::Closed(..) => write!(fmt, "Closed")
-        }
-    }
-}
-
-impl<M: any::Any> error::Error for NotifyError<M> {
-    fn description(&self) -> &str {
-        match *self {
-            NotifyError::Io(ref err) => err.description(),
-            NotifyError::Closed(..) => "The receiving end has hung up",
-            NotifyError::Full(..) => "Queue is full"
-        }
-    }
-
-    fn cause(&self) -> Option<&error::Error> {
-        match *self {
-            NotifyError::Io(ref err) => Some(err),
-            _ => None
-        }
-    }
-}
-
-impl<M> From<channel::TrySendError<M>> for NotifyError<M> {
-    fn from(src: channel::TrySendError<M>) -> NotifyError<M> {
-        match src {
-            channel::TrySendError::Io(e) => NotifyError::Io(e),
-            channel::TrySendError::Full(v) => NotifyError::Full(v),
-            channel::TrySendError::Disconnected(v) => NotifyError::Closed(Some(v)),
-        }
-    }
-}

src/deprecated/unix.rs

@@ -1,420 +0,0 @@
-use {io, sys, Ready, Poll, PollOpt, Token};
-use event::Evented;
-use deprecated::TryAccept;
-use io::MapNonBlock;
-use std::io::{Read, Write};
-use std::path::Path;
-pub use std::net::Shutdown;
-use std::process;
-
-pub use sys::Io;
-
-#[derive(Debug)]
-pub struct UnixSocket {
-    sys: sys::UnixSocket,
-}
-
-impl UnixSocket {
-    /// Returns a new, unbound, non-blocking Unix domain socket
-    pub fn stream() -> io::Result<UnixSocket> {
-        sys::UnixSocket::stream()
-            .map(From::from)
-    }
-
-    /// Connect the socket to the specified address
-    pub fn connect<P: AsRef<Path> + ?Sized>(self, addr: &P) -> io::Result<(UnixStream, bool)> {
-        let complete = match self.sys.connect(addr) {
-            Ok(()) => true,
-            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => false,
-            Err(e) => return Err(e),
-        };
-        Ok((From::from(self.sys), complete))
-    }
-
-    /// Bind the socket to the specified address
-    pub fn bind<P: AsRef<Path> + ?Sized>(&self, addr: &P) -> io::Result<()> {
-        self.sys.bind(addr)
-    }
-
-    /// Listen for incoming requests
-    pub fn listen(self, backlog: usize) -> io::Result<UnixListener> {
-        self.sys.listen(backlog)?;
-        Ok(From::from(self.sys))
-    }
-
-    pub fn try_clone(&self) -> io::Result<UnixSocket> {
-        self.sys.try_clone()
-            .map(From::from)
-    }
-}
-
-impl Evented for UnixSocket {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.sys.deregister(poll)
-    }
-}
-
-impl From<sys::UnixSocket> for UnixSocket {
-    fn from(sys: sys::UnixSocket) -> UnixSocket {
-        UnixSocket { sys }
-    }
-}
-
-/*
- *
- * ===== UnixStream =====
- *
- */
-
-#[derive(Debug)]
-pub struct UnixStream {
-    sys: sys::UnixSocket,
-}
-
-impl UnixStream {
-    pub fn connect<P: AsRef<Path> + ?Sized>(path: &P) -> io::Result<UnixStream> {
-        UnixSocket::stream()
-            .and_then(|sock| sock.connect(path))
-            .map(|(sock, _)| sock)
-    }
-
-    pub fn try_clone(&self) -> io::Result<UnixStream> {
-        self.sys.try_clone()
-            .map(From::from)
-    }
-
-    pub fn shutdown(&self, how: Shutdown) -> io::Result<usize> {
-        self.sys.shutdown(how).map(|_| 0)
-    }
-
-    pub fn read_recv_fd(&mut self, buf: &mut [u8]) -> io::Result<(usize, Option<RawFd>)> {
-        self.sys.read_recv_fd(buf)
-    }
-
-    pub fn try_read_recv_fd(&mut self, buf: &mut [u8]) -> io::Result<Option<(usize, Option<RawFd>)>> {
-        self.read_recv_fd(buf).map_non_block()
-    }
-
-    pub fn write_send_fd(&mut self, buf: &[u8], fd: RawFd) -> io::Result<usize> {
-        self.sys.write_send_fd(buf, fd)
-    }
-
-    pub fn try_write_send_fd(&mut self, buf: &[u8], fd: RawFd) -> io::Result<Option<usize>> {
-        self.write_send_fd(buf, fd).map_non_block()
-    }
-}
-
-impl Read for UnixStream {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        self.sys.read(buf)
-    }
-}
-
-impl Write for UnixStream {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        self.sys.write(buf)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        self.sys.flush()
-    }
-}
-
-impl Evented for UnixStream {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.sys.deregister(poll)
-    }
-}
-
-impl From<sys::UnixSocket> for UnixStream {
-    fn from(sys: sys::UnixSocket) -> UnixStream {
-        UnixStream { sys }
-    }
-}
-
-/*
- *
- * ===== UnixListener =====
- *
- */
-
-#[derive(Debug)]
-pub struct UnixListener {
-    sys: sys::UnixSocket,
-}
-
-impl UnixListener {
-    pub fn bind<P: AsRef<Path> + ?Sized>(addr: &P) -> io::Result<UnixListener> {
-        UnixSocket::stream().and_then(|sock| {
-            sock.bind(addr)?;
-            sock.listen(256)
-        })
-    }
-
-    pub fn accept(&self) -> io::Result<UnixStream> {
-        self.sys.accept().map(From::from)
-    }
-
-    pub fn try_clone(&self) -> io::Result<UnixListener> {
-        self.sys.try_clone().map(From::from)
-    }
-}
-
-impl Evented for UnixListener {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.sys.deregister(poll)
-    }
-}
-
-impl TryAccept for UnixListener {
-    type Output = UnixStream;
-
-    fn accept(&self) -> io::Result<Option<UnixStream>> {
-        UnixListener::accept(self).map_non_block()
-    }
-}
-
-impl From<sys::UnixSocket> for UnixListener {
-    fn from(sys: sys::UnixSocket) -> UnixListener {
-        UnixListener { sys }
-    }
-}
-
-/*
- *
- * ===== Pipe =====
- *
- */
-
-pub fn pipe() -> io::Result<(PipeReader, PipeWriter)> {
-    let (rd, wr) = sys::pipe()?;
-    Ok((From::from(rd), From::from(wr)))
-}
-
-#[derive(Debug)]
-pub struct PipeReader {
-    io: Io,
-}
-
-impl PipeReader {
-    pub fn from_stdout(stdout: process::ChildStdout) -> io::Result<Self> {
-        if let Err(e) = sys::set_nonblock(stdout.as_raw_fd()) {
-            return Err(e);
-        }
-        Ok(PipeReader::from(unsafe { Io::from_raw_fd(stdout.into_raw_fd()) }))
-    }
-    pub fn from_stderr(stderr: process::ChildStderr) -> io::Result<Self> {
-        if let Err(e) = sys::set_nonblock(stderr.as_raw_fd()) {
-            return Err(e);
-        }
-        Ok(PipeReader::from(unsafe { Io::from_raw_fd(stderr.into_raw_fd()) }))
-    }
-}
-
-impl Read for PipeReader {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        self.io.read(buf)
-    }
-}
-
-impl<'a> Read for &'a PipeReader {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        (&self.io).read(buf)
-    }
-}
-
-impl Evented for PipeReader {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.io.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.io.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.io.deregister(poll)
-    }
-}
-
-impl From<Io> for PipeReader {
-    fn from(io: Io) -> PipeReader {
-        PipeReader { io }
-    }
-}
-
-#[derive(Debug)]
-pub struct PipeWriter {
-    io: Io,
-}
-
-impl PipeWriter {
-    pub fn from_stdin(stdin: process::ChildStdin) -> io::Result<Self> {
-        if let Err(e) = sys::set_nonblock(stdin.as_raw_fd()) {
-            return Err(e);
-        }
-        Ok(PipeWriter::from(unsafe { Io::from_raw_fd(stdin.into_raw_fd()) }))
-    }
-}
-
-impl Write for PipeWriter {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        self.io.write(buf)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        self.io.flush()
-    }
-}
-
-impl<'a> Write for &'a PipeWriter {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        (&self.io).write(buf)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        (&self.io).flush()
-    }
-}
-
-impl Evented for PipeWriter {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.io.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.io.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.io.deregister(poll)
-    }
-}
-
-impl From<Io> for PipeWriter {
-    fn from(io: Io) -> PipeWriter {
-        PipeWriter { io }
-    }
-}
-
-/*
- *
- * ===== Conversions =====
- *
- */
-
-use std::os::unix::io::{RawFd, IntoRawFd, AsRawFd, FromRawFd};
-
-impl IntoRawFd for UnixSocket {
-    fn into_raw_fd(self) -> RawFd {
-        self.sys.into_raw_fd()
-    }
-}
-
-impl AsRawFd for UnixSocket {
-    fn as_raw_fd(&self) -> RawFd {
-        self.sys.as_raw_fd()
-    }
-}
-
-impl FromRawFd for UnixSocket {
-    unsafe fn from_raw_fd(fd: RawFd) -> UnixSocket {
-        UnixSocket { sys: FromRawFd::from_raw_fd(fd) }
-    }
-}
-
-impl IntoRawFd for UnixStream {
-    fn into_raw_fd(self) -> RawFd {
-        self.sys.into_raw_fd()
-    }
-}
-
-impl AsRawFd for UnixStream {
-    fn as_raw_fd(&self) -> RawFd {
-        self.sys.as_raw_fd()
-    }
-}
-
-impl FromRawFd for UnixStream {
-    unsafe fn from_raw_fd(fd: RawFd) -> UnixStream {
-        UnixStream { sys: FromRawFd::from_raw_fd(fd) }
-    }
-}
-
-impl IntoRawFd for UnixListener {
-    fn into_raw_fd(self) -> RawFd {
-        self.sys.into_raw_fd()
-    }
-}
-
-impl AsRawFd for UnixListener {
-    fn as_raw_fd(&self) -> RawFd {
-        self.sys.as_raw_fd()
-    }
-}
-
-impl FromRawFd for UnixListener {
-    unsafe fn from_raw_fd(fd: RawFd) -> UnixListener {
-        UnixListener { sys: FromRawFd::from_raw_fd(fd) }
-    }
-}
-
-impl IntoRawFd for PipeReader {
-    fn into_raw_fd(self) -> RawFd {
-        self.io.into_raw_fd()
-    }
-}
-
-impl AsRawFd for PipeReader {
-    fn as_raw_fd(&self) -> RawFd {
-        self.io.as_raw_fd()
-    }
-}
-
-impl FromRawFd for PipeReader {
-    unsafe fn from_raw_fd(fd: RawFd) -> PipeReader {
-        PipeReader { io: FromRawFd::from_raw_fd(fd) }
-    }
-}
-
-impl IntoRawFd for PipeWriter {
-    fn into_raw_fd(self) -> RawFd {
-        self.io.into_raw_fd()
-    }
-}
-
-impl AsRawFd for PipeWriter {
-    fn as_raw_fd(&self) -> RawFd {
-        self.io.as_raw_fd()
-    }
-}
-
-impl FromRawFd for PipeWriter {
-    unsafe fn from_raw_fd(fd: RawFd) -> PipeWriter {
-        PipeWriter { io: FromRawFd::from_raw_fd(fd) }
-    }
-}

src/event/event.rs

@@ -0,0 +1,200 @@
+use crate::{sys, Token};
+
+use std::fmt;
+
+/// A readiness event.
+///
+/// `Event` is a readiness state paired with a [`Token`]. It is returned by
+/// [`Poll::poll`].
+///
+/// For more documentation on polling and events, see [`Poll`].
+///
+/// [`Poll::poll`]: crate::Poll::poll
+/// [`Poll`]: crate::Poll
+/// [`Token`]: crate::Token
+#[repr(transparent)]
+pub struct Event {
+    inner: sys::Event,
+}
+
+impl Event {
+    /// Returns the event's token.
+    #[inline]
+    pub fn token(&self) -> Token {
+        sys::event::token(&self.inner)
+    }
+
+    /// Returns true if the event contains readable readiness.
+    #[inline]
+    pub fn is_readable(&self) -> bool {
+        sys::event::is_readable(&self.inner)
+    }
+
+    /// Returns true if the event contains writable readiness.
+    #[inline]
+    pub fn is_writable(&self) -> bool {
+        sys::event::is_writable(&self.inner)
+    }
+
+    /// Returns true if the event contains error readiness.
+    ///
+    /// Error events occur when the socket enters an error state. In this case,
+    /// the socket will also receive a readable or writable event. Reading or
+    /// writing to the socket will result in an error.
+    ///
+    /// # Notes
+    ///
+    /// Method is available on all platforms, but not all platforms trigger the
+    /// error event.
+    ///
+    /// The table below shows what flags are checked on what OS.
+    ///
+    /// | [OS selector] | Flag(s) checked |
+    /// |---------------|-----------------|
+    /// | [epoll]       | `EPOLLERR`      |
+    /// | [kqueue]      | `EV_ERROR` and `EV_EOF` with `fflags` set to `0`. |
+    ///
+    /// [OS selector]: ../struct.Poll.html#implementation-notes
+    /// [epoll]: http://man7.org/linux/man-pages/man7/epoll.7.html
+    /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+    #[inline]
+    pub fn is_error(&self) -> bool {
+        sys::event::is_error(&self.inner)
+    }
+
+    /// Returns true if the event contains HUP readiness.
+    ///
+    /// # Notes
+    ///
+    /// Method is available on all platforms, but not all platforms trigger the
+    /// HUP event.
+    ///
+    /// Because of the above be cautions when using this in cross-platform
+    /// applications, Mio makes no attempt at normalising this indicator and
+    /// only provides a convenience method to read it. Refer to the selector
+    /// documentation (below) when using this indicator.
+    ///
+    /// The table below shows what flags are checked on what OS.
+    ///
+    /// | [OS selector] | Flag(s) checked |
+    /// |---------------|-----------------|
+    /// | [epoll]       | `EPOLLHUP`      |
+    /// | [kqueue]      | Not supported   |
+    ///
+    /// [OS selector]: ../struct.Poll.html#implementation-notes
+    /// [epoll]: http://man7.org/linux/man-pages/man7/epoll.7.html
+    /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+    #[inline]
+    pub fn is_hup(&self) -> bool {
+        sys::event::is_hup(&self.inner)
+    }
+
+    /// Returns true if the event contains read HUP readiness.
+    ///
+    /// # Notes
+    ///
+    /// Method is available on all platforms, but not all platforms trigger the
+    /// read HUP event.
+    ///
+    /// Because of the above be cautions when using this in cross-platform
+    /// applications, Mio makes no attempt at normalising this indicator and
+    /// only provides a convenience method to read it. We advice looking at the
+    /// documentation provided for the selectors (see below) when using this
+    /// indicator.
+    ///
+    /// The table below shows what flags are checked on what OS.
+    ///
+    /// | [OS selector] | Flag(s) checked |
+    /// |---------------|-----------------|
+    /// | [epoll]       | `EPOLLRDHUP`    |
+    /// | [kqueue]      | `EV_EOF`        |
+    ///
+    /// [OS selector]: ../struct.Poll.html#implementation-notes
+    /// [epoll]: http://man7.org/linux/man-pages/man7/epoll.7.html
+    /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+    #[inline]
+    pub fn is_read_hup(&self) -> bool {
+        sys::event::is_read_hup(&self.inner)
+    }
+
+    /// Returns true if the event contains priority readiness.
+    ///
+    /// # Notes
+    ///
+    /// Method is available on all platforms, but not all platforms trigger the
+    /// priority event.
+    ///
+    /// The table below shows what flags are checked on what OS.
+    ///
+    /// | [OS selector] | Flag(s) checked |
+    /// |---------------|-----------------|
+    /// | [epoll]       | `EPOLLPRI`      |
+    /// | [kqueue]      | *Not supported* |
+    ///
+    /// [OS selector]: ../struct.Poll.html#implementation-notes
+    /// [epoll]: http://man7.org/linux/man-pages/man7/epoll.7.html
+    /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+    #[inline]
+    pub fn is_priority(&self) -> bool {
+        sys::event::is_priority(&self.inner)
+    }
+
+    /// Returns true if the event contains AIO readiness.
+    ///
+    /// # Notes
+    ///
+    /// Method is available on all platforms, but not all platforms support AIO.
+    ///
+    /// The table below shows what flags are checked on what OS.
+    ///
+    /// | [OS selector] | Flag(s) checked |
+    /// |---------------|-----------------|
+    /// | [epoll]       | *Not supported* |
+    /// | [kqueue]<sup>1</sup> | `EVFILT_AIO` |
+    ///
+    /// 1: Only supported on DragonFly BSD, FreeBSD, iOS and macOS.
+    ///
+    /// [OS selector]: ../struct.Poll.html#implementation-notes
+    /// [epoll]: http://man7.org/linux/man-pages/man7/epoll.7.html
+    /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+    #[inline]
+    pub fn is_aio(&self) -> bool {
+        sys::event::is_aio(&self.inner)
+    }
+
+    /// Returns true if the event contains LIO readiness.
+    ///
+    /// # Notes
+    ///
+    /// Method is available on all platforms, but only FreeBSD supports LIO. On
+    /// FreeBSD this method checks the `EVFILT_LIO` flag.
+    #[inline]
+    pub fn is_lio(&self) -> bool {
+        sys::event::is_lio(&self.inner)
+    }
+
+    /// Create a reference to an `Event` from a platform specific event.
+    pub(crate) fn from_sys_event_ref(sys_event: &sys::Event) -> &Event {
+        unsafe {
+            // This is safe because the memory layout of `Event` is
+            // the same as `sys::Event` due to the `repr(transparent)` attribute.
+            &*(sys_event as *const sys::Event as *const Event)
+        }
+    }
+}
+
+impl fmt::Debug for Event {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Event")
+            .field("token", &self.token())
+            .field("readable", &self.is_readable())
+            .field("writable", &self.is_writable())
+            .field("error", &self.is_error())
+            .field("hup", &self.is_hup())
+            .field("read_hup", &self.is_read_hup())
+            .field("priority", &self.is_priority())
+            .field("aio", &self.is_aio())
+            .field("lio", &self.is_lio())
+            .finish()
+    }
+}

src/event/events.rs

@@ -0,0 +1,218 @@
+use crate::event::Event;
+use crate::sys;
+
+use std::fmt;
+
+/// A collection of readiness events.
+///
+/// `Events` is passed as an argument to [`Poll::poll`] and will be used to
+/// receive any new readiness events received since the last poll. Usually, a
+/// single `Events` instance is created at the same time as a [`Poll`] and
+/// reused on each call to [`Poll::poll`].
+///
+/// See [`Poll`] for more documentation on polling.
+///
+/// [`Poll::poll`]: crate::Poll::poll
+/// [`Poll`]: crate::Poll
+///
+/// # Examples
+///
+/// ```
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Events, Poll};
+/// use std::time::Duration;
+///
+/// let mut events = Events::with_capacity(1024);
+/// let mut poll = Poll::new()?;
+///
+/// assert_eq!(0, events.iter().count());
+///
+/// // Register `event::Source`s with `poll`.
+///
+/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+///
+/// for event in &events {
+///     println!("event={:?}", event);
+/// }
+/// #     Ok(())
+/// # }
+/// ```
+pub struct Events {
+    inner: sys::Events,
+}
+
+/// [`Events`] iterator.
+///
+/// This struct is created by the [`iter`] method on [`Events`].
+///
+/// [`Events`]: crate::event::Events
+/// [`iter`]: crate::event::Events::iter
+///
+/// # Examples
+///
+/// ```
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Events, Poll};
+/// use std::time::Duration;
+///
+/// let mut events = Events::with_capacity(1024);
+/// let mut poll = Poll::new()?;
+///
+/// // Register handles with `poll`
+///
+/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+///
+/// for event in events.iter() {
+///     println!("event={:?}", event);
+/// }
+/// #     Ok(())
+/// # }
+/// ```
+#[derive(Debug, Clone)]
+pub struct Iter<'a> {
+    inner: &'a Events,
+    pos: usize,
+}
+
+impl Events {
+    /// Return a new `Events` capable of holding up to `capacity` events.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use mio::Events;
+    ///
+    /// let events = Events::with_capacity(1024);
+    ///
+    /// assert_eq!(1024, events.capacity());
+    /// ```
+    pub fn with_capacity(capacity: usize) -> Events {
+        Events {
+            inner: sys::Events::with_capacity(capacity),
+        }
+    }
+
+    /// Returns the number of `Event` values that `self` can hold.
+    ///
+    /// ```
+    /// use mio::Events;
+    ///
+    /// let events = Events::with_capacity(1024);
+    ///
+    /// assert_eq!(1024, events.capacity());
+    /// ```
+    pub fn capacity(&self) -> usize {
+        self.inner.capacity()
+    }
+
+    /// Returns `true` if `self` contains no `Event` values.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use mio::Events;
+    ///
+    /// let events = Events::with_capacity(1024);
+    ///
+    /// assert!(events.is_empty());
+    /// ```
+    pub fn is_empty(&self) -> bool {
+        self.inner.is_empty()
+    }
+
+    /// Returns an iterator over the `Event` values.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use std::error::Error;
+    /// # fn main() -> Result<(), Box<dyn Error>> {
+    /// use mio::{Events, Poll};
+    /// use std::time::Duration;
+    ///
+    /// let mut events = Events::with_capacity(1024);
+    /// let mut poll = Poll::new()?;
+    ///
+    /// // Register handles with `poll`
+    ///
+    /// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+    ///
+    /// for event in events.iter() {
+    ///     println!("event={:?}", event);
+    /// }
+    /// #     Ok(())
+    /// # }
+    /// ```
+    pub fn iter(&self) -> Iter<'_> {
+        Iter {
+            inner: self,
+            pos: 0,
+        }
+    }
+
+    /// Clearing all `Event` values from container explicitly.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use std::error::Error;
+    /// # fn main() -> Result<(), Box<dyn Error>> {
+    /// use mio::{Events, Poll};
+    /// use std::time::Duration;
+    ///
+    /// let mut events = Events::with_capacity(1024);
+    /// let mut poll = Poll::new()?;
+    ///
+    /// // Register handles with `poll`
+    /// for _ in 0..2 {
+    ///     events.clear();
+    ///     poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+    ///
+    ///     for event in events.iter() {
+    ///         println!("event={:?}", event);
+    ///     }
+    /// }
+    /// #     Ok(())
+    /// # }
+    /// ```
+    pub fn clear(&mut self) {
+        self.inner.clear();
+    }
+
+    pub(crate) fn sys(&mut self) -> &mut sys::Events {
+        &mut self.inner
+    }
+}
+
+impl<'a> IntoIterator for &'a Events {
+    type Item = &'a Event;
+    type IntoIter = Iter<'a>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
+}
+
+impl<'a> Iterator for Iter<'a> {
+    type Item = &'a Event;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let ret = self
+            .inner
+            .inner
+            .get(self.pos)
+            .map(Event::from_sys_event_ref);
+        self.pos += 1;
+        ret
+    }
+}
+
+impl fmt::Debug for Events {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Events")
+            .field("capacity", &self.capacity())
+            .finish()
+    }
+}

src/event/mod.rs

@@ -0,0 +1,10 @@
+//! Readiness event types and utilities.
+
+#[allow(clippy::module_inception)]
+mod event;
+mod events;
+mod source;
+
+pub use self::event::Event;
+pub use self::events::{Events, Iter};
+pub use self::source::Source;

src/event/source.rs

@@ -0,0 +1,126 @@
+use crate::{Interests, Registry, Token};
+
+use std::io;
+use std::ops::Deref;
+
+/// An event source that may be registered with [`Registry`].
+///
+/// Types that implement `event::Source` can be registered with
+/// `Registry`. Users of Mio **should not** use the `event::Source` trait
+/// functions directly. Instead, the equivalent functions on `Registry` should
+/// be used.
+///
+/// See [`Registry`] for more details.
+///
+/// [`Registry`]: crate::Registry
+///
+/// # Implementing `event::Source`
+///
+/// Event sources are always backed by system handles, such as sockets or other
+/// system handles. These `event::Source`s will be monitored by the system
+/// selector. An implementation of `Source` will almost always delegates to a
+/// lower level handle. Examples of this are [`TcpStream`]s, or the *unix only*
+/// [`SourceFd`].
+///
+/// [`TcpStream`]: crate::net::TcpStream
+/// [`SourceFd`]: crate::unix::SourceFd
+///
+/// # Dropping `event::Source`s
+///
+/// All `event::Source`s, unless otherwise specified, need to be [deregistered]
+/// before being dropped for them to not leak resources. This goes against the
+/// normal drop behaviour of types in Rust which cleanup after themselves, e.g.
+/// a `File` will close itself. However since deregistering needs access to
+/// [`Registry`] this cannot be done while being dropped.
+///
+/// [deregistered]: crate::Registry::deregister
+///
+/// # Examples
+///
+/// Implementing `Source` on a struct containing a socket:
+///
+/// ```
+/// use mio::{Interests, Registry, Token};
+/// use mio::event::Source;
+/// use mio::net::TcpStream;
+///
+/// use std::io;
+///
+/// # #[allow(dead_code)]
+/// pub struct MySource {
+///     socket: TcpStream,
+/// }
+///
+/// impl Source for MySource {
+///     fn register(&self, registry: &Registry, token: Token, interests: Interests)
+///         -> io::Result<()>
+///     {
+///         // Delegate the `register` call to `socket`
+///         self.socket.register(registry, token, interests)
+///     }
+///
+///     fn reregister(&self, registry: &Registry, token: Token, interests: Interests)
+///         -> io::Result<()>
+///     {
+///         // Delegate the `reregister` call to `socket`
+///         self.socket.reregister(registry, token, interests)
+///     }
+///
+///     fn deregister(&self, registry: &Registry) -> io::Result<()> {
+///         // Delegate the `deregister` call to `socket`
+///         self.socket.deregister(registry)
+///     }
+/// }
+/// ```
+pub trait Source {
+    /// Register `self` with the given `Registry` instance.
+    ///
+    /// This function should not be called directly. Use [`Registry::register`]
+    /// instead. Implementors should handle registration by delegating the call
+    /// to another `Source` type.
+    ///
+    /// [`Registry::register`]: crate::Registry::register
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()>;
+
+    /// Re-register `self` with the given `Registry` instance.
+    ///
+    /// This function should not be called directly. Use
+    /// [`Registry::reregister`] instead. Implementors should handle
+    /// re-registration by either delegating the call to another `Source` type.
+    ///
+    /// [`Registry::reregister`]: crate::Registry::reregister
+    fn reregister(&self, registry: &Registry, token: Token, interests: Interests)
+        -> io::Result<()>;
+
+    /// Deregister `self` from the given `Registry` instance.
+    ///
+    /// This function should not be called directly. Use
+    /// [`Registry::deregister`] instead. Implementors should handle
+    /// deregistration by delegating the call to another `Source` type.
+    ///
+    /// [`Registry::deregister`]: crate::Registry::deregister
+    fn deregister(&self, registry: &Registry) -> io::Result<()>;
+}
+
+impl<T, S> Source for T
+where
+    T: Deref<Target = S>,
+    S: Source + ?Sized,
+{
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()> {
+        self.deref().register(registry, token, interests)
+    }
+
+    fn reregister(
+        &self,
+        registry: &Registry,
+        token: Token,
+        interests: Interests,
+    ) -> io::Result<()> {
+        self.deref().reregister(registry, token, interests)
+    }
+
+    fn deregister(&self, registry: &Registry) -> io::Result<()> {
+        self.deref().deregister(registry)
+    }
+}

src/interests.rs

@@ -0,0 +1,165 @@
+use std::num::NonZeroU8;
+use std::{fmt, ops};
+
+/// Interests used in registering.
+///
+/// Interests are used in [registering] [`event::Source`]s with [`Poll`], they
+/// indicate what readiness should be monitored for. For example if a socket is
+/// registered with [readable] interests and the socket becomes writable, no
+/// event will be returned from a call to [`poll`].
+///
+/// The size of `Option<Interests>` should be identical to itself.
+///
+/// ```
+/// use std::mem::size_of;
+/// use mio::Interests;
+///
+/// assert_eq!(size_of::<Option<Interests>>(), size_of::<Interests>());
+/// ```
+///
+/// [registering]: crate::Registry::register
+/// [`event::Source`]: crate::event::Source
+/// [`Poll`]: crate::Poll
+/// [readable]: Interests::READABLE
+/// [`poll`]: crate::Poll::poll
+#[derive(Copy, PartialEq, Eq, Clone, PartialOrd, Ord)]
+#[repr(transparent)]
+pub struct Interests(NonZeroU8);
+
+// These must be unique.
+const READABLE: u8 = 0b0_001;
+const WRITABLE: u8 = 0b0_010;
+// The following are not available on all platforms.
+#[cfg_attr(
+    not(any(
+        target_os = "dragonfly",
+        target_os = "freebsd",
+        target_os = "ios",
+        target_os = "macos"
+    )),
+    allow(dead_code)
+)]
+const AIO: u8 = 0b0_100;
+#[cfg_attr(not(target_os = "freebsd"), allow(dead_code))]
+const LIO: u8 = 0b1_000;
+
+impl Interests {
+    /// Returns a `Interests` set representing readable interests.
+    pub const READABLE: Interests = Interests(unsafe { NonZeroU8::new_unchecked(READABLE) });
+
+    /// Returns a `Interests` set representing writable interests.
+    pub const WRITABLE: Interests = Interests(unsafe { NonZeroU8::new_unchecked(WRITABLE) });
+
+    /// Returns a `Interests` set representing AIO completion interests.
+    #[cfg(any(
+        target_os = "dragonfly",
+        target_os = "freebsd",
+        target_os = "ios",
+        target_os = "macos"
+    ))]
+    pub const AIO: Interests = Interests(unsafe { NonZeroU8::new_unchecked(AIO) });
+
+    /// Returns a `Interests` set representing LIO completion interests.
+    #[cfg(target_os = "freebsd")]
+    pub const LIO: Interests = Interests(unsafe { NonZeroU8::new_unchecked(LIO) });
+
+    /// Add together two `Interests`.
+    ///
+    /// This does the same thing as the `BitOr` implementation, but is a
+    /// constant function.
+    ///
+    /// ```
+    /// use mio::Interests;
+    ///
+    /// const INTERESTS: Interests = Interests::READABLE.add(Interests::WRITABLE);
+    /// # fn silent_dead_code_warning(_: Interests) { }
+    /// # silent_dead_code_warning(INTERESTS)
+    /// ```
+    #[allow(clippy::should_implement_trait)]
+    pub const fn add(self, other: Interests) -> Interests {
+        Interests(unsafe { NonZeroU8::new_unchecked(self.0.get() | other.0.get()) })
+    }
+
+    /// Returns true if the value includes readable readiness.
+    pub const fn is_readable(self) -> bool {
+        (self.0.get() & READABLE) != 0
+    }
+
+    /// Returns true if the value includes writable readiness.
+    pub const fn is_writable(self) -> bool {
+        (self.0.get() & WRITABLE) != 0
+    }
+
+    /// Returns true if `Interests` contains AIO readiness
+    pub const fn is_aio(self) -> bool {
+        (self.0.get() & AIO) != 0
+    }
+
+    /// Returns true if `Interests` contains LIO readiness
+    pub const fn is_lio(self) -> bool {
+        (self.0.get() & LIO) != 0
+    }
+}
+
+impl ops::BitOr for Interests {
+    type Output = Self;
+
+    #[inline]
+    fn bitor(self, other: Self) -> Self {
+        Interests(unsafe { NonZeroU8::new_unchecked(self.0.get() | other.0.get()) })
+    }
+}
+
+impl ops::BitOrAssign for Interests {
+    #[inline]
+    fn bitor_assign(&mut self, other: Self) {
+        self.0 = (*self | other).0;
+    }
+}
+
+impl fmt::Debug for Interests {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut one = false;
+        if self.is_readable() {
+            if one {
+                write!(fmt, " | ")?
+            }
+            write!(fmt, "READABLE")?;
+            one = true
+        }
+        if self.is_writable() {
+            if one {
+                write!(fmt, " | ")?
+            }
+            write!(fmt, "WRITABLE")?;
+            one = true
+        }
+        #[cfg(any(
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "ios",
+            target_os = "macos"
+        ))]
+        {
+            if self.is_aio() {
+                if one {
+                    write!(fmt, " | ")?
+                }
+                write!(fmt, "AIO")?;
+                one = true
+            }
+        }
+        #[cfg(any(target_os = "freebsd"))]
+        {
+            if self.is_lio() {
+                if one {
+                    write!(fmt, " | ")?
+                }
+                write!(fmt, "LIO")?;
+                one = true
+            }
+        }
+        debug_assert!(one, "printing empty interests");
+        Ok(())
+    }
+}

src/io.rs

@@ -1,35 +0,0 @@
-// Re-export the io::Result / Error types for convenience
-pub use std::io::{Read, Write, Result, Error, ErrorKind};
-
-// TODO: Delete this
-/// A helper trait to provide the map_non_block function on Results.
-pub trait MapNonBlock<T> {
-    /// Maps a `Result<T>` to a `Result<Option<T>>` by converting
-    /// operation-would-block errors into `Ok(None)`.
-    fn map_non_block(self) -> Result<Option<T>>;
-}
-
-impl<T> MapNonBlock<T> for Result<T> {
-    fn map_non_block(self) -> Result<Option<T>> {
-        use std::io::ErrorKind::WouldBlock;
-
-        match self {
-            Ok(value) => Ok(Some(value)),
-            Err(err) => {
-                if let WouldBlock = err.kind() {
-                    Ok(None)
-                } else {
-                    Err(err)
-                }
-            }
-        }
-    }
-}
-
-#[cfg(feature = "with-deprecated")]
-pub mod deprecated {
-    /// Returns a std `WouldBlock` error without allocating
-    pub fn would_block() -> ::std::io::Error {
-        ::std::io::ErrorKind::WouldBlock.into()
-    }
-}

src/lazycell.rs

@@ -1,554 +0,0 @@
-// Original work Copyright (c) 2014 The Rust Project Developers
-// Modified work Copyright (c) 2016-2018 Nikita Pekin and the lazycell contributors
-// See the README.md file at the top-level directory of this distribution.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-#![deny(missing_docs)]
-#![allow(unused)]
-
-//! This crate provides a `LazyCell` struct which acts as a lazily filled
-//! `Cell`.
-//!
-//! With a `RefCell`, the inner contents cannot be borrowed for the lifetime of
-//! the entire object, but only of the borrows returned. A `LazyCell` is a
-//! variation on `RefCell` which allows borrows to be tied to the lifetime of
-//! the outer object.
-//!
-//! `AtomicLazyCell` is a variant that uses an atomic variable to manage
-//! coordination in a thread-safe fashion. The limitation of an `AtomicLazyCell`
-//! is that after it is initialized, it can't be modified.
-
-use std::cell::UnsafeCell;
-use std::mem;
-use std::sync::atomic::{AtomicUsize, Ordering};
-
-/// A lazily filled `Cell`, with mutable contents.
-///
-/// A `LazyCell` is completely frozen once filled, **unless** you have `&mut`
-/// access to it, in which case `LazyCell::borrow_mut` may be used to mutate the
-/// contents.
-#[derive(Debug, Default)]
-pub struct LazyCell<T> {
-    inner: UnsafeCell<Option<T>>,
-}
-
-impl<T> LazyCell<T> {
-    /// Creates a new, empty, `LazyCell`.
-    pub fn new() -> LazyCell<T> {
-        LazyCell { inner: UnsafeCell::new(None) }
-    }
-
-    /// Put a value into this cell.
-    ///
-    /// This function will return `Err(value)` is the cell is already full.
-    pub fn fill(&self, value: T) -> Result<(), T> {
-        let slot = unsafe { &mut *self.inner.get() };
-        if slot.is_some() {
-            return Err(value);
-        }
-        *slot = Some(value);
-
-        Ok(())
-    }
-
-    /// Put a value into this cell.
-    ///
-    /// Note that this function is infallible but requires `&mut self`. By
-    /// requiring `&mut self` we're guaranteed that no active borrows to this
-    /// cell can exist so we can always fill in the value. This may not always
-    /// be usable, however, as `&mut self` may not be possible to borrow.
-    ///
-    /// # Return value
-    ///
-    /// This function returns the previous value, if any.
-    pub fn replace(&mut self, value: T) -> Option<T> {
-        mem::replace(unsafe { &mut *self.inner.get() }, Some(value))
-    }
-
-    /// Test whether this cell has been previously filled.
-    pub fn filled(&self) -> bool {
-        self.borrow().is_some()
-    }
-
-    /// Borrows the contents of this lazy cell for the duration of the cell
-    /// itself.
-    ///
-    /// This function will return `Some` if the cell has been previously
-    /// initialized, and `None` if it has not yet been initialized.
-    pub fn borrow(&self) -> Option<&T> {
-        unsafe { &*self.inner.get() }.as_ref()
-    }
-
-    /// Borrows the contents of this lazy cell mutably for the duration of the cell
-    /// itself.
-    ///
-    /// This function will return `Some` if the cell has been previously
-    /// initialized, and `None` if it has not yet been initialized.
-    pub fn borrow_mut(&mut self) -> Option<&mut T> {
-        unsafe { &mut *self.inner.get() }.as_mut()
-    }
-
-    /// Borrows the contents of this lazy cell for the duration of the cell
-    /// itself.
-    ///
-    /// If the cell has not yet been filled, the cell is first filled using the
-    /// function provided.
-    ///
-    /// # Panics
-    ///
-    /// Panics if the cell becomes filled as a side effect of `f`.
-    pub fn borrow_with<F: FnOnce() -> T>(&self, f: F) -> &T {
-        if let Some(value) = self.borrow() {
-            return value;
-        }
-        let value = f();
-        if self.fill(value).is_err() {
-            panic!("borrow_with: cell was filled by closure")
-        }
-        self.borrow().unwrap()
-    }
-
-    /// Borrows the contents of this `LazyCell` mutably for the duration of the
-    /// cell itself.
-    ///
-    /// If the cell has not yet been filled, the cell is first filled using the
-    /// function provided.
-    ///
-    /// # Panics
-    ///
-    /// Panics if the cell becomes filled as a side effect of `f`.
-    pub fn borrow_mut_with<F: FnOnce() -> T>(&mut self, f: F) -> &mut T {
-        if !self.filled() {
-            let value = f();
-            if self.fill(value).is_err() {
-                panic!("borrow_mut_with: cell was filled by closure")
-            }
-        }
-
-        self.borrow_mut().unwrap()
-    }
-
-    /// Same as `borrow_with`, but allows the initializing function to fail.
-    ///
-    /// # Panics
-    ///
-    /// Panics if the cell becomes filled as a side effect of `f`.
-    pub fn try_borrow_with<E, F>(&self, f: F) -> Result<&T, E>
-        where F: FnOnce() -> Result<T, E>
-    {
-        if let Some(value) = self.borrow() {
-            return Ok(value);
-        }
-        let value = f()?;
-        if self.fill(value).is_err() {
-            panic!("try_borrow_with: cell was filled by closure")
-        }
-        Ok(self.borrow().unwrap())
-    }
-
-    /// Same as `borrow_mut_with`, but allows the initializing function to fail.
-    ///
-    /// # Panics
-    ///
-    /// Panics if the cell becomes filled as a side effect of `f`.
-    pub fn try_borrow_mut_with<E, F>(&mut self, f: F) -> Result<&mut T, E>
-        where F: FnOnce() -> Result<T, E>
-    {
-        if self.filled() {
-            return Ok(self.borrow_mut().unwrap());
-        }
-        let value = f()?;
-        if self.fill(value).is_err() {
-            panic!("try_borrow_mut_with: cell was filled by closure")
-        }
-        Ok(self.borrow_mut().unwrap())
-    }
-
-    /// Consumes this `LazyCell`, returning the underlying value.
-    pub fn into_inner(self) -> Option<T> {
-        // Rust 1.25 changed UnsafeCell::into_inner() from unsafe to safe
-        // function. This unsafe can be removed when supporting Rust older than
-        // 1.25 is not needed.
-        #[allow(unused_unsafe)]
-        unsafe { self.inner.into_inner() }
-    }
-}
-
-impl<T: Copy> LazyCell<T> {
-    /// Returns a copy of the contents of the lazy cell.
-    ///
-    /// This function will return `Some` if the cell has been previously initialized,
-    /// and `None` if it has not yet been initialized.
-    pub fn get(&self) -> Option<T> {
-        unsafe { *self.inner.get() }
-    }
-}
-
-// Tracks the AtomicLazyCell inner state
-const NONE: usize = 0;
-const LOCK: usize = 1;
-const SOME: usize = 2;
-
-/// A lazily filled and thread-safe `Cell`, with frozen contents.
-#[derive(Debug, Default)]
-pub struct AtomicLazyCell<T> {
-    inner: UnsafeCell<Option<T>>,
-    state: AtomicUsize,
-}
-
-impl<T> AtomicLazyCell<T> {
-    /// Creates a new, empty, `AtomicLazyCell`.
-    pub fn new() -> AtomicLazyCell<T> {
-        Self {
-            inner: UnsafeCell::new(None),
-            state: AtomicUsize::new(NONE),
-        }
-    }
-
-    /// Put a value into this cell.
-    ///
-    /// This function will return `Err(value)` is the cell is already full.
-    pub fn fill(&self, t: T) -> Result<(), T> {
-        if NONE != self.state.compare_and_swap(NONE, LOCK, Ordering::Acquire) {
-            return Err(t);
-        }
-
-        unsafe { *self.inner.get() = Some(t) };
-
-        if LOCK != self.state.compare_and_swap(LOCK, SOME, Ordering::Release) {
-            panic!("unable to release lock");
-        }
-
-        Ok(())
-    }
-
-    /// Put a value into this cell.
-    ///
-    /// Note that this function is infallible but requires `&mut self`. By
-    /// requiring `&mut self` we're guaranteed that no active borrows to this
-    /// cell can exist so we can always fill in the value. This may not always
-    /// be usable, however, as `&mut self` may not be possible to borrow.
-    ///
-    /// # Return value
-    ///
-    /// This function returns the previous value, if any.
-    pub fn replace(&mut self, value: T) -> Option<T> {
-        match mem::replace(self.state.get_mut(), SOME) {
-            NONE | SOME => {}
-            _ => panic!("cell in inconsistent state"),
-        }
-        mem::replace(unsafe { &mut *self.inner.get() }, Some(value))
-    }
-
-    /// Test whether this cell has been previously filled.
-    pub fn filled(&self) -> bool {
-        self.state.load(Ordering::Acquire) == SOME
-    }
-
-    /// Borrows the contents of this lazy cell for the duration of the cell
-    /// itself.
-    ///
-    /// This function will return `Some` if the cell has been previously
-    /// initialized, and `None` if it has not yet been initialized.
-    pub fn borrow(&self) -> Option<&T> {
-        match self.state.load(Ordering::Acquire) {
-            SOME => unsafe { &*self.inner.get() }.as_ref(),
-            _ => None,
-        }
-    }
-
-    /// Consumes this `LazyCell`, returning the underlying value.
-    pub fn into_inner(self) -> Option<T> {
-        // Rust 1.25 changed UnsafeCell::into_inner() from unsafe to safe
-        // function. This unsafe can be removed when supporting Rust older than
-        // 1.25 is not needed.
-        #[allow(unused_unsafe)]
-        unsafe { self.inner.into_inner() }
-    }
-}
-
-impl<T: Copy> AtomicLazyCell<T> {
-    /// Returns a copy of the contents of the lazy cell.
-    ///
-    /// This function will return `Some` if the cell has been previously initialized,
-    /// and `None` if it has not yet been initialized.
-    pub fn get(&self) -> Option<T> {
-        match self.state.load(Ordering::Acquire) {
-            SOME => unsafe { *self.inner.get() },
-            _ => None,
-        }
-    }
-}
-
-unsafe impl<T: Sync + Send> Sync for AtomicLazyCell<T> {}
-
-unsafe impl<T: Send> Send for AtomicLazyCell<T> {}
-
-#[cfg(test)]
-mod tests {
-    use super::{AtomicLazyCell, LazyCell};
-
-    #[test]
-    fn test_borrow_from_empty() {
-        let lazycell: LazyCell<usize> = LazyCell::new();
-
-        let value = lazycell.borrow();
-        assert_eq!(value, None);
-
-        let value = lazycell.get();
-        assert_eq!(value, None);
-    }
-
-    #[test]
-    fn test_fill_and_borrow() {
-        let lazycell = LazyCell::new();
-
-        assert!(!lazycell.filled());
-        lazycell.fill(1).unwrap();
-        assert!(lazycell.filled());
-
-        let value = lazycell.borrow();
-        assert_eq!(value, Some(&1));
-
-        let value = lazycell.get();
-        assert_eq!(value, Some(1));
-    }
-
-    #[test]
-    fn test_borrow_mut() {
-        let mut lazycell = LazyCell::new();
-        assert!(lazycell.borrow_mut().is_none());
-
-        lazycell.fill(1).unwrap();
-        assert_eq!(lazycell.borrow_mut(), Some(&mut 1));
-
-        *lazycell.borrow_mut().unwrap() = 2;
-        assert_eq!(lazycell.borrow_mut(), Some(&mut 2));
-
-        // official way to reset the cell
-        lazycell = LazyCell::new();
-        assert!(lazycell.borrow_mut().is_none());
-    }
-
-    #[test]
-    fn test_already_filled_error() {
-        let lazycell = LazyCell::new();
-
-        lazycell.fill(1).unwrap();
-        assert_eq!(lazycell.fill(1), Err(1));
-    }
-
-    #[test]
-    fn test_borrow_with() {
-        let lazycell = LazyCell::new();
-
-        let value = lazycell.borrow_with(|| 1);
-        assert_eq!(&1, value);
-    }
-
-    #[test]
-    fn test_borrow_with_already_filled() {
-        let lazycell = LazyCell::new();
-        lazycell.fill(1).unwrap();
-
-        let value = lazycell.borrow_with(|| 1);
-        assert_eq!(&1, value);
-    }
-
-    #[test]
-    fn test_borrow_with_not_called_when_filled() {
-        let lazycell = LazyCell::new();
-
-        lazycell.fill(1).unwrap();
-
-        let value = lazycell.borrow_with(|| 2);
-        assert_eq!(&1, value);
-    }
-
-    #[test]
-    #[should_panic]
-    fn test_borrow_with_sound_with_reentrancy() {
-        // Kudos to dbaupp for discovering this issue
-        // https://www.reddit.com/r/rust/comments/5vs9rt/lazycell_a_rust_library_providing_a_lazilyfilled/de527xm/
-        let lazycell: LazyCell<Box<i32>> = LazyCell::new();
-
-        let mut reference: Option<&i32> = None;
-
-        lazycell.borrow_with(|| {
-            let _ = lazycell.fill(Box::new(1));
-            reference = lazycell.borrow().map(|r| &**r);
-            Box::new(2)
-        });
-    }
-
-    #[test]
-    fn test_borrow_mut_with() {
-        let mut lazycell = LazyCell::new();
-
-        {
-            let value = lazycell.borrow_mut_with(|| 1);
-            assert_eq!(&mut 1, value);
-            *value = 2;
-        }
-        assert_eq!(&2, lazycell.borrow().unwrap());
-    }
-
-    #[test]
-    fn test_borrow_mut_with_already_filled() {
-        let mut lazycell = LazyCell::new();
-        lazycell.fill(1).unwrap();
-
-        let value = lazycell.borrow_mut_with(|| 1);
-        assert_eq!(&1, value);
-    }
-
-    #[test]
-    fn test_borrow_mut_with_not_called_when_filled() {
-        let mut lazycell = LazyCell::new();
-
-        lazycell.fill(1).unwrap();
-
-        let value = lazycell.borrow_mut_with(|| 2);
-        assert_eq!(&1, value);
-    }
-
-    #[test]
-    fn test_try_borrow_with_ok() {
-        let lazycell = LazyCell::new();
-        let result = lazycell.try_borrow_with::<(), _>(|| Ok(1));
-        assert_eq!(result, Ok(&1));
-    }
-
-    #[test]
-    fn test_try_borrow_with_err() {
-        let lazycell = LazyCell::<()>::new();
-        let result = lazycell.try_borrow_with(|| Err(1));
-        assert_eq!(result, Err(1));
-    }
-
-    #[test]
-    fn test_try_borrow_with_already_filled() {
-        let lazycell = LazyCell::new();
-        lazycell.fill(1).unwrap();
-        let result = lazycell.try_borrow_with::<(), _>(|| unreachable!());
-        assert_eq!(result, Ok(&1));
-    }
-
-    #[test]
-    #[should_panic]
-    fn test_try_borrow_with_sound_with_reentrancy() {
-        let lazycell: LazyCell<Box<i32>> = LazyCell::new();
-
-        let mut reference: Option<&i32> = None;
-
-        let _ = lazycell.try_borrow_with::<(), _>(|| {
-            let _ = lazycell.fill(Box::new(1));
-            reference = lazycell.borrow().map(|r| &**r);
-            Ok(Box::new(2))
-        });
-    }
-
-    #[test]
-    fn test_try_borrow_mut_with_ok() {
-        let mut lazycell = LazyCell::new();
-        {
-            let result = lazycell.try_borrow_mut_with::<(), _>(|| Ok(1));
-            assert_eq!(result, Ok(&mut 1));
-            *result.unwrap() = 2;
-        }
-        assert_eq!(&mut 2, lazycell.borrow().unwrap());
-    }
-
-    #[test]
-    fn test_try_borrow_mut_with_err() {
-        let mut lazycell = LazyCell::<()>::new();
-        let result = lazycell.try_borrow_mut_with(|| Err(1));
-        assert_eq!(result, Err(1));
-    }
-
-    #[test]
-    fn test_try_borrow_mut_with_already_filled() {
-        let mut lazycell = LazyCell::new();
-        lazycell.fill(1).unwrap();
-        let result = lazycell.try_borrow_mut_with::<(), _>(|| unreachable!());
-        assert_eq!(result, Ok(&mut 1));
-    }
-
-    #[test]
-    fn test_into_inner() {
-        let lazycell = LazyCell::new();
-
-        lazycell.fill(1).unwrap();
-        let value = lazycell.into_inner();
-        assert_eq!(value, Some(1));
-    }
-
-    #[test]
-    fn test_atomic_borrow_from_empty() {
-        let lazycell: AtomicLazyCell<usize> = AtomicLazyCell::new();
-
-        let value = lazycell.borrow();
-        assert_eq!(value, None);
-
-        let value = lazycell.get();
-        assert_eq!(value, None);
-    }
-
-    #[test]
-    fn test_atomic_fill_and_borrow() {
-        let lazycell = AtomicLazyCell::new();
-
-        assert!(!lazycell.filled());
-        lazycell.fill(1).unwrap();
-        assert!(lazycell.filled());
-
-        let value = lazycell.borrow();
-        assert_eq!(value, Some(&1));
-
-        let value = lazycell.get();
-        assert_eq!(value, Some(1));
-    }
-
-    #[test]
-    fn test_atomic_already_filled_panic() {
-        let lazycell = AtomicLazyCell::new();
-
-        lazycell.fill(1).unwrap();
-        assert_eq!(1, lazycell.fill(1).unwrap_err());
-    }
-
-    #[test]
-    fn test_atomic_into_inner() {
-        let lazycell = AtomicLazyCell::new();
-
-        lazycell.fill(1).unwrap();
-        let value = lazycell.into_inner();
-        assert_eq!(value, Some(1));
-    }
-
-    #[test]
-    fn normal_replace() {
-        let mut cell = LazyCell::new();
-        assert_eq!(cell.fill(1), Ok(()));
-        assert_eq!(cell.replace(2), Some(1));
-        assert_eq!(cell.replace(3), Some(2));
-        assert_eq!(cell.borrow(), Some(&3));
-
-        let mut cell = LazyCell::new();
-        assert_eq!(cell.replace(2), None);
-    }
-
-    #[test]
-    fn atomic_replace() {
-        let mut cell = AtomicLazyCell::new();
-        assert_eq!(cell.fill(1), Ok(()));
-        assert_eq!(cell.replace(2), Some(1));
-        assert_eq!(cell.replace(3), Some(2));
-        assert_eq!(cell.borrow(), Some(&3));
-    }
-}

src/lib.rs

@@ -1,13 +1,9 @@
-#![doc(html_root_url = "https://docs.rs/mio/0.6.19")]
-// Mio targets old versions of the Rust compiler. In order to do this, uses
-// deprecated APIs.
-#![allow(deprecated)]
-#![deny(missing_docs, missing_debug_implementations)]
+#![doc(html_root_url = "https://docs.rs/mio/0.7.0")]
+#![deny(missing_docs, missing_debug_implementations, rust_2018_idioms)]
+// Disallow warnings when running tests.
 #![cfg_attr(test, deny(warnings))]
-
-// Many of mio's public methods violate this lint, but they can't be fixed
-// without a breaking change.
-#![cfg_attr(feature = "cargo-clippy", allow(clippy::trivially_copy_pass_by_ref))]
+// Disallow warnings in examples.
+#![doc(test(attr(deny(warnings))))]
 
 //! A fast, low-level IO library for Rust focusing on non-blocking APIs, event
 //! notification, and other useful utilities for building high performance IO
@@ -16,13 +12,14 @@
 //! # Features
 //!
 //! * Non-blocking TCP, UDP
-//! * I/O event notification queue backed by epoll, kqueue, and IOCP
+//! * I/O event queue backed by epoll, kqueue, and IOCP
 //! * Zero allocations at runtime
 //! * Platform specific extensions
 //!
 //! # Non-goals
 //!
-//! The following are specifically omitted from Mio and are left to the user or higher-level libraries.
+//! The following are specifically omitted from Mio and are left to the user or
+//! higher-level libraries.
 //!
 //! * File operations
 //! * Thread pools / multi-threaded event loop
@@ -32,21 +29,26 @@
 //!
 //! Currently supported platforms:
 //!
-//! * Linux
-//! * OS X
-//! * Windows
-//! * FreeBSD
-//! * NetBSD
 //! * Android
+//! * Bitrig
+//! * DragonFly BSD
+//! * FreeBSD
+//! * Linux
+//! * NetBSD
+//! * OpenBSD
+//! * Solaris
+//! * Windows
 //! * iOS
+//! * macOS
 //!
-//! mio can handle interfacing with each of the event notification systems of the aforementioned platforms. The details of
-//! their implementation are further discussed in [`Poll`].
+//! Mio can handle interfacing with each of the event systems of the
+//! aforementioned platforms. The details of their implementation are further
+//! discussed in [`Poll`].
 //!
 //! # Usage
 //!
-//! Using mio starts by creating a [`Poll`], which reads events from the OS and
-//! put them into [`Events`]. You can handle IO events from the OS with it.
+//! Using Mio starts by creating a [`Poll`], which reads events from the OS and
+//! puts them into [`Events`]. You can handle IO events from the OS with it.
 //!
 //! For more detail, see [`Poll`].
 //!
@@ -67,21 +69,19 @@
 //! let addr = "127.0.0.1:13265".parse().unwrap();
 //!
 //! // Setup the server socket
-//! let server = TcpListener::bind(&addr).unwrap();
+//! let server = TcpListener::bind(addr).unwrap();
 //!
 //! // Create a poll instance
-//! let poll = Poll::new().unwrap();
+//! let mut poll = Poll::new().unwrap();
 //!
 //! // Start listening for incoming connections
-//! poll.register(&server, SERVER, Ready::readable(),
-//!               PollOpt::edge()).unwrap();
+//! poll.registry().register(&server, SERVER, Interests::READABLE).unwrap();
 //!
 //! // Setup the client socket
-//! let sock = TcpStream::connect(&addr).unwrap();
+//! let sock = TcpStream::connect(addr).unwrap();
 //!
 //! // Register the socket
-//! poll.register(&sock, CLIENT, Ready::readable(),
-//!               PollOpt::edge()).unwrap();
+//! poll.registry().register(&sock, CLIENT, Interests::READABLE).unwrap();
 //!
 //! // Create storage for events
 //! let mut events = Events::with_capacity(1024);
@@ -108,204 +108,24 @@
 //!
 //! ```
 
-extern crate net2;
-extern crate iovec;
-extern crate slab;
-
-#[cfg(target_os = "fuchsia")]
-extern crate fuchsia_zircon as zircon;
-#[cfg(target_os = "fuchsia")]
-extern crate fuchsia_zircon_sys as zircon_sys;
-
-#[cfg(unix)]
-extern crate libc;
-
-#[cfg(windows)]
-extern crate miow;
-
-#[cfg(windows)]
-extern crate winapi;
-
-#[cfg(windows)]
-extern crate kernel32;
-
-#[macro_use]
-extern crate log;
-
-mod event_imp;
-mod io;
+mod interests;
 mod poll;
 mod sys;
 mod token;
-mod lazycell;
+mod waker;
 
+pub mod event;
 pub mod net;
 
-#[deprecated(since = "0.6.5", note = "use mio-extras instead")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-pub mod channel;
-
-#[deprecated(since = "0.6.5", note = "use mio-extras instead")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-pub mod timer;
-
-#[deprecated(since = "0.6.5", note = "update to use `Poll`")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-pub mod deprecated;
-
-#[deprecated(since = "0.6.5", note = "use iovec crate directly")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-pub use iovec::IoVec;
-
-#[deprecated(since = "0.6.6", note = "use net module instead")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-pub mod tcp {
-    pub use net::{TcpListener, TcpStream};
-    pub use std::net::Shutdown;
-}
-
-#[deprecated(since = "0.6.6", note = "use net module instead")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-pub mod udp;
-
-pub use poll::{
-    Poll,
-    Registration,
-    SetReadiness,
-};
-pub use event_imp::{
-    PollOpt,
-    Ready,
-};
+pub use event::Events;
+pub use interests::Interests;
+pub use poll::{Poll, Registry};
 pub use token::Token;
+pub use waker::Waker;
 
-pub mod event {
-    //! Readiness event types and utilities.
-
-    pub use super::poll::{Events, Iter};
-    pub use super::event_imp::{Event, Evented};
-}
-
-pub use event::{
-    Events,
-};
-
-#[deprecated(since = "0.6.5", note = "use events:: instead")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-pub use event::{Event, Evented};
-
-#[deprecated(since = "0.6.5", note = "use events::Iter instead")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-pub use poll::Iter as EventsIter;
-
-#[deprecated(since = "0.6.5", note = "std::io::Error can avoid the allocation now")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-pub use io::deprecated::would_block;
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
+#[cfg(unix)]
 pub mod unix {
-    //! Unix only extensions
-    pub use sys::{
-        EventedFd,
-    };
-    pub use sys::unix::UnixReady;
-}
-
-#[cfg(target_os = "fuchsia")]
-pub mod fuchsia {
-    //! Fuchsia-only extensions
-    //!
-    //! # Stability
-    //!
-    //! This module depends on the [magenta-sys crate](https://crates.io/crates/magenta-sys)
-    //! and so might introduce breaking changes, even on minor releases,
-    //! so long as that crate remains unstable.
-    pub use sys::{
-        EventedHandle,
-    };
-    pub use sys::fuchsia::{FuchsiaReady, zx_signals_t};
-}
-
-/// Windows-only extensions to the mio crate.
-///
-/// Mio on windows is currently implemented with IOCP for a high-performance
-/// implementation of asynchronous I/O. Mio then provides TCP and UDP as sample
-/// bindings for the system to connect networking types to asynchronous I/O. On
-/// Unix this scheme is then also extensible to all other file descriptors with
-/// the `EventedFd` type, but on Windows no such analog is available. The
-/// purpose of this module, however, is to similarly provide a mechanism for
-/// foreign I/O types to get hooked up into the IOCP event loop.
-///
-/// This module provides two types for interfacing with a custom IOCP handle:
-///
-/// * `Binding` - this type is intended to govern binding with mio's `Poll`
-///   type. Each I/O object should contain an instance of `Binding` that's
-///   interfaced with for the implementation of the `Evented` trait. The
-///   `register`, `reregister`, and `deregister` methods for the `Evented` trait
-///   all have rough analogs with `Binding`.
-///
-///   Note that this type **does not handle readiness**. That is, this type does
-///   not handle whether sockets are readable/writable/etc. It's intended that
-///   IOCP types will internally manage this state with a `SetReadiness` type
-///   from the `poll` module. The `SetReadiness` is typically lazily created on
-///   the first time that `Evented::register` is called and then stored in the
-///   I/O object.
-///
-///   Also note that for types which represent streams of bytes the mio
-///   interface of *readiness* doesn't map directly to the Windows model of
-///   *completion*. This means that types will have to perform internal
-///   buffering to ensure that a readiness interface can be provided. For a
-///   sample implementation see the TCP/UDP modules in mio itself.
-///
-/// * `Overlapped` - this type is intended to be used as the concrete instances
-///   of the `OVERLAPPED` type that most win32 methods expect. It's crucial, for
-///   safety, that all asynchronous operations are initiated with an instance of
-///   `Overlapped` and not another instantiation of `OVERLAPPED`.
-///
-///   Mio's `Overlapped` type is created with a function pointer that receives
-///   a `OVERLAPPED_ENTRY` type when called. This `OVERLAPPED_ENTRY` type is
-///   defined in the `winapi` crate. Whenever a completion is posted to an IOCP
-///   object the `OVERLAPPED` that was signaled will be interpreted as
-///   `Overlapped` in the mio crate and this function pointer will be invoked.
-///   Through this function pointer, and through the `OVERLAPPED` pointer,
-///   implementations can handle management of I/O events.
-///
-/// When put together these two types enable custom Windows handles to be
-/// registered with mio's event loops. The `Binding` type is used to associate
-/// handles and the `Overlapped` type is used to execute I/O operations. When
-/// the I/O operations are completed a custom function pointer is called which
-/// typically modifies a `SetReadiness` set by `Evented` methods which will get
-/// later hooked into the mio event loop.
-#[cfg(windows)]
-pub mod windows {
-
-    pub use sys::{Overlapped, Binding};
-}
-
-#[cfg(feature = "with-deprecated")]
-mod convert {
-    use std::time::Duration;
-
-    const NANOS_PER_MILLI: u32 = 1_000_000;
-    const MILLIS_PER_SEC: u64 = 1_000;
-
-    /// Convert a `Duration` to milliseconds, rounding up and saturating at
-    /// `u64::MAX`.
-    ///
-    /// The saturating is fine because `u64::MAX` milliseconds are still many
-    /// million years.
-    pub fn millis(duration: Duration) -> u64 {
-        // Round up.
-        let millis = (duration.subsec_nanos() + NANOS_PER_MILLI - 1) / NANOS_PER_MILLI;
-        duration.as_secs().saturating_mul(MILLIS_PER_SEC).saturating_add(u64::from(millis))
-    }
+    //! Unix only extensions.
+
+    pub use crate::sys::SourceFd;
 }

src/net/mod.rs

@@ -7,8 +7,11 @@
 //!
 //! [portability guidelines]: ../struct.Poll.html#portability
 
-mod tcp;
-mod udp;
+mod tcp_listener;
+pub use self::tcp_listener::TcpListener;
 
-pub use self::tcp::{TcpListener, TcpStream};
+mod tcp_stream;
+pub use self::tcp_stream::TcpStream;
+
+mod udp;
 pub use self::udp::UdpSocket;

src/net/tcp.rs

@@ -1,737 +0,0 @@
-//! Primitives for working with TCP
-//!
-//! The types provided in this module are non-blocking by default and are
-//! designed to be portable across all supported Mio platforms. As long as the
-//! [portability guidelines] are followed, the behavior should be identical no
-//! matter the target platform.
-//!
-/// [portability guidelines]: ../struct.Poll.html#portability
-
-use std::fmt;
-use std::io::{Read, Write};
-use std::net::{self, SocketAddr, SocketAddrV4, SocketAddrV6, Ipv4Addr, Ipv6Addr};
-use std::time::Duration;
-
-use net2::TcpBuilder;
-use iovec::IoVec;
-
-use {io, sys, Ready, Poll, PollOpt, Token};
-use event::Evented;
-use poll::SelectorId;
-
-/*
- *
- * ===== TcpStream =====
- *
- */
-
-/// A non-blocking TCP stream between a local socket and a remote socket.
-///
-/// The socket will be closed when the value is dropped.
-///
-/// # Examples
-///
-/// ```
-/// # use std::net::TcpListener;
-/// # use std::error::Error;
-/// #
-/// # fn try_main() -> Result<(), Box<Error>> {
-/// #     let _listener = TcpListener::bind("127.0.0.1:34254")?;
-/// use mio::{Events, Ready, Poll, PollOpt, Token};
-/// use mio::net::TcpStream;
-/// use std::time::Duration;
-///
-/// let stream = TcpStream::connect(&"127.0.0.1:34254".parse()?)?;
-///
-/// let poll = Poll::new()?;
-/// let mut events = Events::with_capacity(128);
-///
-/// // Register the socket with `Poll`
-/// poll.register(&stream, Token(0), Ready::writable(),
-///               PollOpt::edge())?;
-///
-/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
-///
-/// // The socket might be ready at this point
-/// #     Ok(())
-/// # }
-/// #
-/// # fn main() {
-/// #     try_main().unwrap();
-/// # }
-/// ```
-pub struct TcpStream {
-    sys: sys::TcpStream,
-    selector_id: SelectorId,
-}
-
-use std::net::Shutdown;
-
-// TODO: remove when fuchsia's set_nonblocking is fixed in libstd
-#[cfg(target_os = "fuchsia")]
-fn set_nonblocking(stream: &net::TcpStream) -> io::Result<()> {
-    sys::set_nonblock(
-        ::std::os::unix::io::AsRawFd::as_raw_fd(stream))
-}
-#[cfg(not(target_os = "fuchsia"))]
-fn set_nonblocking(stream: &net::TcpStream) -> io::Result<()> {
-    stream.set_nonblocking(true)
-}
-
-
-impl TcpStream {
-    /// Create a new TCP stream and issue a non-blocking connect to the
-    /// specified address.
-    ///
-    /// This convenience method is available and uses the system's default
-    /// options when creating a socket which is then connected. If fine-grained
-    /// control over the creation of the socket is desired, you can use
-    /// `net2::TcpBuilder` to configure a socket and then pass its socket to
-    /// `TcpStream::connect_stream` to transfer ownership into mio and schedule
-    /// the connect operation.
-    pub fn connect(addr: &SocketAddr) -> io::Result<TcpStream> {
-        let sock = match *addr {
-            SocketAddr::V4(..) => TcpBuilder::new_v4(),
-            SocketAddr::V6(..) => TcpBuilder::new_v6(),
-        }?;
-        // Required on Windows for a future `connect_overlapped` operation to be
-        // executed successfully.
-        if cfg!(windows) {
-            sock.bind(&inaddr_any(addr))?;
-        }
-        TcpStream::connect_stream(sock.to_tcp_stream()?, addr)
-    }
-
-    /// Creates a new `TcpStream` from the pending socket inside the given
-    /// `std::net::TcpBuilder`, connecting it to the address specified.
-    ///
-    /// This constructor allows configuring the socket before it's actually
-    /// connected, and this function will transfer ownership to the returned
-    /// `TcpStream` if successful. An unconnected `TcpStream` can be created
-    /// with the `net2::TcpBuilder` type (and also configured via that route).
-    ///
-    /// The platform specific behavior of this function looks like:
-    ///
-    /// * On Unix, the socket is placed into nonblocking mode and then a
-    ///   `connect` call is issued.
-    ///
-    /// * On Windows, the address is stored internally and the connect operation
-    ///   is issued when the returned `TcpStream` is registered with an event
-    ///   loop. Note that on Windows you must `bind` a socket before it can be
-    ///   connected, so if a custom `TcpBuilder` is used it should be bound
-    ///   (perhaps to `INADDR_ANY`) before this method is called.
-    pub fn connect_stream(stream: net::TcpStream,
-                          addr: &SocketAddr) -> io::Result<TcpStream> {
-        Ok(TcpStream {
-            sys: sys::TcpStream::connect(stream, addr)?,
-            selector_id: SelectorId::new(),
-        })
-    }
-
-    /// Creates a new `TcpStream` from a standard `net::TcpStream`.
-    ///
-    /// This function is intended to be used to wrap a TCP stream from the
-    /// standard library in the mio equivalent. The conversion here will
-    /// automatically set `stream` to nonblocking and the returned object should
-    /// be ready to get associated with an event loop.
-    ///
-    /// Note that the TCP stream here will not have `connect` called on it, so
-    /// it should already be connected via some other means (be it manually, the
-    /// net2 crate, or the standard library).
-    pub fn from_stream(stream: net::TcpStream) -> io::Result<TcpStream> {
-        set_nonblocking(&stream)?;
-
-        Ok(TcpStream {
-            sys: sys::TcpStream::from_stream(stream),
-            selector_id: SelectorId::new(),
-        })
-    }
-
-    /// Returns the socket address of the remote peer of this TCP connection.
-    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
-        self.sys.peer_addr()
-    }
-
-    /// Returns the socket address of the local half of this TCP connection.
-    pub fn local_addr(&self) -> io::Result<SocketAddr> {
-        self.sys.local_addr()
-    }
-
-    /// Creates a new independently owned handle to the underlying socket.
-    ///
-    /// The returned `TcpStream` is a reference to the same stream that this
-    /// object references. Both handles will read and write the same stream of
-    /// data, and options set on one stream will be propagated to the other
-    /// stream.
-    pub fn try_clone(&self) -> io::Result<TcpStream> {
-        self.sys.try_clone().map(|s| {
-            TcpStream {
-                sys: s,
-                selector_id: self.selector_id.clone(),
-            }
-        })
-    }
-
-    /// Shuts down the read, write, or both halves of this connection.
-    ///
-    /// This function will cause all pending and future I/O on the specified
-    /// portions to return immediately with an appropriate value (see the
-    /// documentation of `Shutdown`).
-    pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
-        self.sys.shutdown(how)
-    }
-
-    /// Sets the value of the `TCP_NODELAY` option on this socket.
-    ///
-    /// If set, this option disables the Nagle algorithm. This means that
-    /// segments are always sent as soon as possible, even if there is only a
-    /// small amount of data. When not set, data is buffered until there is a
-    /// sufficient amount to send out, thereby avoiding the frequent sending of
-    /// small packets.
-    pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
-        self.sys.set_nodelay(nodelay)
-    }
-
-    /// Gets the value of the `TCP_NODELAY` option on this socket.
-    ///
-    /// For more information about this option, see [`set_nodelay`][link].
-    ///
-    /// [link]: #method.set_nodelay
-    pub fn nodelay(&self) -> io::Result<bool> {
-        self.sys.nodelay()
-    }
-
-    /// Sets the value of the `SO_RCVBUF` option on this socket.
-    ///
-    /// Changes the size of the operating system's receive buffer associated
-    /// with the socket.
-    pub fn set_recv_buffer_size(&self, size: usize) -> io::Result<()> {
-        self.sys.set_recv_buffer_size(size)
-    }
-
-    /// Gets the value of the `SO_RCVBUF` option on this socket.
-    ///
-    /// For more information about this option, see
-    /// [`set_recv_buffer_size`][link].
-    ///
-    /// [link]: #method.set_recv_buffer_size
-    pub fn recv_buffer_size(&self) -> io::Result<usize> {
-        self.sys.recv_buffer_size()
-    }
-
-    /// Sets the value of the `SO_SNDBUF` option on this socket.
-    ///
-    /// Changes the size of the operating system's send buffer associated with
-    /// the socket.
-    pub fn set_send_buffer_size(&self, size: usize) -> io::Result<()> {
-        self.sys.set_send_buffer_size(size)
-    }
-
-    /// Gets the value of the `SO_SNDBUF` option on this socket.
-    ///
-    /// For more information about this option, see
-    /// [`set_send_buffer_size`][link].
-    ///
-    /// [link]: #method.set_send_buffer_size
-    pub fn send_buffer_size(&self) -> io::Result<usize> {
-        self.sys.send_buffer_size()
-    }
-
-    /// Sets whether keepalive messages are enabled to be sent on this socket.
-    ///
-    /// On Unix, this option will set the `SO_KEEPALIVE` as well as the
-    /// `TCP_KEEPALIVE` or `TCP_KEEPIDLE` option (depending on your platform).
-    /// On Windows, this will set the `SIO_KEEPALIVE_VALS` option.
-    ///
-    /// If `None` is specified then keepalive messages are disabled, otherwise
-    /// the duration specified will be the time to remain idle before sending a
-    /// TCP keepalive probe.
-    ///
-    /// Some platforms specify this value in seconds, so sub-second
-    /// specifications may be omitted.
-    pub fn set_keepalive(&self, keepalive: Option<Duration>) -> io::Result<()> {
-        self.sys.set_keepalive(keepalive)
-    }
-
-    /// Returns whether keepalive messages are enabled on this socket, and if so
-    /// the duration of time between them.
-    ///
-    /// For more information about this option, see [`set_keepalive`][link].
-    ///
-    /// [link]: #method.set_keepalive
-    pub fn keepalive(&self) -> io::Result<Option<Duration>> {
-        self.sys.keepalive()
-    }
-
-    /// Sets the value for the `IP_TTL` option on this socket.
-    ///
-    /// This value sets the time-to-live field that is used in every packet sent
-    /// from this socket.
-    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
-        self.sys.set_ttl(ttl)
-    }
-
-    /// Gets the value of the `IP_TTL` option for this socket.
-    ///
-    /// For more information about this option, see [`set_ttl`][link].
-    ///
-    /// [link]: #method.set_ttl
-    pub fn ttl(&self) -> io::Result<u32> {
-        self.sys.ttl()
-    }
-
-    /// Sets the value for the `IPV6_V6ONLY` option on this socket.
-    ///
-    /// If this is set to `true` then the socket is restricted to sending and
-    /// receiving IPv6 packets only. In this case two IPv4 and IPv6 applications
-    /// can bind the same port at the same time.
-    ///
-    /// If this is set to `false` then the socket can be used to send and
-    /// receive packets from an IPv4-mapped IPv6 address.
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.sys.set_only_v6(only_v6)
-    }
-
-    /// Gets the value of the `IPV6_V6ONLY` option for this socket.
-    ///
-    /// For more information about this option, see [`set_only_v6`][link].
-    ///
-    /// [link]: #method.set_only_v6
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.sys.only_v6()
-    }
-
-    /// Sets the value for the `SO_LINGER` option on this socket.
-    pub fn set_linger(&self, dur: Option<Duration>) -> io::Result<()> {
-        self.sys.set_linger(dur)
-    }
-
-    /// Gets the value of the `SO_LINGER` option on this socket.
-    ///
-    /// For more information about this option, see [`set_linger`][link].
-    ///
-    /// [link]: #method.set_linger
-    pub fn linger(&self) -> io::Result<Option<Duration>> {
-        self.sys.linger()
-    }
-
-    #[deprecated(since = "0.6.9", note = "use set_keepalive")]
-    #[cfg(feature = "with-deprecated")]
-    #[doc(hidden)]
-    pub fn set_keepalive_ms(&self, keepalive: Option<u32>) -> io::Result<()> {
-        self.set_keepalive(keepalive.map(|v| {
-            Duration::from_millis(u64::from(v))
-        }))
-    }
-
-    #[deprecated(since = "0.6.9", note = "use keepalive")]
-    #[cfg(feature = "with-deprecated")]
-    #[doc(hidden)]
-    pub fn keepalive_ms(&self) -> io::Result<Option<u32>> {
-        self.keepalive().map(|v| {
-            v.map(|v| {
-                ::convert::millis(v) as u32
-            })
-        })
-    }
-
-    /// Get the value of the `SO_ERROR` option on this socket.
-    ///
-    /// This will retrieve the stored error in the underlying socket, clearing
-    /// the field in the process. This can be useful for checking errors between
-    /// calls.
-    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        self.sys.take_error()
-    }
-
-    /// Receives data on the socket from the remote address to which it is
-    /// connected, without removing that data from the queue. On success,
-    /// returns the number of bytes peeked.
-    ///
-    /// Successive calls return the same data. This is accomplished by passing
-    /// `MSG_PEEK` as a flag to the underlying recv system call.
-    pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
-        self.sys.peek(buf)
-    }
-
-    /// Read in a list of buffers all at once.
-    ///
-    /// This operation will attempt to read bytes from this socket and place
-    /// them into the list of buffers provided. Note that each buffer is an
-    /// `IoVec` which can be created from a byte slice.
-    ///
-    /// The buffers provided will be filled in sequentially. A buffer will be
-    /// entirely filled up before the next is written to.
-    ///
-    /// The number of bytes read is returned, if successful, or an error is
-    /// returned otherwise. If no bytes are available to be read yet then
-    /// a "would block" error is returned. This operation does not block.
-    ///
-    /// On Unix this corresponds to the `readv` syscall.
-    pub fn read_bufs(&self, bufs: &mut [&mut IoVec]) -> io::Result<usize> {
-        self.sys.readv(bufs)
-    }
-
-    /// Write a list of buffers all at once.
-    ///
-    /// This operation will attempt to write a list of byte buffers to this
-    /// socket. Note that each buffer is an `IoVec` which can be created from a
-    /// byte slice.
-    ///
-    /// The buffers provided will be written sequentially. A buffer will be
-    /// entirely written before the next is written.
-    ///
-    /// The number of bytes written is returned, if successful, or an error is
-    /// returned otherwise. If the socket is not currently writable then a
-    /// "would block" error is returned. This operation does not block.
-    ///
-    /// On Unix this corresponds to the `writev` syscall.
-    pub fn write_bufs(&self, bufs: &[&IoVec]) -> io::Result<usize> {
-        self.sys.writev(bufs)
-    }
-}
-
-fn inaddr_any(other: &SocketAddr) -> SocketAddr {
-    match *other {
-        SocketAddr::V4(..) => {
-            let any = Ipv4Addr::new(0, 0, 0, 0);
-            let addr = SocketAddrV4::new(any, 0);
-            SocketAddr::V4(addr)
-        }
-        SocketAddr::V6(..) => {
-            let any = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0);
-            let addr = SocketAddrV6::new(any, 0, 0, 0);
-            SocketAddr::V6(addr)
-        }
-    }
-}
-
-impl Read for TcpStream {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        (&self.sys).read(buf)
-    }
-}
-
-impl<'a> Read for &'a TcpStream {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        (&self.sys).read(buf)
-    }
-}
-
-impl Write for TcpStream {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        (&self.sys).write(buf)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        (&self.sys).flush()
-    }
-}
-
-impl<'a> Write for &'a TcpStream {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        (&self.sys).write(buf)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        (&self.sys).flush()
-    }
-}
-
-impl Evented for TcpStream {
-    fn register(&self, poll: &Poll, token: Token,
-                interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.selector_id.associate_selector(poll)?;
-        self.sys.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token,
-                  interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.sys.deregister(poll)
-    }
-}
-
-impl fmt::Debug for TcpStream {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Debug::fmt(&self.sys, f)
-    }
-}
-
-/*
- *
- * ===== TcpListener =====
- *
- */
-
-/// A structure representing a socket server
-///
-/// # Examples
-///
-/// ```
-/// # use std::error::Error;
-/// # fn try_main() -> Result<(), Box<Error>> {
-/// use mio::{Events, Ready, Poll, PollOpt, Token};
-/// use mio::net::TcpListener;
-/// use std::time::Duration;
-///
-/// let listener = TcpListener::bind(&"127.0.0.1:34255".parse()?)?;
-///
-/// let poll = Poll::new()?;
-/// let mut events = Events::with_capacity(128);
-///
-/// // Register the socket with `Poll`
-/// poll.register(&listener, Token(0), Ready::readable(),
-///               PollOpt::edge())?;
-///
-/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
-///
-/// // There may be a socket ready to be accepted
-/// #     Ok(())
-/// # }
-/// #
-/// # fn main() {
-/// #     try_main().unwrap();
-/// # }
-/// ```
-pub struct TcpListener {
-    sys: sys::TcpListener,
-    selector_id: SelectorId,
-}
-
-impl TcpListener {
-    /// Convenience method to bind a new TCP listener to the specified address
-    /// to receive new connections.
-    ///
-    /// This function will take the following steps:
-    ///
-    /// 1. Create a new TCP socket.
-    /// 2. Set the `SO_REUSEADDR` option on the socket.
-    /// 3. Bind the socket to the specified address.
-    /// 4. Call `listen` on the socket to prepare it to receive new connections.
-    ///
-    /// If fine-grained control over the binding and listening process for a
-    /// socket is desired then the `net2::TcpBuilder` methods can be used in
-    /// combination with the `TcpListener::from_listener` method to transfer
-    /// ownership into mio.
-    pub fn bind(addr: &SocketAddr) -> io::Result<TcpListener> {
-        // Create the socket
-        let sock = match *addr {
-            SocketAddr::V4(..) => TcpBuilder::new_v4(),
-            SocketAddr::V6(..) => TcpBuilder::new_v6(),
-        }?;
-
-        // Set SO_REUSEADDR, but only on Unix (mirrors what libstd does)
-        if cfg!(unix) {
-            sock.reuse_address(true)?;
-        }
-
-        // Bind the socket
-        sock.bind(addr)?;
-
-        // listen
-        let listener = sock.listen(1024)?;
-        Ok(TcpListener {
-            sys: sys::TcpListener::new(listener)?,
-            selector_id: SelectorId::new(),
-        })
-    }
-
-    #[deprecated(since = "0.6.13", note = "use from_std instead")]
-    #[cfg(feature = "with-deprecated")]
-    #[doc(hidden)]
-    pub fn from_listener(listener: net::TcpListener, _: &SocketAddr)
-                         -> io::Result<TcpListener> {
-        TcpListener::from_std(listener)
-    }
-
-    /// Creates a new `TcpListener` from an instance of a
-    /// `std::net::TcpListener` type.
-    ///
-    /// This function will set the `listener` provided into nonblocking mode on
-    /// Unix, and otherwise the stream will just be wrapped up in an mio stream
-    /// ready to accept new connections and become associated with an event
-    /// loop.
-    ///
-    /// The address provided must be the address that the listener is bound to.
-    pub fn from_std(listener: net::TcpListener) -> io::Result<TcpListener> {
-        sys::TcpListener::new(listener).map(|s| {
-            TcpListener {
-                sys: s,
-                selector_id: SelectorId::new(),
-            }
-        })
-    }
-
-    /// Accepts a new `TcpStream`.
-    ///
-    /// This may return an `Err(e)` where `e.kind()` is
-    /// `io::ErrorKind::WouldBlock`. This means a stream may be ready at a later
-    /// point and one should wait for a notification before calling `accept`
-    /// again.
-    ///
-    /// If an accepted stream is returned, the remote address of the peer is
-    /// returned along with it.
-    pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
-        let (s, a) = try!(self.accept_std());
-        Ok((TcpStream::from_stream(s)?, a))
-    }
-
-    /// Accepts a new `std::net::TcpStream`.
-    ///
-    /// This method is the same as `accept`, except that it returns a TCP socket
-    /// *in blocking mode* which isn't bound to `mio`. This can be later then
-    /// converted to a `mio` type, if necessary.
-    pub fn accept_std(&self) -> io::Result<(net::TcpStream, SocketAddr)> {
-        self.sys.accept()
-    }
-
-    /// Returns the local socket address of this listener.
-    pub fn local_addr(&self) -> io::Result<SocketAddr> {
-        self.sys.local_addr()
-    }
-
-    /// Creates a new independently owned handle to the underlying socket.
-    ///
-    /// The returned `TcpListener` is a reference to the same socket that this
-    /// object references. Both handles can be used to accept incoming
-    /// connections and options set on one listener will affect the other.
-    pub fn try_clone(&self) -> io::Result<TcpListener> {
-        self.sys.try_clone().map(|s| {
-            TcpListener {
-                sys: s,
-                selector_id: self.selector_id.clone(),
-            }
-        })
-    }
-
-    /// Sets the value for the `IP_TTL` option on this socket.
-    ///
-    /// This value sets the time-to-live field that is used in every packet sent
-    /// from this socket.
-    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
-        self.sys.set_ttl(ttl)
-    }
-
-    /// Gets the value of the `IP_TTL` option for this socket.
-    ///
-    /// For more information about this option, see [`set_ttl`][link].
-    ///
-    /// [link]: #method.set_ttl
-    pub fn ttl(&self) -> io::Result<u32> {
-        self.sys.ttl()
-    }
-
-    /// Sets the value for the `IPV6_V6ONLY` option on this socket.
-    ///
-    /// If this is set to `true` then the socket is restricted to sending and
-    /// receiving IPv6 packets only. In this case two IPv4 and IPv6 applications
-    /// can bind the same port at the same time.
-    ///
-    /// If this is set to `false` then the socket can be used to send and
-    /// receive packets from an IPv4-mapped IPv6 address.
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.sys.set_only_v6(only_v6)
-    }
-
-    /// Gets the value of the `IPV6_V6ONLY` option for this socket.
-    ///
-    /// For more information about this option, see [`set_only_v6`][link].
-    ///
-    /// [link]: #method.set_only_v6
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.sys.only_v6()
-    }
-
-    /// Get the value of the `SO_ERROR` option on this socket.
-    ///
-    /// This will retrieve the stored error in the underlying socket, clearing
-    /// the field in the process. This can be useful for checking errors between
-    /// calls.
-    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        self.sys.take_error()
-    }
-}
-
-impl Evented for TcpListener {
-    fn register(&self, poll: &Poll, token: Token,
-                interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.selector_id.associate_selector(poll)?;
-        self.sys.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token,
-                  interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.sys.deregister(poll)
-    }
-}
-
-impl fmt::Debug for TcpListener {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Debug::fmt(&self.sys, f)
-    }
-}
-
-/*
- *
- * ===== UNIX ext =====
- *
- */
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-use std::os::unix::io::{IntoRawFd, AsRawFd, FromRawFd, RawFd};
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-impl IntoRawFd for TcpStream {
-    fn into_raw_fd(self) -> RawFd {
-        self.sys.into_raw_fd()
-    }
-}
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-impl AsRawFd for TcpStream {
-    fn as_raw_fd(&self) -> RawFd {
-        self.sys.as_raw_fd()
-    }
-}
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-impl FromRawFd for TcpStream {
-    unsafe fn from_raw_fd(fd: RawFd) -> TcpStream {
-        TcpStream {
-            sys: FromRawFd::from_raw_fd(fd),
-            selector_id: SelectorId::new(),
-        }
-    }
-}
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-impl IntoRawFd for TcpListener {
-    fn into_raw_fd(self) -> RawFd {
-        self.sys.into_raw_fd()
-    }
-}
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-impl AsRawFd for TcpListener {
-    fn as_raw_fd(&self) -> RawFd {
-        self.sys.as_raw_fd()
-    }
-}
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-impl FromRawFd for TcpListener {
-    unsafe fn from_raw_fd(fd: RawFd) -> TcpListener {
-        TcpListener {
-            sys: FromRawFd::from_raw_fd(fd),
-            selector_id: SelectorId::new(),
-        }
-    }
-}

src/net/tcp_listener.rs

@@ -0,0 +1,170 @@
+use super::TcpStream;
+#[cfg(debug_assertions)]
+use crate::poll::SelectorId;
+use crate::{event, sys, Interests, Registry, Token};
+
+use std::fmt;
+use std::io;
+use std::net::SocketAddr;
+#[cfg(unix)]
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+
+/// A structure representing a socket server
+///
+/// # Examples
+///
+/// ```
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Events, Interests, Poll, Token};
+/// use mio::net::TcpListener;
+/// use std::time::Duration;
+///
+/// let listener = TcpListener::bind("127.0.0.1:34255".parse()?)?;
+///
+/// let mut poll = Poll::new()?;
+/// let mut events = Events::with_capacity(128);
+///
+/// // Register the socket with `Poll`
+/// poll.registry().register(&listener, Token(0), Interests::READABLE)?;
+///
+/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+///
+/// // There may be a socket ready to be accepted
+/// #     Ok(())
+/// # }
+/// ```
+pub struct TcpListener {
+    sys: sys::TcpListener,
+    #[cfg(debug_assertions)]
+    selector_id: SelectorId,
+}
+
+impl TcpListener {
+    /// Convenience method to bind a new TCP listener to the specified address
+    /// to receive new connections.
+    ///
+    /// This function will take the following steps:
+    ///
+    /// 1. Create a new TCP socket.
+    /// 2. Set the `SO_REUSEADDR` option on the socket on Unix.
+    /// 3. Bind the socket to the specified address.
+    /// 4. Calls `listen` on the socket to prepare it to receive new connections.
+    pub fn bind(addr: SocketAddr) -> io::Result<TcpListener> {
+        sys::TcpListener::bind(addr).map(|sys| TcpListener {
+            sys,
+            #[cfg(debug_assertions)]
+            selector_id: SelectorId::new(),
+        })
+    }
+
+    /// Accepts a new `TcpStream`.
+    ///
+    /// This may return an `Err(e)` where `e.kind()` is
+    /// `io::ErrorKind::WouldBlock`. This means a stream may be ready at a later
+    /// point and one should wait for an event before calling `accept` again.
+    ///
+    /// If an accepted stream is returned, the remote address of the peer is
+    /// returned along with it.
+    pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
+        self.sys
+            .accept()
+            .map(|(sys, addr)| (TcpStream::new(sys), addr))
+    }
+
+    /// Returns the local socket address of this listener.
+    pub fn local_addr(&self) -> io::Result<SocketAddr> {
+        self.sys.local_addr()
+    }
+
+    /// Creates a new independently owned handle to the underlying socket.
+    ///
+    /// The returned `TcpListener` is a reference to the same socket that this
+    /// object references. Both handles can be used to accept incoming
+    /// connections and options set on one listener will affect the other.
+    pub fn try_clone(&self) -> io::Result<TcpListener> {
+        self.sys.try_clone().map(|s| TcpListener {
+            sys: s,
+            #[cfg(debug_assertions)]
+            selector_id: self.selector_id.clone(),
+        })
+    }
+
+    /// Sets the value for the `IP_TTL` option on this socket.
+    ///
+    /// This value sets the time-to-live field that is used in every packet sent
+    /// from this socket.
+    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
+        self.sys.set_ttl(ttl)
+    }
+
+    /// Gets the value of the `IP_TTL` option for this socket.
+    ///
+    /// For more information about this option, see [`set_ttl`][link].
+    ///
+    /// [link]: #method.set_ttl
+    pub fn ttl(&self) -> io::Result<u32> {
+        self.sys.ttl()
+    }
+
+    /// Get the value of the `SO_ERROR` option on this socket.
+    ///
+    /// This will retrieve the stored error in the underlying socket, clearing
+    /// the field in the process. This can be useful for checking errors between
+    /// calls.
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.sys.take_error()
+    }
+}
+
+impl event::Source for TcpListener {
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()> {
+        #[cfg(debug_assertions)]
+        self.selector_id.associate_selector(registry)?;
+        self.sys.register(registry, token, interests)
+    }
+
+    fn reregister(
+        &self,
+        registry: &Registry,
+        token: Token,
+        interests: Interests,
+    ) -> io::Result<()> {
+        self.sys.reregister(registry, token, interests)
+    }
+
+    fn deregister(&self, registry: &Registry) -> io::Result<()> {
+        self.sys.deregister(registry)
+    }
+}
+
+impl fmt::Debug for TcpListener {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Debug::fmt(&self.sys, f)
+    }
+}
+
+#[cfg(unix)]
+impl IntoRawFd for TcpListener {
+    fn into_raw_fd(self) -> RawFd {
+        self.sys.into_raw_fd()
+    }
+}
+
+#[cfg(unix)]
+impl AsRawFd for TcpListener {
+    fn as_raw_fd(&self) -> RawFd {
+        self.sys.as_raw_fd()
+    }
+}
+
+#[cfg(unix)]
+impl FromRawFd for TcpListener {
+    unsafe fn from_raw_fd(fd: RawFd) -> TcpListener {
+        TcpListener {
+            sys: FromRawFd::from_raw_fd(fd),
+            #[cfg(debug_assertions)]
+            selector_id: SelectorId::new(),
+        }
+    }
+}

src/net/tcp_stream.rs

@@ -0,0 +1,256 @@
+use std::fmt;
+use std::io::{self, IoSlice, IoSliceMut, Read, Write};
+use std::net::SocketAddr;
+#[cfg(unix)]
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+
+#[cfg(debug_assertions)]
+use crate::poll::SelectorId;
+use crate::{event, sys, Interests, Registry, Token};
+
+/// A non-blocking TCP stream between a local socket and a remote socket.
+///
+/// The socket will be closed when the value is dropped.
+///
+/// # Examples
+///
+/// ```
+/// # use std::net::TcpListener;
+/// # use std::error::Error;
+/// #
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// #     let _listener = TcpListener::bind("127.0.0.1:34254")?;
+/// use mio::{Events, Interests, Poll, Token};
+/// use mio::net::TcpStream;
+/// use std::time::Duration;
+///
+/// let stream = TcpStream::connect("127.0.0.1:34254".parse()?)?;
+///
+/// let mut poll = Poll::new()?;
+/// let mut events = Events::with_capacity(128);
+///
+/// // Register the socket with `Poll`
+/// poll.registry().register(&stream, Token(0), Interests::WRITABLE)?;
+///
+/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+///
+/// // The socket might be ready at this point
+/// #     Ok(())
+/// # }
+/// ```
+pub struct TcpStream {
+    sys: sys::TcpStream,
+    #[cfg(debug_assertions)]
+    selector_id: SelectorId,
+}
+
+use std::net::Shutdown;
+
+impl TcpStream {
+    pub(crate) fn new(sys: sys::TcpStream) -> TcpStream {
+        TcpStream {
+            sys,
+            #[cfg(debug_assertions)]
+            selector_id: SelectorId::new(),
+        }
+    }
+
+    /// Create a new TCP stream and issue a non-blocking connect to the
+    /// specified address.
+    pub fn connect(addr: SocketAddr) -> io::Result<TcpStream> {
+        sys::TcpStream::connect(addr).map(|sys| TcpStream {
+            sys,
+            #[cfg(debug_assertions)]
+            selector_id: SelectorId::new(),
+        })
+    }
+
+    /// Returns the socket address of the remote peer of this TCP connection.
+    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+        self.sys.peer_addr()
+    }
+
+    /// Returns the socket address of the local half of this TCP connection.
+    pub fn local_addr(&self) -> io::Result<SocketAddr> {
+        self.sys.local_addr()
+    }
+
+    /// Creates a new independently owned handle to the underlying socket.
+    ///
+    /// The returned `TcpStream` is a reference to the same stream that this
+    /// object references. Both handles will read and write the same stream of
+    /// data, and options set on one stream will be propagated to the other
+    /// stream.
+    pub fn try_clone(&self) -> io::Result<TcpStream> {
+        self.sys.try_clone().map(|s| TcpStream {
+            sys: s,
+            #[cfg(debug_assertions)]
+            selector_id: self.selector_id.clone(),
+        })
+    }
+
+    /// Shuts down the read, write, or both halves of this connection.
+    ///
+    /// This function will cause all pending and future I/O on the specified
+    /// portions to return immediately with an appropriate value (see the
+    /// documentation of `Shutdown`).
+    pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
+        self.sys.shutdown(how)
+    }
+
+    /// Sets the value of the `TCP_NODELAY` option on this socket.
+    ///
+    /// If set, this option disables the Nagle algorithm. This means that
+    /// segments are always sent as soon as possible, even if there is only a
+    /// small amount of data. When not set, data is buffered until there is a
+    /// sufficient amount to send out, thereby avoiding the frequent sending of
+    /// small packets.
+    pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
+        self.sys.set_nodelay(nodelay)
+    }
+
+    /// Gets the value of the `TCP_NODELAY` option on this socket.
+    ///
+    /// For more information about this option, see [`set_nodelay`][link].
+    ///
+    /// [link]: #method.set_nodelay
+    pub fn nodelay(&self) -> io::Result<bool> {
+        self.sys.nodelay()
+    }
+
+    /// Sets the value for the `IP_TTL` option on this socket.
+    ///
+    /// This value sets the time-to-live field that is used in every packet sent
+    /// from this socket.
+    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
+        self.sys.set_ttl(ttl)
+    }
+
+    /// Gets the value of the `IP_TTL` option for this socket.
+    ///
+    /// For more information about this option, see [`set_ttl`][link].
+    ///
+    /// [link]: #method.set_ttl
+    pub fn ttl(&self) -> io::Result<u32> {
+        self.sys.ttl()
+    }
+
+    /// Get the value of the `SO_ERROR` option on this socket.
+    ///
+    /// This will retrieve the stored error in the underlying socket, clearing
+    /// the field in the process. This can be useful for checking errors between
+    /// calls.
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.sys.take_error()
+    }
+
+    /// Receives data on the socket from the remote address to which it is
+    /// connected, without removing that data from the queue. On success,
+    /// returns the number of bytes peeked.
+    ///
+    /// Successive calls return the same data. This is accomplished by passing
+    /// `MSG_PEEK` as a flag to the underlying recv system call.
+    pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
+        self.sys.peek(buf)
+    }
+}
+
+impl Read for TcpStream {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        (&self.sys).read(buf)
+    }
+
+    fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+        (&self.sys).read_vectored(bufs)
+    }
+}
+
+impl<'a> Read for &'a TcpStream {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        (&self.sys).read(buf)
+    }
+
+    fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+        (&self.sys).read_vectored(bufs)
+    }
+}
+
+impl Write for TcpStream {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        (&self.sys).write(buf)
+    }
+
+    fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+        (&self.sys).write_vectored(bufs)
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        (&self.sys).flush()
+    }
+}
+
+impl<'a> Write for &'a TcpStream {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        (&self.sys).write(buf)
+    }
+
+    fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+        (&self.sys).write_vectored(bufs)
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        (&self.sys).flush()
+    }
+}
+
+impl event::Source for TcpStream {
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()> {
+        #[cfg(debug_assertions)]
+        self.selector_id.associate_selector(registry)?;
+        self.sys.register(registry, token, interests)
+    }
+
+    fn reregister(
+        &self,
+        registry: &Registry,
+        token: Token,
+        interests: Interests,
+    ) -> io::Result<()> {
+        self.sys.reregister(registry, token, interests)
+    }
+
+    fn deregister(&self, registry: &Registry) -> io::Result<()> {
+        self.sys.deregister(registry)
+    }
+}
+
+impl fmt::Debug for TcpStream {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Debug::fmt(&self.sys, f)
+    }
+}
+
+#[cfg(unix)]
+impl IntoRawFd for TcpStream {
+    fn into_raw_fd(self) -> RawFd {
+        self.sys.into_raw_fd()
+    }
+}
+
+#[cfg(unix)]
+impl AsRawFd for TcpStream {
+    fn as_raw_fd(&self) -> RawFd {
+        self.sys.as_raw_fd()
+    }
+}
+
+#[cfg(unix)]
+impl FromRawFd for TcpStream {
+    unsafe fn from_raw_fd(fd: RawFd) -> TcpStream {
+        TcpStream {
+            sys: FromRawFd::from_raw_fd(fd),
+            #[cfg(debug_assertions)]
+            selector_id: SelectorId::new(),
+        }
+    }
+}

src/net/udp.rs

@@ -1,20 +1,21 @@
-//! Primitives for working with UDP
+//! Primitives for working with UDP.
 //!
 //! The types provided in this module are non-blocking by default and are
 //! designed to be portable across all supported Mio platforms. As long as the
 //! [portability guidelines] are followed, the behavior should be identical no
 //! matter the target platform.
 //!
-/// [portability guidelines]: ../struct.Poll.html#portability
+//! [portability guidelines]: ../struct.Poll.html#portability
+
+#[cfg(debug_assertions)]
+use crate::poll::SelectorId;
+use crate::{event, sys, Interests, Registry, Token};
 
-use {io, sys, Ready, Poll, PollOpt, Token};
-use event::Evented;
-use poll::SelectorId;
 use std::fmt;
-use std::net::{self, Ipv4Addr, Ipv6Addr, SocketAddr};
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-use iovec::IoVec;
+use std::io;
+use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr};
+#[cfg(unix)]
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
 
 /// A User Datagram Protocol socket.
 ///
@@ -27,13 +28,13 @@ use iovec::IoVec;
 /// ```
 /// # use std::error::Error;
 /// #
-/// # fn try_main() -> Result<(), Box<Error>> {
+/// # fn main() -> Result<(), Box<dyn Error>> {
 /// // An Echo program:
 /// // SENDER -> sends a message.
 /// // ECHOER -> listens and prints the message received.
 ///
 /// use mio::net::UdpSocket;
-/// use mio::{Events, Ready, Poll, PollOpt, Token};
+/// use mio::{Events, Interests, Poll, Token};
 /// use std::time::Duration;
 ///
 /// const SENDER: Token = Token(0);
@@ -41,8 +42,8 @@ use iovec::IoVec;
 ///
 /// // This operation will fail if the address is in use, so we select different ports for each
 /// // socket.
-/// let sender_socket = UdpSocket::bind(&"127.0.0.1:0".parse()?)?;
-/// let echoer_socket = UdpSocket::bind(&"127.0.0.1:0".parse()?)?;
+/// let sender_socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+/// let echoer_socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
 ///
 /// // If we do not use connect here, SENDER and ECHOER would need to call send_to and recv_from
 /// // respectively.
@@ -50,11 +51,11 @@ use iovec::IoVec;
 ///
 /// // We need a Poll to check if SENDER is ready to be written into, and if ECHOER is ready to be
 /// // read from.
-/// let poll = Poll::new()?;
+/// let mut poll = Poll::new()?;
 ///
 /// // We register our sockets here so that we can check if they are ready to be written/read.
-/// poll.register(&sender_socket, SENDER, Ready::writable(), PollOpt::edge())?;
-/// poll.register(&echoer_socket, ECHOER, Ready::readable(), PollOpt::edge())?;
+/// poll.registry().register(&sender_socket, SENDER, Interests::WRITABLE)?;
+/// poll.registry().register(&echoer_socket, ECHOER, Interests::READABLE)?;
 ///
 /// let msg_to_send = [9; 9];
 /// let mut buffer = [0; 9];
@@ -75,22 +76,18 @@ use iovec::IoVec;
 ///                 let num_recv = echoer_socket.recv(&mut buffer)?;
 ///                 println!("echo {:?} -> {:?}", buffer, num_recv);
 ///                 buffer = [0; 9];
+///                 # drop(buffer); // Silence unused assignment warning.
 ///                 # return Ok(());
 ///             }
 ///             _ => unreachable!()
 ///         }
 ///     }
 /// }
-/// #
-/// #   Ok(())
-/// # }
-/// #
-/// # fn main() {
-/// #   try_main().unwrap();
 /// # }
 /// ```
 pub struct UdpSocket {
     sys: sys::UdpSocket,
+    #[cfg(debug_assertions)]
     selector_id: SelectorId,
 }
 
@@ -102,11 +99,11 @@ impl UdpSocket {
     /// ```
     /// # use std::error::Error;
     /// #
-    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// # fn main() -> Result<(), Box<dyn Error>> {
     /// use mio::net::UdpSocket;
     ///
     /// // We must bind it to an open address.
-    /// let socket = match UdpSocket::bind(&"127.0.0.1:0".parse()?) {
+    /// let socket = match UdpSocket::bind("127.0.0.1:0".parse()?) {
     ///     Ok(new_socket) => new_socket,
     ///     Err(fail) => {
     ///         // We panic! here, but you could try to bind it again on another address.
@@ -115,31 +112,14 @@ impl UdpSocket {
     /// };
     ///
     /// // Our socket was created, but we should not use it before checking it's readiness.
+    /// #    drop(socket); // Silence unused variable warning.
     /// #    Ok(())
     /// # }
-    /// #
-    /// # fn main() {
-    /// #   try_main().unwrap();
-    /// # }
     /// ```
-    pub fn bind(addr: &SocketAddr) -> io::Result<UdpSocket> {
-        let socket = net::UdpSocket::bind(addr)?;
-        UdpSocket::from_socket(socket)
-    }
-
-    /// Creates a new mio-wrapped socket from an underlying and bound std
-    /// socket.
-    ///
-    /// This function requires that `socket` has previously been bound to an
-    /// address to work correctly, and returns an I/O object which can be used
-    /// with mio to send/receive UDP messages.
-    ///
-    /// This can be used in conjunction with net2's `UdpBuilder` interface to
-    /// configure a socket before it's handed off to mio, such as setting
-    /// options like `reuse_address` or binding to multiple addresses.
-    pub fn from_socket(socket: net::UdpSocket) -> io::Result<UdpSocket> {
-        Ok(UdpSocket {
-            sys: sys::UdpSocket::new(socket)?,
+    pub fn bind(addr: SocketAddr) -> io::Result<UdpSocket> {
+        sys::UdpSocket::bind(addr).map(|sys| UdpSocket {
+            sys,
+            #[cfg(debug_assertions)]
             selector_id: SelectorId::new(),
         })
     }
@@ -155,17 +135,14 @@ impl UdpSocket {
     #[cfg_attr(target_os = "freebsd", doc = " ```no_run")]
     /// # use std::error::Error;
     /// #
-    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// # fn main() -> Result<(), Box<dyn Error>> {
     /// use mio::net::UdpSocket;
     ///
     /// let addr = "127.0.0.1:0".parse()?;
-    /// let socket = UdpSocket::bind(&addr)?;
+    /// let socket = UdpSocket::bind(addr)?;
+    /// assert_eq!(socket.local_addr()?.ip(), addr.ip());
     /// #    Ok(())
     /// # }
-    /// #
-    /// # fn main() {
-    /// #   try_main().unwrap();
-    /// # }
     /// ```
     pub fn local_addr(&self) -> io::Result<SocketAddr> {
         self.sys.local_addr()
@@ -182,30 +159,24 @@ impl UdpSocket {
     /// ```
     /// # use std::error::Error;
     /// #
-    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// # fn main() -> Result<(), Box<dyn Error>> {
     /// use mio::net::UdpSocket;
     ///
     /// // We must bind it to an open address.
-    /// let socket = UdpSocket::bind(&"127.0.0.1:0".parse()?)?;
+    /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
     /// let cloned_socket = socket.try_clone()?;
     ///
     /// assert_eq!(socket.local_addr()?, cloned_socket.local_addr()?);
     ///
     /// #    Ok(())
     /// # }
-    /// #
-    /// # fn main() {
-    /// #   try_main().unwrap();
-    /// # }
     /// ```
     pub fn try_clone(&self) -> io::Result<UdpSocket> {
-        self.sys.try_clone()
-            .map(|s| {
-                UdpSocket {
-                    sys: s,
-                    selector_id: self.selector_id.clone(),
-                }
-            })
+        self.sys.try_clone().map(|s| UdpSocket {
+            sys: s,
+            #[cfg(debug_assertions)]
+            selector_id: self.selector_id.clone(),
+        })
     }
 
     /// Sends data on the socket to the given address. On success, returns the
@@ -218,25 +189,21 @@ impl UdpSocket {
     ///
     /// ```no_run
     /// # use std::error::Error;
-    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// # fn main() -> Result<(), Box<dyn Error>> {
     /// use mio::net::UdpSocket;
     ///
-    /// let socket = UdpSocket::bind(&"127.0.0.1:0".parse()?)?;
+    /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
     ///
     /// // We must check if the socket is writable before calling send_to,
     /// // or we could run into a WouldBlock error.
     ///
-    /// let bytes_sent = socket.send_to(&[9; 9], &"127.0.0.1:11100".parse()?)?;
+    /// let bytes_sent = socket.send_to(&[9; 9], "127.0.0.1:11100".parse()?)?;
     /// assert_eq!(bytes_sent, 9);
     /// #
     /// #    Ok(())
     /// # }
-    /// #
-    /// # fn main() {
-    /// #   try_main().unwrap();
-    /// # }
     /// ```
-    pub fn send_to(&self, buf: &[u8], target: &SocketAddr) -> io::Result<usize> {
+    pub fn send_to(&self, buf: &[u8], target: SocketAddr) -> io::Result<usize> {
         self.sys.send_to(buf, target)
     }
 
@@ -248,10 +215,10 @@ impl UdpSocket {
     /// ```no_run
     /// # use std::error::Error;
     /// #
-    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// # fn main() -> Result<(), Box<dyn Error>> {
     /// use mio::net::UdpSocket;
     ///
-    /// let socket = UdpSocket::bind(&"127.0.0.1:0".parse()?)?;
+    /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
     ///
     /// // We must check if the socket is readable before calling recv_from,
     /// // or we could run into a WouldBlock error.
@@ -262,15 +229,41 @@ impl UdpSocket {
     /// #
     /// #    Ok(())
     /// # }
-    /// #
-    /// # fn main() {
-    /// #   try_main().unwrap();
-    /// # }
     /// ```
     pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
         self.sys.recv_from(buf)
     }
 
+    /// Receives data from the socket, without removing it from the input queue.
+    /// On success, returns the number of bytes read and the address from whence
+    /// the data came.
+    /// Receives data from the socket. On success, returns the number of bytes
+    /// read and the address from whence the data came.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use std::error::Error;
+    /// #
+    /// # fn main() -> Result<(), Box<dyn Error>> {
+    /// use mio::net::UdpSocket;
+    ///
+    /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+    ///
+    /// // We must check if the socket is readable before calling recv_from,
+    /// // or we could run into a WouldBlock error.
+    ///
+    /// let mut buf = [0; 9];
+    /// let (num_recv, from_addr) = socket.peek_from(&mut buf)?;
+    /// println!("Received {:?} -> {:?} bytes from {:?}", buf, num_recv, from_addr);
+    /// #
+    /// #    Ok(())
+    /// # }
+    /// ```
+    pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+        self.sys.peek_from(buf)
+    }
+
     /// Sends data on the socket to the address previously bound via connect(). On success,
     /// returns the number of bytes written.
     pub fn send(&self, buf: &[u8]) -> io::Result<usize> {
@@ -283,6 +276,12 @@ impl UdpSocket {
         self.sys.recv(buf)
     }
 
+    /// Receives data from the socket, without removing it from the input queue.
+    /// On success, returns the number of bytes read.
+    pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
+        self.sys.peek(buf)
+    }
+
     /// Connects the UDP socket setting the default destination for `send()`
     /// and limiting packets that are read via `recv` from the address specified
     /// in `addr`.
@@ -300,10 +299,10 @@ impl UdpSocket {
     /// ```
     /// # use std::error::Error;
     /// #
-    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// # fn main() -> Result<(), Box<dyn Error>> {
     /// use mio::net::UdpSocket;
     ///
-    /// let broadcast_socket = UdpSocket::bind(&"127.0.0.1:0".parse()?)?;
+    /// let broadcast_socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
     /// if broadcast_socket.broadcast()? == false {
     ///     broadcast_socket.set_broadcast(true)?;
     /// }
@@ -312,10 +311,6 @@ impl UdpSocket {
     /// #
     /// #    Ok(())
     /// # }
-    /// #
-    /// # fn main() {
-    /// #   try_main().unwrap();
-    /// # }
     /// ```
     pub fn set_broadcast(&self, on: bool) -> io::Result<()> {
         self.sys.set_broadcast(on)
@@ -333,18 +328,14 @@ impl UdpSocket {
     /// ```
     /// # use std::error::Error;
     /// #
-    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// # fn main() -> Result<(), Box<dyn Error>> {
     /// use mio::net::UdpSocket;
     ///
-    /// let broadcast_socket = UdpSocket::bind(&"127.0.0.1:0".parse()?)?;
+    /// let broadcast_socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
     /// assert_eq!(broadcast_socket.broadcast()?, false);
     /// #
     /// #    Ok(())
     /// # }
-    /// #
-    /// # fn main() {
-    /// #   try_main().unwrap();
-    /// # }
     /// ```
     pub fn broadcast(&self) -> io::Result<bool> {
         self.sys.broadcast()
@@ -417,10 +408,10 @@ impl UdpSocket {
     /// ```
     /// # use std::error::Error;
     /// #
-    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// # fn main() -> Result<(), Box<dyn Error>> {
     /// use mio::net::UdpSocket;
     ///
-    /// let socket = UdpSocket::bind(&"127.0.0.1:0".parse()?)?;
+    /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
     /// if socket.ttl()? < 255 {
     ///     socket.set_ttl(255)?;
     /// }
@@ -429,10 +420,6 @@ impl UdpSocket {
     /// #
     /// #    Ok(())
     /// # }
-    /// #
-    /// # fn main() {
-    /// #   try_main().unwrap();
-    /// # }
     /// ```
     pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
         self.sys.set_ttl(ttl)
@@ -449,20 +436,16 @@ impl UdpSocket {
     /// ```
     /// # use std::error::Error;
     /// #
-    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// # fn main() -> Result<(), Box<dyn Error>> {
     /// use mio::net::UdpSocket;
     ///
-    /// let socket = UdpSocket::bind(&"127.0.0.1:0".parse()?)?;
+    /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
     /// socket.set_ttl(255)?;
     ///
     /// assert_eq!(socket.ttl()?, 255);
     /// #
     /// #    Ok(())
     /// # }
-    /// #
-    /// # fn main() {
-    /// #   try_main().unwrap();
-    /// # }
     /// ```
     pub fn ttl(&self) -> io::Result<u32> {
         self.sys.ttl()
@@ -475,9 +458,7 @@ impl UdpSocket {
     /// address of the local interface with which the system should join the
     /// multicast group. If it's equal to `INADDR_ANY` then an appropriate
     /// interface is chosen by the system.
-    pub fn join_multicast_v4(&self,
-                             multiaddr: &Ipv4Addr,
-                             interface: &Ipv4Addr) -> io::Result<()> {
+    pub fn join_multicast_v4(&self, multiaddr: Ipv4Addr, interface: Ipv4Addr) -> io::Result<()> {
         self.sys.join_multicast_v4(multiaddr, interface)
     }
 
@@ -486,9 +467,7 @@ impl UdpSocket {
     /// This function specifies a new multicast group for this socket to join.
     /// The address must be a valid multicast address, and `interface` is the
     /// index of the interface to join/leave (or 0 to indicate any interface).
-    pub fn join_multicast_v6(&self,
-                             multiaddr: &Ipv6Addr,
-                             interface: u32) -> io::Result<()> {
+    pub fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
         self.sys.join_multicast_v6(multiaddr, interface)
     }
 
@@ -498,9 +477,7 @@ impl UdpSocket {
     /// [`join_multicast_v4`][link].
     ///
     /// [link]: #method.join_multicast_v4
-    pub fn leave_multicast_v4(&self,
-                              multiaddr: &Ipv4Addr,
-                              interface: &Ipv4Addr) -> io::Result<()> {
+    pub fn leave_multicast_v4(&self, multiaddr: Ipv4Addr, interface: Ipv4Addr) -> io::Result<()> {
         self.sys.leave_multicast_v4(multiaddr, interface)
     }
 
@@ -510,33 +487,10 @@ impl UdpSocket {
     /// [`join_multicast_v6`][link].
     ///
     /// [link]: #method.join_multicast_v6
-    pub fn leave_multicast_v6(&self,
-                              multiaddr: &Ipv6Addr,
-                              interface: u32) -> io::Result<()> {
+    pub fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
         self.sys.leave_multicast_v6(multiaddr, interface)
     }
 
-    /// Sets the value for the `IPV6_V6ONLY` option on this socket.
-    ///
-    /// If this is set to `true` then the socket is restricted to sending and
-    /// receiving IPv6 packets only. In this case two IPv4 and IPv6 applications
-    /// can bind the same port at the same time.
-    ///
-    /// If this is set to `false` then the socket can be used to send and
-    /// receive packets from an IPv4-mapped IPv6 address.
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.sys.set_only_v6(only_v6)
-    }
-
-    /// Gets the value of the `IPV6_V6ONLY` option for this socket.
-    ///
-    /// For more information about this option, see [`set_only_v6`][link].
-    ///
-    /// [link]: #method.set_only_v6
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.sys.only_v6()
-    }
-
     /// Get the value of the `SO_ERROR` option on this socket.
     ///
     /// This will retrieve the stored error in the underlying socket, clearing
@@ -545,67 +499,31 @@ impl UdpSocket {
     pub fn take_error(&self) -> io::Result<Option<io::Error>> {
         self.sys.take_error()
     }
-
-    /// Receives a single datagram message socket previously bound with connect.
-    ///
-    /// This operation will attempt to read bytes from this socket and place
-    /// them into the list of buffers provided. Note that each buffer is an
-    /// `IoVec` which can be created from a byte slice.
-    ///
-    /// The buffers provided will be filled sequentially. A buffer will be
-    /// entirely filled up before the next is written to.
-    ///
-    /// The number of bytes read is returned, if successful, or an error is
-    /// returned otherwise. If no bytes are available to be read yet then
-    /// a [`WouldBlock`][link] error is returned. This operation does not block.
-    ///
-    /// On Unix this corresponds to the `readv` syscall.
-    ///
-    /// [link]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.WouldBlock
-    #[cfg(all(unix, not(target_os = "fuchsia")))]
-    pub fn recv_bufs(&self, bufs: &mut [&mut IoVec]) -> io::Result<usize> {
-        self.sys.readv(bufs)
-    }
-
-    /// Sends data on the socket to the address previously bound via connect.
-    ///
-    /// This operation will attempt to send a list of byte buffers to this
-    /// socket in a single datagram. Note that each buffer is an `IoVec`
-    /// which can be created from a byte slice.
-    ///
-    /// The buffers provided will be written sequentially. A buffer will be
-    /// entirely written before the next is written.
-    ///
-    /// The number of bytes written is returned, if successful, or an error is
-    /// returned otherwise. If the socket is not currently writable then a
-    /// [`WouldBlock`][link] error is returned. This operation does not block.
-    ///
-    /// On Unix this corresponds to the `writev` syscall.
-    ///
-    /// [link]: https://doc.rust-lang.org/nightly/std/io/enum.ErrorKind.html#variant.WouldBlock
-    #[cfg(all(unix, not(target_os = "fuchsia")))]
-    pub fn send_bufs(&self, bufs: &[&IoVec]) -> io::Result<usize> {
-        self.sys.writev(bufs)
-    }
 }
 
-impl Evented for UdpSocket {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.selector_id.associate_selector(poll)?;
-        self.sys.register(poll, token, interest, opts)
+impl event::Source for UdpSocket {
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()> {
+        #[cfg(debug_assertions)]
+        self.selector_id.associate_selector(registry)?;
+        self.sys.register(registry, token, interests)
     }
 
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.reregister(poll, token, interest, opts)
+    fn reregister(
+        &self,
+        registry: &Registry,
+        token: Token,
+        interests: Interests,
+    ) -> io::Result<()> {
+        self.sys.reregister(registry, token, interests)
     }
 
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.sys.deregister(poll)
+    fn deregister(&self, registry: &Registry) -> io::Result<()> {
+        self.sys.deregister(registry)
     }
 }
 
 impl fmt::Debug for UdpSocket {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Debug::fmt(&self.sys, f)
     }
 }
@@ -616,30 +534,27 @@ impl fmt::Debug for UdpSocket {
  *
  */
 
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-use std::os::unix::io::{IntoRawFd, AsRawFd, FromRawFd, RawFd};
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
+#[cfg(unix)]
 impl IntoRawFd for UdpSocket {
     fn into_raw_fd(self) -> RawFd {
         self.sys.into_raw_fd()
     }
 }
 
-#[cfg(all(unix, not(target_os = "fuchsia")))]
+#[cfg(unix)]
 impl AsRawFd for UdpSocket {
     fn as_raw_fd(&self) -> RawFd {
         self.sys.as_raw_fd()
     }
 }
 
-#[cfg(all(unix, not(target_os = "fuchsia")))]
+#[cfg(unix)]
 impl FromRawFd for UdpSocket {
     unsafe fn from_raw_fd(fd: RawFd) -> UdpSocket {
         UdpSocket {
             sys: FromRawFd::from_raw_fd(fd),
+            #[cfg(debug_assertions)]
             selector_id: SelectorId::new(),
         }
     }
 }
-

src/sys/fuchsia/awakener.rs

@@ -1,73 +0,0 @@
-use {io, poll, Evented, Ready, Poll, PollOpt, Token};
-use zircon;
-use std::sync::{Arc, Mutex, Weak};
-
-pub struct Awakener {
-    /// Token and weak reference to the port on which Awakener was registered.
-    ///
-    /// When `Awakener::wakeup` is called, these are used to send a wakeup message to the port.
-    inner: Mutex<Option<(Token, Weak<zircon::Port>)>>,
-}
-
-impl Awakener {
-    /// Create a new `Awakener`.
-    pub fn new() -> io::Result<Awakener> {
-        Ok(Awakener {
-            inner: Mutex::new(None)
-        })
-    }
-
-    /// Send a wakeup signal to the `Selector` on which the `Awakener` was registered.
-    pub fn wakeup(&self) -> io::Result<()> {
-        let inner_locked = self.inner.lock().unwrap();
-        let &(token, ref weak_port) =
-            inner_locked.as_ref().expect("Called wakeup on unregistered awakener.");
-
-        let port = weak_port.upgrade().expect("Tried to wakeup a closed port.");
-
-        let status = 0; // arbitrary
-        let packet = zircon::Packet::from_user_packet(
-            token.0 as u64, status, zircon::UserPacket::from_u8_array([0; 32]));
-
-        Ok(port.queue(&packet)?)
-    }
-
-    pub fn cleanup(&self) {}
-}
-
-impl Evented for Awakener {
-    fn register(&self,
-                poll: &Poll,
-                token: Token,
-                _events: Ready,
-                _opts: PollOpt) -> io::Result<()>
-    {
-        let mut inner_locked = self.inner.lock().unwrap();
-        if inner_locked.is_some() {
-            panic!("Called register on already-registered Awakener.");
-        }
-        *inner_locked = Some((token, Arc::downgrade(poll::selector(poll).port())));
-
-        Ok(())
-    }
-
-    fn reregister(&self,
-                  poll: &Poll,
-                  token: Token,
-                  _events: Ready,
-                  _opts: PollOpt) -> io::Result<()>
-    {
-        let mut inner_locked = self.inner.lock().unwrap();
-        *inner_locked = Some((token, Arc::downgrade(poll::selector(poll).port())));
-
-        Ok(())
-    }
-
-    fn deregister(&self, _poll: &Poll) -> io::Result<()>
-    {
-        let mut inner_locked = self.inner.lock().unwrap();
-        *inner_locked = None;
-
-        Ok(())
-    }
-}

src/sys/fuchsia/eventedfd.rs

@@ -1,263 +0,0 @@
-use {io, poll, Evented, Ready, Poll, PollOpt, Token};
-use libc;
-use zircon;
-use zircon::AsHandleRef;
-use sys::fuchsia::{DontDrop, poll_opts_to_wait_async, sys};
-use std::mem;
-use std::os::unix::io::RawFd;
-use std::sync::{Arc, Mutex};
-
-/// Properties of an `EventedFd`'s current registration
-#[derive(Debug)]
-pub struct EventedFdRegistration {
-    token: Token,
-    handle: DontDrop<zircon::Handle>,
-    rereg_signals: Option<(zircon::Signals, zircon::WaitAsyncOpts)>,
-}
-
-impl EventedFdRegistration {
-    unsafe fn new(token: Token,
-                  raw_handle: sys::zx_handle_t,
-                  rereg_signals: Option<(zircon::Signals, zircon::WaitAsyncOpts)>,
-                  ) -> Self
-    {
-        EventedFdRegistration {
-            token: token,
-            handle: DontDrop::new(zircon::Handle::from_raw(raw_handle)),
-            rereg_signals: rereg_signals
-        }
-    }
-
-    pub fn rereg_signals(&self) -> Option<(zircon::Signals, zircon::WaitAsyncOpts)> {
-        self.rereg_signals
-    }
-}
-
-/// An event-ed file descriptor. The file descriptor is owned by this structure.
-#[derive(Debug)]
-pub struct EventedFdInner {
-    /// Properties of the current registration.
-    registration: Mutex<Option<EventedFdRegistration>>,
-
-    /// Owned file descriptor.
-    ///
-    /// `fd` is closed on `Drop`, so modifying `fd` is a memory-unsafe operation.
-    fd: RawFd,
-
-    /// Owned `fdio_t` pointer.
-    fdio: *const sys::fdio_t,
-}
-
-impl EventedFdInner {
-    pub fn rereg_for_level(&self, port: &zircon::Port) {
-        let registration_opt = self.registration.lock().unwrap();
-        if let Some(ref registration) = *registration_opt {
-            if let Some((rereg_signals, rereg_opts)) = registration.rereg_signals {
-                let _res =
-                    registration
-                        .handle.inner_ref()
-                        .wait_async_handle(
-                            port,
-                            registration.token.0 as u64,
-                            rereg_signals,
-                            rereg_opts);
-            }
-        }
-    }
-
-    pub fn registration(&self) -> &Mutex<Option<EventedFdRegistration>> {
-        &self.registration
-    }
-
-    pub fn fdio(&self) -> &sys::fdio_t {
-        unsafe { &*self.fdio }
-    }
-}
-
-impl Drop for EventedFdInner {
-    fn drop(&mut self) {
-        unsafe {
-            sys::__fdio_release(self.fdio);
-            let _ = libc::close(self.fd);
-        }
-    }
-}
-
-// `EventedInner` must be manually declared `Send + Sync` because it contains a `RawFd` and a
-// `*const sys::fdio_t`. These are only used to make thread-safe system calls, so accessing
-// them is entirely thread-safe.
-//
-// Note: one minor exception to this are the calls to `libc::close` and `__fdio_release`, which
-// happen on `Drop`. These accesses are safe because `drop` can only be called at most once from
-// a single thread, and after it is called no other functions can be called on the `EventedFdInner`.
-unsafe impl Sync for EventedFdInner {}
-unsafe impl Send for EventedFdInner {}
-
-#[derive(Clone, Debug)]
-pub struct EventedFd {
-    pub inner: Arc<EventedFdInner>
-}
-
-impl EventedFd {
-    pub unsafe fn new(fd: RawFd) -> Self {
-        let fdio = sys::__fdio_fd_to_io(fd);
-        assert!(fdio != ::std::ptr::null(), "FileDescriptor given to EventedFd must be valid.");
-
-        EventedFd {
-            inner: Arc::new(EventedFdInner {
-                registration: Mutex::new(None),
-                fd: fd,
-                fdio: fdio,
-            })
-        }
-    }
-
-    fn handle_and_signals_for_events(&self, interest: Ready, opts: PollOpt)
-                -> (sys::zx_handle_t, zircon::Signals)
-    {
-        let epoll_events = ioevent_to_epoll(interest, opts);
-
-        unsafe {
-            let mut raw_handle: sys::zx_handle_t = mem::uninitialized();
-            let mut signals: sys::zx_signals_t = mem::uninitialized();
-            sys::__fdio_wait_begin(self.inner.fdio, epoll_events, &mut raw_handle, &mut signals);
-
-            (raw_handle, signals)
-        }
-    }
-
-    fn register_with_lock(
-        &self,
-        registration: &mut Option<EventedFdRegistration>,
-        poll: &Poll,
-        token: Token,
-        interest: Ready,
-        opts: PollOpt) -> io::Result<()>
-    {
-        if registration.is_some() {
-            return Err(io::Error::new(
-                io::ErrorKind::AlreadyExists,
-                "Called register on an already registered file descriptor."));
-        }
-
-        let (raw_handle, signals) = self.handle_and_signals_for_events(interest, opts);
-
-        let needs_rereg = opts.is_level() && !opts.is_oneshot();
-
-        // If we need to reregister, then each registration should be `oneshot`
-        let opts = opts | if needs_rereg { PollOpt::oneshot() } else { PollOpt::empty() };
-
-        let rereg_signals = if needs_rereg {
-            Some((signals, poll_opts_to_wait_async(opts)))
-        } else {
-            None
-        };
-
-        *registration = Some(
-            unsafe { EventedFdRegistration::new(token, raw_handle, rereg_signals) }
-        );
-
-        // We don't have ownership of the handle, so we can't drop it
-        let handle = DontDrop::new(unsafe { zircon::Handle::from_raw(raw_handle) });
-
-        let registered = poll::selector(poll)
-            .register_fd(handle.inner_ref(), self, token, signals, opts);
-
-        if registered.is_err() {
-            *registration = None;
-        }
-
-        registered
-    }
-
-    fn deregister_with_lock(
-        &self,
-        registration: &mut Option<EventedFdRegistration>,
-        poll: &Poll) -> io::Result<()>
-    {
-        let old_registration = if let Some(old_reg) = registration.take() {
-            old_reg
-        } else {
-            return Err(io::Error::new(
-                io::ErrorKind::NotFound,
-                "Called rereregister on an unregistered file descriptor."))
-        };
-
-        poll::selector(poll)
-            .deregister_fd(old_registration.handle.inner_ref(), old_registration.token)
-    }
-}
-
-impl Evented for EventedFd {
-    fn register(&self,
-                poll: &Poll,
-                token: Token,
-                interest: Ready,
-                opts: PollOpt) -> io::Result<()>
-    {
-        self.register_with_lock(
-            &mut *self.inner.registration.lock().unwrap(),
-            poll,
-            token,
-            interest,
-            opts)
-    }
-
-    fn reregister(&self,
-                  poll: &Poll,
-                  token: Token,
-                  interest: Ready,
-                  opts: PollOpt) -> io::Result<()>
-    {
-        // Take out the registration lock
-        let mut registration_lock = self.inner.registration.lock().unwrap();
-
-        // Deregister
-        self.deregister_with_lock(&mut *registration_lock, poll)?;
-
-        self.register_with_lock(
-            &mut *registration_lock,
-            poll,
-            token,
-            interest,
-            opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        let mut registration_lock = self.inner.registration.lock().unwrap();
-        self.deregister_with_lock(&mut *registration_lock, poll)
-    }
-}
-
-fn ioevent_to_epoll(interest: Ready, opts: PollOpt) -> u32 {
-    use event_imp::ready_from_usize;
-    const HUP: usize   = 0b01000;
-
-    let mut kind = 0;
-
-    if interest.is_readable() {
-        kind |= libc::EPOLLIN;
-    }
-
-    if interest.is_writable() {
-        kind |= libc::EPOLLOUT;
-    }
-
-    if interest.contains(ready_from_usize(HUP)) {
-        kind |= libc::EPOLLRDHUP;
-    }
-
-    if opts.is_edge() {
-        kind |= libc::EPOLLET;
-    }
-
-    if opts.is_oneshot() {
-        kind |= libc::EPOLLONESHOT;
-    }
-
-    if opts.is_level() {
-        kind &= !libc::EPOLLET;
-    }
-
-    kind as u32
-}

src/sys/fuchsia/handles.rs

@@ -1,78 +0,0 @@
-use {io, poll, Evented, Ready, Poll, PollOpt, Token};
-use zircon_sys::zx_handle_t;
-use std::sync::Mutex;
-
-/// Wrapper for registering a `HandleBase` type with mio.
-#[derive(Debug)]
-pub struct EventedHandle {
-    /// The handle to be registered.
-    handle: zx_handle_t,
-
-    /// The current `Token` with which the handle is registered with mio.
-    token: Mutex<Option<Token>>,
-}
-
-impl EventedHandle {
-    /// Create a new `EventedHandle` which can be registered with mio
-    /// in order to receive event notifications.
-    ///
-    /// The underlying handle must not be dropped while the
-    /// `EventedHandle` still exists.
-    pub unsafe fn new(handle: zx_handle_t) -> Self {
-        EventedHandle {
-            handle: handle,
-            token: Mutex::new(None),
-        }
-    }
-
-    /// Get the underlying handle being registered.
-    pub fn get_handle(&self) -> zx_handle_t {
-        self.handle
-    }
-}
-
-impl Evented for EventedHandle {
-    fn register(&self,
-                poll: &Poll,
-                token: Token,
-                interest: Ready,
-                opts: PollOpt) -> io::Result<()>
-    {
-        let mut this_token = self.token.lock().unwrap();
-        {
-            poll::selector(poll).register_handle(self.handle, token, interest, opts)?;
-            *this_token = Some(token);
-        }
-        Ok(())
-    }
-
-    fn reregister(&self,
-        poll: &Poll,
-        token: Token,
-        interest: Ready,
-        opts: PollOpt) -> io::Result<()>
-    {
-        let mut this_token = self.token.lock().unwrap();
-        {
-            poll::selector(poll).deregister_handle(self.handle, token)?;
-            *this_token = None;
-            poll::selector(poll).register_handle(self.handle, token, interest, opts)?;
-            *this_token = Some(token);
-        }
-        Ok(())
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        let mut this_token = self.token.lock().unwrap();
-        let token = if let Some(token) = *this_token { token } else {
-            return Err(io::Error::new(
-                io::ErrorKind::NotFound,
-                "Attempted to deregister an unregistered handle."))
-        };
-        {
-            poll::selector(poll).deregister_handle(self.handle, token)?;
-            *this_token = None;
-        }
-        Ok(())
-    }
-}

src/sys/fuchsia/mod.rs

@@ -1,177 +0,0 @@
-use {io, Ready, PollOpt};
-use libc;
-use zircon;
-use std::mem;
-use std::net::{IpAddr, Ipv4Addr, SocketAddr};
-use std::ops::{Deref, DerefMut};
-use std::os::unix::io::RawFd;
-
-mod awakener;
-mod handles;
-mod eventedfd;
-mod net;
-mod ready;
-mod selector;
-
-use self::eventedfd::{EventedFd, EventedFdInner};
-use self::ready::assert_fuchsia_ready_repr;
-
-pub use self::awakener::Awakener;
-pub use self::handles::EventedHandle;
-pub use self::net::{TcpListener, TcpStream, UdpSocket};
-pub use self::selector::{Events, Selector};
-pub use self::ready::{FuchsiaReady, zx_signals_t};
-
-// Set non-blocking (workaround since the std version doesn't work in fuchsia)
-// TODO: fix the std version and replace this
-pub fn set_nonblock(fd: RawFd) -> io::Result<()> {
-    cvt(unsafe { libc::fcntl(fd, libc::F_SETFL, libc::O_NONBLOCK) }).map(|_| ())
-}
-
-/// Workaround until fuchsia's recv_from is fixed
-unsafe fn recv_from(fd: RawFd, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
-    let flags = 0;
-
-    let n = cvt(
-        libc::recv(fd,
-                   buf.as_mut_ptr() as *mut libc::c_void,
-                   buf.len(),
-                   flags)
-    )?;
-
-    // random address-- we don't use it
-    let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
-    Ok((n as usize, addr))
-}
-
-mod sys {
-    #![allow(non_camel_case_types)]
-    use std::os::unix::io::RawFd;
-    pub use zircon_sys::{zx_handle_t, zx_signals_t};
-
-    // 17 fn pointers we don't need for mio :)
-    pub type fdio_ops_t = [usize; 17];
-
-    pub type atomic_int_fast32_t = usize; // TODO: https://github.com/rust-lang/libc/issues/631
-
-    #[repr(C)]
-    pub struct fdio_t {
-        pub ops: *const fdio_ops_t,
-        pub magic: u32,
-        pub refcount: atomic_int_fast32_t,
-        pub dupcount: u32,
-        pub flags: u32,
-    }
-
-    #[link(name="fdio")]
-    extern {
-        pub fn __fdio_fd_to_io(fd: RawFd) -> *const fdio_t;
-        pub fn __fdio_release(io: *const fdio_t);
-
-        pub fn __fdio_wait_begin(
-            io: *const fdio_t,
-            events: u32,
-            handle_out: &mut zx_handle_t,
-            signals_out: &mut zx_signals_t,
-        );
-        pub fn __fdio_wait_end(
-            io: *const fdio_t,
-            signals: zx_signals_t,
-            events_out: &mut u32,
-        );
-    }
-}
-
-fn epoll_event_to_ready(epoll: u32) -> Ready {
-    let epoll = epoll as i32; // casts the bits directly
-    let mut kind = Ready::empty();
-
-    if (epoll & libc::EPOLLIN) != 0 || (epoll & libc::EPOLLPRI) != 0 {
-        kind = kind | Ready::readable();
-    }
-
-    if (epoll & libc::EPOLLOUT) != 0 {
-        kind = kind | Ready::writable();
-    }
-
-    kind
-
-    /* TODO: support?
-    // EPOLLHUP - Usually means a socket error happened
-    if (epoll & libc::EPOLLERR) != 0 {
-        kind = kind | UnixReady::error();
-    }
-
-    if (epoll & libc::EPOLLRDHUP) != 0 || (epoll & libc::EPOLLHUP) != 0 {
-        kind = kind | UnixReady::hup();
-    }
-    */
-}
-
-fn poll_opts_to_wait_async(poll_opts: PollOpt) -> zircon::WaitAsyncOpts {
-    if poll_opts.is_oneshot() {
-        zircon::WaitAsyncOpts::Once
-    } else {
-        zircon::WaitAsyncOpts::Repeating
-    }
-}
-
-trait IsMinusOne {
-    fn is_minus_one(&self) -> bool;
-}
-
-impl IsMinusOne for i32 {
-    fn is_minus_one(&self) -> bool { *self == -1 }
-}
-
-impl IsMinusOne for isize {
-    fn is_minus_one(&self) -> bool { *self == -1 }
-}
-
-fn cvt<T: IsMinusOne>(t: T) -> ::io::Result<T> {
-    use std::io;
-
-    if t.is_minus_one() {
-        Err(io::Error::last_os_error())
-    } else {
-        Ok(t)
-    }
-}
-
-/// Utility type to prevent the type inside of it from being dropped.
-#[derive(Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
-struct DontDrop<T>(Option<T>);
-
-impl<T> DontDrop<T> {
-    fn new(t: T) -> DontDrop<T> {
-        DontDrop(Some(t))
-    }
-
-    fn inner_ref(&self) -> &T {
-        self.0.as_ref().unwrap()
-    }
-
-    fn inner_mut(&mut self) -> &mut T {
-        self.0.as_mut().unwrap()
-    }
-}
-
-impl<T> Deref for DontDrop<T> {
-    type Target = T;
-    fn deref(&self) -> &Self::Target {
-        self.inner_ref()
-    }
-}
-
-impl<T> DerefMut for DontDrop<T> {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        self.inner_mut()
-    }
-}
-
-impl<T> Drop for DontDrop<T> {
-    fn drop(&mut self) {
-        let inner = self.0.take();
-        mem::forget(inner);
-    }
-}

src/sys/fuchsia/net.rs

@@ -1,444 +0,0 @@
-use {io, Evented, Ready, Poll, PollOpt, Token};
-use iovec::IoVec;
-use iovec::unix as iovec;
-use libc;
-use net2::TcpStreamExt;
-#[allow(unused_imports)] // only here for Rust 1.8
-use net2::UdpSocketExt;
-use sys::fuchsia::{recv_from, set_nonblock, EventedFd, DontDrop};
-use std::cmp;
-use std::io::{Read, Write};
-use std::net::{self, Ipv4Addr, Ipv6Addr, SocketAddr};
-use std::os::unix::io::AsRawFd;
-use std::time::Duration;
-
-#[derive(Debug)]
-pub struct TcpStream {
-    io: DontDrop<net::TcpStream>,
-    evented_fd: EventedFd,
-}
-
-impl TcpStream {
-    pub fn connect(stream: net::TcpStream, addr: &SocketAddr) -> io::Result<TcpStream> {
-        try!(set_nonblock(stream.as_raw_fd()));
-
-        let connected = stream.connect(addr);
-        match connected {
-            Ok(..) => {}
-            Err(ref e) if e.raw_os_error() == Some(libc::EINPROGRESS) => {}
-            Err(e) => return Err(e),
-        }
-
-        let evented_fd = unsafe { EventedFd::new(stream.as_raw_fd()) };
-
-        return Ok(TcpStream {
-            io: DontDrop::new(stream),
-            evented_fd: evented_fd,
-        })
-    }
-
-    pub fn from_stream(stream: net::TcpStream) -> TcpStream {
-        let evented_fd = unsafe { EventedFd::new(stream.as_raw_fd()) };
-
-        TcpStream {
-            io: DontDrop::new(stream),
-            evented_fd: evented_fd,
-        }
-    }
-
-    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
-        self.io.peer_addr()
-    }
-
-    pub fn local_addr(&self) -> io::Result<SocketAddr> {
-        self.io.local_addr()
-    }
-
-    pub fn try_clone(&self) -> io::Result<TcpStream> {
-        self.io.try_clone().map(|s| {
-            let evented_fd = unsafe { EventedFd::new(s.as_raw_fd()) };
-            TcpStream {
-                io: DontDrop::new(s),
-                evented_fd: evented_fd,
-            }
-        })
-    }
-
-    pub fn shutdown(&self, how: net::Shutdown) -> io::Result<()> {
-        self.io.shutdown(how)
-    }
-
-    pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
-        self.io.set_nodelay(nodelay)
-    }
-
-    pub fn nodelay(&self) -> io::Result<bool> {
-        self.io.nodelay()
-    }
-
-    pub fn set_recv_buffer_size(&self, size: usize) -> io::Result<()> {
-        self.io.set_recv_buffer_size(size)
-    }
-
-    pub fn recv_buffer_size(&self) -> io::Result<usize> {
-        self.io.recv_buffer_size()
-    }
-
-    pub fn set_send_buffer_size(&self, size: usize) -> io::Result<()> {
-        self.io.set_send_buffer_size(size)
-    }
-
-    pub fn send_buffer_size(&self) -> io::Result<usize> {
-        self.io.send_buffer_size()
-    }
-
-    pub fn set_keepalive(&self, keepalive: Option<Duration>) -> io::Result<()> {
-        self.io.set_keepalive(keepalive)
-    }
-
-    pub fn keepalive(&self) -> io::Result<Option<Duration>> {
-        self.io.keepalive()
-    }
-
-    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
-        self.io.set_ttl(ttl)
-    }
-
-    pub fn ttl(&self) -> io::Result<u32> {
-        self.io.ttl()
-    }
-
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.io.set_only_v6(only_v6)
-    }
-
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.io.only_v6()
-    }
-
-    pub fn set_linger(&self, dur: Option<Duration>) -> io::Result<()> {
-        self.io.set_linger(dur)
-    }
-
-    pub fn linger(&self) -> io::Result<Option<Duration>> {
-        self.io.linger()
-    }
-
-    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        self.io.take_error()
-    }
-
-    pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
-        self.io.peek(buf)
-    }
-
-    pub fn readv(&self, bufs: &mut [&mut IoVec]) -> io::Result<usize> {
-        unsafe {
-            let slice = iovec::as_os_slice_mut(bufs);
-            let len = cmp::min(<libc::c_int>::max_value() as usize, slice.len());
-            let rc = libc::readv(self.io.as_raw_fd(),
-                                 slice.as_ptr(),
-                                 len as libc::c_int);
-            if rc < 0 {
-                Err(io::Error::last_os_error())
-            } else {
-                Ok(rc as usize)
-            }
-        }
-    }
-
-    pub fn writev(&self, bufs: &[&IoVec]) -> io::Result<usize> {
-        unsafe {
-            let slice = iovec::as_os_slice(bufs);
-            let len = cmp::min(<libc::c_int>::max_value() as usize, slice.len());
-            let rc = libc::writev(self.io.as_raw_fd(),
-                                  slice.as_ptr(),
-                                  len as libc::c_int);
-            if rc < 0 {
-                Err(io::Error::last_os_error())
-            } else {
-                Ok(rc as usize)
-            }
-        }
-    }
-}
-
-impl<'a> Read for &'a TcpStream {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        self.io.inner_ref().read(buf)
-    }
-}
-
-impl<'a> Write for &'a TcpStream {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        self.io.inner_ref().write(buf)
-    }
-    fn flush(&mut self) -> io::Result<()> {
-        self.io.inner_ref().flush()
-    }
-}
-
-impl Evented for TcpStream {
-    fn register(&self,
-                poll: &Poll,
-                token: Token,
-                interest: Ready,
-                opts: PollOpt) -> io::Result<()>
-    {
-        self.evented_fd.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self,
-                  poll: &Poll,
-                  token: Token,
-                  interest: Ready,
-                  opts: PollOpt) -> io::Result<()>
-    {
-        self.evented_fd.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.evented_fd.deregister(poll)
-    }
-}
-
-#[derive(Debug)]
-pub struct TcpListener {
-    io: DontDrop<net::TcpListener>,
-    evented_fd: EventedFd,
-}
-
-impl TcpListener {
-    pub fn new(inner: net::TcpListener) -> io::Result<TcpListener> {
-        set_nonblock(inner.as_raw_fd())?;
-
-        let evented_fd = unsafe { EventedFd::new(inner.as_raw_fd()) };
-
-        Ok(TcpListener {
-            io: DontDrop::new(inner),
-            evented_fd: evented_fd,
-        })
-    }
-
-    pub fn local_addr(&self) -> io::Result<SocketAddr> {
-        self.io.local_addr()
-    }
-
-    pub fn try_clone(&self) -> io::Result<TcpListener> {
-        self.io.try_clone().map(|io| {
-            let evented_fd = unsafe { EventedFd::new(io.as_raw_fd()) };
-            TcpListener {
-                io: DontDrop::new(io),
-                evented_fd: evented_fd,
-            }
-        })
-    }
-
-    pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
-        self.io.accept().and_then(|(s, a)| {
-            set_nonblock(s.as_raw_fd())?;
-            let evented_fd = unsafe { EventedFd::new(s.as_raw_fd()) };
-            return Ok((TcpStream {
-                io: DontDrop::new(s),
-                evented_fd: evented_fd,
-            }, a))
-        })
-    }
-
-    #[allow(deprecated)]
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.io.set_only_v6(only_v6)
-    }
-
-    #[allow(deprecated)]
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.io.only_v6()
-    }
-
-    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
-        self.io.set_ttl(ttl)
-    }
-
-    pub fn ttl(&self) -> io::Result<u32> {
-        self.io.ttl()
-    }
-
-    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        self.io.take_error()
-    }
-}
-
-impl Evented for TcpListener {
-    fn register(&self,
-                poll: &Poll,
-                token: Token,
-                interest: Ready,
-                opts: PollOpt) -> io::Result<()>
-    {
-        self.evented_fd.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self,
-                  poll: &Poll,
-                  token: Token,
-                  interest: Ready,
-                  opts: PollOpt) -> io::Result<()>
-    {
-        self.evented_fd.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.evented_fd.deregister(poll)
-    }
-}
-
-#[derive(Debug)]
-pub struct UdpSocket {
-    io: DontDrop<net::UdpSocket>,
-    evented_fd: EventedFd,
-}
-
-impl UdpSocket {
-    pub fn new(socket: net::UdpSocket) -> io::Result<UdpSocket> {
-        set_nonblock(socket.as_raw_fd())?;
-
-        let evented_fd = unsafe { EventedFd::new(socket.as_raw_fd()) };
-
-        Ok(UdpSocket {
-            io: DontDrop::new(socket),
-            evented_fd: evented_fd,
-        })
-    }
-
-    pub fn local_addr(&self) -> io::Result<SocketAddr> {
-        self.io.local_addr()
-    }
-
-    pub fn try_clone(&self) -> io::Result<UdpSocket> {
-        self.io.try_clone().and_then(|io| {
-            UdpSocket::new(io)
-        })
-    }
-
-    pub fn send_to(&self, buf: &[u8], target: &SocketAddr) -> io::Result<usize> {
-        self.io.send_to(buf, target)
-    }
-
-    pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
-        unsafe { recv_from(self.io.as_raw_fd(), buf) }
-    }
-
-    pub fn send(&self, buf: &[u8]) -> io::Result<usize> {
-        self.io.send(buf)
-    }
-
-    pub fn recv(&self, buf: &mut [u8]) -> io::Result<usize> {
-        self.io.recv(buf)
-    }
-
-    pub fn connect(&self, addr: SocketAddr)
-                   -> io::Result<()> {
-        self.io.connect(addr)
-    }
-
-    pub fn broadcast(&self) -> io::Result<bool> {
-        self.io.broadcast()
-    }
-
-    pub fn set_broadcast(&self, on: bool) -> io::Result<()> {
-        self.io.set_broadcast(on)
-    }
-
-    pub fn multicast_loop_v4(&self) -> io::Result<bool> {
-        self.io.multicast_loop_v4()
-    }
-
-    pub fn set_multicast_loop_v4(&self, on: bool) -> io::Result<()> {
-        self.io.set_multicast_loop_v4(on)
-    }
-
-    pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
-        self.io.multicast_ttl_v4()
-    }
-
-    pub fn set_multicast_ttl_v4(&self, ttl: u32) -> io::Result<()> {
-        self.io.set_multicast_ttl_v4(ttl)
-    }
-
-    pub fn multicast_loop_v6(&self) -> io::Result<bool> {
-        self.io.multicast_loop_v6()
-    }
-
-    pub fn set_multicast_loop_v6(&self, on: bool) -> io::Result<()> {
-        self.io.set_multicast_loop_v6(on)
-    }
-
-    pub fn ttl(&self) -> io::Result<u32> {
-        self.io.ttl()
-    }
-
-    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
-        self.io.set_ttl(ttl)
-    }
-
-    pub fn join_multicast_v4(&self,
-                             multiaddr: &Ipv4Addr,
-                             interface: &Ipv4Addr) -> io::Result<()> {
-        self.io.join_multicast_v4(multiaddr, interface)
-    }
-
-    pub fn join_multicast_v6(&self,
-                             multiaddr: &Ipv6Addr,
-                             interface: u32) -> io::Result<()> {
-        self.io.join_multicast_v6(multiaddr, interface)
-    }
-
-    pub fn leave_multicast_v4(&self,
-                              multiaddr: &Ipv4Addr,
-                              interface: &Ipv4Addr) -> io::Result<()> {
-        self.io.leave_multicast_v4(multiaddr, interface)
-    }
-
-    pub fn leave_multicast_v6(&self,
-                              multiaddr: &Ipv6Addr,
-                              interface: u32) -> io::Result<()> {
-        self.io.leave_multicast_v6(multiaddr, interface)
-    }
-
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.io.set_only_v6(only_v6)
-    }
-
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.io.only_v6()
-    }
-
-
-    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        self.io.take_error()
-    }
-}
-
-impl Evented for UdpSocket {
-    fn register(&self,
-                poll: &Poll,
-                token: Token,
-                interest: Ready,
-                opts: PollOpt) -> io::Result<()>
-    {
-        self.evented_fd.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self,
-                  poll: &Poll,
-                  token: Token,
-                  interest: Ready,
-                  opts: PollOpt) -> io::Result<()>
-    {
-        self.evented_fd.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.evented_fd.deregister(poll)
-    }
-}

src/sys/fuchsia/ready.rs

@@ -1,181 +0,0 @@
-use event_imp::{Ready, ready_as_usize, ready_from_usize};
-pub use zircon_sys::{
-    zx_signals_t,
-    ZX_OBJECT_READABLE,
-    ZX_OBJECT_WRITABLE,
-};
-use std::ops;
-
-// The following impls are valid because Fuchsia and mio both represent
-// "readable" as `1 << 0` and "writable" as `1 << 2`.
-// We define this assertion here and call it from `Selector::new`,
-// since `Selector:;new` is guaranteed to be called during a standard mio runtime,
-// unlike the functions in this file.
-#[inline]
-pub fn assert_fuchsia_ready_repr() {
-    debug_assert!(
-        ZX_OBJECT_READABLE.bits() as usize == ready_as_usize(Ready::readable()),
-        "Zircon ZX_OBJECT_READABLE should have the same repr as Ready::readable()"
-    );
-    debug_assert!(
-        ZX_OBJECT_WRITABLE.bits() as usize == ready_as_usize(Ready::writable()),
-        "Zircon ZX_OBJECT_WRITABLE should have the same repr as Ready::writable()"
-    );
-}
-
-/// Fuchsia specific extensions to `Ready`
-///
-/// Provides additional readiness event kinds that are available on Fuchsia.
-///
-/// Conversion traits are implemented between `Ready` and `FuchsiaReady`.
-///
-/// For high level documentation on polling and readiness, see [`Poll`].
-///
-/// [`Poll`]: struct.Poll.html
-#[derive(Debug, Copy, PartialEq, Eq, Clone, PartialOrd, Ord)]
-pub struct FuchsiaReady(Ready);
-
-impl FuchsiaReady {
-    /// Returns the `FuchsiaReady` as raw zircon signals.
-    /// This function is just a more explicit, non-generic version of
-    /// `FuchsiaReady::into`.
-    #[inline]
-    pub fn into_zx_signals(self) -> zx_signals_t {
-        zx_signals_t::from_bits_truncate(ready_as_usize(self.0) as u32)
-    }
-}
-
-impl Into<zx_signals_t> for FuchsiaReady {
-    #[inline]
-    fn into(self) -> zx_signals_t {
-        self.into_zx_signals()
-    }
-}
-
-impl From<zx_signals_t> for FuchsiaReady {
-    #[inline]
-    fn from(src: zx_signals_t) -> Self {
-        FuchsiaReady(src.into())
-    }
-}
-
-impl From<zx_signals_t> for Ready {
-    #[inline]
-    fn from(src: zx_signals_t) -> Self {
-        ready_from_usize(src.bits() as usize)
-    }
-}
-
-impl From<Ready> for FuchsiaReady {
-    #[inline]
-    fn from(src: Ready) -> FuchsiaReady {
-        FuchsiaReady(src)
-    }
-}
-
-impl From<FuchsiaReady> for Ready {
-    #[inline]
-    fn from(src: FuchsiaReady) -> Ready {
-        src.0
-    }
-}
-
-impl ops::Deref for FuchsiaReady {
-    type Target = Ready;
-
-    #[inline]
-    fn deref(&self) -> &Ready {
-        &self.0
-    }
-}
-
-impl ops::DerefMut for FuchsiaReady {
-    #[inline]
-    fn deref_mut(&mut self) -> &mut Ready {
-        &mut self.0
-    }
-}
-
-impl ops::BitOr for FuchsiaReady {
-    type Output = FuchsiaReady;
-
-    #[inline]
-    fn bitor(self, other: FuchsiaReady) -> FuchsiaReady {
-        (self.0 | other.0).into()
-    }
-}
-
-impl ops::BitXor for FuchsiaReady {
-    type Output = FuchsiaReady;
-
-    #[inline]
-    fn bitxor(self, other: FuchsiaReady) -> FuchsiaReady {
-        (self.0 ^ other.0).into()
-    }
-}
-
-impl ops::BitAnd for FuchsiaReady {
-    type Output = FuchsiaReady;
-
-    #[inline]
-    fn bitand(self, other: FuchsiaReady) -> FuchsiaReady {
-        (self.0 & other.0).into()
-    }
-}
-
-impl ops::Sub for FuchsiaReady {
-    type Output = FuchsiaReady;
-
-    #[inline]
-    fn sub(self, other: FuchsiaReady) -> FuchsiaReady {
-        (self.0 & !other.0).into()
-    }
-}
-
-#[deprecated(since = "0.6.10", note = "removed")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-impl ops::Not for FuchsiaReady {
-    type Output = FuchsiaReady;
-
-    #[inline]
-    fn not(self) -> FuchsiaReady {
-        (!self.0).into()
-    }
-}
-
-impl ops::BitOr<zx_signals_t> for FuchsiaReady {
-    type Output = FuchsiaReady;
-
-    #[inline]
-    fn bitor(self, other: zx_signals_t) -> FuchsiaReady {
-        self | FuchsiaReady::from(other)
-    }
-}
-
-impl ops::BitXor<zx_signals_t> for FuchsiaReady {
-    type Output = FuchsiaReady;
-
-    #[inline]
-    fn bitxor(self, other: zx_signals_t) -> FuchsiaReady {
-        self ^ FuchsiaReady::from(other)
-    }
-}
-
-impl ops::BitAnd<zx_signals_t> for FuchsiaReady {
-    type Output = FuchsiaReady;
-
-    #[inline]
-    fn bitand(self, other: zx_signals_t) -> FuchsiaReady {
-        self & FuchsiaReady::from(other)
-    }
-}
-
-impl ops::Sub<zx_signals_t> for FuchsiaReady {
-    type Output = FuchsiaReady;
-
-    #[inline]
-    fn sub(self, other: zx_signals_t) -> FuchsiaReady {
-        self - FuchsiaReady::from(other)
-    }
-}

src/sys/fuchsia/selector.rs

@@ -1,353 +0,0 @@
-use {io, Event, PollOpt, Ready, Token};
-use sys::fuchsia::{
-    assert_fuchsia_ready_repr,
-    epoll_event_to_ready,
-    poll_opts_to_wait_async,
-    EventedFd,
-    EventedFdInner,
-    FuchsiaReady,
-};
-use zircon;
-use zircon::AsHandleRef;
-use zircon_sys::zx_handle_t;
-use std::collections::hash_map;
-use std::fmt;
-use std::mem;
-use std::sync::atomic::{AtomicBool, AtomicUsize, ATOMIC_USIZE_INIT, Ordering};
-use std::sync::{Arc, Mutex, Weak};
-use std::time::Duration;
-use sys;
-
-/// The kind of registration-- file descriptor or handle.
-///
-/// The last bit of a token is set to indicate the type of the registration.
-#[derive(Copy, Clone, Eq, PartialEq)]
-enum RegType {
-    Fd,
-    Handle,
-}
-
-fn key_from_token_and_type(token: Token, reg_type: RegType) -> io::Result<u64> {
-    let key = token.0 as u64;
-    let msb = 1u64 << 63;
-    if (key & msb) != 0 {
-        return Err(io::Error::new(
-            io::ErrorKind::InvalidInput,
-            "Most-significant bit of token must remain unset."));
-    }
-
-    Ok(match reg_type {
-        RegType::Fd => key,
-        RegType::Handle => key | msb,
-    })
-}
-
-fn token_and_type_from_key(key: u64) -> (Token, RegType) {
-    let msb = 1u64 << 63;
-    (
-        Token((key & !msb) as usize),
-        if (key & msb) == 0 {
-            RegType::Fd
-        } else {
-            RegType::Handle
-        }
-    )
-}
-
-/// Each Selector has a globally unique(ish) ID associated with it. This ID
-/// gets tracked by `TcpStream`, `TcpListener`, etc... when they are first
-/// registered with the `Selector`. If a type that is previously associated with
-/// a `Selector` attempts to register itself with a different `Selector`, the
-/// operation will return with an error. This matches windows behavior.
-static NEXT_ID: AtomicUsize = ATOMIC_USIZE_INIT;
-
-pub struct Selector {
-    id: usize,
-
-    /// Zircon object on which the handles have been registered, and on which events occur
-    port: Arc<zircon::Port>,
-
-    /// Whether or not `tokens_to_rereg` contains any elements. This is a best-effort attempt
-    /// used to prevent having to lock `tokens_to_rereg` when it is empty.
-    has_tokens_to_rereg: AtomicBool,
-
-    /// List of `Token`s corresponding to registrations that need to be reregistered before the
-    /// next `port::wait`. This is necessary to provide level-triggered behavior for
-    /// `Async::repeating` registrations.
-    ///
-    /// When a level-triggered `Async::repeating` event is seen, its token is added to this list so
-    /// that it will be reregistered before the next `port::wait` call, making `port::wait` return
-    /// immediately if the signal was high during the reregistration.
-    ///
-    /// Note: when used at the same time, the `tokens_to_rereg` lock should be taken out _before_
-    /// `token_to_fd`.
-    tokens_to_rereg: Mutex<Vec<Token>>,
-
-    /// Map from tokens to weak references to `EventedFdInner`-- a structure describing a
-    /// file handle, its associated `fdio` object, and its current registration.
-    token_to_fd: Mutex<hash_map::HashMap<Token, Weak<EventedFdInner>>>,
-}
-
-impl Selector {
-    pub fn new() -> io::Result<Selector> {
-        // Assertion from fuchsia/ready.rs to make sure that FuchsiaReady's representation is
-        // compatible with Ready.
-        assert_fuchsia_ready_repr();
-
-        let port = Arc::new(
-            zircon::Port::create(zircon::PortOpts::Default)?
-        );
-
-        // offset by 1 to avoid choosing 0 as the id of a selector
-        let id = NEXT_ID.fetch_add(1, Ordering::Relaxed) + 1;
-
-        let has_tokens_to_rereg = AtomicBool::new(false);
-        let tokens_to_rereg = Mutex::new(Vec::new());
-        let token_to_fd = Mutex::new(hash_map::HashMap::new());
-
-        Ok(Selector {
-            id: id,
-            port: port,
-            has_tokens_to_rereg: has_tokens_to_rereg,
-            tokens_to_rereg: tokens_to_rereg,
-            token_to_fd: token_to_fd,
-        })
-    }
-
-    pub fn id(&self) -> usize {
-        self.id
-    }
-
-    /// Returns a reference to the underlying port `Arc`.
-    pub fn port(&self) -> &Arc<zircon::Port> { &self.port }
-
-    /// Reregisters all registrations pointed to by the `tokens_to_rereg` list
-    /// if `has_tokens_to_rereg`.
-    fn reregister_handles(&self) -> io::Result<()> {
-        // We use `Ordering::Acquire` to make sure that we see all `tokens_to_rereg`
-        // written before the store using `Ordering::Release`.
-        if self.has_tokens_to_rereg.load(Ordering::Acquire) {
-            let mut tokens = self.tokens_to_rereg.lock().unwrap();
-            let token_to_fd = self.token_to_fd.lock().unwrap();
-            for token in tokens.drain(0..) {
-                if let Some(eventedfd) = token_to_fd.get(&token)
-                    .and_then(|h| h.upgrade()) {
-                    eventedfd.rereg_for_level(&self.port);
-                }
-            }
-            self.has_tokens_to_rereg.store(false, Ordering::Release);
-        }
-        Ok(())
-    }
-
-    pub fn select(&self,
-                  evts: &mut Events,
-                  _awakener: Token,
-                  timeout: Option<Duration>) -> io::Result<bool>
-    {
-        evts.clear();
-
-        self.reregister_handles()?;
-
-        let deadline = match timeout {
-            Some(duration) => {
-                let nanos = duration.as_secs().saturating_mul(1_000_000_000)
-                                .saturating_add(duration.subsec_nanos() as u64);
-
-                zircon::deadline_after(nanos)
-            }
-            None => zircon::ZX_TIME_INFINITE,
-        };
-
-        let packet = match self.port.wait(deadline) {
-            Ok(packet) => packet,
-            Err(zircon::Status::ErrTimedOut) => return Ok(false),
-            Err(e) => Err(e)?,
-        };
-
-        let observed_signals = match packet.contents() {
-            zircon::PacketContents::SignalOne(signal_packet) => {
-                signal_packet.observed()
-            }
-            zircon::PacketContents::SignalRep(signal_packet) => {
-                signal_packet.observed()
-            }
-            zircon::PacketContents::User(_user_packet) => {
-                // User packets are only ever sent by an Awakener
-                return Ok(true);
-            }
-        };
-
-        let key = packet.key();
-        let (token, reg_type) = token_and_type_from_key(key);
-
-        match reg_type {
-            RegType::Handle => {
-                // We can return immediately-- no lookup or registration necessary.
-                evts.events.push(Event::new(Ready::from(observed_signals), token));
-                Ok(false)
-            },
-            RegType::Fd => {
-                // Convert the signals to epoll events using __fdio_wait_end,
-                // and add to reregistration list if necessary.
-                let events: u32;
-                {
-                    let handle = if let Some(handle) =
-                    self.token_to_fd.lock().unwrap()
-                        .get(&token)
-                        .and_then(|h| h.upgrade()) {
-                        handle
-                    } else {
-                        // This handle is apparently in the process of removal.
-                        // It has been removed from the list, but port_cancel has not been called.
-                        return Ok(false);
-                    };
-
-                    events = unsafe {
-                        let mut events: u32 = mem::uninitialized();
-                        sys::fuchsia::sys::__fdio_wait_end(handle.fdio(), observed_signals, &mut events);
-                        events
-                    };
-
-                    // If necessary, queue to be reregistered before next port_await
-                    let needs_to_rereg = {
-                        let registration_lock = handle.registration().lock().unwrap();
-
-                        registration_lock
-                            .as_ref()
-                            .and_then(|r| r.rereg_signals())
-                            .is_some()
-                    };
-
-                    if needs_to_rereg {
-                        let mut tokens_to_rereg_lock = self.tokens_to_rereg.lock().unwrap();
-                        tokens_to_rereg_lock.push(token);
-                        // We use `Ordering::Release` to make sure that we see all `tokens_to_rereg`
-                        // written before the store.
-                        self.has_tokens_to_rereg.store(true, Ordering::Release);
-                    }
-                }
-
-                evts.events.push(Event::new(epoll_event_to_ready(events), token));
-                Ok(false)
-            },
-        }
-    }
-
-    /// Register event interests for the given IO handle with the OS
-    pub fn register_fd(&self,
-                       handle: &zircon::Handle,
-                       fd: &EventedFd,
-                       token: Token,
-                       signals: zircon::Signals,
-                       poll_opts: PollOpt) -> io::Result<()>
-    {
-        {
-            let mut token_to_fd = self.token_to_fd.lock().unwrap();
-            match token_to_fd.entry(token) {
-                hash_map::Entry::Occupied(_) =>
-                    return Err(io::Error::new(io::ErrorKind::AlreadyExists,
-                               "Attempted to register a filedescriptor on an existing token.")),
-                hash_map::Entry::Vacant(slot) => slot.insert(Arc::downgrade(&fd.inner)),
-            };
-        }
-
-        let wait_async_opts = poll_opts_to_wait_async(poll_opts);
-
-        let wait_res = handle.wait_async_handle(&self.port, token.0 as u64, signals, wait_async_opts);
-
-        if wait_res.is_err() {
-            self.token_to_fd.lock().unwrap().remove(&token);
-        }
-
-        Ok(wait_res?)
-    }
-
-    /// Deregister event interests for the given IO handle with the OS
-    pub fn deregister_fd(&self, handle: &zircon::Handle, token: Token) -> io::Result<()> {
-        self.token_to_fd.lock().unwrap().remove(&token);
-
-        // We ignore NotFound errors since oneshots are automatically deregistered,
-        // but mio will attempt to deregister them manually.
-        self.port.cancel(&*handle, token.0 as u64)
-            .map_err(io::Error::from)
-            .or_else(|e| if e.kind() == io::ErrorKind::NotFound {
-                Ok(())
-            } else {
-                Err(e)
-            })
-    }
-
-    pub fn register_handle(&self,
-                           handle: zx_handle_t,
-                           token: Token,
-                           interests: Ready,
-                           poll_opts: PollOpt) -> io::Result<()>
-    {
-        if poll_opts.is_level() && !poll_opts.is_oneshot() {
-            return Err(io::Error::new(io::ErrorKind::InvalidInput,
-                      "Repeated level-triggered events are not supported on Fuchsia handles."));
-        }
-
-        let temp_handle = unsafe { zircon::Handle::from_raw(handle) };
-
-        let res = temp_handle.wait_async_handle(
-                    &self.port,
-                    key_from_token_and_type(token, RegType::Handle)?,
-                    FuchsiaReady::from(interests).into_zx_signals(),
-                    poll_opts_to_wait_async(poll_opts));
-
-        mem::forget(temp_handle);
-
-        Ok(res?)
-    }
-
-
-    pub fn deregister_handle(&self, handle: zx_handle_t, token: Token) -> io::Result<()>
-    {
-        let temp_handle = unsafe { zircon::Handle::from_raw(handle) };
-        let res = self.port.cancel(&temp_handle, key_from_token_and_type(token, RegType::Handle)?);
-
-        mem::forget(temp_handle);
-
-        Ok(res?)
-    }
-}
-
-pub struct Events {
-    events: Vec<Event>
-}
-
-impl Events {
-    pub fn with_capacity(_u: usize) -> Events {
-        // The Fuchsia selector only handles one event at a time,
-        // so we ignore the default capacity and set it to one.
-        Events { events: Vec::with_capacity(1) }
-    }
-    pub fn len(&self) -> usize {
-        self.events.len()
-    }
-    pub fn capacity(&self) -> usize {
-        self.events.capacity()
-    }
-    pub fn is_empty(&self) -> bool {
-        self.events.is_empty()
-    }
-    pub fn get(&self, idx: usize) -> Option<Event> {
-        self.events.get(idx).map(|e| *e)
-    }
-    pub fn push_event(&mut self, event: Event) {
-        self.events.push(event)
-    }
-    pub fn clear(&mut self) {
-        self.events.events.drain(0..);
-    }
-}
-
-impl fmt::Debug for Events {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt.debug_struct("Events")
-            .field("len", &self.len())
-            .finish()
-    }
-}

src/sys/mod.rs

@@ -1,56 +1,20 @@
-#[cfg(all(unix, not(target_os = "fuchsia")))]
+//! Module with system specific types.
+//!
+//! `Event`: a type alias for the system specific event, e.g.
+//!          `kevent` or `epoll_event`.
+//! `event`: a module with various helper functions for `Event`, see
+//!          `crate::event::Event` for the required functions.
+
+#[cfg(unix)]
 pub use self::unix::{
-    Awakener,
-    EventedFd,
-    Events,
-    Io,
-    Selector,
-    TcpStream,
-    TcpListener,
-    UdpSocket,
-    pipe,
-    set_nonblock,
+    event, Event, Events, Selector, SourceFd, TcpListener, TcpStream, UdpSocket, Waker,
 };
 
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-pub use self::unix::READY_ALL;
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-#[cfg(feature = "with-deprecated")]
-pub use self::unix::UnixSocket;
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-pub mod unix;
+#[cfg(unix)]
+mod unix;
 
 #[cfg(windows)]
-pub use self::windows::{
-    Awakener,
-    Events,
-    Selector,
-    TcpStream,
-    TcpListener,
-    UdpSocket,
-    Overlapped,
-    Binding,
-};
+pub use self::windows::{event, Event, Events, Selector, TcpListener, TcpStream, UdpSocket, Waker};
 
 #[cfg(windows)]
 mod windows;
-
-#[cfg(target_os = "fuchsia")]
-pub use self::fuchsia::{
-    Awakener,
-    Events,
-    EventedHandle,
-    Selector,
-    TcpStream,
-    TcpListener,
-    UdpSocket,
-    set_nonblock,
-};
-
-#[cfg(target_os = "fuchsia")]
-pub mod fuchsia;
-
-#[cfg(not(all(unix, not(target_os = "fuchsia"))))]
-pub const READY_ALL: usize = 0;

src/sys/unix/awakener.rs

@@ -1,74 +0,0 @@
-pub use self::pipe::Awakener;
-
-/// Default awakener backed by a pipe
-mod pipe {
-    use sys::unix;
-    use {io, Ready, Poll, PollOpt, Token};
-    use event::Evented;
-    use std::io::{Read, Write};
-
-    /*
-     *
-     * ===== Awakener =====
-     *
-     */
-
-    pub struct Awakener {
-        reader: unix::Io,
-        writer: unix::Io,
-    }
-
-    impl Awakener {
-        pub fn new() -> io::Result<Awakener> {
-            let (rd, wr) = unix::pipe()?;
-
-            Ok(Awakener {
-                reader: rd,
-                writer: wr,
-            })
-        }
-
-        pub fn wakeup(&self) -> io::Result<()> {
-            match (&self.writer).write(&[1]) {
-                Ok(_) => Ok(()),
-                Err(e) => {
-                    if e.kind() == io::ErrorKind::WouldBlock {
-                        Ok(())
-                    } else {
-                        Err(e)
-                    }
-                }
-            }
-        }
-
-        pub fn cleanup(&self) {
-            let mut buf = [0; 128];
-
-            loop {
-                // Consume data until all bytes are purged
-                match (&self.reader).read(&mut buf) {
-                    Ok(i) if i > 0 => {},
-                    _ => return,
-                }
-            }
-        }
-
-        fn reader(&self) -> &unix::Io {
-            &self.reader
-        }
-    }
-
-    impl Evented for Awakener {
-        fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-            self.reader().register(poll, token, interest, opts)
-        }
-
-        fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-            self.reader().reregister(poll, token, interest, opts)
-        }
-
-        fn deregister(&self, poll: &Poll) -> io::Result<()> {
-            self.reader().deregister(poll)
-        }
-    }
-}

src/sys/unix/dlsym.rs

@@ -1,47 +0,0 @@
-use std::marker;
-use std::mem;
-use std::sync::atomic::{AtomicUsize, Ordering};
-
-use libc;
-
-macro_rules! dlsym {
-    (fn $name:ident($($t:ty),*) -> $ret:ty) => (
-        #[allow(bad_style)]
-        static $name: ::sys::unix::dlsym::DlSym<unsafe extern fn($($t),*) -> $ret> =
-            ::sys::unix::dlsym::DlSym {
-                name: concat!(stringify!($name), "\0"),
-                addr: ::std::sync::atomic::ATOMIC_USIZE_INIT,
-                _marker: ::std::marker::PhantomData,
-            };
-    )
-}
-
-pub struct DlSym<F> {
-    pub name: &'static str,
-    pub addr: AtomicUsize,
-    pub _marker: marker::PhantomData<F>,
-}
-
-impl<F> DlSym<F> {
-    pub fn get(&self) -> Option<&F> {
-        assert_eq!(mem::size_of::<F>(), mem::size_of::<usize>());
-        unsafe {
-            if self.addr.load(Ordering::SeqCst) == 0 {
-                self.addr.store(fetch(self.name), Ordering::SeqCst);
-            }
-            if self.addr.load(Ordering::SeqCst) == 1 {
-                None
-            } else {
-                mem::transmute::<&AtomicUsize, Option<&F>>(&self.addr)
-            }
-        }
-    }
-}
-
-unsafe fn fetch(name: &str) -> usize {
-    assert_eq!(name.as_bytes()[name.len() - 1], 0);
-    match libc::dlsym(libc::RTLD_DEFAULT, name.as_ptr() as *const _) as usize {
-        0 => 1,
-        n => n,
-    }
-}

src/sys/unix/epoll.rs

@@ -1,248 +1,169 @@
-#![allow(deprecated)]
-use std::os::unix::io::AsRawFd;
-use std::os::unix::io::RawFd;
-use std::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT};
+use crate::sys::Events;
+use crate::{Interests, Token};
+
+use libc::{EPOLLET, EPOLLIN, EPOLLOUT};
+use log::error;
+use std::os::unix::io::{AsRawFd, RawFd};
+#[cfg(debug_assertions)]
+use std::sync::atomic::{AtomicUsize, Ordering};
 use std::time::Duration;
-use std::{cmp, i32};
+use std::{cmp, i32, io, ptr};
 
-use libc::{self, c_int};
-use libc::{EPOLLERR, EPOLLHUP, EPOLLONESHOT};
-use libc::{EPOLLET, EPOLLOUT, EPOLLIN, EPOLLPRI};
-
-use {io, Ready, PollOpt, Token};
-use event_imp::Event;
-use sys::unix::{cvt, UnixReady};
-use sys::unix::io::set_cloexec;
-
-/// Each Selector has a globally unique(ish) ID associated with it. This ID
-/// gets tracked by `TcpStream`, `TcpListener`, etc... when they are first
-/// registered with the `Selector`. If a type that is previously associated with
-/// a `Selector` attempts to register itself with a different `Selector`, the
-/// operation will return with an error. This matches windows behavior.
-static NEXT_ID: AtomicUsize = ATOMIC_USIZE_INIT;
+/// Unique id for use as `SelectorId`.
+#[cfg(debug_assertions)]
+static NEXT_ID: AtomicUsize = AtomicUsize::new(1);
 
 #[derive(Debug)]
 pub struct Selector {
+    #[cfg(debug_assertions)]
     id: usize,
-    epfd: RawFd,
+    ep: RawFd,
 }
 
 impl Selector {
     pub fn new() -> io::Result<Selector> {
-        let epfd = unsafe {
-            let fd = cvt(libc::epoll_create(1024))?;
-            drop(set_cloexec(fd));
-            fd
-        };
-
-        // offset by 1 to avoid choosing 0 as the id of a selector
-        let id = NEXT_ID.fetch_add(1, Ordering::Relaxed) + 1;
-
-        Ok(Selector {
-            id: id,
-            epfd: epfd,
+        // According to libuv `EPOLL_CLOEXEC` is not defined on Android API <
+        // 21. But `EPOLL_CLOEXEC` is an alias for `O_CLOEXEC` on all platforms,
+        // so we use that instead.
+        syscall!(epoll_create1(libc::O_CLOEXEC)).map(|ep| Selector {
+            #[cfg(debug_assertions)]
+            id: NEXT_ID.fetch_add(1, Ordering::Relaxed),
+            ep,
         })
     }
 
+    #[cfg(debug_assertions)]
     pub fn id(&self) -> usize {
         self.id
     }
 
-    /// Wait for events from the OS
-    pub fn select(&self, evts: &mut Events, awakener: Token, timeout: Option<Duration>) -> io::Result<bool> {
-        let timeout_ms = timeout
-            .map(|to| cmp::min(millis(to), i32::MAX as u64) as i32)
+    pub fn try_clone(&self) -> io::Result<Selector> {
+        syscall!(dup(self.ep)).map(|ep| Selector {
+            // It's the same selector, so we use the same id.
+            #[cfg(debug_assertions)]
+            id: self.id,
+            ep,
+        })
+    }
+
+    pub fn select(&self, events: &mut Events, timeout: Option<Duration>) -> io::Result<()> {
+        let timeout = timeout
+            .map(|to| cmp::min(to.as_millis(), libc::c_int::max_value() as u128) as libc::c_int)
             .unwrap_or(-1);
 
-        // Wait for epoll events for at most timeout_ms milliseconds
-        evts.clear();
-        unsafe {
-            let cnt = cvt(libc::epoll_wait(self.epfd,
-                                           evts.events.as_mut_ptr(),
-                                           evts.events.capacity() as i32,
-                                           timeout_ms))?;
-            let cnt = cnt as usize;
-            evts.events.set_len(cnt);
-
-            for i in 0..cnt {
-                if evts.events[i].u64 as usize == awakener.into() {
-                    evts.events.remove(i);
-                    return Ok(true);
-                }
-            }
-        }
-
-        Ok(false)
+        events.clear();
+        syscall!(epoll_wait(
+            self.ep,
+            events.as_mut_ptr(),
+            events.capacity() as i32,
+            timeout,
+        ))
+        .map(|n_events| {
+            // This is safe because `epoll_wait` ensures that `n_events` are
+            // assigned.
+            unsafe { events.set_len(n_events as usize) };
+        })
     }
 
-    /// Register event interests for the given IO handle with the OS
-    pub fn register(&self, fd: RawFd, token: Token, interests: Ready, opts: PollOpt) -> io::Result<()> {
-        let mut info = libc::epoll_event {
-            events: ioevent_to_epoll(interests, opts),
-            u64: usize::from(token) as u64
+    pub fn register(&self, fd: RawFd, token: Token, interests: Interests) -> io::Result<()> {
+        let mut event = libc::epoll_event {
+            events: interests_to_epoll(interests),
+            u64: usize::from(token) as u64,
         };
 
-        unsafe {
-            cvt(libc::epoll_ctl(self.epfd, libc::EPOLL_CTL_ADD, fd, &mut info))?;
-            Ok(())
-        }
+        syscall!(epoll_ctl(self.ep, libc::EPOLL_CTL_ADD, fd, &mut event)).map(|_| ())
     }
 
-    /// Register event interests for the given IO handle with the OS
-    pub fn reregister(&self, fd: RawFd, token: Token, interests: Ready, opts: PollOpt) -> io::Result<()> {
-        let mut info = libc::epoll_event {
-            events: ioevent_to_epoll(interests, opts),
-            u64: usize::from(token) as u64
+    pub fn reregister(&self, fd: RawFd, token: Token, interests: Interests) -> io::Result<()> {
+        let mut event = libc::epoll_event {
+            events: interests_to_epoll(interests),
+            u64: usize::from(token) as u64,
         };
 
-        unsafe {
-            cvt(libc::epoll_ctl(self.epfd, libc::EPOLL_CTL_MOD, fd, &mut info))?;
-            Ok(())
-        }
+        syscall!(epoll_ctl(self.ep, libc::EPOLL_CTL_MOD, fd, &mut event)).map(|_| ())
     }
 
-    /// Deregister event interests for the given IO handle with the OS
     pub fn deregister(&self, fd: RawFd) -> io::Result<()> {
-        // The &info argument should be ignored by the system,
-        // but linux < 2.6.9 required it to be not null.
-        // For compatibility, we provide a dummy EpollEvent.
-        let mut info = libc::epoll_event {
-            events: 0,
-            u64: 0,
-        };
-
-        unsafe {
-            cvt(libc::epoll_ctl(self.epfd, libc::EPOLL_CTL_DEL, fd, &mut info))?;
-            Ok(())
-        }
+        syscall!(epoll_ctl(self.ep, libc::EPOLL_CTL_DEL, fd, ptr::null_mut())).map(|_| ())
     }
 }
 
-fn ioevent_to_epoll(interest: Ready, opts: PollOpt) -> u32 {
-    let mut kind = 0;
+fn interests_to_epoll(interests: Interests) -> u32 {
+    let mut kind = EPOLLET;
 
-    if interest.is_readable() {
+    if interests.is_readable() {
         kind |= EPOLLIN;
     }
 
-    if interest.is_writable() {
+    if interests.is_writable() {
         kind |= EPOLLOUT;
     }
 
-    if UnixReady::from(interest).is_priority() {
-        kind |= EPOLLPRI;
-    }
-
-    if opts.is_edge() {
-        kind |= EPOLLET;
-    }
-
-    if opts.is_oneshot() {
-        kind |= EPOLLONESHOT;
-    }
-
-    if opts.is_level() {
-        kind &= !EPOLLET;
-    }
-
     kind as u32
 }
 
 impl AsRawFd for Selector {
     fn as_raw_fd(&self) -> RawFd {
-        self.epfd
+        self.ep
     }
 }
 
 impl Drop for Selector {
     fn drop(&mut self) {
-        unsafe {
-            let _ = libc::close(self.epfd);
+        if let Err(err) = syscall!(close(self.ep)) {
+            error!("error closing epoll: {}", err);
         }
     }
 }
 
-pub struct Events {
-    events: Vec<libc::epoll_event>,
-}
+pub type Event = libc::epoll_event;
 
-impl Events {
-    pub fn with_capacity(u: usize) -> Events {
-        Events {
-            events: Vec::with_capacity(u)
-        }
+pub mod event {
+    use crate::sys::Event;
+    use crate::Token;
+
+    pub fn token(event: &Event) -> Token {
+        Token(event.u64 as usize)
     }
 
-    #[inline]
-    pub fn len(&self) -> usize {
-        self.events.len()
+    pub fn is_readable(event: &Event) -> bool {
+        (event.events as libc::c_int & libc::EPOLLIN) != 0
+            || (event.events as libc::c_int & libc::EPOLLPRI) != 0
     }
 
-    #[inline]
-    pub fn capacity(&self) -> usize {
-        self.events.capacity()
+    pub fn is_writable(event: &Event) -> bool {
+        (event.events as libc::c_int & libc::EPOLLOUT) != 0
     }
 
-    #[inline]
-    pub fn is_empty(&self) -> bool {
-        self.events.is_empty()
+    pub fn is_error(event: &Event) -> bool {
+        (event.events as libc::c_int & libc::EPOLLERR) != 0
     }
 
-    #[inline]
-    pub fn get(&self, idx: usize) -> Option<Event> {
-        self.events.get(idx).map(|event| {
-            let epoll = event.events as c_int;
-            let mut kind = Ready::empty();
-
-            if (epoll & EPOLLIN) != 0 {
-                kind = kind | Ready::readable();
-            }
-
-            if (epoll & EPOLLPRI) != 0 {
-                kind = kind | Ready::readable() | UnixReady::priority();
-            }
-
-            if (epoll & EPOLLOUT) != 0 {
-                kind = kind | Ready::writable();
-            }
-
-            // EPOLLHUP - Usually means a socket error happened
-            if (epoll & EPOLLERR) != 0 {
-                kind = kind | UnixReady::error();
-            }
-
-            if (epoll & EPOLLHUP) != 0 {
-                kind = kind | UnixReady::hup();
-            }
-
-            let token = self.events[idx].u64;
-
-            Event::new(kind, Token(token as usize))
-        })
+    pub fn is_hup(event: &Event) -> bool {
+        (event.events as libc::c_int & libc::EPOLLHUP) != 0
     }
 
-    pub fn push_event(&mut self, event: Event) {
-        self.events.push(libc::epoll_event {
-            events: ioevent_to_epoll(event.readiness(), PollOpt::empty()),
-            u64: usize::from(event.token()) as u64
-        });
+    pub fn is_read_hup(event: &Event) -> bool {
+        (event.events as libc::c_int & libc::EPOLLRDHUP) != 0
     }
 
-    pub fn clear(&mut self) {
-        unsafe { self.events.set_len(0); }
+    pub fn is_priority(event: &Event) -> bool {
+        (event.events as libc::c_int & libc::EPOLLPRI) != 0
+    }
+
+    pub fn is_aio(_: &Event) -> bool {
+        // Not supported in the kernel, only in libc.
+        false
+    }
+
+    pub fn is_lio(_: &Event) -> bool {
+        // Not supported.
+        false
     }
 }
 
-const NANOS_PER_MILLI: u32 = 1_000_000;
-const MILLIS_PER_SEC: u64 = 1_000;
-
-/// Convert a `Duration` to milliseconds, rounding up and saturating at
-/// `u64::MAX`.
-///
-/// The saturating is fine because `u64::MAX` milliseconds are still many
-/// million years.
-pub fn millis(duration: Duration) -> u64 {
-    // Round up.
-    let millis = (duration.subsec_nanos() + NANOS_PER_MILLI - 1) / NANOS_PER_MILLI;
-    duration.as_secs().saturating_mul(MILLIS_PER_SEC).saturating_add(millis as u64)
+#[test]
+fn assert_close_on_exec_flag() {
+    // This assertion need to be true for Selector::new.
+    assert_eq!(libc::O_CLOEXEC, libc::EPOLL_CLOEXEC);
 }

src/sys/unix/eventedfd.rs

@@ -1,107 +0,0 @@
-use {io, poll, Ready, Poll, PollOpt, Token};
-use event::Evented;
-use std::os::unix::io::RawFd;
-
-/*
- *
- * ===== EventedFd =====
- *
- */
-
-#[derive(Debug)]
-
-/// Adapter for [`RawFd`] providing an [`Evented`] implementation.
-///
-/// `EventedFd` enables registering any type with an FD with [`Poll`].
-///
-/// While only implementations for TCP and UDP are provided, Mio supports
-/// registering any FD that can be registered with the underlying OS selector.
-/// `EventedFd` provides the necessary bridge.
-///
-/// Note that `EventedFd` takes a `&RawFd`. This is because `EventedFd` **does
-/// not** take ownership of the FD. Specifically, it will not manage any
-/// lifecycle related operations, such as closing the FD on drop. It is expected
-/// that the `EventedFd` is constructed right before a call to
-/// [`Poll::register`]. See the examples for more detail.
-///
-/// # Examples
-///
-/// Basic usage
-///
-/// ```
-/// # use std::error::Error;
-/// # fn try_main() -> Result<(), Box<Error>> {
-/// use mio::{Ready, Poll, PollOpt, Token};
-/// use mio::unix::EventedFd;
-///
-/// use std::os::unix::io::AsRawFd;
-/// use std::net::TcpListener;
-///
-/// // Bind a std listener
-/// let listener = TcpListener::bind("127.0.0.1:0")?;
-///
-/// let poll = Poll::new()?;
-///
-/// // Register the listener
-/// poll.register(&EventedFd(&listener.as_raw_fd()),
-///              Token(0), Ready::readable(), PollOpt::edge())?;
-/// #     Ok(())
-/// # }
-/// #
-/// # fn main() {
-/// #     try_main().unwrap();
-/// # }
-/// ```
-///
-/// Implementing [`Evented`] for a custom type backed by a [`RawFd`].
-///
-/// ```
-/// use mio::{Ready, Poll, PollOpt, Token};
-/// use mio::event::Evented;
-/// use mio::unix::EventedFd;
-///
-/// use std::os::unix::io::RawFd;
-/// use std::io;
-///
-/// pub struct MyIo {
-///     fd: RawFd,
-/// }
-///
-/// impl Evented for MyIo {
-///     fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt)
-///         -> io::Result<()>
-///     {
-///         EventedFd(&self.fd).register(poll, token, interest, opts)
-///     }
-///
-///     fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt)
-///         -> io::Result<()>
-///     {
-///         EventedFd(&self.fd).reregister(poll, token, interest, opts)
-///     }
-///
-///     fn deregister(&self, poll: &Poll) -> io::Result<()> {
-///         EventedFd(&self.fd).deregister(poll)
-///     }
-/// }
-/// ```
-///
-/// [`RawFd`]: https://doc.rust-lang.org/std/os/unix/io/type.RawFd.html
-/// [`Evented`]: ../event/trait.Evented.html
-/// [`Poll`]: ../struct.Poll.html
-/// [`Poll::register`]: ../struct.Poll.html#method.register
-pub struct EventedFd<'a>(pub &'a RawFd);
-
-impl<'a> Evented for EventedFd<'a> {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        poll::selector(poll).register(*self.0, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        poll::selector(poll).reregister(*self.0, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        poll::selector(poll).deregister(*self.0)
-    }
-}

src/sys/unix/io.rs

@@ -1,107 +0,0 @@
-use std::fs::File;
-use std::io::{Read, Write};
-use std::os::unix::io::{IntoRawFd, AsRawFd, FromRawFd, RawFd};
-
-use libc;
-
-use {io, Ready, Poll, PollOpt, Token};
-use event::Evented;
-use unix::EventedFd;
-use sys::unix::cvt;
-
-pub fn set_nonblock(fd: libc::c_int) -> io::Result<()> {
-    unsafe {
-        let flags = libc::fcntl(fd, libc::F_GETFL);
-        cvt(libc::fcntl(fd, libc::F_SETFL, flags | libc::O_NONBLOCK)).map(|_|())
-    }
-}
-
-pub fn set_cloexec(fd: libc::c_int) -> io::Result<()> {
-    unsafe {
-        let flags = libc::fcntl(fd, libc::F_GETFD);
-        cvt(libc::fcntl(fd, libc::F_SETFD, flags | libc::FD_CLOEXEC)).map(|_| ())
-    }
-}
-
-/*
- *
- * ===== Basic IO type =====
- *
- */
-
-/// Manages a FD
-#[derive(Debug)]
-pub struct Io {
-    fd: File,
-}
-
-impl Io {
-    /// Try to clone the FD
-    pub fn try_clone(&self) -> io::Result<Io> {
-        Ok(Io { fd: self.fd.try_clone()? })
-    }
-}
-
-impl FromRawFd for Io {
-    unsafe fn from_raw_fd(fd: RawFd) -> Io {
-        Io { fd: File::from_raw_fd(fd) }
-    }
-}
-
-impl IntoRawFd for Io {
-    fn into_raw_fd(self) -> RawFd {
-        self.fd.into_raw_fd()
-    }
-}
-
-impl AsRawFd for Io {
-    fn as_raw_fd(&self) -> RawFd {
-        self.fd.as_raw_fd()
-    }
-}
-
-impl Evented for Io {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).deregister(poll)
-    }
-}
-
-impl Read for Io {
-    fn read(&mut self, dst: &mut [u8]) -> io::Result<usize> {
-        (&self.fd).read(dst)
-    }
-}
-
-impl<'a> Read for &'a Io {
-    fn read(&mut self, dst: &mut [u8]) -> io::Result<usize> {
-        (&self.fd).read(dst)
-    }
-}
-
-impl Write for Io {
-    fn write(&mut self, src: &[u8]) -> io::Result<usize> {
-        (&self.fd).write(src)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        (&self.fd).flush()
-    }
-}
-
-impl<'a> Write for &'a Io {
-    fn write(&mut self, src: &[u8]) -> io::Result<usize> {
-        (&self.fd).write(src)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        (&self.fd).flush()
-    }
-}

src/sys/unix/kqueue.rs

@@ -1,212 +1,293 @@
-use std::{cmp, fmt, ptr};
-#[cfg(not(target_os = "netbsd"))]
-use std::os::raw::{c_int, c_short};
-use std::os::unix::io::AsRawFd;
-use std::os::unix::io::RawFd;
-use std::collections::HashMap;
-use std::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT};
+use crate::sys::Events;
+use crate::{Interests, Token};
+
+use log::error;
+use std::mem::MaybeUninit;
+use std::os::unix::io::{AsRawFd, RawFd};
+#[cfg(debug_assertions)]
+use std::sync::atomic::{AtomicUsize, Ordering};
 use std::time::Duration;
+use std::{cmp, io, ptr, slice};
 
-use libc::{self, time_t};
-
-use {io, Ready, PollOpt, Token};
-use event_imp::{self as event, Event};
-use sys::unix::{cvt, UnixReady};
-use sys::unix::io::set_cloexec;
-
-/// Each Selector has a globally unique(ish) ID associated with it. This ID
-/// gets tracked by `TcpStream`, `TcpListener`, etc... when they are first
-/// registered with the `Selector`. If a type that is previously associated with
-/// a `Selector` attempts to register itself with a different `Selector`, the
-/// operation will return with an error. This matches windows behavior.
-static NEXT_ID: AtomicUsize = ATOMIC_USIZE_INIT;
+/// Unique id for use as `SelectorId`.
+#[cfg(debug_assertions)]
+static NEXT_ID: AtomicUsize = AtomicUsize::new(1);
 
+// Type of the `nchanges` and `nevents` parameters in the `kevent` function.
 #[cfg(not(target_os = "netbsd"))]
-type Filter = c_short;
-#[cfg(not(target_os = "netbsd"))]
-type UData = *mut ::libc::c_void;
-#[cfg(not(target_os = "netbsd"))]
-type Count = c_int;
+type Count = libc::c_int;
+#[cfg(target_os = "netbsd")]
+type Count = libc::size_t;
 
+// Type of the `filter` field in the `kevent` structure.
+#[cfg(any(target_os = "freebsd", target_os = "openbsd"))]
+type Filter = libc::c_short;
+#[cfg(any(target_os = "macos", target_os = "ios"))]
+type Filter = i16;
 #[cfg(target_os = "netbsd")]
 type Filter = u32;
+
+// Type of the `data` field in the `kevent` structure.
+#[cfg(any(
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "ios",
+    target_os = "macos"
+))]
+type Data = libc::intptr_t;
+#[cfg(any(target_os = "bitrig", target_os = "netbsd", target_os = "openbsd",))]
+type Data = i64;
+
+// Type of the `udata` field in the `kevent` structure.
+#[cfg(not(target_os = "netbsd"))]
+type UData = *mut libc::c_void;
 #[cfg(target_os = "netbsd")]
-type UData = ::libc::intptr_t;
-#[cfg(target_os = "netbsd")]
-type Count = usize;
+type UData = libc::intptr_t;
 
 macro_rules! kevent {
     ($id: expr, $filter: expr, $flags: expr, $data: expr) => {
         libc::kevent {
-            ident: $id as ::libc::uintptr_t,
+            ident: $id as libc::uintptr_t,
             filter: $filter as Filter,
             flags: $flags,
             fflags: 0,
             data: 0,
             udata: $data as UData,
         }
-    }
+    };
 }
 
+#[derive(Debug)]
 pub struct Selector {
+    #[cfg(debug_assertions)]
     id: usize,
     kq: RawFd,
 }
 
 impl Selector {
     pub fn new() -> io::Result<Selector> {
-        // offset by 1 to avoid choosing 0 as the id of a selector
-        let id = NEXT_ID.fetch_add(1, Ordering::Relaxed) + 1;
-        let kq = unsafe { cvt(libc::kqueue())? };
-        drop(set_cloexec(kq));
-
-        Ok(Selector {
-            id,
-            kq,
-        })
+        syscall!(kqueue())
+            .and_then(|kq| syscall!(fcntl(kq, libc::F_SETFD, libc::FD_CLOEXEC)).map(|_| kq))
+            .map(|kq| Selector {
+                #[cfg(debug_assertions)]
+                id: NEXT_ID.fetch_add(1, Ordering::Relaxed),
+                kq,
+            })
     }
 
+    #[cfg(debug_assertions)]
     pub fn id(&self) -> usize {
         self.id
     }
 
-    pub fn select(&self, evts: &mut Events, awakener: Token, timeout: Option<Duration>) -> io::Result<bool> {
-        let timeout = timeout.map(|to| {
-            libc::timespec {
-                tv_sec: cmp::min(to.as_secs(), time_t::max_value() as u64) as time_t,
-                // `Duration::subsec_nanos` is guaranteed to be less than one
-                // billion (the number of nanoseconds in a second), making the
-                // cast to i32 safe. The cast itself is needed for platforms
-                // where C's long is only 32 bits.
-                tv_nsec: libc::c_long::from(to.subsec_nanos() as i32),
-            }
+    pub fn try_clone(&self) -> io::Result<Selector> {
+        syscall!(dup(self.kq)).map(|kq| Selector {
+            // It's the same selector, so we use the same id.
+            #[cfg(debug_assertions)]
+            id: self.id,
+            kq,
+        })
+    }
+
+    pub fn select(&self, events: &mut Events, timeout: Option<Duration>) -> io::Result<()> {
+        let timeout = timeout.map(|to| libc::timespec {
+            tv_sec: cmp::min(to.as_secs(), libc::time_t::max_value() as u64) as libc::time_t,
+            // `Duration::subsec_nanos` is guaranteed to be less than one
+            // billion (the number of nanoseconds in a second), making the
+            // cast to i32 safe. The cast itself is needed for platforms
+            // where C's long is only 32 bits.
+            tv_nsec: libc::c_long::from(to.subsec_nanos() as i32),
         });
-        let timeout = timeout.as_ref().map(|s| s as *const _).unwrap_or(ptr::null_mut());
+        let timeout = timeout
+            .as_ref()
+            .map(|s| s as *const _)
+            .unwrap_or(ptr::null_mut());
 
-        evts.clear();
-        unsafe {
-            let cnt = cvt(libc::kevent(self.kq,
-                                            ptr::null(),
-                                            0,
-                                            evts.sys_events.0.as_mut_ptr(),
-                                            evts.sys_events.0.capacity() as Count,
-                                            timeout))?;
-            evts.sys_events.0.set_len(cnt as usize);
-            Ok(evts.coalesce(awakener))
-        }
+        events.clear();
+        syscall!(kevent(
+            self.kq,
+            ptr::null(),
+            0,
+            events.as_mut_ptr(),
+            events.capacity() as Count,
+            timeout,
+        ))
+        .map(|n_events| {
+            // This is safe because `kevent` ensures that `n_events` are
+            // assigned.
+            unsafe { events.set_len(n_events as usize) };
+        })
     }
 
-    pub fn register(&self, fd: RawFd, token: Token, interests: Ready, opts: PollOpt) -> io::Result<()> {
-        trace!("registering; token={:?}; interests={:?}", token, interests);
+    pub fn register(&self, fd: RawFd, token: Token, interests: Interests) -> io::Result<()> {
+        let flags = libc::EV_CLEAR | libc::EV_RECEIPT | libc::EV_ADD;
+        // At most we need two changes, but maybe we only need 1.
+        let mut changes: [MaybeUninit<libc::kevent>; 2] =
+            [MaybeUninit::uninit(), MaybeUninit::uninit()];
+        let mut n_changes = 0;
 
-        let flags = if opts.contains(PollOpt::edge()) { libc::EV_CLEAR } else { 0 } |
-                    if opts.contains(PollOpt::oneshot()) { libc::EV_ONESHOT } else { 0 } |
-                    libc::EV_RECEIPT;
-
-        unsafe {
-            let r = if interests.contains(Ready::readable()) { libc::EV_ADD } else { libc::EV_DELETE };
-            let w = if interests.contains(Ready::writable()) { libc::EV_ADD } else { libc::EV_DELETE };
-            let mut changes = [
-                kevent!(fd, libc::EVFILT_READ, flags | r, usize::from(token)),
-                kevent!(fd, libc::EVFILT_WRITE, flags | w, usize::from(token)),
-            ];
-
-            cvt(libc::kevent(self.kq,
-                             changes.as_ptr(),
-                             changes.len() as Count,
-                             changes.as_mut_ptr(),
-                             changes.len() as Count,
-                             ::std::ptr::null()))?;
-
-            for change in changes.iter() {
-                debug_assert_eq!(change.flags & libc::EV_ERROR, libc::EV_ERROR);
-
-                // Test to see if an error happened
-                if change.data == 0 {
-                    continue
-                }
-
-                // Older versions of OSX (10.11 and 10.10 have been witnessed)
-                // can return EPIPE when registering a pipe file descriptor
-                // where the other end has already disappeared. For example code
-                // that creates a pipe, closes a file descriptor, and then
-                // registers the other end will see an EPIPE returned from
-                // `register`.
-                //
-                // It also turns out that kevent will still report events on the
-                // file descriptor, telling us that it's readable/hup at least
-                // after we've done this registration. As a result we just
-                // ignore `EPIPE` here instead of propagating it.
-                //
-                // More info can be found at carllerche/mio#582
-                if change.data as i32 == libc::EPIPE &&
-                   change.filter == libc::EVFILT_WRITE as Filter {
-                    continue
-                }
-
-                // ignore ENOENT error for EV_DELETE
-                let orig_flags = if change.filter == libc::EVFILT_READ as Filter { r } else { w };
-                if change.data as i32 == libc::ENOENT && orig_flags & libc::EV_DELETE != 0 {
-                    continue
-                }
-
-                return Err(::std::io::Error::from_raw_os_error(change.data as i32));
-            }
-            Ok(())
+        if interests.is_writable() {
+            let kevent = kevent!(fd, libc::EVFILT_WRITE, flags, token.0);
+            changes[n_changes] = MaybeUninit::new(kevent);
+            n_changes += 1;
         }
+
+        if interests.is_readable() {
+            let kevent = kevent!(fd, libc::EVFILT_READ, flags, token.0);
+            changes[n_changes] = MaybeUninit::new(kevent);
+            n_changes += 1;
+        }
+
+        // Older versions of macOS (OS X 10.11 and 10.10 have been witnessed)
+        // can return EPIPE when registering a pipe file descriptor where the
+        // other end has already disappeared. For example code that creates a
+        // pipe, closes a file descriptor, and then registers the other end will
+        // see an EPIPE returned from `register`.
+        //
+        // It also turns out that kevent will still report events on the file
+        // descriptor, telling us that it's readable/hup at least after we've
+        // done this registration. As a result we just ignore `EPIPE` here
+        // instead of propagating it.
+        //
+        // More info can be found at tokio-rs/mio#582.
+        let changes = unsafe {
+            // This is safe because we ensure that at least `n_changes` are in
+            // the array.
+            slice::from_raw_parts_mut(changes[0].as_mut_ptr(), n_changes)
+        };
+        kevent_register(self.kq, changes, &[libc::EPIPE as Data])
     }
 
-    pub fn reregister(&self, fd: RawFd, token: Token, interests: Ready, opts: PollOpt) -> io::Result<()> {
-        // Just need to call register here since EV_ADD is a mod if already
-        // registered
-        self.register(fd, token, interests, opts)
+    pub fn reregister(&self, fd: RawFd, token: Token, interests: Interests) -> io::Result<()> {
+        let flags = libc::EV_CLEAR | libc::EV_RECEIPT;
+        let write_flags = if interests.is_writable() {
+            flags | libc::EV_ADD
+        } else {
+            flags | libc::EV_DELETE
+        };
+        let read_flags = if interests.is_readable() {
+            flags | libc::EV_ADD
+        } else {
+            flags | libc::EV_DELETE
+        };
+
+        let mut changes: [libc::kevent; 2] = [
+            kevent!(fd, libc::EVFILT_WRITE, write_flags, token.0),
+            kevent!(fd, libc::EVFILT_READ, read_flags, token.0),
+        ];
+
+        // Since there is no way to check with which interests the fd was
+        // registered we modify both readable and write, adding it when required
+        // and removing it otherwise, ignoring the ENOENT error when it comes
+        // up. The ENOENT error informs us that a filter we're trying to remove
+        // wasn't there in first place, but we don't really care since our goal
+        // is accomplished.
+        //
+        // For the explanation of ignoring `EPIPE` see `register`.
+        kevent_register(
+            self.kq,
+            &mut changes,
+            &[libc::ENOENT as Data, libc::EPIPE as Data],
+        )
     }
 
     pub fn deregister(&self, fd: RawFd) -> io::Result<()> {
-        unsafe {
-            // EV_RECEIPT is a nice way to apply changes and get back per-event results while not
-            // draining the actual changes.
-            let filter = libc::EV_DELETE | libc::EV_RECEIPT;
-#[cfg(not(target_os = "netbsd"))]
-            let mut changes = [
-                kevent!(fd, libc::EVFILT_READ, filter, ptr::null_mut()),
-                kevent!(fd, libc::EVFILT_WRITE, filter, ptr::null_mut()),
-            ];
+        let flags = libc::EV_DELETE | libc::EV_RECEIPT;
+        let mut changes: [libc::kevent; 2] = [
+            kevent!(fd, libc::EVFILT_WRITE, flags, 0),
+            kevent!(fd, libc::EVFILT_READ, flags, 0),
+        ];
 
-#[cfg(target_os = "netbsd")]
-            let mut changes = [
-                kevent!(fd, libc::EVFILT_READ, filter, 0),
-                kevent!(fd, libc::EVFILT_WRITE, filter, 0),
-            ];
+        // Since there is no way to check with which interests the fd was
+        // registered we remove both filters (readable and writeable) and ignore
+        // the ENOENT error when it comes up. The ENOENT error informs us that
+        // the filter wasn't there in first place, but we don't really care
+        // about that since our goal is to remove it.
+        kevent_register(self.kq, &mut changes, &[libc::ENOENT as Data])
+    }
 
-            cvt(libc::kevent(self.kq,
-                             changes.as_ptr(),
-                             changes.len() as Count,
-                             changes.as_mut_ptr(),
-                             changes.len() as Count,
-                             ::std::ptr::null())).map(|_| ())?;
+    // Used by `Waker`.
+    #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))]
+    pub fn setup_waker(&self, token: Token) -> io::Result<()> {
+        // First attempt to accept user space notifications.
+        let mut kevent = kevent!(
+            0,
+            libc::EVFILT_USER,
+            libc::EV_ADD | libc::EV_CLEAR | libc::EV_RECEIPT,
+            token.0
+        );
 
-            if changes[0].data as i32 == libc::ENOENT && changes[1].data as i32 == libc::ENOENT {
-                return Err(::std::io::Error::from_raw_os_error(changes[0].data as i32));
+        syscall!(kevent(self.kq, &kevent, 1, &mut kevent, 1, ptr::null())).and_then(|_| {
+            if (kevent.flags & libc::EV_ERROR) != 0 && kevent.data != 0 {
+                Err(io::Error::from_raw_os_error(kevent.data as i32))
+            } else {
+                Ok(())
             }
-            for change in changes.iter() {
-                debug_assert_eq!(libc::EV_ERROR & change.flags, libc::EV_ERROR);
-                if change.data != 0 && change.data as i32 != libc::ENOENT {
-                    return Err(::std::io::Error::from_raw_os_error(changes[0].data as i32));
-                }
+        })
+    }
+
+    // Used by `Waker`.
+    #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))]
+    pub fn wake(&self, token: Token) -> io::Result<()> {
+        let mut kevent = kevent!(
+            0,
+            libc::EVFILT_USER,
+            libc::EV_ADD | libc::EV_RECEIPT,
+            token.0
+        );
+        kevent.fflags = libc::NOTE_TRIGGER;
+
+        syscall!(kevent(self.kq, &kevent, 1, &mut kevent, 1, ptr::null())).and_then(|_| {
+            if (kevent.flags & libc::EV_ERROR) != 0 && kevent.data != 0 {
+                Err(io::Error::from_raw_os_error(kevent.data as i32))
+            } else {
+                Ok(())
             }
-            Ok(())
-        }
+        })
     }
 }
 
-impl fmt::Debug for Selector {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt.debug_struct("Selector")
-            .field("id", &self.id)
-            .field("kq", &self.kq)
-            .finish()
+/// Register `changes` with `kq`ueue.
+fn kevent_register(
+    kq: RawFd,
+    changes: &mut [libc::kevent],
+    ignored_errors: &[Data],
+) -> io::Result<()> {
+    syscall!(kevent(
+        kq,
+        changes.as_ptr(),
+        changes.len() as Count,
+        changes.as_mut_ptr(),
+        changes.len() as Count,
+        ptr::null(),
+    ))
+    .map(|_| ())
+    .or_else(|err| {
+        // According to the manual page of FreeBSD: "When kevent() call fails
+        // with EINTR error, all changes in the changelist have been applied",
+        // so we can safely ignore it.
+        if err.raw_os_error() == Some(libc::EINTR) {
+            Ok(())
+        } else {
+            Err(err)
+        }
+    })
+    .and_then(|()| check_errors(&changes, ignored_errors))
+}
+
+/// Check all events for possible errors, it returns the first error found.
+fn check_errors(events: &[libc::kevent], ignored_errors: &[Data]) -> io::Result<()> {
+    for event in events {
+        // We can't use references to packed structures (in checking the ignored
+        // errors), so we need copy the data out before use.
+        let data = event.data;
+        // Check for the error flag, the actual error will be in the `data`
+        // field.
+        if (event.flags & libc::EV_ERROR != 0) && data != 0 && !ignored_errors.contains(&data) {
+            return Err(io::Error::from_raw_os_error(data as i32));
+        }
     }
+    Ok(())
 }
 
 impl AsRawFd for Selector {
@@ -217,144 +298,110 @@ impl AsRawFd for Selector {
 
 impl Drop for Selector {
     fn drop(&mut self) {
-        unsafe {
-            let _ = libc::close(self.kq);
+        if let Err(err) = syscall!(close(self.kq)) {
+            error!("error closing kqueue: {}", err);
         }
     }
 }
 
-pub struct Events {
-    sys_events: KeventList,
-    events: Vec<Event>,
-    event_map: HashMap<Token, usize>,
-}
+pub type Event = libc::kevent;
 
-struct KeventList(Vec<libc::kevent>);
+pub mod event {
+    use crate::sys::Event;
+    use crate::Token;
 
-unsafe impl Send for KeventList {}
-unsafe impl Sync for KeventList {}
-
-impl Events {
-    pub fn with_capacity(cap: usize) -> Events {
-        Events {
-            sys_events: KeventList(Vec::with_capacity(cap)),
-            events: Vec::with_capacity(cap),
-            event_map: HashMap::with_capacity(cap)
-        }
+    pub fn token(event: &Event) -> Token {
+        Token(event.udata as usize)
     }
 
-    #[inline]
-    pub fn len(&self) -> usize {
-        self.events.len()
-    }
-
-    #[inline]
-    pub fn capacity(&self) -> usize {
-        self.events.capacity()
-    }
-
-    #[inline]
-    pub fn is_empty(&self) -> bool {
-        self.events.is_empty()
-    }
-
-    pub fn get(&self, idx: usize) -> Option<Event> {
-        self.events.get(idx).cloned()
-    }
-
-    fn coalesce(&mut self, awakener: Token) -> bool {
-        let mut ret = false;
-        self.events.clear();
-        self.event_map.clear();
-
-        for e in self.sys_events.0.iter() {
-            let token = Token(e.udata as usize);
-            let len = self.events.len();
-
-            if token == awakener {
-                // TODO: Should this return an error if event is an error. It
-                // is not critical as spurious wakeups are permitted.
-                ret = true;
-                continue;
-            }
-
-            let idx = *self.event_map.entry(token)
-                .or_insert(len);
-
-            if idx == len {
-                // New entry, insert the default
-                self.events.push(Event::new(Ready::empty(), token));
-
-            }
-
-            if e.flags & libc::EV_ERROR != 0 {
-                event::kind_mut(&mut self.events[idx]).insert(*UnixReady::error());
-            }
-
-            if e.filter == libc::EVFILT_READ as Filter {
-                event::kind_mut(&mut self.events[idx]).insert(Ready::readable());
-            } else if e.filter == libc::EVFILT_WRITE as Filter {
-                event::kind_mut(&mut self.events[idx]).insert(Ready::writable());
-            }
-#[cfg(any(target_os = "dragonfly",
-    target_os = "freebsd", target_os = "ios", target_os = "macos"))]
+    pub fn is_readable(event: &Event) -> bool {
+        event.filter == libc::EVFILT_READ || {
+            #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))]
+            // Used by the `Awakener`. On platforms that use `eventfd` or a unix
+            // pipe it will emit a readable event so we'll fake that here as
+            // well.
             {
-                if e.filter == libc::EVFILT_AIO {
-                    event::kind_mut(&mut self.events[idx]).insert(UnixReady::aio());
-                }
+                event.filter == libc::EVFILT_USER
             }
-#[cfg(any(target_os = "freebsd"))]
+            #[cfg(not(any(target_os = "freebsd", target_os = "ios", target_os = "macos")))]
             {
-                if e.filter == libc::EVFILT_LIO {
-                    event::kind_mut(&mut self.events[idx]).insert(UnixReady::lio());
-                }
+                false
             }
         }
-
-        ret
     }
 
-    pub fn push_event(&mut self, event: Event) {
-        self.events.push(event);
+    pub fn is_writable(event: &Event) -> bool {
+        event.filter == libc::EVFILT_WRITE
     }
 
-    pub fn clear(&mut self) {
-        self.sys_events.0.truncate(0);
-        self.events.truncate(0);
-        self.event_map.clear();
+    pub fn is_error(event: &Event) -> bool {
+        (event.flags & libc::EV_ERROR) != 0 ||
+            // When the read end of the socket is closed, EV_EOF is set on
+            // flags, and fflags contains the error if there is one.
+            (event.flags & libc::EV_EOF) != 0 && event.fflags != 0
     }
-}
 
-impl fmt::Debug for Events {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt.debug_struct("Events")
-            .field("len", &self.sys_events.0.len())
-            .finish()
+    pub fn is_hup(_: &Event) -> bool {
+        // Not supported.
+        false
+    }
+
+    pub fn is_read_hup(event: &Event) -> bool {
+        event.filter == libc::EVFILT_READ && (event.flags & libc::EV_EOF) != 0
+    }
+
+    pub fn is_priority(_: &Event) -> bool {
+        // kqueue doesn't have priority indicators.
+        false
+    }
+
+    #[allow(unused_variables)] // `event` is not used on some platforms.
+    pub fn is_aio(event: &Event) -> bool {
+        #[cfg(any(
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "ios",
+            target_os = "macos"
+        ))]
+        {
+            event.filter == libc::EVFILT_AIO
+        }
+        #[cfg(not(any(
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "ios",
+            target_os = "macos"
+        )))]
+        {
+            false
+        }
+    }
+
+    #[allow(unused_variables)] // `event` is only used on FreeBSD.
+    pub fn is_lio(event: &Event) -> bool {
+        #[cfg(target_os = "freebsd")]
+        {
+            event.filter == libc::EVFILT_LIO
+        }
+        #[cfg(not(target_os = "freebsd"))]
+        {
+            false
+        }
     }
 }
 
 #[test]
 fn does_not_register_rw() {
-    use {Poll, Ready, PollOpt, Token};
-    use unix::EventedFd;
+    use crate::unix::SourceFd;
+    use crate::{Poll, Token};
 
     let kq = unsafe { libc::kqueue() };
-    let kqf = EventedFd(&kq);
+    let kqf = SourceFd(&kq);
     let poll = Poll::new().unwrap();
 
-    // registering kqueue fd will fail if write is requested (On anything but some versions of OS
-    // X)
-    poll.register(&kqf, Token(1234), Ready::readable(),
-                  PollOpt::edge() | PollOpt::oneshot()).unwrap();
-}
-
-#[cfg(any(target_os = "dragonfly",
-    target_os = "freebsd", target_os = "ios", target_os = "macos"))]
-#[test]
-fn test_coalesce_aio() {
-    let mut events = Events::with_capacity(1);
-    events.sys_events.0.push(kevent!(0x1234, libc::EVFILT_AIO, 0, 42));
-    events.coalesce(Token(0));
-    assert!(events.events[0].readiness() == UnixReady::aio().into());
-    assert!(events.events[0].token() == Token(42));
+    // Registering kqueue fd will fail if write is requested (On anything but
+    // some versions of macOS).
+    poll.registry()
+        .register(&kqf, Token(1234), Interests::READABLE)
+        .unwrap();
 }

src/sys/unix/mod.rs

@@ -1,91 +1,56 @@
-use libc::{self, c_int};
-
-#[macro_use]
-pub mod dlsym;
+/// Helper macro to execute a system call that returns an `io::Result`.
+//
+// Macro must be defined before any modules that uses them.
+macro_rules! syscall {
+    ($fn: ident ( $($arg: expr),* $(,)* ) ) => {{
+        let res = unsafe { libc::$fn($($arg, )*) };
+        if res == -1 {
+            Err(io::Error::last_os_error())
+        } else {
+            Ok(res)
+        }
+    }};
+}
 
 #[cfg(any(target_os = "linux", target_os = "android", target_os = "solaris"))]
 mod epoll;
 
 #[cfg(any(target_os = "linux", target_os = "android", target_os = "solaris"))]
-pub use self::epoll::{Events, Selector};
+pub use self::epoll::{event, Event, Selector};
 
-#[cfg(any(target_os = "bitrig", target_os = "dragonfly",
-          target_os = "freebsd", target_os = "ios", target_os = "macos",
-          target_os = "netbsd", target_os = "openbsd"))]
+#[cfg(any(
+    target_os = "bitrig",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "ios",
+    target_os = "macos",
+    target_os = "netbsd",
+    target_os = "openbsd"
+))]
 mod kqueue;
 
-#[cfg(any(target_os = "bitrig", target_os = "dragonfly",
-          target_os = "freebsd", target_os = "ios", target_os = "macos",
-          target_os = "netbsd", target_os = "openbsd"))]
-pub use self::kqueue::{Events, Selector};
+#[cfg(any(
+    target_os = "bitrig",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "ios",
+    target_os = "macos",
+    target_os = "netbsd",
+    target_os = "openbsd"
+))]
+pub use self::kqueue::{event, Event, Selector};
 
-mod awakener;
-mod eventedfd;
-mod io;
-mod ready;
-mod tcp;
+mod net;
+mod sourcefd;
+mod tcp_listener;
+mod tcp_stream;
 mod udp;
-mod uio;
+mod waker;
 
-#[cfg(feature = "with-deprecated")]
-mod uds;
-
-pub use self::awakener::Awakener;
-pub use self::eventedfd::EventedFd;
-pub use self::io::{Io, set_nonblock};
-pub use self::ready::{UnixReady, READY_ALL};
-pub use self::tcp::{TcpStream, TcpListener};
+pub use self::sourcefd::SourceFd;
+pub use self::tcp_listener::TcpListener;
+pub use self::tcp_stream::TcpStream;
 pub use self::udp::UdpSocket;
+pub use self::waker::Waker;
 
-#[cfg(feature = "with-deprecated")]
-pub use self::uds::UnixSocket;
-
-pub use iovec::IoVec;
-
-use std::os::unix::io::FromRawFd;
-
-pub fn pipe() -> ::io::Result<(Io, Io)> {
-    // Use pipe2 for atomically setting O_CLOEXEC if we can, but otherwise
-    // just fall back to using `pipe`.
-    dlsym!(fn pipe2(*mut c_int, c_int) -> c_int);
-
-    let mut pipes = [0; 2];
-    let flags = libc::O_NONBLOCK | libc::O_CLOEXEC;
-    unsafe {
-        match pipe2.get() {
-            Some(pipe2_fn) => {
-                cvt(pipe2_fn(pipes.as_mut_ptr(), flags))?;
-            }
-            None => {
-                cvt(libc::pipe(pipes.as_mut_ptr()))?;
-                libc::fcntl(pipes[0], libc::F_SETFL, flags);
-                libc::fcntl(pipes[1], libc::F_SETFL, flags);
-            }
-        }
-    }
-
-    unsafe {
-        Ok((Io::from_raw_fd(pipes[0]), Io::from_raw_fd(pipes[1])))
-    }
-}
-
-trait IsMinusOne {
-    fn is_minus_one(&self) -> bool;
-}
-
-impl IsMinusOne for i32 {
-    fn is_minus_one(&self) -> bool { *self == -1 }
-}
-impl IsMinusOne for isize {
-    fn is_minus_one(&self) -> bool { *self == -1 }
-}
-
-fn cvt<T: IsMinusOne>(t: T) -> ::io::Result<T> {
-    use std::io;
-
-    if t.is_minus_one() {
-        Err(io::Error::last_os_error())
-    } else {
-        Ok(t)
-    }
-}
+pub type Events = Vec<Event>;

src/sys/unix/net.rs

@@ -0,0 +1,55 @@
+use std::io;
+use std::mem::size_of_val;
+use std::net::SocketAddr;
+
+/// Create a new non-blocking socket.
+pub fn new_socket(addr: SocketAddr, socket_type: libc::c_int) -> io::Result<libc::c_int> {
+    let domain = match addr {
+        SocketAddr::V4(..) => libc::AF_INET,
+        SocketAddr::V6(..) => libc::AF_INET6,
+    };
+
+    #[cfg(any(
+        target_os = "android",
+        target_os = "bitrig",
+        target_os = "dragonfly",
+        target_os = "freebsd",
+        target_os = "linux",
+        target_os = "netbsd",
+        target_os = "openbsd"
+    ))]
+    let socket_type = socket_type | libc::SOCK_NONBLOCK | libc::SOCK_CLOEXEC;
+
+    // Gives a warning for platforms without SOCK_NONBLOCK.
+    #[allow(clippy::let_and_return)]
+    let socket = syscall!(socket(domain, socket_type, 0));
+
+    // Darwin doesn't have SOCK_NONBLOCK or SOCK_CLOEXEC. Not sure about
+    // Solaris, couldn't find anything online.
+    #[cfg(any(target_os = "ios", target_os = "macos", target_os = "solaris"))]
+    let socket = socket.and_then(|socket| {
+        // For platforms that don't support flags in socket, we need to
+        // set the flags ourselves.
+        syscall!(fcntl(
+            socket,
+            libc::F_SETFL,
+            libc::O_NONBLOCK | libc::O_CLOEXEC
+        ))
+        .map(|_| socket)
+    });
+
+    socket
+}
+
+pub fn socket_addr(addr: &SocketAddr) -> (*const libc::sockaddr, libc::socklen_t) {
+    match addr {
+        SocketAddr::V4(ref addr) => (
+            addr as *const _ as *const libc::sockaddr,
+            size_of_val(addr) as libc::socklen_t,
+        ),
+        SocketAddr::V6(ref addr) => (
+            addr as *const _ as *const libc::sockaddr,
+            size_of_val(addr) as libc::socklen_t,
+        ),
+    }
+}

src/sys/unix/ready.rs

@@ -1,499 +0,0 @@
-use event_imp::{Ready, ready_as_usize, ready_from_usize};
-
-use std::ops;
-use std::fmt;
-
-/// Unix specific extensions to `Ready`
-///
-/// Provides additional readiness event kinds that are available on unix
-/// platforms. Unix platforms are able to provide readiness events for
-/// additional socket events, such as HUP and error.
-///
-/// HUP events occur when the remote end of a socket hangs up. In the TCP case,
-/// this occurs when the remote end of a TCP socket shuts down writes.
-///
-/// Error events occur when the socket enters an error state. In this case, the
-/// socket will also receive a readable or writable event. Reading or writing to
-/// the socket will result in an error.
-///
-/// Conversion traits are implemented between `Ready` and `UnixReady`. See the
-/// examples.
-///
-/// For high level documentation on polling and readiness, see [`Poll`].
-///
-/// # Examples
-///
-/// Most of the time, all that is needed is using bit operations
-///
-/// ```
-/// use mio::Ready;
-/// use mio::unix::UnixReady;
-///
-/// let ready = Ready::readable() | UnixReady::hup();
-///
-/// assert!(ready.is_readable());
-/// assert!(UnixReady::from(ready).is_hup());
-/// ```
-///
-/// Basic conversion between ready types.
-///
-/// ```
-/// use mio::Ready;
-/// use mio::unix::UnixReady;
-///
-/// // Start with a portable ready
-/// let ready = Ready::readable();
-///
-/// // Convert to a unix ready, adding HUP
-/// let mut unix_ready = UnixReady::from(ready) | UnixReady::hup();
-///
-/// unix_ready.insert(UnixReady::error());
-///
-/// // `unix_ready` maintains readable interest
-/// assert!(unix_ready.is_readable());
-/// assert!(unix_ready.is_hup());
-/// assert!(unix_ready.is_error());
-///
-/// // Convert back to `Ready`
-/// let ready = Ready::from(unix_ready);
-///
-/// // Readable is maintained
-/// assert!(ready.is_readable());
-/// ```
-///
-/// Registering readable and error interest on a socket
-///
-/// ```
-/// # use std::error::Error;
-/// # fn try_main() -> Result<(), Box<Error>> {
-/// use mio::{Ready, Poll, PollOpt, Token};
-/// use mio::net::TcpStream;
-/// use mio::unix::UnixReady;
-///
-/// let addr = "216.58.193.68:80".parse()?;
-/// let socket = TcpStream::connect(&addr)?;
-///
-/// let poll = Poll::new()?;
-///
-/// poll.register(&socket,
-///               Token(0),
-///               Ready::readable() | UnixReady::error(),
-///               PollOpt::edge())?;
-/// #     Ok(())
-/// # }
-/// #
-/// # fn main() {
-/// #     try_main().unwrap();
-/// # }
-/// ```
-///
-/// [`Poll`]: ../struct.Poll.html
-/// [readiness]: struct.Poll.html#readiness-operations
-#[derive(Copy, PartialEq, Eq, Clone, PartialOrd, Ord)]
-pub struct UnixReady(Ready);
-
-const ERROR: usize = 0b00_0100;
-const HUP: usize   = 0b00_1000;
-
-#[cfg(any(target_os = "dragonfly",
-    target_os = "freebsd", target_os = "ios", target_os = "macos"))]
-const AIO: usize   = 0b01_0000;
-
-#[cfg(not(any(target_os = "dragonfly",
-    target_os = "freebsd", target_os = "ios", target_os = "macos")))]
-const AIO: usize   = 0b00_0000;
-
-#[cfg(any(target_os = "freebsd"))]
-const LIO: usize   = 0b10_0000;
-
-#[cfg(not(any(target_os = "freebsd")))]
-const LIO: usize   = 0b00_0000;
-
-#[cfg(any(target_os = "linux", target_os = "android", target_os = "solaris"))]
-const PRI: usize = 0b100_0000;
-
-#[cfg(not(any(target_os = "linux", target_os = "android", target_os = "solaris")))]
-const PRI: usize = 0;
-
-// Export to support `Ready::all`
-pub const READY_ALL: usize = ERROR | HUP | AIO | LIO | PRI;
-
-#[test]
-fn test_ready_all() {
-    let readable = Ready::readable().as_usize();
-    let writable = Ready::writable().as_usize();
-
-    assert_eq!(
-        READY_ALL | readable | writable,
-        ERROR + HUP + AIO + LIO + PRI + readable + writable
-    );
-
-    // Issue #896.
-    #[cfg(any(target_os = "linux", target_os = "android", target_os = "solaris"))]
-    assert!(!Ready::from(UnixReady::priority()).is_writable());
-}
-
-impl UnixReady {
-    /// Returns a `Ready` representing AIO completion readiness
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::aio();
-    ///
-    /// assert!(ready.is_aio());
-    /// ```
-    ///
-    /// [`Poll`]: ../struct.Poll.html
-    #[inline]
-    #[cfg(any(target_os = "dragonfly",
-        target_os = "freebsd", target_os = "ios", target_os = "macos"))]
-    pub fn aio() -> UnixReady {
-        UnixReady(ready_from_usize(AIO))
-    }
-
-    #[cfg(not(any(target_os = "dragonfly",
-        target_os = "freebsd", target_os = "ios", target_os = "macos")))]
-    #[deprecated(since = "0.6.12", note = "this function is now platform specific")]
-    #[doc(hidden)]
-    pub fn aio() -> UnixReady {
-        UnixReady(Ready::empty())
-    }
-
-    /// Returns a `Ready` representing error readiness.
-    ///
-    /// **Note that only readable and writable readiness is guaranteed to be
-    /// supported on all platforms**. This means that `error` readiness
-    /// should be treated as a hint. For more details, see [readiness] in the
-    /// poll documentation.
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::error();
-    ///
-    /// assert!(ready.is_error());
-    /// ```
-    ///
-    /// [`Poll`]: ../struct.Poll.html
-    /// [readiness]: ../struct.Poll.html#readiness-operations
-    #[inline]
-    pub fn error() -> UnixReady {
-        UnixReady(ready_from_usize(ERROR))
-    }
-
-    /// Returns a `Ready` representing HUP readiness.
-    ///
-    /// A HUP (or hang-up) signifies that a stream socket **peer** closed the
-    /// connection, or shut down the writing half of the connection.
-    ///
-    /// **Note that only readable and writable readiness is guaranteed to be
-    /// supported on all platforms**. This means that `hup` readiness
-    /// should be treated as a hint. For more details, see [readiness] in the
-    /// poll documentation. It is also unclear if HUP readiness will remain in 0.7. See
-    /// [here][issue-941].
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::hup();
-    ///
-    /// assert!(ready.is_hup());
-    /// ```
-    ///
-    /// [`Poll`]: ../struct.Poll.html
-    /// [readiness]: ../struct.Poll.html#readiness-operations
-    /// [issue-941]: https://github.com/tokio-rs/mio/issues/941
-    #[inline]
-    pub fn hup() -> UnixReady {
-        UnixReady(ready_from_usize(HUP))
-    }
-
-    /// Returns a `Ready` representing LIO completion readiness
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::lio();
-    ///
-    /// assert!(ready.is_lio());
-    /// ```
-    ///
-    /// [`Poll`]: struct.Poll.html
-    #[inline]
-    #[cfg(any(target_os = "freebsd"))]
-    pub fn lio() -> UnixReady {
-        UnixReady(ready_from_usize(LIO))
-    }
-
-    /// Returns a `Ready` representing priority (`EPOLLPRI`) readiness
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::priority();
-    ///
-    /// assert!(ready.is_priority());
-    /// ```
-    ///
-    /// [`Poll`]: struct.Poll.html
-    #[inline]
-    #[cfg(any(target_os = "linux",
-        target_os = "android", target_os = "solaris"))]
-    pub fn priority() -> UnixReady {
-        UnixReady(ready_from_usize(PRI))
-    }
-
-    /// Returns true if `Ready` contains AIO readiness
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::aio();
-    ///
-    /// assert!(ready.is_aio());
-    /// ```
-    ///
-    /// [`Poll`]: ../struct.Poll.html
-    #[inline]
-    #[cfg(any(target_os = "dragonfly",
-        target_os = "freebsd", target_os = "ios", target_os = "macos"))]
-    pub fn is_aio(&self) -> bool {
-        self.contains(ready_from_usize(AIO))
-    }
-
-    #[deprecated(since = "0.6.12", note = "this function is now platform specific")]
-    #[cfg(feature = "with-deprecated")]
-    #[cfg(not(any(target_os = "dragonfly",
-        target_os = "freebsd", target_os = "ios", target_os = "macos")))]
-    #[doc(hidden)]
-    pub fn is_aio(&self) -> bool {
-        false
-    }
-
-    /// Returns true if the value includes error readiness
-    ///
-    /// **Note that only readable and writable readiness is guaranteed to be
-    /// supported on all platforms**. This means that `error` readiness should
-    /// be treated as a hint. For more details, see [readiness] in the poll
-    /// documentation.
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::error();
-    ///
-    /// assert!(ready.is_error());
-    /// ```
-    ///
-    /// [`Poll`]: ../struct.Poll.html
-    /// [readiness]: ../struct.Poll.html#readiness-operations
-    #[inline]
-    pub fn is_error(&self) -> bool {
-        self.contains(ready_from_usize(ERROR))
-    }
-
-    /// Returns true if the value includes HUP readiness
-    ///
-    /// A HUP (or hang-up) signifies that a stream socket **peer** closed the
-    /// connection, or shut down the writing half of the connection.
-    ///
-    /// **Note that only readable and writable readiness is guaranteed to be
-    /// supported on all platforms**. This means that `hup` readiness
-    /// should be treated as a hint. For more details, see [readiness] in the
-    /// poll documentation.
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::hup();
-    ///
-    /// assert!(ready.is_hup());
-    /// ```
-    ///
-    /// [`Poll`]: ../struct.Poll.html
-    /// [readiness]: ../struct.Poll.html#readiness-operations
-    #[inline]
-    pub fn is_hup(&self) -> bool {
-        self.contains(ready_from_usize(HUP))
-    }
-
-    /// Returns true if `Ready` contains LIO readiness
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::lio();
-    ///
-    /// assert!(ready.is_lio());
-    /// ```
-    #[inline]
-    #[cfg(any(target_os = "freebsd"))]
-    pub fn is_lio(&self) -> bool {
-        self.contains(ready_from_usize(LIO))
-    }
-
-    /// Returns true if `Ready` contains priority (`EPOLLPRI`) readiness
-    ///
-    /// See [`Poll`] for more documentation on polling.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use mio::unix::UnixReady;
-    ///
-    /// let ready = UnixReady::priority();
-    ///
-    /// assert!(ready.is_priority());
-    /// ```
-    ///
-    /// [`Poll`]: struct.Poll.html
-    #[inline]
-    #[cfg(any(target_os = "linux",
-        target_os = "android", target_os = "solaris"))]
-    pub fn is_priority(&self) -> bool {
-        self.contains(ready_from_usize(PRI))
-    }
-}
-
-impl From<Ready> for UnixReady {
-    fn from(src: Ready) -> UnixReady {
-        UnixReady(src)
-    }
-}
-
-impl From<UnixReady> for Ready {
-    fn from(src: UnixReady) -> Ready {
-        src.0
-    }
-}
-
-impl ops::Deref for UnixReady {
-    type Target = Ready;
-
-    fn deref(&self) -> &Ready {
-        &self.0
-    }
-}
-
-impl ops::DerefMut for UnixReady {
-    fn deref_mut(&mut self) -> &mut Ready {
-        &mut self.0
-    }
-}
-
-impl ops::BitOr for UnixReady {
-    type Output = UnixReady;
-
-    #[inline]
-    fn bitor(self, other: UnixReady) -> UnixReady {
-        (self.0 | other.0).into()
-    }
-}
-
-impl ops::BitXor for UnixReady {
-    type Output = UnixReady;
-
-    #[inline]
-    fn bitxor(self, other: UnixReady) -> UnixReady {
-        (self.0 ^ other.0).into()
-    }
-}
-
-impl ops::BitAnd for UnixReady {
-    type Output = UnixReady;
-
-    #[inline]
-    fn bitand(self, other: UnixReady) -> UnixReady {
-        (self.0 & other.0).into()
-    }
-}
-
-impl ops::Sub for UnixReady {
-    type Output = UnixReady;
-
-    #[inline]
-    fn sub(self, other: UnixReady) -> UnixReady {
-        ready_from_usize(ready_as_usize(self.0) & !ready_as_usize(other.0)).into()
-    }
-}
-
-#[deprecated(since = "0.6.10", note = "removed")]
-#[cfg(feature = "with-deprecated")]
-#[doc(hidden)]
-impl ops::Not for UnixReady {
-    type Output = UnixReady;
-
-    #[inline]
-    fn not(self) -> UnixReady {
-        (!self.0).into()
-    }
-}
-
-impl fmt::Debug for UnixReady {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let mut one = false;
-        let flags = [
-            (UnixReady(Ready::readable()), "Readable"),
-            (UnixReady(Ready::writable()), "Writable"),
-            (UnixReady::error(), "Error"),
-            (UnixReady::hup(), "Hup"),
-            #[allow(deprecated)]
-            (UnixReady::aio(), "Aio"),
-            #[cfg(any(target_os = "linux",
-                target_os = "android", target_os = "solaris"))]
-            (UnixReady::priority(), "Priority"),
-        ];
-
-        for &(flag, msg) in &flags {
-            if self.contains(flag) {
-                if one { write!(fmt, " | ")? }
-                write!(fmt, "{}", msg)?;
-
-                one = true
-            }
-        }
-
-        if !one {
-            fmt.write_str("(empty)")?;
-        }
-
-        Ok(())
-    }
-}

src/sys/unix/sourcefd.rs

@@ -0,0 +1,103 @@
+use crate::{event, poll, Interests, Registry, Token};
+
+use std::io;
+use std::os::unix::io::RawFd;
+
+/// Adapter for [`RawFd`] providing an [`event::Source`] implementation.
+///
+/// `SourceFd` enables registering any type with an FD with [`Poll`].
+///
+/// While only implementations for TCP and UDP are provided, Mio supports
+/// registering any FD that can be registered with the underlying OS selector.
+/// `SourceFd` provides the necessary bridge.
+///
+/// Note that `SourceFd` takes a `&RawFd`. This is because `SourceFd` **does
+/// not** take ownership of the FD. Specifically, it will not manage any
+/// lifecycle related operations, such as closing the FD on drop. It is expected
+/// that the `SourceFd` is constructed right before a call to
+/// [`Registry::register`]. See the examples for more detail.
+///
+/// [`event::Source`]: crate::event::Source
+/// [`Poll`]: crate::Poll
+/// [`Registry::register`]: crate::Registry::register
+///
+/// # Examples
+///
+/// Basic usage.
+///
+/// ```
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Interests, Poll, Token};
+/// use mio::unix::SourceFd;
+///
+/// use std::os::unix::io::AsRawFd;
+/// use std::net::TcpListener;
+///
+/// // Bind a std listener
+/// let listener = TcpListener::bind("127.0.0.1:0")?;
+///
+/// let poll = Poll::new()?;
+///
+/// // Register the listener
+/// poll.registry().register(
+///     &SourceFd(&listener.as_raw_fd()),
+///     Token(0),
+///     Interests::READABLE)?;
+/// #     Ok(())
+/// # }
+/// ```
+///
+/// Implementing [`event::Source`] for a custom type backed by a [`RawFd`].
+///
+/// ```
+/// use mio::{event, Interests, Registry, Token};
+/// use mio::unix::SourceFd;
+///
+/// use std::os::unix::io::RawFd;
+/// use std::io;
+///
+/// # #[allow(dead_code)]
+/// pub struct MyIo {
+///     fd: RawFd,
+/// }
+///
+/// impl event::Source for MyIo {
+///     fn register(&self, registry: &Registry, token: Token, interests: Interests)
+///         -> io::Result<()>
+///     {
+///         SourceFd(&self.fd).register(registry, token, interests)
+///     }
+///
+///     fn reregister(&self, registry: &Registry, token: Token, interests: Interests)
+///         -> io::Result<()>
+///     {
+///         SourceFd(&self.fd).reregister(registry, token, interests)
+///     }
+///
+///     fn deregister(&self, registry: &Registry) -> io::Result<()> {
+///         SourceFd(&self.fd).deregister(registry)
+///     }
+/// }
+/// ```
+#[derive(Debug)]
+pub struct SourceFd<'a>(pub &'a RawFd);
+
+impl<'a> event::Source for SourceFd<'a> {
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()> {
+        poll::selector(registry).register(*self.0, token, interests)
+    }
+
+    fn reregister(
+        &self,
+        registry: &Registry,
+        token: Token,
+        interests: Interests,
+    ) -> io::Result<()> {
+        poll::selector(registry).reregister(*self.0, token, interests)
+    }
+
+    fn deregister(&self, registry: &Registry) -> io::Result<()> {
+        poll::selector(registry).deregister(*self.0)
+    }
+}

src/sys/unix/tcp.rs

@@ -1,286 +0,0 @@
-use std::fmt;
-use std::io::{Read, Write};
-use std::net::{self, SocketAddr};
-use std::os::unix::io::{RawFd, FromRawFd, IntoRawFd, AsRawFd};
-use std::time::Duration;
-
-use libc;
-use net2::TcpStreamExt;
-use iovec::IoVec;
-
-use {io, Ready, Poll, PollOpt, Token};
-use event::Evented;
-
-use sys::unix::eventedfd::EventedFd;
-use sys::unix::io::set_nonblock;
-use sys::unix::uio::VecIo;
-
-pub struct TcpStream {
-    inner: net::TcpStream,
-}
-
-pub struct TcpListener {
-    inner: net::TcpListener,
-}
-
-impl TcpStream {
-    pub fn connect(stream: net::TcpStream, addr: &SocketAddr) -> io::Result<TcpStream> {
-        set_nonblock(stream.as_raw_fd())?;
-
-        match stream.connect(addr) {
-            Ok(..) => {}
-            Err(ref e) if e.raw_os_error() == Some(libc::EINPROGRESS) => {}
-            Err(e) => return Err(e),
-        }
-
-        Ok(TcpStream {
-            inner: stream,
-        })
-    }
-
-    pub fn from_stream(stream: net::TcpStream) -> TcpStream {
-        TcpStream {
-            inner: stream,
-        }
-    }
-
-    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
-        self.inner.peer_addr()
-    }
-
-    pub fn local_addr(&self) -> io::Result<SocketAddr> {
-        self.inner.local_addr()
-    }
-
-    pub fn try_clone(&self) -> io::Result<TcpStream> {
-        self.inner.try_clone().map(|s| {
-            TcpStream {
-                inner: s,
-            }
-        })
-    }
-
-    pub fn shutdown(&self, how: net::Shutdown) -> io::Result<()> {
-        self.inner.shutdown(how)
-    }
-
-    pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
-        self.inner.set_nodelay(nodelay)
-    }
-
-    pub fn nodelay(&self) -> io::Result<bool> {
-        self.inner.nodelay()
-    }
-
-    pub fn set_recv_buffer_size(&self, size: usize) -> io::Result<()> {
-        self.inner.set_recv_buffer_size(size)
-    }
-
-    pub fn recv_buffer_size(&self) -> io::Result<usize> {
-        self.inner.recv_buffer_size()
-    }
-
-    pub fn set_send_buffer_size(&self, size: usize) -> io::Result<()> {
-        self.inner.set_send_buffer_size(size)
-    }
-
-    pub fn send_buffer_size(&self) -> io::Result<usize> {
-        self.inner.send_buffer_size()
-    }
-
-    pub fn set_keepalive(&self, keepalive: Option<Duration>) -> io::Result<()> {
-        self.inner.set_keepalive(keepalive)
-    }
-
-    pub fn keepalive(&self) -> io::Result<Option<Duration>> {
-        self.inner.keepalive()
-    }
-
-    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
-        self.inner.set_ttl(ttl)
-    }
-
-    pub fn ttl(&self) -> io::Result<u32> {
-        self.inner.ttl()
-    }
-
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.inner.set_only_v6(only_v6)
-    }
-
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.inner.only_v6()
-    }
-
-    pub fn set_linger(&self, dur: Option<Duration>) -> io::Result<()> {
-        self.inner.set_linger(dur)
-    }
-
-    pub fn linger(&self) -> io::Result<Option<Duration>> {
-        self.inner.linger()
-    }
-
-    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        self.inner.take_error()
-    }
-
-    pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
-        self.inner.peek(buf)
-    }
-
-    pub fn readv(&self, bufs: &mut [&mut IoVec]) -> io::Result<usize> {
-        self.inner.readv(bufs)
-    }
-
-    pub fn writev(&self, bufs: &[&IoVec]) -> io::Result<usize> {
-        self.inner.writev(bufs)
-    }
-}
-
-impl<'a> Read for &'a TcpStream {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        (&self.inner).read(buf)
-    }
-}
-
-impl<'a> Write for &'a TcpStream {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        (&self.inner).write(buf)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        (&self.inner).flush()
-    }
-}
-
-impl Evented for TcpStream {
-    fn register(&self, poll: &Poll, token: Token,
-                interest: Ready, opts: PollOpt) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token,
-                  interest: Ready, opts: PollOpt) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).deregister(poll)
-    }
-}
-
-impl fmt::Debug for TcpStream {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Debug::fmt(&self.inner, f)
-    }
-}
-
-impl FromRawFd for TcpStream {
-    unsafe fn from_raw_fd(fd: RawFd) -> TcpStream {
-        TcpStream {
-            inner: net::TcpStream::from_raw_fd(fd),
-        }
-    }
-}
-
-impl IntoRawFd for TcpStream {
-    fn into_raw_fd(self) -> RawFd {
-        self.inner.into_raw_fd()
-    }
-}
-
-impl AsRawFd for TcpStream {
-    fn as_raw_fd(&self) -> RawFd {
-        self.inner.as_raw_fd()
-    }
-}
-
-impl TcpListener {
-    pub fn new(inner: net::TcpListener) -> io::Result<TcpListener> {
-        set_nonblock(inner.as_raw_fd())?;
-        Ok(TcpListener {
-            inner,
-        })
-    }
-
-    pub fn local_addr(&self) -> io::Result<SocketAddr> {
-        self.inner.local_addr()
-    }
-
-    pub fn try_clone(&self) -> io::Result<TcpListener> {
-        self.inner.try_clone().map(|s| {
-            TcpListener {
-                inner: s,
-            }
-        })
-    }
-
-    pub fn accept(&self) -> io::Result<(net::TcpStream, SocketAddr)> {
-        self.inner.accept()
-    }
-
-    #[allow(deprecated)]
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.inner.set_only_v6(only_v6)
-    }
-
-    #[allow(deprecated)]
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.inner.only_v6()
-    }
-
-    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
-        self.inner.set_ttl(ttl)
-    }
-
-    pub fn ttl(&self) -> io::Result<u32> {
-        self.inner.ttl()
-    }
-
-    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        self.inner.take_error()
-    }
-}
-
-impl Evented for TcpListener {
-    fn register(&self, poll: &Poll, token: Token,
-                interest: Ready, opts: PollOpt) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token,
-                  interest: Ready, opts: PollOpt) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).deregister(poll)
-    }
-}
-
-impl fmt::Debug for TcpListener {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Debug::fmt(&self.inner, f)
-    }
-}
-
-impl FromRawFd for TcpListener {
-    unsafe fn from_raw_fd(fd: RawFd) -> TcpListener {
-        TcpListener {
-            inner: net::TcpListener::from_raw_fd(fd),
-        }
-    }
-}
-
-impl IntoRawFd for TcpListener {
-    fn into_raw_fd(self) -> RawFd {
-        self.inner.into_raw_fd()
-    }
-}
-
-impl AsRawFd for TcpListener {
-    fn as_raw_fd(&self) -> RawFd {
-        self.inner.as_raw_fd()
-    }
-}
-

src/sys/unix/tcp_listener.rs

@@ -0,0 +1,113 @@
+use crate::sys::unix::net::{new_socket, socket_addr};
+use crate::sys::unix::{SourceFd, TcpStream};
+use crate::{event, Interests, Registry, Token};
+
+use std::fmt;
+use std::io;
+use std::mem::size_of;
+use std::net::{self, SocketAddr};
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+
+pub struct TcpListener {
+    inner: net::TcpListener,
+}
+
+impl TcpListener {
+    pub fn bind(addr: SocketAddr) -> io::Result<TcpListener> {
+        new_socket(addr, libc::SOCK_STREAM).and_then(|socket| {
+            // Set SO_REUSEADDR (mirrors what libstd does).
+            syscall!(setsockopt(
+                socket,
+                libc::SOL_SOCKET,
+                libc::SO_REUSEADDR,
+                &1 as *const libc::c_int as *const libc::c_void,
+                size_of::<libc::c_int>() as libc::socklen_t,
+            ))
+            .and_then(|_| {
+                let (raw_addr, raw_addr_length) = socket_addr(&addr);
+                syscall!(bind(socket, raw_addr, raw_addr_length))
+            })
+            .and_then(|_| syscall!(listen(socket, 1024)))
+            .map_err(|err| {
+                // Close the socket if we hit an error, ignoring the error
+                // from closing since we can't pass back two errors.
+                let _ = unsafe { libc::close(socket) };
+                err
+            })
+            .map(|_| TcpListener {
+                inner: unsafe { net::TcpListener::from_raw_fd(socket) },
+            })
+        })
+    }
+
+    pub fn local_addr(&self) -> io::Result<SocketAddr> {
+        self.inner.local_addr()
+    }
+
+    pub fn try_clone(&self) -> io::Result<TcpListener> {
+        self.inner.try_clone().map(|s| TcpListener { inner: s })
+    }
+
+    pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
+        self.inner
+            .accept()
+            .map(|(inner, addr)| (TcpStream::new(inner), addr))
+    }
+
+    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
+        self.inner.set_ttl(ttl)
+    }
+
+    pub fn ttl(&self) -> io::Result<u32> {
+        self.inner.ttl()
+    }
+
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.inner.take_error()
+    }
+}
+
+impl event::Source for TcpListener {
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()> {
+        SourceFd(&self.as_raw_fd()).register(registry, token, interests)
+    }
+
+    fn reregister(
+        &self,
+        registry: &Registry,
+        token: Token,
+        interests: Interests,
+    ) -> io::Result<()> {
+        SourceFd(&self.as_raw_fd()).reregister(registry, token, interests)
+    }
+
+    fn deregister(&self, registry: &Registry) -> io::Result<()> {
+        SourceFd(&self.as_raw_fd()).deregister(registry)
+    }
+}
+
+impl fmt::Debug for TcpListener {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Debug::fmt(&self.inner, f)
+    }
+}
+
+impl FromRawFd for TcpListener {
+    unsafe fn from_raw_fd(fd: RawFd) -> TcpListener {
+        TcpListener {
+            inner: net::TcpListener::from_raw_fd(fd),
+        }
+    }
+}
+
+impl IntoRawFd for TcpListener {
+    fn into_raw_fd(self) -> RawFd {
+        self.inner.into_raw_fd()
+    }
+}
+
+impl AsRawFd for TcpListener {
+    fn as_raw_fd(&self) -> RawFd {
+        self.inner.as_raw_fd()
+    }
+}

src/sys/unix/tcp_stream.rs

@@ -0,0 +1,150 @@
+use crate::sys::unix::net::{new_socket, socket_addr};
+use crate::sys::unix::SourceFd;
+use crate::{event, Interests, Registry, Token};
+
+use std::fmt;
+use std::io::{self, IoSlice, IoSliceMut, Read, Write};
+use std::net::{self, SocketAddr};
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+
+pub struct TcpStream {
+    inner: net::TcpStream,
+}
+
+impl TcpStream {
+    pub(crate) fn new(inner: net::TcpStream) -> TcpStream {
+        TcpStream { inner }
+    }
+
+    pub fn connect(addr: SocketAddr) -> io::Result<TcpStream> {
+        new_socket(addr, libc::SOCK_STREAM)
+            .and_then(|socket| {
+                let (raw_addr, raw_addr_length) = socket_addr(&addr);
+                syscall!(connect(socket, raw_addr, raw_addr_length))
+                    .or_else(|err| match err {
+                        // Connect hasn't finished, but that is fine.
+                        ref err if err.raw_os_error() == Some(libc::EINPROGRESS) => Ok(0),
+                        err => Err(err),
+                    })
+                    .map(|_| socket)
+                    .map_err(|err| {
+                        // Close the socket if we hit an error, ignoring the error
+                        // from closing since we can't pass back two errors.
+                        let _ = unsafe { libc::close(socket) };
+                        err
+                    })
+            })
+            .map(|socket| TcpStream {
+                inner: unsafe { net::TcpStream::from_raw_fd(socket) },
+            })
+    }
+
+    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+        self.inner.peer_addr()
+    }
+
+    pub fn local_addr(&self) -> io::Result<SocketAddr> {
+        self.inner.local_addr()
+    }
+
+    pub fn try_clone(&self) -> io::Result<TcpStream> {
+        self.inner.try_clone().map(|s| TcpStream { inner: s })
+    }
+
+    pub fn shutdown(&self, how: net::Shutdown) -> io::Result<()> {
+        self.inner.shutdown(how)
+    }
+
+    pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
+        self.inner.set_nodelay(nodelay)
+    }
+
+    pub fn nodelay(&self) -> io::Result<bool> {
+        self.inner.nodelay()
+    }
+
+    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
+        self.inner.set_ttl(ttl)
+    }
+
+    pub fn ttl(&self) -> io::Result<u32> {
+        self.inner.ttl()
+    }
+
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.inner.take_error()
+    }
+
+    pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
+        self.inner.peek(buf)
+    }
+}
+
+impl<'a> Read for &'a TcpStream {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        (&self.inner).read(buf)
+    }
+
+    fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+        (&self.inner).read_vectored(bufs)
+    }
+}
+
+impl<'a> Write for &'a TcpStream {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        (&self.inner).write(buf)
+    }
+
+    fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+        (&self.inner).write_vectored(bufs)
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        (&self.inner).flush()
+    }
+}
+
+impl event::Source for TcpStream {
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()> {
+        SourceFd(&self.as_raw_fd()).register(registry, token, interests)
+    }
+
+    fn reregister(
+        &self,
+        registry: &Registry,
+        token: Token,
+        interests: Interests,
+    ) -> io::Result<()> {
+        SourceFd(&self.as_raw_fd()).reregister(registry, token, interests)
+    }
+
+    fn deregister(&self, registry: &Registry) -> io::Result<()> {
+        SourceFd(&self.as_raw_fd()).deregister(registry)
+    }
+}
+
+impl fmt::Debug for TcpStream {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Debug::fmt(&self.inner, f)
+    }
+}
+
+impl FromRawFd for TcpStream {
+    unsafe fn from_raw_fd(fd: RawFd) -> TcpStream {
+        TcpStream {
+            inner: net::TcpStream::from_raw_fd(fd),
+        }
+    }
+}
+
+impl IntoRawFd for TcpStream {
+    fn into_raw_fd(self) -> RawFd {
+        self.inner.into_raw_fd()
+    }
+}
+
+impl AsRawFd for TcpStream {
+    fn as_raw_fd(&self) -> RawFd {
+        self.inner.as_raw_fd()
+    }
+}

src/sys/unix/udp.rs

@@ -1,24 +1,46 @@
-use {io, Ready, Poll, PollOpt, Token};
-use event::Evented;
-use unix::EventedFd;
-use sys::unix::uio::VecIo;
-use std::fmt;
-use std::net::{self, Ipv4Addr, Ipv6Addr, SocketAddr};
-use std::os::unix::io::{RawFd, IntoRawFd, AsRawFd, FromRawFd};
+use crate::sys::unix::net::{new_socket, socket_addr};
+use crate::unix::SourceFd;
+use crate::{event, Interests, Registry, Token};
 
-#[allow(unused_imports)] // only here for Rust 1.8
-use net2::UdpSocketExt;
-use iovec::IoVec;
+use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr};
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+use std::{fmt, io, net};
 
 pub struct UdpSocket {
     io: net::UdpSocket,
 }
 
 impl UdpSocket {
-    pub fn new(socket: net::UdpSocket) -> io::Result<UdpSocket> {
-        socket.set_nonblocking(true)?;
-        Ok(UdpSocket {
-            io: socket,
+    pub fn bind(addr: SocketAddr) -> io::Result<UdpSocket> {
+        // Gives a warning for non Apple platforms.
+        #[allow(clippy::let_and_return)]
+        let socket = new_socket(addr, libc::SOCK_DGRAM);
+
+        // Set SO_NOSIGPIPE on iOS and macOS (mirrors what libstd does).
+        #[cfg(any(target_os = "ios", target_os = "macos"))]
+        let socket = socket.and_then(|socket| {
+            syscall!(setsockopt(
+                socket,
+                libc::SOL_SOCKET,
+                libc::SO_NOSIGPIPE,
+                &1 as *const libc::c_int as *const libc::c_void,
+                std::mem::size_of::<libc::c_int>() as libc::socklen_t,
+            ))
+            .map(|_| socket)
+        });
+
+        socket.and_then(|socket| {
+            let (raw_addr, raw_addr_length) = socket_addr(&addr);
+            syscall!(bind(socket, raw_addr, raw_addr_length))
+                .map_err(|err| {
+                    // Close the socket if we hit an error, ignoring the error
+                    // from closing since we can't pass back two errors.
+                    let _ = unsafe { libc::close(socket) };
+                    err
+                })
+                .map(|_| UdpSocket {
+                    io: unsafe { net::UdpSocket::from_raw_fd(socket) },
+                })
         })
     }
 
@@ -27,14 +49,10 @@ impl UdpSocket {
     }
 
     pub fn try_clone(&self) -> io::Result<UdpSocket> {
-        self.io.try_clone().map(|io| {
-            UdpSocket {
-                io,
-            }
-        })
+        self.io.try_clone().map(|io| UdpSocket { io })
     }
 
-    pub fn send_to(&self, buf: &[u8], target: &SocketAddr) -> io::Result<usize> {
+    pub fn send_to(&self, buf: &[u8], target: SocketAddr) -> io::Result<usize> {
         self.io.send_to(buf, target)
     }
 
@@ -42,6 +60,10 @@ impl UdpSocket {
         self.io.recv_from(buf)
     }
 
+    pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+        self.io.peek_from(buf)
+    }
+
     pub fn send(&self, buf: &[u8]) -> io::Result<usize> {
         self.io.send(buf)
     }
@@ -50,8 +72,11 @@ impl UdpSocket {
         self.io.recv(buf)
     }
 
-    pub fn connect(&self, addr: SocketAddr)
-                     -> io::Result<()> {
+    pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
+        self.io.peek(buf)
+    }
+
+    pub fn connect(&self, addr: SocketAddr) -> io::Result<()> {
         self.io.connect(addr)
     }
 
@@ -95,67 +120,48 @@ impl UdpSocket {
         self.io.set_ttl(ttl)
     }
 
-    pub fn join_multicast_v4(&self,
-                             multiaddr: &Ipv4Addr,
-                             interface: &Ipv4Addr) -> io::Result<()> {
-        self.io.join_multicast_v4(multiaddr, interface)
+    pub fn join_multicast_v4(&self, multiaddr: Ipv4Addr, interface: Ipv4Addr) -> io::Result<()> {
+        self.io.join_multicast_v4(&multiaddr, &interface)
     }
 
-    pub fn join_multicast_v6(&self,
-                             multiaddr: &Ipv6Addr,
-                             interface: u32) -> io::Result<()> {
+    pub fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
         self.io.join_multicast_v6(multiaddr, interface)
     }
 
-    pub fn leave_multicast_v4(&self,
-                              multiaddr: &Ipv4Addr,
-                              interface: &Ipv4Addr) -> io::Result<()> {
-        self.io.leave_multicast_v4(multiaddr, interface)
+    pub fn leave_multicast_v4(&self, multiaddr: Ipv4Addr, interface: Ipv4Addr) -> io::Result<()> {
+        self.io.leave_multicast_v4(&multiaddr, &interface)
     }
 
-    pub fn leave_multicast_v6(&self,
-                              multiaddr: &Ipv6Addr,
-                              interface: u32) -> io::Result<()> {
+    pub fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
         self.io.leave_multicast_v6(multiaddr, interface)
     }
 
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.io.set_only_v6(only_v6)
-    }
-
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.io.only_v6()
-    }
-
     pub fn take_error(&self) -> io::Result<Option<io::Error>> {
         self.io.take_error()
     }
-
-    pub fn readv(&self, bufs: &mut [&mut IoVec]) -> io::Result<usize> {
-        self.io.readv(bufs)
-    }
-
-    pub fn writev(&self, bufs: &[&IoVec]) -> io::Result<usize> {
-        self.io.writev(bufs)
-    }
 }
 
-impl Evented for UdpSocket {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).register(poll, token, interest, opts)
+impl event::Source for UdpSocket {
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()> {
+        SourceFd(&self.as_raw_fd()).register(registry, token, interests)
     }
 
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).reregister(poll, token, interest, opts)
+    fn reregister(
+        &self,
+        registry: &Registry,
+        token: Token,
+        interests: Interests,
+    ) -> io::Result<()> {
+        SourceFd(&self.as_raw_fd()).reregister(registry, token, interests)
     }
 
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        EventedFd(&self.as_raw_fd()).deregister(poll)
+    fn deregister(&self, registry: &Registry) -> io::Result<()> {
+        SourceFd(&self.as_raw_fd()).deregister(registry)
     }
 }
 
 impl fmt::Debug for UdpSocket {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Debug::fmt(&self.io, f)
     }
 }
@@ -163,7 +169,7 @@ impl fmt::Debug for UdpSocket {
 impl FromRawFd for UdpSocket {
     unsafe fn from_raw_fd(fd: RawFd) -> UdpSocket {
         UdpSocket {
-            io: net::UdpSocket::from_raw_fd(fd),
+            io: std::net::UdpSocket::from_raw_fd(fd),
         }
     }
 }

src/sys/unix/uds.rs

@@ -1,262 +0,0 @@
-use std::io::{Read, Write};
-use std::mem;
-use std::net::Shutdown;
-use std::os::unix::prelude::*;
-use std::path::Path;
-use std::ptr;
-
-use libc;
-
-use {io, Ready, Poll, PollOpt, Token};
-use event::Evented;
-use sys::unix::{cvt, Io};
-use sys::unix::io::{set_nonblock, set_cloexec};
-
-trait MyInto<T> {
-    fn my_into(self) -> T;
-}
-
-impl MyInto<u32> for usize {
-    fn my_into(self) -> u32 { self as u32 }
-}
-
-impl MyInto<usize> for usize {
-    fn my_into(self) -> usize { self }
-}
-
-unsafe fn sockaddr_un(path: &Path)
-                      -> io::Result<(libc::sockaddr_un, libc::socklen_t)> {
-    let mut addr: libc::sockaddr_un = mem::zeroed();
-    addr.sun_family = libc::AF_UNIX as libc::sa_family_t;
-
-    let bytes = path.as_os_str().as_bytes();
-
-    if bytes.len() >= addr.sun_path.len() {
-        return Err(io::Error::new(io::ErrorKind::InvalidInput,
-                                  "path must be shorter than SUN_LEN"))
-    }
-    for (dst, src) in addr.sun_path.iter_mut().zip(bytes.iter()) {
-        *dst = *src as libc::c_char;
-    }
-    // null byte for pathname addresses is already there because we zeroed the
-    // struct
-
-    let mut len = sun_path_offset() + bytes.len();
-    match bytes.get(0) {
-        Some(&0) | None => {}
-        Some(_) => len += 1,
-    }
-    Ok((addr, len as libc::socklen_t))
-}
-
-fn sun_path_offset() -> usize {
-    unsafe {
-        // Work with an actual instance of the type since using a null pointer is UB
-        let addr: libc::sockaddr_un = mem::uninitialized();
-        let base = &addr as *const _ as usize;
-        let path = &addr.sun_path as *const _ as usize;
-        path - base
-    }
-}
-
-#[derive(Debug)]
-pub struct UnixSocket {
-    io: Io,
-}
-
-impl UnixSocket {
-    /// Returns a new, unbound, non-blocking Unix domain socket
-    pub fn stream() -> io::Result<UnixSocket> {
-        #[cfg(target_os = "linux")]
-        use libc::{SOCK_CLOEXEC, SOCK_NONBLOCK};
-        #[cfg(not(target_os = "linux"))]
-        const SOCK_CLOEXEC: libc::c_int = 0;
-        #[cfg(not(target_os = "linux"))]
-        const SOCK_NONBLOCK: libc::c_int = 0;
-
-        unsafe {
-            if cfg!(target_os = "linux") {
-                let flags = libc::SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK;
-                match cvt(libc::socket(libc::AF_UNIX, flags, 0)) {
-                    Ok(fd) => return Ok(UnixSocket::from_raw_fd(fd)),
-                    Err(ref e) if e.raw_os_error() == Some(libc::EINVAL) => {}
-                    Err(e) => return Err(e),
-                }
-            }
-
-            let fd = cvt(libc::socket(libc::AF_UNIX, libc::SOCK_STREAM, 0))?;
-            let fd = UnixSocket::from_raw_fd(fd);
-            set_cloexec(fd.as_raw_fd())?;
-            set_nonblock(fd.as_raw_fd())?;
-            Ok(fd)
-        }
-    }
-
-    /// Connect the socket to the specified address
-    pub fn connect<P: AsRef<Path> + ?Sized>(&self, addr: &P) -> io::Result<()> {
-        unsafe {
-            let (addr, len) = sockaddr_un(addr.as_ref())?;
-            cvt(libc::connect(self.as_raw_fd(),
-                                   &addr as *const _ as *const _,
-                                   len))?;
-            Ok(())
-        }
-    }
-
-    /// Listen for incoming requests
-    pub fn listen(&self, backlog: usize) -> io::Result<()> {
-        unsafe {
-            cvt(libc::listen(self.as_raw_fd(), backlog as i32))?;
-            Ok(())
-        }
-    }
-
-    pub fn accept(&self) -> io::Result<UnixSocket> {
-        unsafe {
-            let fd = cvt(libc::accept(self.as_raw_fd(),
-                                           ptr::null_mut(),
-                                           ptr::null_mut()))?;
-            let fd = Io::from_raw_fd(fd);
-            set_cloexec(fd.as_raw_fd())?;
-            set_nonblock(fd.as_raw_fd())?;
-            Ok(UnixSocket { io: fd })
-        }
-    }
-
-    /// Bind the socket to the specified address
-    pub fn bind<P: AsRef<Path> + ?Sized>(&self, addr: &P) -> io::Result<()> {
-        unsafe {
-            let (addr, len) = sockaddr_un(addr.as_ref())?;
-            cvt(libc::bind(self.as_raw_fd(),
-                                &addr as *const _ as *const _,
-                                len))?;
-            Ok(())
-        }
-    }
-
-    pub fn try_clone(&self) -> io::Result<UnixSocket> {
-        Ok(UnixSocket { io: self.io.try_clone()? })
-    }
-
-    pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
-        let how = match how {
-            Shutdown::Read => libc::SHUT_RD,
-            Shutdown::Write => libc::SHUT_WR,
-            Shutdown::Both => libc::SHUT_RDWR,
-        };
-        unsafe {
-            cvt(libc::shutdown(self.as_raw_fd(), how))?;
-            Ok(())
-        }
-    }
-
-    pub fn read_recv_fd(&mut self, buf: &mut [u8]) -> io::Result<(usize, Option<RawFd>)> {
-        unsafe {
-            let mut iov = libc::iovec {
-                iov_base: buf.as_mut_ptr() as *mut _,
-                iov_len: buf.len(),
-            };
-            struct Cmsg {
-                hdr: libc::cmsghdr,
-                data: [libc::c_int; 1],
-            }
-            let mut cmsg: Cmsg = mem::zeroed();
-            let mut msg: libc::msghdr = mem::zeroed();
-            msg.msg_iov = &mut iov;
-            msg.msg_iovlen = 1;
-            msg.msg_control = &mut cmsg as *mut _ as *mut _;
-            msg.msg_controllen = mem::size_of_val(&cmsg).my_into();
-            let bytes = cvt(libc::recvmsg(self.as_raw_fd(), &mut msg, 0))?;
-
-            const SCM_RIGHTS: libc::c_int = 1;
-
-            let fd = if cmsg.hdr.cmsg_level == libc::SOL_SOCKET &&
-                        cmsg.hdr.cmsg_type == SCM_RIGHTS {
-                Some(cmsg.data[0])
-            } else {
-                None
-            };
-            Ok((bytes as usize, fd))
-        }
-    }
-
-    pub fn write_send_fd(&mut self, buf: &[u8], fd: RawFd) -> io::Result<usize> {
-        unsafe {
-            let mut iov = libc::iovec {
-                iov_base: buf.as_ptr() as *mut _,
-                iov_len: buf.len(),
-            };
-            struct Cmsg {
-                hdr: libc::cmsghdr,
-                data: [libc::c_int; 1],
-            }
-            let mut cmsg: Cmsg = mem::zeroed();
-            cmsg.hdr.cmsg_len = mem::size_of_val(&cmsg).my_into();
-            cmsg.hdr.cmsg_level = libc::SOL_SOCKET;
-            cmsg.hdr.cmsg_type = 1; // SCM_RIGHTS
-            cmsg.data[0] = fd;
-            let mut msg: libc::msghdr = mem::zeroed();
-            msg.msg_iov = &mut iov;
-            msg.msg_iovlen = 1;
-            msg.msg_control = &mut cmsg as *mut _ as *mut _;
-            msg.msg_controllen = mem::size_of_val(&cmsg).my_into();
-            let bytes = cvt(libc::sendmsg(self.as_raw_fd(), &msg, 0))?;
-            Ok(bytes as usize)
-        }
-    }
-}
-
-impl Read for UnixSocket {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        self.io.read(buf)
-    }
-}
-
-impl Write for UnixSocket {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        self.io.write(buf)
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        self.io.flush()
-    }
-}
-
-impl Evented for UnixSocket {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.io.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.io.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.io.deregister(poll)
-    }
-}
-
-
-impl From<Io> for UnixSocket {
-    fn from(io: Io) -> UnixSocket {
-        UnixSocket { io }
-    }
-}
-
-impl FromRawFd for UnixSocket {
-    unsafe fn from_raw_fd(fd: RawFd) -> UnixSocket {
-        UnixSocket { io: Io::from_raw_fd(fd) }
-    }
-}
-
-impl IntoRawFd for UnixSocket {
-    fn into_raw_fd(self) -> RawFd {
-        self.io.into_raw_fd()
-    }
-}
-
-impl AsRawFd for UnixSocket {
-    fn as_raw_fd(&self) -> RawFd {
-        self.io.as_raw_fd()
-    }
-}

src/sys/unix/uio.rs

@@ -1,44 +0,0 @@
-use std::cmp;
-use std::io;
-use std::os::unix::io::AsRawFd;
-use libc;
-use iovec::IoVec;
-use iovec::unix as iovec;
-
-pub trait VecIo {
-    fn readv(&self, bufs: &mut [&mut IoVec]) -> io::Result<usize>;
-
-    fn writev(&self, bufs: &[&IoVec]) -> io::Result<usize>;
-}
-
-impl<T: AsRawFd> VecIo for T {
-    fn readv(&self, bufs: &mut [&mut IoVec]) -> io::Result<usize> {
-        unsafe {
-            let slice = iovec::as_os_slice_mut(bufs);
-            let len = cmp::min(<libc::c_int>::max_value() as usize, slice.len());
-            let rc = libc::readv(self.as_raw_fd(),
-                                 slice.as_ptr(),
-                                 len as libc::c_int);
-            if rc < 0 {
-                Err(io::Error::last_os_error())
-            } else {
-                Ok(rc as usize)
-            }
-        }
-    }
-
-    fn writev(&self, bufs: &[&IoVec]) -> io::Result<usize> {
-        unsafe {
-            let slice = iovec::as_os_slice(bufs);
-            let len = cmp::min(<libc::c_int>::max_value() as usize, slice.len());
-            let rc = libc::writev(self.as_raw_fd(),
-                                  slice.as_ptr(),
-                                  len as libc::c_int);
-            if rc < 0 {
-                Err(io::Error::last_os_error())
-            } else {
-                Ok(rc as usize)
-            }
-        }
-    }
-}

src/sys/unix/waker.rs

@@ -0,0 +1,174 @@
+#[cfg(any(target_os = "linux", target_os = "android"))]
+mod eventfd {
+    use crate::sys::Selector;
+    use crate::{Interests, Token};
+
+    use std::fs::File;
+    use std::io::{self, Read, Write};
+    use std::os::unix::io::FromRawFd;
+
+    /// Waker backed by `eventfd`.
+    ///
+    /// `eventfd` is effectively an 64 bit counter. All writes must be of 8
+    /// bytes (64 bits) and are converted (native endian) into an 64 bit
+    /// unsigned integer and added to the count. Reads must also be 8 bytes and
+    /// reset the count to 0, returning the count.
+    #[derive(Debug)]
+    pub struct Waker {
+        fd: File,
+    }
+
+    impl Waker {
+        pub fn new(selector: &Selector, token: Token) -> io::Result<Waker> {
+            syscall!(eventfd(0, libc::EFD_CLOEXEC | libc::EFD_NONBLOCK)).and_then(|fd| {
+                // Turn the file descriptor into a file first so we're ensured
+                // it's closed when dropped, e.g. when register below fails.
+                let file = unsafe { File::from_raw_fd(fd) };
+                selector
+                    .register(fd, token, Interests::READABLE)
+                    .map(|()| Waker { fd: file })
+            })
+        }
+
+        pub fn wake(&self) -> io::Result<()> {
+            let buf: [u8; 8] = 1u64.to_ne_bytes();
+            match (&self.fd).write(&buf) {
+                Ok(_) => Ok(()),
+                Err(ref err) if err.kind() == io::ErrorKind::WouldBlock => {
+                    // Writing only blocks if the counter is going to overflow.
+                    // So we'll reset the counter to 0 and wake it again.
+                    self.reset()?;
+                    self.wake()
+                }
+                Err(err) => Err(err),
+            }
+        }
+
+        /// Reset the eventfd object, only need to call this if `wake` fails.
+        fn reset(&self) -> io::Result<()> {
+            let mut buf: [u8; 8] = 0u64.to_ne_bytes();
+            match (&self.fd).read(&mut buf) {
+                Ok(_) => Ok(()),
+                // If the `Waker` hasn't been awoken yet this will return a
+                // `WouldBlock` error which we can safely ignore.
+                Err(ref err) if err.kind() == io::ErrorKind::WouldBlock => Ok(()),
+                Err(err) => Err(err),
+            }
+        }
+    }
+}
+
+#[cfg(any(target_os = "linux", target_os = "android"))]
+pub use self::eventfd::Waker;
+
+#[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))]
+mod kqueue {
+    use crate::sys::Selector;
+    use crate::Token;
+
+    use std::io;
+
+    /// Waker backed by kqueue user space notifications (`EVFILT_USER`).
+    ///
+    /// The implementation is fairly simple, first the kqueue must be setup to
+    /// receive waker events this done by calling `Selector.setup_waker`. Next
+    /// we need access to kqueue, thus we need to duplicate the file descriptor.
+    /// Now waking is as simple as adding an event to the kqueue.
+    #[derive(Debug)]
+    pub struct Waker {
+        selector: Selector,
+        token: Token,
+    }
+
+    impl Waker {
+        pub fn new(selector: &Selector, token: Token) -> io::Result<Waker> {
+            selector.try_clone().and_then(|selector| {
+                selector
+                    .setup_waker(token)
+                    .map(|()| Waker { selector, token })
+            })
+        }
+
+        pub fn wake(&self) -> io::Result<()> {
+            self.selector.wake(self.token)
+        }
+    }
+}
+
+#[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))]
+pub use self::kqueue::Waker;
+
+#[cfg(any(
+    target_os = "bitrig",
+    target_os = "dragonfly",
+    target_os = "netbsd",
+    target_os = "openbsd",
+    target_os = "solaris"
+))]
+mod pipe {
+    use crate::sys::unix::Selector;
+    use crate::{Interests, Token};
+
+    use std::fs::File;
+    use std::io::{self, Read, Write};
+    use std::os::unix::io::FromRawFd;
+
+    /// Waker backed by a unix pipe.
+    ///
+    /// Waker controls both the sending and receiving ends and empties the pipe
+    /// if writing to it (waking) fails.
+    #[derive(Debug)]
+    pub struct Waker {
+        sender: File,
+        receiver: File,
+    }
+
+    impl Waker {
+        pub fn new(selector: &Selector, token: Token) -> io::Result<Waker> {
+            let mut fds = [-1; 2];
+            syscall!(pipe2(fds.as_mut_ptr(), libc::O_NONBLOCK | libc::O_CLOEXEC))?;
+            // Turn the file descriptors into files first so we're ensured
+            // they're closed when dropped, e.g. when register below fails.
+            let sender = unsafe { File::from_raw_fd(fds[1]) };
+            let receiver = unsafe { File::from_raw_fd(fds[0]) };
+            selector
+                .register(fds[0], token, Interests::READABLE)
+                .map(|()| Waker { sender, receiver })
+        }
+
+        pub fn wake(&self) -> io::Result<()> {
+            match (&self.sender).write(&[1]) {
+                Ok(_) => Ok(()),
+                Err(ref err) if err.kind() == io::ErrorKind::WouldBlock => {
+                    // The reading end is full so we'll empty the buffer and try
+                    // again.
+                    self.empty();
+                    self.wake()
+                }
+                Err(ref err) if err.kind() == io::ErrorKind::Interrupted => self.wake(),
+                Err(err) => Err(err),
+            }
+        }
+
+        /// Empty the pipe's buffer, only need to call this if `wake` fails.
+        /// This ignores any errors.
+        fn empty(&self) {
+            let mut buf = [0; 4096];
+            loop {
+                match (&self.receiver).read(&mut buf) {
+                    Ok(n) if n > 0 => continue,
+                    _ => return,
+                }
+            }
+        }
+    }
+}
+
+#[cfg(any(
+    target_os = "bitrig",
+    target_os = "dragonfly",
+    target_os = "netbsd",
+    target_os = "openbsd",
+    target_os = "solaris"
+))]
+pub use self::pipe::Waker;

src/sys/windows/afd.rs

@@ -0,0 +1,222 @@
+use lazy_static::lazy_static;
+use miow::iocp::CompletionPort;
+use ntapi::ntioapi::FILE_OPEN;
+use ntapi::ntioapi::{IO_STATUS_BLOCK_u, IO_STATUS_BLOCK};
+use ntapi::ntioapi::{NtCancelIoFileEx, NtCreateFile, NtDeviceIoControlFile};
+use ntapi::ntrtl::RtlNtStatusToDosError;
+use std::ffi::OsStr;
+use std::fmt;
+use std::fs::File;
+use std::io;
+use std::mem::{size_of, zeroed};
+use std::os::windows::ffi::OsStrExt;
+use std::os::windows::io::{AsRawHandle, FromRawHandle, RawHandle};
+use std::ptr::null_mut;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use winapi::shared::ntdef::{
+    HANDLE, LARGE_INTEGER, NTSTATUS, OBJECT_ATTRIBUTES, PVOID, ULONG, UNICODE_STRING,
+};
+use winapi::shared::ntstatus::{STATUS_NOT_FOUND, STATUS_PENDING, STATUS_SUCCESS};
+use winapi::um::handleapi::INVALID_HANDLE_VALUE;
+use winapi::um::winbase::{SetFileCompletionNotificationModes, FILE_SKIP_SET_EVENT_ON_HANDLE};
+use winapi::um::winnt::SYNCHRONIZE;
+use winapi::um::winnt::{FILE_SHARE_READ, FILE_SHARE_WRITE};
+
+const IOCTL_AFD_POLL: ULONG = 0x00012024;
+
+static NEXT_TOKEN: AtomicUsize = AtomicUsize::new(0);
+
+lazy_static! {
+    static ref AFD_HELPER_NAME: Vec<u16> = {
+        OsStr::new("\\Device\\Afd\\Mio")
+            .encode_wide()
+            .collect::<Vec<_>>()
+    };
+}
+
+struct UnicodeString(UNICODE_STRING);
+unsafe impl Send for UnicodeString {}
+unsafe impl Sync for UnicodeString {}
+
+struct ObjectAttributes(OBJECT_ATTRIBUTES);
+unsafe impl Send for ObjectAttributes {}
+unsafe impl Sync for ObjectAttributes {}
+
+lazy_static! {
+    static ref AFD_OBJ_NAME: UnicodeString = UnicodeString(UNICODE_STRING {
+        // Lengths are calced in bytes
+        Length: (AFD_HELPER_NAME.len() * 2) as u16,
+        MaximumLength: (AFD_HELPER_NAME.len() * 2) as u16,
+        Buffer: AFD_HELPER_NAME.as_ptr() as *mut _,
+    });
+    static ref AFD_HELPER_ATTRIBUTES: ObjectAttributes = ObjectAttributes(OBJECT_ATTRIBUTES {
+        Length: size_of::<OBJECT_ATTRIBUTES>() as ULONG,
+        RootDirectory: null_mut() as HANDLE,
+        ObjectName: &AFD_OBJ_NAME.0 as *const _ as *mut _,
+        Attributes: 0 as ULONG,
+        SecurityDescriptor: null_mut() as PVOID,
+        SecurityQualityOfService: null_mut() as PVOID,
+    });
+}
+
+/// Winsock2 AFD driver instance.
+///
+/// All operations are unsafe due to IO_STATUS_BLOCK parameter are being used by Afd driver during STATUS_PENDING before I/O Completion Port returns its result.
+#[derive(Debug)]
+pub struct Afd {
+    fd: File,
+}
+
+#[repr(C)]
+#[derive(Debug)]
+pub struct AfdPollHandleInfo {
+    pub handle: HANDLE,
+    pub events: ULONG,
+    pub status: NTSTATUS,
+}
+
+unsafe impl Send for AfdPollHandleInfo {}
+
+#[repr(C)]
+pub struct AfdPollInfo {
+    pub timeout: LARGE_INTEGER,
+    // Can have only value 1.
+    pub number_of_handles: ULONG,
+    pub exclusive: ULONG,
+    pub handles: [AfdPollHandleInfo; 1],
+}
+
+impl AfdPollInfo {
+    pub fn zeroed() -> AfdPollInfo {
+        unsafe { zeroed() }
+    }
+}
+
+impl fmt::Debug for AfdPollInfo {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("AfdPollInfo").finish()
+    }
+}
+
+impl Afd {
+    /// Create new Afd instance.
+    pub fn new(cp: &CompletionPort) -> io::Result<Afd> {
+        let mut afd_helper_handle: HANDLE = INVALID_HANDLE_VALUE;
+        let mut iosb = IO_STATUS_BLOCK {
+            u: IO_STATUS_BLOCK_u { Status: 0 },
+            Information: 0,
+        };
+
+        unsafe {
+            let status = NtCreateFile(
+                &mut afd_helper_handle as *mut _,
+                SYNCHRONIZE,
+                &AFD_HELPER_ATTRIBUTES.0 as *const _ as *mut _,
+                &mut iosb,
+                null_mut(),
+                0 as ULONG,
+                FILE_SHARE_READ | FILE_SHARE_WRITE,
+                FILE_OPEN,
+                0 as ULONG,
+                null_mut(),
+                0 as ULONG,
+            );
+            if status != STATUS_SUCCESS {
+                return Err(io::Error::from_raw_os_error(
+                    RtlNtStatusToDosError(status) as i32
+                ));
+            }
+            let fd = File::from_raw_handle(afd_helper_handle as RawHandle);
+            let token = NEXT_TOKEN.fetch_add(1, Ordering::Relaxed) + 1;
+            let afd = Afd { fd };
+            cp.add_handle(token, &afd.fd)?;
+            match SetFileCompletionNotificationModes(
+                afd_helper_handle,
+                FILE_SKIP_SET_EVENT_ON_HANDLE,
+            ) {
+                0 => Err(io::Error::last_os_error()),
+                _ => Ok(afd),
+            }
+        }
+    }
+
+    /// Poll `Afd` instance with `AfdPollInfo`.
+    ///
+    /// # Unsafety
+    ///
+    /// This function is unsafe due to memory of `IO_STATUS_BLOCK` still being used by `Afd` instance while `Ok(false)` (`STATUS_PENDING`).
+    /// `iosb` needs to be untouched after the call while operation is in effective at ALL TIME except for `cancel` method.
+    /// So be careful not to `poll` twice while polling.
+    /// User should deallocate there overlapped value when error to prevent memory leak.
+    pub unsafe fn poll(
+        &self,
+        info: &mut AfdPollInfo,
+        iosb: *mut IO_STATUS_BLOCK,
+        overlapped: PVOID,
+    ) -> io::Result<bool> {
+        let info_ptr: PVOID = info as *mut _ as PVOID;
+        (*iosb).u.Status = STATUS_PENDING;
+        let status = NtDeviceIoControlFile(
+            self.fd.as_raw_handle(),
+            null_mut(),
+            None,
+            overlapped,
+            iosb,
+            IOCTL_AFD_POLL,
+            info_ptr,
+            size_of::<AfdPollInfo>() as u32,
+            info_ptr,
+            size_of::<AfdPollInfo>() as u32,
+        );
+        match status {
+            STATUS_SUCCESS => Ok(true),
+            STATUS_PENDING => Ok(false),
+            _ => Err(io::Error::from_raw_os_error(
+                RtlNtStatusToDosError(status) as i32
+            )),
+        }
+    }
+
+    /// Cancel previous polled request of `Afd`.
+    ///
+    /// iosb needs to be used by `poll` first for valid `cancel`.
+    ///
+    /// # Unsafety
+    ///
+    /// This function is unsafe due to memory of `IO_STATUS_BLOCK` still being used by `Afd` instance while `Ok(false)` (`STATUS_PENDING`).
+    /// Use it only with request is still being polled so that you have valid `IO_STATUS_BLOCK` to use.
+    /// User should NOT deallocate there overlapped value after the `cancel` to prevent double free.
+    pub unsafe fn cancel(&self, iosb: *mut IO_STATUS_BLOCK) -> io::Result<()> {
+        if (*iosb).u.Status != STATUS_PENDING {
+            return Ok(());
+        }
+
+        let mut cancel_iosb = IO_STATUS_BLOCK {
+            u: IO_STATUS_BLOCK_u { Status: 0 },
+            Information: 0,
+        };
+        let status = NtCancelIoFileEx(self.fd.as_raw_handle(), iosb, &mut cancel_iosb);
+        if status == STATUS_SUCCESS || status == STATUS_NOT_FOUND {
+            return Ok(());
+        }
+        Err(io::Error::from_raw_os_error(
+            RtlNtStatusToDosError(status) as i32
+        ))
+    }
+}
+
+pub const AFD_POLL_RECEIVE: u32 = 0x0001;
+pub const AFD_POLL_RECEIVE_EXPEDITED: u32 = 0x0002;
+pub const AFD_POLL_SEND: u32 = 0x0004;
+pub const AFD_POLL_DISCONNECT: u32 = 0x0008;
+pub const AFD_POLL_ABORT: u32 = 0x0010;
+pub const AFD_POLL_LOCAL_CLOSE: u32 = 0x0020;
+pub const AFD_POLL_ACCEPT: u32 = 0x0080;
+pub const AFD_POLL_CONNECT_FAIL: u32 = 0x0100;
+pub const KNOWN_AFD_EVENTS: u32 = AFD_POLL_RECEIVE
+    | AFD_POLL_RECEIVE_EXPEDITED
+    | AFD_POLL_SEND
+    | AFD_POLL_DISCONNECT
+    | AFD_POLL_ABORT
+    | AFD_POLL_ACCEPT
+    | AFD_POLL_CONNECT_FAIL;

src/sys/windows/awakener.rs

@@ -1,66 +0,0 @@
-use std::sync::Mutex;
-
-use miow::iocp::CompletionStatus;
-use {io, poll, Ready, Poll, PollOpt, Token};
-use event::Evented;
-use sys::windows::Selector;
-
-pub struct Awakener {
-    inner: Mutex<Option<AwakenerInner>>,
-}
-
-struct AwakenerInner {
-    token: Token,
-    selector: Selector,
-}
-
-impl Awakener {
-    pub fn new() -> io::Result<Awakener> {
-        Ok(Awakener {
-            inner: Mutex::new(None),
-        })
-    }
-
-    pub fn wakeup(&self) -> io::Result<()> {
-        // Each wakeup notification has NULL as its `OVERLAPPED` pointer to
-        // indicate that it's from this awakener and not part of an I/O
-        // operation. This is specially recognized by the selector.
-        //
-        // If we haven't been registered with an event loop yet just silently
-        // succeed.
-        if let Some(inner) = self.inner.lock().unwrap().as_ref() {
-            let status = CompletionStatus::new(0,
-                                               usize::from(inner.token),
-                                               0 as *mut _);
-            inner.selector.port().post(status)?;
-        }
-        Ok(())
-    }
-
-    pub fn cleanup(&self) {
-        // noop
-    }
-}
-
-impl Evented for Awakener {
-    fn register(&self, poll: &Poll, token: Token, events: Ready,
-                opts: PollOpt) -> io::Result<()> {
-        assert_eq!(opts, PollOpt::edge());
-        assert_eq!(events, Ready::readable());
-        *self.inner.lock().unwrap() = Some(AwakenerInner {
-            selector: poll::selector(poll).clone_ref(),
-            token: token,
-        });
-        Ok(())
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, events: Ready,
-                  opts: PollOpt) -> io::Result<()> {
-        self.register(poll, token, events, opts)
-    }
-
-    fn deregister(&self, _poll: &Poll) -> io::Result<()> {
-        *self.inner.lock().unwrap() = None;
-        Ok(())
-    }
-}

src/sys/windows/buffer_pool.rs

@@ -1,20 +0,0 @@
-pub struct BufferPool {
-    pool: Vec<Vec<u8>>,
-}
-
-impl BufferPool {
-    pub fn new(cap: usize) -> BufferPool {
-        BufferPool { pool: Vec::with_capacity(cap) }
-    }
-
-    pub fn get(&mut self, default_cap: usize) -> Vec<u8> {
-        self.pool.pop().unwrap_or_else(|| Vec::with_capacity(default_cap))
-    }
-
-    pub fn put(&mut self, mut buf: Vec<u8>) {
-        if self.pool.len() < self.pool.capacity(){
-            unsafe { buf.set_len(0); }
-            self.pool.push(buf);
-        }
-    }
-}

src/sys/windows/event.rs

@@ -0,0 +1,97 @@
+#[derive(Debug)]
+pub struct Event {
+    pub flags: u32,
+    pub data: u64,
+}
+
+use miow::iocp::CompletionStatus;
+
+use super::afd;
+use crate::Token;
+
+pub fn token(event: &Event) -> Token {
+    Token(event.data as usize)
+}
+
+pub fn is_readable(event: &Event) -> bool {
+    if is_error(event) || is_read_hup(event) {
+        return true;
+    }
+    event.flags & (afd::AFD_POLL_RECEIVE | afd::AFD_POLL_ACCEPT) != 0
+}
+
+pub fn is_writable(event: &Event) -> bool {
+    if is_error(event) {
+        return true;
+    }
+    event.flags & afd::AFD_POLL_SEND != 0
+}
+
+pub fn is_error(event: &Event) -> bool {
+    event.flags & afd::AFD_POLL_CONNECT_FAIL != 0
+}
+
+pub fn is_hup(event: &Event) -> bool {
+    event.flags & afd::AFD_POLL_ABORT != 0
+}
+
+pub fn is_read_hup(event: &Event) -> bool {
+    event.flags & afd::AFD_POLL_DISCONNECT != 0
+}
+
+pub fn is_priority(event: &Event) -> bool {
+    event.flags & afd::AFD_POLL_RECEIVE_EXPEDITED != 0
+}
+
+pub fn is_aio(_: &Event) -> bool {
+    // Not supported.
+    false
+}
+
+pub fn is_lio(_: &Event) -> bool {
+    // Not supported.
+    false
+}
+
+pub struct Events {
+    /// Raw I/O event completions are filled in here by the call to `get_many`
+    /// on the completion port above. These are then processed to run callbacks
+    /// which figure out what to do after the event is done.
+    pub statuses: Box<[CompletionStatus]>,
+
+    /// Literal events returned by `get` to the upwards `EventLoop`. This file
+    /// doesn't really modify this (except for the waker), instead almost all
+    /// events are filled in by the `ReadinessQueue` from the `poll` module.
+    pub events: Vec<Event>,
+}
+
+impl Events {
+    pub fn with_capacity(cap: usize) -> Events {
+        // Note that it's possible for the output `events` to grow beyond the
+        // capacity as it can also include deferred events, but that's certainly
+        // not the end of the world!
+        Events {
+            statuses: vec![CompletionStatus::zero(); cap].into_boxed_slice(),
+            events: Vec::with_capacity(cap),
+        }
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.events.is_empty()
+    }
+
+    pub fn capacity(&self) -> usize {
+        self.events.capacity()
+    }
+
+    pub fn get(&self, idx: usize) -> Option<&Event> {
+        self.events.get(idx)
+    }
+
+    pub fn clear(&mut self) {
+        self.events.truncate(0);
+        for c in 0..self.statuses.len() {
+            self.statuses[c] = CompletionStatus::zero();
+        }
+    }
+}

src/sys/windows/from_raw_arc.rs

@@ -1,116 +0,0 @@
-//! A "Manual Arc" which allows manually frobbing the reference count
-//!
-//! This module contains a copy of the `Arc` found in the standard library,
-//! stripped down to the bare bones of what we actually need. The reason this is
-//! done is for the ability to concretely know the memory layout of the `Inner`
-//! structure of the arc pointer itself (e.g. `ArcInner` in the standard
-//! library).
-//!
-//! We do some unsafe casting from `*mut OVERLAPPED` to a `FromRawArc<T>` to
-//! ensure that data lives for the length of an I/O operation, but this means
-//! that we have to know the layouts of the structures involved. This
-//! representation primarily guarantees that the data, `T` is at the front of
-//! the inner pointer always.
-//!
-//! Note that we're missing out on some various optimizations implemented in the
-//! standard library:
-//!
-//! * The size of `FromRawArc` is actually two words because of the drop flag
-//! * The compiler doesn't understand that the pointer in `FromRawArc` is never
-//!   null, so Option<FromRawArc<T>> is not a nullable pointer.
-
-use std::ops::Deref;
-use std::mem;
-use std::sync::atomic::{self, AtomicUsize, Ordering};
-
-pub struct FromRawArc<T> {
-    _inner: *mut Inner<T>,
-}
-
-unsafe impl<T: Sync + Send> Send for FromRawArc<T> { }
-unsafe impl<T: Sync + Send> Sync for FromRawArc<T> { }
-
-#[repr(C)]
-struct Inner<T> {
-    data: T,
-    cnt: AtomicUsize,
-}
-
-impl<T> FromRawArc<T> {
-    pub fn new(data: T) -> FromRawArc<T> {
-        let x = Box::new(Inner {
-            data: data,
-            cnt: AtomicUsize::new(1),
-        });
-        FromRawArc { _inner: unsafe { mem::transmute(x) } }
-    }
-
-    pub unsafe fn from_raw(ptr: *mut T) -> FromRawArc<T> {
-        // Note that if we could use `mem::transmute` here to get a libstd Arc
-        // (guaranteed) then we could just use std::sync::Arc, but this is the
-        // crucial reason this currently exists.
-        FromRawArc { _inner: ptr as *mut Inner<T> }
-    }
-}
-
-impl<T> Clone for FromRawArc<T> {
-    fn clone(&self) -> FromRawArc<T> {
-        // Atomic ordering of Relaxed lifted from libstd, but the general idea
-        // is that you need synchronization to communicate this increment to
-        // another thread, so this itself doesn't need to be synchronized.
-        unsafe {
-            (*self._inner).cnt.fetch_add(1, Ordering::Relaxed);
-        }
-        FromRawArc { _inner: self._inner }
-    }
-}
-
-impl<T> Deref for FromRawArc<T> {
-    type Target = T;
-
-    fn deref(&self) -> &T {
-        unsafe { &(*self._inner).data }
-    }
-}
-
-impl<T> Drop for FromRawArc<T> {
-    fn drop(&mut self) {
-        unsafe {
-            // Atomic orderings lifted from the standard library
-            if (*self._inner).cnt.fetch_sub(1, Ordering::Release) != 1 {
-                return
-            }
-            atomic::fence(Ordering::Acquire);
-            drop(mem::transmute::<_, Box<T>>(self._inner));
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::FromRawArc;
-
-    #[test]
-    fn smoke() {
-        let a = FromRawArc::new(1);
-        assert_eq!(*a, 1);
-        assert_eq!(*a.clone(), 1);
-    }
-
-    #[test]
-    fn drops() {
-        struct A<'a>(&'a mut bool);
-        impl<'a> Drop for A<'a> {
-            fn drop(&mut self) {
-                *self.0 = true;
-            }
-        }
-        let mut a = false;
-        {
-            let a = FromRawArc::new(A(&mut a));
-            let _ = a.clone();
-            assert!(!*a.0);
-        }
-        assert!(a);
-    }
-}

src/sys/windows/io_status_block.rs

@@ -0,0 +1,32 @@
+use ntapi::ntioapi::{IO_STATUS_BLOCK_u, IO_STATUS_BLOCK};
+use std::cell::UnsafeCell;
+use std::fmt;
+
+pub struct IoStatusBlock(UnsafeCell<IO_STATUS_BLOCK>);
+
+// There is a pointer field in `IO_STATUS_BLOCK_u`, which we don't use that. Thus it is safe to implement Send here.
+unsafe impl Send for IoStatusBlock {}
+
+impl IoStatusBlock {
+    pub fn zeroed() -> IoStatusBlock {
+        let iosb = IO_STATUS_BLOCK {
+            u: IO_STATUS_BLOCK_u { Status: 0 },
+            Information: 0,
+        };
+        IoStatusBlock(UnsafeCell::new(iosb))
+    }
+
+    pub fn as_ptr(&self) -> *const IO_STATUS_BLOCK {
+        self.0.get()
+    }
+
+    pub fn as_mut_ptr(&self) -> *mut IO_STATUS_BLOCK {
+        self.0.get()
+    }
+}
+
+impl fmt::Debug for IoStatusBlock {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("IoStatusBlock").finish()
+    }
+}

src/sys/windows/mod.rs

@@ -1,187 +1,127 @@
-//! Implementation of mio for Windows using IOCP
-//!
-//! This module uses I/O Completion Ports (IOCP) on Windows to implement mio's
-//! Unix epoll-like interface. Unfortunately these two I/O models are
-//! fundamentally incompatible:
-//!
-//! * IOCP is a completion-based model where work is submitted to the kernel and
-//!   a program is notified later when the work finished.
-//! * epoll is a readiness-based model where the kernel is queried as to what
-//!   work can be done, and afterwards the work is done.
-//!
-//! As a result, this implementation for Windows is much less "low level" than
-//! the Unix implementation of mio. This design decision was intentional,
-//! however.
-//!
-//! ## What is IOCP?
-//!
-//! The [official docs][docs] have a comprehensive explanation of what IOCP is,
-//! but at a high level it requires the following operations to be executed to
-//! perform some I/O:
-//!
-//! 1. A completion port is created
-//! 2. An I/O handle and a token is registered with this completion port
-//! 3. Some I/O is issued on the handle. This generally means that an API was
-//!    invoked with a zeroed `OVERLAPPED` structure. The API will immediately
-//!    return.
-//! 4. After some time, the application queries the I/O port for completed
-//!    events. The port will returned a pointer to the `OVERLAPPED` along with
-//!    the token presented at registration time.
-//!
-//! Many I/O operations can be fired off before waiting on a port, and the port
-//! will block execution of the calling thread until an I/O event has completed
-//! (or a timeout has elapsed).
-//!
-//! Currently all of these low-level operations are housed in a separate `miow`
-//! crate to provide a 0-cost abstraction over IOCP. This crate uses that to
-//! implement all fiddly bits so there's very few actual Windows API calls or
-//! `unsafe` blocks as a result.
-//!
-//! [docs]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365198%28v=vs.85%29.aspx
-//!
-//! ## Safety of IOCP
-//!
-//! Unfortunately for us, IOCP is pretty unsafe in terms of Rust lifetimes and
-//! such. When an I/O operation is submitted to the kernel, it involves handing
-//! the kernel a few pointers like a buffer to read/write, an `OVERLAPPED`
-//! structure pointer, and perhaps some other buffers such as for socket
-//! addresses. These pointers all have to remain valid **for the entire I/O
-//! operation's duration**.
-//!
-//! There's no way to define a safe lifetime for these pointers/buffers over
-//! the span of an I/O operation, so we're forced to add a layer of abstraction
-//! (not 0-cost) to make these APIs safe. Currently this implementation
-//! basically just boxes everything up on the heap to give it a stable address
-//! and then keys off that most of the time.
-//!
-//! ## From completion to readiness
-//!
-//! Translating a completion-based model to a readiness-based model is also no
-//! easy task, and a significant portion of this implementation is managing this
-//! translation. The basic idea behind this implementation is to issue I/O
-//! operations preemptively and then translate their completions to a "I'm
-//! ready" event.
-//!
-//! For example, in the case of reading a `TcpSocket`, as soon as a socket is
-//! connected (or registered after an accept) a read operation is executed.
-//! While the read is in progress calls to `read` will return `WouldBlock`, and
-//! once the read is completed we translate the completion notification into a
-//! `readable` event. Once the internal buffer is drained (e.g. all data from it
-//! has been read) a read operation is re-issued.
-//!
-//! Write operations are a little different from reads, and the current
-//! implementation is to just schedule a write as soon as `write` is first
-//! called. While that write operation is in progress all future calls to
-//! `write` will return `WouldBlock`. Completion of the write then translates to
-//! a `writable` event. Note that this will probably want to add some layer of
-//! internal buffering in the future.
-//!
-//! ## Buffer Management
-//!
-//! As there's lots of I/O operations in flight at any one point in time,
-//! there's lots of live buffers that need to be juggled around (e.g. this
-//! implementation's own internal buffers).
-//!
-//! Currently all buffers are created for the I/O operation at hand and are then
-//! discarded when it completes (this is listed as future work below).
-//!
-//! ## Callback Management
-//!
-//! When the main event loop receives a notification that an I/O operation has
-//! completed, some work needs to be done to translate that to a set of events
-//! or perhaps some more I/O needs to be scheduled. For example after a
-//! `TcpStream` is connected it generates a writable event and also schedules a
-//! read.
-//!
-//! To manage all this the `Selector` uses the `OVERLAPPED` pointer from the
-//! completion status. The selector assumes that all `OVERLAPPED` pointers are
-//! actually pointers to the interior of a `selector::Overlapped` which means
-//! that right after the `OVERLAPPED` itself there's a function pointer. This
-//! function pointer is given the completion status as well as another callback
-//! to push events onto the selector.
-//!
-//! The callback for each I/O operation doesn't have any environment, so it
-//! relies on memory layout and unsafe casting to translate an `OVERLAPPED`
-//! pointer (or in this case a `selector::Overlapped` pointer) to a type of
-//! `FromRawArc<T>` (see module docs for why this type exists).
-//!
-//! ## Thread Safety
-//!
-//! Currently all of the I/O primitives make liberal use of `Arc` and `Mutex`
-//! as an implementation detail. The main reason for this is to ensure that the
-//! types are `Send` and `Sync`, but the implementations have not been stressed
-//! in multithreaded situations yet. As a result, there are bound to be
-//! functional surprises in using these concurrently.
-//!
-//! ## Future Work
-//!
-//! First up, let's take a look at unimplemented portions of this module:
-//!
-//! * The `PollOpt::level()` option is currently entirely unimplemented.
-//! * Each `EventLoop` currently owns its completion port, but this prevents an
-//!   I/O handle from being added to multiple event loops (something that can be
-//!   done on Unix). Additionally, it hinders event loops moving across threads.
-//!   This should be solved by likely having a global `Selector` which all
-//!   others then communicate with.
-//! * Although Unix sockets don't exist on Windows, there are named pipes and
-//!   those should likely be bound here in a similar fashion to `TcpStream`.
-//!
-//! Next up, there are a few performance improvements and optimizations that can
-//! still be implemented
-//!
-//! * Buffer management right now is pretty bad, they're all just allocated
-//!   right before an I/O operation and discarded right after. There should at
-//!   least be some form of buffering buffers.
-//! * No calls to `write` are internally buffered before being scheduled, which
-//!   means that writing performance is abysmal compared to Unix. There should
-//!   be some level of buffering of writes probably.
-
 use std::io;
-use std::os::windows::prelude::*;
+use std::mem::size_of_val;
+use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
+use std::sync::{Arc, Mutex, Once};
+use winapi::ctypes::c_int;
+use winapi::shared::ws2def::SOCKADDR;
+use winapi::um::winsock2::{
+    ioctlsocket, socket, FIONBIO, INVALID_SOCKET, PF_INET, PF_INET6, SOCKET,
+};
 
-use kernel32;
-use winapi;
+/// Helper macro to execute a system call that returns an `io::Result`.
+//
+// Macro must be defined before any modules that uses them.
+macro_rules! syscall {
+    ($fn: ident ( $($arg: expr),* $(,)* ), $err_test: path, $err_value: expr) => {{
+        let res = unsafe { $fn($($arg, )*) };
+        if $err_test(&res, &$err_value) {
+            Err(io::Error::last_os_error())
+        } else {
+            Ok(res)
+        }
+    }};
+}
 
-mod awakener;
-#[macro_use]
+mod afd;
+pub mod event;
+mod io_status_block;
 mod selector;
 mod tcp;
 mod udp;
-mod from_raw_arc;
-mod buffer_pool;
+mod waker;
 
-pub use self::awakener::Awakener;
-pub use self::selector::{Events, Selector, Overlapped, Binding};
-pub use self::tcp::{TcpStream, TcpListener};
-pub use self::udp::UdpSocket;
+pub use event::{Event, Events};
+pub use selector::{Selector, SelectorInner, SockState};
+pub use tcp::{TcpListener, TcpStream};
+pub use udp::UdpSocket;
+pub use waker::Waker;
 
-#[derive(Copy, Clone)]
-enum Family {
-    V4, V6,
+pub trait SocketState {
+    fn get_sock_state(&self) -> Option<Arc<Mutex<SockState>>>;
+    fn set_sock_state(&self, sock_state: Option<Arc<Mutex<SockState>>>);
 }
 
-unsafe fn cancel(socket: &AsRawSocket,
-                 overlapped: &Overlapped) -> io::Result<()> {
-    let handle = socket.as_raw_socket() as winapi::HANDLE;
-    let ret = kernel32::CancelIoEx(handle, overlapped.as_mut_ptr());
-    if ret == 0 {
-        Err(io::Error::last_os_error())
-    } else {
-        Ok(())
+use crate::{Interests, Token};
+
+struct InternalState {
+    selector: Arc<SelectorInner>,
+    token: Token,
+    interests: Interests,
+    sock_state: Option<Arc<Mutex<SockState>>>,
+}
+
+impl InternalState {
+    fn new(selector: Arc<SelectorInner>, token: Token, interests: Interests) -> InternalState {
+        InternalState {
+            selector,
+            token,
+            interests,
+            sock_state: None,
+        }
     }
 }
 
-unsafe fn no_notify_on_instant_completion(handle: winapi::HANDLE) -> io::Result<()> {
-    // TODO: move those to winapi
-    const FILE_SKIP_COMPLETION_PORT_ON_SUCCESS: winapi::UCHAR = 1;
-    const FILE_SKIP_SET_EVENT_ON_HANDLE: winapi::UCHAR = 2;
-
-    let flags = FILE_SKIP_COMPLETION_PORT_ON_SUCCESS | FILE_SKIP_SET_EVENT_ON_HANDLE;
-
-    let r = kernel32::SetFileCompletionNotificationModes(handle, flags);
-    if r == winapi::TRUE {
-        Ok(())
-    } else {
-        Err(io::Error::last_os_error())
+impl Drop for InternalState {
+    fn drop(&mut self) {
+        if let Some(sock_state) = self.sock_state.as_ref() {
+            let mut sock_state = sock_state.lock().unwrap();
+            sock_state.mark_delete();
+        }
+    }
+}
+
+/// Initialise the network stack for Windows.
+fn init() {
+    static INIT: Once = Once::new();
+    INIT.call_once(|| {
+        // Let standard library call `WSAStartup` for us, we can't do it
+        // ourselves because otherwise using any type in `std::net` would panic
+        // when it tries to call `WSAStartup` a second time.
+        drop(std::net::UdpSocket::bind("127.0.0.1:0"));
+    });
+}
+
+/// Create a new non-blocking socket.
+fn new_socket(addr: SocketAddr, socket_type: c_int) -> io::Result<SOCKET> {
+    let domain = match addr {
+        SocketAddr::V4(..) => PF_INET,
+        SocketAddr::V6(..) => PF_INET6,
+    };
+
+    syscall!(
+        socket(domain, socket_type, 0),
+        PartialEq::eq,
+        INVALID_SOCKET
+    )
+    .and_then(|socket| {
+        syscall!(ioctlsocket(socket, FIONBIO, &mut 1), PartialEq::ne, 0).map(|_| socket as SOCKET)
+    })
+}
+
+fn socket_addr(addr: &SocketAddr) -> (*const SOCKADDR, c_int) {
+    match addr {
+        SocketAddr::V4(ref addr) => (
+            addr as *const _ as *const SOCKADDR,
+            size_of_val(addr) as c_int,
+        ),
+        SocketAddr::V6(ref addr) => (
+            addr as *const _ as *const SOCKADDR,
+            size_of_val(addr) as c_int,
+        ),
+    }
+}
+
+fn inaddr_any(other: SocketAddr) -> SocketAddr {
+    match other {
+        SocketAddr::V4(..) => {
+            let any = Ipv4Addr::new(0, 0, 0, 0);
+            let addr = SocketAddrV4::new(any, 0);
+            SocketAddr::V4(addr)
+        }
+        SocketAddr::V6(..) => {
+            let any = Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0);
+            let addr = SocketAddrV6::new(any, 0, 0, 0);
+            SocketAddr::V6(addr)
+        }
     }
 }

src/sys/windows/udp.rs

@@ -1,413 +1,267 @@
-//! UDP for IOCP
-//!
-//! Note that most of this module is quite similar to the TCP module, so if
-//! something seems odd you may also want to try the docs over there.
+use super::selector::SockState;
+use super::InternalState;
+use super::{new_socket, socket_addr};
+use crate::poll;
+use crate::sys::windows::init;
+use crate::{event, Interests, Registry, Token};
 
-use std::fmt;
-use std::io::prelude::*;
-use std::io;
-use std::mem;
 use std::net::{self, Ipv4Addr, Ipv6Addr, SocketAddr};
-use std::sync::{Mutex, MutexGuard};
-
-#[allow(unused_imports)]
-use net2::{UdpBuilder, UdpSocketExt};
-use winapi::*;
-use miow::iocp::CompletionStatus;
-use miow::net::SocketAddrBuf;
-use miow::net::UdpSocketExt as MiowUdpSocketExt;
-
-use {poll, Ready, Poll, PollOpt, Token};
-use event::Evented;
-use sys::windows::from_raw_arc::FromRawArc;
-use sys::windows::selector::{Overlapped, ReadyBinding};
+use std::os::windows::io::{AsRawSocket, FromRawSocket, IntoRawSocket, RawSocket};
+use std::os::windows::raw::SOCKET as StdSocket; // winapi uses usize, stdlib uses u32/u64.
+use std::sync::{Arc, Mutex};
+use std::{fmt, io};
+use winapi::um::winsock2::{bind, closesocket, SOCKET_ERROR, SOCK_DGRAM};
 
 pub struct UdpSocket {
-    imp: Imp,
-    registration: Mutex<Option<poll::Registration>>,
+    internal: Arc<Mutex<Option<InternalState>>>,
+    io: net::UdpSocket,
 }
 
-#[derive(Clone)]
-struct Imp {
-    inner: FromRawArc<Io>,
-}
-
-struct Io {
-    read: Overlapped,
-    write: Overlapped,
-    socket: net::UdpSocket,
-    inner: Mutex<Inner>,
-}
-
-struct Inner {
-    iocp: ReadyBinding,
-    read: State<Vec<u8>, Vec<u8>>,
-    write: State<Vec<u8>, (Vec<u8>, usize)>,
-    read_buf: SocketAddrBuf,
-}
-
-enum State<T, U> {
-    Empty,
-    Pending(T),
-    Ready(U),
-    Error(io::Error),
+macro_rules! wouldblock {
+    ($self:ident, $method:ident, $($args:expr),* )  => {{
+        let result = $self.io.$method($($args),*);
+        if let Err(ref e) = result {
+            if e.kind() == io::ErrorKind::WouldBlock {
+                let internal = $self.internal.lock().unwrap();
+                if internal.is_some() {
+                    let selector = internal.as_ref().unwrap().selector.clone();
+                    let token = internal.as_ref().unwrap().token;
+                    let interests = internal.as_ref().unwrap().interests;
+                    drop(internal);
+                    selector.reregister(
+                        $self,
+                        token,
+                        interests,
+                    )?;
+                }
+            }
+        }
+        result
+    }};
 }
 
 impl UdpSocket {
-    pub fn new(socket: net::UdpSocket) -> io::Result<UdpSocket> {
-        Ok(UdpSocket {
-            registration: Mutex::new(None),
-            imp: Imp {
-                inner: FromRawArc::new(Io {
-                    read: Overlapped::new(recv_done),
-                    write: Overlapped::new(send_done),
-                    socket: socket,
-                    inner: Mutex::new(Inner {
-                        iocp: ReadyBinding::new(),
-                        read: State::Empty,
-                        write: State::Empty,
-                        read_buf: SocketAddrBuf::new(),
-                    }),
-                }),
-            },
+    pub fn bind(addr: SocketAddr) -> io::Result<UdpSocket> {
+        init();
+        new_socket(addr, SOCK_DGRAM).and_then(|socket| {
+            let (raw_addr, raw_addr_length) = socket_addr(&addr);
+            syscall!(
+                bind(socket, raw_addr, raw_addr_length,),
+                PartialEq::eq,
+                SOCKET_ERROR
+            )
+            .map_err(|err| {
+                // Close the socket if we hit an error, ignoring the error
+                // from closing since we can't pass back two errors.
+                let _ = unsafe { closesocket(socket) };
+                err
+            })
+            .map(|_| UdpSocket {
+                internal: Arc::new(Mutex::new(None)),
+                io: unsafe { net::UdpSocket::from_raw_socket(socket as StdSocket) },
+            })
         })
     }
 
     pub fn local_addr(&self) -> io::Result<SocketAddr> {
-        self.imp.inner.socket.local_addr()
+        self.io.local_addr()
     }
 
     pub fn try_clone(&self) -> io::Result<UdpSocket> {
-        self.imp.inner.socket.try_clone().and_then(UdpSocket::new)
+        self.io.try_clone().map(|io| UdpSocket {
+            internal: Arc::new(Mutex::new(None)),
+            io,
+        })
     }
 
-    /// Note that unlike `TcpStream::write` this function will not attempt to
-    /// continue writing `buf` until its entirely written.
-    ///
-    /// TODO: This... may be wrong in the long run. We're reporting that we
-    ///       successfully wrote all of the bytes in `buf` but it's possible
-    ///       that we don't actually end up writing all of them!
-    pub fn send_to(&self, buf: &[u8], target: &SocketAddr)
-                   -> io::Result<usize> {
-        let mut me = self.inner();
-        let me = &mut *me;
-
-        match me.write {
-            State::Empty => {}
-            _ => return Err(io::ErrorKind::WouldBlock.into()),
-        }
-
-        if !me.iocp.registered() {
-            return Err(io::ErrorKind::WouldBlock.into())
-        }
-
-        let interest = me.iocp.readiness();
-        me.iocp.set_readiness(interest - Ready::writable());
-
-        let mut owned_buf = me.iocp.get_buffer(64 * 1024);
-        let amt = owned_buf.write(buf)?;
-        unsafe {
-            trace!("scheduling a send");
-            self.imp.inner.socket.send_to_overlapped(&owned_buf, target,
-                                                     self.imp.inner.write.as_mut_ptr())
-        }?;
-        me.write = State::Pending(owned_buf);
-        mem::forget(self.imp.clone());
-        Ok(amt)
+    pub fn send_to(&self, buf: &[u8], target: SocketAddr) -> io::Result<usize> {
+        wouldblock!(self, send_to, buf, target)
+    }
+
+    pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+        wouldblock!(self, recv_from, buf)
+    }
+
+    pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+        wouldblock!(self, peek_from, buf)
     }
 
-    /// Note that unlike `TcpStream::write` this function will not attempt to
-    /// continue writing `buf` until its entirely written.
-    ///
-    /// TODO: This... may be wrong in the long run. We're reporting that we
-    ///       successfully wrote all of the bytes in `buf` but it's possible
-    ///       that we don't actually end up writing all of them!
     pub fn send(&self, buf: &[u8]) -> io::Result<usize> {
-        let mut me = self.inner();
-        let me = &mut *me;
-
-        match me.write {
-            State::Empty => {}
-            _ => return Err(io::ErrorKind::WouldBlock.into()),
-        }
-
-        if !me.iocp.registered() {
-            return Err(io::ErrorKind::WouldBlock.into())
-        }
-
-        let interest = me.iocp.readiness();
-        me.iocp.set_readiness(interest - Ready::writable());
-
-        let mut owned_buf = me.iocp.get_buffer(64 * 1024);
-        let amt = owned_buf.write(buf)?;
-        unsafe {
-            trace!("scheduling a send");
-            self.imp.inner.socket.send_overlapped(&owned_buf, self.imp.inner.write.as_mut_ptr())
-
-        }?;
-        me.write = State::Pending(owned_buf);
-        mem::forget(self.imp.clone());
-        Ok(amt)
+        wouldblock!(self, send, buf)
     }
 
-    pub fn recv_from(&self, mut buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
-        let mut me = self.inner();
-        match mem::replace(&mut me.read, State::Empty) {
-            State::Empty => Err(io::ErrorKind::WouldBlock.into()),
-            State::Pending(b) => { me.read = State::Pending(b); Err(io::ErrorKind::WouldBlock.into()) }
-            State::Ready(data) => {
-                // If we weren't provided enough space to receive the message
-                // then don't actually read any data, just return an error.
-                if buf.len() < data.len() {
-                    me.read = State::Ready(data);
-                    Err(io::Error::from_raw_os_error(WSAEMSGSIZE as i32))
-                } else {
-                    let r = if let Some(addr) = me.read_buf.to_socket_addr() {
-                        buf.write(&data).unwrap();
-                        Ok((data.len(), addr))
-                    } else {
-                        Err(io::Error::new(io::ErrorKind::Other,
-                                           "failed to parse socket address"))
-                    };
-                    me.iocp.put_buffer(data);
-                    self.imp.schedule_read_from(&mut me);
-                    r
-                }
-            }
-            State::Error(e) => {
-                self.imp.schedule_read_from(&mut me);
-                Err(e)
-            }
-        }
+    pub fn recv(&self, buf: &mut [u8]) -> io::Result<usize> {
+        wouldblock!(self, recv, buf)
     }
 
-    pub fn recv(&self, buf: &mut [u8])
-                     -> io::Result<usize> {
-        //Since recv_from can be used on connected sockets just call it and drop the address.
-        self.recv_from(buf).map(|(size,_)| size)
+    pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
+        wouldblock!(self, peek, buf)
     }
 
     pub fn connect(&self, addr: SocketAddr) -> io::Result<()> {
-        self.imp.inner.socket.connect(addr)
+        self.io.connect(addr)
     }
 
     pub fn broadcast(&self) -> io::Result<bool> {
-        self.imp.inner.socket.broadcast()
+        self.io.broadcast()
     }
 
     pub fn set_broadcast(&self, on: bool) -> io::Result<()> {
-        self.imp.inner.socket.set_broadcast(on)
+        self.io.set_broadcast(on)
     }
 
     pub fn multicast_loop_v4(&self) -> io::Result<bool> {
-        self.imp.inner.socket.multicast_loop_v4()
+        self.io.multicast_loop_v4()
     }
 
     pub fn set_multicast_loop_v4(&self, on: bool) -> io::Result<()> {
-        self.imp.inner.socket.set_multicast_loop_v4(on)
+        self.io.set_multicast_loop_v4(on)
     }
 
     pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
-        self.imp.inner.socket.multicast_ttl_v4()
+        self.io.multicast_ttl_v4()
     }
 
     pub fn set_multicast_ttl_v4(&self, ttl: u32) -> io::Result<()> {
-        self.imp.inner.socket.set_multicast_ttl_v4(ttl)
+        self.io.set_multicast_ttl_v4(ttl)
     }
 
     pub fn multicast_loop_v6(&self) -> io::Result<bool> {
-        self.imp.inner.socket.multicast_loop_v6()
+        self.io.multicast_loop_v6()
     }
 
     pub fn set_multicast_loop_v6(&self, on: bool) -> io::Result<()> {
-        self.imp.inner.socket.set_multicast_loop_v6(on)
+        self.io.set_multicast_loop_v6(on)
     }
 
     pub fn ttl(&self) -> io::Result<u32> {
-        self.imp.inner.socket.ttl()
+        self.io.ttl()
     }
 
     pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
-        self.imp.inner.socket.set_ttl(ttl)
+        self.io.set_ttl(ttl)
     }
 
-    pub fn join_multicast_v4(&self,
-                             multiaddr: &Ipv4Addr,
-                             interface: &Ipv4Addr) -> io::Result<()> {
-        self.imp.inner.socket.join_multicast_v4(multiaddr, interface)
+    pub fn join_multicast_v4(&self, multiaddr: Ipv4Addr, interface: Ipv4Addr) -> io::Result<()> {
+        self.io.join_multicast_v4(&multiaddr, &interface)
     }
 
-    pub fn join_multicast_v6(&self,
-                             multiaddr: &Ipv6Addr,
-                             interface: u32) -> io::Result<()> {
-        self.imp.inner.socket.join_multicast_v6(multiaddr, interface)
+    pub fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
+        self.io.join_multicast_v6(multiaddr, interface)
     }
 
-    pub fn leave_multicast_v4(&self,
-                              multiaddr: &Ipv4Addr,
-                              interface: &Ipv4Addr) -> io::Result<()> {
-        self.imp.inner.socket.leave_multicast_v4(multiaddr, interface)
+    pub fn leave_multicast_v4(&self, multiaddr: Ipv4Addr, interface: Ipv4Addr) -> io::Result<()> {
+        self.io.leave_multicast_v4(&multiaddr, &interface)
     }
 
-    pub fn leave_multicast_v6(&self,
-                              multiaddr: &Ipv6Addr,
-                              interface: u32) -> io::Result<()> {
-        self.imp.inner.socket.leave_multicast_v6(multiaddr, interface)
-    }
-
-    pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> {
-        self.imp.inner.socket.set_only_v6(only_v6)
-    }
-
-    pub fn only_v6(&self) -> io::Result<bool> {
-        self.imp.inner.socket.only_v6()
+    pub fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
+        self.io.leave_multicast_v6(multiaddr, interface)
     }
 
     pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        self.imp.inner.socket.take_error()
-    }
-
-    fn inner(&self) -> MutexGuard<Inner> {
-        self.imp.inner()
-    }
-
-    fn post_register(&self, interest: Ready, me: &mut Inner) {
-        if interest.is_readable() {
-            //We use recv_from here since it is well specified for both
-            //connected and non-connected sockets and we can discard the address
-            //when calling recv().
-            self.imp.schedule_read_from(me);
-        }
-        // See comments in TcpSocket::post_register for what's going on here
-        if interest.is_writable() {
-            if let State::Empty = me.write {
-                self.imp.add_readiness(me, Ready::writable());
-            }
-        }
+        self.io.take_error()
     }
 }
 
-impl Imp {
-    fn inner(&self) -> MutexGuard<Inner> {
-        self.inner.inner.lock().unwrap()
-    }
-
-    fn schedule_read_from(&self, me: &mut Inner) {
-        match me.read {
-            State::Empty => {}
-            _ => return,
+impl super::SocketState for UdpSocket {
+    fn get_sock_state(&self) -> Option<Arc<Mutex<SockState>>> {
+        let internal = self.internal.lock().unwrap();
+        match &*internal {
+            Some(internal) => match &internal.sock_state {
+                Some(arc) => Some(arc.clone()),
+                None => None,
+            },
+            None => None,
         }
-
-        let interest = me.iocp.readiness();
-        me.iocp.set_readiness(interest - Ready::readable());
-
-        let mut buf = me.iocp.get_buffer(64 * 1024);
-        let res = unsafe {
-            trace!("scheduling a read");
-            let cap = buf.capacity();
-            buf.set_len(cap);
-            self.inner.socket.recv_from_overlapped(&mut buf, &mut me.read_buf,
-                                                   self.inner.read.as_mut_ptr())
+    }
+    fn set_sock_state(&self, sock_state: Option<Arc<Mutex<SockState>>>) {
+        let mut internal = self.internal.lock().unwrap();
+        match &mut *internal {
+            Some(internal) => {
+                internal.sock_state = sock_state;
+            }
+            None => {}
         };
-        match res {
-            Ok(_) => {
-                me.read = State::Pending(buf);
-                mem::forget(self.clone());
-            }
-            Err(e) => {
-                me.read = State::Error(e);
-                self.add_readiness(me, Ready::readable());
-                me.iocp.put_buffer(buf);
-            }
-        }
-    }
-
-    // See comments in tcp::StreamImp::push
-    fn add_readiness(&self, me: &Inner, set: Ready) {
-        me.iocp.set_readiness(set | me.iocp.readiness());
     }
 }
 
-impl Evented for UdpSocket {
-    fn register(&self, poll: &Poll, token: Token,
-                interest: Ready, opts: PollOpt) -> io::Result<()> {
-        let mut me = self.inner();
-        me.iocp.register_socket(&self.imp.inner.socket,
-                                     poll, token, interest, opts,
-                                     &self.registration)?;
-        self.post_register(interest, &mut me);
-        Ok(())
+impl event::Source for UdpSocket {
+    fn register(&self, registry: &Registry, token: Token, interests: Interests) -> io::Result<()> {
+        {
+            let mut internal = self.internal.lock().unwrap();
+            if internal.is_none() {
+                *internal = Some(InternalState::new(
+                    poll::selector(registry).clone_inner(),
+                    token,
+                    interests,
+                ));
+            }
+        }
+        let result = poll::selector(registry).register(self, token, interests);
+        match result {
+            Ok(_) => {}
+            Err(_) => {
+                let mut internal = self.internal.lock().unwrap();
+                *internal = None;
+            }
+        }
+        result
     }
 
-    fn reregister(&self, poll: &Poll, token: Token,
-                  interest: Ready, opts: PollOpt) -> io::Result<()> {
-        let mut me = self.inner();
-        me.iocp.reregister_socket(&self.imp.inner.socket,
-                                       poll, token, interest,
-                                       opts, &self.registration)?;
-        self.post_register(interest, &mut me);
-        Ok(())
+    fn reregister(
+        &self,
+        registry: &Registry,
+        token: Token,
+        interests: Interests,
+    ) -> io::Result<()> {
+        let result = poll::selector(registry).reregister(self, token, interests);
+        match result {
+            Ok(_) => {
+                let mut internal = self.internal.lock().unwrap();
+                internal.as_mut().unwrap().token = token;
+                internal.as_mut().unwrap().interests = interests;
+            }
+            Err(_) => {}
+        };
+        result
     }
 
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.inner().iocp.deregister(&self.imp.inner.socket,
-                                     poll, &self.registration)
+    fn deregister(&self, registry: &Registry) -> io::Result<()> {
+        let result = poll::selector(registry).deregister(self);
+        match result {
+            Ok(_) => {
+                let mut internal = self.internal.lock().unwrap();
+                *internal = None;
+            }
+            Err(_) => {}
+        };
+        result
     }
 }
 
 impl fmt::Debug for UdpSocket {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_struct("UdpSocket")
-            .finish()
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Debug::fmt(&self.io, f)
     }
 }
 
-impl Drop for UdpSocket {
-    fn drop(&mut self) {
-        let inner = self.inner();
-
-        // If we're still internally reading, we're no longer interested. Note
-        // though that we don't cancel any writes which may have been issued to
-        // preserve the same semantics as Unix.
-        unsafe {
-            match inner.read {
-                State::Pending(_) => {
-                    drop(super::cancel(&self.imp.inner.socket,
-                                       &self.imp.inner.read));
-                }
-                State::Empty |
-                State::Ready(_) |
-                State::Error(_) => {}
-            }
+impl FromRawSocket for UdpSocket {
+    unsafe fn from_raw_socket(rawsocket: RawSocket) -> UdpSocket {
+        UdpSocket {
+            internal: Arc::new(Mutex::new(None)),
+            io: net::UdpSocket::from_raw_socket(rawsocket),
         }
     }
 }
 
-fn send_done(status: &OVERLAPPED_ENTRY) {
-    let status = CompletionStatus::from_entry(status);
-    trace!("finished a send {}", status.bytes_transferred());
-    let me2 = Imp {
-        inner: unsafe { overlapped2arc!(status.overlapped(), Io, write) },
-    };
-    let mut me = me2.inner();
-    me.write = State::Empty;
-    me2.add_readiness(&mut me, Ready::writable());
+impl IntoRawSocket for UdpSocket {
+    fn into_raw_socket(self) -> RawSocket {
+        self.io.as_raw_socket()
+    }
 }
 
-fn recv_done(status: &OVERLAPPED_ENTRY) {
-    let status = CompletionStatus::from_entry(status);
-    trace!("finished a recv {}", status.bytes_transferred());
-    let me2 = Imp {
-        inner: unsafe { overlapped2arc!(status.overlapped(), Io, read) },
-    };
-    let mut me = me2.inner();
-    let mut buf = match mem::replace(&mut me.read, State::Empty) {
-        State::Pending(buf) => buf,
-        _ => unreachable!(),
-    };
-    unsafe {
-        buf.set_len(status.bytes_transferred() as usize);
+impl AsRawSocket for UdpSocket {
+    fn as_raw_socket(&self) -> RawSocket {
+        self.io.as_raw_socket()
     }
-    me.read = State::Ready(buf);
-    me2.add_readiness(&mut me, Ready::readable());
 }

src/sys/windows/waker.rs

@@ -0,0 +1,27 @@
+use crate::sys::windows::{Selector, SelectorInner};
+use crate::Token;
+
+use miow::iocp::CompletionStatus;
+use std::io;
+use std::sync::Arc;
+
+#[derive(Debug)]
+pub struct Waker {
+    token: Token,
+    selector: Arc<SelectorInner>,
+}
+
+impl Waker {
+    pub fn new(selector: &Selector, token: Token) -> io::Result<Waker> {
+        Ok(Waker {
+            token,
+            selector: selector.clone_inner(),
+        })
+    }
+
+    pub fn wake(&self) -> io::Result<()> {
+        // Keep NULL as Overlapped value to notify waking.
+        let status = CompletionStatus::new(0, self.token.0, 0 as *mut _);
+        self.selector.port().post(status)
+    }
+}

src/timer.rs

@@ -1,516 +0,0 @@
-//! Timer optimized for I/O related operations
-
-#![allow(deprecated, missing_debug_implementations)]
-
-use {convert, io, Ready, Poll, PollOpt, Registration, SetReadiness, Token};
-use event::Evented;
-use lazycell::LazyCell;
-use slab::Slab;
-use std::{cmp, error, fmt, u64, usize, iter, thread};
-use std::sync::Arc;
-use std::sync::atomic::{AtomicUsize, Ordering};
-use std::time::{Duration, Instant};
-
-use self::TimerErrorKind::TimerOverflow;
-
-pub struct Timer<T> {
-    // Size of each tick in milliseconds
-    tick_ms: u64,
-    // Slab of timeout entries
-    entries: Slab<Entry<T>>,
-    // Timeout wheel. Each tick, the timer will look at the next slot for
-    // timeouts that match the current tick.
-    wheel: Vec<WheelEntry>,
-    // Tick 0's time instant
-    start: Instant,
-    // The current tick
-    tick: Tick,
-    // The next entry to possibly timeout
-    next: Token,
-    // Masks the target tick to get the slot
-    mask: u64,
-    // Set on registration with Poll
-    inner: LazyCell<Inner>,
-}
-
-pub struct Builder {
-    // Approximate duration of each tick
-    tick: Duration,
-    // Number of slots in the timer wheel
-    num_slots: usize,
-    // Max number of timeouts that can be in flight at a given time.
-    capacity: usize,
-}
-
-#[derive(Clone, Debug)]
-pub struct Timeout {
-    // Reference into the timer entry slab
-    token: Token,
-    // Tick that it should match up with
-    tick: u64,
-}
-
-struct Inner {
-    registration: Registration,
-    set_readiness: SetReadiness,
-    wakeup_state: WakeupState,
-    wakeup_thread: thread::JoinHandle<()>,
-}
-
-impl Drop for Inner {
-    fn drop(&mut self) {
-        // 1. Set wakeup state to TERMINATE_THREAD (https://github.com/carllerche/mio/blob/master/src/timer.rs#L451)
-        self.wakeup_state.store(TERMINATE_THREAD, Ordering::Release);
-        // 2. Wake him up
-        self.wakeup_thread.thread().unpark();
-    }
-}
-
-#[derive(Copy, Clone, Debug)]
-struct WheelEntry {
-    next_tick: Tick,
-    head: Token,
-}
-
-// Doubly linked list of timer entries. Allows for efficient insertion /
-// removal of timeouts.
-struct Entry<T> {
-    state: T,
-    links: EntryLinks,
-}
-
-#[derive(Copy, Clone)]
-struct EntryLinks {
-    tick: Tick,
-    prev: Token,
-    next: Token
-}
-
-type Tick = u64;
-
-const TICK_MAX: Tick = u64::MAX;
-
-// Manages communication with wakeup thread
-type WakeupState = Arc<AtomicUsize>;
-
-pub type Result<T> = ::std::result::Result<T, TimerError>;
-// TODO: remove
-pub type TimerResult<T> = Result<T>;
-
-
-/// Deprecated and unused.
-#[derive(Debug)]
-pub struct TimerError;
-
-/// Deprecated and unused.
-#[derive(Debug)]
-pub enum TimerErrorKind {
-    TimerOverflow,
-}
-
-// TODO: Remove
-pub type OldTimerResult<T> = Result<T>;
-
-const TERMINATE_THREAD: usize = 0;
-const EMPTY: Token = Token(usize::MAX);
-
-impl Builder {
-    pub fn tick_duration(mut self, duration: Duration) -> Builder {
-        self.tick = duration;
-        self
-    }
-
-    pub fn num_slots(mut self, num_slots: usize) -> Builder {
-        self.num_slots = num_slots;
-        self
-    }
-
-    pub fn capacity(mut self, capacity: usize) -> Builder {
-        self.capacity = capacity;
-        self
-    }
-
-    pub fn build<T>(self) -> Timer<T> {
-        Timer::new(convert::millis(self.tick), self.num_slots, self.capacity, Instant::now())
-    }
-}
-
-impl Default for Builder {
-    fn default() -> Builder {
-        Builder {
-            tick: Duration::from_millis(100),
-            num_slots: 256,
-            capacity: 65_536,
-        }
-    }
-}
-
-impl<T> Timer<T> {
-    fn new(tick_ms: u64, num_slots: usize, capacity: usize, start: Instant) -> Timer<T> {
-        let num_slots = num_slots.next_power_of_two();
-        let capacity = capacity.next_power_of_two();
-        let mask = (num_slots as u64) - 1;
-        let wheel = iter::repeat(WheelEntry { next_tick: TICK_MAX, head: EMPTY })
-            .take(num_slots).collect();
-
-        Timer {
-            tick_ms,
-            entries: Slab::with_capacity(capacity),
-            wheel,
-            start,
-            tick: 0,
-            next: EMPTY,
-            mask,
-            inner: LazyCell::new(),
-        }
-    }
-
-    pub fn set_timeout(&mut self, delay_from_now: Duration, state: T) -> Result<Timeout> {
-        let delay_from_start = self.start.elapsed() + delay_from_now;
-        self.set_timeout_at(delay_from_start, state)
-    }
-
-    fn set_timeout_at(&mut self, delay_from_start: Duration, state: T) -> Result<Timeout> {
-        let mut tick = duration_to_tick(delay_from_start, self.tick_ms);
-        trace!("setting timeout; delay={:?}; tick={:?}; current-tick={:?}", delay_from_start, tick, self.tick);
-
-        // Always target at least 1 tick in the future
-        if tick <= self.tick {
-            tick = self.tick + 1;
-        }
-
-        self.insert(tick, state)
-    }
-
-    fn insert(&mut self, tick: Tick, state: T) -> Result<Timeout> {
-        // Get the slot for the requested tick
-        let slot = (tick & self.mask) as usize;
-        let curr = self.wheel[slot];
-
-        // Insert the new entry
-        let entry = Entry::new(state, tick, curr.head);
-        let token = Token(self.entries.insert(entry));
-
-        if curr.head != EMPTY {
-            // If there was a previous entry, set its prev pointer to the new
-            // entry
-            self.entries[curr.head.into()].links.prev = token;
-        }
-
-        // Update the head slot
-        self.wheel[slot] = WheelEntry {
-            next_tick: cmp::min(tick, curr.next_tick),
-            head: token,
-        };
-
-        self.schedule_readiness(tick);
-
-        trace!("inserted timeout; slot={}; token={:?}", slot, token);
-
-        // Return the new timeout
-        Ok(Timeout {
-            token,
-            tick
-        })
-    }
-
-    pub fn cancel_timeout(&mut self, timeout: &Timeout) -> Option<T> {
-        let links = match self.entries.get(timeout.token.into()) {
-            Some(e) => e.links,
-            None => return None
-        };
-
-        // Sanity check
-        if links.tick != timeout.tick {
-            return None;
-        }
-
-        self.unlink(&links, timeout.token);
-        Some(self.entries.remove(timeout.token.into()).state)
-    }
-
-    pub fn poll(&mut self) -> Option<T> {
-        let target_tick = current_tick(self.start, self.tick_ms);
-        self.poll_to(target_tick)
-    }
-
-    fn poll_to(&mut self, mut target_tick: Tick) -> Option<T> {
-        trace!("tick_to; target_tick={}; current_tick={}", target_tick, self.tick);
-
-        if target_tick < self.tick {
-            target_tick = self.tick;
-        }
-
-        while self.tick <= target_tick {
-            let curr = self.next;
-
-            trace!("ticking; curr={:?}", curr);
-
-            if curr == EMPTY {
-                self.tick += 1;
-
-                let slot = self.slot_for(self.tick);
-                self.next = self.wheel[slot].head;
-
-                // Handle the case when a slot has a single timeout which gets
-                // canceled before the timeout expires. In this case, the
-                // slot's head is EMPTY but there is a value for next_tick. Not
-                // resetting next_tick here causes the timer to get stuck in a
-                // loop.
-                if self.next == EMPTY {
-                    self.wheel[slot].next_tick = TICK_MAX;
-                }
-            } else {
-                let slot = self.slot_for(self.tick);
-
-                if curr == self.wheel[slot].head {
-                    self.wheel[slot].next_tick = TICK_MAX;
-                }
-
-                let links = self.entries[curr.into()].links;
-
-                if links.tick <= self.tick {
-                    trace!("triggering; token={:?}", curr);
-
-                    // Unlink will also advance self.next
-                    self.unlink(&links, curr);
-
-                    // Remove and return the token
-                    return Some(self.entries.remove(curr.into()).state);
-                } else {
-                    let next_tick = self.wheel[slot].next_tick;
-                    self.wheel[slot].next_tick = cmp::min(next_tick, links.tick);
-                    self.next = links.next;
-                }
-            }
-        }
-
-        // No more timeouts to poll
-        if let Some(inner) = self.inner.borrow() {
-            trace!("unsetting readiness");
-            let _ = inner.set_readiness.set_readiness(Ready::empty());
-
-            if let Some(tick) = self.next_tick() {
-                self.schedule_readiness(tick);
-            }
-        }
-
-        None
-    }
-
-    fn unlink(&mut self, links: &EntryLinks, token: Token) {
-       trace!("unlinking timeout; slot={}; token={:?}",
-               self.slot_for(links.tick), token);
-
-        if links.prev == EMPTY {
-            let slot = self.slot_for(links.tick);
-            self.wheel[slot].head = links.next;
-        } else {
-            self.entries[links.prev.into()].links.next = links.next;
-        }
-
-        if links.next != EMPTY {
-            self.entries[links.next.into()].links.prev = links.prev;
-
-            if token == self.next {
-                self.next = links.next;
-            }
-        } else if token == self.next {
-            self.next = EMPTY;
-        }
-    }
-
-    fn schedule_readiness(&self, tick: Tick) {
-        if let Some(inner) = self.inner.borrow() {
-            // Coordinate setting readiness w/ the wakeup thread
-            let mut curr = inner.wakeup_state.load(Ordering::Acquire);
-
-            loop {
-                if curr as Tick <= tick {
-                    // Nothing to do, wakeup is already scheduled
-                    return;
-                }
-
-                // Attempt to move the wakeup time forward
-                trace!("advancing the wakeup time; target={}; curr={}", tick, curr);
-                let actual = inner.wakeup_state.compare_and_swap(curr, tick as usize, Ordering::Release);
-
-                if actual == curr {
-                    // Signal to the wakeup thread that the wakeup time has
-                    // been changed.
-                    trace!("unparking wakeup thread");
-                    inner.wakeup_thread.thread().unpark();
-                    return;
-                }
-
-                curr = actual;
-            }
-        }
-    }
-
-    // Next tick containing a timeout
-    fn next_tick(&self) -> Option<Tick> {
-        if self.next != EMPTY {
-            let slot = self.slot_for(self.entries[self.next.into()].links.tick);
-
-            if self.wheel[slot].next_tick == self.tick {
-                // There is data ready right now
-                return Some(self.tick);
-            }
-        }
-
-        self.wheel.iter().map(|e| e.next_tick).min()
-    }
-
-    fn slot_for(&self, tick: Tick) -> usize {
-        (self.mask & tick) as usize
-    }
-}
-
-impl<T> Default for Timer<T> {
-    fn default() -> Timer<T> {
-        Builder::default().build()
-    }
-}
-
-impl<T> Evented for Timer<T> {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        if self.inner.borrow().is_some() {
-            return Err(io::Error::new(io::ErrorKind::Other, "timer already registered"));
-        }
-
-        let (registration, set_readiness) = Registration::new(poll, token, interest, opts);
-        let wakeup_state = Arc::new(AtomicUsize::new(usize::MAX));
-        let thread_handle = spawn_wakeup_thread(
-            wakeup_state.clone(),
-            set_readiness.clone(),
-            self.start, self.tick_ms);
-
-        self.inner.fill(Inner {
-            registration,
-            set_readiness,
-            wakeup_state,
-            wakeup_thread: thread_handle,
-        }).expect("timer already registered");
-
-        if let Some(next_tick) = self.next_tick() {
-            self.schedule_readiness(next_tick);
-        }
-
-        Ok(())
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        match self.inner.borrow() {
-            Some(inner) => inner.registration.update(poll, token, interest, opts),
-            None => Err(io::Error::new(io::ErrorKind::Other, "receiver not registered")),
-        }
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        match self.inner.borrow() {
-            Some(inner) => inner.registration.deregister(poll),
-            None => Err(io::Error::new(io::ErrorKind::Other, "receiver not registered")),
-        }
-    }
-}
-
-impl fmt::Debug for Inner {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt.debug_struct("Inner")
-            .field("registration", &self.registration)
-            .field("wakeup_state", &self.wakeup_state.load(Ordering::Relaxed))
-            .finish()
-    }
-}
-
-fn spawn_wakeup_thread(state: WakeupState, set_readiness: SetReadiness, start: Instant, tick_ms: u64) -> thread::JoinHandle<()> {
-    thread::spawn(move || {
-        let mut sleep_until_tick = state.load(Ordering::Acquire) as Tick;
-
-        loop {
-            if sleep_until_tick == TERMINATE_THREAD as Tick {
-                return;
-            }
-
-            let now_tick = current_tick(start, tick_ms);
-
-            trace!("wakeup thread: sleep_until_tick={:?}; now_tick={:?}", sleep_until_tick, now_tick);
-
-            if now_tick < sleep_until_tick {
-                // Calling park_timeout with u64::MAX leads to undefined
-                // behavior in pthread, causing the park to return immediately
-                // and causing the thread to tightly spin. Instead of u64::MAX
-                // on large values, simply use a blocking park.
-                match tick_ms.checked_mul(sleep_until_tick - now_tick) {
-                    Some(sleep_duration) => {
-                        trace!("sleeping; tick_ms={}; now_tick={}; sleep_until_tick={}; duration={:?}",
-                               tick_ms, now_tick, sleep_until_tick, sleep_duration);
-                        thread::park_timeout(Duration::from_millis(sleep_duration));
-                    }
-                    None => {
-                        trace!("sleeping; tick_ms={}; now_tick={}; blocking sleep",
-                               tick_ms, now_tick);
-                        thread::park();
-                    }
-                }
-                sleep_until_tick = state.load(Ordering::Acquire) as Tick;
-            } else {
-                let actual = state.compare_and_swap(sleep_until_tick as usize, usize::MAX, Ordering::AcqRel) as Tick;
-
-                if actual == sleep_until_tick {
-                    trace!("setting readiness from wakeup thread");
-                    let _ = set_readiness.set_readiness(Ready::readable());
-                    sleep_until_tick = usize::MAX as Tick;
-                } else {
-                    sleep_until_tick = actual as Tick;
-                }
-            }
-        }
-    })
-}
-
-fn duration_to_tick(elapsed: Duration, tick_ms: u64) -> Tick {
-    // Calculate tick rounding up to the closest one
-    let elapsed_ms = convert::millis(elapsed);
-    elapsed_ms.saturating_add(tick_ms / 2) / tick_ms
-}
-
-fn current_tick(start: Instant, tick_ms: u64) -> Tick {
-    duration_to_tick(start.elapsed(), tick_ms)
-}
-
-impl<T> Entry<T> {
-    fn new(state: T, tick: u64, next: Token) -> Entry<T> {
-        Entry {
-            state,
-            links: EntryLinks {
-                tick,
-                prev: EMPTY,
-                next,
-            },
-        }
-    }
-}
-
-impl fmt::Display for TimerError {
-    fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result {
-        // `TimerError` will never be constructed.
-        unreachable!();
-    }
-}
-
-impl error::Error for TimerError {
-    fn description(&self) -> &str {
-        // `TimerError` will never be constructed.
-        unreachable!();
-    }
-}
-
-impl fmt::Display for TimerErrorKind {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            TimerOverflow => write!(fmt, "TimerOverflow"),
-        }
-    }
-}

src/token.rs

@@ -1,19 +1,26 @@
-/// Associates readiness notifications with [`Evented`] handles.
+/// Associates readiness events with [`event::Source`]s.
 ///
 /// `Token` is a wrapper around `usize` and is used as an argument to
-/// [`Poll::register`] and [`Poll::reregister`].
+/// [`Registry::register`] and [`Registry::reregister`].
 ///
 /// See [`Poll`] for more documentation on polling.
 ///
+/// [`event::Source`]: crate::event::Source
+/// [`Poll`]: crate::Poll
+/// [`Registry::register`]: crate::Registry::register
+/// [`Registry::reregister`]: crate::Registry::reregister
+///
 /// # Example
 ///
-/// Using `Token` to track which socket generated the notification. In this
-/// example, `HashMap` is used, but usually something like [`slab`] is better.
+/// Using `Token` to track which socket generated the event. In this example,
+/// `HashMap` is used, but usually something like [`slab`] is better.
+///
+/// [`slab`]: https://crates.io/crates/slab
 ///
 /// ```
 /// # use std::error::Error;
-/// # fn try_main() -> Result<(), Box<Error>> {
-/// use mio::{Events, Ready, Poll, PollOpt, Token};
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Events, Interests, Poll, Token};
 /// use mio::net::TcpListener;
 ///
 /// use std::thread;
@@ -34,16 +41,13 @@
 /// let mut next_socket_index = 0;
 ///
 /// // The `Poll` instance
-/// let poll = Poll::new()?;
+/// let mut poll = Poll::new()?;
 ///
 /// // Tcp listener
-/// let listener = TcpListener::bind(&"127.0.0.1:0".parse()?)?;
+/// let listener = TcpListener::bind("127.0.0.1:0".parse()?)?;
 ///
 /// // Register the listener
-/// poll.register(&listener,
-///               LISTENER,
-///               Ready::readable(),
-///               PollOpt::edge())?;
+/// poll.registry().register(&listener, LISTENER, Interests::READABLE)?;
 ///
 /// // Spawn a thread that will connect a bunch of sockets then close them
 /// let addr = listener.local_addr()?;
@@ -53,7 +57,7 @@
 ///     // +1 here is to connect an extra socket to signal the socket to close
 ///     for _ in 0..(MAX_SOCKETS+1) {
 ///         // Connect then drop the socket
-///         let _ = TcpStream::connect(&addr).unwrap();
+///         let _ = TcpStream::connect(addr).unwrap();
 ///     }
 /// });
 ///
@@ -86,10 +90,7 @@
 ///                             next_socket_index += 1;
 ///
 ///                             // Register the new socket w/ poll
-///                             poll.register(&socket,
-///                                          token,
-///                                          Ready::readable(),
-///                                          PollOpt::edge())?;
+///                             poll.registry().register(&socket, token, Interests::READABLE)?;
 ///
 ///                             // Store the socket
 ///                             sockets.insert(token, socket);
@@ -124,19 +125,8 @@
 ///         }
 ///     }
 /// }
-/// #     Ok(())
-/// # }
-/// #
-/// # fn main() {
-/// #     try_main().unwrap();
 /// # }
 /// ```
-///
-/// [`Evented`]: event/trait.Evented.html
-/// [`Poll`]: struct.Poll.html
-/// [`Poll::register`]: struct.Poll.html#method.register
-/// [`Poll::reregister`]: struct.Poll.html#method.reregister
-/// [`slab`]: https://crates.io/crates/slab
 #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct Token(pub usize);
 

src/udp.rs

@@ -1,326 +0,0 @@
-//! Primitives for working with UDP
-//!
-//! The types provided in this module are non-blocking by default and are
-//! designed to be portable across all supported Mio platforms. As long as the
-//! [portability guidelines] are followed, the behavior should be identical no
-//! matter the target platform.
-//!
-//! [portability guidelines]: ../struct.Poll.html#portability
-
-#![allow(deprecated)]
-
-use {sys, Ready, Poll, PollOpt, Token};
-use io::{self, MapNonBlock};
-use event::Evented;
-use poll::SelectorId;
-use std::net::{self, Ipv4Addr, Ipv6Addr, SocketAddr};
-
-/// A User Datagram Protocol socket.
-///
-/// This is an implementation of a bound UDP socket. This supports both IPv4 and
-/// IPv6 addresses, and there is no corresponding notion of a server because UDP
-/// is a datagram protocol.
-#[derive(Debug)]
-pub struct UdpSocket {
-    sys: sys::UdpSocket,
-    selector_id: SelectorId,
-}
-
-impl UdpSocket {
-    /// Creates a UDP socket from the given address.
-    pub fn bind(addr: &SocketAddr) -> io::Result<UdpSocket> {
-        let socket = net::UdpSocket::bind(addr)?;
-        UdpSocket::from_socket(socket)
-    }
-
-    /// Creates a new mio-wrapped socket from an underlying and bound std
-    /// socket.
-    ///
-    /// This function requires that `socket` has previously been bound to an
-    /// address to work correctly, and returns an I/O object which can be used
-    /// with mio to send/receive UDP messages.
-    ///
-    /// This can be used in conjunction with net2's `UdpBuilder` interface to
-    /// configure a socket before it's handed off to mio, such as setting
-    /// options like `reuse_address` or binding to multiple addresses.
-    pub fn from_socket(socket: net::UdpSocket) -> io::Result<UdpSocket> {
-        Ok(UdpSocket {
-            sys: sys::UdpSocket::new(socket)?,
-            selector_id: SelectorId::new(),
-        })
-    }
-
-    /// Returns the socket address that this socket was created from.
-    pub fn local_addr(&self) -> io::Result<SocketAddr> {
-        self.sys.local_addr()
-    }
-
-    /// Creates a new independently owned handle to the underlying socket.
-    ///
-    /// The returned `UdpSocket` is a reference to the same socket that this
-    /// object references. Both handles will read and write the same port, and
-    /// options set on one socket will be propagated to the other.
-    pub fn try_clone(&self) -> io::Result<UdpSocket> {
-        self.sys.try_clone()
-            .map(|s| {
-                UdpSocket {
-                    sys: s,
-                    selector_id: self.selector_id.clone(),
-                }
-            })
-    }
-
-    /// Sends data on the socket to the given address. On success, returns the
-    /// number of bytes written.
-    ///
-    /// Address type can be any implementor of `ToSocketAddrs` trait. See its
-    /// documentation for concrete examples.
-    pub fn send_to(&self, buf: &[u8], target: &SocketAddr)
-                   -> io::Result<Option<usize>> {
-        self.sys.send_to(buf, target).map_non_block()
-    }
-
-    /// Receives data from the socket and stores data in the supplied buffer `buf`. On success,
-    /// returns the number of bytes read and the address from whence the data came.
-    ///
-    /// The function must be called with valid byte array `buf` of sufficient size to
-    /// hold the message bytes. If a message is too long to fit in the supplied buffer,
-    /// excess bytes may be discarded.
-    ///
-    /// The function does not read from `buf`, but is overwriting previous content of `buf`.
-    ///
-    /// Assuming the function has read `n` bytes, slicing `&buf[..n]` provides
-    /// efficient access with iterators and boundary checks.
-    pub fn recv_from(&self, buf: &mut [u8])
-                     -> io::Result<Option<(usize, SocketAddr)>> {
-        self.sys.recv_from(buf).map_non_block()
-    }
-
-    /// Sends data on the socket to the address previously bound via connect(). On success,
-    /// returns the number of bytes written.
-    pub fn send(&self, buf: &[u8])
-                   -> io::Result<Option<usize>> {
-        self.sys.send(buf).map_non_block()
-    }
-
-    /// Receives data from the socket previously bound with connect() and stores data in
-    /// the supplied buffer `buf`. On success, returns the number of bytes read.
-    ///
-    /// The function must be called with valid byte array `buf` of sufficient size to
-    /// hold the message bytes. If a message is too long to fit in the supplied buffer,
-    /// excess bytes may be discarded.
-    ///
-    /// The function does not read from `buf`, but is overwriting previous content of `buf`.
-    ///
-    /// Assuming the function has read `n` bytes, slicing `&buf[..n]` provides
-    /// efficient access with iterators and boundary checks.
-    pub fn recv(&self, buf: &mut [u8])
-                     -> io::Result<Option<usize>> {
-        self.sys.recv(buf).map_non_block()
-    }
-
-    /// Connects the UDP socket setting the default destination for `send()` 
-    /// and limiting packets that are read via `recv` from the address specified
-    /// in `addr`.
-    pub fn connect(&self, addr: SocketAddr)
-                 -> io::Result<()> {
-        self.sys.connect(addr)
-    }
-
-    /// Gets the value of the `SO_BROADCAST` option for this socket.
-    ///
-    /// For more information about this option, see
-    /// [`set_broadcast`][link].
-    ///
-    /// [link]: #method.set_broadcast
-    pub fn broadcast(&self) -> io::Result<bool> {
-        self.sys.broadcast()
-    }
-
-    /// Sets the value of the `SO_BROADCAST` option for this socket.
-    ///
-    /// When enabled, this socket is allowed to send packets to a broadcast
-    /// address.
-    pub fn set_broadcast(&self, on: bool) -> io::Result<()> {
-        self.sys.set_broadcast(on)
-    }
-
-    /// Gets the value of the `IP_MULTICAST_LOOP` option for this socket.
-    ///
-    /// For more information about this option, see
-    /// [`set_multicast_loop_v4`][link].
-    ///
-    /// [link]: #method.set_multicast_loop_v4
-    pub fn multicast_loop_v4(&self) -> io::Result<bool> {
-        self.sys.multicast_loop_v4()
-    }
-
-    /// Sets the value of the `IP_MULTICAST_LOOP` option for this socket.
-    ///
-    /// If enabled, multicast packets will be looped back to the local socket.
-    /// Note that this may not have any affect on IPv6 sockets.
-    pub fn set_multicast_loop_v4(&self, on: bool) -> io::Result<()> {
-        self.sys.set_multicast_loop_v4(on)
-    }
-
-    /// Gets the value of the `IP_MULTICAST_TTL` option for this socket.
-    ///
-    /// For more information about this option, see
-    /// [`set_multicast_ttl_v4`][link].
-    ///
-    /// [link]: #method.set_multicast_ttl_v4
-    pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
-        self.sys.multicast_ttl_v4()
-    }
-
-    /// Sets the value of the `IP_MULTICAST_TTL` option for this socket.
-    ///
-    /// Indicates the time-to-live value of outgoing multicast packets for
-    /// this socket. The default value is 1 which means that multicast packets
-    /// don't leave the local network unless explicitly requested.
-    ///
-    /// Note that this may not have any affect on IPv6 sockets.
-    pub fn set_multicast_ttl_v4(&self, ttl: u32) -> io::Result<()> {
-        self.sys.set_multicast_ttl_v4(ttl)
-    }
-
-    /// Gets the value of the `IPV6_MULTICAST_LOOP` option for this socket.
-    ///
-    /// For more information about this option, see
-    /// [`set_multicast_loop_v6`][link].
-    ///
-    /// [link]: #method.set_multicast_loop_v6
-    pub fn multicast_loop_v6(&self) -> io::Result<bool> {
-        self.sys.multicast_loop_v6()
-    }
-
-    /// Sets the value of the `IPV6_MULTICAST_LOOP` option for this socket.
-    ///
-    /// Controls whether this socket sees the multicast packets it sends itself.
-    /// Note that this may not have any affect on IPv4 sockets.
-    pub fn set_multicast_loop_v6(&self, on: bool) -> io::Result<()> {
-        self.sys.set_multicast_loop_v6(on)
-    }
-
-    /// Gets the value of the `IP_TTL` option for this socket.
-    ///
-    /// For more information about this option, see [`set_ttl`][link].
-    ///
-    /// [link]: #method.set_ttl
-    pub fn ttl(&self) -> io::Result<u32> {
-        self.sys.ttl()
-    }
-
-    /// Sets the value for the `IP_TTL` option on this socket.
-    ///
-    /// This value sets the time-to-live field that is used in every packet sent
-    /// from this socket.
-    pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
-        self.sys.set_ttl(ttl)
-    }
-
-    /// Executes an operation of the `IP_ADD_MEMBERSHIP` type.
-    ///
-    /// This function specifies a new multicast group for this socket to join.
-    /// The address must be a valid multicast address, and `interface` is the
-    /// address of the local interface with which the system should join the
-    /// multicast group. If it's equal to `INADDR_ANY` then an appropriate
-    /// interface is chosen by the system.
-    pub fn join_multicast_v4(&self,
-                             multiaddr: &Ipv4Addr,
-                             interface: &Ipv4Addr) -> io::Result<()> {
-        self.sys.join_multicast_v4(multiaddr, interface)
-    }
-
-    /// Executes an operation of the `IPV6_ADD_MEMBERSHIP` type.
-    ///
-    /// This function specifies a new multicast group for this socket to join.
-    /// The address must be a valid multicast address, and `interface` is the
-    /// index of the interface to join/leave (or 0 to indicate any interface).
-    pub fn join_multicast_v6(&self,
-                             multiaddr: &Ipv6Addr,
-                             interface: u32) -> io::Result<()> {
-        self.sys.join_multicast_v6(multiaddr, interface)
-    }
-
-    /// Executes an operation of the `IP_DROP_MEMBERSHIP` type.
-    ///
-    /// For more information about this option, see
-    /// [`join_multicast_v4`][link].
-    ///
-    /// [link]: #method.join_multicast_v4
-    pub fn leave_multicast_v4(&self,
-                              multiaddr: &Ipv4Addr,
-                              interface: &Ipv4Addr) -> io::Result<()> {
-        self.sys.leave_multicast_v4(multiaddr, interface)
-    }
-
-    /// Executes an operation of the `IPV6_DROP_MEMBERSHIP` type.
-    ///
-    /// For more information about this option, see
-    /// [`join_multicast_v6`][link].
-    ///
-    /// [link]: #method.join_multicast_v6
-    pub fn leave_multicast_v6(&self,
-                              multiaddr: &Ipv6Addr,
-                              interface: u32) -> io::Result<()> {
-        self.sys.leave_multicast_v6(multiaddr, interface)
-    }
-
-    /// Get the value of the `SO_ERROR` option on this socket.
-    ///
-    /// This will retrieve the stored error in the underlying socket, clearing
-    /// the field in the process. This can be useful for checking errors between
-    /// calls.
-    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        self.sys.take_error()
-    }
-}
-
-impl Evented for UdpSocket {
-    fn register(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.selector_id.associate_selector(poll)?;
-        self.sys.register(poll, token, interest, opts)
-    }
-
-    fn reregister(&self, poll: &Poll, token: Token, interest: Ready, opts: PollOpt) -> io::Result<()> {
-        self.sys.reregister(poll, token, interest, opts)
-    }
-
-    fn deregister(&self, poll: &Poll) -> io::Result<()> {
-        self.sys.deregister(poll)
-    }
-}
-
-/*
- *
- * ===== UNIX ext =====
- *
- */
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-use std::os::unix::io::{IntoRawFd, AsRawFd, FromRawFd, RawFd};
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-impl IntoRawFd for UdpSocket {
-    fn into_raw_fd(self) -> RawFd {
-        self.sys.into_raw_fd()
-    }
-}
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-impl AsRawFd for UdpSocket {
-    fn as_raw_fd(&self) -> RawFd {
-        self.sys.as_raw_fd()
-    }
-}
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-impl FromRawFd for UdpSocket {
-    unsafe fn from_raw_fd(fd: RawFd) -> UdpSocket {
-        UdpSocket {
-            sys: FromRawFd::from_raw_fd(fd),
-            selector_id: SelectorId::new(),
-        }
-    }
-}

src/waker.rs

@@ -0,0 +1,93 @@
+use crate::{poll, sys, Registry, Token};
+
+use std::io;
+
+/// Waker allows cross-thread waking of [`Poll`].
+///
+/// When created it will cause events with [`readable`] readiness and the
+/// provided `token` if [`wake`] is called, possibly from another thread.
+///
+/// [`Poll`]: crate::Poll
+/// [`readable`]: crate::event::Event::is_readable
+/// [`wake`]: Waker::wake
+///
+/// # Notes
+///
+/// `Waker` events are only guaranteed to be delivered while the `Waker` value
+/// is alive.
+///
+/// Only a single `Waker` should active per [`Poll`], if multiple threads need
+/// access to the `Waker` it can be shared via for example an `Arc`. What
+/// happens if multiple `Waker`s are registered with the same `Poll` is
+/// undefined.
+///
+/// # Implementation notes
+///
+/// On platforms that support kqueue this will use the `EVFILT_USER` event
+/// filter, see [implementation notes of `Poll`] to see what platforms support
+/// kqueue. On Linux it uses [eventfd].
+///
+/// [implementation notes of `Poll`]: struct.Poll.html#implementation-notes
+/// [eventfd]: http://man7.org/linux/man-pages/man2/eventfd.2.html
+///
+/// # Examples
+///
+/// Wake a [`Poll`] instance from another thread.
+///
+/// ```
+/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
+/// use std::thread;
+/// use std::time::Duration;
+/// use std::sync::Arc;
+///
+/// use mio::{Events, Token, Poll, Waker};
+///
+/// const WAKE_TOKEN: Token = Token(10);
+///
+/// let mut poll = Poll::new()?;
+/// let mut events = Events::with_capacity(2);
+///
+/// let waker = Arc::new(Waker::new(poll.registry(), WAKE_TOKEN)?);
+///
+/// // We need to keep the Waker alive, so we'll create a clone for the
+/// // thread we create below.
+/// let waker1 = waker.clone();
+/// let handle = thread::spawn(move || {
+///     // Working hard, or hardly working?
+///     thread::sleep(Duration::from_millis(500));
+///
+///     // Now we'll wake the queue on the other thread.
+///     waker1.wake().expect("unable to wake");
+/// });
+///
+/// // On our current thread we'll poll for events, without a timeout.
+/// poll.poll(&mut events, None)?;
+///
+/// // After about 500 milliseconds we should we awoken by the other thread we
+/// // started, getting a single event.
+/// assert!(!events.is_empty());
+/// let waker_event = events.iter().next().unwrap();
+/// assert!(waker_event.is_readable());
+/// assert_eq!(waker_event.token(), WAKE_TOKEN);
+/// # handle.join().unwrap();
+/// #     Ok(())
+/// # }
+/// ```
+#[derive(Debug)]
+pub struct Waker {
+    inner: sys::Waker,
+}
+
+impl Waker {
+    /// Create a new `Waker`.
+    pub fn new(registry: &Registry, token: Token) -> io::Result<Waker> {
+        sys::Waker::new(poll::selector(&registry), token).map(|inner| Waker { inner })
+    }
+
+    /// Wake up the [`Poll`] associated with this `Waker`.
+    ///
+    /// [`Poll`]: crate::Poll
+    pub fn wake(&self) -> io::Result<()> {
+        self.inner.wake()
+    }
+}

test/benchmark.rs

@@ -1,80 +0,0 @@
-use std::mem;
-use mio::net::{AddressFamily, Inet, Inet6, SockAddr, InetAddr, IPv4Addr, SocketType, Dgram, Stream};
-use std::io::net::ip::IpAddr;
-use native::NativeTaskBuilder;
-use std::task::TaskBuilder;
-use mio::os::{from_sockaddr};
-use time::Instant;
-use std::vec::*;
-use std::io::timer;
-
-mod nix {
-    pub use nix::c_int;
-    pub use nix::fcntl::{Fd, O_NONBLOCK, O_CLOEXEC};
-    pub use nix::errno::{EWOULDBLOCK, EINPROGRESS};
-    pub use nix::sys::socket::*;
-    pub use nix::unistd::*;
-    pub use nix::sys::epoll::*;
-}
-
-fn timed(label: &str, f: ||) {
-    let start = Instant::now();
-    f();
-    let elapsed = start.elapsed();
-    println!("  {}: {}", label, elapsed.as_secs() as f64 + elapsed.subsec_nanos() as f64 / 1_000_000_000.0);
-}
-
-fn init(saddr: &str) -> (nix::Fd, nix::Fd) {
-    let optval = 1i;
-    let addr = SockAddr::parse(saddr.as_slice()).expect("could not parse InetAddr");
-    let srvfd = nix::socket(nix::AF_INET, nix::SOCK_STREAM, nix::SOCK_CLOEXEC).unwrap();
-    nix::setsockopt(srvfd, nix::SOL_SOCKET, nix::SO_REUSEADDR, &optval).unwrap();
-    nix::bind(srvfd, &from_sockaddr(&addr)).unwrap();
-    nix::listen(srvfd, 256u).unwrap();
-
-    let fd = nix::socket(nix::AF_INET, nix::SOCK_STREAM, nix::SOCK_CLOEXEC | nix::SOCK_NONBLOCK).unwrap();
-    let res = nix::connect(fd, &from_sockaddr(&addr));
-    let start = Instant::now();
-    println!("connecting : {}", res);
-
-    let clifd = nix::accept4(srvfd, nix::SOCK_CLOEXEC | nix::SOCK_NONBLOCK).unwrap();
-    let elapsed = start.elapsed();
-    println!("accepted : {} - {}", clifd, elapsed.as_secs() as f64 + elapsed.subsec_nanos() as f64 / 1_000_000_000.0);
-
-    (clifd, srvfd)
-}
-
-#[test]
-fn read_bench() {
-    let (clifd, srvfd) = init("10.10.1.5:11111");
-    let mut buf = Vec::with_capacity(1600);
-    unsafe { buf.set_len(1600); }
-    timed("read", || {
-        let mut i = 0u;
-        while i < 10000000 {
-            let res = nix::read(clifd, buf.as_mut_slice());
-            assert_eq!(res.unwrap_err().kind, nix::EWOULDBLOCK);
-            i = i + 1;
-        }
-    });
-}
-
-#[test]
-fn epollctl_bench() {
-    let (clifd, srvfd) = init("10.10.1.5:22222");
-
-    let epfd = nix::epoll_create().unwrap();
-    let info = nix::EpollEvent { events: nix::EPOLLIN | nix::EPOLLONESHOT | nix::EPOLLET,
-                                 data: 0u64 };
-
-    nix::epoll_ctl(epfd, nix::EpollCtlAdd, clifd, &info);
-
-    timed("epoll_ctl", || {
-        let mut i = 0u;
-        while i < 10000000 {
-            nix::epoll_ctl(epfd, nix::EpollCtlMod, clifd, &info);
-            i = i + 1;
-        }
-    });
-
-}

test/mod.rs

@@ -1,215 +0,0 @@
-#![allow(deprecated)]
-
-extern crate mio;
-extern crate bytes;
-extern crate net2;
-
-#[macro_use]
-extern crate log;
-extern crate env_logger;
-extern crate iovec;
-extern crate slab;
-extern crate tempdir;
-
-#[cfg(target_os = "fuchsia")]
-extern crate fuchsia_zircon as zircon;
-
-pub use ports::localhost;
-
-mod test_custom_evented;
-mod test_close_on_drop;
-mod test_double_register;
-mod test_echo_server;
-mod test_local_addr_ready;
-mod test_multicast;
-mod test_oneshot;
-mod test_poll;
-mod test_register_deregister;
-mod test_register_multiple_event_loops;
-mod test_reregister_without_poll;
-mod test_smoke;
-mod test_tcp;
-mod test_tcp_level;
-mod test_tcp_shutdown;
-mod test_udp_level;
-mod test_udp_socket;
-mod test_write_then_drop;
-
-#[cfg(feature = "with-deprecated")]
-mod test_notify;
-#[cfg(feature = "with-deprecated")]
-mod test_poll_channel;
-#[cfg(feature = "with-deprecated")]
-mod test_tick;
-
-// The following tests are for deprecated features. Only run these tests on
-// platforms that were supported from before the features were deprecated
-#[cfg(any(target_os = "macos", target_os = "linux", target_os = "windows"))]
-#[cfg(feature = "with-deprecated")]
-mod test_battery;
-
-#[cfg(any(target_os = "macos", target_os = "linux"))]
-#[cfg(feature = "with-deprecated")]
-mod test_unix_echo_server;
-#[cfg(any(target_os = "macos", target_os = "linux"))]
-#[cfg(feature = "with-deprecated")]
-mod test_unix_pass_fd;
-#[cfg(any(target_os = "macos", target_os = "linux"))]
-#[cfg(feature = "with-deprecated")]
-mod test_uds_shutdown;
-#[cfg(any(target_os = "macos", target_os = "linux"))]
-#[cfg(feature = "with-deprecated")]
-mod test_subprocess_pipe;
-#[cfg(any(target_os = "macos", target_os = "linux"))]
-#[cfg(feature = "with-deprecated")]
-mod test_broken_pipe;
-
-#[cfg(any(target_os = "fuchsia"))]
-mod test_fuchsia_handles;
-
-use bytes::{Buf, MutBuf};
-use std::io::{self, Read, Write};
-use std::time::Duration;
-use mio::{Events, Poll};
-use mio::event::Event;
-
-pub trait TryRead {
-    fn try_read_buf<B: MutBuf>(&mut self, buf: &mut B) -> io::Result<Option<usize>>
-        where Self : Sized
-    {
-        // Reads the length of the slice supplied by buf.mut_bytes into the buffer
-        // This is not guaranteed to consume an entire datagram or segment.
-        // If your protocol is msg based (instead of continuous stream) you should
-        // ensure that your buffer is large enough to hold an entire segment (1532 bytes if not jumbo
-        // frames)
-        let res = self.try_read(unsafe { buf.mut_bytes() });
-
-        if let Ok(Some(cnt)) = res {
-            unsafe { buf.advance(cnt); }
-        }
-
-        res
-    }
-
-    fn try_read(&mut self, buf: &mut [u8]) -> io::Result<Option<usize>>;
-}
-
-pub trait TryWrite {
-    fn try_write_buf<B: Buf>(&mut self, buf: &mut B) -> io::Result<Option<usize>>
-        where Self : Sized
-    {
-        let res = self.try_write(buf.bytes());
-
-        if let Ok(Some(cnt)) = res {
-            buf.advance(cnt);
-        }
-
-        res
-    }
-
-    fn try_write(&mut self, buf: &[u8]) -> io::Result<Option<usize>>;
-}
-
-impl<T: Read> TryRead for T {
-    fn try_read(&mut self, dst: &mut [u8]) -> io::Result<Option<usize>> {
-        self.read(dst).map_non_block()
-    }
-}
-
-impl<T: Write> TryWrite for T {
-    fn try_write(&mut self, src: &[u8]) -> io::Result<Option<usize>> {
-        self.write(src).map_non_block()
-    }
-}
-
-/*
- *
- * ===== Helpers =====
- *
- */
-
-/// A helper trait to provide the map_non_block function on Results.
-trait MapNonBlock<T> {
-    /// Maps a `Result<T>` to a `Result<Option<T>>` by converting
-    /// operation-would-block errors into `Ok(None)`.
-    fn map_non_block(self) -> io::Result<Option<T>>;
-}
-
-impl<T> MapNonBlock<T> for io::Result<T> {
-    fn map_non_block(self) -> io::Result<Option<T>> {
-        use std::io::ErrorKind::WouldBlock;
-
-        match self {
-            Ok(value) => Ok(Some(value)),
-            Err(err) => {
-                if let WouldBlock = err.kind() {
-                    Ok(None)
-                } else {
-                    Err(err)
-                }
-            }
-        }
-    }
-}
-
-mod ports {
-    use std::net::SocketAddr;
-    use std::str::FromStr;
-    use std::sync::atomic::{AtomicUsize, ATOMIC_USIZE_INIT};
-    use std::sync::atomic::Ordering::SeqCst;
-
-    // Helper for getting a unique port for the task run
-    // TODO: Reuse ports to not spam the system
-    static mut NEXT_PORT: AtomicUsize = ATOMIC_USIZE_INIT;
-    const FIRST_PORT: usize = 18080;
-
-    fn next_port() -> usize {
-        unsafe {
-            // If the atomic was never used, set it to the initial port
-            NEXT_PORT.compare_and_swap(0, FIRST_PORT, SeqCst);
-
-            // Get and increment the port list
-            NEXT_PORT.fetch_add(1, SeqCst)
-        }
-    }
-
-    pub fn localhost() -> SocketAddr {
-        let s = format!("127.0.0.1:{}", next_port());
-        FromStr::from_str(&s).unwrap()
-    }
-}
-
-pub fn sleep_ms(ms: u64) {
-    use std::thread;
-    use std::time::Duration;
-    thread::sleep(Duration::from_millis(ms));
-}
-
-pub fn expect_events(poll: &Poll,
-                     event_buffer: &mut Events,
-                     poll_try_count: usize,
-                     mut expected: Vec<Event>)
-{
-    const MS: u64 = 1_000;
-
-    for _ in 0..poll_try_count {
-        poll.poll(event_buffer, Some(Duration::from_millis(MS))).unwrap();
-        for event in event_buffer.iter() {
-            let pos_opt = match expected.iter().position(|exp_event| {
-                (event.token() == exp_event.token()) &&
-                event.readiness().contains(exp_event.readiness())
-            }) {
-                Some(x) => Some(x),
-                None => None,
-            };
-            if let Some(pos) = pos_opt { expected.remove(pos); }
-        }
-
-        if expected.is_empty() {
-            break;
-        }
-    }
-
-    assert!(expected.is_empty(), "The following expected events were not found: {:?}", expected);
-}
-

test/test_battery.rs

@@ -1,269 +0,0 @@
-use {localhost, sleep_ms, TryRead, TryWrite};
-use mio::*;
-use mio::deprecated::{EventLoop, EventLoopBuilder, Handler};
-use mio::net::{TcpListener, TcpStream};
-use std::collections::LinkedList;
-use slab::Slab;
-use std::{io, thread};
-use std::time::Duration;
-
-// Don't touch the connection slab
-const SERVER: Token = Token(10_000_000);
-const CLIENT: Token = Token(10_000_001);
-
-#[cfg(windows)]
-const N: usize = 10_000;
-#[cfg(unix)]
-const N: usize = 1_000_000;
-
-struct EchoConn {
-    sock: TcpStream,
-    token: Option<Token>,
-    count: usize,
-    buf: Vec<u8>
-}
-
-impl EchoConn {
-    fn new(sock: TcpStream) -> EchoConn {
-        let mut ec =
-        EchoConn {
-            sock: sock,
-            token: None,
-            buf: Vec::with_capacity(22),
-            count: 0
-        };
-        unsafe { ec.buf.set_len(22) };
-        ec
-    }
-
-    fn writable(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        event_loop.reregister(&self.sock, self.token.unwrap(),
-                              Ready::readable(),
-                              PollOpt::edge() | PollOpt::oneshot())
-    }
-
-    fn readable(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        loop {
-            match self.sock.try_read(&mut self.buf[..]) {
-                Ok(None) => {
-                    break;
-                }
-                Ok(Some(_)) => {
-                    self.count += 1;
-                    if self.count % 10000 == 0 {
-                        info!("Received {} messages", self.count);
-                    }
-                    if self.count == N {
-                        event_loop.shutdown();
-                    }
-                }
-                Err(_) => {
-                    break;
-                }
-
-            };
-        }
-
-        event_loop.reregister(&self.sock, self.token.unwrap(), Ready::readable(), PollOpt::edge() | PollOpt::oneshot())
-    }
-}
-
-struct EchoServer {
-    sock: TcpListener,
-    conns: Slab<EchoConn>
-}
-
-impl EchoServer {
-    fn accept(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        debug!("server accepting socket");
-
-        let sock = self.sock.accept().unwrap().0;
-        let conn = EchoConn::new(sock,);
-        let tok = self.conns.insert(conn);
-
-        // Register the connection
-        self.conns[tok].token = Some(Token(tok));
-        event_loop.register(&self.conns[tok].sock, Token(tok), Ready::readable(),
-                            PollOpt::edge() | PollOpt::oneshot())
-            .expect("could not register socket with event loop");
-
-        Ok(())
-    }
-
-    fn conn_readable(&mut self, event_loop: &mut EventLoop<Echo>,
-                     tok: Token) -> io::Result<()> {
-        debug!("server conn readable; tok={:?}", tok);
-        self.conn(tok).readable(event_loop)
-    }
-
-    fn conn_writable(&mut self, event_loop: &mut EventLoop<Echo>,
-                     tok: Token) -> io::Result<()> {
-        debug!("server conn writable; tok={:?}", tok);
-        self.conn(tok).writable(event_loop)
-    }
-
-    fn conn<'a>(&'a mut self, tok: Token) -> &'a mut EchoConn {
-        &mut self.conns[tok.into()]
-    }
-}
-
-struct EchoClient {
-    sock: TcpStream,
-    backlog: LinkedList<String>,
-    token: Token,
-    count: u32
-}
-
-
-// Sends a message and expects to receive the same exact message, one at a time
-impl EchoClient {
-    fn new(sock: TcpStream, tok: Token) -> EchoClient {
-
-        EchoClient {
-            sock: sock,
-            backlog: LinkedList::new(),
-            token: tok,
-            count: 0
-        }
-    }
-
-    fn readable(&mut self, _event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        Ok(())
-    }
-
-    fn writable(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        debug!("client socket writable");
-
-        while self.backlog.len() > 0 {
-            match self.sock.try_write(self.backlog.front().unwrap().as_bytes()) {
-                Ok(None) => {
-                    break;
-                }
-                Ok(Some(_)) => {
-                    self.backlog.pop_front();
-                    self.count += 1;
-                    if self.count % 10000 == 0 {
-                        info!("Sent {} messages", self.count);
-                    }
-                }
-                Err(e) => { debug!("not implemented; client err={:?}", e); break; }
-            }
-        }
-        if self.backlog.len() > 0 {
-            event_loop.reregister(&self.sock, self.token, Ready::writable(),
-                                  PollOpt::edge() | PollOpt::oneshot()).unwrap();
-        }
-
-        Ok(())
-    }
-}
-
-struct Echo {
-    server: EchoServer,
-    client: EchoClient,
-}
-
-impl Echo {
-    fn new(srv: TcpListener, client: TcpStream) -> Echo {
-        Echo {
-            server: EchoServer {
-                sock: srv,
-                conns: Slab::with_capacity(128),
-            },
-            client: EchoClient::new(client, CLIENT),
-        }
-    }
-}
-
-impl Handler for Echo {
-    type Timeout = usize;
-    type Message = String;
-
-    fn ready(&mut self, event_loop: &mut EventLoop<Echo>, token: Token,
-             events: Ready) {
-
-        if events.is_readable() {
-            match token {
-                SERVER => self.server.accept(event_loop).unwrap(),
-                CLIENT => self.client.readable(event_loop).unwrap(),
-                i => self.server.conn_readable(event_loop, i).unwrap()
-            }
-        }
-        if events.is_writable() {
-            match token {
-                SERVER => panic!("received writable for token 0"),
-                CLIENT => self.client.writable(event_loop).unwrap(),
-                _ => self.server.conn_writable(event_loop, token).unwrap()
-            }
-        }
-    }
-
-    fn notify(&mut self, event_loop: &mut EventLoop<Echo>, msg: String) {
-        match self.client.sock.try_write(msg.as_bytes()) {
-            Ok(Some(n)) => {
-                self.client.count += 1;
-                if self.client.count % 10000 == 0 {
-                    info!("Sent {} bytes:   count {}", n, self.client.count);
-                }
-            },
-
-            _ => {
-                self.client.backlog.push_back(msg);
-                event_loop.reregister(
-                    &self.client.sock,
-                    self.client.token,
-                    Ready::writable(),
-                    PollOpt::edge() | PollOpt::oneshot()).unwrap();
-            }
-        }
-    }
-}
-
-#[test]
-pub fn test_echo_server() {
-    debug!("Starting TEST_ECHO_SERVER");
-    let mut b = EventLoopBuilder::new();
-    b.notify_capacity(1_048_576)
-        .messages_per_tick(64)
-        .timer_tick(Duration::from_millis(100))
-        .timer_wheel_size(1_024)
-        .timer_capacity(65_536);
-
-    let mut event_loop = b.build().unwrap();
-
-    let addr = localhost();
-
-    let srv = TcpListener::bind(&addr).unwrap();
-
-    info!("listen for connections");
-    event_loop.register(&srv, SERVER, Ready::readable(),
-                        PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    let sock = TcpStream::connect(&addr).unwrap();
-
-    // Connect to the server
-    event_loop.register(&sock, CLIENT, Ready::writable(),
-                        PollOpt::edge() | PollOpt::oneshot()).unwrap();
-    let chan = event_loop.channel();
-
-    let go = move || {
-        let mut i = N;
-
-        sleep_ms(1_000);
-
-        let message = "THIS IS A TEST MESSAGE".to_string();
-        while i > 0 {
-            chan.send(message.clone()).unwrap();
-            i -= 1;
-            if i % 10000 == 0 {
-                info!("Enqueued {} messages", N - i);
-            }
-        }
-    };
-
-    let t = thread::spawn(go);
-
-    // Start the event loop
-    event_loop.run(&mut Echo::new(srv, sock)).unwrap();
-    t.join().unwrap();
-}

test/test_broken_pipe.rs

@@ -1,28 +0,0 @@
-use mio::{Token, Ready, PollOpt};
-use mio::deprecated::{unix, EventLoop, Handler};
-use std::time::Duration;
-
-pub struct BrokenPipeHandler;
-
-impl Handler for BrokenPipeHandler {
-    type Timeout = ();
-    type Message = ();
-    fn ready(&mut self, _: &mut EventLoop<Self>, token: Token, _: Ready) {
-        if token == Token(1) {
-            panic!("Received ready() on a closed pipe.");
-        }
-    }
-}
-
-#[test]
-pub fn broken_pipe() {
-    let mut event_loop: EventLoop<BrokenPipeHandler> = EventLoop::new().unwrap();
-    let (reader, _) = unix::pipe().unwrap();
-
-    event_loop.register(&reader, Token(1), Ready::all(), PollOpt::edge())
-              .unwrap();
-
-    let mut handler = BrokenPipeHandler;
-    drop(reader);
-    event_loop.run_once(&mut handler, Some(Duration::from_millis(1000))).unwrap();
-}

test/test_custom_evented.rs

@@ -1,394 +0,0 @@
-use mio::{Events, Poll, PollOpt, Ready, Registration, SetReadiness, Token};
-use mio::event::Evented;
-use std::time::Duration;
-
-#[test]
-fn smoke() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(128);
-
-    let (r, set) = Registration::new2();
-    r.register(&poll, Token(0), Ready::readable(), PollOpt::edge()).unwrap();
-
-    let n = poll.poll(&mut events, Some(Duration::from_millis(0))).unwrap();
-    assert_eq!(n, 0);
-
-    set.set_readiness(Ready::readable()).unwrap();
-
-    let n = poll.poll(&mut events, Some(Duration::from_millis(0))).unwrap();
-    assert_eq!(n, 1);
-
-    assert_eq!(events.get(0).unwrap().token(), Token(0));
-}
-
-#[test]
-fn set_readiness_before_register() {
-    use std::sync::{Arc, Barrier};
-    use std::thread;
-
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(128);
-
-    for _ in 0..5_000 {
-        let (r, set) = Registration::new2();
-
-        let b1 = Arc::new(Barrier::new(2));
-        let b2 = b1.clone();
-
-        let th = thread::spawn(move || {
-            // set readiness before register
-            set.set_readiness(Ready::readable()).unwrap();
-
-            // run into barrier so both can pass
-            b2.wait();
-        });
-
-        // wait for readiness
-        b1.wait();
-
-        // now register
-        poll.register(&r, Token(123), Ready::readable(), PollOpt::edge()).unwrap();
-
-        loop {
-            let n = poll.poll(&mut events, None).unwrap();
-
-            if n == 0 {
-                continue;
-            }
-
-            assert_eq!(n, 1);
-            assert_eq!(events.get(0).unwrap().token(), Token(123));
-            break;
-        }
-
-        th.join().unwrap();
-    }
-}
-
-#[cfg(any(target_os = "linux", target_os = "macos", target_os = "windows"))]
-mod stress {
-    use mio::{Events, Poll, PollOpt, Ready, Registration, SetReadiness, Token};
-    use mio::event::Evented;
-    use std::time::Duration;
-
-    #[test]
-    fn single_threaded_poll() {
-        use std::sync::Arc;
-        use std::sync::atomic::AtomicUsize;
-        use std::sync::atomic::Ordering::{Acquire, Release};
-        use std::thread;
-
-        const NUM_ATTEMPTS: usize = 30;
-        const NUM_ITERS: usize = 500;
-        const NUM_THREADS: usize = 4;
-        const NUM_REGISTRATIONS: usize = 128;
-
-        for _ in 0..NUM_ATTEMPTS {
-            let poll = Poll::new().unwrap();
-            let mut events = Events::with_capacity(NUM_REGISTRATIONS);
-
-            let registrations: Vec<_> = (0..NUM_REGISTRATIONS).map(|i| {
-                let (r, s) = Registration::new2();
-                r.register(&poll, Token(i), Ready::readable(), PollOpt::edge()).unwrap();
-                (r, s)
-            }).collect();
-
-            let mut ready: Vec<_> = (0..NUM_REGISTRATIONS).map(|_| Ready::empty()).collect();
-
-            let remaining = Arc::new(AtomicUsize::new(NUM_THREADS));
-
-            for _ in 0..NUM_THREADS {
-                let remaining = remaining.clone();
-
-                let set_readiness: Vec<SetReadiness> =
-                    registrations.iter().map(|r| r.1.clone()).collect();
-
-                thread::spawn(move || {
-                    for _ in 0..NUM_ITERS {
-                        for i in 0..NUM_REGISTRATIONS {
-                            set_readiness[i].set_readiness(Ready::readable()).unwrap();
-                            set_readiness[i].set_readiness(Ready::empty()).unwrap();
-                            set_readiness[i].set_readiness(Ready::writable()).unwrap();
-                            set_readiness[i].set_readiness(Ready::readable() | Ready::writable()).unwrap();
-                            set_readiness[i].set_readiness(Ready::empty()).unwrap();
-                        }
-                    }
-
-                    for i in 0..NUM_REGISTRATIONS {
-                        set_readiness[i].set_readiness(Ready::readable()).unwrap();
-                    }
-
-                    remaining.fetch_sub(1, Release);
-                });
-            }
-
-            while remaining.load(Acquire) > 0 {
-                // Set interest
-                for (i, &(ref r, _)) in registrations.iter().enumerate() {
-                    r.reregister(&poll, Token(i), Ready::writable(), PollOpt::edge()).unwrap();
-                }
-
-                poll.poll(&mut events, Some(Duration::from_millis(0))).unwrap();
-
-                for event in &events {
-                    ready[event.token().0] = event.readiness();
-                }
-
-                // Update registration
-                // Set interest
-                for (i, &(ref r, _)) in registrations.iter().enumerate() {
-                    r.reregister(&poll, Token(i), Ready::readable(), PollOpt::edge()).unwrap();
-                }
-            }
-
-            // Finall polls, repeat until readiness-queue empty
-            loop {
-                // Might not read all events from custom-event-queue at once, implementation dependend
-                poll.poll(&mut events, Some(Duration::from_millis(0))).unwrap();
-                if events.is_empty() {
-                    // no more events in readiness queue pending
-                    break;
-                }
-                for event in &events {
-                    ready[event.token().0] = event.readiness();
-                }
-            }
-
-            // Everything should be flagged as readable
-            for ready in ready {
-                assert_eq!(ready, Ready::readable());
-            }
-        }
-    }
-
-    #[test]
-    fn multi_threaded_poll() {
-        use std::sync::{Arc, Barrier};
-        use std::sync::atomic::{AtomicUsize};
-        use std::sync::atomic::Ordering::{Relaxed, SeqCst};
-        use std::thread;
-
-        const ENTRIES: usize = 10_000;
-        const PER_ENTRY: usize = 16;
-        const THREADS: usize = 4;
-        const NUM: usize = ENTRIES * PER_ENTRY;
-
-        struct Entry {
-            #[allow(dead_code)]
-            registration: Registration,
-            set_readiness: SetReadiness,
-            num: AtomicUsize,
-        }
-
-        impl Entry {
-            fn fire(&self) {
-                self.set_readiness.set_readiness(Ready::readable()).unwrap();
-            }
-        }
-
-        let poll = Arc::new(Poll::new().unwrap());
-        let mut entries = vec![];
-
-        // Create entries
-        for i in 0..ENTRIES {
-            let (registration, set_readiness) = Registration::new2();
-            registration.register(&poll, Token(i), Ready::readable(), PollOpt::edge()).unwrap();
-
-            entries.push(Entry {
-                registration,
-                set_readiness,
-                num: AtomicUsize::new(0),
-            });
-        }
-
-        let total = Arc::new(AtomicUsize::new(0));
-        let entries = Arc::new(entries);
-        let barrier = Arc::new(Barrier::new(THREADS));
-
-        let mut threads = vec![];
-
-        for th in 0..THREADS {
-            let poll = poll.clone();
-            let total = total.clone();
-            let entries = entries.clone();
-            let barrier = barrier.clone();
-
-            threads.push(thread::spawn(move || {
-                let mut events = Events::with_capacity(128);
-
-                barrier.wait();
-
-                // Prime all the registrations
-                let mut i = th;
-                while i < ENTRIES {
-                    entries[i].fire();
-                    i += THREADS;
-                }
-
-                let mut n = 0;
-
-
-                while total.load(SeqCst) < NUM {
-                    // A poll timeout is necessary here because there may be more
-                    // than one threads blocked in `poll` when the final wakeup
-                    // notification arrives (and only notifies one thread).
-                    n += poll.poll(&mut events, Some(Duration::from_millis(100))).unwrap();
-
-                    let mut num_this_tick = 0;
-
-                    for event in &events {
-                        let e = &entries[event.token().0];
-
-                        let mut num = e.num.load(Relaxed);
-
-                        loop {
-                            if num < PER_ENTRY {
-                                let actual = e.num.compare_and_swap(num, num + 1, Relaxed);
-
-                                if actual == num {
-                                    num_this_tick += 1;
-                                    e.fire();
-                                    break;
-                                }
-
-                                num = actual;
-                            } else {
-                                break;
-                            }
-                        }
-                    }
-
-                    total.fetch_add(num_this_tick, SeqCst);
-                }
-
-                n
-            }));
-        }
-
-        let _: Vec<_> = threads.into_iter()
-            .map(|th| th.join().unwrap())
-            .collect();
-
-        for entry in entries.iter() {
-            assert_eq!(PER_ENTRY, entry.num.load(Relaxed));
-        }
-    }
-
-    #[test]
-    fn with_small_events_collection() {
-        const N: usize = 8;
-        const ITER: usize = 1_000;
-
-        use std::sync::{Arc, Barrier};
-        use std::sync::atomic::AtomicBool;
-        use std::sync::atomic::Ordering::{Acquire, Release};
-        use std::thread;
-
-        let poll = Poll::new().unwrap();
-        let mut registrations = vec![];
-
-        let barrier = Arc::new(Barrier::new(N + 1));
-        let done = Arc::new(AtomicBool::new(false));
-
-        for i in 0..N {
-            let (registration, set_readiness) = Registration::new2();
-            poll.register(&registration, Token(i), Ready::readable(), PollOpt::edge()).unwrap();
-
-            registrations.push(registration);
-
-            let barrier = barrier.clone();
-            let done = done.clone();
-
-            thread::spawn(move || {
-                barrier.wait();
-
-                while !done.load(Acquire) {
-                    set_readiness.set_readiness(Ready::readable()).unwrap();
-                }
-
-                // Set one last time
-                set_readiness.set_readiness(Ready::readable()).unwrap();
-            });
-        }
-
-        let mut events = Events::with_capacity(4);
-
-        barrier.wait();
-
-        for _ in 0..ITER {
-            poll.poll(&mut events, None).unwrap();
-        }
-
-        done.store(true, Release);
-
-        let mut final_ready = vec![false; N];
-
-
-        for _ in 0..5 {
-            poll.poll(&mut events, None).unwrap();
-
-            for event in &events {
-                final_ready[event.token().0] = true;
-            }
-
-            if final_ready.iter().all(|v| *v) {
-                return;
-            }
-
-            thread::sleep(Duration::from_millis(10));
-        }
-
-        panic!("dead lock?");
-    }
-}
-
-#[test]
-fn drop_registration_from_non_main_thread() {
-    use std::thread;
-    use std::sync::mpsc::channel;
-
-    const THREADS: usize = 8;
-    const ITERS: usize = 50_000;
-
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-    let mut senders = Vec::with_capacity(THREADS);
-    let mut token_index = 0;
-
-    // spawn threads, which will send messages to single receiver
-    for _ in 0..THREADS {
-        let (tx, rx) = channel::<(Registration, SetReadiness)>();
-        senders.push(tx);
-
-        thread::spawn(move || {
-            for (registration, set_readiness) in rx {
-                let _ = set_readiness.set_readiness(Ready::readable());
-                drop(registration);
-                drop(set_readiness);
-            }
-        });
-    }
-
-    let mut index: usize = 0;
-    for _ in 0..ITERS {
-        let (registration, set_readiness) = Registration::new2();
-        registration.register(&poll, Token(token_index), Ready::readable(), PollOpt::edge()).unwrap();
-        let _ = senders[index].send((registration, set_readiness));
-
-        token_index += 1;
-        index += 1;
-        if index == THREADS {
-            index = 0;
-
-            let (registration, set_readiness) = Registration::new2();
-            registration.register(&poll, Token(token_index), Ready::readable(), PollOpt::edge()).unwrap();
-            let _ = set_readiness.set_readiness(Ready::readable());
-            drop(registration);
-            drop(set_readiness);
-            token_index += 1;
-
-            thread::park_timeout(Duration::from_millis(0));
-            let _ = poll.poll(&mut events, None).unwrap();
-        }
-    }
-}

test/test_double_register.rs

@@ -1,17 +0,0 @@
-//! A smoke test for windows compatibility
-
-#[test]
-#[cfg(any(target_os = "linux", target_os = "windows"))]
-pub fn test_double_register() {
-    use mio::*;
-    use mio::net::TcpListener;
-
-    let poll = Poll::new().unwrap();
-
-    // Create the listener
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-
-    // Register the listener with `Poll`
-    poll.register(&l, Token(0), Ready::readable(), PollOpt::edge()).unwrap();
-    assert!(poll.register(&l, Token(1), Ready::readable(), PollOpt::edge()).is_err());
-}

test/test_echo_server.rs

@@ -1,303 +0,0 @@
-use {localhost, TryRead, TryWrite};
-use mio::{Events, Poll, PollOpt, Ready, Token};
-use mio::net::{TcpListener, TcpStream};
-use bytes::{Buf, ByteBuf, MutByteBuf, SliceBuf};
-use slab::Slab;
-use std::io;
-
-const SERVER: Token = Token(10_000_000);
-const CLIENT: Token = Token(10_000_001);
-
-struct EchoConn {
-    sock: TcpStream,
-    buf: Option<ByteBuf>,
-    mut_buf: Option<MutByteBuf>,
-    token: Option<Token>,
-    interest: Ready
-}
-
-impl EchoConn {
-    fn new(sock: TcpStream) -> EchoConn {
-        EchoConn {
-            sock,
-            buf: None,
-            mut_buf: Some(ByteBuf::mut_with_capacity(2048)),
-            token: None,
-            interest: Ready::empty(),
-        }
-    }
-
-    fn writable(&mut self, poll: &mut Poll) -> io::Result<()> {
-        let mut buf = self.buf.take().unwrap();
-
-        match self.sock.try_write_buf(&mut buf) {
-            Ok(None) => {
-                debug!("client flushing buf; WOULDBLOCK");
-
-                self.buf = Some(buf);
-                self.interest.insert(Ready::writable());
-            }
-            Ok(Some(r)) => {
-                debug!("CONN : we wrote {} bytes!", r);
-
-                self.mut_buf = Some(buf.flip());
-
-                self.interest.insert(Ready::readable());
-                self.interest.remove(Ready::writable());
-            }
-            Err(e) => debug!("not implemented; client err={:?}", e),
-        }
-
-        assert!(self.interest.is_readable() || self.interest.is_writable(), "actual={:?}", self.interest);
-        poll.reregister(&self.sock, self.token.unwrap(), self.interest,
-                              PollOpt::edge() | PollOpt::oneshot())
-    }
-
-    fn readable(&mut self, poll: &mut Poll) -> io::Result<()> {
-        let mut buf = self.mut_buf.take().unwrap();
-
-        match self.sock.try_read_buf(&mut buf) {
-            Ok(None) => {
-                debug!("CONN : spurious read wakeup");
-                self.mut_buf = Some(buf);
-            }
-            Ok(Some(r)) => {
-                debug!("CONN : we read {} bytes!", r);
-
-                // prepare to provide this to writable
-                self.buf = Some(buf.flip());
-
-                self.interest.remove(Ready::readable());
-                self.interest.insert(Ready::writable());
-            }
-            Err(e) => {
-                debug!("not implemented; client err={:?}", e);
-                self.interest.remove(Ready::readable());
-            }
-
-        };
-
-        assert!(self.interest.is_readable() || self.interest.is_writable(), "actual={:?}", self.interest);
-        poll.reregister(&self.sock, self.token.unwrap(), self.interest,
-                              PollOpt::edge())
-    }
-}
-
-struct EchoServer {
-    sock: TcpListener,
-    conns: Slab<EchoConn>
-}
-
-impl EchoServer {
-    fn accept(&mut self, poll: &mut Poll) -> io::Result<()> {
-        debug!("server accepting socket");
-
-        let sock = self.sock.accept().unwrap().0;
-        let conn = EchoConn::new(sock,);
-        let tok = self.conns.insert(conn);
-
-        // Register the connection
-        self.conns[tok].token = Some(Token(tok));
-        poll.register(&self.conns[tok].sock, Token(tok), Ready::readable(),
-                                PollOpt::edge() | PollOpt::oneshot())
-            .expect("could not register socket with event loop");
-
-        Ok(())
-    }
-
-    fn conn_readable(&mut self, poll: &mut Poll,
-                     tok: Token) -> io::Result<()> {
-        debug!("server conn readable; tok={:?}", tok);
-        self.conn(tok).readable(poll)
-    }
-
-    fn conn_writable(&mut self, poll: &mut Poll,
-                     tok: Token) -> io::Result<()> {
-        debug!("server conn writable; tok={:?}", tok);
-        self.conn(tok).writable(poll)
-    }
-
-    fn conn(&mut self, tok: Token) -> &mut EchoConn {
-        &mut self.conns[tok.into()]
-    }
-}
-
-struct EchoClient {
-    sock: TcpStream,
-    msgs: Vec<&'static str>,
-    tx: SliceBuf<'static>,
-    rx: SliceBuf<'static>,
-    mut_buf: Option<MutByteBuf>,
-    token: Token,
-    interest: Ready,
-    shutdown: bool,
-}
-
-
-// Sends a message and expects to receive the same exact message, one at a time
-impl EchoClient {
-    fn new(sock: TcpStream, token: Token,  mut msgs: Vec<&'static str>) -> EchoClient {
-        let curr = msgs.remove(0);
-
-        EchoClient {
-            sock,
-            msgs,
-            tx: SliceBuf::wrap(curr.as_bytes()),
-            rx: SliceBuf::wrap(curr.as_bytes()),
-            mut_buf: Some(ByteBuf::mut_with_capacity(2048)),
-            token,
-            interest: Ready::empty(),
-            shutdown: false,
-        }
-    }
-
-    fn readable(&mut self, poll: &mut Poll) -> io::Result<()> {
-        debug!("client socket readable");
-
-        let mut buf = self.mut_buf.take().unwrap();
-
-        match self.sock.try_read_buf(&mut buf) {
-            Ok(None) => {
-                debug!("CLIENT : spurious read wakeup");
-                self.mut_buf = Some(buf);
-            }
-            Ok(Some(r)) => {
-                debug!("CLIENT : We read {} bytes!", r);
-
-                // prepare for reading
-                let mut buf = buf.flip();
-
-                while buf.has_remaining() {
-                    let actual = buf.read_byte().unwrap();
-                    let expect = self.rx.read_byte().unwrap();
-
-                    assert!(actual == expect, "actual={}; expect={}", actual, expect);
-                }
-
-                self.mut_buf = Some(buf.flip());
-
-                self.interest.remove(Ready::readable());
-
-                if !self.rx.has_remaining() {
-                    self.next_msg(poll).unwrap();
-                }
-            }
-            Err(e) => {
-                panic!("not implemented; client err={:?}", e);
-            }
-        };
-
-        if !self.interest.is_empty() {
-            assert!(self.interest.is_readable() || self.interest.is_writable(), "actual={:?}", self.interest);
-            poll.reregister(&self.sock, self.token, self.interest,
-                                       PollOpt::edge() | PollOpt::oneshot())?;
-        }
-
-        Ok(())
-    }
-
-    fn writable(&mut self, poll: &mut Poll) -> io::Result<()> {
-        debug!("client socket writable");
-
-        match self.sock.try_write_buf(&mut self.tx) {
-            Ok(None) => {
-                debug!("client flushing buf; WOULDBLOCK");
-                self.interest.insert(Ready::writable());
-            }
-            Ok(Some(r)) => {
-                debug!("CLIENT : we wrote {} bytes!", r);
-                self.interest.insert(Ready::readable());
-                self.interest.remove(Ready::writable());
-            }
-            Err(e) => debug!("not implemented; client err={:?}", e)
-        }
-
-        if self.interest.is_readable() || self.interest.is_writable() {
-            try!(poll.reregister(&self.sock, self.token, self.interest,
-                                  PollOpt::edge() | PollOpt::oneshot()));
-        }
-
-        Ok(())
-    }
-
-    fn next_msg(&mut self, poll: &mut Poll) -> io::Result<()> {
-        if self.msgs.is_empty() {
-            self.shutdown = true;
-            return Ok(());
-        }
-
-        let curr = self.msgs.remove(0);
-
-        debug!("client prepping next message");
-        self.tx = SliceBuf::wrap(curr.as_bytes());
-        self.rx = SliceBuf::wrap(curr.as_bytes());
-
-        self.interest.insert(Ready::writable());
-        poll.reregister(&self.sock, self.token, self.interest,
-                              PollOpt::edge() | PollOpt::oneshot())
-    }
-}
-
-struct Echo {
-    server: EchoServer,
-    client: EchoClient,
-}
-
-impl Echo {
-    fn new(srv: TcpListener, client: TcpStream, msgs: Vec<&'static str>) -> Echo {
-        Echo {
-            server: EchoServer {
-                sock: srv,
-                conns: Slab::with_capacity(128)
-            },
-            client: EchoClient::new(client, CLIENT, msgs)
-        }
-    }
-}
-
-#[test]
-pub fn test_echo_server() {
-    debug!("Starting TEST_ECHO_SERVER");
-    let mut poll = Poll::new().unwrap();
-
-    let addr = localhost();
-    let srv = TcpListener::bind(&addr).unwrap();
-
-    info!("listen for connections");
-    poll.register(&srv, SERVER, Ready::readable(),
-                            PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    let sock = TcpStream::connect(&addr).unwrap();
-
-    // Connect to the server
-    poll.register(&sock, CLIENT, Ready::writable(),
-                        PollOpt::edge() | PollOpt::oneshot()).unwrap();
-    // == Create storage for events
-    let mut events = Events::with_capacity(1024);
-
-    let mut handler = Echo::new(srv, sock, vec!["foo", "bar"]);
-
-    // Start the event loop
-    while !handler.client.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            debug!("ready {:?} {:?}", event.token(), event.readiness());
-            if event.readiness().is_readable() {
-                match event.token() {
-                    SERVER => handler.server.accept(&mut poll).unwrap(),
-                    CLIENT => handler.client.readable(&mut poll).unwrap(),
-                    i => handler.server.conn_readable(&mut poll, i).unwrap()
-                }
-            }
-
-            if event.readiness().is_writable() {
-                match event.token() {
-                    SERVER => panic!("received writable for token 0"),
-                    CLIENT => handler.client.writable(&mut poll).unwrap(),
-                    i => handler.server.conn_writable(&mut poll, i).unwrap()
-                };
-            }
-        }
-    }
-}

test/test_fuchsia_handles.rs

@@ -1,30 +0,0 @@
-use mio::*;
-use mio::fuchsia::EventedHandle;
-use zircon::{self, AsHandleRef};
-use std::time::Duration;
-
-const MS: u64 = 1_000;
-
-#[test]
-pub fn test_fuchsia_channel() {
-    let poll = Poll::new().unwrap();
-    let mut event_buffer = Events::with_capacity(1);
-    let event_buffer = &mut event_buffer;
-
-    let (channel0, channel1) = zircon::Channel::create(zircon::ChannelOpts::Normal).unwrap();
-    let channel1_evented = unsafe { EventedHandle::new(channel1.raw_handle()) };
-
-    poll.register(&channel1_evented, Token(1), Ready::readable(), PollOpt::edge()).unwrap();
-
-    poll.poll(event_buffer, Some(Duration::from_millis(MS))).unwrap();
-    assert_eq!(event_buffer.len(), 0);
-
-    channel0.write(&[1, 2, 3], &mut vec![], 0).unwrap();
-
-    poll.poll(event_buffer, Some(Duration::from_millis(MS))).unwrap();
-    let event = event_buffer.get(0).unwrap();
-    assert_eq!(event.token(), Token(1));
-    assert!(event.readiness().is_readable());
-
-    poll.deregister(&channel1_evented).unwrap();
-}

test/test_local_addr_ready.rs

@@ -1,67 +0,0 @@
-use {TryWrite};
-use mio::{Events, Poll, PollOpt, Ready, Token};
-use mio::net::{TcpListener, TcpStream};
-
-const LISTEN: Token = Token(0);
-const CLIENT: Token = Token(1);
-const SERVER: Token = Token(2);
-
-struct MyHandler {
-    listener: TcpListener,
-    connected: TcpStream,
-    accepted: Option<TcpStream>,
-    shutdown: bool,
-}
-
-#[test]
-fn local_addr_ready() {
-    let addr = "127.0.0.1:0".parse().unwrap();
-    let server = TcpListener::bind(&addr).unwrap();
-    let addr = server.local_addr().unwrap();
-
-    let poll = Poll::new().unwrap();
-    poll.register(&server, LISTEN, Ready::readable(),
-                        PollOpt::edge()).unwrap();
-
-    let sock = TcpStream::connect(&addr).unwrap();
-    poll.register(&sock, CLIENT, Ready::readable(),
-                        PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(1024);
-
-    let mut handler = MyHandler {
-        listener: server,
-        connected: sock,
-        accepted: None,
-        shutdown: false,
-    };
-
-    while !handler.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            match event.token() {
-                LISTEN => {
-                    let sock = handler.listener.accept().unwrap().0;
-                    poll.register(&sock,
-                                  SERVER,
-                                  Ready::writable(),
-                                  PollOpt::edge()).unwrap();
-                    handler.accepted = Some(sock);
-                }
-                SERVER => {
-                    handler.accepted.as_ref().unwrap().peer_addr().unwrap();
-                    handler.accepted.as_ref().unwrap().local_addr().unwrap();
-                    handler.accepted.as_mut().unwrap().try_write(&[1, 2, 3]).unwrap();
-                    handler.accepted = None;
-                }
-                CLIENT => {
-                    handler.connected.peer_addr().unwrap();
-                    handler.connected.local_addr().unwrap();
-                    handler.shutdown = true;
-                }
-                _ => panic!("unexpected token"),
-            }
-        }
-    }
-}

test/test_multicast.rs

@@ -1,107 +0,0 @@
-// TODO: This doesn't pass on android 64bit CI...
-// Figure out why!
-#![cfg(not(target_os = "android"))]
-
-use mio::{Events, Poll, PollOpt, Ready, Token};
-use mio::net::UdpSocket;
-use bytes::{Buf, MutBuf, RingBuf, SliceBuf};
-use std::str;
-use std::net::IpAddr;
-use localhost;
-
-const LISTENER: Token = Token(0);
-const SENDER: Token = Token(1);
-
-pub struct UdpHandler {
-    tx: UdpSocket,
-    rx: UdpSocket,
-    msg: &'static str,
-    buf: SliceBuf<'static>,
-    rx_buf: RingBuf,
-    localhost: IpAddr,
-    shutdown: bool,
-}
-
-impl UdpHandler {
-    fn new(tx: UdpSocket, rx: UdpSocket, msg: &'static str) -> UdpHandler {
-        let sock = UdpSocket::bind(&"127.0.0.1:12345".parse().unwrap()).unwrap();
-        UdpHandler {
-            tx,
-            rx,
-            msg,
-            buf: SliceBuf::wrap(msg.as_bytes()),
-            rx_buf: RingBuf::new(1024),
-            localhost: sock.local_addr().unwrap().ip(),
-            shutdown: false,
-        }
-    }
-
-    fn handle_read(&mut self, _: &mut Poll, token: Token, _: Ready) {
-        if let LISTENER = token {
-            debug!("We are receiving a datagram now...");
-            match unsafe { self.rx.recv_from(self.rx_buf.mut_bytes()) } {
-                Ok((cnt, addr)) => {
-                    unsafe { MutBuf::advance(&mut self.rx_buf, cnt); }
-                    assert_eq!(addr.ip(), self.localhost);
-                }
-                res => panic!("unexpected result: {:?}", res),
-            }
-            assert!(str::from_utf8(self.rx_buf.bytes()).unwrap() == self.msg);
-            self.shutdown = true;
-        }
-    }
-
-    fn handle_write(&mut self, _: &mut Poll, token: Token, _: Ready) {
-        if let SENDER = token {
-            let addr = self.rx.local_addr().unwrap();
-            let cnt = self.tx.send_to(self.buf.bytes(), &addr).unwrap();
-            self.buf.advance(cnt);
-        }
-    }
-}
-
-#[test]
-pub fn test_multicast() {
-    drop(::env_logger::init());
-    debug!("Starting TEST_UDP_CONNECTIONLESS");
-    let mut poll = Poll::new().unwrap();
-
-    let addr = localhost();
-    let any = "0.0.0.0:0".parse().unwrap();
-
-    let tx = UdpSocket::bind(&any).unwrap();
-    let rx = UdpSocket::bind(&addr).unwrap();
-
-    info!("Joining group 227.1.1.100");
-    let any = "0.0.0.0".parse().unwrap();
-    rx.join_multicast_v4(&"227.1.1.100".parse().unwrap(), &any).unwrap();
-
-    info!("Joining group 227.1.1.101");
-    rx.join_multicast_v4(&"227.1.1.101".parse().unwrap(), &any).unwrap();
-
-    info!("Registering SENDER");
-    poll.register(&tx, SENDER, Ready::writable(), PollOpt::edge()).unwrap();
-
-    info!("Registering LISTENER");
-    poll.register(&rx, LISTENER, Ready::readable(), PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(1024);
-
-    let mut handler = UdpHandler::new(tx, rx, "hello world");
-
-    info!("Starting event loop to test with...");
-
-    while !handler.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            if event.readiness().is_readable() {
-                handler.handle_read(&mut poll, event.token(), event.readiness());
-            }
-
-            if event.readiness().is_writable() {
-                handler.handle_write(&mut poll, event.token(), event.readiness());
-            }
-        }
-    }
-}

test/test_notify.rs

@@ -1,192 +0,0 @@
-use {localhost, sleep_ms};
-use mio::*;
-use mio::deprecated::{EventLoop, EventLoopBuilder, Handler, Sender, NotifyError};
-use mio::net::TcpListener;
-use std::thread;
-
-struct TestHandler {
-    sender: Sender<String>,
-    notify: usize
-}
-
-impl TestHandler {
-    fn new(sender: Sender<String>) -> TestHandler {
-        TestHandler {
-            sender,
-            notify: 0
-        }
-    }
-}
-
-impl Handler for TestHandler {
-    type Timeout = usize;
-    type Message = String;
-
-    fn notify(&mut self, event_loop: &mut EventLoop<TestHandler>, msg: String) {
-        match self.notify {
-            0 => {
-                assert!(msg == "First", "actual={}", msg);
-                self.sender.send("Second".to_string()).unwrap();
-            }
-            1 => {
-                assert!(msg == "Second", "actual={}", msg);
-                event_loop.shutdown();
-            }
-            v => panic!("unexpected value for notify; val={}", v)
-        }
-
-        self.notify += 1;
-    }
-}
-
-#[test]
-pub fn test_notify() {
-    debug!("Starting TEST_NOTIFY");
-    let mut event_loop = EventLoop::new().unwrap();
-
-    let addr = localhost();
-
-    // Setup a server socket so that the event loop blocks
-    let srv = TcpListener::bind(&addr).unwrap();
-
-    event_loop.register(&srv, Token(0), Ready::readable() | Ready::writable(), PollOpt::edge()).unwrap();
-
-    let sender = event_loop.channel();
-
-    thread::spawn(move || {
-        sleep_ms(1_000);
-        sender.send("First".to_string()).unwrap();
-    });
-
-    let sender = event_loop.channel();
-    let mut handler = TestHandler::new(sender);
-
-    // Start the event loop
-    event_loop.run(&mut handler).unwrap();
-
-    assert!(handler.notify == 2, "actual={}", handler.notify);
-}
-
-#[test]
-pub fn test_notify_capacity() {
-    use std::sync::mpsc::*;
-    use std::thread;
-
-    struct Capacity(Receiver<i32>);
-
-    impl Handler for Capacity {
-        type Message = i32;
-        type Timeout = ();
-
-        fn notify(&mut self, event_loop: &mut EventLoop<Capacity>, msg: i32) {
-            if msg == 1 {
-                self.0.recv().unwrap();
-            } else if msg == 3 {
-                event_loop.shutdown();
-            }
-        }
-    }
-
-    let mut builder = EventLoopBuilder::new();
-    builder.notify_capacity(1);
-
-    let (tx, rx) = channel::<i32>();
-    let mut event_loop = builder.build().unwrap();
-    let notify = event_loop.channel();
-
-    let handle = thread::spawn(move || {
-        let mut handler = Capacity(rx);
-        event_loop.run(&mut handler).unwrap();
-    });
-
-    assert!(notify.send(1).is_ok());
-
-    loop {
-        if notify.send(2).is_err() {
-            break;
-        }
-    }
-
-    tx.send(1).unwrap();
-
-    loop {
-        if notify.send(3).is_ok() {
-            break;
-        }
-    }
-
-    handle.join().unwrap();
-}
-
-#[test]
-pub fn test_notify_drop() {
-    use std::sync::mpsc::{self,Sender};
-    use std::thread;
-
-    struct MessageDrop(Sender<u8>);
-
-    impl Drop for MessageDrop {
-        fn drop(&mut self) {
-            self.0.send(0).unwrap();
-        }
-    }
-
-    struct DummyHandler;
-
-    impl Handler for DummyHandler {
-        type Timeout = ();
-        type Message = MessageDrop;
-
-        fn notify(&mut self, event_loop: &mut EventLoop<Self>, msg: MessageDrop) {
-            msg.0.send(1).unwrap();
-            drop(msg);
-            // We stop after the first message
-            event_loop.shutdown();
-        }
-    }
-
-    let (tx_notif_1, rx_notif_1) = mpsc::channel();
-    let (tx_notif_2, rx_notif_2) = mpsc::channel();
-    let (tx_notif_3, _unused) = mpsc::channel();
-    let (tx_exit_loop, rx_exit_loop) = mpsc::channel();
-    let (tx_drop_loop, rx_drop_loop) = mpsc::channel();
-
-    let mut event_loop = EventLoop::new().unwrap();
-    let notify = event_loop.channel();
-
-    let handle = thread::spawn(move || {
-        let mut handler = DummyHandler;
-        event_loop.run(&mut handler).unwrap();
-
-        // Confirmation we exited the loop
-        tx_exit_loop.send(()).unwrap();
-
-        // Order to drop the loop
-        rx_drop_loop.recv().unwrap();
-        drop(event_loop);
-    });
-    notify.send(MessageDrop(tx_notif_1)).unwrap();
-    assert_eq!(rx_notif_1.recv().unwrap(), 1); // Response from the loop
-    assert_eq!(rx_notif_1.recv().unwrap(), 0); // Drop notification
-
-    // We wait for the event loop to exit before sending the second notification
-    rx_exit_loop.recv().unwrap();
-    notify.send(MessageDrop(tx_notif_2)).unwrap();
-
-    // We ensure the message is indeed stuck in the queue
-    sleep_ms(100);
-    assert!(rx_notif_2.try_recv().is_err());
-
-    // Give the order to drop the event loop
-    tx_drop_loop.send(()).unwrap();
-    assert_eq!(rx_notif_2.recv().unwrap(), 0); // Drop notification
-
-    // Check that sending a new notification will return an error
-    // We should also get our message back
-    match notify.send(MessageDrop(tx_notif_3)).unwrap_err() {
-        NotifyError::Closed(Some(..)) => {}
-        _ => panic!(),
-    }
-
-    handle.join().unwrap();
-}

test/test_oneshot.rs

@@ -1,64 +0,0 @@
-use mio::*;
-use mio::net::{TcpListener, TcpStream};
-use std::io::*;
-use std::time::Duration;
-
-const MS: u64 = 1_000;
-
-#[test]
-pub fn test_tcp_edge_oneshot() {
-    let _ = ::env_logger::init();
-
-    let mut poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-
-    // Create the listener
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-
-    // Register the listener with `Poll`
-    poll.register(&l, Token(0), Ready::readable(), PollOpt::level()).unwrap();
-
-    // Connect a socket, we are going to write to it
-    let mut s1 = TcpStream::connect(&l.local_addr().unwrap()).unwrap();
-    poll.register(&s1, Token(1), Ready::writable(), PollOpt::level()).unwrap();
-
-    wait_for(&mut poll, &mut events, Token(0));
-
-    // Get pair
-    let (mut s2, _) = l.accept().unwrap();
-    poll.register(&s2, Token(2), Ready::readable(), PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    wait_for(&mut poll, &mut events, Token(1));
-
-    let res = s1.write(b"foo").unwrap();
-    assert_eq!(3, res);
-
-    let mut buf = [0; 1];
-
-    for byte in b"foo" {
-        wait_for(&mut poll, &mut events, Token(2));
-
-        assert_eq!(1, s2.read(&mut buf).unwrap());
-        assert_eq!(*byte, buf[0]);
-
-        poll.reregister(&s2, Token(2), Ready::readable(), PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-        if *byte == b'o' {
-            poll.reregister(&s2, Token(2), Ready::readable(), PollOpt::edge() | PollOpt::oneshot()).unwrap();
-        }
-    }
-}
-
-fn wait_for(poll: &mut Poll, events: &mut Events, token: Token) {
-    loop {
-        poll.poll(events, Some(Duration::from_millis(MS))).unwrap();
-
-        let cnt = (0..events.len()).map(|i| events.get(i).unwrap())
-                                   .filter(|e| e.token() == token)
-                                   .count();
-
-        assert!(cnt < 2, "token appeared multiple times in poll results; cnt={:}", cnt);
-
-        if cnt == 1 { return };
-    }
-}

test/test_poll.rs

@@ -1,18 +0,0 @@
-use mio::*;
-use std::time::Duration;
-
-#[test]
-fn test_poll_closes_fd() {
-    for _ in 0..2000 {
-        let poll = Poll::new().unwrap();
-        let mut events = Events::with_capacity(4);
-        let (registration, set_readiness) = Registration::new2();
-
-        poll.register(&registration, Token(0), Ready::readable(), PollOpt::edge()).unwrap();
-        poll.poll(&mut events, Some(Duration::from_millis(0))).unwrap();
-
-        drop(poll);
-        drop(set_readiness);
-        drop(registration);
-    }
-}

test/test_poll_channel.rs

@@ -1,285 +0,0 @@
-use {expect_events, sleep_ms};
-use mio::{channel, Events, Poll, PollOpt, Ready, Token};
-use mio::event::Event;
-use std::sync::mpsc::TryRecvError;
-use std::thread;
-use std::time::Duration;
-
-#[test]
-pub fn test_poll_channel_edge() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-    let (tx, rx) = channel::channel();
-
-    poll.register(&rx, Token(123), Ready::readable(), PollOpt::edge()).unwrap();
-
-    // Wait, but nothing should happen
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    // Push the value
-    tx.send("hello").unwrap();
-
-    // Polling will contain the event
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(1, num);
-
-    let event = events.get(0).unwrap();
-    assert_eq!(event.token(), Token(123));
-    assert_eq!(event.readiness(), Ready::readable());
-
-    // Poll again and there should be no events
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    // Read the value
-    assert_eq!("hello", rx.try_recv().unwrap());
-
-    // Poll again, nothing
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    // Push a value
-    tx.send("goodbye").unwrap();
-
-    // Have an event
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(1, num);
-
-    let event = events.get(0).unwrap();
-    assert_eq!(event.token(), Token(123));
-    assert_eq!(event.readiness(), Ready::readable());
-
-    // Read the value
-    rx.try_recv().unwrap();
-
-    // Drop the sender half
-    drop(tx);
-
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(1, num);
-
-    let event = events.get(0).unwrap();
-    assert_eq!(event.token(), Token(123));
-    assert_eq!(event.readiness(), Ready::readable());
-
-    match rx.try_recv() {
-        Err(TryRecvError::Disconnected) => {}
-        no => panic!("unexpected value {:?}", no),
-    }
-
-}
-
-#[test]
-pub fn test_poll_channel_oneshot() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-    let (tx, rx) = channel::channel();
-
-    poll.register(&rx, Token(123), Ready::readable(), PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    // Wait, but nothing should happen
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    // Push the value
-    tx.send("hello").unwrap();
-
-    // Polling will contain the event
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(1, num);
-
-    let event = events.get(0).unwrap();
-    assert_eq!(event.token(), Token(123));
-    assert_eq!(event.readiness(), Ready::readable());
-
-    // Poll again and there should be no events
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    // Read the value
-    assert_eq!("hello", rx.try_recv().unwrap());
-
-    // Poll again, nothing
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    // Push a value
-    tx.send("goodbye").unwrap();
-
-    // Poll again, nothing
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    // Reregistering will re-trigger the notification
-    for _ in 0..3 {
-        poll.reregister(&rx, Token(123), Ready::readable(), PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-        // Have an event
-        let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-        assert_eq!(1, num);
-
-        let event = events.get(0).unwrap();
-        assert_eq!(event.token(), Token(123));
-        assert_eq!(event.readiness(), Ready::readable());
-    }
-
-    // Get the value
-    assert_eq!("goodbye", rx.try_recv().unwrap());
-
-    poll.reregister(&rx, Token(123), Ready::readable(), PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    // Have an event
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    poll.reregister(&rx, Token(123), Ready::readable(), PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    // Have an event
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-}
-
-#[test]
-pub fn test_poll_channel_level() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-    let (tx, rx) = channel::channel();
-
-    poll.register(&rx, Token(123), Ready::readable(), PollOpt::level()).unwrap();
-
-    // Wait, but nothing should happen
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    // Push the value
-    tx.send("hello").unwrap();
-
-    // Polling will contain the event
-    for i in 0..5 {
-        let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-        assert!(1 == num, "actually got {} on iteration {}", num, i);
-
-        let event = events.get(0).unwrap();
-        assert_eq!(event.token(), Token(123));
-        assert_eq!(event.readiness(), Ready::readable());
-    }
-
-    // Read the value
-    assert_eq!("hello", rx.try_recv().unwrap());
-
-    // Wait, but nothing should happen
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-}
-
-#[test]
-pub fn test_poll_channel_writable() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-    let (tx, rx) = channel::channel();
-
-    poll.register(&rx, Token(123), Ready::writable(), PollOpt::edge()).unwrap();
-
-    // Wait, but nothing should happen
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-
-    // Push the value
-    tx.send("hello").unwrap();
-
-    // Wait, but nothing should happen
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-}
-
-#[test]
-pub fn test_dropping_receive_before_poll() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-    let (tx, rx) = channel::channel();
-
-    poll.register(&rx, Token(123), Ready::readable(), PollOpt::edge()).unwrap();
-
-    // Push the value
-    tx.send("hello").unwrap();
-
-    // Drop the receive end
-    drop(rx);
-
-    // Wait, but nothing should happen
-    let num = poll.poll(&mut events, Some(Duration::from_millis(300))).unwrap();
-    assert_eq!(0, num);
-}
-
-#[test]
-pub fn test_mixing_channel_with_socket() {
-    use mio::net::{TcpListener, TcpStream};
-
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-    let (tx, rx) = channel::channel();
-
-    // Create the listener
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-
-    // Register the listener with `Poll`
-    poll.register(&l, Token(0), Ready::readable(), PollOpt::edge()).unwrap();
-    poll.register(&rx, Token(1), Ready::readable(), PollOpt::edge()).unwrap();
-
-    // Push a value onto the channel
-    tx.send("hello").unwrap();
-
-    // Connect a TCP socket
-    let s1 = TcpStream::connect(&l.local_addr().unwrap()).unwrap();
-
-    // Register the socket
-    poll.register(&s1, Token(2), Ready::readable(), PollOpt::edge()).unwrap();
-
-    // Sleep a bit to ensure it arrives at dest
-    sleep_ms(250);
-
-    expect_events(&poll, &mut events, 2, vec![
-        Event::new(Ready::empty(), Token(0)),
-        Event::new(Ready::empty(), Token(1)),
-    ]);
-}
-
-#[test]
-pub fn test_sending_from_other_thread_while_polling() {
-    const ITERATIONS: usize = 20;
-    const THREADS: usize = 5;
-
-    // Make sure to run multiple times
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-
-    for _ in 0..ITERATIONS {
-        let (tx, rx) = channel::channel();
-        poll.register(&rx, Token(0), Ready::readable(), PollOpt::edge()).unwrap();
-
-        for _ in 0..THREADS {
-            let tx = tx.clone();
-
-            thread::spawn(move || {
-                sleep_ms(50);
-                tx.send("ping").unwrap();
-            });
-        }
-
-        let mut recv = 0;
-
-        while recv < THREADS {
-            let num = poll.poll(&mut events, None).unwrap();
-
-            if num != 0 {
-                assert_eq!(1, num);
-                assert_eq!(events.get(0).unwrap().token(), Token(0));
-
-                while let Ok(_) = rx.try_recv() {
-                    recv += 1;
-                }
-            }
-        }
-    }
-}

test/test_register_deregister.rs

@@ -1,123 +0,0 @@
-use {expect_events, localhost, TryWrite};
-use mio::{Events, Poll, PollOpt, Ready, Token};
-use mio::event::Event;
-use mio::net::{TcpListener, TcpStream};
-use bytes::SliceBuf;
-use std::time::Duration;
-
-const SERVER: Token = Token(0);
-const CLIENT: Token = Token(1);
-
-struct TestHandler {
-    server: TcpListener,
-    client: TcpStream,
-    state: usize,
-}
-
-impl TestHandler {
-    fn new(srv: TcpListener, cli: TcpStream) -> TestHandler {
-        TestHandler {
-            server: srv,
-            client: cli,
-            state: 0,
-        }
-    }
-
-    fn handle_read(&mut self, poll: &mut Poll, token: Token) {
-        match token {
-            SERVER => {
-                trace!("handle_read; token=SERVER");
-                let mut sock = self.server.accept().unwrap().0;
-                sock.try_write_buf(&mut SliceBuf::wrap(b"foobar")).unwrap();
-            }
-            CLIENT => {
-                trace!("handle_read; token=CLIENT");
-                assert!(self.state == 0, "unexpected state {}", self.state);
-                self.state = 1;
-                poll.reregister(&self.client, CLIENT, Ready::writable(), PollOpt::level()).unwrap();
-            }
-            _ => panic!("unexpected token"),
-        }
-    }
-
-    fn handle_write(&mut self, poll: &mut Poll, token: Token) {
-        debug!("handle_write; token={:?}; state={:?}", token, self.state);
-
-        assert!(token == CLIENT, "unexpected token {:?}", token);
-        assert!(self.state == 1, "unexpected state {}", self.state);
-
-        self.state = 2;
-        poll.deregister(&self.client).unwrap();
-        poll.deregister(&self.server).unwrap();
-    }
-}
-
-#[test]
-pub fn test_register_deregister() {
-    let _ = ::env_logger::init();
-
-    debug!("Starting TEST_REGISTER_DEREGISTER");
-    let mut poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-
-    let addr = localhost();
-
-    let server = TcpListener::bind(&addr).unwrap();
-
-    info!("register server socket");
-    poll.register(&server, SERVER, Ready::readable(), PollOpt::edge()).unwrap();
-
-    let client = TcpStream::connect(&addr).unwrap();
-
-    // Register client socket only as writable
-    poll.register(&client, CLIENT, Ready::readable(), PollOpt::level()).unwrap();
-
-    let mut handler = TestHandler::new(server, client);
-
-    loop {
-        poll.poll(&mut events, None).unwrap();
-
-        if let Some(event) = events.get(0) {
-            if event.readiness().is_readable() {
-                handler.handle_read(&mut poll, event.token());
-            }
-
-            if event.readiness().is_writable() {
-                handler.handle_write(&mut poll, event.token());
-                break;
-            }
-        }
-    }
-
-    poll.poll(&mut events, Some(Duration::from_millis(100))).unwrap();
-    assert_eq!(events.len(), 0);
-}
-
-#[test]
-pub fn test_register_empty_interest() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(1024);
-    let addr = localhost();
-
-    let sock = TcpListener::bind(&addr).unwrap();
-
-    poll.register(&sock, Token(0), Ready::empty(), PollOpt::edge()).unwrap();
-
-    let client = TcpStream::connect(&addr).unwrap();
-
-    // The connect is not guaranteed to have started until it is registered
-    // https://docs.rs/mio/0.6.10/mio/struct.Poll.html#registering-handles
-    poll.register(&client, Token(1), Ready::empty(), PollOpt::edge()).unwrap();
-
-    // sock is registered with empty interest, we should not receive any event
-    poll.poll(&mut events, Some(Duration::from_millis(100))).unwrap();
-    assert_eq!(events.len(), 0, "Received unexpected event: {:?}", events.get(0).unwrap());
-
-    // now sock is reregistered with readable, we should receive the pending event
-    poll.reregister(&sock, Token(0), Ready::readable(), PollOpt::edge()).unwrap();
-    expect_events(&poll, &mut events, 2, vec![
-        Event::new(Ready::readable(), Token(0))
-    ]);
-
-    poll.reregister(&sock, Token(0), Ready::empty(), PollOpt::edge()).unwrap();
-}

test/test_register_multiple_event_loops.rs

@@ -1,63 +0,0 @@
-use localhost;
-use mio::*;
-use mio::net::{TcpListener, TcpStream, UdpSocket};
-use std::io::ErrorKind;
-
-#[test]
-fn test_tcp_register_multiple_event_loops() {
-    let addr = localhost();
-    let listener = TcpListener::bind(&addr).unwrap();
-
-    let poll1 = Poll::new().unwrap();
-    poll1.register(&listener, Token(0), Ready::readable() | Ready::writable(), PollOpt::edge()).unwrap();
-
-    let poll2 = Poll::new().unwrap();
-
-    // Try registering the same socket with the initial one
-    let res = poll2.register(&listener, Token(0), Ready::readable() | Ready::writable(), PollOpt::edge());
-    assert!(res.is_err());
-    assert_eq!(res.unwrap_err().kind(), ErrorKind::Other);
-
-    // Try cloning the socket and registering it again
-    let listener2 = listener.try_clone().unwrap();
-    let res = poll2.register(&listener2, Token(0), Ready::readable() | Ready::writable(), PollOpt::edge());
-    assert!(res.is_err());
-    assert_eq!(res.unwrap_err().kind(), ErrorKind::Other);
-
-    // Try the stream
-    let stream = TcpStream::connect(&addr).unwrap();
-
-    poll1.register(&stream, Token(1), Ready::readable() | Ready::writable(), PollOpt::edge()).unwrap();
-
-    let res = poll2.register(&stream, Token(1), Ready::readable() | Ready::writable(), PollOpt::edge());
-    assert!(res.is_err());
-    assert_eq!(res.unwrap_err().kind(), ErrorKind::Other);
-
-    // Try cloning the socket and registering it again
-    let stream2 = stream.try_clone().unwrap();
-    let res = poll2.register(&stream2, Token(1), Ready::readable() | Ready::writable(), PollOpt::edge());
-    assert!(res.is_err());
-    assert_eq!(res.unwrap_err().kind(), ErrorKind::Other);
-}
-
-#[test]
-fn test_udp_register_multiple_event_loops() {
-    let addr = localhost();
-    let socket = UdpSocket::bind(&addr).unwrap();
-
-    let poll1 = Poll::new().unwrap();
-    poll1.register(&socket, Token(0), Ready::readable() | Ready::writable(), PollOpt::edge()).unwrap();
-
-    let poll2 = Poll::new().unwrap();
-
-    // Try registering the same socket with the initial one
-    let res = poll2.register(&socket, Token(0), Ready::readable() | Ready::writable(), PollOpt::edge());
-    assert!(res.is_err());
-    assert_eq!(res.unwrap_err().kind(), ErrorKind::Other);
-
-    // Try cloning the socket and registering it again
-    let socket2 = socket.try_clone().unwrap();
-    let res = poll2.register(&socket2, Token(0), Ready::readable() | Ready::writable(), PollOpt::edge());
-    assert!(res.is_err());
-    assert_eq!(res.unwrap_err().kind(), ErrorKind::Other);
-}

test/test_reregister_without_poll.rs

@@ -1,28 +0,0 @@
-use {sleep_ms};
-use mio::*;
-use mio::net::{TcpListener, TcpStream};
-use std::time::Duration;
-
-const MS: u64 = 1_000;
-
-#[test]
-pub fn test_reregister_different_without_poll() {
-    let mut events = Events::with_capacity(1024);
-    let poll = Poll::new().unwrap();
-
-    // Create the listener
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-
-    // Register the listener with `Poll`
-    poll.register(&l, Token(0), Ready::readable(), PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    let s1 = TcpStream::connect(&l.local_addr().unwrap()).unwrap();
-    poll.register(&s1, Token(2), Ready::readable(), PollOpt::edge()).unwrap();
-
-    sleep_ms(MS);
-
-    poll.reregister(&l, Token(0), Ready::writable(), PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    poll.poll(&mut events, Some(Duration::from_millis(MS))).unwrap();
-    assert_eq!(events.len(), 0);
-}

test/test_smoke.rs

@@ -1,23 +0,0 @@
-extern crate mio;
-
-use mio::{Events, Poll, Token, Ready, PollOpt};
-use mio::net::TcpListener;
-use std::time::Duration;
-
-#[test]
-fn run_once_with_nothing() {
-    let mut events = Events::with_capacity(1024);
-    let poll = Poll::new().unwrap();
-    poll.poll(&mut events, Some(Duration::from_millis(100))).unwrap();
-}
-
-#[test]
-fn add_then_drop() {
-    let mut events = Events::with_capacity(1024);
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-    let poll = Poll::new().unwrap();
-    poll.register(&l, Token(1), Ready::readable() | Ready::writable(), PollOpt::edge()).unwrap();
-    drop(l);
-    poll.poll(&mut events, Some(Duration::from_millis(100))).unwrap();
-
-}

test/test_subprocess_pipe.rs

@@ -1,249 +0,0 @@
-use {TryRead, TryWrite};
-use std::mem;
-use mio::*;
-use std::io;
-use mio::deprecated::{EventLoop, Handler};
-use mio::deprecated::unix::{PipeReader, PipeWriter};
-use std::process::{Command, Stdio, Child};
-
-
-struct SubprocessClient {
-    stdin: Option<PipeWriter>,
-    stdout: Option<PipeReader>,
-    stderr: Option<PipeReader>,
-    stdin_token : Token,
-    stdout_token : Token,
-    stderr_token : Token,
-    output : Vec<u8>,
-    output_stderr : Vec<u8>,
-    input : Vec<u8>,
-    input_offset : usize,
-    buf : [u8; 65536],
-}
-
-
-// Sends a message and expects to receive the same exact message, one at a time
-impl SubprocessClient {
-    fn new(stdin: Option<PipeWriter>, stdout : Option<PipeReader>, stderr : Option<PipeReader>, data : &[u8]) -> SubprocessClient {
-        SubprocessClient {
-            stdin: stdin,
-            stdout: stdout,
-            stderr: stderr,
-            stdin_token : Token(0),
-            stdout_token : Token(1),
-            stderr_token : Token(2),
-            output : Vec::<u8>::new(),
-            output_stderr : Vec::<u8>::new(),
-            buf : [0; 65536],
-            input : data.to_vec(),
-            input_offset : 0,
-        }
-    }
-
-    fn readable(&mut self, event_loop: &mut EventLoop<SubprocessClient>) -> io::Result<()> {
-        let mut eof = false;
-        match self.stdout {
-            None => unreachable!(),
-            Some (ref mut stdout) => match stdout.try_read(&mut self.buf[..]) {
-                Ok(None) => {
-                }
-                Ok(Some(r)) => {
-                    if r == 0 {
-                        eof = true;
-                    } else {
-                         self.output.extend(&self.buf[0..r]);
-                    }
-                }
-                Err(e) => {
-                    return Err(e);
-                }
-            }
-        };
-        if eof {
-            drop(self.stdout.take());
-            match self.stderr {
-                None => event_loop.shutdown(),
-                Some(_) => {},
-            }
-        }
-        return Ok(());
-    }
-
-    fn readable_stderr(&mut self, event_loop: &mut EventLoop<SubprocessClient>) -> io::Result<()> {
-        let mut eof = false;
-        match self.stderr {
-            None => unreachable!(),
-            Some(ref mut stderr) => match stderr.try_read(&mut self.buf[..]) {
-                Ok(None) => {
-                }
-                Ok(Some(r)) => {
-                    if r == 0 {
-                        eof = true;
-                    } else {
-                        self.output_stderr.extend(&self.buf[0..r]);
-                    }
-                }
-                Err(e) => {
-                    return Err(e);
-                }
-            }
-        };
-        if eof {
-                        drop(self.stderr.take());
-                        match self.stdout {
-                            None => event_loop.shutdown(),
-                            Some(_) => {},
-                        }
-        }
-        return Ok(());
-    }
-
-    fn writable(&mut self, event_loop: &mut EventLoop<SubprocessClient>) -> io::Result<()> {
-        let mut ok = true;
-        match self.stdin {
-            None => unreachable!(),
-            Some(ref mut stdin) => match stdin.try_write(&(&self.input)[self.input_offset..]) {
-                Ok(None) => {
-                },
-                Ok(Some(r)) => {
-                    if r == 0 {
-                        ok = false;
-                    } else {
-                        self.input_offset += r;
-                    }
-                },
-                Err(_) => {
-                    ok = false;
-                },
-            }
-        }
-        if self.input_offset == self.input.len() || !ok {
-            drop(self.stdin.take());
-            match self.stderr {
-                None => match self.stdout {
-                            None => event_loop.shutdown(),
-                            Some(_) => {},
-                },
-                Some(_) => {},
-            }
-        }
-        return Ok(());
-    }
-
-}
-
-impl Handler for SubprocessClient {
-    type Timeout = usize;
-    type Message = ();
-
-    fn ready(&mut self, event_loop: &mut EventLoop<SubprocessClient>, token: Token,
-             _: Ready) {
-        if token == self.stderr_token {
-            let _x = self.readable_stderr(event_loop);
-        } else {
-            let _x = self.readable(event_loop);
-        }
-        if token == self.stdin_token {
-            let _y = self.writable(event_loop);
-        }
-    }
-}
-
-
-
-
-const TEST_DATA : [u8; 1024 * 4096] = [42; 1024 * 4096];
-pub fn subprocess_communicate(mut process : Child, input : &[u8]) -> (Vec<u8>, Vec<u8>) {
-    let mut event_loop = EventLoop::<SubprocessClient>::new().unwrap();
-    let stdin : Option<PipeWriter>;
-    let stdin_exists : bool;
-    match process.stdin {
-      None => stdin_exists = false,
-      Some(_) => stdin_exists = true,
-    }
-    if stdin_exists {
-        match PipeWriter::from_stdin(process.stdin.take().unwrap()) {
-            Err(e) => panic!(e),
-            Ok(pipe) => stdin = Some(pipe),
-        }
-    } else {
-        stdin = None;
-    }
-    let stdout_exists : bool;
-    let stdout : Option<PipeReader>;
-    match process.stdout {
-      None => stdout_exists = false,
-      Some(_) => stdout_exists = true,
-    }
-    if stdout_exists {
-        match PipeReader::from_stdout(process.stdout.take().unwrap()) {
-            Err(e) => panic!(e),
-            Ok(pipe) => stdout = Some(pipe),
-        }
-    } else {
-        stdout = None;
-    }
-    let stderr_exists : bool;
-    let stderr : Option<PipeReader>;
-    match process.stderr {
-      None => stderr_exists = false,
-      Some(_) => stderr_exists = true,
-    }
-    if stderr_exists {
-        match PipeReader::from_stderr(process.stderr.take().unwrap()) {
-              Err(e) => panic!(e),
-              Ok(pipe) => stderr = Some(pipe),
-        }
-    } else {
-        stderr = None
-    }
-
-    let mut subprocess = SubprocessClient::new(stdin,
-                                               stdout,
-                                               stderr,
-                                               input);
-    match subprocess.stdout {
-       Some(ref sub_stdout) => event_loop.register(sub_stdout, subprocess.stdout_token, Ready::readable(),
-                                                   PollOpt::level()).unwrap(),
-       None => {},
-    }
-
-    match subprocess.stderr {
-        Some(ref sub_stderr) => event_loop.register(sub_stderr, subprocess.stderr_token, Ready::readable(),
-                        PollOpt::level()).unwrap(),
-        None => {},
-    }
-
-    // Connect to the server
-    match subprocess.stdin {
-        Some (ref sub_stdin) => event_loop.register(sub_stdin, subprocess.stdin_token, Ready::writable(),
-                        PollOpt::level()).unwrap(),
-         None => {},
-    }
-
-    // Start the event loop
-    event_loop.run(&mut subprocess).unwrap();
-    let _ = process.wait();
-
-    let ret_stdout = mem::replace(&mut subprocess.output, Vec::<u8>::new());
-    let ret_stderr = mem::replace(&mut subprocess.output_stderr, Vec::<u8>::new());
-    return (ret_stdout, ret_stderr);
-}
-
-#[test]
-fn test_subprocess_pipe() {
-    let process =
-           Command::new("/bin/cat")
-           .stdin(Stdio::piped())
-           .stdout(Stdio::piped())
-           .stderr(Stdio::piped())
-           .spawn().unwrap();
-     let (ret_stdout, ret_stderr) = subprocess_communicate(process, &TEST_DATA[..]);
-     assert_eq!(TEST_DATA.len(), ret_stdout.len());
-     assert_eq!(0usize, ret_stderr.len());
-     let mut i : usize = 0;
-     for item in TEST_DATA.iter() {
-         assert_eq!(*item, ret_stdout[i]);
-         i += 1;
-     }
-}

test/test_tcp.rs

@@ -1,660 +0,0 @@
-use std::cmp;
-use std::io::prelude::*;
-use std::io;
-use std::net;
-use std::sync::mpsc::channel;
-use std::thread;
-use std::time::Duration;
-
-use net2::{self, TcpStreamExt};
-
-use {TryRead, TryWrite};
-use mio::{Token, Ready, PollOpt, Poll, Events};
-use iovec::IoVec;
-use mio::net::{TcpListener, TcpStream};
-
-#[test]
-fn accept() {
-    struct H { hit: bool, listener: TcpListener, shutdown: bool }
-
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-    let addr = l.local_addr().unwrap();
-
-    let t = thread::spawn(move || {
-        net::TcpStream::connect(&addr).unwrap();
-    });
-
-    let poll = Poll::new().unwrap();
-
-    poll.register(&l, Token(1), Ready::readable(), PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(128);
-
-    let mut h = H { hit: false, listener: l, shutdown: false };
-    while !h.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            h.hit = true;
-            assert_eq!(event.token(), Token(1));
-            assert!(event.readiness().is_readable());
-            assert!(h.listener.accept().is_ok());
-            h.shutdown = true;
-        }
-    }
-    assert!(h.hit);
-    assert!(h.listener.accept().unwrap_err().kind() == io::ErrorKind::WouldBlock);
-    t.join().unwrap();
-}
-
-#[test]
-fn connect() {
-    struct H { hit: u32, shutdown: bool }
-
-    let l = net::TcpListener::bind("127.0.0.1:0").unwrap();
-    let addr = l.local_addr().unwrap();
-
-    let (tx, rx) = channel();
-    let (tx2, rx2) = channel();
-    let t = thread::spawn(move || {
-        let s = l.accept().unwrap();
-        rx.recv().unwrap();
-        drop(s);
-        tx2.send(()).unwrap();
-    });
-
-    let poll = Poll::new().unwrap();
-    let s = TcpStream::connect(&addr).unwrap();
-
-    poll.register(&s, Token(1), Ready::readable() | Ready::writable(), PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(128);
-
-    let mut h = H { hit: 0, shutdown: false };
-    while !h.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            assert_eq!(event.token(), Token(1));
-            match h.hit {
-                0 => assert!(event.readiness().is_writable()),
-                1 => assert!(event.readiness().is_readable()),
-                _ => panic!(),
-            }
-            h.hit += 1;
-            h.shutdown = true;
-        }
-    }
-    assert_eq!(h.hit, 1);
-    tx.send(()).unwrap();
-    rx2.recv().unwrap();
-    h.shutdown = false;
-    while !h.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            assert_eq!(event.token(), Token(1));
-            match h.hit {
-                0 => assert!(event.readiness().is_writable()),
-                1 => assert!(event.readiness().is_readable()),
-                _ => panic!(),
-            }
-            h.hit += 1;
-            h.shutdown = true;
-        }
-    }
-    assert_eq!(h.hit, 2);
-    t.join().unwrap();
-}
-
-#[test]
-fn read() {
-    const N: usize = 16 * 1024 * 1024;
-    struct H { amt: usize, socket: TcpStream, shutdown: bool }
-
-    let l = net::TcpListener::bind("127.0.0.1:0").unwrap();
-    let addr = l.local_addr().unwrap();
-
-    let t = thread::spawn(move || {
-        let mut s = l.accept().unwrap().0;
-        let b = [0; 1024];
-        let mut amt = 0;
-        while amt < N {
-            amt += s.write(&b).unwrap();
-        }
-    });
-
-    let poll = Poll::new().unwrap();
-    let s = TcpStream::connect(&addr).unwrap();
-
-    poll.register(&s, Token(1), Ready::readable(), PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(128);
-
-    let mut h = H { amt: 0, socket: s, shutdown: false };
-    while !h.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            assert_eq!(event.token(), Token(1));
-            let mut b = [0; 1024];
-            loop {
-                if let Some(amt) = h.socket.try_read(&mut b).unwrap() {
-                    h.amt += amt;
-                } else {
-                    break
-                }
-                if h.amt >= N {
-                    h.shutdown = true;
-                    break
-                }
-            }
-        }
-    }
-    t.join().unwrap();
-}
-
-#[test]
-fn peek() {
-    const N: usize = 16 * 1024 * 1024;
-    struct H { amt: usize, socket: TcpStream, shutdown: bool }
-
-    let l = net::TcpListener::bind("127.0.0.1:0").unwrap();
-    let addr = l.local_addr().unwrap();
-
-    let t = thread::spawn(move || {
-        let mut s = l.accept().unwrap().0;
-        let b = [0; 1024];
-        let mut amt = 0;
-        while amt < N {
-            amt += s.write(&b).unwrap();
-        }
-    });
-
-    let poll = Poll::new().unwrap();
-    let s = TcpStream::connect(&addr).unwrap();
-
-    poll.register(&s, Token(1), Ready::readable(), PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(128);
-
-    let mut h = H { amt: 0, socket: s, shutdown: false };
-    while !h.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            assert_eq!(event.token(), Token(1));
-            let mut b = [0; 1024];
-            match h.socket.peek(&mut b) {
-                Ok(_) => (),
-                Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
-                    continue
-                },
-                Err(e) => panic!("unexpected error: {:?}", e),
-            }
-
-            loop {
-                if let Some(amt) = h.socket.try_read(&mut b).unwrap() {
-                    h.amt += amt;
-                } else {
-                    break
-                }
-                if h.amt >= N {
-                    h.shutdown = true;
-                    break
-                }
-            }
-        }
-    }
-    t.join().unwrap();
-}
-
-#[test]
-fn read_bufs() {
-    const N: usize = 16 * 1024 * 1024;
-
-    let l = net::TcpListener::bind("127.0.0.1:0").unwrap();
-    let addr = l.local_addr().unwrap();
-
-    let t = thread::spawn(move || {
-        let mut s = l.accept().unwrap().0;
-        let b = [1; 1024];
-        let mut amt = 0;
-        while amt < N {
-            amt += s.write(&b).unwrap();
-        }
-    });
-
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(128);
-
-    let s = TcpStream::connect(&addr).unwrap();
-
-    poll.register(&s, Token(1), Ready::readable(), PollOpt::level()).unwrap();
-
-    let b1 = &mut [0; 10][..];
-    let b2 = &mut [0; 383][..];
-    let b3 = &mut [0; 28][..];
-    let b4 = &mut [0; 8][..];
-    let b5 = &mut [0; 128][..];
-    let mut b: [&mut IoVec; 5] = [
-        b1.into(),
-        b2.into(),
-        b3.into(),
-        b4.into(),
-        b5.into(),
-    ];
-
-    let mut so_far = 0;
-    loop {
-        for buf in b.iter_mut() {
-            for byte in buf.as_mut_bytes() {
-                *byte = 0;
-            }
-        }
-
-        poll.poll(&mut events, None).unwrap();
-
-        match s.read_bufs(&mut b) {
-            Ok(0) => {
-                assert_eq!(so_far, N);
-                break
-            }
-            Ok(mut n) => {
-                so_far += n;
-                for buf in b.iter() {
-                    let buf = buf.as_bytes();
-                    for byte in buf[..cmp::min(n, buf.len())].iter() {
-                        assert_eq!(*byte, 1);
-                    }
-                    n = n.saturating_sub(buf.len());
-                    if n == 0 {
-                        break
-                    }
-                }
-                assert_eq!(n, 0);
-            }
-            Err(e) => assert_eq!(e.kind(), io::ErrorKind::WouldBlock),
-        }
-    }
-
-    t.join().unwrap();
-}
-
-#[test]
-fn write() {
-    const N: usize = 16 * 1024 * 1024;
-    struct H { amt: usize, socket: TcpStream, shutdown: bool }
-
-    let l = net::TcpListener::bind("127.0.0.1:0").unwrap();
-    let addr = l.local_addr().unwrap();
-
-    let t = thread::spawn(move || {
-        let mut s = l.accept().unwrap().0;
-        let mut b = [0; 1024];
-        let mut amt = 0;
-        while amt < N {
-            amt += s.read(&mut b).unwrap();
-        }
-    });
-
-    let poll = Poll::new().unwrap();
-    let s = TcpStream::connect(&addr).unwrap();
-
-    poll.register(&s, Token(1), Ready::writable(), PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(128);
-
-    let mut h = H { amt: 0, socket: s, shutdown: false };
-    while !h.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            assert_eq!(event.token(), Token(1));
-            let b = [0; 1024];
-            loop {
-                if let Some(amt) = h.socket.try_write(&b).unwrap() {
-                    h.amt += amt;
-                } else {
-                    break
-                }
-                if h.amt >= N {
-                    h.shutdown = true;
-                    break
-                }
-            }
-        }
-    }
-    t.join().unwrap();
-}
-
-#[test]
-fn write_bufs() {
-    const N: usize = 16 * 1024 * 1024;
-
-    let l = net::TcpListener::bind("127.0.0.1:0").unwrap();
-    let addr = l.local_addr().unwrap();
-
-    let t = thread::spawn(move || {
-        let mut s = l.accept().unwrap().0;
-        let mut b = [0; 1024];
-        let mut amt = 0;
-        while amt < N {
-            for byte in b.iter_mut() {
-                *byte = 0;
-            }
-            let n = s.read(&mut b).unwrap();
-            amt += n;
-            for byte in b[..n].iter() {
-                assert_eq!(*byte, 1);
-            }
-        }
-    });
-
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(128);
-    let s = TcpStream::connect(&addr).unwrap();
-    poll.register(&s, Token(1), Ready::writable(), PollOpt::level()).unwrap();
-
-    let b1 = &[1; 10][..];
-    let b2 = &[1; 383][..];
-    let b3 = &[1; 28][..];
-    let b4 = &[1; 8][..];
-    let b5 = &[1; 128][..];
-    let b: [&IoVec; 5] = [
-        b1.into(),
-        b2.into(),
-        b3.into(),
-        b4.into(),
-        b5.into(),
-    ];
-
-    let mut so_far = 0;
-    while so_far < N {
-        poll.poll(&mut events, None).unwrap();
-
-        match s.write_bufs(&b) {
-            Ok(n) => so_far += n,
-            Err(e) => assert_eq!(e.kind(), io::ErrorKind::WouldBlock),
-        }
-    }
-
-    t.join().unwrap();
-}
-
-#[test]
-fn connect_then_close() {
-    struct H { listener: TcpListener, shutdown: bool }
-
-    let poll = Poll::new().unwrap();
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-    let s = TcpStream::connect(&l.local_addr().unwrap()).unwrap();
-
-    poll.register(&l, Token(1), Ready::readable(), PollOpt::edge()).unwrap();
-    poll.register(&s, Token(2), Ready::readable(), PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(128);
-
-    let mut h = H { listener: l, shutdown: false };
-    while !h.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            if event.token() == Token(1) {
-                let s = h.listener.accept().unwrap().0;
-                poll.register(&s, Token(3), Ready::readable() | Ready::writable(),
-                                        PollOpt::edge()).unwrap();
-                drop(s);
-            } else if event.token() == Token(2) {
-                h.shutdown = true;
-            }
-        }
-    }
-}
-
-#[test]
-fn listen_then_close() {
-    let poll = Poll::new().unwrap();
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-
-    poll.register(&l, Token(1), Ready::readable(), PollOpt::edge()).unwrap();
-    drop(l);
-
-    let mut events = Events::with_capacity(128);
-
-    poll.poll(&mut events, Some(Duration::from_millis(100))).unwrap();
-
-    for event in &events {
-        if event.token() == Token(1) {
-            panic!("recieved ready() on a closed TcpListener")
-        }
-    }
-}
-
-fn assert_send<T: Send>() {
-}
-
-fn assert_sync<T: Sync>() {
-}
-
-#[test]
-fn test_tcp_sockets_are_send() {
-    assert_send::<TcpListener>();
-    assert_send::<TcpStream>();
-    assert_sync::<TcpListener>();
-    assert_sync::<TcpStream>();
-}
-
-#[test]
-fn bind_twice_bad() {
-    let l1 = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-    let addr = l1.local_addr().unwrap();
-    assert!(TcpListener::bind(&addr).is_err());
-}
-
-#[test]
-fn multiple_writes_immediate_success() {
-    const N: usize = 16;
-    let l = net::TcpListener::bind("127.0.0.1:0").unwrap();
-    let addr = l.local_addr().unwrap();
-
-    let t = thread::spawn(move || {
-        let mut s = l.accept().unwrap().0;
-        let mut b = [0; 1024];
-        let mut amt = 0;
-        while amt < 1024*N {
-            for byte in b.iter_mut() {
-                *byte = 0;
-            }
-            let n = s.read(&mut b).unwrap();
-            amt += n;
-            for byte in b[..n].iter() {
-                assert_eq!(*byte, 1);
-            }
-        }
-    });
-
-    let poll = Poll::new().unwrap();
-    let mut s = TcpStream::connect(&addr).unwrap();
-    poll.register(&s, Token(1), Ready::writable(), PollOpt::level()).unwrap();
-    let mut events = Events::with_capacity(16);
-
-    // Wait for our TCP stream to connect
-    'outer: loop {
-        poll.poll(&mut events, None).unwrap();
-        for event in events.iter() {
-            if event.token() == Token(1) && event.readiness().is_writable() {
-                break 'outer
-            }
-        }
-    }
-
-    for _ in 0..N {
-        s.write_all(&[1; 1024]).unwrap();
-    }
-
-    t.join().unwrap();
-}
-
-#[test]
-fn connection_reset_by_peer() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(16);
-    let mut buf = [0u8; 16];
-
-    // Create listener
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-    let addr = l.local_addr().unwrap();
-
-    // Connect client
-    let client = net2::TcpBuilder::new_v4().unwrap()
-        .to_tcp_stream().unwrap();
-
-    client.set_linger(Some(Duration::from_millis(0))).unwrap();
-    client.connect(&addr).unwrap();
-
-    // Convert to Mio stream
-    let client = TcpStream::from_stream(client).unwrap();
-
-    // Register server
-    poll.register(&l, Token(0), Ready::readable(), PollOpt::edge()).unwrap();
-
-    // Register interest in the client
-    poll.register(&client, Token(1), Ready::readable() | Ready::writable(), PollOpt::edge()).unwrap();
-
-    // Wait for listener to be ready
-    let mut server;
-    'outer:
-    loop {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            if event.token() == Token(0) {
-                match l.accept() {
-                    Ok((sock, _)) => {
-                        server = sock;
-                        break 'outer;
-                    }
-                    Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {}
-                    Err(e) => panic!("unexpected error {:?}", e),
-                }
-            }
-        }
-    }
-
-    // Close the connection
-    drop(client);
-
-    // Wait a moment
-    thread::sleep(Duration::from_millis(100));
-
-    // Register interest in the server socket
-    poll.register(&server, Token(3), Ready::readable(), PollOpt::edge()).unwrap();
-
-
-    loop {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            if event.token() == Token(3) {
-                assert!(event.readiness().is_readable());
-
-                match server.read(&mut buf) {
-                    Ok(0) |
-                    Err(_) => {},
-
-                    Ok(x) => panic!("expected empty buffer but read {} bytes", x),
-                }
-                return;
-            }
-        }
-    }
-
-}
-
-#[test]
-#[cfg_attr(target_os = "fuchsia", ignore)]
-fn connect_error() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(16);
-
-    // Pick a "random" port that shouldn't be in use.
-    let l = match TcpStream::connect(&"127.0.0.1:38381".parse().unwrap()) {
-        Ok(l) => l,
-        Err(ref e) if e.kind() == io::ErrorKind::ConnectionRefused => {
-            // Connection failed synchronously.  This is not a bug, but it
-            // unfortunately doesn't get us the code coverage we want.
-            return;
-        },
-        Err(e) => panic!("TcpStream::connect unexpected error {:?}", e)
-    };
-
-    poll.register(&l, Token(0), Ready::writable(), PollOpt::edge()).unwrap();
-
-    'outer:
-    loop {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            if event.token() == Token(0) {
-                assert!(event.readiness().is_writable());
-                break 'outer
-            }
-        }
-    }
-
-    assert!(l.take_error().unwrap().is_some());
-}
-
-#[test]
-fn write_error() {
-    let poll = Poll::new().unwrap();
-    let mut events = Events::with_capacity(16);
-    let (tx, rx) = channel();
-
-    let listener = net::TcpListener::bind("127.0.0.1:0").unwrap();
-    let addr = listener.local_addr().unwrap();
-    let t = thread::spawn(move || {
-        let (conn, _addr) = listener.accept().unwrap();
-        rx.recv().unwrap();
-        drop(conn);
-    });
-
-    let mut s = TcpStream::connect(&addr).unwrap();
-    poll.register(&s,
-                  Token(0),
-                  Ready::readable() | Ready::writable(),
-                  PollOpt::edge()).unwrap();
-
-    let mut wait_writable = || {
-        'outer:
-        loop {
-            poll.poll(&mut events, None).unwrap();
-
-            for event in &events {
-                if event.token() == Token(0) && event.readiness().is_writable() {
-                    break 'outer
-                }
-            }
-        }
-    };
-
-    wait_writable();
-
-    tx.send(()).unwrap();
-    t.join().unwrap();
-
-    let buf = [0; 1024];
-    loop {
-        match s.write(&buf) {
-            Ok(_) => {}
-            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
-                wait_writable()
-            }
-            Err(e) => {
-                println!("good error: {}", e);
-                break
-            }
-        }
-    }
-}

test/test_tcp_level.rs

@@ -1,142 +0,0 @@
-use {expect_events, sleep_ms, TryRead};
-use mio::{Events, Poll, PollOpt, Ready, Token};
-use mio::event::Event;
-use mio::net::{TcpListener, TcpStream};
-use std::io::Write;
-use std::time::Duration;
-
-const MS: u64 = 1_000;
-
-#[test]
-pub fn test_tcp_listener_level_triggered() {
-    let poll = Poll::new().unwrap();
-    let mut pevents = Events::with_capacity(1024);
-
-    // Create the listener
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-
-    // Register the listener with `Poll`
-    poll.register(&l, Token(0), Ready::readable(), PollOpt::level()).unwrap();
-
-    let s1 = TcpStream::connect(&l.local_addr().unwrap()).unwrap();
-    poll.register(&s1, Token(1), Ready::readable(), PollOpt::edge()).unwrap();
-
-    while filter(&pevents, Token(0)).is_empty() {
-        poll.poll(&mut pevents, Some(Duration::from_millis(MS))).unwrap();
-    }
-    let events = filter(&pevents, Token(0));
-
-    assert_eq!(events.len(), 1);
-    assert_eq!(events[0], Event::new(Ready::readable(), Token(0)));
-
-    poll.poll(&mut pevents, Some(Duration::from_millis(MS))).unwrap();
-    let events = filter(&pevents, Token(0));
-    assert_eq!(events.len(), 1);
-    assert_eq!(events[0], Event::new(Ready::readable(), Token(0)));
-
-    // Accept the connection then test that the events stop
-    let _ = l.accept().unwrap();
-
-    poll.poll(&mut pevents, Some(Duration::from_millis(MS))).unwrap();
-    let events = filter(&pevents, Token(0));
-    assert!(events.is_empty(), "actual={:?}", events);
-
-    let s3 = TcpStream::connect(&l.local_addr().unwrap()).unwrap();
-    poll.register(&s3, Token(2), Ready::readable(), PollOpt::edge()).unwrap();
-
-    while filter(&pevents, Token(0)).is_empty() {
-        poll.poll(&mut pevents, Some(Duration::from_millis(MS))).unwrap();
-    }
-    let events = filter(&pevents, Token(0));
-
-    assert_eq!(events.len(), 1);
-    assert_eq!(events[0], Event::new(Ready::readable(), Token(0)));
-
-    drop(l);
-
-    poll.poll(&mut pevents, Some(Duration::from_millis(MS))).unwrap();
-    let events = filter(&pevents, Token(0));
-    assert!(events.is_empty());
-}
-
-#[test]
-pub fn test_tcp_stream_level_triggered() {
-    drop(::env_logger::init());
-    let poll = Poll::new().unwrap();
-    let mut pevents = Events::with_capacity(1024);
-
-    // Create the listener
-    let l = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-
-    // Register the listener with `Poll`
-    poll.register(&l, Token(0), Ready::readable(), PollOpt::edge()).unwrap();
-
-    let mut s1 = TcpStream::connect(&l.local_addr().unwrap()).unwrap();
-    poll.register(&s1, Token(1), Ready::readable() | Ready::writable(), PollOpt::level()).unwrap();
-
-    // Sleep a bit to ensure it arrives at dest
-    sleep_ms(250);
-
-    expect_events(&poll, &mut pevents, 2, vec![
-        Event::new(Ready::readable(), Token(0)),
-        Event::new(Ready::writable(), Token(1)),
-    ]);
-
-    // Server side of socket
-    let (mut s1_tx, _) = l.accept().unwrap();
-
-    // Sleep a bit to ensure it arrives at dest
-    sleep_ms(250);
-
-    expect_events(&poll, &mut pevents, 2, vec![
-        Event::new(Ready::writable(), Token(1))
-    ]);
-
-    // Register the socket
-    poll.register(&s1_tx, Token(123), Ready::readable(), PollOpt::edge()).unwrap();
-
-    debug!("writing some data ----------");
-
-    // Write some data
-    let res = s1_tx.write(b"hello world!");
-    assert!(res.unwrap() > 0);
-
-    // Sleep a bit to ensure it arrives at dest
-    sleep_ms(250);
-
-    debug!("looking at rx end ----------");
-
-    // Poll rx end
-    expect_events(&poll, &mut pevents, 2, vec![
-        Event::new(Ready::readable(), Token(1))
-    ]);
-
-    debug!("reading ----------");
-
-    // Reading the data should clear it
-    let mut res = vec![];
-    while s1.try_read_buf(&mut res).unwrap().is_some() {
-    }
-
-    assert_eq!(res, b"hello world!");
-
-    debug!("checking just read ----------");
-
-    expect_events(&poll, &mut pevents, 1, vec![
-        Event::new(Ready::writable(), Token(1))]);
-
-    // Closing the socket clears all active level events
-    drop(s1);
-
-    debug!("checking everything is gone ----------");
-
-    poll.poll(&mut pevents, Some(Duration::from_millis(MS))).unwrap();
-    let events = filter(&pevents, Token(1));
-    assert!(events.is_empty());
-}
-
-fn filter(events: &Events, token: Token) -> Vec<Event> {
-    (0..events.len()).map(|i| events.get(i).unwrap())
-                     .filter(|e| e.token() == token)
-                     .collect()
-}

test/test_tcp_shutdown.rs

@@ -1,73 +0,0 @@
-use std::net::Shutdown;
-use std::time::Duration;
-
-use mio::{Token, Ready, PollOpt, Poll, Events};
-use mio::net::TcpStream;
-
-macro_rules! wait {
-    ($poll:ident, $ready:ident) => {{
-        use std::time::Instant;
-
-        let now = Instant::now();
-        let mut events = Events::with_capacity(16);
-        let mut found = false;
-
-        while !found {
-            if now.elapsed() > Duration::from_secs(5) {
-                panic!("not ready");
-            }
-
-            $poll.poll(&mut events, Some(Duration::from_secs(1))).unwrap();
-
-            for event in &events {
-                #[cfg(unix)]
-                {
-                    use mio::unix::UnixReady;
-                    assert!(!UnixReady::from(event.readiness()).is_hup());
-                }
-
-                if event.token() == Token(0) && event.readiness().$ready() {
-                    found = true;
-                    break;
-                }
-            }
-        }
-    }};
-}
-
-#[test]
-fn test_write_shutdown() {
-    let poll = Poll::new().unwrap();
-
-    let listener = std::net::TcpListener::bind("127.0.0.1:0").unwrap();
-    let addr = listener.local_addr().unwrap();
-
-    let mut ready = Ready::readable() | Ready::writable();
-
-    #[cfg(unix)]
-    {
-        ready |= mio::unix::UnixReady::hup();
-    }
-
-    let client = TcpStream::connect(&addr).unwrap();
-    poll.register(&client,
-                  Token(0),
-                  ready,
-                  PollOpt::edge()).unwrap();
-
-    let (socket, _) = listener.accept().unwrap();
-
-    wait!(poll, is_writable);
-
-    let mut events = Events::with_capacity(16);
-
-    // Polling should not have any events
-    poll.poll(&mut events, Some(Duration::from_millis(100))).unwrap();
-    assert!(events.iter().next().is_none());
-
-    println!("SHUTTING DOWN");
-    // Now, shutdown the write half of the socket.
-    socket.shutdown(Shutdown::Write).unwrap();
-
-    wait!(poll, is_readable);
-}

test/test_tick.rs

@@ -1,64 +0,0 @@
-use mio::*;
-use mio::deprecated::{EventLoop, Handler};
-use mio::net::{TcpListener, TcpStream};
-use {sleep_ms};
-
-struct TestHandler {
-    tick: usize,
-    state: usize,
-}
-
-impl TestHandler {
-    fn new() -> TestHandler {
-        TestHandler {
-            tick: 0,
-            state: 0,
-        }
-    }
-}
-
-impl Handler for TestHandler {
-    type Timeout = usize;
-    type Message = String;
-
-    fn tick(&mut self, _event_loop: &mut EventLoop<TestHandler>) {
-        debug!("Handler::tick()");
-        self.tick += 1;
-
-        assert_eq!(self.state, 1);
-        self.state = 0;
-    }
-
-    fn ready(&mut self, _event_loop: &mut EventLoop<TestHandler>, token: Token, events: Ready) {
-        debug!("READY: {:?} - {:?}", token, events);
-        if events.is_readable() {
-            debug!("Handler::ready() readable event");
-            assert_eq!(token, Token(0));
-            assert_eq!(self.state, 0);
-            self.state = 1;
-        }
-    }
-}
-
-#[test]
-pub fn test_tick() {
-    debug!("Starting TEST_TICK");
-    let mut event_loop = EventLoop::new().expect("Couldn't make event loop");
-
-    let listener = TcpListener::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-    event_loop.register(&listener, Token(0), Ready::readable(), PollOpt::level()).unwrap();
-
-    let client = TcpStream::connect(&listener.local_addr().unwrap()).unwrap();
-    event_loop.register(&client, Token(1), Ready::readable(), PollOpt::edge()).unwrap();
-
-    sleep_ms(250);
-
-    let mut handler = TestHandler::new();
-
-    for _ in 0..2 {
-        event_loop.run_once(&mut handler, None).unwrap();
-    }
-
-    assert!(handler.tick == 2, "actual={}", handler.tick);
-    assert!(handler.state == 0, "actual={}", handler.state);
-}

test/test_udp_level.rs

@@ -1,52 +0,0 @@
-use mio::{Events, Poll, PollOpt, Ready, Token};
-use mio::event::Event;
-use mio::net::UdpSocket;
-use {expect_events, sleep_ms};
-
-#[test]
-pub fn test_udp_level_triggered() {
-    let poll = Poll::new().unwrap();
-    let poll = &poll;
-    let mut events = Events::with_capacity(1024);
-    let events = &mut events;
-
-    // Create the listener
-    let tx = UdpSocket::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-    let rx = UdpSocket::bind(&"127.0.0.1:0".parse().unwrap()).unwrap();
-
-    poll.register(&tx, Token(0), Ready::readable() | Ready::writable(), PollOpt::level()).unwrap();
-    poll.register(&rx, Token(1), Ready::readable() | Ready::writable(), PollOpt::level()).unwrap();
-
-
-    for _ in 0..2 {
-        expect_events(poll, events, 2, vec![
-            Event::new(Ready::writable(), Token(0)),
-            Event::new(Ready::writable(), Token(1)),
-        ]);
-    }
-
-    tx.send_to(b"hello world!", &rx.local_addr().unwrap()).unwrap();
-
-    sleep_ms(250);
-
-    for _ in 0..2 {
-        expect_events(poll, events, 2, vec![
-            Event::new(Ready::readable() | Ready::writable(), Token(1))
-        ]);
-    }
-
-    let mut buf = [0; 200];
-    while rx.recv_from(&mut buf).is_ok() {}
-
-    for _ in 0..2 {
-        expect_events(poll, events, 4, vec![Event::new(Ready::writable(), Token(1))]);
-    }
-
-    tx.send_to(b"hello world!", &rx.local_addr().unwrap()).unwrap();
-    sleep_ms(250);
-
-    expect_events(poll, events, 10,
-                  vec![Event::new(Ready::readable() | Ready::writable(), Token(1))]);
-
-    drop(rx);
-}

test/test_udp_socket.rs

@@ -1,252 +0,0 @@
-use mio::{Events, Poll, PollOpt, Ready, Token};
-use mio::net::UdpSocket;
-use bytes::{Buf, RingBuf, SliceBuf, MutBuf};
-use std::io::ErrorKind;
-use std::str;
-use std::time;
-use localhost;
-use iovec::IoVec;
-
-const LISTENER: Token = Token(0);
-const SENDER: Token = Token(1);
-
-pub struct UdpHandlerSendRecv {
-    tx: UdpSocket,
-    rx: UdpSocket,
-    msg: &'static str,
-    buf: SliceBuf<'static>,
-    rx_buf: RingBuf,
-    connected: bool,
-    shutdown: bool,
-}
-
-impl UdpHandlerSendRecv {
-    fn new(tx: UdpSocket, rx: UdpSocket, connected: bool, msg : &'static str) -> UdpHandlerSendRecv {
-        UdpHandlerSendRecv {
-            tx,
-            rx,
-            msg,
-            buf: SliceBuf::wrap(msg.as_bytes()),
-            rx_buf: RingBuf::new(1024),
-            connected,
-            shutdown: false,
-        }
-    }
-}
-
-fn assert_send<T: Send>() {
-}
-
-fn assert_sync<T: Sync>() {
-}
-
-#[cfg(test)]
-fn test_send_recv_udp(tx: UdpSocket, rx: UdpSocket, connected: bool) {
-    debug!("Starting TEST_UDP_SOCKETS");
-    let poll = Poll::new().unwrap();
-
-    assert_send::<UdpSocket>();
-    assert_sync::<UdpSocket>();
-
-    // ensure that the sockets are non-blocking
-    let mut buf = [0; 128];
-    assert_eq!(ErrorKind::WouldBlock, rx.recv_from(&mut buf).unwrap_err().kind());
-
-    info!("Registering SENDER");
-    poll.register(&tx, SENDER, Ready::writable(), PollOpt::edge()).unwrap();
-
-    info!("Registering LISTENER");
-    poll.register(&rx, LISTENER, Ready::readable(), PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(1024);
-
-    info!("Starting event loop to test with...");
-    let mut handler = UdpHandlerSendRecv::new(tx, rx, connected, "hello world");
-
-    while !handler.shutdown {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            if event.readiness().is_readable() {
-                if let LISTENER = event.token() {
-                    debug!("We are receiving a datagram now...");
-                    let cnt = unsafe {
-                        if !handler.connected {
-                            handler.rx.recv_from(handler.rx_buf.mut_bytes()).unwrap().0
-                        } else {
-                            handler.rx.recv(handler.rx_buf.mut_bytes()).unwrap()
-                        }
-                    };
-
-                    unsafe { MutBuf::advance(&mut handler.rx_buf, cnt); }
-                    assert!(str::from_utf8(handler.rx_buf.bytes()).unwrap() == handler.msg);
-                    handler.shutdown = true;
-                }
-            }
-
-            if event.readiness().is_writable() {
-                if let SENDER = event.token() {
-                    let cnt = if !handler.connected {
-                        let addr = handler.rx.local_addr().unwrap();
-                        handler.tx.send_to(handler.buf.bytes(), &addr).unwrap()
-                    } else {
-                        handler.tx.send(handler.buf.bytes()).unwrap()
-                    };
-
-                    handler.buf.advance(cnt);
-                }
-            }
-        }
-    }
-}
-
-/// Returns the sender and the receiver
-fn connected_sockets() -> (UdpSocket, UdpSocket) {
-    let addr = localhost();
-    let any = localhost();
-
-    let tx = UdpSocket::bind(&any).unwrap();
-    let rx = UdpSocket::bind(&addr).unwrap();
-
-    let tx_addr = tx.local_addr().unwrap();
-    let rx_addr = rx.local_addr().unwrap();
-
-    assert!(tx.connect(rx_addr).is_ok());
-    assert!(rx.connect(tx_addr).is_ok());
-
-    (tx, rx)
-}
-
-#[test]
-pub fn test_udp_socket() {
-    let addr = localhost();
-    let any = localhost();
-
-    let tx = UdpSocket::bind(&any).unwrap();
-    let rx = UdpSocket::bind(&addr).unwrap();
-
-    test_send_recv_udp(tx, rx, false);
-}
-
-#[test]
-pub fn test_udp_socket_send_recv() {
-    let (tx, rx) = connected_sockets();
-
-    test_send_recv_udp(tx, rx, true);
-}
-
-#[test]
-pub fn test_udp_socket_discard() {
-    let addr = localhost();
-    let any = localhost();
-    let outside = localhost();
-
-    let tx = UdpSocket::bind(&any).unwrap();
-    let rx = UdpSocket::bind(&addr).unwrap();
-    let udp_outside = UdpSocket::bind(&outside).unwrap();
-
-    let tx_addr = tx.local_addr().unwrap();
-    let rx_addr = rx.local_addr().unwrap();
-
-    assert!(tx.connect(rx_addr).is_ok());
-    assert!(udp_outside.connect(rx_addr).is_ok());
-    assert!(rx.connect(tx_addr).is_ok());
-
-    let poll = Poll::new().unwrap();
-
-    let r = udp_outside.send(b"hello world");
-    assert!(r.is_ok() || r.unwrap_err().kind() == ErrorKind::WouldBlock);
-
-    poll.register(&rx, LISTENER, Ready::readable(), PollOpt::edge()).unwrap();
-    poll.register(&tx, SENDER, Ready::writable(), PollOpt::edge()).unwrap();
-
-    let mut events = Events::with_capacity(1024);
-
-    poll.poll(&mut events, Some(time::Duration::from_secs(5))).unwrap();
-
-    for event in &events {
-        if event.readiness().is_readable() {
-            if let LISTENER = event.token() {
-                assert!(false, "Expected to no receive a packet but got something")
-            }
-        }
-    }
-}
-
-#[cfg(all(unix, not(target_os = "fuchsia")))]
-#[test]
-pub fn test_udp_socket_send_recv_bufs() {
-    let (tx, rx) = connected_sockets();
-
-    let poll = Poll::new().unwrap();
-
-    poll.register(&tx, SENDER, Ready::writable(), PollOpt::edge())
-        .unwrap();
-
-    poll.register(&rx, LISTENER, Ready::readable(), PollOpt::edge())
-        .unwrap();
-
-    let mut events = Events::with_capacity(1024);
-
-    let data = b"hello, world";
-    let write_bufs: Vec<_> = vec![b"hello, " as &[u8], b"world"]
-        .into_iter()
-        .flat_map(IoVec::from_bytes)
-        .collect();
-    let (a, b, c) = (
-        &mut [0u8; 4] as &mut [u8],
-        &mut [0u8; 6] as &mut [u8],
-        &mut [0u8; 8] as &mut [u8],
-    );
-    let mut read_bufs: Vec<_> = vec![a, b, c]
-        .into_iter()
-        .flat_map(IoVec::from_bytes_mut)
-        .collect();
-
-    let times = 5;
-    let mut rtimes = 0;
-    let mut wtimes = 0;
-
-    'outer: loop {
-        poll.poll(&mut events, None).unwrap();
-
-        for event in &events {
-            if event.readiness().is_readable() {
-                if let LISTENER = event.token() {
-                    loop {
-                        let cnt = match rx.recv_bufs(read_bufs.as_mut()) {
-                            Ok(cnt) => cnt,
-                            Err(ref e) if e.kind() == ErrorKind::WouldBlock => break,
-                            Err(e) => panic!("read error {}", e),
-                        };
-                        assert_eq!(cnt, data.len());
-                        let res: Vec<u8> = read_bufs
-                            .iter()
-                            .flat_map(|buf| buf.iter())
-                            .cloned()
-                            .collect();
-                        assert_eq!(&res[..cnt], &data[..cnt]);
-                        rtimes += 1;
-                        if rtimes == times {
-                            break 'outer;
-                        }
-                    }
-                }
-            }
-
-            if event.readiness().is_writable() {
-                if let SENDER = event.token() {
-                    while wtimes < times {
-                        let cnt = match tx.send_bufs(write_bufs.as_slice()) {
-                            Ok(cnt) => cnt,
-                            Err(ref e) if e.kind() == ErrorKind::WouldBlock => break,
-                            Err(e) => panic!("write error {}", e),
-                        };
-                        assert_eq!(cnt, data.len());
-                        wtimes += 1;
-                    }
-                }
-            }
-        }
-    }
-}

test/test_uds_shutdown.rs

@@ -1,300 +0,0 @@
-use {TryRead, TryWrite};
-use mio::*;
-use mio::deprecated::{EventLoop, Handler};
-use mio::deprecated::unix::*;
-use bytes::{Buf, ByteBuf, MutByteBuf, SliceBuf};
-use slab::Slab;
-use std::io;
-use std::path::PathBuf;
-use tempdir::TempDir;
-
-const SERVER: Token = Token(10_000_000);
-const CLIENT: Token = Token(10_000_001);
-
-struct EchoConn {
-    sock: UnixStream,
-    buf: Option<ByteBuf>,
-    mut_buf: Option<MutByteBuf>,
-    token: Option<Token>,
-    interest: Ready
-}
-
-impl EchoConn {
-    fn new(sock: UnixStream) -> EchoConn {
-        EchoConn {
-            sock: sock,
-            buf: None,
-            mut_buf: Some(ByteBuf::mut_with_capacity(2048)),
-            token: None,
-            interest: Ready::hup()
-        }
-    }
-
-    fn writable(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        let mut buf = self.buf.take().unwrap();
-
-        match self.sock.try_write_buf(&mut buf) {
-            Ok(None) => {
-                debug!("client flushing buf; WOULDBLOCK");
-
-                self.buf = Some(buf);
-                self.interest.insert(Ready::writable());
-            }
-            Ok(Some(r)) => {
-                debug!("CONN : we wrote {} bytes!", r);
-
-                self.mut_buf = Some(buf.flip());
-
-                self.interest.insert(Ready::readable());
-                self.interest.remove(Ready::writable());
-                match self.sock.shutdown(Shutdown::Write) {
-                   Err(e) => panic!(e),
-                   _ => {},
-                }
-            }
-            Err(e) => debug!("not implemented; client err={:?}", e),
-        }
-
-        event_loop.reregister(&self.sock, self.token.unwrap(), self.interest,
-                              PollOpt::edge() | PollOpt::oneshot())
-    }
-
-    fn readable(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        let mut buf = self.mut_buf.take().unwrap();
-
-        match self.sock.try_read_buf(&mut buf) {
-            Ok(None) => {
-                debug!("CONN : spurious read wakeup");
-                self.mut_buf = Some(buf);
-            }
-            Ok(Some(r)) => {
-                debug!("CONN : we read {} bytes!", r);
-
-                // prepare to provide this to writable
-                self.buf = Some(buf.flip());
-
-                self.interest.remove(Ready::readable());
-                self.interest.insert(Ready::writable());
-            }
-            Err(e) => {
-                debug!("not implemented; client err={:?}", e);
-                self.interest.remove(Ready::readable());
-            }
-
-        };
-
-        event_loop.reregister(&self.sock, self.token.unwrap(), self.interest,
-                              PollOpt::edge())
-    }
-}
-
-struct EchoServer {
-    sock: UnixListener,
-    conns: Slab<EchoConn>
-}
-
-impl EchoServer {
-    fn accept(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        debug!("server accepting socket");
-
-        let sock = self.sock.accept().unwrap();
-        let conn = EchoConn::new(sock,);
-        let tok = self.conns.insert(conn);
-
-        // Register the connection
-        self.conns[tok].token = Some(Token(tok));
-        event_loop.register(&self.conns[tok].sock, Token(tok), Ready::readable(),
-                                PollOpt::edge() | PollOpt::oneshot())
-            .expect("could not register socket with event loop");
-
-        Ok(())
-    }
-
-    fn conn_readable(&mut self, event_loop: &mut EventLoop<Echo>,
-                     tok: Token) -> io::Result<()> {
-        debug!("server conn readable; tok={:?}", tok);
-        self.conn(tok).readable(event_loop)
-    }
-
-    fn conn_writable(&mut self, event_loop: &mut EventLoop<Echo>,
-                     tok: Token) -> io::Result<()> {
-        debug!("server conn writable; tok={:?}", tok);
-        self.conn(tok).writable(event_loop)
-    }
-
-    fn conn<'a>(&'a mut self, tok: Token) -> &'a mut EchoConn {
-        &mut self.conns[tok.into()]
-    }
-}
-
-struct EchoClient {
-    sock: UnixStream,
-    msgs: Vec<&'static str>,
-    tx: SliceBuf<'static>,
-    rx: SliceBuf<'static>,
-    mut_buf: Option<MutByteBuf>,
-    token: Token,
-    interest: Ready
-}
-
-
-// Sends a message and expects to receive the same exact message, one at a time
-impl EchoClient {
-    fn new(sock: UnixStream, tok: Token,  mut msgs: Vec<&'static str>) -> EchoClient {
-        let curr = msgs.remove(0);
-
-        EchoClient {
-            sock: sock,
-            msgs: msgs,
-            tx: SliceBuf::wrap(curr.as_bytes()),
-            rx: SliceBuf::wrap(curr.as_bytes()),
-            mut_buf: Some(ByteBuf::mut_with_capacity(2048)),
-            token: tok,
-            interest: Ready::none()
-        }
-    }
-
-    fn readable(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        debug!("client socket readable");
-
-        let mut buf = self.mut_buf.take().unwrap();
-
-        match self.sock.try_read_buf(&mut buf) {
-            Ok(None) => {
-                debug!("CLIENT : spurious read wakeup");
-                self.mut_buf = Some(buf);
-            }
-            Ok(Some(r)) => {
-                if r == 0 {
-                    self.interest.remove(Ready::readable());
-                     event_loop.shutdown();
-                } else {
-                debug!("CLIENT : We read {} bytes!", r);
-
-                // prepare for reading
-                let mut buf = buf.flip();
-
-                while buf.has_remaining() {
-                    let actual = buf.read_byte().unwrap();
-                    let expect = self.rx.read_byte().unwrap();
-
-                    assert!(actual == expect, "actual={}; expect={}", actual, expect);
-                }
-
-                self.mut_buf = Some(buf.flip());
-                if !self.rx.has_remaining() {
-                    self.next_msg(event_loop).unwrap();
-                }
-                }
-            }
-            Err(e) => {
-                panic!("not implemented; client err={:?}", e);
-            }
-        };
-
-        event_loop.reregister(&self.sock, self.token, self.interest,
-                              PollOpt::edge() | PollOpt::oneshot())
-    }
-
-    fn writable(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        debug!("client socket writable");
-
-        match self.sock.try_write_buf(&mut self.tx) {
-            Ok(None) => {
-                debug!("client flushing buf; WOULDBLOCK");
-                self.interest.insert(Ready::writable());
-            }
-            Ok(Some(r)) => {
-                debug!("CLIENT : we wrote {} bytes!", r);
-                self.interest.insert(Ready::readable());
-                self.interest.remove(Ready::writable());
-            }
-            Err(e) => debug!("not implemented; client err={:?}", e)
-        }
-
-        event_loop.reregister(&self.sock, self.token, self.interest,
-                              PollOpt::edge() | PollOpt::oneshot())
-    }
-
-    fn next_msg(&mut self, event_loop: &mut EventLoop<Echo>) -> io::Result<()> {
-        if self.msgs.is_empty() {
-
-            return Ok(());
-        }
-
-        let curr = self.msgs.remove(0);
-
-        debug!("client prepping next message");
-        self.tx = SliceBuf::wrap(curr.as_bytes());
-        self.rx = SliceBuf::wrap(curr.as_bytes());
-
-        self.interest.insert(Ready::writable());
-        event_loop.reregister(&self.sock, self.token, self.interest,
-                              PollOpt::edge() | PollOpt::oneshot())
-    }
-}
-
-struct Echo {
-    server: EchoServer,
-    client: EchoClient,
-}
-
-impl Echo {
-    fn new(srv: UnixListener, client: UnixStream, msgs: Vec<&'static str>) -> Echo {
-        Echo {
-            server: EchoServer {
-                sock: srv,
-                conns: Slab::with_capacity(128)
-            },
-            client: EchoClient::new(client, CLIENT, msgs)
-        }
-    }
-}
-
-impl Handler for Echo {
-    type Timeout = usize;
-    type Message = ();
-
-    fn ready(&mut self, event_loop: &mut EventLoop<Echo>, token: Token,
-             events: Ready) {
-        debug!("ready {:?} {:?}", token, events);
-        if events.is_readable() {
-            match token {
-                SERVER => self.server.accept(event_loop).unwrap(),
-                CLIENT => self.client.readable(event_loop).unwrap(),
-                i => self.server.conn_readable(event_loop, i).unwrap()
-            }
-        }
-
-        if events.is_writable() {
-            match token {
-                SERVER => panic!("received writable for token 0"),
-                CLIENT => self.client.writable(event_loop).unwrap(),
-                _ => self.server.conn_writable(event_loop, token).unwrap()
-            };
-        }
-    }
-}
-
-#[test]
-pub fn test_echo_server() {
-    debug!("Starting TEST_ECHO_SERVER");
-    let mut event_loop = EventLoop::new().unwrap();
-
-    let tmp_dir = TempDir::new("mio").unwrap();
-    let addr = tmp_dir.path().join(&PathBuf::from("sock"));
-
-    let srv = UnixListener::bind(&addr).unwrap();
-
-    event_loop.register(&srv, SERVER, Ready::readable(),
-                            PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    let sock = UnixStream::connect(&addr).unwrap();
-
-    // Connect to the server
-    event_loop.register(&sock, CLIENT, Ready::writable(),
-                        PollOpt::edge() | PollOpt::oneshot()).unwrap();
-
-    // Start the event loop
-    event_loop.run(&mut Echo::new(srv, sock, vec!["foo", "bar"])).unwrap();
-}