From bea04f497883f8a93cfee31375becc4d4a7c5093 Mon Sep 17 00:00:00 2001
From: Mike Ash <mike@mikeash.com>
Date: Fri, 22 Feb 2013 17:36:57 -0500
Subject: [PATCH] Fix deadlock from trying to do a dispatch_sync on the main
 queue when already on the main thread

---
 AFNetworking/AFHTTPClient.m | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/AFNetworking/AFHTTPClient.m b/AFNetworking/AFHTTPClient.m
index 07e813d..58123bc 100644
--- a/AFNetworking/AFHTTPClient.m
+++ b/AFNetworking/AFHTTPClient.m
@@ -993,9 +993,14 @@ static const NSUInteger AFMultipartBodyStreamProviderBufferSize = 4096;
         _outputStream = CFBridgingRelease(writeStream);
         
         _outputStream.delegate = self;
-        dispatch_sync(dispatch_get_main_queue(), ^{
+        if([NSThread isMainThread]) {
             [_outputStream scheduleInRunLoop: [NSRunLoop currentRunLoop] forMode: NSDefaultRunLoopMode];
-        });
+        }
+        else {
+            dispatch_sync(dispatch_get_main_queue(), ^{
+                [_outputStream scheduleInRunLoop: [NSRunLoop currentRunLoop] forMode: NSDefaultRunLoopMode];
+            });
+        }
         [_outputStream open];
         _keepalive = self;
     }