40 lines
1.1 KiB
Swift
40 lines
1.1 KiB
Swift
//
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// Copyright 2019 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import Foundation
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public enum Batching {
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public static let kDefaultBatchSize: UInt = 1000
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// Break loop cycles into batches, releasing stale objects
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// after each batch to avoid out of memory errors.
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//
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// If batchSize == 0, no batching is done and no
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// autoreleasepool is used.
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public static func loop(batchSize: UInt,
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loopBlock: (UnsafeMutablePointer<ObjCBool>) throws -> Void) rethrows {
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var stop: ObjCBool = false
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guard batchSize > 0 else {
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// No batching.
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while !stop.boolValue {
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try loopBlock(&stop)
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}
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return
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}
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// With batching.
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while !stop.boolValue {
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try autoreleasepool {
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for _ in 0..<batchSize {
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guard !stop.boolValue else {
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return
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}
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try loopBlock(&stop)
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}
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}
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}
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}
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}
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