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d0ba092a77
* Convert the codebase to Objective-C++ throughout. One language is better than two. * Put it back * Fix linker * Point explicitly to updated Weaver to unblock build * Revert "Point explicitly to updated Weaver to unblock build" This reverts commit fdc25296e8794d4e6e56c35f5fe6da2be3f71dbc. * Revert "Fix linker" This reverts commit 7be25f91519b8497ef42de79f115bcfbdb965c39. * Add in the frameworks * no message * Address spec lint warnings * Fix tvos build * Put that back * Address Michael's review * Add comment to kick CI
58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
//
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// ASDispatch.mm
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// Texture
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//
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// Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import <AsyncDisplayKit/ASDispatch.h>
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// Prefer C atomics in this file because ObjC blocks can't capture C++ atomics well.
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#import <stdatomic.h>
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/**
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* Like dispatch_apply, but you can set the thread count. 0 means 2*active CPUs.
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*
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* Note: The actual number of threads may be lower than threadCount, if libdispatch
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* decides the system can't handle it. In reality this rarely happens.
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*/
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void ASDispatchApply(size_t iterationCount, dispatch_queue_t queue, NSUInteger threadCount, NS_NOESCAPE void(^work)(size_t i)) {
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if (threadCount == 0) {
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threadCount = NSProcessInfo.processInfo.activeProcessorCount * 2;
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}
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dispatch_group_t group = dispatch_group_create();
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__block atomic_size_t counter = ATOMIC_VAR_INIT(0);
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for (NSUInteger t = 0; t < threadCount; t++) {
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dispatch_group_async(group, queue, ^{
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size_t i;
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while ((i = atomic_fetch_add(&counter, 1)) < iterationCount) {
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work(i);
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}
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});
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}
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dispatch_group_wait(group, DISPATCH_TIME_FOREVER);
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};
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/**
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* Like dispatch_async, but you can set the thread count. 0 means 2*active CPUs.
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*
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* Note: The actual number of threads may be lower than threadCount, if libdispatch
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* decides the system can't handle it. In reality this rarely happens.
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*/
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void ASDispatchAsync(size_t iterationCount, dispatch_queue_t queue, NSUInteger threadCount, NS_NOESCAPE void(^work)(size_t i)) {
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if (threadCount == 0) {
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threadCount = NSProcessInfo.processInfo.activeProcessorCount * 2;
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}
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__block atomic_size_t counter = ATOMIC_VAR_INIT(0);
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for (NSUInteger t = 0; t < threadCount; t++) {
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dispatch_async(queue, ^{
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size_t i;
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while ((i = atomic_fetch_add(&counter, 1)) < iterationCount) {
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work(i);
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}
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});
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}
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};
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