44e0efe0e6
This is intended to make SequencedTaskChecker work for native dispatch queues on iOS and macOS. These labels can be compared by their pointers to determine if a task is running on the same queue. BUG=webrtc:6643 Review-Url: https://codereview.webrtc.org/2464383002 Cr-Commit-Position: refs/heads/master@{#14900}
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/base/sequenced_task_checker_impl.h"
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#if defined(WEBRTC_MAC)
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#include <dispatch/dispatch.h>
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#endif
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#include "webrtc/base/platform_thread.h"
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#include "webrtc/base/sequenced_task_checker.h"
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#include "webrtc/base/task_queue.h"
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namespace rtc {
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SequencedTaskCheckerImpl::SequencedTaskCheckerImpl()
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: attached_(true), valid_queue_(TaskQueue::Current()) {}
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SequencedTaskCheckerImpl::~SequencedTaskCheckerImpl() {}
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bool SequencedTaskCheckerImpl::CalledSequentially() const {
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QueueId current_queue = TaskQueue::Current();
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#if defined(WEBRTC_MAC)
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// If we're not running on a TaskQueue, use the system dispatch queue
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// label as an identifier.
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if (current_queue == nullptr)
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current_queue = dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL);
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#endif
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CritScope scoped_lock(&lock_);
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if (!attached_) { // true if previously detached.
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valid_queue_ = current_queue;
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attached_ = true;
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}
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if (!valid_queue_)
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return thread_checker_.CalledOnValidThread();
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return valid_queue_ == current_queue;
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}
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void SequencedTaskCheckerImpl::Detach() {
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CritScope scoped_lock(&lock_);
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attached_ = false;
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valid_queue_ = nullptr;
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thread_checker_.DetachFromThread();
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}
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namespace internal {
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SequencedTaskCheckerScope::SequencedTaskCheckerScope(
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const SequencedTaskChecker* checker) {
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RTC_DCHECK(checker->CalledSequentially());
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}
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SequencedTaskCheckerScope::~SequencedTaskCheckerScope() {}
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} // namespace internal
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} // namespace rtc
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