| /* |
| * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "rtc_base/sequenced_task_checker_impl.h" |
| |
| #if defined(WEBRTC_MAC) |
| #include <dispatch/dispatch.h> |
| #endif |
| |
| #include "api/task_queue/task_queue_base.h" |
| #include "rtc_base/checks.h" |
| #include "rtc_base/sequenced_task_checker.h" |
| |
| namespace rtc { |
| |
| SequencedTaskCheckerImpl::SequencedTaskCheckerImpl() |
| : attached_(true), valid_queue_(webrtc::TaskQueueBase::Current()) {} |
| |
| SequencedTaskCheckerImpl::~SequencedTaskCheckerImpl() {} |
| |
| bool SequencedTaskCheckerImpl::CalledSequentially() const { |
| QueueId current_queue = webrtc::TaskQueueBase::Current(); |
| #if defined(WEBRTC_MAC) |
| // If we're not running on a TaskQueue, use the system dispatch queue |
| // label as an identifier. |
| if (current_queue == nullptr) |
| current_queue = dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL); |
| #endif |
| CritScope scoped_lock(&lock_); |
| if (!attached_) { // true if previously detached. |
| valid_queue_ = current_queue; |
| attached_ = true; |
| } |
| if (!valid_queue_) |
| return thread_checker_.CalledOnValidThread(); |
| return valid_queue_ == current_queue; |
| } |
| |
| void SequencedTaskCheckerImpl::Detach() { |
| CritScope scoped_lock(&lock_); |
| attached_ = false; |
| valid_queue_ = nullptr; |
| thread_checker_.DetachFromThread(); |
| } |
| |
| namespace internal { |
| |
| SequencedTaskCheckerScope::SequencedTaskCheckerScope( |
| const SequencedTaskChecker* checker) { |
| RTC_DCHECK(checker->CalledSequentially()); |
| } |
| |
| SequencedTaskCheckerScope::~SequencedTaskCheckerScope() {} |
| |
| } // namespace internal |
| } // namespace rtc |