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b4c6d1e6d9
This cl allows to overwrite TaskQueue implementation by depending on and setting the global task queue factory. Bug: webrtc:10191 Change-Id: I69ceb139d00078d3be90eeb4e240758b88829c20 Reviewed-on: https://webrtc-review.googlesource.com/c/118060 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26345}
63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
/*
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* Copyright 2019 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 "rtc_base/task_queue.h"
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#include "api/task_queue/global_task_queue_factory.h"
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#include "api/task_queue/task_queue_base.h"
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namespace rtc {
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TaskQueue::TaskQueue(const char* queue_name, Priority priority)
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// For backward compatibility impl_ need to be scoped_refptr<Impl>,
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// But this implementation treat impl_ as
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// std::unique_ptr<webrtc::TaskQueueBase, webrtc::TaskQueueDeleter> abusing
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// fact that both classes are wrappers around raw pointer.
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: impl_(webrtc::GlobalTaskQueueFactory()
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.CreateTaskQueue(queue_name, priority)
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.release()) {
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impl_->task_queue_ = this;
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}
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TaskQueue::~TaskQueue() {
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// TODO(danilchap): change impl_ to webrtc::TaskQueueBase* when dependenent
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// projects stop using link-injection to override task queue and thus do not
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// rely on exact TaskQueue layout.
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// There might running task that tries to rescheduler itself to the TaskQueue
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// and not yet away TaskQueue destructor is called.
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// Calling back to TaskQueue::PostTask need impl_ pointer still be valid, so
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// Start the destruction first, ...
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impl_->Delete();
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// release the pointer later.
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const_cast<rtc::scoped_refptr<Impl>&>(impl_).release();
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}
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// static
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TaskQueue* TaskQueue::Current() {
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webrtc::TaskQueueBase* impl = webrtc::TaskQueueBase::Current();
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if (impl == nullptr) {
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return nullptr;
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}
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return impl->task_queue_;
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}
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bool TaskQueue::IsCurrent() const {
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return Current() == this;
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}
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void TaskQueue::PostTask(std::unique_ptr<QueuedTask> task) {
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return impl_->PostTask(std::move(task));
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}
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void TaskQueue::PostDelayedTask(std::unique_ptr<QueuedTask> task,
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uint32_t milliseconds) {
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return impl_->PostDelayedTask(std::move(task), milliseconds);
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}
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} // namespace rtc
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