mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-13 13:50:40 +01:00
c374d11fac
Bug: b/235812579 Change-Id: I9fa3dc4a65044df8b44fff4e9bfeac7233fa381c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/266080 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Artem Titov <titovartem@webrtc.org> Cr-Commit-Position: refs/heads/main@{#37248}
111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
/*
|
|
* Copyright 2019 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.
|
|
*/
|
|
|
|
#ifndef API_TASK_QUEUE_TO_QUEUED_TASK_H_
|
|
#define API_TASK_QUEUE_TO_QUEUED_TASK_H_
|
|
|
|
#include <memory>
|
|
#include <type_traits>
|
|
#include <utility>
|
|
|
|
#include "api/task_queue/pending_task_safety_flag.h"
|
|
#include "api/task_queue/queued_task.h"
|
|
|
|
namespace webrtc {
|
|
namespace webrtc_new_closure_impl {
|
|
// Simple implementation of QueuedTask for use with lambdas.
|
|
template <typename Closure>
|
|
class ClosureTask : public QueuedTask {
|
|
public:
|
|
explicit ClosureTask(Closure&& closure)
|
|
: closure_(std::forward<Closure>(closure)) {}
|
|
|
|
private:
|
|
bool Run() override {
|
|
closure_();
|
|
return true;
|
|
}
|
|
|
|
typename std::decay<Closure>::type closure_;
|
|
};
|
|
|
|
template <typename Closure>
|
|
class SafetyClosureTask : public QueuedTask {
|
|
public:
|
|
explicit SafetyClosureTask(rtc::scoped_refptr<PendingTaskSafetyFlag> safety,
|
|
Closure&& closure)
|
|
: closure_(std::forward<Closure>(closure)),
|
|
safety_flag_(std::move(safety)) {}
|
|
|
|
private:
|
|
bool Run() override {
|
|
if (safety_flag_->alive())
|
|
closure_();
|
|
return true;
|
|
}
|
|
|
|
typename std::decay<Closure>::type closure_;
|
|
rtc::scoped_refptr<PendingTaskSafetyFlag> safety_flag_;
|
|
};
|
|
|
|
// Extends ClosureTask to also allow specifying cleanup code.
|
|
// This is useful when using lambdas if guaranteeing cleanup, even if a task
|
|
// was dropped (queue is too full), is required.
|
|
template <typename Closure, typename Cleanup>
|
|
class ClosureTaskWithCleanup : public ClosureTask<Closure> {
|
|
public:
|
|
ClosureTaskWithCleanup(Closure&& closure, Cleanup&& cleanup)
|
|
: ClosureTask<Closure>(std::forward<Closure>(closure)),
|
|
cleanup_(std::forward<Cleanup>(cleanup)) {}
|
|
~ClosureTaskWithCleanup() override { cleanup_(); }
|
|
|
|
private:
|
|
typename std::decay<Cleanup>::type cleanup_;
|
|
};
|
|
} // namespace webrtc_new_closure_impl
|
|
|
|
// Convenience function to construct closures that can be passed directly
|
|
// to methods that support std::unique_ptr<QueuedTask> but not template
|
|
// based parameters.
|
|
template <typename Closure>
|
|
std::unique_ptr<QueuedTask> ToQueuedTask(Closure&& closure) {
|
|
return std::make_unique<webrtc_new_closure_impl::ClosureTask<Closure>>(
|
|
std::forward<Closure>(closure));
|
|
}
|
|
|
|
template <typename Closure>
|
|
std::unique_ptr<QueuedTask> ToQueuedTask(
|
|
rtc::scoped_refptr<PendingTaskSafetyFlag> safety,
|
|
Closure&& closure) {
|
|
return std::make_unique<webrtc_new_closure_impl::SafetyClosureTask<Closure>>(
|
|
std::move(safety), std::forward<Closure>(closure));
|
|
}
|
|
|
|
template <typename Closure>
|
|
std::unique_ptr<QueuedTask> ToQueuedTask(const ScopedTaskSafety& safety,
|
|
Closure&& closure) {
|
|
return ToQueuedTask(safety.flag(), std::forward<Closure>(closure));
|
|
}
|
|
|
|
template <typename Closure,
|
|
typename Cleanup,
|
|
typename std::enable_if<!std::is_same<
|
|
typename std::remove_const<
|
|
typename std::remove_reference<Closure>::type>::type,
|
|
ScopedTaskSafety>::value>::type* = nullptr>
|
|
std::unique_ptr<QueuedTask> ToQueuedTask(Closure&& closure, Cleanup&& cleanup) {
|
|
return std::make_unique<
|
|
webrtc_new_closure_impl::ClosureTaskWithCleanup<Closure, Cleanup>>(
|
|
std::forward<Closure>(closure), std::forward<Cleanup>(cleanup));
|
|
}
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // API_TASK_QUEUE_TO_QUEUED_TASK_H_
|