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// Copyright 2013 the V8 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.
#ifndef V8_LIBPLATFORM_TASK_QUEUE_H_
#define V8_LIBPLATFORM_TASK_QUEUE_H_
#include <memory>
#include <queue>
#include "include/libplatform/libplatform-export.h"
#include "src/base/macros.h"
#include "src/base/platform/mutex.h"
#include "src/base/platform/semaphore.h"
#include "testing/gtest/include/gtest/gtest_prod.h" // nogncheck
namespace v8 {
class Task;
namespace platform {
class V8_PLATFORM_EXPORT TaskQueue {
public:
TaskQueue();
~TaskQueue();
TaskQueue(const TaskQueue&) = delete;
TaskQueue& operator=(const TaskQueue&) = delete;
// Appends a task to the queue. The queue takes ownership of |task|.
void Append(std::unique_ptr<Task> task);
// Returns the next task to process. Blocks if no task is available. Returns
// nullptr if the queue is terminated.
std::unique_ptr<Task> GetNext();
// Terminate the queue.
void Terminate();
private:
FRIEND_TEST(WorkerThreadTest, PostSingleTask);
void BlockUntilQueueEmptyForTesting();
base::Semaphore process_queue_semaphore_;
base::Mutex lock_;
std::queue<std::unique_ptr<Task>> task_queue_;
bool terminated_;
};
} // namespace platform
} // namespace v8
#endif // V8_LIBPLATFORM_TASK_QUEUE_H_
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