// Copyright 2013 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_LIBPLATFORM_TASK_QUEUE_H_
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#define V8_LIBPLATFORM_TASK_QUEUE_H_
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#include <queue>
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#include "include/libplatform/libplatform-export.h"
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#include "src/base/macros.h"
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#include "src/base/platform/mutex.h"
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#include "src/base/platform/semaphore.h"
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#include "testing/gtest/include/gtest/gtest_prod.h" // nogncheck
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namespace v8 {
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class Task;
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namespace platform {
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class V8_PLATFORM_EXPORT TaskQueue {
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public:
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TaskQueue();
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~TaskQueue();
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// Appends a task to the queue. The queue takes ownership of |task|.
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void Append(std::unique_ptr<Task> task);
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// Returns the next task to process. Blocks if no task is available. Returns
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// nullptr if the queue is terminated.
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std::unique_ptr<Task> GetNext();
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// Terminate the queue.
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void Terminate();
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private:
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FRIEND_TEST(WorkerThreadTest, PostSingleTask);
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void BlockUntilQueueEmptyForTesting();
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base::Semaphore process_queue_semaphore_;
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base::Mutex lock_;
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std::queue<std::unique_ptr<Task>> task_queue_;
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bool terminated_;
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DISALLOW_COPY_AND_ASSIGN(TaskQueue);
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};
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} // namespace platform
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} // namespace v8
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#endif // V8_LIBPLATFORM_TASK_QUEUE_H_
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