task-queue.h

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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 <queue>
 
#include "src/base/macros.h"
#include "src/base/platform/mutex.h"
#include "src/base/platform/semaphore.h"
 
namespace v8 {
 
class Task;
 
namespace platform {
 
class TaskQueue {
 public:
  TaskQueue();
  ~TaskQueue();
 
  // Appends a task to the queue. The queue takes ownership of |task|.
  void Append(Task* task);
 
  // Returns the next task to process. Blocks if no task is available. Returns
  // NULL if the queue is terminated.
  Task* GetNext();
 
  // Terminate the queue.
  void Terminate();
 
 private:
  base::Mutex lock_;
  base::Semaphore process_queue_semaphore_;
  std::queue<Task*> task_queue_;
  bool terminated_;
 
  DISALLOW_COPY_AND_ASSIGN(TaskQueue);
};
 
} }  // namespace v8::platform
 
 
#endif  // V8_LIBPLATFORM_TASK_QUEUE_H_