| // Copyright (c) 2010 The Chromium 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 BASE_TASK_QUEUE_H_ |
| #define BASE_TASK_QUEUE_H_ |
| #pragma once |
| |
| #include <deque> |
| |
| #include "base/task.h" |
| |
| // A TaskQueue is a queue of tasks waiting to be run. To run the tasks, call |
| // the Run method. A task queue is itself a Task so that it can be placed in a |
| // message loop or another task queue. |
| class TaskQueue : public Task { |
| public: |
| TaskQueue(); |
| ~TaskQueue(); |
| |
| // Run all the tasks in the queue. New tasks pushed onto the queue during |
| // a run will be run next time |Run| is called. |
| virtual void Run(); |
| |
| // Push the specified task onto the queue. When the queue is run, the tasks |
| // will be run in the order they are pushed. |
| // |
| // This method takes ownership of |task| and will delete task after it is run |
| // (or when the TaskQueue is destroyed, if we never got a chance to run it). |
| void Push(Task* task); |
| |
| // Remove all tasks from the queue. The tasks are deleted. |
| void Clear(); |
| |
| // Returns true if this queue contains no tasks. |
| bool IsEmpty() const; |
| |
| private: |
| // The list of tasks we are waiting to run. |
| std::deque<Task*> queue_; |
| }; |
| |
| #endif // BASE_TASK_QUEUE_H_ |