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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_TASK_QUEUE_H_ | 5 #ifndef BASE_TASK_QUEUE_H_ |
6 #define BASE_TASK_QUEUE_H_ | 6 #define BASE_TASK_QUEUE_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <deque> | 9 #include <deque> |
10 | 10 |
11 #include "base/task.h" | 11 #include "base/task.h" |
12 | 12 |
13 // A TaskQueue is a queue of tasks waiting to be run. To run the tasks, call | 13 // A TaskQueue is a queue of tasks waiting to be run. To run the tasks, call |
14 // the Run method. A task queue is itself a Task so that it can be placed in a | 14 // the Run method. A task queue is itself a Task so that it can be placed in a |
15 // message loop or another task queue. | 15 // message loop or another task queue. |
16 class TaskQueue : public Task { | 16 class TaskQueue : public Task { |
17 public: | 17 public: |
18 TaskQueue(); | 18 TaskQueue(); |
19 ~TaskQueue(); | 19 ~TaskQueue(); |
20 | 20 |
21 // Run all the tasks in the queue. New tasks pushed onto the queue during | |
22 // a run will be run next time |Run| is called. | |
23 virtual void Run(); | |
24 | |
25 // Push the specified task onto the queue. When the queue is run, the tasks | 21 // Push the specified task onto the queue. When the queue is run, the tasks |
26 // will be run in the order they are pushed. | 22 // will be run in the order they are pushed. |
27 // | 23 // |
28 // This method takes ownership of |task| and will delete task after it is run | 24 // This method takes ownership of |task| and will delete task after it is run |
29 // (or when the TaskQueue is destroyed, if we never got a chance to run it). | 25 // (or when the TaskQueue is destroyed, if we never got a chance to run it). |
30 void Push(Task* task); | 26 void Push(Task* task); |
31 | 27 |
32 // Remove all tasks from the queue. The tasks are deleted. | 28 // Remove all tasks from the queue. The tasks are deleted. |
33 void Clear(); | 29 void Clear(); |
34 | 30 |
35 // Returns true if this queue contains no tasks. | 31 // Returns true if this queue contains no tasks. |
36 bool IsEmpty() const; | 32 bool IsEmpty() const; |
37 | 33 |
| 34 // Run all the tasks in the queue. New tasks pushed onto the queue during |
| 35 // a run will be run next time |Run| is called. |
| 36 virtual void Run(); |
| 37 |
38 private: | 38 private: |
39 // The list of tasks we are waiting to run. | 39 // The list of tasks we are waiting to run. |
40 std::deque<Task*> queue_; | 40 std::deque<Task*> queue_; |
41 }; | 41 }; |
42 | 42 |
43 #endif // BASE_TASK_QUEUE_H_ | 43 #endif // BASE_TASK_QUEUE_H_ |
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