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Side by Side Diff: base/task_queue.h

Issue 7064033: Virtual destructors should have virtual keyword. (Closed) Base URL: http://git.chromium.org/git/chromium.git@trunk
Patch Set: Created 9 years, 7 months ago
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1 // Copyright (c) 2011 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/base_api.h" 11 #include "base/base_api.h"
12 #include "base/task.h" 12 #include "base/task.h"
13 13
14 // A TaskQueue is a queue of tasks waiting to be run. To run the tasks, call 14 // A TaskQueue is a queue of tasks waiting to be run. To run the tasks, call
15 // the Run method. A task queue is itself a Task so that it can be placed in a 15 // the Run method. A task queue is itself a Task so that it can be placed in a
16 // message loop or another task queue. 16 // message loop or another task queue.
17 class BASE_API TaskQueue : public Task { 17 class BASE_API TaskQueue : public Task {
18 public: 18 public:
19 TaskQueue(); 19 TaskQueue();
20 ~TaskQueue(); 20 virtual ~TaskQueue();
21 21
22 // Push the specified task onto the queue. When the queue is run, the tasks 22 // Push the specified task onto the queue. When the queue is run, the tasks
23 // will be run in the order they are pushed. 23 // will be run in the order they are pushed.
24 // 24 //
25 // This method takes ownership of |task| and will delete task after it is run 25 // This method takes ownership of |task| and will delete task after it is run
26 // (or when the TaskQueue is destroyed, if we never got a chance to run it). 26 // (or when the TaskQueue is destroyed, if we never got a chance to run it).
27 void Push(Task* task); 27 void Push(Task* task);
28 28
29 // Remove all tasks from the queue. The tasks are deleted. 29 // Remove all tasks from the queue. The tasks are deleted.
30 void Clear(); 30 void Clear();
31 31
32 // Returns true if this queue contains no tasks. 32 // Returns true if this queue contains no tasks.
33 bool IsEmpty() const; 33 bool IsEmpty() const;
34 34
35 // Run all the tasks in the queue. New tasks pushed onto the queue during 35 // Run all the tasks in the queue. New tasks pushed onto the queue during
36 // a run will be run next time |Run| is called. 36 // a run will be run next time |Run| is called.
37 virtual void Run(); 37 virtual void Run();
38 38
39 private: 39 private:
40 // The list of tasks we are waiting to run. 40 // The list of tasks we are waiting to run.
41 std::deque<Task*> queue_; 41 std::deque<Task*> queue_;
42 }; 42 };
43 43
44 #endif // BASE_TASK_QUEUE_H_ 44 #endif // BASE_TASK_QUEUE_H_
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