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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 PENDING_TASK_H_ | 5 #ifndef PENDING_TASK_H_ |
6 #define PENDING_TASK_H_ | 6 #define PENDING_TASK_H_ |
7 | 7 |
8 #include <queue> | 8 #include <queue> |
9 | 9 |
10 #include "base/base_export.h" | 10 #include "base/base_export.h" |
11 #include "base/callback.h" | 11 #include "base/callback.h" |
12 #include "base/location.h" | 12 #include "base/location.h" |
13 #include "base/time/time.h" | 13 #include "base/time/time.h" |
14 #include "base/tracking_info.h" | 14 #include "base/tracking_info.h" |
15 | 15 |
16 namespace base { | 16 namespace base { |
17 | 17 |
18 // Contains data about a pending task. Stored in TaskQueue and DelayedTaskQueue | 18 // Contains data about a pending task. Stored in TaskQueue and DelayedTaskQueue |
19 // for use by classes that queue and execute tasks. | 19 // for use by classes that queue and execute tasks. |
20 struct BASE_EXPORT PendingTask : public TrackingInfo { | 20 struct BASE_EXPORT PendingTask : public TrackingInfo { |
21 #if _MSC_VER >= 1700 | |
22 PendingTask(); | |
23 #endif | |
24 PendingTask(const tracked_objects::Location& posted_from, | 21 PendingTask(const tracked_objects::Location& posted_from, |
25 const Closure& task); | 22 const Closure& task); |
26 PendingTask(const tracked_objects::Location& posted_from, | 23 PendingTask(const tracked_objects::Location& posted_from, |
27 const Closure& task, | 24 const Closure& task, |
28 TimeTicks delayed_run_time, | 25 TimeTicks delayed_run_time, |
29 bool nestable); | 26 bool nestable); |
30 ~PendingTask(); | 27 ~PendingTask(); |
31 | 28 |
32 // Used to support sorting. | 29 // Used to support sorting. |
33 bool operator<(const PendingTask& other) const; | 30 bool operator<(const PendingTask& other) const; |
34 | 31 |
35 // The task to run. | 32 // The task to run. |
36 Closure task; | 33 Closure task; |
37 | 34 |
38 // The site this PendingTask was posted from. | 35 // The site this PendingTask was posted from. |
39 tracked_objects::Location posted_from; | 36 tracked_objects::Location posted_from; |
40 | 37 |
41 // Secondary sort key for run time. | 38 // Secondary sort key for run time. |
42 int sequence_num; | 39 int sequence_num; |
43 | 40 |
44 // OK to dispatch from a nested loop. | 41 // OK to dispatch from a nested loop. |
45 bool nestable; | 42 bool nestable; |
| 43 |
| 44 // Needs high resolution timers. |
| 45 bool is_high_res; |
46 }; | 46 }; |
47 | 47 |
48 // Wrapper around std::queue specialized for PendingTask which adds a Swap | 48 // Wrapper around std::queue specialized for PendingTask which adds a Swap |
49 // helper method. | 49 // helper method. |
50 class BASE_EXPORT TaskQueue : public std::queue<PendingTask> { | 50 class BASE_EXPORT TaskQueue : public std::queue<PendingTask> { |
51 public: | 51 public: |
52 void Swap(TaskQueue* queue); | 52 void Swap(TaskQueue* queue); |
53 }; | 53 }; |
54 | 54 |
55 // PendingTasks are sorted by their |delayed_run_time| property. | 55 // PendingTasks are sorted by their |delayed_run_time| property. |
56 typedef std::priority_queue<base::PendingTask> DelayedTaskQueue; | 56 typedef std::priority_queue<base::PendingTask> DelayedTaskQueue; |
57 | 57 |
58 } // namespace base | 58 } // namespace base |
59 | 59 |
60 #endif // PENDING_TASK_H_ | 60 #endif // PENDING_TASK_H_ |
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