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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 WEBKIT_BROWSER_FILEAPI_TIMED_TASK_HELPER_H_ | 5 #include "storage/browser/fileapi/timed_task_helper.h" |
6 #define WEBKIT_BROWSER_FILEAPI_TIMED_TASK_HELPER_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/callback.h" | |
10 #include "base/location.h" | |
11 #include "base/memory/ref_counted.h" | |
12 #include "base/memory/scoped_ptr.h" | |
13 #include "base/time/time.h" | |
14 #include "webkit/browser/storage_browser_export.h" | |
15 | |
16 namespace base { | |
17 class SequencedTaskRunner; | |
18 } | |
19 | |
20 namespace storage { | |
21 | |
22 // Works similarly as base::Timer, but takes SequencedTaskRunner and | |
23 // runs tasks on it (instead of implicitly bound to a thread). | |
24 // TODO(kinuko): This has nothing to do with fileapi. Move somewhere | |
25 // more common place. | |
26 class STORAGE_EXPORT TimedTaskHelper { | |
27 public: | |
28 explicit TimedTaskHelper(base::SequencedTaskRunner* task_runner); | |
29 ~TimedTaskHelper(); | |
30 | |
31 bool IsRunning() const; | |
32 void Start(const tracked_objects::Location& posted_from, | |
33 base::TimeDelta delay, | |
34 const base::Closure& user_task); | |
35 void Reset(); | |
36 | |
37 private: | |
38 struct Tracker; | |
39 static void Fired(scoped_ptr<Tracker> tracker); | |
40 | |
41 void OnFired(scoped_ptr<Tracker> tracker); | |
42 void PostDelayedTask(scoped_ptr<Tracker> tracker, base::TimeDelta delay); | |
43 | |
44 scoped_refptr<base::SequencedTaskRunner> task_runner_; | |
45 tracked_objects::Location posted_from_; | |
46 base::TimeDelta delay_; | |
47 base::Closure user_task_; | |
48 | |
49 base::TimeTicks desired_run_time_; | |
50 | |
51 // This is set to non-null and owned by a timer task while timer is running. | |
52 Tracker* tracker_; | |
53 | |
54 DISALLOW_COPY_AND_ASSIGN(TimedTaskHelper); | |
55 }; | |
56 | |
57 } // namespace storage | |
58 | |
59 #endif // WEBKIT_BROWSER_FILEAPI_TIMED_TASK_HELPER_H_ | |
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