OLD | NEW |
1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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_POWER_MONITOR_POWER_OBSERVER_H_ | 5 #ifndef BASE_POWER_MONITOR_POWER_OBSERVER_H_ |
6 #define BASE_POWER_MONITOR_POWER_OBSERVER_H_ | 6 #define BASE_POWER_MONITOR_POWER_OBSERVER_H_ |
7 | 7 |
8 #include "base/base_export.h" | 8 #include "base/base_export.h" |
9 #include "base/compiler_specific.h" | 9 #include "base/compiler_specific.h" |
10 #include "base/memory/scoped_ptr.h" | |
11 #include "base/threading/thread_checker.h" | |
12 | 10 |
13 namespace base { | 11 namespace base { |
14 | 12 |
15 class BASE_EXPORT PowerObserver { | 13 class BASE_EXPORT PowerObserver { |
16 friend class PowerMonitor; | |
17 | |
18 public: | 14 public: |
19 PowerObserver(); | |
20 | |
21 // Notification of a change in power status of the computer, such | 15 // Notification of a change in power status of the computer, such |
22 // as from switching between battery and A/C power. | 16 // as from switching between battery and A/C power. |
23 virtual void OnPowerStateChange(bool on_battery_power) {} | 17 virtual void OnPowerStateChange(bool on_battery_power) {}; |
24 | 18 |
25 // Notification that the system is suspending. | 19 // Notification that the system is suspending. |
26 virtual void OnSuspend() {} | 20 virtual void OnSuspend() {} |
27 | 21 |
28 // Notification that the system is resuming. | 22 // Notification that the system is resuming. |
29 virtual void OnResume() {} | 23 virtual void OnResume() {} |
30 | 24 |
31 protected: | 25 protected: |
32 virtual ~PowerObserver(); | 26 virtual ~PowerObserver() {} |
33 | |
34 private: | |
35 // Allows PowerMonitor to ensure this observer is added and removed | |
36 // from the same thread, which is required by the ObserverListThreadSafe. | |
37 scoped_ptr<base::ThreadChecker> power_monitor_thread_checker_; | |
38 }; | 27 }; |
39 | 28 |
40 } // namespace base | 29 } // namespace base |
41 | 30 |
42 #endif // BASE_POWER_MONITOR_POWER_OBSERVER_H_ | 31 #endif // BASE_POWER_MONITOR_POWER_OBSERVER_H_ |
OLD | NEW |