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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_HI_RES_TIMER_MANAGER_H_ | 5 #ifndef BASE_TIMER_HI_RES_TIMER_MANAGER_H_ |
6 #define BASE_HI_RES_TIMER_MANAGER_H_ | 6 #define BASE_TIMER_HI_RES_TIMER_MANAGER_H_ |
7 | 7 |
8 #include "base/base_export.h" | 8 #include "base/base_export.h" |
9 #include "base/basictypes.h" | 9 #include "base/basictypes.h" |
10 #include "base/power_monitor/power_observer.h" | 10 #include "base/power_monitor/power_observer.h" |
11 | 11 |
| 12 namespace base { |
| 13 |
12 // Ensures that the Windows high resolution timer is only used | 14 // Ensures that the Windows high resolution timer is only used |
13 // when not running on battery power. | 15 // when not running on battery power. |
14 class BASE_EXPORT HighResolutionTimerManager : public base::PowerObserver { | 16 class BASE_EXPORT HighResolutionTimerManager : public base::PowerObserver { |
15 public: | 17 public: |
16 HighResolutionTimerManager(); | 18 HighResolutionTimerManager(); |
17 virtual ~HighResolutionTimerManager(); | 19 virtual ~HighResolutionTimerManager(); |
18 | 20 |
19 // base::PowerObserver method. | 21 // base::PowerObserver method. |
20 virtual void OnPowerStateChange(bool on_battery_power) OVERRIDE; | 22 virtual void OnPowerStateChange(bool on_battery_power) OVERRIDE; |
21 | 23 |
22 // Returns true if the hi resolution clock could be used right now. | 24 // Returns true if the hi resolution clock could be used right now. |
23 bool hi_res_clock_available() const { return hi_res_clock_available_; } | 25 bool hi_res_clock_available() const { return hi_res_clock_available_; } |
24 | 26 |
25 private: | 27 private: |
26 // Enable or disable the faster multimedia timer. | 28 // Enable or disable the faster multimedia timer. |
27 void UseHiResClock(bool use); | 29 void UseHiResClock(bool use); |
28 | 30 |
29 bool hi_res_clock_available_; | 31 bool hi_res_clock_available_; |
30 | 32 |
31 DISALLOW_COPY_AND_ASSIGN(HighResolutionTimerManager); | 33 DISALLOW_COPY_AND_ASSIGN(HighResolutionTimerManager); |
32 }; | 34 }; |
33 | 35 |
34 #endif // BASE_HI_RES_TIMER_MANAGER_H_ | 36 } // namespace base |
| 37 |
| 38 #endif // BASE_TIMER_HI_RES_TIMER_MANAGER_H_ |
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