| // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef APP_HI_RES_TIMER_MANAGER_H_ |
| #define APP_HI_RES_TIMER_MANAGER_H_ |
| #pragma once |
| |
| #include "app/system_monitor.h" |
| |
| // Ensures that the Windows high resolution timer is only used |
| // when not running on battery power. |
| class HighResolutionTimerManager : public SystemMonitor::PowerObserver { |
| public: |
| HighResolutionTimerManager(); |
| virtual ~HighResolutionTimerManager(); |
| |
| // SystemMonitor::PowerObserver: |
| void OnPowerStateChange(bool on_battery_power); |
| |
| private: |
| // Enable or disable the faster multimedia timer. |
| void UseHiResClock(bool use); |
| |
| bool hi_res_clock_used_; |
| |
| DISALLOW_COPY_AND_ASSIGN(HighResolutionTimerManager); |
| }; |
| |
| #endif // APP_HI_RES_TIMER_MANAGER_H_ |