blob: 1bd55380d5b8e95420c78f67c9bbc33574a4bbdc [file] [log] [blame]
// Copyright (c) 2011 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 BASE_HI_RES_TIMER_MANAGER_H_
#define BASE_HI_RES_TIMER_MANAGER_H_
#include "base/base_export.h"
#include "base/system_monitor/system_monitor.h"
// Ensures that the Windows high resolution timer is only used
// when not running on battery power.
class BASE_EXPORT HighResolutionTimerManager
: public base::SystemMonitor::PowerObserver {
public:
HighResolutionTimerManager();
virtual ~HighResolutionTimerManager();
// base::SystemMonitor::PowerObserver:
virtual void OnPowerStateChange(bool on_battery_power) OVERRIDE;
// Returns true if the hi resolution clock could be used right now.
bool hi_res_clock_available() const { return hi_res_clock_available_; }
private:
// Enable or disable the faster multimedia timer.
void UseHiResClock(bool use);
bool hi_res_clock_available_;
DISALLOW_COPY_AND_ASSIGN(HighResolutionTimerManager);
};
#endif // BASE_HI_RES_TIMER_MANAGER_H_