mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-12-01 01:36:09 +03:00
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
|
// 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_TIMER_HI_RES_TIMER_MANAGER_H_
|
||
|
|
#define BASE_TIMER_HI_RES_TIMER_MANAGER_H_
|
||
|
|
|
||
|
|
#include "base/base_export.h"
|
||
|
|
#include "base/macros.h"
|
||
|
|
#include "base/memory/ref_counted.h"
|
||
|
|
#include "base/power_monitor/power_observer.h"
|
||
|
|
#include "base/timer/timer.h"
|
||
|
|
#include "build/build_config.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
// Ensures that the Windows high resolution timer is only used
|
||
|
|
// when not running on battery power.
|
||
|
|
class BASE_EXPORT HighResolutionTimerManager : public base::PowerObserver {
|
||
|
|
public:
|
||
|
|
HighResolutionTimerManager();
|
||
|
|
~HighResolutionTimerManager() override;
|
||
|
|
|
||
|
|
// base::PowerObserver methods.
|
||
|
|
void OnPowerStateChange(bool on_battery_power) override;
|
||
|
|
void OnSuspend() override;
|
||
|
|
void OnResume() 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_;
|
||
|
|
|
||
|
|
#if defined(OS_WIN)
|
||
|
|
// Timer for polling the high resolution timer usage.
|
||
|
|
base::RepeatingTimer timer_;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
DISALLOW_COPY_AND_ASSIGN(HighResolutionTimerManager);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace base
|
||
|
|
|
||
|
|
#endif // BASE_TIMER_HI_RES_TIMER_MANAGER_H_
|