mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 06:16:30 +03:00
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
// Copyright 2013 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_POWER_MONITOR_POWER_MONITOR_H_
|
|
#define BASE_POWER_MONITOR_POWER_MONITOR_H_
|
|
|
|
#include "base/base_export.h"
|
|
#include "base/macros.h"
|
|
#include "base/memory/ref_counted.h"
|
|
#include "base/observer_list_threadsafe.h"
|
|
#include "base/power_monitor/power_observer.h"
|
|
|
|
namespace base {
|
|
|
|
class PowerMonitorSource;
|
|
|
|
// A class used to monitor the power state change and notify the observers about
|
|
// the change event.
|
|
class BASE_EXPORT PowerMonitor {
|
|
public:
|
|
// Takes ownership of |source|.
|
|
explicit PowerMonitor(std::unique_ptr<PowerMonitorSource> source);
|
|
~PowerMonitor();
|
|
|
|
// Get the process-wide PowerMonitor (if not present, returns NULL).
|
|
static PowerMonitor* Get();
|
|
|
|
// Add and remove an observer.
|
|
// Can be called from any thread.
|
|
// Must not be called from within a notification callback.
|
|
void AddObserver(PowerObserver* observer);
|
|
void RemoveObserver(PowerObserver* observer);
|
|
|
|
// Is the computer currently on battery power.
|
|
bool IsOnBatteryPower();
|
|
|
|
private:
|
|
friend class PowerMonitorSource;
|
|
|
|
PowerMonitorSource* Source();
|
|
|
|
void NotifyPowerStateChange(bool battery_in_use);
|
|
void NotifySuspend();
|
|
void NotifyResume();
|
|
|
|
scoped_refptr<ObserverListThreadSafe<PowerObserver> > observers_;
|
|
std::unique_ptr<PowerMonitorSource> source_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(PowerMonitor);
|
|
};
|
|
|
|
} // namespace base
|
|
|
|
#endif // BASE_POWER_MONITOR_POWER_MONITOR_H_
|