1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/power_monitor/power_monitor.h" 6 #include "base/power_monitor/power_monitor_source.h" 7 8 namespace base { 9 10 static PowerMonitor* g_power_monitor = NULL; 11 12 PowerMonitor::PowerMonitor(scoped_ptr<PowerMonitorSource> source) 13 : observers_(new ObserverListThreadSafe<PowerObserver>()), 14 source_(source.Pass()) { 15 DCHECK(!g_power_monitor); 16 g_power_monitor = this; 17 } 18 19 PowerMonitor::~PowerMonitor() { 20 DCHECK_EQ(this, g_power_monitor); 21 g_power_monitor = NULL; 22 } 23 24 // static 25 PowerMonitor* PowerMonitor::Get() { 26 return g_power_monitor; 27 } 28 29 void PowerMonitor::AddObserver(PowerObserver* obs) { 30 observers_->AddObserver(obs); 31 } 32 33 void PowerMonitor::RemoveObserver(PowerObserver* obs) { 34 observers_->RemoveObserver(obs); 35 } 36 37 PowerMonitorSource* PowerMonitor::Source() { 38 return source_.get(); 39 } 40 41 bool PowerMonitor::IsOnBatteryPower() { 42 return source_->IsOnBatteryPower(); 43 } 44 45 void PowerMonitor::NotifyPowerStateChange(bool battery_in_use) { 46 DVLOG(1) << "PowerStateChange: " << (battery_in_use ? "On" : "Off") 47 << " battery"; 48 observers_->Notify(&PowerObserver::OnPowerStateChange, battery_in_use); 49 } 50 51 void PowerMonitor::NotifySuspend() { 52 DVLOG(1) << "Power Suspending"; 53 observers_->Notify(&PowerObserver::OnSuspend); 54 } 55 56 void PowerMonitor::NotifyResume() { 57 DVLOG(1) << "Power Resuming"; 58 observers_->Notify(&PowerObserver::OnResume); 59 } 60 61 } // namespace base 62
