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_source.h" 6 7 #include "base/power_monitor/power_monitor.h" 8 9 namespace base { 10 11 PowerMonitorSource::PowerMonitorSource() 12 : on_battery_power_(false), 13 suspended_(false) { 14 } 15 16 PowerMonitorSource::~PowerMonitorSource() { 17 } 18 19 bool PowerMonitorSource::IsOnBatteryPower() { 20 AutoLock auto_lock(battery_lock_); 21 return on_battery_power_; 22 } 23 24 void PowerMonitorSource::ProcessPowerEvent(PowerEvent event_id) { 25 PowerMonitor* monitor = PowerMonitor::Get(); 26 if (!monitor) 27 return; 28 29 PowerMonitorSource* source = monitor->Source(); 30 31 // Suppress duplicate notifications. Some platforms may 32 // send multiple notifications of the same event. 33 switch (event_id) { 34 case POWER_STATE_EVENT: 35 { 36 bool new_on_battery_power = source->IsOnBatteryPowerImpl(); 37 bool changed = false; 38 39 { 40 AutoLock auto_lock(source->battery_lock_); 41 if (source->on_battery_power_ != new_on_battery_power) { 42 changed = true; 43 source->on_battery_power_ = new_on_battery_power; 44 } 45 } 46 47 if (changed) 48 monitor->NotifyPowerStateChange(new_on_battery_power); 49 } 50 break; 51 case RESUME_EVENT: 52 if (source->suspended_) { 53 source->suspended_ = false; 54 monitor->NotifyResume(); 55 } 56 break; 57 case SUSPEND_EVENT: 58 if (!source->suspended_) { 59 source->suspended_ = true; 60 monitor->NotifySuspend(); 61 } 62 break; 63 } 64 } 65 66 } // namespace base 67
