michael@0: // Copyright (c) 2008 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #include "base/system_monitor.h"
michael@0: 
michael@0: namespace base {
michael@0: 
michael@0: void SystemMonitor::ProcessWmPowerBroadcastMessage(int event_id) {
michael@0:   PowerEvent power_event;
michael@0:   switch (event_id) {
michael@0:     case PBT_APMPOWERSTATUSCHANGE:  // The power status changed.
michael@0:       power_event = POWER_STATE_EVENT;
michael@0:       break;
michael@0:     case PBT_APMRESUMEAUTOMATIC:  // Non-user initiated resume from suspend.
michael@0:     case PBT_APMRESUMESUSPEND:    // User initiated resume from suspend.
michael@0:       power_event = RESUME_EVENT;
michael@0:       break;
michael@0:     case PBT_APMSUSPEND:  // System has been suspended.
michael@0:       power_event = SUSPEND_EVENT;
michael@0:       break;
michael@0:     default:
michael@0:       return;
michael@0: 
michael@0:     // Other Power Events:
michael@0:     // PBT_APMBATTERYLOW - removed in Vista.
michael@0:     // PBT_APMOEMEVENT - removed in Vista.
michael@0:     // PBT_APMQUERYSUSPEND - removed in Vista.
michael@0:     // PBT_APMQUERYSUSPENDFAILED - removed in Vista.
michael@0:     // PBT_APMRESUMECRITICAL - removed in Vista.
michael@0:     // PBT_POWERSETTINGCHANGE - user changed the power settings.
michael@0:   }
michael@0:   ProcessPowerMessage(power_event);
michael@0: }
michael@0: 
michael@0: // Function to query the system to see if it is currently running on
michael@0: // battery power.  Returns true if running on battery.
michael@0: bool SystemMonitor::IsBatteryPower() {
michael@0:   SYSTEM_POWER_STATUS status;
michael@0:   if (!GetSystemPowerStatus(&status)) {
michael@0:     CHROMIUM_LOG(ERROR) << "GetSystemPowerStatus failed: " << GetLastError();
michael@0:     return false;
michael@0:   }
michael@0:   return (status.ACLineStatus == 0);
michael@0: }
michael@0: 
michael@0: 
michael@0: 
michael@0: } // namespace base