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// Copyright (c) 2008 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.
#include "base/system_monitor.h"
namespace base {
void SystemMonitor::ProcessWmPowerBroadcastMessage(int event_id) {
PowerEvent power_event;
switch (event_id) {
case PBT_APMPOWERSTATUSCHANGE: // The power status changed.
power_event = POWER_STATE_EVENT;
break;
case PBT_APMRESUMEAUTOMATIC: // Resume from suspend.
//case PBT_APMRESUMESUSPEND: // User-initiated resume from suspend.
// We don't notify for this latter event
// because if it occurs it is always sent as a
// second event after PBT_APMRESUMEAUTOMATIC.
power_event = RESUME_EVENT;
break;
case PBT_APMSUSPEND: // System has been suspended.
power_event = SUSPEND_EVENT;
break;
default:
return;
// Other Power Events:
// PBT_APMBATTERYLOW - removed in Vista.
// PBT_APMOEMEVENT - removed in Vista.
// PBT_APMQUERYSUSPEND - removed in Vista.
// PBT_APMQUERYSUSPENDFAILED - removed in Vista.
// PBT_APMRESUMECRITICAL - removed in Vista.
// PBT_POWERSETTINGCHANGE - user changed the power settings.
}
ProcessPowerMessage(power_event);
}
// Function to query the system to see if it is currently running on
// battery power. Returns true if running on battery.
bool SystemMonitor::IsBatteryPower() {
SYSTEM_POWER_STATUS status;
if (!GetSystemPowerStatus(&status)) {
LOG(ERROR) << "GetSystemPowerStatus failed: " << GetLastError();
return false;
}
return (status.ACLineStatus == 0);
}
} // namespace base
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