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// 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.
#include "base/power_monitor/power_monitor_source.h"
#include "base/power_monitor/power_monitor.h"
#include "build/build_config.h"
namespace base {
PowerMonitorSource::PowerMonitorSource() {}
PowerMonitorSource::~PowerMonitorSource() {}
bool PowerMonitorSource::IsOnBatteryPower() {
AutoLock auto_lock(battery_lock_);
return on_battery_power_;
}
void PowerMonitorSource::ProcessPowerEvent(PowerEvent event_id) {
PowerMonitor* monitor = PowerMonitor::Get();
if (!monitor)
return;
PowerMonitorSource* source = monitor->Source();
// Suppress duplicate notifications. Some platforms may
// send multiple notifications of the same event.
switch (event_id) {
case POWER_STATE_EVENT:
{
bool new_on_battery_power = source->IsOnBatteryPowerImpl();
bool changed = false;
{
AutoLock auto_lock(source->battery_lock_);
if (source->on_battery_power_ != new_on_battery_power) {
changed = true;
source->on_battery_power_ = new_on_battery_power;
}
}
if (changed)
monitor->NotifyPowerStateChange(new_on_battery_power);
}
break;
case RESUME_EVENT:
if (source->suspended_) {
source->suspended_ = false;
monitor->NotifyResume();
}
break;
case SUSPEND_EVENT:
if (!source->suspended_) {
source->suspended_ = true;
monitor->NotifySuspend();
}
break;
}
}
void PowerMonitorSource::SetInitialOnBatteryPowerState(bool on_battery_power) {
// Must only be called before a monitor exists, otherwise the caller should
// have just used a normal ProcessPowerEvent(POWER_STATE_EVENT) call.
DCHECK(!PowerMonitor::Get());
on_battery_power_ = on_battery_power;
}
} // namespace base
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