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70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/power_monitor/power_monitor_source.h"
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#include "base/power_monitor/power_monitor.h"
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#include "build/build_config.h"
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namespace base {
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PowerMonitorSource::PowerMonitorSource() = default;
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PowerMonitorSource::~PowerMonitorSource() = default;
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bool PowerMonitorSource::IsOnBatteryPower() {
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AutoLock auto_lock(battery_lock_);
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return on_battery_power_;
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}
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void PowerMonitorSource::ProcessPowerEvent(PowerEvent event_id) {
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PowerMonitor* monitor = PowerMonitor::Get();
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if (!monitor)
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return;
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PowerMonitorSource* source = monitor->Source();
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// Suppress duplicate notifications. Some platforms may
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// send multiple notifications of the same event.
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switch (event_id) {
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case POWER_STATE_EVENT:
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{
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bool new_on_battery_power = source->IsOnBatteryPowerImpl();
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bool changed = false;
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{
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AutoLock auto_lock(source->battery_lock_);
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if (source->on_battery_power_ != new_on_battery_power) {
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changed = true;
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source->on_battery_power_ = new_on_battery_power;
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}
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}
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if (changed)
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monitor->NotifyPowerStateChange(new_on_battery_power);
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}
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break;
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case RESUME_EVENT:
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if (source->suspended_) {
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source->suspended_ = false;
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monitor->NotifyResume();
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}
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break;
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case SUSPEND_EVENT:
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if (!source->suspended_) {
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source->suspended_ = true;
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monitor->NotifySuspend();
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}
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break;
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}
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}
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void PowerMonitorSource::SetInitialOnBatteryPowerState(bool on_battery_power) {
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// Must only be called before a monitor exists, otherwise the caller should
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// have just used a normal ProcessPowerEvent(POWER_STATE_EVENT) call.
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DCHECK(!PowerMonitor::Get());
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on_battery_power_ = on_battery_power;
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}
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} // namespace base
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