jeremy@chromium.org
1ebd2bd8ed
Batter Power is used on Windows to toggle HiRest timers, but this isn't applicable on other platforms. Review URL: http://codereview.chromium.org/21187 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@9510 0039d316-1c4b-4281-b951-d872f2087c98
90 linhas
2.4 KiB
C++
90 linhas
2.4 KiB
C++
// Copyright (c) 2008 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/system_monitor.h"
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#include "base/logging.h"
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#include "base/message_loop.h"
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namespace base {
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#if defined(ENABLE_BATTERY_MONITORING)
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// The amount of time (in ms) to wait before running the initial
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// battery check.
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static int kDelayedBatteryCheckMs = 10 * 1000;
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#endif // defined(ENABLE_BATTERY_MONITORING)
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SystemMonitor::SystemMonitor()
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: battery_in_use_(false),
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suspended_(false) {
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observer_list_ = new ObserverListThreadSafe<PowerObserver>();
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}
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void SystemMonitor::ProcessPowerMessage(PowerEvent event_id) {
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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 on_battery = IsBatteryPower();
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if (on_battery != battery_in_use_) {
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battery_in_use_ = on_battery;
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NotifyPowerStateChange();
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}
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}
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break;
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case RESUME_EVENT:
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if (suspended_) {
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suspended_ = false;
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NotifyResume();
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}
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break;
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case SUSPEND_EVENT:
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if (!suspended_) {
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suspended_ = true;
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NotifySuspend();
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}
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break;
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}
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}
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void SystemMonitor::AddObserver(PowerObserver* obs) {
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observer_list_->AddObserver(obs);
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}
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void SystemMonitor::RemoveObserver(PowerObserver* obs) {
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observer_list_->RemoveObserver(obs);
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}
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void SystemMonitor::NotifyPowerStateChange() {
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LOG(INFO) << L"PowerStateChange: "
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<< (BatteryPower() ? L"On" : L"Off") << L" battery";
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observer_list_->Notify(&PowerObserver::OnPowerStateChange, this);
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}
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void SystemMonitor::NotifySuspend() {
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LOG(INFO) << L"Power Suspending";
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observer_list_->Notify(&PowerObserver::OnSuspend, this);
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}
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void SystemMonitor::NotifyResume() {
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LOG(INFO) << L"Power Resuming";
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observer_list_->Notify(&PowerObserver::OnResume, this);
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}
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void SystemMonitor::Start() {
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#if defined(ENABLE_BATTERY_MONITORING)
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DCHECK(MessageLoop::current()); // Can't call start too early.
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SystemMonitor* monitor = Get();
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monitor->delayed_battery_check_.Start(
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TimeDelta::FromMilliseconds(kDelayedBatteryCheckMs), monitor,
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&SystemMonitor::BatteryCheck);
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#endif // defined(ENABLE_BATTERY_MONITORING)
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}
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void SystemMonitor::BatteryCheck() {
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ProcessPowerMessage(SystemMonitor::POWER_STATE_EVENT);
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}
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} // namespace base
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