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comparison: ipc/chromium/src/base/system_monitor.cc
ipc/chromium/src/base/system_monitor.cc
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| -1:000000000000 | 0:967c6a887563 |
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| 1 // Copyright (c) 2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/system_monitor.h" | |
| 6 #include "base/logging.h" | |
| 7 #include "base/message_loop.h" | |
| 8 | |
| 9 namespace base { | |
| 10 | |
| 11 #if defined(ENABLE_BATTERY_MONITORING) | |
| 12 // The amount of time (in ms) to wait before running the initial | |
| 13 // battery check. | |
| 14 static int kDelayedBatteryCheckMs = 10 * 1000; | |
| 15 #endif // defined(ENABLE_BATTERY_MONITORING) | |
| 16 | |
| 17 SystemMonitor::SystemMonitor() | |
| 18 : battery_in_use_(false), | |
| 19 suspended_(false) { | |
| 20 observer_list_ = new ObserverListThreadSafe<PowerObserver>(); | |
| 21 } | |
| 22 | |
| 23 void SystemMonitor::ProcessPowerMessage(PowerEvent event_id) { | |
| 24 // Suppress duplicate notifications. Some platforms may | |
| 25 // send multiple notifications of the same event. | |
| 26 switch (event_id) { | |
| 27 case POWER_STATE_EVENT: | |
| 28 { | |
| 29 bool on_battery = IsBatteryPower(); | |
| 30 if (on_battery != battery_in_use_) { | |
| 31 battery_in_use_ = on_battery; | |
| 32 NotifyPowerStateChange(); | |
| 33 } | |
| 34 } | |
| 35 break; | |
| 36 case RESUME_EVENT: | |
| 37 if (suspended_) { | |
| 38 suspended_ = false; | |
| 39 NotifyResume(); | |
| 40 } | |
| 41 break; | |
| 42 case SUSPEND_EVENT: | |
| 43 if (!suspended_) { | |
| 44 suspended_ = true; | |
| 45 NotifySuspend(); | |
| 46 } | |
| 47 break; | |
| 48 } | |
| 49 } | |
| 50 | |
| 51 void SystemMonitor::AddObserver(PowerObserver* obs) { | |
| 52 observer_list_->AddObserver(obs); | |
| 53 } | |
| 54 | |
| 55 void SystemMonitor::RemoveObserver(PowerObserver* obs) { | |
| 56 observer_list_->RemoveObserver(obs); | |
| 57 } | |
| 58 | |
| 59 void SystemMonitor::NotifyPowerStateChange() { | |
| 60 CHROMIUM_LOG(INFO) << "PowerStateChange: " | |
| 61 << (BatteryPower() ? "On" : "Off") << " battery"; | |
| 62 observer_list_->Notify(&PowerObserver::OnPowerStateChange, this); | |
| 63 } | |
| 64 | |
| 65 void SystemMonitor::NotifySuspend() { | |
| 66 CHROMIUM_LOG(INFO) << "Power Suspending"; | |
| 67 observer_list_->Notify(&PowerObserver::OnSuspend, this); | |
| 68 } | |
| 69 | |
| 70 void SystemMonitor::NotifyResume() { | |
| 71 CHROMIUM_LOG(INFO) << "Power Resuming"; | |
| 72 observer_list_->Notify(&PowerObserver::OnResume, this); | |
| 73 } | |
| 74 | |
| 75 void SystemMonitor::Start() { | |
| 76 #if defined(ENABLE_BATTERY_MONITORING) | |
| 77 DCHECK(MessageLoop::current()); // Can't call start too early. | |
| 78 SystemMonitor* monitor = Get(); | |
| 79 monitor->delayed_battery_check_.Start( | |
| 80 TimeDelta::FromMilliseconds(kDelayedBatteryCheckMs), monitor, | |
| 81 &SystemMonitor::BatteryCheck); | |
| 82 #endif // defined(ENABLE_BATTERY_MONITORING) | |
| 83 } | |
| 84 | |
| 85 void SystemMonitor::BatteryCheck() { | |
| 86 ProcessPowerMessage(SystemMonitor::POWER_STATE_EVENT); | |
| 87 } | |
| 88 | |
| 89 } // namespace base |
