ipc/chromium/src/base/system_monitor.cc@6474c204b198 (annotated)
ipc/chromium/src/base/system_monitor.cc
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Copyright (c) 2008 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | #include "base/system_monitor.h" |
| michael@0 | 6 | #include "base/logging.h" |
| michael@0 | 7 | #include "base/message_loop.h" |
| michael@0 | 8 | |
| michael@0 | 9 | namespace base { |
| michael@0 | 10 | |
| michael@0 | 11 | #if defined(ENABLE_BATTERY_MONITORING) |
| michael@0 | 12 | // The amount of time (in ms) to wait before running the initial |
| michael@0 | 13 | // battery check. |
| michael@0 | 14 | static int kDelayedBatteryCheckMs = 10 * 1000; |
| michael@0 | 15 | #endif // defined(ENABLE_BATTERY_MONITORING) |
| michael@0 | 16 | |
| michael@0 | 17 | SystemMonitor::SystemMonitor() |
| michael@0 | 18 | : battery_in_use_(false), |
| michael@0 | 19 | suspended_(false) { |
| michael@0 | 20 | observer_list_ = new ObserverListThreadSafe<PowerObserver>(); |
| michael@0 | 21 | } |
| michael@0 | 22 | |
| michael@0 | 23 | void SystemMonitor::ProcessPowerMessage(PowerEvent event_id) { |
| michael@0 | 24 | // Suppress duplicate notifications. Some platforms may |
| michael@0 | 25 | // send multiple notifications of the same event. |
| michael@0 | 26 | switch (event_id) { |
| michael@0 | 27 | case POWER_STATE_EVENT: |
| michael@0 | 28 | { |
| michael@0 | 29 | bool on_battery = IsBatteryPower(); |
| michael@0 | 30 | if (on_battery != battery_in_use_) { |
| michael@0 | 31 | battery_in_use_ = on_battery; |
| michael@0 | 32 | NotifyPowerStateChange(); |
| michael@0 | 33 | } |
| michael@0 | 34 | } |
| michael@0 | 35 | break; |
| michael@0 | 36 | case RESUME_EVENT: |
| michael@0 | 37 | if (suspended_) { |
| michael@0 | 38 | suspended_ = false; |
| michael@0 | 39 | NotifyResume(); |
| michael@0 | 40 | } |
| michael@0 | 41 | break; |
| michael@0 | 42 | case SUSPEND_EVENT: |
| michael@0 | 43 | if (!suspended_) { |
| michael@0 | 44 | suspended_ = true; |
| michael@0 | 45 | NotifySuspend(); |
| michael@0 | 46 | } |
| michael@0 | 47 | break; |
| michael@0 | 48 | } |
| michael@0 | 49 | } |
| michael@0 | 50 | |
| michael@0 | 51 | void SystemMonitor::AddObserver(PowerObserver* obs) { |
| michael@0 | 52 | observer_list_->AddObserver(obs); |
| michael@0 | 53 | } |
| michael@0 | 54 | |
| michael@0 | 55 | void SystemMonitor::RemoveObserver(PowerObserver* obs) { |
| michael@0 | 56 | observer_list_->RemoveObserver(obs); |
| michael@0 | 57 | } |
| michael@0 | 58 | |
| michael@0 | 59 | void SystemMonitor::NotifyPowerStateChange() { |
| michael@0 | 60 | CHROMIUM_LOG(INFO) << "PowerStateChange: " |
| michael@0 | 61 | << (BatteryPower() ? "On" : "Off") << " battery"; |
| michael@0 | 62 | observer_list_->Notify(&PowerObserver::OnPowerStateChange, this); |
| michael@0 | 63 | } |
| michael@0 | 64 | |
| michael@0 | 65 | void SystemMonitor::NotifySuspend() { |
| michael@0 | 66 | CHROMIUM_LOG(INFO) << "Power Suspending"; |
| michael@0 | 67 | observer_list_->Notify(&PowerObserver::OnSuspend, this); |
| michael@0 | 68 | } |
| michael@0 | 69 | |
| michael@0 | 70 | void SystemMonitor::NotifyResume() { |
| michael@0 | 71 | CHROMIUM_LOG(INFO) << "Power Resuming"; |
| michael@0 | 72 | observer_list_->Notify(&PowerObserver::OnResume, this); |
| michael@0 | 73 | } |
| michael@0 | 74 | |
| michael@0 | 75 | void SystemMonitor::Start() { |
| michael@0 | 76 | #if defined(ENABLE_BATTERY_MONITORING) |
| michael@0 | 77 | DCHECK(MessageLoop::current()); // Can't call start too early. |
| michael@0 | 78 | SystemMonitor* monitor = Get(); |
| michael@0 | 79 | monitor->delayed_battery_check_.Start( |
| michael@0 | 80 | TimeDelta::FromMilliseconds(kDelayedBatteryCheckMs), monitor, |
| michael@0 | 81 | &SystemMonitor::BatteryCheck); |
| michael@0 | 82 | #endif // defined(ENABLE_BATTERY_MONITORING) |
| michael@0 | 83 | } |
| michael@0 | 84 | |
| michael@0 | 85 | void SystemMonitor::BatteryCheck() { |
| michael@0 | 86 | ProcessPowerMessage(SystemMonitor::POWER_STATE_EVENT); |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | } // namespace base |
