1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/power/PowerManagerService.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,250 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "mozilla/dom/ContentParent.h"
1.10 +#include "mozilla/Hal.h"
1.11 +#include "mozilla/HalWakeLock.h"
1.12 +#include "mozilla/ClearOnShutdown.h"
1.13 +#include "mozilla/Preferences.h"
1.14 +#include "mozilla/Services.h"
1.15 +#include "nsIDOMWakeLockListener.h"
1.16 +#include "nsIDOMWindow.h"
1.17 +#include "nsIObserverService.h"
1.18 +#include "PowerManagerService.h"
1.19 +#include "WakeLock.h"
1.20 +
1.21 +// For _exit().
1.22 +#ifdef XP_WIN
1.23 +#include <process.h>
1.24 +#else
1.25 +#include <unistd.h>
1.26 +#endif
1.27 +
1.28 +#ifdef ANDROID
1.29 +#include <android/log.h>
1.30 +extern "C" char* PrintJSStack();
1.31 +static void LogFunctionAndJSStack(const char* funcname) {
1.32 + char *jsstack = PrintJSStack();
1.33 + __android_log_print(ANDROID_LOG_INFO, "PowerManagerService", \
1.34 + "Call to %s. The JS stack is:\n%s\n",
1.35 + funcname,
1.36 + jsstack ? jsstack : "<no JS stack>");
1.37 +}
1.38 +// bug 839452
1.39 +#define LOG_FUNCTION_AND_JS_STACK() \
1.40 + LogFunctionAndJSStack(__PRETTY_FUNCTION__);
1.41 +#else
1.42 +#define LOG_FUNCTION_AND_JS_STACK()
1.43 +#endif
1.44 +
1.45 +namespace mozilla {
1.46 +namespace dom {
1.47 +namespace power {
1.48 +
1.49 +using namespace hal;
1.50 +
1.51 +NS_IMPL_ISUPPORTS(PowerManagerService, nsIPowerManagerService)
1.52 +
1.53 +/* static */ StaticRefPtr<PowerManagerService> PowerManagerService::sSingleton;
1.54 +
1.55 +/* static */ already_AddRefed<PowerManagerService>
1.56 +PowerManagerService::GetInstance()
1.57 +{
1.58 + if (!sSingleton) {
1.59 + sSingleton = new PowerManagerService();
1.60 + sSingleton->Init();
1.61 + ClearOnShutdown(&sSingleton);
1.62 + }
1.63 +
1.64 + nsRefPtr<PowerManagerService> service = sSingleton.get();
1.65 + return service.forget();
1.66 +}
1.67 +
1.68 +void
1.69 +PowerManagerService::Init()
1.70 +{
1.71 + RegisterWakeLockObserver(this);
1.72 +
1.73 + // NB: default to *enabling* the watchdog even when the pref is
1.74 + // absent, in case the profile might be damaged and we need to
1.75 + // restart to repair it.
1.76 + mWatchdogTimeoutSecs =
1.77 + Preferences::GetInt("shutdown.watchdog.timeoutSecs", 5);
1.78 +}
1.79 +
1.80 +PowerManagerService::~PowerManagerService()
1.81 +{
1.82 + UnregisterWakeLockObserver(this);
1.83 +}
1.84 +
1.85 +void
1.86 +PowerManagerService::ComputeWakeLockState(const WakeLockInformation& aWakeLockInfo,
1.87 + nsAString &aState)
1.88 +{
1.89 + WakeLockState state = hal::ComputeWakeLockState(aWakeLockInfo.numLocks(),
1.90 + aWakeLockInfo.numHidden());
1.91 + switch (state) {
1.92 + case WAKE_LOCK_STATE_UNLOCKED:
1.93 + aState.AssignLiteral("unlocked");
1.94 + break;
1.95 + case WAKE_LOCK_STATE_HIDDEN:
1.96 + aState.AssignLiteral("locked-background");
1.97 + break;
1.98 + case WAKE_LOCK_STATE_VISIBLE:
1.99 + aState.AssignLiteral("locked-foreground");
1.100 + break;
1.101 + }
1.102 +}
1.103 +
1.104 +void
1.105 +PowerManagerService::Notify(const WakeLockInformation& aWakeLockInfo)
1.106 +{
1.107 + nsAutoString state;
1.108 + ComputeWakeLockState(aWakeLockInfo, state);
1.109 +
1.110 + /**
1.111 + * Copy the listeners list before we walk through the callbacks
1.112 + * because the callbacks may install new listeners. We expect no
1.113 + * more than one listener per window, so it shouldn't be too long.
1.114 + */
1.115 + nsAutoTArray<nsCOMPtr<nsIDOMMozWakeLockListener>, 2> listeners(mWakeLockListeners);
1.116 +
1.117 + for (uint32_t i = 0; i < listeners.Length(); ++i) {
1.118 + listeners[i]->Callback(aWakeLockInfo.topic(), state);
1.119 + }
1.120 +}
1.121 +
1.122 +void
1.123 +PowerManagerService::SyncProfile()
1.124 +{
1.125 + nsCOMPtr<nsIObserverService> obsServ = services::GetObserverService();
1.126 + if (obsServ) {
1.127 + NS_NAMED_LITERAL_STRING(context, "shutdown-persist");
1.128 + obsServ->NotifyObservers(nullptr, "profile-change-net-teardown", context.get());
1.129 + obsServ->NotifyObservers(nullptr, "profile-change-teardown", context.get());
1.130 + obsServ->NotifyObservers(nullptr, "profile-before-change", context.get());
1.131 + obsServ->NotifyObservers(nullptr, "profile-before-change2", context.get());
1.132 + }
1.133 +}
1.134 +
1.135 +NS_IMETHODIMP
1.136 +PowerManagerService::Reboot()
1.137 +{
1.138 + LOG_FUNCTION_AND_JS_STACK() // bug 839452
1.139 +
1.140 + StartForceQuitWatchdog(eHalShutdownMode_Reboot, mWatchdogTimeoutSecs);
1.141 + // To synchronize any unsaved user data before rebooting.
1.142 + SyncProfile();
1.143 + hal::Reboot();
1.144 + MOZ_CRASH("hal::Reboot() shouldn't return");
1.145 +}
1.146 +
1.147 +NS_IMETHODIMP
1.148 +PowerManagerService::PowerOff()
1.149 +{
1.150 + LOG_FUNCTION_AND_JS_STACK() // bug 839452
1.151 +
1.152 + StartForceQuitWatchdog(eHalShutdownMode_PowerOff, mWatchdogTimeoutSecs);
1.153 + // To synchronize any unsaved user data before powering off.
1.154 + SyncProfile();
1.155 + hal::PowerOff();
1.156 + MOZ_CRASH("hal::PowerOff() shouldn't return");
1.157 +}
1.158 +
1.159 +NS_IMETHODIMP
1.160 +PowerManagerService::Restart()
1.161 +{
1.162 + LOG_FUNCTION_AND_JS_STACK() // bug 839452
1.163 +
1.164 + // FIXME/bug 796826 this implementation is currently gonk-specific,
1.165 + // because it relies on the Gonk to initialize the Gecko processes to
1.166 + // restart B2G. It's better to do it here to have a real "restart".
1.167 + StartForceQuitWatchdog(eHalShutdownMode_Restart, mWatchdogTimeoutSecs);
1.168 + // Ensure all content processes are dead before we continue
1.169 + // restarting. This code is used to restart to apply updates, and
1.170 + // if we don't join all the subprocesses, race conditions can cause
1.171 + // them to see an inconsistent view of the application directory.
1.172 + ContentParent::JoinAllSubprocesses();
1.173 +
1.174 + // To synchronize any unsaved user data before restarting.
1.175 + SyncProfile();
1.176 +#ifdef XP_UNIX
1.177 + sync();
1.178 +#endif
1.179 + _exit(0);
1.180 + MOZ_CRASH("_exit() shouldn't return");
1.181 +}
1.182 +
1.183 +NS_IMETHODIMP
1.184 +PowerManagerService::AddWakeLockListener(nsIDOMMozWakeLockListener *aListener)
1.185 +{
1.186 + if (mWakeLockListeners.Contains(aListener))
1.187 + return NS_OK;
1.188 +
1.189 + mWakeLockListeners.AppendElement(aListener);
1.190 + return NS_OK;
1.191 +}
1.192 +
1.193 +NS_IMETHODIMP
1.194 +PowerManagerService::RemoveWakeLockListener(nsIDOMMozWakeLockListener *aListener)
1.195 +{
1.196 + mWakeLockListeners.RemoveElement(aListener);
1.197 + return NS_OK;
1.198 +}
1.199 +
1.200 +NS_IMETHODIMP
1.201 +PowerManagerService::GetWakeLockState(const nsAString &aTopic, nsAString &aState)
1.202 +{
1.203 + WakeLockInformation info;
1.204 + GetWakeLockInfo(aTopic, &info);
1.205 +
1.206 + ComputeWakeLockState(info, aState);
1.207 +
1.208 + return NS_OK;
1.209 +}
1.210 +
1.211 +already_AddRefed<WakeLock>
1.212 +PowerManagerService::NewWakeLock(const nsAString& aTopic,
1.213 + nsIDOMWindow* aWindow,
1.214 + mozilla::ErrorResult& aRv)
1.215 +{
1.216 + nsRefPtr<WakeLock> wakelock = new WakeLock();
1.217 + aRv = wakelock->Init(aTopic, aWindow);
1.218 + if (aRv.Failed()) {
1.219 + return nullptr;
1.220 + }
1.221 +
1.222 + return wakelock.forget();
1.223 +}
1.224 +
1.225 +NS_IMETHODIMP
1.226 +PowerManagerService::NewWakeLock(const nsAString &aTopic,
1.227 + nsIDOMWindow *aWindow,
1.228 + nsISupports **aWakeLock)
1.229 +{
1.230 + mozilla::ErrorResult rv;
1.231 + nsRefPtr<WakeLock> wakelock = NewWakeLock(aTopic, aWindow, rv);
1.232 + if (rv.Failed()) {
1.233 + return rv.ErrorCode();
1.234 + }
1.235 +
1.236 + nsCOMPtr<nsIDOMEventListener> eventListener = wakelock.get();
1.237 + eventListener.forget(aWakeLock);
1.238 + return NS_OK;
1.239 +}
1.240 +
1.241 +already_AddRefed<WakeLock>
1.242 +PowerManagerService::NewWakeLockOnBehalfOfProcess(const nsAString& aTopic,
1.243 + ContentParent* aContentParent)
1.244 +{
1.245 + nsRefPtr<WakeLock> wakelock = new WakeLock();
1.246 + nsresult rv = wakelock->Init(aTopic, aContentParent);
1.247 + NS_ENSURE_SUCCESS(rv, nullptr);
1.248 + return wakelock.forget();
1.249 +}
1.250 +
1.251 +} // power
1.252 +} // dom
1.253 +} // mozilla
