The Tor Browser: dom/power/PowerManagerService.cpp@6474c204b198 (annotated)

dom/power/PowerManagerService.cpp@6474c204b198 (annotated)

dom/power/PowerManagerService.cpp

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.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "mozilla/dom/ContentParent.h"
 #include "mozilla/Hal.h"
 #include "mozilla/HalWakeLock.h"
 #include "mozilla/ClearOnShutdown.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/Services.h"
 #include "nsIDOMWakeLockListener.h"
 #include "nsIDOMWindow.h"
 #include "nsIObserverService.h"
 #include "PowerManagerService.h"
 #include "WakeLock.h"
 // For _exit().
 #ifdef XP_WIN
 #include <process.h>
 #else
 #include <unistd.h>
 #endif
 #ifdef ANDROID
 #include <android/log.h>
 extern "C" char* PrintJSStack();
 static void LogFunctionAndJSStack(const char* funcname) {
   char *jsstack = PrintJSStack();
   __android_log_print(ANDROID_LOG_INFO, "PowerManagerService", \
                       "Call to %s. The JS stack is:\n%s\n",
                       funcname,
                       jsstack ? jsstack : "<no JS stack>");
 }
 // bug 839452
 #define LOG_FUNCTION_AND_JS_STACK() \
   LogFunctionAndJSStack(__PRETTY_FUNCTION__);
 #else
 #define LOG_FUNCTION_AND_JS_STACK()
 #endif
 namespace mozilla {
 namespace dom {
 namespace power {
 using namespace hal;
 NS_IMPL_ISUPPORTS(PowerManagerService, nsIPowerManagerService)
 /* static */ StaticRefPtr<PowerManagerService> PowerManagerService::sSingleton;
 /* static */ already_AddRefed<PowerManagerService>
 PowerManagerService::GetInstance()
 {
   if (!sSingleton) {
     sSingleton = new PowerManagerService();
     sSingleton->Init();
     ClearOnShutdown(&sSingleton);
   }
   nsRefPtr<PowerManagerService> service = sSingleton.get();
   return service.forget();
 }
 void
 PowerManagerService::Init()
 {
   RegisterWakeLockObserver(this);
   // NB: default to *enabling* the watchdog even when the pref is
   // absent, in case the profile might be damaged and we need to
   // restart to repair it.
   mWatchdogTimeoutSecs =
     Preferences::GetInt("shutdown.watchdog.timeoutSecs", 5);
 }
 PowerManagerService::~PowerManagerService()
 {
   UnregisterWakeLockObserver(this);
 }
 void
 PowerManagerService::ComputeWakeLockState(const WakeLockInformation& aWakeLockInfo,
                                           nsAString &aState)
 {
   WakeLockState state = hal::ComputeWakeLockState(aWakeLockInfo.numLocks(),
                                                   aWakeLockInfo.numHidden());
   switch (state) {
   case WAKE_LOCK_STATE_UNLOCKED:
     aState.AssignLiteral("unlocked");
     break;
   case WAKE_LOCK_STATE_HIDDEN:
     aState.AssignLiteral("locked-background");
     break;
   case WAKE_LOCK_STATE_VISIBLE:
     aState.AssignLiteral("locked-foreground");
     break;
   }
 }
 void
 PowerManagerService::Notify(const WakeLockInformation& aWakeLockInfo)
 {
   nsAutoString state;
   ComputeWakeLockState(aWakeLockInfo, state);
   /**
    * Copy the listeners list before we walk through the callbacks
    * because the callbacks may install new listeners. We expect no
    * more than one listener per window, so it shouldn't be too long.
    */
   nsAutoTArray<nsCOMPtr<nsIDOMMozWakeLockListener>, 2> listeners(mWakeLockListeners);
   for (uint32_t i = 0; i < listeners.Length(); ++i) {
     listeners[i]->Callback(aWakeLockInfo.topic(), state);
   }
 }
 void
 PowerManagerService::SyncProfile()
 {
   nsCOMPtr<nsIObserverService> obsServ = services::GetObserverService();
   if (obsServ) {
     NS_NAMED_LITERAL_STRING(context, "shutdown-persist");
     obsServ->NotifyObservers(nullptr, "profile-change-net-teardown", context.get());
     obsServ->NotifyObservers(nullptr, "profile-change-teardown", context.get());
     obsServ->NotifyObservers(nullptr, "profile-before-change", context.get());
     obsServ->NotifyObservers(nullptr, "profile-before-change2", context.get());
   }
 }
 NS_IMETHODIMP
 PowerManagerService::Reboot()
 {
   LOG_FUNCTION_AND_JS_STACK() // bug 839452
   StartForceQuitWatchdog(eHalShutdownMode_Reboot, mWatchdogTimeoutSecs);
   // To synchronize any unsaved user data before rebooting.
   SyncProfile();
   hal::Reboot();
   MOZ_CRASH("hal::Reboot() shouldn't return");
 }
 NS_IMETHODIMP
 PowerManagerService::PowerOff()
 {
   LOG_FUNCTION_AND_JS_STACK() // bug 839452
   StartForceQuitWatchdog(eHalShutdownMode_PowerOff, mWatchdogTimeoutSecs);
   // To synchronize any unsaved user data before powering off.
   SyncProfile();
   hal::PowerOff();
   MOZ_CRASH("hal::PowerOff() shouldn't return");
 }
 NS_IMETHODIMP
 PowerManagerService::Restart()
 {
   LOG_FUNCTION_AND_JS_STACK() // bug 839452
   // FIXME/bug 796826 this implementation is currently gonk-specific,
   // because it relies on the Gonk to initialize the Gecko processes to
   // restart B2G. It's better to do it here to have a real "restart".
   StartForceQuitWatchdog(eHalShutdownMode_Restart, mWatchdogTimeoutSecs);
   // Ensure all content processes are dead before we continue
   // restarting.  This code is used to restart to apply updates, and
   // if we don't join all the subprocesses, race conditions can cause
   // them to see an inconsistent view of the application directory.
   ContentParent::JoinAllSubprocesses();
   // To synchronize any unsaved user data before restarting.
   SyncProfile();
 #ifdef XP_UNIX
   sync();
 #endif
   _exit(0);
   MOZ_CRASH("_exit() shouldn't return");
 }
 NS_IMETHODIMP
 PowerManagerService::AddWakeLockListener(nsIDOMMozWakeLockListener *aListener)
 {
   if (mWakeLockListeners.Contains(aListener))
     return NS_OK;
   mWakeLockListeners.AppendElement(aListener);
   return NS_OK;
 }
 NS_IMETHODIMP
 PowerManagerService::RemoveWakeLockListener(nsIDOMMozWakeLockListener *aListener)
 {
   mWakeLockListeners.RemoveElement(aListener);
   return NS_OK;
 }
 NS_IMETHODIMP
 PowerManagerService::GetWakeLockState(const nsAString &aTopic, nsAString &aState)
 {
   WakeLockInformation info;
   GetWakeLockInfo(aTopic, &info);
   ComputeWakeLockState(info, aState);
   return NS_OK;
 }
 already_AddRefed<WakeLock>
 PowerManagerService::NewWakeLock(const nsAString& aTopic,
                                  nsIDOMWindow* aWindow,
                                  mozilla::ErrorResult& aRv)
 {
   nsRefPtr<WakeLock> wakelock = new WakeLock();
   aRv = wakelock->Init(aTopic, aWindow);
   if (aRv.Failed()) {
     return nullptr;
   }
   return wakelock.forget();
 }
 NS_IMETHODIMP
 PowerManagerService::NewWakeLock(const nsAString &aTopic,
                                  nsIDOMWindow *aWindow,
                                  nsISupports **aWakeLock)
 {
   mozilla::ErrorResult rv;
   nsRefPtr<WakeLock> wakelock = NewWakeLock(aTopic, aWindow, rv);
   if (rv.Failed()) {
     return rv.ErrorCode();
   }
   nsCOMPtr<nsIDOMEventListener> eventListener = wakelock.get();
   eventListener.forget(aWakeLock);
   return NS_OK;
 }
 already_AddRefed<WakeLock>
 PowerManagerService::NewWakeLockOnBehalfOfProcess(const nsAString& aTopic,
                                                   ContentParent* aContentParent)
 {
   nsRefPtr<WakeLock> wakelock = new WakeLock();
   nsresult rv = wakelock->Init(aTopic, aContentParent);
   NS_ENSURE_SUCCESS(rv, nullptr);
   return wakelock.forget();
 }
 } // power
 } // dom
 } // mozilla

The Tor Browser / annotate

dom/power/PowerManagerService.cpp@6474c204b198 (annotated)

dom/power/PowerManagerService.cpp