/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim:expandtab:shiftwidth=2:tabstop=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 "nsIdleService.h" #include "nsString.h" #include "nsIObserverService.h" #include "nsIServiceManager.h" #include "nsDebug.h" #include "nsCOMArray.h" #include "nsXULAppAPI.h" #include "prinrval.h" #include "mozilla/Logging.h" #include "prtime.h" #include "mozilla/dom/ContentChild.h" #include "mozilla/Services.h" #include "mozilla/Preferences.h" #include "mozilla/Telemetry.h" #include <algorithm> #ifdef MOZ_WIDGET_ANDROID #include <android/log.h> #endif using namespace mozilla; // interval in milliseconds between internal idle time requests. #define MIN_IDLE_POLL_INTERVAL_MSEC (5 * PR_MSEC_PER_SEC) /* 5 sec */ // After the twenty four hour period expires for an idle daily, this is the // amount of idle time we wait for before actually firing the idle-daily // event. #define DAILY_SIGNIFICANT_IDLE_SERVICE_SEC (3 * 60) // In cases where it's been longer than twenty four hours since the last // idle-daily, this is the shortend amount of idle time we wait for before // firing the idle-daily event. #define DAILY_SHORTENED_IDLE_SERVICE_SEC 60 // Pref for last time (seconds since epoch) daily notification was sent. #define PREF_LAST_DAILY "idle.lastDailyNotification" // Number of seconds in a day. #define SECONDS_PER_DAY 86400 // MAX_DELTA_SEC * 1000 should be less than UINT32_MAX to prevent overflow on // converting from sec to msec #define MAX_DELTA_SEC (SECONDS_PER_DAY * 10) static PRLogModuleInfo *sLog = nullptr; #define LOG_TAG "GeckoIdleService" #define LOG_LEVEL ANDROID_LOG_DEBUG // Use this to find previously added observers in our array: class IdleListenerComparator { public: bool Equals(IdleListener a, IdleListener b) const { return (a.observer == b.observer) && (a.reqIdleTime == b.reqIdleTime); } }; //////////////////////////////////////////////////////////////////////////////// //// nsIdleServiceDaily NS_IMPL_ISUPPORTS(nsIdleServiceDaily, nsIObserver, nsISupportsWeakReference) NS_IMETHODIMP nsIdleServiceDaily::Observe(nsISupports *, const char *aTopic, const char16_t *) { MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: Observe '%s' (%d)", aTopic, mShutdownInProgress)); if (strcmp(aTopic, "profile-after-change") == 0) { // We are back. Start sending notifications again. mShutdownInProgress = false; return NS_OK; } if (strcmp(aTopic, "xpcom-will-shutdown") == 0 || strcmp(aTopic, "profile-change-teardown") == 0) { mShutdownInProgress = true; } if (mShutdownInProgress || strcmp(aTopic, OBSERVER_TOPIC_ACTIVE) == 0) { return NS_OK; } MOZ_ASSERT(strcmp(aTopic, OBSERVER_TOPIC_IDLE) == 0); MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: Notifying idle-daily observers")); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Notifying idle-daily observers"); #endif // Send the idle-daily observer event nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService(); NS_ENSURE_STATE(observerService); (void)observerService->NotifyObservers(nullptr, OBSERVER_TOPIC_IDLE_DAILY, nullptr); // Notify the category observers. nsCOMArray<nsIObserver> entries; mCategoryObservers.GetEntries(entries); for (int32_t i = 0; i < entries.Count(); ++i) { (void)entries[i]->Observe(nullptr, OBSERVER_TOPIC_IDLE_DAILY, nullptr); } // Stop observing idle for today. (void)mIdleService->RemoveIdleObserver(this, mIdleDailyTriggerWait); // Set the last idle-daily time pref. int32_t nowSec = static_cast<int32_t>(PR_Now() / PR_USEC_PER_SEC); Preferences::SetInt(PREF_LAST_DAILY, nowSec); // Force that to be stored so we don't retrigger twice a day under // any circumstances. nsIPrefService* prefs = Preferences::GetService(); if (prefs) { prefs->SavePrefFile(nullptr); } MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: Storing last idle time as %d sec.", nowSec)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Storing last idle time as %d", nowSec); #endif // Note the moment we expect to get the next timer callback mExpectedTriggerTime = PR_Now() + ((PRTime)SECONDS_PER_DAY * (PRTime)PR_USEC_PER_SEC); MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: Restarting daily timer")); // Start timer for the next check in one day. (void)mTimer->InitWithFuncCallback(DailyCallback, this, SECONDS_PER_DAY * PR_MSEC_PER_SEC, nsITimer::TYPE_ONE_SHOT); return NS_OK; } nsIdleServiceDaily::nsIdleServiceDaily(nsIIdleService* aIdleService) : mIdleService(aIdleService) , mTimer(do_CreateInstance(NS_TIMER_CONTRACTID)) , mCategoryObservers(OBSERVER_TOPIC_IDLE_DAILY) , mShutdownInProgress(false) , mExpectedTriggerTime(0) , mIdleDailyTriggerWait(DAILY_SIGNIFICANT_IDLE_SERVICE_SEC) { } void nsIdleServiceDaily::Init() { // First check the time of the last idle-daily event notification. If it // has been 24 hours or higher, or if we have never sent an idle-daily, // get ready to send an idle-daily event. Otherwise set a timer targeted // at 24 hours past the last idle-daily we sent. int32_t nowSec = static_cast<int32_t>(PR_Now() / PR_USEC_PER_SEC); int32_t lastDaily = Preferences::GetInt(PREF_LAST_DAILY, 0); if (lastDaily < 0 || lastDaily > nowSec) { // The time is bogus, use default. lastDaily = 0; } int32_t secondsSinceLastDaily = nowSec - lastDaily; MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: Init: seconds since last daily: %d", secondsSinceLastDaily)); // If it has been twenty four hours or more or if we have never sent an // idle-daily event get ready to send it during the next idle period. if (secondsSinceLastDaily > SECONDS_PER_DAY) { // Check for a "long wait", e.g. 48-hours or more. bool hasBeenLongWait = (lastDaily && (secondsSinceLastDaily > (SECONDS_PER_DAY * 2))); MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: has been long wait? %d", hasBeenLongWait)); // StageIdleDaily sets up a wait for the user to become idle and then // sends the idle-daily event. StageIdleDaily(hasBeenLongWait); } else { MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: Setting timer a day from now")); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Setting timer a day from now"); #endif // According to our last idle-daily pref, the last idle-daily was fired // less then 24 hours ago. Set a wait for the amount of time remaining. int32_t milliSecLeftUntilDaily = (SECONDS_PER_DAY - secondsSinceLastDaily) * PR_MSEC_PER_SEC; MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: Seconds till next timeout: %d", (SECONDS_PER_DAY - secondsSinceLastDaily))); // Mark the time at which we expect this to fire. On systems with faulty // timers, we need to be able to cross check that the timer fired at the // expected time. mExpectedTriggerTime = PR_Now() + (milliSecLeftUntilDaily * PR_USEC_PER_MSEC); (void)mTimer->InitWithFuncCallback(DailyCallback, this, milliSecLeftUntilDaily, nsITimer::TYPE_ONE_SHOT); } // Register for when we should terminate/pause nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); if (obs) { MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: Registering for system event observers.")); obs->AddObserver(this, "xpcom-will-shutdown", true); obs->AddObserver(this, "profile-change-teardown", true); obs->AddObserver(this, "profile-after-change", true); } } nsIdleServiceDaily::~nsIdleServiceDaily() { if (mTimer) { mTimer->Cancel(); mTimer = nullptr; } } void nsIdleServiceDaily::StageIdleDaily(bool aHasBeenLongWait) { NS_ASSERTION(mIdleService, "No idle service available?"); MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: Registering Idle observer callback " "(short wait requested? %d)", aHasBeenLongWait)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Registering Idle observer callback"); #endif mIdleDailyTriggerWait = (aHasBeenLongWait ? DAILY_SHORTENED_IDLE_SERVICE_SEC : DAILY_SIGNIFICANT_IDLE_SERVICE_SEC); (void)mIdleService->AddIdleObserver(this, mIdleDailyTriggerWait); } // static void nsIdleServiceDaily::DailyCallback(nsITimer* aTimer, void* aClosure) { MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: DailyCallback running")); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "DailyCallback running"); #endif nsIdleServiceDaily* self = static_cast<nsIdleServiceDaily*>(aClosure); // Check to be sure the timer didn't fire early. This currently only // happens on android. PRTime now = PR_Now(); if (self->mExpectedTriggerTime && now < self->mExpectedTriggerTime) { // Timer returned early, reschedule to the appropriate time. PRTime delayTime = self->mExpectedTriggerTime - now; // Add 10 ms to ensure we don't undershoot, and never get a "0" timer. delayTime += 10 * PR_USEC_PER_MSEC; MOZ_LOG(sLog, LogLevel::Debug, ("nsIdleServiceDaily: DailyCallback resetting timer to %lld msec", delayTime / PR_USEC_PER_MSEC)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "DailyCallback resetting timer to %lld msec", delayTime / PR_USEC_PER_MSEC); #endif (void)self->mTimer->InitWithFuncCallback(DailyCallback, self, delayTime / PR_USEC_PER_MSEC, nsITimer::TYPE_ONE_SHOT); return; } // Register for a short term wait for idle event. When this fires we fire // our idle-daily event. self->StageIdleDaily(false); } /** * The idle services goal is to notify subscribers when a certain time has * passed since the last user interaction with the system. * * On some platforms this is defined as the last time user events reached this * application, on other platforms it is a system wide thing - the preferred * implementation is to use the system idle time, rather than the application * idle time, as the things depending on the idle service are likely to use * significant resources (network, disk, memory, cpu, etc.). * * When the idle service needs to use the system wide idle timer, it typically * needs to poll the idle time value by the means of a timer. It needs to * poll fast when it is in active idle mode (when it has a listener in the idle * mode) as it needs to detect if the user is active in other applications. * * When the service is waiting for the first listener to become idle, or when * it is only monitoring application idle time, it only needs to have the timer * expire at the time the next listener goes idle. * * The core state of the service is determined by: * * - A list of listeners. * * - A boolean that tells if any listeners are in idle mode. * * - A delta value that indicates when, measured from the last non-idle time, * the next listener should switch to idle mode. * * - An absolute time of the last time idle mode was detected (this is used to * judge if we have been out of idle mode since the last invocation of the * service. * * There are four entry points into the system: * * - A new listener is registered. * * - An existing listener is deregistered. * * - User interaction is detected. * * - The timer expires. * * When a new listener is added its idle timeout, is compared with the next idle * timeout, and if lower, that time is stored as the new timeout, and the timer * is reconfigured to ensure a timeout around the time the new listener should * timeout. * * If the next idle time is above the idle time requested by the new listener * it won't be informed until the timer expires, this is to avoid recursive * behavior and to simplify the code. In this case the timer will be set to * about 10 ms. * * When an existing listener is deregistered, it is just removed from the list * of active listeners, we don't stop the timer, we just let it expire. * * When user interaction is detected, either because it was directly detected or * because we polled the system timer and found it to be unexpected low, then we * check the flag that tells us if any listeners are in idle mode, if there are * they are removed from idle mode and told so, and we reset our state * caculating the next timeout and restart the timer if needed. * * ---- Build in logic * * In order to avoid restarting the timer endlessly, the timer function has * logic that will only restart the timer, if the requested timeout is before * the current timeout. * */ //////////////////////////////////////////////////////////////////////////////// //// nsIdleService namespace { nsIdleService* gIdleService; } // namespace already_AddRefed<nsIdleService> nsIdleService::GetInstance() { RefPtr<nsIdleService> instance(gIdleService); return instance.forget(); } nsIdleService::nsIdleService() : mCurrentlySetToTimeoutAt(TimeStamp()), mIdleObserverCount(0), mDeltaToNextIdleSwitchInS(MAX_DELTA_SEC), mLastUserInteraction(TimeStamp::Now()) { if (sLog == nullptr) sLog = PR_NewLogModule("idleService"); MOZ_ASSERT(!gIdleService); gIdleService = this; if (XRE_IsParentProcess()) { mDailyIdle = new nsIdleServiceDaily(this); mDailyIdle->Init(); } } nsIdleService::~nsIdleService() { if(mTimer) { mTimer->Cancel(); } MOZ_ASSERT(gIdleService == this); gIdleService = nullptr; } NS_IMPL_ISUPPORTS(nsIdleService, nsIIdleService, nsIIdleServiceInternal) NS_IMETHODIMP nsIdleService::AddIdleObserver(nsIObserver* aObserver, uint32_t aIdleTimeInS) { NS_ENSURE_ARG_POINTER(aObserver); // We don't accept idle time at 0, and we can't handle idle time that are too // high either - no more than ~136 years. NS_ENSURE_ARG_RANGE(aIdleTimeInS, 1, (UINT32_MAX / 10) - 1); if (XRE_IsContentProcess()) { dom::ContentChild* cpc = dom::ContentChild::GetSingleton(); cpc->AddIdleObserver(aObserver, aIdleTimeInS); return NS_OK; } MOZ_LOG(sLog, LogLevel::Debug, ("idleService: Register idle observer %p for %d seconds", aObserver, aIdleTimeInS)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Register idle observer %p for %d seconds", aObserver, aIdleTimeInS); #endif // Put the time + observer in a struct we can keep: IdleListener listener(aObserver, aIdleTimeInS); if (!mArrayListeners.AppendElement(listener)) { return NS_ERROR_OUT_OF_MEMORY; } // Create our timer callback if it's not there already. if (!mTimer) { nsresult rv; mTimer = do_CreateInstance(NS_TIMER_CONTRACTID, &rv); NS_ENSURE_SUCCESS(rv, rv); } // Check if the newly added observer has a smaller wait time than what we // are waiting for now. if (mDeltaToNextIdleSwitchInS > aIdleTimeInS) { // If it is, then this is the next to move to idle (at this point we // don't care if it should have switched already). MOZ_LOG(sLog, LogLevel::Debug, ("idleService: Register: adjusting next switch from %d to %d seconds", mDeltaToNextIdleSwitchInS, aIdleTimeInS)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Register: adjusting next switch from %d to %d seconds", mDeltaToNextIdleSwitchInS, aIdleTimeInS); #endif mDeltaToNextIdleSwitchInS = aIdleTimeInS; } // Ensure timer is running. ReconfigureTimer(); return NS_OK; } NS_IMETHODIMP nsIdleService::RemoveIdleObserver(nsIObserver* aObserver, uint32_t aTimeInS) { NS_ENSURE_ARG_POINTER(aObserver); NS_ENSURE_ARG(aTimeInS); if (XRE_IsContentProcess()) { dom::ContentChild* cpc = dom::ContentChild::GetSingleton(); cpc->RemoveIdleObserver(aObserver, aTimeInS); return NS_OK; } IdleListener listener(aObserver, aTimeInS); // Find the entry and remove it, if it was the last entry, we just let the // existing timer run to completion (there might be a new registration in a // little while. IdleListenerComparator c; nsTArray<IdleListener>::index_type listenerIndex = mArrayListeners.IndexOf(listener, 0, c); if (listenerIndex != mArrayListeners.NoIndex) { if (mArrayListeners.ElementAt(listenerIndex).isIdle) mIdleObserverCount--; mArrayListeners.RemoveElementAt(listenerIndex); MOZ_LOG(sLog, LogLevel::Debug, ("idleService: Remove observer %p (%d seconds), %d remain idle", aObserver, aTimeInS, mIdleObserverCount)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Remove observer %p (%d seconds), %d remain idle", aObserver, aTimeInS, mIdleObserverCount); #endif return NS_OK; } // If we get here, we haven't removed anything: MOZ_LOG(sLog, LogLevel::Warning, ("idleService: Failed to remove idle observer %p (%d seconds)", aObserver, aTimeInS)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Failed to remove idle observer %p (%d seconds)", aObserver, aTimeInS); #endif return NS_ERROR_FAILURE; } NS_IMETHODIMP nsIdleService::ResetIdleTimeOut(uint32_t idleDeltaInMS) { MOZ_LOG(sLog, LogLevel::Debug, ("idleService: Reset idle timeout (last interaction %u msec)", idleDeltaInMS)); // Store the time mLastUserInteraction = TimeStamp::Now() - TimeDuration::FromMilliseconds(idleDeltaInMS); // If no one is idle, then we are done, any existing timers can keep running. if (mIdleObserverCount == 0) { MOZ_LOG(sLog, LogLevel::Debug, ("idleService: Reset idle timeout: no idle observers")); return NS_OK; } // Mark all idle services as non-idle, and calculate the next idle timeout. nsCOMArray<nsIObserver> notifyList; mDeltaToNextIdleSwitchInS = MAX_DELTA_SEC; // Loop through all listeners, and find any that have detected idle. for (uint32_t i = 0; i < mArrayListeners.Length(); i++) { IdleListener& curListener = mArrayListeners.ElementAt(i); // If the listener was idle, then he shouldn't be any longer. if (curListener.isIdle) { notifyList.AppendObject(curListener.observer); curListener.isIdle = false; } // Check if the listener is the next one to timeout. mDeltaToNextIdleSwitchInS = std::min(mDeltaToNextIdleSwitchInS, curListener.reqIdleTime); } // When we are done, then we wont have anyone idle. mIdleObserverCount = 0; // Restart the idle timer, and do so before anyone can delay us. ReconfigureTimer(); int32_t numberOfPendingNotifications = notifyList.Count(); // Bail if nothing to do. if (!numberOfPendingNotifications) { return NS_OK; } // Now send "active" events to all, if any should have timed out already, // then they will be reawaken by the timer that is already running. // We need a text string to send with any state change events. nsAutoString timeStr; timeStr.AppendInt((int32_t)(idleDeltaInMS / PR_MSEC_PER_SEC)); // Send the "non-idle" events. while (numberOfPendingNotifications--) { MOZ_LOG(sLog, LogLevel::Debug, ("idleService: Reset idle timeout: tell observer %p user is back", notifyList[numberOfPendingNotifications])); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Reset idle timeout: tell observer %p user is back", notifyList[numberOfPendingNotifications]); #endif notifyList[numberOfPendingNotifications]->Observe(this, OBSERVER_TOPIC_ACTIVE, timeStr.get()); } return NS_OK; } NS_IMETHODIMP nsIdleService::GetIdleTime(uint32_t* idleTime) { // Check sanity of in parameter. if (!idleTime) { return NS_ERROR_NULL_POINTER; } // Polled idle time in ms. uint32_t polledIdleTimeMS; bool polledIdleTimeIsValid = PollIdleTime(&polledIdleTimeMS); MOZ_LOG(sLog, LogLevel::Debug, ("idleService: Get idle time: polled %u msec, valid = %d", polledIdleTimeMS, polledIdleTimeIsValid)); // timeSinceReset is in milliseconds. TimeDuration timeSinceReset = TimeStamp::Now() - mLastUserInteraction; uint32_t timeSinceResetInMS = timeSinceReset.ToMilliseconds(); MOZ_LOG(sLog, LogLevel::Debug, ("idleService: Get idle time: time since reset %u msec", timeSinceResetInMS)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Get idle time: time since reset %u msec", timeSinceResetInMS); #endif // If we did't get pulled data, return the time since last idle reset. if (!polledIdleTimeIsValid) { // We need to convert to ms before returning the time. *idleTime = timeSinceResetInMS; return NS_OK; } // Otherwise return the shortest time detected (in ms). *idleTime = std::min(timeSinceResetInMS, polledIdleTimeMS); return NS_OK; } bool nsIdleService::PollIdleTime(uint32_t* /*aIdleTime*/) { // Default behavior is not to have the ability to poll an idle time. return false; } bool nsIdleService::UsePollMode() { uint32_t dummy; return PollIdleTime(&dummy); } void nsIdleService::StaticIdleTimerCallback(nsITimer* aTimer, void* aClosure) { static_cast<nsIdleService*>(aClosure)->IdleTimerCallback(); } void nsIdleService::IdleTimerCallback(void) { // Remember that we no longer have a timer running. mCurrentlySetToTimeoutAt = TimeStamp(); // Find the last detected idle time. uint32_t lastIdleTimeInMS = static_cast<uint32_t>((TimeStamp::Now() - mLastUserInteraction).ToMilliseconds()); // Get the current idle time. uint32_t currentIdleTimeInMS; if (NS_FAILED(GetIdleTime(¤tIdleTimeInMS))) { MOZ_LOG(sLog, LogLevel::Info, ("idleService: Idle timer callback: failed to get idle time")); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Idle timer callback: failed to get idle time"); #endif return; } MOZ_LOG(sLog, LogLevel::Debug, ("idleService: Idle timer callback: current idle time %u msec", currentIdleTimeInMS)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Idle timer callback: current idle time %u msec", currentIdleTimeInMS); #endif // Check if we have had some user interaction we didn't handle previously // we do the calculation in ms to lessen the chance for rounding errors to // trigger wrong results. if (lastIdleTimeInMS > currentIdleTimeInMS) { // We had user activity, so handle that part first (to ensure the listeners // don't risk getting an non-idle after they get a new idle indication. ResetIdleTimeOut(currentIdleTimeInMS); // NOTE: We can't bail here, as we might have something already timed out. } // Find the idle time in S. uint32_t currentIdleTimeInS = currentIdleTimeInMS / PR_MSEC_PER_SEC; // Restart timer and bail if no-one are expected to be in idle if (mDeltaToNextIdleSwitchInS > currentIdleTimeInS) { // If we didn't expect anyone to be idle, then just re-start the timer. ReconfigureTimer(); return; } // We need to initialise the time to the next idle switch. mDeltaToNextIdleSwitchInS = MAX_DELTA_SEC; // Create list of observers that should be notified. nsCOMArray<nsIObserver> notifyList; for (uint32_t i = 0; i < mArrayListeners.Length(); i++) { IdleListener& curListener = mArrayListeners.ElementAt(i); // We are only interested in items, that are not in the idle state. if (!curListener.isIdle) { // If they have an idle time smaller than the actual idle time. if (curListener.reqIdleTime <= currentIdleTimeInS) { // Then add the listener to the list of listeners that should be // notified. notifyList.AppendObject(curListener.observer); // This listener is now idle. curListener.isIdle = true; // Remember we have someone idle. mIdleObserverCount++; } else { // Listeners that are not timed out yet are candidates for timing out. mDeltaToNextIdleSwitchInS = std::min(mDeltaToNextIdleSwitchInS, curListener.reqIdleTime); } } } // Restart the timer before any notifications that could slow us down are // done. ReconfigureTimer(); int32_t numberOfPendingNotifications = notifyList.Count(); // Bail if nothing to do. if (!numberOfPendingNotifications) { MOZ_LOG(sLog, LogLevel::Debug, ("idleService: **** Idle timer callback: no observers to message.")); return; } // We need a text string to send with any state change events. nsAutoString timeStr; timeStr.AppendInt(currentIdleTimeInS); // Notify all listeners that just timed out. while (numberOfPendingNotifications--) { MOZ_LOG(sLog, LogLevel::Debug, ("idleService: **** Idle timer callback: tell observer %p user is idle", notifyList[numberOfPendingNotifications])); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "Idle timer callback: tell observer %p user is idle", notifyList[numberOfPendingNotifications]); #endif notifyList[numberOfPendingNotifications]->Observe(this, OBSERVER_TOPIC_IDLE, timeStr.get()); } } void nsIdleService::SetTimerExpiryIfBefore(TimeStamp aNextTimeout) { TimeDuration nextTimeoutDuration = aNextTimeout - TimeStamp::Now(); MOZ_LOG(sLog, LogLevel::Debug, ("idleService: SetTimerExpiryIfBefore: next timeout %0.f msec from now", nextTimeoutDuration.ToMilliseconds())); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "SetTimerExpiryIfBefore: next timeout %0.f msec from now", nextTimeoutDuration.ToMilliseconds()); #endif // Bail if we don't have a timer service. if (!mTimer) { return; } // If the new timeout is before the old one or we don't have a timer running, // then restart the timer. if (mCurrentlySetToTimeoutAt.IsNull() || mCurrentlySetToTimeoutAt > aNextTimeout) { mCurrentlySetToTimeoutAt = aNextTimeout; // Stop the current timer (it's ok to try'n stop it, even it isn't running). mTimer->Cancel(); // Check that the timeout is actually in the future, otherwise make it so. TimeStamp currentTime = TimeStamp::Now(); if (currentTime > mCurrentlySetToTimeoutAt) { mCurrentlySetToTimeoutAt = currentTime; } // Add 10 ms to ensure we don't undershoot, and never get a "0" timer. mCurrentlySetToTimeoutAt += TimeDuration::FromMilliseconds(10); TimeDuration deltaTime = mCurrentlySetToTimeoutAt - currentTime; MOZ_LOG(sLog, LogLevel::Debug, ("idleService: IdleService reset timer expiry to %0.f msec from now", deltaTime.ToMilliseconds())); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "reset timer expiry to %0.f msec from now", deltaTime.ToMilliseconds()); #endif // Start the timer mTimer->InitWithFuncCallback(StaticIdleTimerCallback, this, deltaTime.ToMilliseconds(), nsITimer::TYPE_ONE_SHOT); } } void nsIdleService::ReconfigureTimer(void) { // Check if either someone is idle, or someone will become idle. if ((mIdleObserverCount == 0) && MAX_DELTA_SEC == mDeltaToNextIdleSwitchInS) { // If not, just let any existing timers run to completion // And bail out. MOZ_LOG(sLog, LogLevel::Debug, ("idleService: ReconfigureTimer: no idle or waiting observers")); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "ReconfigureTimer: no idle or waiting observers"); #endif return; } // Find the next timeout value, assuming we are not polling. // We need to store the current time, so we don't get artifacts from the time // ticking while we are processing. TimeStamp curTime = TimeStamp::Now(); TimeStamp nextTimeoutAt = mLastUserInteraction + TimeDuration::FromSeconds(mDeltaToNextIdleSwitchInS); TimeDuration nextTimeoutDuration = nextTimeoutAt - curTime; MOZ_LOG(sLog, LogLevel::Debug, ("idleService: next timeout %0.f msec from now", nextTimeoutDuration.ToMilliseconds())); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "next timeout %0.f msec from now", nextTimeoutDuration.ToMilliseconds()); #endif // Check if we should correct the timeout time because we should poll before. if ((mIdleObserverCount > 0) && UsePollMode()) { TimeStamp pollTimeout = curTime + TimeDuration::FromMilliseconds(MIN_IDLE_POLL_INTERVAL_MSEC); if (nextTimeoutAt > pollTimeout) { MOZ_LOG(sLog, LogLevel::Debug, ("idleService: idle observers, reducing timeout to %lu msec from now", MIN_IDLE_POLL_INTERVAL_MSEC)); #ifdef MOZ_WIDGET_ANDROID __android_log_print(LOG_LEVEL, LOG_TAG, "idle observers, reducing timeout to %lu msec from now", MIN_IDLE_POLL_INTERVAL_MSEC); #endif nextTimeoutAt = pollTimeout; } } SetTimerExpiryIfBefore(nextTimeoutAt); }