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gecko-dev/widget/xpwidgets/nsIdleService.cpp

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/* -*- 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 "prlog.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
#ifdef PR_LOGGING
static PRLogModuleInfo *sLog = nullptr;
#endif
// 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_ISUPPORTS2(nsIdleServiceDaily, nsIObserver, nsISupportsWeakReference)
NS_IMETHODIMP
nsIdleServiceDaily::Observe(nsISupports *,
const char *aTopic,
const PRUnichar *)
{
PR_LOG(sLog, PR_LOG_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);
PR_LOG(sLog, PR_LOG_DEBUG,
("nsIdleServiceDaily: Notifying idle-daily observers"));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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);
}
PR_LOG(sLog, PR_LOG_DEBUG,
("nsIdleServiceDaily: Storing last idle time as %d sec.", nowSec));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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);
PR_LOG(sLog, PR_LOG_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;
PR_LOG(sLog, PR_LOG_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)));
PR_LOG(sLog, PR_LOG_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 {
PR_LOG(sLog, PR_LOG_DEBUG,
("nsIdleServiceDaily: Setting timer a day from now"));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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;
PR_LOG(sLog, PR_LOG_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) {
PR_LOG(sLog, PR_LOG_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?");
PR_LOG(sLog, PR_LOG_DEBUG,
("nsIdleServiceDaily: Registering Idle observer callback "
"(short wait requested? %d)", aHasBeenLongWait));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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)
{
PR_LOG(sLog, PR_LOG_DEBUG,
("nsIdleServiceDaily: DailyCallback running"));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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;
PR_LOG(sLog, PR_LOG_DEBUG, ("nsIdleServiceDaily: DailyCallback resetting timer to %lld msec",
delayTime / PR_USEC_PER_MSEC));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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;
}
already_AddRefed<nsIdleService>
nsIdleService::GetInstance()
{
nsRefPtr<nsIdleService> instance(gIdleService);
return instance.forget();
}
nsIdleService::nsIdleService() : mCurrentlySetToTimeoutAt(TimeStamp()),
mIdleObserverCount(0),
mDeltaToNextIdleSwitchInS(UINT32_MAX),
mLastUserInteraction(TimeStamp::Now())
{
#ifdef PR_LOGGING
if (sLog == nullptr)
sLog = PR_NewLogModule("idleService");
#endif
MOZ_ASSERT(!gIdleService);
gIdleService = this;
if (XRE_GetProcessType() == GeckoProcessType_Default) {
mDailyIdle = new nsIdleServiceDaily(this);
mDailyIdle->Init();
}
}
nsIdleService::~nsIdleService()
{
if(mTimer) {
mTimer->Cancel();
}
MOZ_ASSERT(gIdleService == this);
gIdleService = nullptr;
}
NS_IMPL_ISUPPORTS2(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_GetProcessType() == GeckoProcessType_Content) {
dom::ContentChild* cpc = dom::ContentChild::GetSingleton();
cpc->AddIdleObserver(aObserver, aIdleTimeInS);
return NS_OK;
}
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Register idle observer %x for %d seconds",
aObserver, aIdleTimeInS));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"Register idle observer %x 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).
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Register: adjusting next switch from %d to %d seconds",
mDeltaToNextIdleSwitchInS, aIdleTimeInS));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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_GetProcessType() == GeckoProcessType_Content) {
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);
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Remove observer %x (%d seconds), %d remain idle",
aObserver, aTimeInS, mIdleObserverCount));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"Remove observer %x (%d seconds), %d remain idle",
aObserver, aTimeInS, mIdleObserverCount);
#endif
return NS_OK;
}
// If we get here, we haven't removed anything:
PR_LOG(sLog, PR_LOG_WARNING,
("idleService: Failed to remove idle observer %x (%d seconds)",
aObserver, aTimeInS));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"Failed to remove idle observer %x (%d seconds)",
aObserver, aTimeInS);
#endif
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsIdleService::ResetIdleTimeOut(uint32_t idleDeltaInMS)
{
PR_LOG(sLog, PR_LOG_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) {
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Reset idle timeout: no idle observers"));
return NS_OK;
}
// Mark all idle services as non-idle, and calculate the next idle timeout.
Telemetry::AutoTimer<Telemetry::IDLE_NOTIFY_BACK_MS> timer;
nsCOMArray<nsIObserver> notifyList;
mDeltaToNextIdleSwitchInS = UINT32_MAX;
// 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();
Telemetry::Accumulate(Telemetry::IDLE_NOTIFY_BACK_LISTENERS,
numberOfPendingNotifications);
// Bail if nothing to do.
if (!numberOfPendingNotifications) {
return NS_OK;
}
// Now send "back" events to all, if any should have timed out allready, 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--) {
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Reset idle timeout: tell observer %x user is back",
notifyList[numberOfPendingNotifications]));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"Reset idle timeout: tell observer %x 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);
PR_LOG(sLog, PR_LOG_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();
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Get idle time: time since reset %u msec",
timeSinceResetInMS));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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(&currentIdleTimeInMS))) {
PR_LOG(sLog, PR_LOG_ALWAYS,
("idleService: Idle timer callback: failed to get idle time"));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"Idle timer callback: failed to get idle time");
#endif
return;
}
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Idle timer callback: current idle time %u msec",
currentIdleTimeInMS));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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;
}
// Tell expired listeners they are expired,and find the next timeout
Telemetry::AutoTimer<Telemetry::IDLE_NOTIFY_IDLE_MS> timer;
// We need to initialise the time to the next idle switch.
mDeltaToNextIdleSwitchInS = UINT32_MAX;
// 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();
Telemetry::Accumulate(Telemetry::IDLE_NOTIFY_IDLE_LISTENERS,
numberOfPendingNotifications);
// Bail if nothing to do.
if (!numberOfPendingNotifications) {
PR_LOG(sLog, PR_LOG_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--) {
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: **** Idle timer callback: tell observer %x user is idle",
notifyList[numberOfPendingNotifications]));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"Idle timer callback: tell observer %x user is idle",
notifyList[numberOfPendingNotifications]);
#endif
notifyList[numberOfPendingNotifications]->Observe(this,
OBSERVER_TOPIC_IDLE,
timeStr.get());
}
}
void
nsIdleService::SetTimerExpiryIfBefore(TimeStamp aNextTimeout)
{
#if defined(PR_LOGGING) || defined(MOZ_WIDGET_ANDROID)
TimeDuration nextTimeoutDuration = aNextTimeout - TimeStamp::Now();
#endif
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: SetTimerExpiryIfBefore: next timeout %0.f msec from now",
nextTimeoutDuration.ToMilliseconds()));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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;
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: IdleService reset timer expiry to %0.f msec from now",
deltaTime.ToMilliseconds()));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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) && UINT32_MAX == mDeltaToNextIdleSwitchInS) {
// If not, just let any existing timers run to completion
// And bail out.
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: ReconfigureTimer: no idle or waiting observers"));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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);
#if defined(PR_LOGGING) || defined(MOZ_WIDGET_ANDROID)
TimeDuration nextTimeoutDuration = nextTimeoutAt - curTime;
#endif
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: next timeout %0.f msec from now",
nextTimeoutDuration.ToMilliseconds()));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"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) {
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: idle observers, reducing timeout to %u msec from now",
MIN_IDLE_POLL_INTERVAL_MSEC));
#ifdef MOZ_WIDGET_ANDROID
__android_log_print(ANDROID_LOG_INFO, "IdleService",
"idle observers, reducing timeout to %u msec from now",
MIN_IDLE_POLL_INTERVAL_MSEC);
#endif
nextTimeoutAt = pollTimeout;
}
}
SetTimerExpiryIfBefore(nextTimeoutAt);
}
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