mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/widget/xpwidgets/nsIdleService.cpp

694 строки
23 KiB
C++
Исходник Ответственный История

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=2:tabstop=2:
*/
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Gijs Kruitbosch <gijskruitbosch@gmail.com>.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Gijs Kruitbosch <gijskruitbosch@gmail.com>
* Edward Lee <edward.lee@engineering.uiuc.edu>
* Mike Kristoffersen <mozstuff@mikek.dk>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsIdleService.h"
#include "nsString.h"
#include "nsIObserverService.h"
#include "nsIServiceManager.h"
#include "nsDebug.h"
#include "nsCOMArray.h"
#include "prinrval.h"
#include "prlog.h"
#include "mozilla/Services.h"
#include "mozilla/Preferences.h"
#include "mozilla/Telemetry.h"
using namespace mozilla;
// observer topics used:
#define OBSERVER_TOPIC_IDLE "idle"
#define OBSERVER_TOPIC_BACK "back"
#define OBSERVER_TOPIC_IDLE_DAILY "idle-daily"
// interval in milliseconds between internal idle time requests.
#define MIN_IDLE_POLL_INTERVAL_MSEC (5 * PR_MSEC_PER_SEC) /* 5 sec */
// Time used by the daily idle serivce to determine a significant idle time.
#define DAILY_SIGNIFICANT_IDLE_SERVICE_SEC 300 /* 5 min */
// 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 = NULL;
#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 *)
{
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_BACK) == 0) {
return NS_OK;
}
MOZ_ASSERT(strcmp(aTopic, OBSERVER_TOPIC_IDLE) == 0);
// Notify anyone who cares.
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
NS_ENSURE_STATE(observerService);
(void)observerService->NotifyObservers(nsnull,
OBSERVER_TOPIC_IDLE_DAILY,
nsnull);
// Notify the category observers.
const nsCOMArray<nsIObserver> &entries = mCategoryObservers.GetEntries();
for (PRInt32 i = 0; i < entries.Count(); ++i) {
(void)entries[i]->Observe(nsnull, OBSERVER_TOPIC_IDLE_DAILY, nsnull);
}
// Stop observing idle for today.
(void)mIdleService->RemoveIdleObserver(this,
DAILY_SIGNIFICANT_IDLE_SERVICE_SEC);
// Set the last idle-daily time pref.
PRInt32 nowSec = static_cast<PRInt32>(PR_Now() / PR_USEC_PER_SEC);
Preferences::SetInt(PREF_LAST_DAILY, nowSec);
// 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)
{
}
void
nsIdleServiceDaily::Init()
{
// Check time of the last idle-daily notification. If it was more than 24
// hours ago listen for idle, otherwise set a timer for 24 hours from now.
PRInt32 nowSec = static_cast<PRInt32>(PR_Now() / PR_USEC_PER_SEC);
PRInt32 lastDaily = Preferences::GetInt(PREF_LAST_DAILY, 0);
if (lastDaily < 0 || lastDaily > nowSec) {
// The time is bogus, use default.
lastDaily = 0;
}
// Check if it has been a day since the last notification.
if (nowSec - lastDaily > SECONDS_PER_DAY) {
// Wait for the user to become idle, so we can do todays idle tasks.
DailyCallback(nsnull, this);
}
else {
// 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);
}
// Register for when we should terminate/pause
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
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 = nsnull;
}
}
// static
void
nsIdleServiceDaily::DailyCallback(nsITimer* aTimer, void* aClosure)
{
nsIdleServiceDaily* me = static_cast<nsIdleServiceDaily*>(aClosure);
// The one thing we do every day is to start waiting for the user to "have
// a significant idle time".
(void)me->mIdleService->AddIdleObserver(me,
DAILY_SIGNIFICANT_IDLE_SERVICE_SEC);
}
/**
* 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
nsIdleService::nsIdleService() : mCurrentlySetToTimeoutAtInPR(0),
mAnyObserverIdle(false),
mDeltaToNextIdleSwitchInS(PR_UINT32_MAX),
mLastUserInteractionInPR(PR_Now())
{
#ifdef PR_LOGGING
if (sLog == NULL)
sLog = PR_NewLogModule("idleService");
#endif
mDailyIdle = new nsIdleServiceDaily(this);
mDailyIdle->Init();
}
nsIdleService::~nsIdleService()
{
if(mTimer) {
mTimer->Cancel();
}
}
NS_IMETHODIMP
nsIdleService::AddIdleObserver(nsIObserver* aObserver, PRUint32 aIdleTimeInS)
{
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Register idle observer %x for %d seconds",
aObserver, 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, (PR_UINT32_MAX / 10) - 1);
// 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));
mDeltaToNextIdleSwitchInS = aIdleTimeInS;
}
// Ensure timer is running.
ReconfigureTimer();
return NS_OK;
}
NS_IMETHODIMP
nsIdleService::RemoveIdleObserver(nsIObserver* aObserver, PRUint32 aTimeInS)
{
NS_ENSURE_ARG_POINTER(aObserver);
NS_ENSURE_ARG(aTimeInS);
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;
if (mArrayListeners.RemoveElement(listener, c)) {
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Remove idle observer %x (%d seconds)",
aObserver, aTimeInS));
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));
return NS_ERROR_FAILURE;
}
void
nsIdleService::ResetIdleTimeOut(PRUint32 idleDeltaInMS)
{
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Reset idle timeout (last interaction %u msec)",
idleDeltaInMS));
// Store the time
mLastUserInteractionInPR = PR_Now() - (idleDeltaInMS * PR_USEC_PER_MSEC);
// If no one is idle, then we are done, any existing timers can keep running.
if (!mAnyObserverIdle) {
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Reset idle timeout: no idle observers"));
return;
}
// 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 = PR_UINT32_MAX;
// Loop through all listeners, and find any that have detected idle.
for (PRUint32 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 = PR_MIN(mDeltaToNextIdleSwitchInS,
curListener.reqIdleTime);
}
// When we are done, then we wont have anyone idle.
mAnyObserverIdle = false;
// Restart the idle timer, and do so before anyone can delay us.
ReconfigureTimer();
PRInt32 numberOfPendingNotifications = notifyList.Count();
Telemetry::Accumulate(Telemetry::IDLE_NOTIFY_BACK_LISTENERS,
numberOfPendingNotifications);
// Bail if nothing to do.
if (!numberOfPendingNotifications) {
return;
}
// 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((PRInt32)(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]));
notifyList[numberOfPendingNotifications]->Observe(this,
OBSERVER_TOPIC_BACK,
timeStr.get());
}
}
NS_IMETHODIMP
nsIdleService::GetIdleTime(PRUint32* idleTime)
{
// Check sanity of in parameter.
if (!idleTime) {
return NS_ERROR_NULL_POINTER;
}
// Polled idle time in ms.
PRUint32 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.
PRUint32 timeSinceResetInMS = (PR_Now() - mLastUserInteractionInPR) /
PR_USEC_PER_MSEC;
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Get idle time: time since reset %u msec",
timeSinceResetInMS));
// 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 = NS_MIN(timeSinceResetInMS, polledIdleTimeMS);
return NS_OK;
}
bool
nsIdleService::PollIdleTime(PRUint32* /*aIdleTime*/)
{
// Default behavior is not to have the ability to poll an idle time.
return false;
}
bool
nsIdleService::UsePollMode()
{
PRUint32 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.
mCurrentlySetToTimeoutAtInPR = 0;
// Get the current idle time.
PRUint32 currentIdleTimeInMS;
if (NS_FAILED(GetIdleTime(&currentIdleTimeInMS))) {
PR_LOG(sLog, PR_LOG_ALWAYS,
("idleService: Idle timer callback: failed to get idle time"));
return;
}
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: Idle timer callback: current idle time %u msec",
currentIdleTimeInMS));
// 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, it is also very important that we call PR_Now AFTER
// the call to GetIdleTime().
if (((PR_Now() - mLastUserInteractionInPR) / PR_USEC_PER_MSEC) >
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.
PRUint32 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 = PR_UINT32_MAX;
// Create list of observers that should be notified.
nsCOMArray<nsIObserver> notifyList;
for (PRUint32 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;
} else {
// Listeners that are not timed out yet are candidates for timing out.
mDeltaToNextIdleSwitchInS = PR_MIN(mDeltaToNextIdleSwitchInS,
curListener.reqIdleTime);
}
}
}
// Restart the timer before any notifications that could slow us down are
// done.
ReconfigureTimer();
PRInt32 numberOfPendingNotifications = notifyList.Count();
Telemetry::Accumulate(Telemetry::IDLE_NOTIFY_IDLE_LISTENERS,
numberOfPendingNotifications);
// Bail if nothing to do.
if (!numberOfPendingNotifications) {
return;
}
// Remember we have someone idle.
mAnyObserverIdle = true;
// 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]));
notifyList[numberOfPendingNotifications]->Observe(this,
OBSERVER_TOPIC_IDLE,
timeStr.get());
}
}
void
nsIdleService::SetTimerExpiryIfBefore(PRTime aNextTimeoutInPR)
{
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: SetTimerExpiryIfBefore: next timeout %lld usec",
aNextTimeoutInPR));
// 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 (mCurrentlySetToTimeoutAtInPR > aNextTimeoutInPR ||
!mCurrentlySetToTimeoutAtInPR) {
#ifdef PR_LOGGING
PRTime oldTimeout = mCurrentlySetToTimeoutAtInPR;
#endif
mCurrentlySetToTimeoutAtInPR = aNextTimeoutInPR ;
// 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.
PRTime currentTimeInPR = PR_Now();
if (currentTimeInPR > mCurrentlySetToTimeoutAtInPR) {
mCurrentlySetToTimeoutAtInPR = currentTimeInPR;
}
// Add 10 ms to ensure we don't undershoot, and never get a "0" timer.
mCurrentlySetToTimeoutAtInPR += 10 * PR_USEC_PER_MSEC;
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: reset timer expiry from %lld usec to %lld usec",
oldTimeout, mCurrentlySetToTimeoutAtInPR));
// Start the timer
mTimer->InitWithFuncCallback(StaticIdleTimerCallback,
this,
(mCurrentlySetToTimeoutAtInPR -
currentTimeInPR) / PR_USEC_PER_MSEC,
nsITimer::TYPE_ONE_SHOT);
}
}
void
nsIdleService::ReconfigureTimer(void)
{
// Check if either someone is idle, or someone will become idle.
if (!mAnyObserverIdle && PR_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"));
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.
PRTime curTimeInPR = PR_Now();
PRTime nextTimeoutAtInPR = mLastUserInteractionInPR +
(((PRTime)mDeltaToNextIdleSwitchInS) *
PR_USEC_PER_SEC);
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: next timeout %lld usec (%u msec from now)",
nextTimeoutAtInPR,
(PRUint32)((nextTimeoutAtInPR - curTimeInPR) / PR_USEC_PER_MSEC)));
// Check if we should correct the timeout time because we should poll before.
if (mAnyObserverIdle && UsePollMode()) {
PRTime pollTimeout = curTimeInPR +
MIN_IDLE_POLL_INTERVAL_MSEC * PR_USEC_PER_MSEC;
if (nextTimeoutAtInPR > pollTimeout) {
PR_LOG(sLog, PR_LOG_DEBUG,
("idleService: idle observers, reducing timeout to %u msec from now",
MIN_IDLE_POLL_INTERVAL_MSEC));
nextTimeoutAtInPR = pollTimeout;
}
}
SetTimerExpiryIfBefore(nextTimeoutAtInPR);
}
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку