/*
Returns the time to wait for the next timer, or null if no timers
are waiting.
*/
bool QTimerInfoList::timerWait(timeval &tm)
{
timeval currentTime = updateCurrentTime();
repairTimersIfNeeded();
// Find first waiting timer not already active
QTimerInfo *t = 0;
for (QTimerInfoList::const_iterator it = constBegin(); it != constEnd(); ++it) {
if (!(*it)->inTimerEvent) {
t = *it;
break;
}
}
if (!t)
return false;
if (currentTime < t->timeout) {
// time to wait
tm = t->timeout - currentTime;
} else {
// no time to wait
tm.tv_sec = 0;
tm.tv_usec = 0;
}
return true;
}
/*
Returns the time to wait for the next timer, or null if no timers
are waiting.
*/
bool QTimerInfoList::timerWait(timeval &tm)
{
timeval currentTime = updateCurrentTime();
repairTimersIfNeeded();
if (isEmpty())
return false;
QTimerInfo *t = first(); // first waiting timer
if (currentTime < t->timeout) {
// time to wait
tm = t->timeout - currentTime;
} else {
// no time to wait
tm.tv_sec = 0;
tm.tv_usec = 0;
}
return true;
}
/*
Activate pending timers, returning how many where activated.
*/
int QTimerInfoList::activateTimers()
{
if (qt_disable_lowpriority_timers || isEmpty())
return 0; // nothing to do
bool firstTime = true;
timeval currentTime;
int n_act = 0, maxCount = count();
QTimerInfo *saveFirstTimerInfo = firstTimerInfo;
QTimerInfo *saveCurrentTimerInfo = currentTimerInfo;
firstTimerInfo = currentTimerInfo = 0;
while (maxCount--) {
currentTime = updateCurrentTime();
if (firstTime) {
repairTimersIfNeeded();
firstTime = false;
}
if (isEmpty())
break;
currentTimerInfo = first();
if (currentTime < currentTimerInfo->timeout)
break; // no timer has expired
if (!firstTimerInfo) {
firstTimerInfo = currentTimerInfo;
} else if (firstTimerInfo == currentTimerInfo) {
// avoid sending the same timer multiple times
break;
} else if (currentTimerInfo->interval < firstTimerInfo->interval
|| currentTimerInfo->interval == firstTimerInfo->interval) {
firstTimerInfo = currentTimerInfo;
}
// remove from list
removeFirst();
// determine next timeout time
currentTimerInfo->timeout += currentTimerInfo->interval;
if (currentTimerInfo->timeout < currentTime)
currentTimerInfo->timeout = currentTime + currentTimerInfo->interval;
// reinsert timer
timerInsert(currentTimerInfo);
if (currentTimerInfo->interval.tv_usec > 0 || currentTimerInfo->interval.tv_sec > 0)
n_act++;
if (!currentTimerInfo->inTimerEvent) {
// send event, but don't allow it to recurse
currentTimerInfo->inTimerEvent = true;
QTimerEvent e(currentTimerInfo->id);
QCoreApplication::sendEvent(currentTimerInfo->obj, &e);
if (currentTimerInfo)
currentTimerInfo->inTimerEvent = false;
}
}
firstTimerInfo = saveFirstTimerInfo;
currentTimerInfo = saveCurrentTimerInfo;
return n_act;
}
