/*!
\internal
Makes all threads exit, waits for each tread to exit and deletes it.
*/
void QThreadPoolPrivate::reset()
{
QMutexLocker locker(&mutex);
isExiting = true;
runnableReady.wakeAll();
while (!allThreads.empty()) {
// move the contents of the set out so that we can iterate without the lock
QSet<QThreadPoolThread *> allThreadsCopy;
allThreadsCopy.swap(allThreads);
locker.unlock();
foreach (QThreadPoolThread *thread, allThreadsCopy) {
thread->wait();
delete thread;
}
locker.relock();
// repeat until all newly arrived threads have also completed
}
