PRBool
nsSocketTransportService::ServiceEventQ()
{
PRBool keepGoing;
// grab the event queue
PRCList eq;
PR_INIT_CLIST(&eq);
{
nsAutoLock lock(mEventQLock);
MoveCList(mEventQ, eq);
// check to see if we're supposed to shutdown
keepGoing = mInitialized;
}
// service the event queue
PLEvent *event;
while (!PR_CLIST_IS_EMPTY(&eq)) {
event = PLEVENT_FROM_LINK(PR_LIST_HEAD(&eq));
PR_REMOVE_AND_INIT_LINK(&event->link);
PL_HandleEvent(event);
}
return keepGoing;
}
void
nsIOThreadPool::ThreadFunc(void *arg)
{
nsIOThreadPool *pool = (nsIOThreadPool *) arg;
LOG(("entering ThreadFunc\n"));
{
nsAutoLock lock(pool->mLock);
for (;;) {
PRIntervalTime start = PR_IntervalNow(), timeout = IDLE_TIMEOUT;
//
// wait for one or more of the following to occur:
// (1) the event queue has an event to process
// (2) the shutdown flag has been set
// (3) the thread has been idle for too long
//
// PR_WaitCondVar will return when any of these conditions is true.
//
while (PR_CLIST_IS_EMPTY(&pool->mEventQ) && !pool->mShutdown) {
pool->mNumIdleThreads++;
PR_WaitCondVar(pool->mIdleThreadCV, timeout);
pool->mNumIdleThreads--;
PRIntervalTime delta = PR_IntervalNow() - start;
if (delta >= timeout)
break;
timeout -= delta;
start += delta;
}
// if the queue is still empty, then kill this thread (either we
// are shutting down or the thread exceeded the idle timeout)...
if (PR_CLIST_IS_EMPTY(&pool->mEventQ))
break;
// handle one event at a time: we don't want this one thread to hog
// all the events while other threads may be able to help out ;-)
do {
PLEvent *event = PLEVENT_FROM_LINK(PR_LIST_HEAD(&pool->mEventQ));
PR_REMOVE_AND_INIT_LINK(&event->link);
LOG(("event:%p\n", event));
// release lock!
lock.unlock();
PL_HandleEvent(event);
lock.lock();
}
while (!PR_CLIST_IS_EMPTY(&pool->mEventQ));
}
// thread is going away...
pool->mNumThreads--;
PR_NotifyCondVar(pool->mExitThreadCV);
}
// release our reference to the pool
NS_RELEASE(pool);
LOG(("leaving ThreadFunc\n"));
}
