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Added a deadlock case for the queue

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Original commit message from CVS:
Added a deadlock case for the queue
This commit is contained in:
Wim Taymans 2001-01-07 02:30:50 +00:00
parent 4e1993625f
commit 2763642766
1 changed files with 38 additions and 0 deletions
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38
docs/random/queue Normal file
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thread 1 thread2
// the queue is empty
while (!queue->level_buffers) {
STATUS("queue: %s U released lock\n");
GST_UNLOCK (queue);
// thread1 is scheduled and puts a lot of buffers
// in the queue
// thread1 has put the last buffer on the queue
// here. A signal is going to be emited
tosignal = (queue->level_buffers >= 0);
queue->level_buffers++;
/* we can unlock now */
GST_UNLOCK (queue);
if (tosignal) {
g_mutex_lock (queue->emptylock);
g_cond_signal (queue->emptycond);
g_mutex_unlock (queue->emptylock);
}
g_mutex_lock (queue->emptylock);
// wait forever
g_cond_wait (queue->emptycond, queue->emptylock);
g_mutex_unlock (queue->emptylock);
GST_LOCK (queue);
}
// thread 1 will also wait forever because the
// queue is filled....