pqueue_pop
for(item = pqueue_pop(s->d1->sent_messages); item != NULL;
item = pqueue_pop(s->d1->sent_messages)) {
pqueue_pop(s->d1->buffered_messages);
while ((item = pqueue_pop(queue)) != NULL) {
while ((item = pqueue_pop(queue)) != NULL) {
while ((item = pqueue_pop(queue)) != NULL) {
item = pqueue_pop(queue->q);
item = pqueue_pop(queue->q);
pitem *pqueue_pop(pqueue pq);
for (item = pqueue_pop(pq); item != NULL; item = pqueue_pop(pq))