void snd_seq_check_queue(struct snd_seq_queue *q, int atomic, int hop)
{
unsigned long flags;
struct snd_seq_event_cell *cell;
if (q == NULL)
return;
/* make this function non-reentrant */
spin_lock_irqsave(&q->check_lock, flags);
if (q->check_blocked) {
q->check_again = 1;
spin_unlock_irqrestore(&q->check_lock, flags);
return; /* other thread is already checking queues */
}
q->check_blocked = 1;
spin_unlock_irqrestore(&q->check_lock, flags);
__again:
/* Process tick queue... */
while ((cell = snd_seq_prioq_cell_peek(q->tickq)) != NULL) {
if (snd_seq_compare_tick_time(&q->timer->tick.cur_tick,
&cell->event.time.tick)) {
cell = snd_seq_prioq_cell_out(q->tickq);
if (cell)
snd_seq_dispatch_event(cell, atomic, hop);
} else {
/* event remains in the queue */
break;
}
}
/* Process time queue... */
while ((cell = snd_seq_prioq_cell_peek(q->timeq)) != NULL) {
if (snd_seq_compare_real_time(&q->timer->cur_time,
&cell->event.time.time)) {
cell = snd_seq_prioq_cell_out(q->timeq);
if (cell)
snd_seq_dispatch_event(cell, atomic, hop);
} else {
/* event remains in the queue */
break;
}
}
/* free lock */
spin_lock_irqsave(&q->check_lock, flags);
if (q->check_again) {
q->check_again = 0;
spin_unlock_irqrestore(&q->check_lock, flags);
goto __again;
}
q->check_blocked = 0;
spin_unlock_irqrestore(&q->check_lock, flags);
}
/* delete prioq (destructor) */
void snd_seq_prioq_delete(struct snd_seq_prioq **fifo)
{
struct snd_seq_prioq *f = *fifo;
*fifo = NULL;
if (f == NULL) {
snd_printd("oops: snd_seq_prioq_delete() called with NULL prioq\n");
return;
}
/* release resources...*/
/*....................*/
if (f->cells > 0) {
/* drain prioQ */
while (f->cells > 0)
snd_seq_cell_free(snd_seq_prioq_cell_out(f));
}
kfree(f);
}
