3  *   ALSA sequencer Timing queue handling
10  *     - Owner of unlocked queue is kept unmodified even if it is
19  *     - The queue is locked when struct snd_seq_queue pointer is returned via
49 /* assign queue id and insert to list */
58 			q->queue = i;  in queue_list_add()
87 /* create new queue (constructor) */
100 	q->queue = -1;  in queue_new()
120 /* delete queue (destructor) */
153 static void queue_use(struct snd_seq_queue *queue, int client, int use);
155 /* allocate a new queue -
156  * return pointer to new queue or ERR_PTR(-errno) for error
157  * The new queue's use_lock is set to 1. It is the caller's responsibility to
178 /* delete a queue - queue must be owned by the client */
194 /* return pointer to queue structure for specified id */
208 /* return the (first) queue matching with the specified name */
250 	/* Process tick queue... */  in snd_seq_check_queue()
261 	/* Process time queue... */  in snd_seq_check_queue()
285 /* enqueue a event to singe queue */
292 	dest = cell->event.queue;	/* destination queue */  in snd_seq_enqueue_event()
313 	/* enqueue event in the real-time or midi queue */  in snd_seq_enqueue_event()
342 /* check if the client has permission to modify queue parameters.
343  * if it does, lock the queue
356 /* unlock the queue */
377  * change queue's owner and permission
409 	struct snd_seq_queue *queue __free(snd_seq_queue) =  in snd_seq_queue_timer_open()
412 	if (queue == NULL)  in snd_seq_queue_timer_open()
414 	tmr = queue->timer;  in snd_seq_queue_timer_open()
415 	result = snd_seq_timer_open(queue);  in snd_seq_queue_timer_open()
418 		result = snd_seq_timer_open(queue);  in snd_seq_queue_timer_open()
429 	struct snd_seq_queue *queue __free(snd_seq_queue) =  in snd_seq_queue_timer_close()
432 	if (queue == NULL)  in snd_seq_queue_timer_close()
434 	snd_seq_timer_close(queue);  in snd_seq_queue_timer_close()
438 /* change queue tempo and ppq */
459 /* use or unuse this queue */
460 static void queue_use(struct snd_seq_queue *queue, int client, int use)  in queue_use()  argument
463 		if (!test_and_set_bit(client, queue->clients_bitmap))  in queue_use()
464 			queue->clients++;  in queue_use()
466 		if (test_and_clear_bit(client, queue->clients_bitmap))  in queue_use()
467 			queue->clients--;  in queue_use()
469 	if (queue->clients) {  in queue_use()
470 		if (use && queue->clients == 1)  in queue_use()
471 			snd_seq_timer_defaults(queue->timer);  in queue_use()
472 		snd_seq_timer_open(queue);  in queue_use()
474 		snd_seq_timer_close(queue);  in queue_use()
478 /* use or unuse this queue -
484 	struct snd_seq_queue *queue __free(snd_seq_queue) =  in snd_seq_queue_use()
487 	if (queue == NULL)  in snd_seq_queue_use()
489 	guard(mutex)(&queue->timer_mutex);  in snd_seq_queue_use()
490 	queue_use(queue, client, use);  in snd_seq_queue_use()
495  * check if queue is used by the client
496  * return negative value if the queue is invalid.
505 		return -EINVAL; /* invalid queue */  in snd_seq_queue_is_used()
513  * remove cells for no longer exist client (for non-owned queue)
514  * or delete this queue (for owned queue)
520 	/* delete own queues from queue list */  in snd_seq_queue_client_leave()
537 			snd_seq_queue_use(q->queue, client, 0);  in snd_seq_queue_client_leave()
557 		     q->queue == info->queue)) {  in snd_seq_queue_remove_cells()
578 	sev.queue = q->queue;  in queue_broadcast_event()
579 	sev.data.queue.queue = q->queue;  in queue_broadcast_event()
589  * process a received queue-control event.
615 		snd_seq_timer_set_tempo(q->timer, ev->data.queue.param.value);  in snd_seq_queue_process_event()
620 		if (snd_seq_timer_set_position_tick(q->timer, ev->data.queue.param.time.tick) == 0) {  in snd_seq_queue_process_event()
626 		if (snd_seq_timer_set_position_time(q->timer, ev->data.queue.param.time.time) == 0) {  in snd_seq_queue_process_event()
632 					   ev->data.queue.param.skew.value,  in snd_seq_queue_process_event()
633 					   ev->data.queue.param.skew.base) == 0) {  in snd_seq_queue_process_event()
642  * Queue control via timer control port:
651 		queueptr(ev->data.queue.queue);  in snd_seq_control_queue()
694 		snd_iprintf(buffer, "queue %d: [%s]\n", q->queue, q->name);  in snd_seq_info_queues_read()