static int
insert_queue(struct seq_oss_devinfo *dp, union evrec *rec, struct file *opt)
{
int rc = 0;
struct snd_seq_event event;
/* if this is a timing event, process the current time */
if (snd_seq_oss_process_timer_event(dp->timer, rec))
return 0; /* no need to insert queue */
/* parse this event */
memset(&event, 0, sizeof(event));
/* set dummy -- to be sure */
event.type = SNDRV_SEQ_EVENT_NOTEOFF;
snd_seq_oss_fill_addr(dp, &event, dp->addr.port, dp->addr.client);
if (snd_seq_oss_process_event(dp, rec, &event))
return 0; /* invalid event - no need to insert queue */
event.time.tick = snd_seq_oss_timer_cur_tick(dp->timer);
if (dp->timer->realtime || !dp->timer->running) {
snd_seq_oss_dispatch(dp, &event, 0, 0);
} else {
if (is_nonblock_mode(dp->file_mode))
rc = snd_seq_kernel_client_enqueue(dp->cseq, &event, 0, 0);
else
rc = snd_seq_kernel_client_enqueue_blocking(dp->cseq, &event, opt, 0, 0);
}
return rc;
}
/*
* wait until the write buffer has enough room
*/
int
snd_seq_oss_writeq_sync(seq_oss_writeq_t *q)
{
seq_oss_devinfo_t *dp = q->dp;
abstime_t time;
unsigned long flags;
time = snd_seq_oss_timer_cur_tick(dp->timer);
if (q->sync_time >= time)
return 0; /* already finished */
if (! q->sync_event_put) {
snd_seq_event_t ev;
evrec_t *rec;
/* put echoback event */
memset(&ev, 0, sizeof(ev));
ev.flags = 0;
ev.type = SNDRV_SEQ_EVENT_ECHO;
ev.time.tick = time;
/* echo back to itself */
snd_seq_oss_fill_addr(dp, &ev, dp->addr.client, dp->addr.port);
rec = (evrec_t*)&ev.data;
rec->t.code = SEQ_SYNCTIMER;
rec->t.time = time;
q->sync_event_put = 1;
snd_seq_kernel_client_enqueue_blocking(dp->cseq, &ev, NULL, 0, 0);
}
spin_lock_irqsave(&q->sync_lock, flags);
if (! q->sync_event_put) { /* echoback event has been received */
spin_unlock_irqrestore(&q->sync_lock, flags);
return 0;
}
/* wait for echo event */
spin_unlock(&q->sync_lock);
interruptible_sleep_on_timeout(&q->sync_sleep, HZ);
spin_lock(&q->sync_lock);
if (signal_pending(current)) {
/* interrupted - return 0 to finish sync */
q->sync_event_put = 0;
spin_unlock_irqrestore(&q->sync_lock, flags);
return 0;
}
spin_unlock_irqrestore(&q->sync_lock, flags);
if (q->sync_time >= time)
return 0;
else
return 1;
}
/*
* wait until the write buffer has enough room
*/
int
snd_seq_oss_writeq_sync(struct seq_oss_writeq *q)
{
struct seq_oss_devinfo *dp = q->dp;
abstime_t time;
time = snd_seq_oss_timer_cur_tick(dp->timer);
if (q->sync_time >= time)
return 0; /* already finished */
if (! q->sync_event_put) {
struct snd_seq_event ev;
union evrec *rec;
/* put echoback event */
memset(&ev, 0, sizeof(ev));
ev.flags = 0;
ev.type = SNDRV_SEQ_EVENT_ECHO;
ev.time.tick = time;
/* echo back to itself */
snd_seq_oss_fill_addr(dp, &ev, dp->addr.client, dp->addr.port);
rec = (union evrec *)&ev.data;
rec->t.code = SEQ_SYNCTIMER;
rec->t.time = time;
q->sync_event_put = 1;
snd_seq_kernel_client_enqueue_blocking(dp->cseq, &ev, NULL, 0, 0);
}
wait_event_interruptible_timeout(q->sync_sleep, ! q->sync_event_put, HZ);
if (signal_pending(current))
/* interrupted - return 0 to finish sync */
q->sync_event_put = 0;
if (! q->sync_event_put || q->sync_time >= time)
return 0;
return 1;
}
