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; }
int snd_seq_oss_ioctl(struct seq_oss_devinfo *dp, unsigned int cmd, unsigned long carg) { int dev, val; void __user *arg = (void __user *)carg; int __user *p = arg; switch (cmd) { case SNDCTL_TMR_TIMEBASE: case SNDCTL_TMR_TEMPO: case SNDCTL_TMR_START: case SNDCTL_TMR_STOP: case SNDCTL_TMR_CONTINUE: case SNDCTL_TMR_METRONOME: case SNDCTL_TMR_SOURCE: case SNDCTL_TMR_SELECT: case SNDCTL_SEQ_CTRLRATE: return snd_seq_oss_timer_ioctl(dp->timer, cmd, arg); case SNDCTL_SEQ_PANIC: debug_printk(("panic\n")); snd_seq_oss_reset(dp); return -EINVAL; case SNDCTL_SEQ_SYNC: debug_printk(("sync\n")); if (! is_write_mode(dp->file_mode) || dp->writeq == NULL) return 0; while (snd_seq_oss_writeq_sync(dp->writeq)) ; if (signal_pending(current)) return -ERESTARTSYS; return 0; case SNDCTL_SEQ_RESET: debug_printk(("reset\n")); snd_seq_oss_reset(dp); return 0; case SNDCTL_SEQ_TESTMIDI: debug_printk(("test midi\n")); if (get_user(dev, p)) return -EFAULT; return snd_seq_oss_midi_open(dp, dev, dp->file_mode); case SNDCTL_SEQ_GETINCOUNT: debug_printk(("get in count\n")); if (dp->readq == NULL || ! is_read_mode(dp->file_mode)) return 0; return put_user(dp->readq->qlen, p) ? -EFAULT : 0; case SNDCTL_SEQ_GETOUTCOUNT: debug_printk(("get out count\n")); if (! is_write_mode(dp->file_mode) || dp->writeq == NULL) return 0; return put_user(snd_seq_oss_writeq_get_free_size(dp->writeq), p) ? -EFAULT : 0; case SNDCTL_SEQ_GETTIME: debug_printk(("get time\n")); return put_user(snd_seq_oss_timer_cur_tick(dp->timer), p) ? -EFAULT : 0; case SNDCTL_SEQ_RESETSAMPLES: debug_printk(("reset samples\n")); if (get_user(dev, p)) return -EFAULT; return snd_seq_oss_synth_ioctl(dp, dev, cmd, carg); case SNDCTL_SEQ_NRSYNTHS: debug_printk(("nr synths\n")); return put_user(dp->max_synthdev, p) ? -EFAULT : 0; case SNDCTL_SEQ_NRMIDIS: debug_printk(("nr midis\n")); return put_user(dp->max_mididev, p) ? -EFAULT : 0; case SNDCTL_SYNTH_MEMAVL: debug_printk(("mem avail\n")); if (get_user(dev, p)) return -EFAULT; val = snd_seq_oss_synth_ioctl(dp, dev, cmd, carg); return put_user(val, p) ? -EFAULT : 0; case SNDCTL_FM_4OP_ENABLE: debug_printk(("4op\n")); if (get_user(dev, p)) return -EFAULT; snd_seq_oss_synth_ioctl(dp, dev, cmd, carg); return 0; case SNDCTL_SYNTH_INFO: case SNDCTL_SYNTH_ID: debug_printk(("synth info\n")); return snd_seq_oss_synth_info_user(dp, arg); case SNDCTL_SEQ_OUTOFBAND: debug_printk(("out of band\n")); return snd_seq_oss_oob_user(dp, arg); case SNDCTL_MIDI_INFO: debug_printk(("midi info\n")); return snd_seq_oss_midi_info_user(dp, arg); case SNDCTL_SEQ_THRESHOLD: debug_printk(("threshold\n")); if (! is_write_mode(dp->file_mode)) return 0; if (get_user(val, p)) return -EFAULT; if (val < 1) val = 1; if (val >= dp->writeq->maxlen) val = dp->writeq->maxlen - 1; snd_seq_oss_writeq_set_output(dp->writeq, val); return 0; case SNDCTL_MIDI_PRETIME: debug_printk(("pretime\n")); if (dp->readq == NULL || !is_read_mode(dp->file_mode)) return 0; if (get_user(val, p)) return -EFAULT; if (val <= 0) val = -1; else val = (HZ * val) / 10; dp->readq->pre_event_timeout = val; return put_user(val, p) ? -EFAULT : 0; default: debug_printk(("others\n")); if (! is_write_mode(dp->file_mode)) return -EIO; return snd_seq_oss_synth_ioctl(dp, 0, cmd, carg); } return 0; }