linux/sound/core/seq/oss/seq_oss_writeq.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * OSS compatible sequencer driver
 *
 * seq_oss_writeq.c - write queue and sync
 *
 * Copyright (C) 1998,99 Takashi Iwai <[email protected]>
 */

#include "seq_oss_writeq.h"
#include "seq_oss_event.h"
#include "seq_oss_timer.h"
#include <sound/seq_oss_legacy.h>
#include "../seq_lock.h"
#include "../seq_clientmgr.h"
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/sched/signal.h>


/*
 * create a write queue record
 */
struct seq_oss_writeq *
snd_seq_oss_writeq_new(struct seq_oss_devinfo *dp, int maxlen)
{ … }

/*
 * delete the write queue
 */
void
snd_seq_oss_writeq_delete(struct seq_oss_writeq *q)
{ … }


/*
 * reset the write queue
 */
void
snd_seq_oss_writeq_clear(struct seq_oss_writeq *q)
{ … }

/*
 * wait until the write buffer has enough room
 */
int
snd_seq_oss_writeq_sync(struct seq_oss_writeq *q)
{ … }

/*
 * wake up sync - echo event was catched
 */
void
snd_seq_oss_writeq_wakeup(struct seq_oss_writeq *q, abstime_t time)
{ … }


/*
 * return the unused pool size
 */
int
snd_seq_oss_writeq_get_free_size(struct seq_oss_writeq *q)
{ … }


/*
 * set output threshold size from ioctl
 */
void
snd_seq_oss_writeq_set_output(struct seq_oss_writeq *q, int val)
{ … }