linux/sound/core/seq/seq_queue.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *   ALSA sequencer Queue handling
 *   Copyright (c) 1998-1999 by Frank van de Pol <[email protected]>
 */
#ifndef __SND_SEQ_QUEUE_H
#define __SND_SEQ_QUEUE_H

#include "seq_memory.h"
#include "seq_prioq.h"
#include "seq_timer.h"
#include "seq_lock.h"
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/bitops.h>

#define SEQ_QUEUE_NO_OWNER …

struct snd_seq_queue { … };


/* get the number of current queues */
int snd_seq_queue_get_cur_queues(void);

/* delete queues */ 
void snd_seq_queues_delete(void);


/* create new queue (constructor) */
struct snd_seq_queue *snd_seq_queue_alloc(int client, int locked, unsigned int flags);

/* delete queue (destructor) */
int snd_seq_queue_delete(int client, int queueid);

/* final stage */
void snd_seq_queue_client_leave(int client);

/* enqueue a event received from one the clients */
int snd_seq_enqueue_event(struct snd_seq_event_cell *cell, int atomic, int hop);

/* Remove events */
void snd_seq_queue_client_leave_cells(int client);
void snd_seq_queue_remove_cells(int client, struct snd_seq_remove_events *info);

/* return pointer to queue structure for specified id */
struct snd_seq_queue *queueptr(int queueid);
/* unlock */
#define queuefree(q) …

/* return the (first) queue matching with the specified name */
struct snd_seq_queue *snd_seq_queue_find_name(char *name);

/* check single queue and dispatch events */
void snd_seq_check_queue(struct snd_seq_queue *q, int atomic, int hop);

/* access to queue's parameters */
int snd_seq_queue_check_access(int queueid, int client);
int snd_seq_queue_timer_set_tempo(int queueid, int client, struct snd_seq_queue_tempo *info);
int snd_seq_queue_set_owner(int queueid, int client, int locked);
int snd_seq_queue_timer_open(int queueid);
int snd_seq_queue_timer_close(int queueid);
int snd_seq_queue_use(int queueid, int client, int use);
int snd_seq_queue_is_used(int queueid, int client);

int snd_seq_control_queue(struct snd_seq_event *ev, int atomic, int hop);

#endif