[linux-2.6-block.git] / sound / core / seq / seq_prioq.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *   ALSA sequencer Priority Queue
 *   Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
 */
#ifndef __SND_SEQ_PRIOQ_H
#define __SND_SEQ_PRIOQ_H

#include "seq_memory.h"


/* === PRIOQ === */

struct snd_seq_prioq {
	struct snd_seq_event_cell *head;      /* pointer to head of prioq */
	struct snd_seq_event_cell *tail;      /* pointer to tail of prioq */
	int cells;
	spinlock_t lock;
};


/* create new prioq (constructor) */
struct snd_seq_prioq *snd_seq_prioq_new(void);

/* delete prioq (destructor) */
void snd_seq_prioq_delete(struct snd_seq_prioq **fifo);

/* enqueue cell to prioq */
int snd_seq_prioq_cell_in(struct snd_seq_prioq *f, struct snd_seq_event_cell *cell);

/* dequeue cell from prioq */ 
struct snd_seq_event_cell *snd_seq_prioq_cell_out(struct snd_seq_prioq *f,
						  void *current_time);

/* return number of events available in prioq */
int snd_seq_prioq_avail(struct snd_seq_prioq *f);

/* client left queue */
void snd_seq_prioq_leave(struct snd_seq_prioq *f, int client, int timestamp);        

/* Remove events */
void snd_seq_prioq_remove_events(struct snd_seq_prioq *f, int client,
				 struct snd_seq_remove_events *info);

#endif
Commit	Line	Data
1a59d1b8	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
1da177e4 LT	2	/*
	3	* ALSA sequencer Priority Queue
	4	* Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
1da177e4 LT	5	*/
	6	#ifndef __SND_SEQ_PRIOQ_H
	7	#define __SND_SEQ_PRIOQ_H
	8
	9	#include "seq_memory.h"
	10
	11
	12	/* === PRIOQ === */
	13
c7e0b5bf TI	14	struct snd_seq_prioq {
	15	struct snd_seq_event_cell head; / pointer to head of prioq */
	16	struct snd_seq_event_cell tail; / pointer to tail of prioq */
1da177e4 LT	17	int cells;
1da177e4 LT	18	spinlock_t lock;
c7e0b5bf	19	};
1da177e4 LT	20
	21
	22	/* create new prioq (constructor) */
c7e0b5bf	23	struct snd_seq_prioq *snd_seq_prioq_new(void);
1da177e4 LT	24
1da177e4 LT	25	/* delete prioq (destructor) */
c7e0b5bf	26	void snd_seq_prioq_delete(struct snd_seq_prioq **fifo);
1da177e4 LT	27
1da177e4 LT	28	/* enqueue cell to prioq */
c7e0b5bf	29	int snd_seq_prioq_cell_in(struct snd_seq_prioq f, struct snd_seq_event_cell cell);
1da177e4 LT	30
1da177e4 LT	31	/* dequeue cell from prioq */
d0f83306 TI	32	struct snd_seq_event_cell snd_seq_prioq_cell_out(struct snd_seq_prioq f,
d0f83306 TI	33	void *current_time);
1da177e4 LT	34
1da177e4 LT	35	/* return number of events available in prioq */
c7e0b5bf	36	int snd_seq_prioq_avail(struct snd_seq_prioq *f);
1da177e4	37
1da177e4	38	/* client left queue */
c7e0b5bf	39	void snd_seq_prioq_leave(struct snd_seq_prioq *f, int client, int timestamp);
1da177e4 LT	40
1da177e4 LT	41	/* Remove events */
c7e0b5bf TI	42	void snd_seq_prioq_remove_events(struct snd_seq_prioq *f, int client,
c7e0b5bf TI	43	struct snd_seq_remove_events *info);
1da177e4 LT	44
1da177e4 LT	45	#endif