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* ALSA sequencer Priority Queue
* Copyright (c) 1998 by Frank van de Pol <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef __SND_SEQ_PRIOQ_H
#define __SND_SEQ_PRIOQ_H
#include "seq_memory.h"
/* === PRIOQ === */
typedef struct {
snd_seq_event_cell_t* head; /* pointer to head of prioq */
snd_seq_event_cell_t* tail; /* pointer to tail of prioq */
int cells;
spinlock_t lock;
} prioq_t;
/* create new prioq (constructor) */
extern prioq_t *snd_seq_prioq_new(void);
/* delete prioq (destructor) */
extern void snd_seq_prioq_delete(prioq_t **fifo);
/* enqueue cell to prioq */
extern int snd_seq_prioq_cell_in(prioq_t *f, snd_seq_event_cell_t *cell);
/* dequeue cell from prioq */
extern snd_seq_event_cell_t *snd_seq_prioq_cell_out(prioq_t *f);
/* return number of events available in prioq */
extern int snd_seq_prioq_avail(prioq_t *f);
/* peek at cell at the head of the prioq */
extern snd_seq_event_cell_t *snd_seq_prioq_cell_peek(prioq_t *f);
/* client left queue */
extern void snd_seq_prioq_leave(prioq_t *f, int client, int timestamp);
/* Remove events */
void snd_seq_prioq_remove_events(prioq_t * f, int client,
snd_seq_remove_events_t *info);