1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * ALSA sequencer Priority Queue
4 * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
5 */
6 #ifndef __SND_SEQ_PRIOQ_H
7 #define __SND_SEQ_PRIOQ_H
8
9 #include "seq_memory.h"
10
11
12 /* === PRIOQ === */
13
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 */
17 int cells;
18 spinlock_t lock;
19 };
20
21
22 /* create new prioq (constructor) */
23 struct snd_seq_prioq *snd_seq_prioq_new(void);
24
25 /* delete prioq (destructor) */
26 void snd_seq_prioq_delete(struct snd_seq_prioq **fifo);
27
28 /* enqueue cell to prioq */
29 int snd_seq_prioq_cell_in(struct snd_seq_prioq *f, struct snd_seq_event_cell *cell);
30
31 /* dequeue cell from prioq */
32 struct snd_seq_event_cell *snd_seq_prioq_cell_out(struct snd_seq_prioq *f,
33 void *current_time);
34
35 /* return number of events available in prioq */
36 int snd_seq_prioq_avail(struct snd_seq_prioq *f);
37
38 /* client left queue */
39 void snd_seq_prioq_leave(struct snd_seq_prioq *f, int client, int timestamp);
40
41 /* Remove events */
42 void snd_seq_prioq_remove_events(struct snd_seq_prioq *f, int client,
43 struct snd_seq_remove_events *info);
44
45 #endif
46
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