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 | |