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1 | /* |
2 | * ALSA sequencer Priority Queue | |
3 | * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | #ifndef __SND_SEQ_PRIOQ_H | |
22 | #define __SND_SEQ_PRIOQ_H | |
23 | ||
24 | #include "seq_memory.h" | |
25 | ||
26 | ||
27 | /* === PRIOQ === */ | |
28 | ||
c7e0b5bf TI |
29 | struct snd_seq_prioq { |
30 | struct snd_seq_event_cell *head; /* pointer to head of prioq */ | |
31 | struct snd_seq_event_cell *tail; /* pointer to tail of prioq */ | |
1da177e4 LT |
32 | int cells; |
33 | spinlock_t lock; | |
c7e0b5bf | 34 | }; |
1da177e4 LT |
35 | |
36 | ||
37 | /* create new prioq (constructor) */ | |
c7e0b5bf | 38 | struct snd_seq_prioq *snd_seq_prioq_new(void); |
1da177e4 LT |
39 | |
40 | /* delete prioq (destructor) */ | |
c7e0b5bf | 41 | void snd_seq_prioq_delete(struct snd_seq_prioq **fifo); |
1da177e4 LT |
42 | |
43 | /* enqueue cell to prioq */ | |
c7e0b5bf | 44 | int snd_seq_prioq_cell_in(struct snd_seq_prioq *f, struct snd_seq_event_cell *cell); |
1da177e4 LT |
45 | |
46 | /* dequeue cell from prioq */ | |
d0f83306 TI |
47 | struct snd_seq_event_cell *snd_seq_prioq_cell_out(struct snd_seq_prioq *f, |
48 | void *current_time); | |
1da177e4 LT |
49 | |
50 | /* return number of events available in prioq */ | |
c7e0b5bf | 51 | int snd_seq_prioq_avail(struct snd_seq_prioq *f); |
1da177e4 | 52 | |
1da177e4 | 53 | /* client left queue */ |
c7e0b5bf | 54 | void snd_seq_prioq_leave(struct snd_seq_prioq *f, int client, int timestamp); |
1da177e4 LT |
55 | |
56 | /* Remove events */ | |
c7e0b5bf TI |
57 | void snd_seq_prioq_remove_events(struct snd_seq_prioq *f, int client, |
58 | struct snd_seq_remove_events *info); | |
1da177e4 LT |
59 | |
60 | #endif |