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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - sound/core/seq/seq_prioq.h
2 * ALSA sequencer Priority Queue
3 * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
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.
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.
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
21 #ifndef __SND_SEQ_PRIOQ_H
22 #define __SND_SEQ_PRIOQ_H
24 #include "seq_memory.h"
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 */
37 /* create new prioq (constructor) */
38 struct snd_seq_prioq
*snd_seq_prioq_new(void);
40 /* delete prioq (destructor) */
41 void snd_seq_prioq_delete(struct snd_seq_prioq
**fifo
);
43 /* enqueue cell to prioq */
44 int snd_seq_prioq_cell_in(struct snd_seq_prioq
*f
, struct snd_seq_event_cell
*cell
);
46 /* dequeue cell from prioq */
47 struct snd_seq_event_cell
*snd_seq_prioq_cell_out(struct snd_seq_prioq
*f
);
49 /* return number of events available in prioq */
50 int snd_seq_prioq_avail(struct snd_seq_prioq
*f
);
52 /* peek at cell at the head of the prioq */
53 struct snd_seq_event_cell
*snd_seq_prioq_cell_peek(struct snd_seq_prioq
*f
);
55 /* client left queue */
56 void snd_seq_prioq_leave(struct snd_seq_prioq
*f
, int client
, int timestamp
);
59 void snd_seq_prioq_remove_events(struct snd_seq_prioq
*f
, int client
,
60 struct snd_seq_remove_events
*info
);