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