63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
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/*
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* ALSA sequencer Priority Queue
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* Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
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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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