LXR linux/sound/core/seq/oss/seq_oss

   1/*
   2 * OSS compatible sequencer driver
   3 * read fifo queue
   4 *
   5 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20 */
  21
  22#ifndef __SEQ_OSS_READQ_H
  23#define __SEQ_OSS_READQ_H
  24
  25#include "seq_oss_device.h"
  26
  27
  28/*
  29 * definition of read queue
  30 */
  31struct seq_oss_readq {
  32        union evrec *q;
  33        int qlen;
  34        int maxlen;
  35        int head, tail;
  36        unsigned long pre_event_timeout;
  37        unsigned long input_time;
  38        wait_queue_head_t midi_sleep;
  39        spinlock_t lock;
  40};
  41
  42struct seq_oss_readq *snd_seq_oss_readq_new(struct seq_oss_devinfo *dp, int maxlen);
  43void snd_seq_oss_readq_delete(struct seq_oss_readq *q);
  44void snd_seq_oss_readq_clear(struct seq_oss_readq *readq);
  45unsigned int snd_seq_oss_readq_poll(struct seq_oss_readq *readq, struct file *file, poll_table *wait);
  46int snd_seq_oss_readq_puts(struct seq_oss_readq *readq, int dev, unsigned char *data, int len);
  47int snd_seq_oss_readq_put_event(struct seq_oss_readq *readq, union evrec *ev);
  48int snd_seq_oss_readq_put_timestamp(struct seq_oss_readq *readq, unsigned long curt, int seq_mode);
  49int snd_seq_oss_readq_pick(struct seq_oss_readq *q, union evrec *rec);
  50void snd_seq_oss_readq_wait(struct seq_oss_readq *q);
  51void snd_seq_oss_readq_free(struct seq_oss_readq *q);
  52
  53#define snd_seq_oss_readq_lock(q, flags) spin_lock_irqsave(&(q)->lock, flags)
  54#define snd_seq_oss_readq_unlock(q, flags) spin_unlock_irqrestore(&(q)->lock, flags)
  55
  56#endif
  57