sound/core/seq/oss/seq_oss_readq.h

   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  */
  31 struct seq_oss_readq_t {
  32         evrec_t *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
  42 seq_oss_readq_t *snd_seq_oss_readq_new(seq_oss_devinfo_t *dp, int maxlen);
  43 void snd_seq_oss_readq_delete(seq_oss_readq_t *q);
  44 void snd_seq_oss_readq_clear(seq_oss_readq_t *readq);
  45 unsigned int snd_seq_oss_readq_poll(seq_oss_readq_t *readq, struct file *file, poll_table *wait);
  46 int snd_seq_oss_readq_puts(seq_oss_readq_t *readq, int dev, unsigned char *data, int len);
  47 int snd_seq_oss_readq_put_event(seq_oss_readq_t *readq, evrec_t *ev);
  48 int snd_seq_oss_readq_put_timestamp(seq_oss_readq_t *readq, unsigned long curt, int seq_mode);
  49 int snd_seq_oss_readq_pick(seq_oss_readq_t *q, evrec_t *rec);
  50 void snd_seq_oss_readq_wait(seq_oss_readq_t *q);
  51 void snd_seq_oss_readq_free(seq_oss_readq_t *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