release/src-rt-6.x.4708/linux/linux-2.6.36/sound/core/seq/oss/seq_oss_writeq.h

   1 /*
   2  * OSS compatible sequencer driver
   3  * write priority 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_WRITEQ_H
  23 #define __SEQ_OSS_WRITEQ_H
  24
  25 #include "seq_oss_device.h"
  26
  27
  28 struct seq_oss_writeq {
  29         struct seq_oss_devinfo *dp;
  30         int maxlen;
  31         abstime_t sync_time;
  32         int sync_event_put;
  33         wait_queue_head_t sync_sleep;
  34         spinlock_t sync_lock;
  35 };
  36
  37
  38 /*
  39  * seq_oss_writeq.c
  40  */
  41 struct seq_oss_writeq *snd_seq_oss_writeq_new(struct seq_oss_devinfo *dp, int maxlen);
  42 void snd_seq_oss_writeq_delete(struct seq_oss_writeq *q);
  43 void snd_seq_oss_writeq_clear(struct seq_oss_writeq *q);
  44 int snd_seq_oss_writeq_sync(struct seq_oss_writeq *q);
  45 void snd_seq_oss_writeq_wakeup(struct seq_oss_writeq *q, abstime_t time);
  46 int snd_seq_oss_writeq_get_free_size(struct seq_oss_writeq *q);
  47 void snd_seq_oss_writeq_set_output(struct seq_oss_writeq *q, int size);
  48
  49
  50 #endif