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TOMOYO Linux Cross Reference
Linux/sound/core/seq/oss/seq_oss_readq.h

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

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