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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