xref: /openbmc/linux/sound/core/seq/oss/seq_oss_readq.h (revision 1a59d1b8)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * OSS compatible sequencer driver
4  * read fifo queue
5  *
6  * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
7  */
8 
9 #ifndef __SEQ_OSS_READQ_H
10 #define __SEQ_OSS_READQ_H
11 
12 #include "seq_oss_device.h"
13 
14 
15 /*
16  * definition of read queue
17  */
18 struct seq_oss_readq {
19 	union evrec *q;
20 	int qlen;
21 	int maxlen;
22 	int head, tail;
23 	unsigned long pre_event_timeout;
24 	unsigned long input_time;
25 	wait_queue_head_t midi_sleep;
26 	spinlock_t lock;
27 };
28 
29 struct seq_oss_readq *snd_seq_oss_readq_new(struct seq_oss_devinfo *dp, int maxlen);
30 void snd_seq_oss_readq_delete(struct seq_oss_readq *q);
31 void snd_seq_oss_readq_clear(struct seq_oss_readq *readq);
32 unsigned int snd_seq_oss_readq_poll(struct seq_oss_readq *readq, struct file *file, poll_table *wait);
33 int snd_seq_oss_readq_puts(struct seq_oss_readq *readq, int dev, unsigned char *data, int len);
34 int snd_seq_oss_readq_sysex(struct seq_oss_readq *q, int dev,
35 			    struct snd_seq_event *ev);
36 int snd_seq_oss_readq_put_event(struct seq_oss_readq *readq, union evrec *ev);
37 int snd_seq_oss_readq_put_timestamp(struct seq_oss_readq *readq, unsigned long curt, int seq_mode);
38 int snd_seq_oss_readq_pick(struct seq_oss_readq *q, union evrec *rec);
39 void snd_seq_oss_readq_wait(struct seq_oss_readq *q);
40 void snd_seq_oss_readq_free(struct seq_oss_readq *q);
41 
42 #define snd_seq_oss_readq_lock(q, flags) spin_lock_irqsave(&(q)->lock, flags)
43 #define snd_seq_oss_readq_unlock(q, flags) spin_unlock_irqrestore(&(q)->lock, flags)
44 
45 #endif
46