sound/core/seq/oss/seq_oss_readq.h

   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