LXR linux/sound/core/seq/oss/seq_oss

   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 */
  18struct 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
  29struct seq_oss_readq *snd_seq_oss_readq_new(struct seq_oss_devinfo *dp, int maxlen);
  30void snd_seq_oss_readq_delete(struct seq_oss_readq *q);
  31void snd_seq_oss_readq_clear(struct seq_oss_readq *readq);
  32unsigned int snd_seq_oss_readq_poll(struct seq_oss_readq *readq, struct file *file, poll_table *wait);
  33int snd_seq_oss_readq_puts(struct seq_oss_readq *readq, int dev, unsigned char *data, int len);
  34int snd_seq_oss_readq_sysex(struct seq_oss_readq *q, int dev,
  35                            struct snd_seq_event *ev);
  36int snd_seq_oss_readq_put_event(struct seq_oss_readq *readq, union evrec *ev);
  37int snd_seq_oss_readq_put_timestamp(struct seq_oss_readq *readq, unsigned long curt, int seq_mode);
  38int snd_seq_oss_readq_pick(struct seq_oss_readq *q, union evrec *rec);
  39void snd_seq_oss_readq_wait(struct seq_oss_readq *q);
  40void 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