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_sysex(struct seq_oss_readq *q, int dev, 48 struct snd_seq_event *ev); 49 int snd_seq_oss_readq_put_event(struct seq_oss_readq *readq, union evrec *ev); 50 int snd_seq_oss_readq_put_timestamp(struct seq_oss_readq *readq, unsigned long curt, int seq_mode); 51 int snd_seq_oss_readq_pick(struct seq_oss_readq *q, union evrec *rec); 52 void snd_seq_oss_readq_wait(struct seq_oss_readq *q); 53 void snd_seq_oss_readq_free(struct seq_oss_readq *q); 54 55 #define snd_seq_oss_readq_lock(q, flags) spin_lock_irqsave(&(q)->lock, flags) 56 #define snd_seq_oss_readq_unlock(q, flags) spin_unlock_irqrestore(&(q)->lock, flags) 57 58 #endif 59