92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* ALSA sequencer Client Manager
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* Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
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*/
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#ifndef __SND_SEQ_CLIENTMGR_H
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#define __SND_SEQ_CLIENTMGR_H
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#include <sound/seq_kernel.h>
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#include <linux/bitops.h>
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#include "seq_fifo.h"
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#include "seq_ports.h"
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#include "seq_lock.h"
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/* client manager */
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struct snd_seq_user_client {
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struct file *file; /* file struct of client */
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/* ... */
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struct pid *owner;
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/* fifo */
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struct snd_seq_fifo *fifo; /* queue for incoming events */
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int fifo_pool_size;
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};
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struct snd_seq_kernel_client {
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/* ... */
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struct snd_card *card;
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};
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struct snd_seq_client {
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snd_seq_client_type_t type;
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unsigned int accept_input: 1,
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accept_output: 1;
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char name[64]; /* client name */
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int number; /* client number */
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unsigned int filter; /* filter flags */
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DECLARE_BITMAP(event_filter, 256);
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snd_use_lock_t use_lock;
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int event_lost;
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/* ports */
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int num_ports; /* number of ports */
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struct list_head ports_list_head;
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rwlock_t ports_lock;
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struct mutex ports_mutex;
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struct mutex ioctl_mutex;
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int convert32; /* convert 32->64bit */
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/* output pool */
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struct snd_seq_pool *pool; /* memory pool for this client */
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union {
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struct snd_seq_user_client user;
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struct snd_seq_kernel_client kernel;
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} data;
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};
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/* usage statistics */
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struct snd_seq_usage {
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int cur;
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int peak;
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};
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int client_init_data(void);
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int snd_sequencer_device_init(void);
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void snd_sequencer_device_done(void);
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/* get locked pointer to client */
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struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
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/* unlock pointer to client */
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#define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
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/* dispatch event to client(s) */
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int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
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int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
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int snd_seq_client_notify_subscription(int client, int port,
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struct snd_seq_port_subscribe *info, int evtype);
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/* only for OSS sequencer */
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bool snd_seq_client_ioctl_lock(int clientid);
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void snd_seq_client_ioctl_unlock(int clientid);
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extern int seq_client_load[15];
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#endif
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