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* ALSA sequencer Client Manager
* Copyright (c) 1998-1999 by Frank van de Pol <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include <sound/seq_kernel.h>
#include <linux/bitops.h>
#include "seq_fifo.h"
#include "seq_ports.h"
#include "seq_lock.h"
/* client manager */
struct snd_seq_user_client {
struct file *file; /* file struct of client */
/* ... */
struct pid *owner;
/* fifo */
struct snd_seq_fifo *fifo; /* queue for incoming events */
int fifo_pool_size;
struct snd_seq_kernel_client {
/* ... */
struct snd_card *card;
struct snd_seq_client {
snd_seq_client_type_t type;
unsigned int accept_input: 1,
accept_output: 1;
char name[64]; /* client name */
int number; /* client number */
unsigned int filter; /* filter flags */
DECLARE_BITMAP(event_filter, 256);
snd_use_lock_t use_lock;
int event_lost;
/* ports */
int num_ports; /* number of ports */
struct list_head ports_list_head;
rwlock_t ports_lock;
struct mutex ports_mutex;
int convert32; /* convert 32->64bit */
/* output pool */
struct snd_seq_pool *pool; /* memory pool for this client */
union {
struct snd_seq_user_client user;
struct snd_seq_kernel_client kernel;
} data;
/* usage statistics */
struct snd_seq_usage {
int cur;
int peak;
int client_init_data(void);
int snd_sequencer_device_init(void);
void snd_sequencer_device_done(void);
/* get locked pointer to client */
struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
/* unlock pointer to client */
#define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
/* dispatch event to client(s) */
int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
/* exported to other modules */
int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
struct file *file, int atomic, int hop);
int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
int snd_seq_client_notify_subscription(int client, int port,
struct snd_seq_port_subscribe *info, int evtype);
extern int seq_client_load[15];