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linux
1/*
2 * ALSA sequencer Client Manager
3 * Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21#ifndef __SND_SEQ_CLIENTMGR_H
22#define __SND_SEQ_CLIENTMGR_H
23
24#include <sound/seq_kernel.h>
25#include <linux/bitops.h>
26#include "seq_fifo.h"
27#include "seq_ports.h"
28#include "seq_lock.h"
29
30
31/* client manager */
32
33struct _snd_seq_user_client {
34 struct file *file; /* file struct of client */
35 /* ... */
36
37 /* fifo */
38 fifo_t *fifo; /* queue for incoming events */
39 int fifo_pool_size;
40};
41
42struct _snd_seq_kernel_client {
43 snd_card_t *card;
44 /* pointer to client functions */
45 void *private_data; /* private data for client */
46 /* ... */
47};
48
49
50struct _snd_seq_client {
51 snd_seq_client_type_t type;
52 unsigned int accept_input: 1,
53 accept_output: 1;
54 char name[64]; /* client name */
55 int number; /* client number */
56 unsigned int filter; /* filter flags */
57 DECLARE_BITMAP(event_filter, 256);
58 snd_use_lock_t use_lock;
59 int event_lost;
60 /* ports */
61 int num_ports; /* number of ports */
62 struct list_head ports_list_head;
63 rwlock_t ports_lock;
64 struct semaphore ports_mutex;
65 int convert32; /* convert 32->64bit */
66
67 /* output pool */
68 pool_t *pool; /* memory pool for this client */
69
70 union {
71 user_client_t user;
72 kernel_client_t kernel;
73 } data;
74};
75
76/* usage statistics */
77typedef struct {
78 int cur;
79 int peak;
80} usage_t;
81
82
83extern int client_init_data(void);
84extern int snd_sequencer_device_init(void);
85extern void snd_sequencer_device_done(void);
86
87/* get locked pointer to client */
88extern client_t *snd_seq_client_use_ptr(int clientid);
89
90/* unlock pointer to client */
91#define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
92
93/* dispatch event to client(s) */
94extern int snd_seq_dispatch_event(snd_seq_event_cell_t *cell, int atomic, int hop);
95
96/* exported to other modules */
97extern int snd_seq_register_kernel_client(snd_seq_client_callback_t *callback, void *private_data);
98extern int snd_seq_unregister_kernel_client(int client);
99extern int snd_seq_kernel_client_enqueue(int client, snd_seq_event_t *ev, int atomic, int hop);
100int snd_seq_kernel_client_enqueue_blocking(int client, snd_seq_event_t * ev, struct file *file, int atomic, int hop);
101int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
102int snd_seq_client_notify_subscription(int client, int port, snd_seq_port_subscribe_t *info, int evtype);
103
104#endif