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 
33 struct snd_seq_user_client {
34 	struct file *file;	/* file struct of client */
35 	/* ... */
36 
37 	/* fifo */
38 	struct snd_seq_fifo *fifo;	/* queue for incoming events */
39 	int fifo_pool_size;
40 };
41 
42 struct snd_seq_kernel_client {
43 	/* ... */
44 };
45 
46 
47 struct snd_seq_client {
48 	snd_seq_client_type_t type;
49 	unsigned int accept_input: 1,
50 		accept_output: 1;
51 	char name[64];		/* client name */
52 	int number;		/* client number */
53 	unsigned int filter;	/* filter flags */
54 	DECLARE_BITMAP(event_filter, 256);
55 	snd_use_lock_t use_lock;
56 	int event_lost;
57 	/* ports */
58 	int num_ports;		/* number of ports */
59 	struct list_head ports_list_head;
60 	rwlock_t ports_lock;
61 	struct mutex ports_mutex;
62 	int convert32;		/* convert 32->64bit */
63 
64 	/* output pool */
65 	struct snd_seq_pool *pool;		/* memory pool for this client */
66 
67 	union {
68 		struct snd_seq_user_client user;
69 		struct snd_seq_kernel_client kernel;
70 	} data;
71 };
72 
73 /* usage statistics */
74 struct snd_seq_usage {
75 	int cur;
76 	int peak;
77 };
78 
79 
80 int client_init_data(void);
81 int snd_sequencer_device_init(void);
82 void snd_sequencer_device_done(void);
83 
84 /* get locked pointer to client */
85 struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
86 
87 /* unlock pointer to client */
88 #define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
89 
90 /* dispatch event to client(s) */
91 int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
92 
93 /* exported to other modules */
94 int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
95 int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
96 					   struct file *file, int atomic, int hop);
97 int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
98 int snd_seq_client_notify_subscription(int client, int port,
99 				       struct snd_seq_port_subscribe *info, int evtype);
100 
101 extern int seq_client_load[15];
102 
103 #endif
104