1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *   ALSA sequencer Client Manager
4  *   Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
5  */
6 #ifndef __SND_SEQ_CLIENTMGR_H
7 #define __SND_SEQ_CLIENTMGR_H
8 
9 #include <sound/seq_kernel.h>
10 #include <linux/bitops.h>
11 #include "seq_fifo.h"
12 #include "seq_ports.h"
13 #include "seq_lock.h"
14 
15 
16 /* client manager */
17 
18 struct snd_seq_user_client {
19 	struct file *file;	/* file struct of client */
20 	/* ... */
21 	struct pid *owner;
22 
23 	/* fifo */
24 	struct snd_seq_fifo *fifo;	/* queue for incoming events */
25 	int fifo_pool_size;
26 };
27 
28 struct snd_seq_kernel_client {
29 	/* ... */
30 	struct snd_card *card;
31 };
32 
33 
34 struct snd_seq_client {
35 	snd_seq_client_type_t type;
36 	unsigned int accept_input: 1,
37 		accept_output: 1;
38 	char name[64];		/* client name */
39 	int number;		/* client number */
40 	unsigned int filter;	/* filter flags */
41 	DECLARE_BITMAP(event_filter, 256);
42 	snd_use_lock_t use_lock;
43 	int event_lost;
44 	/* ports */
45 	int num_ports;		/* number of ports */
46 	struct list_head ports_list_head;
47 	rwlock_t ports_lock;
48 	struct mutex ports_mutex;
49 	struct mutex ioctl_mutex;
50 	int convert32;		/* convert 32->64bit */
51 
52 	/* output pool */
53 	struct snd_seq_pool *pool;		/* memory pool for this client */
54 
55 	union {
56 		struct snd_seq_user_client user;
57 		struct snd_seq_kernel_client kernel;
58 	} data;
59 };
60 
61 /* usage statistics */
62 struct snd_seq_usage {
63 	int cur;
64 	int peak;
65 };
66 
67 
68 int client_init_data(void);
69 int snd_sequencer_device_init(void);
70 void snd_sequencer_device_done(void);
71 
72 /* get locked pointer to client */
73 struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
74 
75 /* unlock pointer to client */
76 #define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
77 
78 /* dispatch event to client(s) */
79 int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
80 
81 int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
82 int snd_seq_client_notify_subscription(int client, int port,
83 				       struct snd_seq_port_subscribe *info, int evtype);
84 
85 /* only for OSS sequencer */
86 bool snd_seq_client_ioctl_lock(int clientid);
87 void snd_seq_client_ioctl_unlock(int clientid);
88 
89 extern int seq_client_load[15];
90 
91 #endif
92