sound/core/seq/seq_clientmgr.h

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