LXR linux/sound/core/seq/seq

   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        struct pid *owner;
  37        
  38        /* fifo */
  39        struct snd_seq_fifo *fifo;      /* queue for incoming events */
  40        int fifo_pool_size;
  41};
  42
  43struct snd_seq_kernel_client {
  44        /* ... */
  45        struct snd_card *card;
  46};
  47
  48
  49struct 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        struct mutex ioctl_mutex;
  65        int convert32;          /* convert 32->64bit */
  66
  67        /* output pool */
  68        struct snd_seq_pool *pool;              /* memory pool for this client */
  69
  70        union {
  71                struct snd_seq_user_client user;
  72                struct snd_seq_kernel_client kernel;
  73        } data;
  74};
  75
  76/* usage statistics */
  77struct snd_seq_usage {
  78        int cur;
  79        int peak;
  80};
  81
  82
  83int client_init_data(void);
  84int snd_sequencer_device_init(void);
  85void snd_sequencer_device_done(void);
  86
  87/* get locked pointer to client */
  88struct snd_seq_client *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) */
  94int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
  95
  96/* exported to other modules */
  97int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
  98int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
  99                                           struct file *file, int atomic, int hop);
 100int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
 101int snd_seq_client_notify_subscription(int client, int port,
 102                                       struct snd_seq_port_subscribe *info, int evtype);
 103
 104extern int seq_client_load[15];
 105
 106#endif
 107