text: /*
   *   ALSA sequencer Client Manager
   *   Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
   *
   *
   *   This program is free software; you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   This program is distributed in the hope that it will be useful,
   *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *   GNU General Public License for more details.
   *
   *   You should have received a copy of the GNU General Public License
   *   along with this program; if not, write to the Free Software
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   *
   */
  #ifndef __SND_SEQ_CLIENTMGR_H
  #define __SND_SEQ_CLIENTMGR_H
  
  #include <sound/seq_kernel.h>
  #include <linux/bitops.h>
  #include "seq_fifo.h"
  #include "seq_ports.h"
  #include "seq_lock.h"
  
  
  /* client manager */
  
  struct snd_seq_user_client {
  	struct file *file;	/* file struct of client */
  	/* ... */
  	struct pid *owner;
  	
  	/* fifo */
  	struct snd_seq_fifo *fifo;	/* queue for incoming events */
  	int fifo_pool_size;
  };
  
  struct snd_seq_kernel_client {
  	/* ... */
  	struct snd_card *card;
  };
  
  
  struct snd_seq_client {
  	snd_seq_client_type_t type;
  	unsigned int accept_input: 1,
  		accept_output: 1;
  	char name[64];		/* client name */
  	int number;		/* client number */
  	unsigned int filter;	/* filter flags */
  	DECLARE_BITMAP(event_filter, 256);
  	snd_use_lock_t use_lock;
  	int event_lost;
  	/* ports */
  	int num_ports;		/* number of ports */
  	struct list_head ports_list_head;
  	rwlock_t ports_lock;
  	struct mutex ports_mutex;
  	struct mutex ioctl_mutex;
  	int convert32;		/* convert 32->64bit */
  
  	/* output pool */
  	struct snd_seq_pool *pool;		/* memory pool for this client */
  
  	union {
  		struct snd_seq_user_client user;
  		struct snd_seq_kernel_client kernel;
  	} data;
  };
  
  /* usage statistics */
  struct snd_seq_usage {
  	int cur;
  	int peak;
  };
  
  
  int client_init_data(void);
  int snd_sequencer_device_init(void);
  void snd_sequencer_device_done(void);
  
  /* get locked pointer to client */
  struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
  
  /* unlock pointer to client */
  #define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
  
  /* dispatch event to client(s) */
  int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
  
  /* exported to other modules */
  int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
  int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
  					   struct file *file, int atomic, int hop);
  int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
  int snd_seq_client_notify_subscription(int client, int port,
  				       struct snd_seq_port_subscribe *info, int evtype);
  
  extern int seq_client_load[15];
  
  #endif
  