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 fifo_t *fifo; /* queue for incoming events */ 39 int fifo_pool_size; 40 }; 41 42 struct _snd_seq_kernel_client { 43 snd_card_t *card; 44 /* pointer to client functions */ 45 void *private_data; /* private data for client */ 46 /* ... */ 47 }; 48 49 50 struct _snd_seq_client { 51 snd_seq_client_type_t type; 52 unsigned int accept_input: 1, 53 accept_output: 1; 54 char name[64]; /* client name */ 55 int number; /* client number */ 56 unsigned int filter; /* filter flags */ 57 DECLARE_BITMAP(event_filter, 256); 58 snd_use_lock_t use_lock; 59 int event_lost; 60 /* ports */ 61 int num_ports; /* number of ports */ 62 struct list_head ports_list_head; 63 rwlock_t ports_lock; 64 struct semaphore ports_mutex; 65 int convert32; /* convert 32->64bit */ 66 67 /* output pool */ 68 pool_t *pool; /* memory pool for this client */ 69 70 union { 71 user_client_t user; 72 kernel_client_t kernel; 73 } data; 74 }; 75 76 /* usage statistics */ 77 typedef struct { 78 int cur; 79 int peak; 80 } usage_t; 81 82 83 extern int client_init_data(void); 84 extern int snd_sequencer_device_init(void); 85 extern void snd_sequencer_device_done(void); 86 87 /* get locked pointer to client */ 88 extern client_t *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) */ 94 extern int snd_seq_dispatch_event(snd_seq_event_cell_t *cell, int atomic, int hop); 95 96 /* exported to other modules */ 97 extern int snd_seq_register_kernel_client(snd_seq_client_callback_t *callback, void *private_data); 98 extern int snd_seq_unregister_kernel_client(int client); 99 extern int snd_seq_kernel_client_enqueue(int client, snd_seq_event_t *ev, int atomic, int hop); 100 int snd_seq_kernel_client_enqueue_blocking(int client, snd_seq_event_t * ev, struct file *file, int atomic, int hop); 101 int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait); 102 int snd_seq_client_notify_subscription(int client, int port, snd_seq_port_subscribe_t *info, int evtype); 103 104 #endif 105