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