1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * ALSA sequencer Client Manager 4 * Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl> 5 */ 6 #ifndef __SND_SEQ_CLIENTMGR_H 7 #define __SND_SEQ_CLIENTMGR_H 8 9 #include <sound/seq_kernel.h> 10 #include <linux/bitops.h> 11 #include "seq_fifo.h" 12 #include "seq_ports.h" 13 #include "seq_lock.h" 14 15 16 /* client manager */ 17 18 struct snd_seq_user_client { 19 struct file *file; /* file struct of client */ 20 /* ... */ 21 struct pid *owner; 22 23 /* fifo */ 24 struct snd_seq_fifo *fifo; /* queue for incoming events */ 25 int fifo_pool_size; 26 }; 27 28 struct snd_seq_kernel_client { 29 /* ... */ 30 struct snd_card *card; 31 }; 32 33 34 struct snd_seq_client { 35 snd_seq_client_type_t type; 36 unsigned int accept_input: 1, 37 accept_output: 1; 38 char name[64]; /* client name */ 39 int number; /* client number */ 40 unsigned int filter; /* filter flags */ 41 DECLARE_BITMAP(event_filter, 256); 42 snd_use_lock_t use_lock; 43 int event_lost; 44 /* ports */ 45 int num_ports; /* number of ports */ 46 struct list_head ports_list_head; 47 rwlock_t ports_lock; 48 struct mutex ports_mutex; 49 struct mutex ioctl_mutex; 50 int convert32; /* convert 32->64bit */ 51 52 /* output pool */ 53 struct snd_seq_pool *pool; /* memory pool for this client */ 54 55 union { 56 struct snd_seq_user_client user; 57 struct snd_seq_kernel_client kernel; 58 } data; 59 }; 60 61 /* usage statistics */ 62 struct snd_seq_usage { 63 int cur; 64 int peak; 65 }; 66 67 68 int client_init_data(void); 69 int snd_sequencer_device_init(void); 70 void snd_sequencer_device_done(void); 71 72 /* get locked pointer to client */ 73 struct snd_seq_client *snd_seq_client_use_ptr(int clientid); 74 75 /* unlock pointer to client */ 76 #define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock) 77 78 /* dispatch event to client(s) */ 79 int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop); 80 81 int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait); 82 int snd_seq_client_notify_subscription(int client, int port, 83 struct snd_seq_port_subscribe *info, int evtype); 84 85 /* only for OSS sequencer */ 86 bool snd_seq_client_ioctl_lock(int clientid); 87 void snd_seq_client_ioctl_unlock(int clientid); 88 89 extern int seq_client_load[15]; 90 91 #endif 92