| /* |
| * ALSA sequencer Queue handling |
| * 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_QUEUE_H |
| #define __SND_SEQ_QUEUE_H |
| |
| #include "seq_memory.h" |
| #include "seq_prioq.h" |
| #include "seq_timer.h" |
| #include "seq_lock.h" |
| #include <linux/interrupt.h> |
| #include <linux/list.h> |
| #include <linux/bitops.h> |
| |
| #define SEQ_QUEUE_NO_OWNER (-1) |
| |
| struct snd_seq_queue { |
| int queue; /* queue number */ |
| |
| char name[64]; /* name of this queue */ |
| |
| struct snd_seq_prioq *tickq; /* midi tick event queue */ |
| struct snd_seq_prioq *timeq; /* real-time event queue */ |
| |
| struct snd_seq_timer *timer; /* time keeper for this queue */ |
| int owner; /* client that 'owns' the timer */ |
| unsigned int locked:1, /* timer is only accesibble by owner if set */ |
| klocked:1, /* kernel lock (after START) */ |
| check_again:1, |
| check_blocked:1; |
| |
| unsigned int flags; /* status flags */ |
| unsigned int info_flags; /* info for sync */ |
| |
| spinlock_t owner_lock; |
| spinlock_t check_lock; |
| |
| /* clients which uses this queue (bitmap) */ |
| DECLARE_BITMAP(clients_bitmap, SNDRV_SEQ_MAX_CLIENTS); |
| unsigned int clients; /* users of this queue */ |
| struct semaphore timer_mutex; |
| |
| snd_use_lock_t use_lock; |
| }; |
| |
| |
| /* get the number of current queues */ |
| int snd_seq_queue_get_cur_queues(void); |
| |
| /* init queues structure */ |
| int snd_seq_queues_init(void); |
| |
| /* delete queues */ |
| void snd_seq_queues_delete(void); |
| |
| |
| /* create new queue (constructor) */ |
| int snd_seq_queue_alloc(int client, int locked, unsigned int flags); |
| |
| /* delete queue (destructor) */ |
| int snd_seq_queue_delete(int client, int queueid); |
| |
| /* notification that client has left the system */ |
| void snd_seq_queue_client_termination(int client); |
| |
| /* final stage */ |
| void snd_seq_queue_client_leave(int client); |
| |
| /* enqueue a event received from one the clients */ |
| int snd_seq_enqueue_event(struct snd_seq_event_cell *cell, int atomic, int hop); |
| |
| /* Remove events */ |
| void snd_seq_queue_client_leave_cells(int client); |
| void snd_seq_queue_remove_cells(int client, struct snd_seq_remove_events *info); |
| |
| /* return pointer to queue structure for specified id */ |
| struct snd_seq_queue *queueptr(int queueid); |
| /* unlock */ |
| #define queuefree(q) snd_use_lock_free(&(q)->use_lock) |
| |
| /* return the (first) queue matching with the specified name */ |
| struct snd_seq_queue *snd_seq_queue_find_name(char *name); |
| |
| /* check single queue and dispatch events */ |
| void snd_seq_check_queue(struct snd_seq_queue *q, int atomic, int hop); |
| |
| /* access to queue's parameters */ |
| int snd_seq_queue_check_access(int queueid, int client); |
| int snd_seq_queue_timer_set_tempo(int queueid, int client, struct snd_seq_queue_tempo *info); |
| int snd_seq_queue_set_owner(int queueid, int client, int locked); |
| int snd_seq_queue_set_locked(int queueid, int client, int locked); |
| int snd_seq_queue_timer_open(int queueid); |
| int snd_seq_queue_timer_close(int queueid); |
| int snd_seq_queue_use(int queueid, int client, int use); |
| int snd_seq_queue_is_used(int queueid, int client); |
| |
| int snd_seq_control_queue(struct snd_seq_event *ev, int atomic, int hop); |
| |
| /* |
| * 64bit division - for sync stuff.. |
| */ |
| #if defined(i386) || defined(i486) |
| |
| #define udiv_qrnnd(q, r, n1, n0, d) \ |
| __asm__ ("divl %4" \ |
| : "=a" ((u32)(q)), \ |
| "=d" ((u32)(r)) \ |
| : "0" ((u32)(n0)), \ |
| "1" ((u32)(n1)), \ |
| "rm" ((u32)(d))) |
| |
| #define u64_div(x,y,q) do {u32 __tmp; udiv_qrnnd(q, __tmp, (x)>>32, x, y);} while (0) |
| #define u64_mod(x,y,r) do {u32 __tmp; udiv_qrnnd(__tmp, q, (x)>>32, x, y);} while (0) |
| #define u64_divmod(x,y,q,r) udiv_qrnnd(q, r, (x)>>32, x, y) |
| |
| #else |
| #define u64_div(x,y,q) ((q) = (u32)((u64)(x) / (u64)(y))) |
| #define u64_mod(x,y,r) ((r) = (u32)((u64)(x) % (u64)(y))) |
| #define u64_divmod(x,y,q,r) (u64_div(x,y,q), u64_mod(x,y,r)) |
| #endif |
| |
| |
| #endif |