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Diffstat (limited to 'sound/core/seq/seq_queue.h')
| -rw-r--r-- | sound/core/seq/seq_queue.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/sound/core/seq/seq_queue.h b/sound/core/seq/seq_queue.h new file mode 100644 index 00000000000..b1bf5519fb3 --- /dev/null +++ b/sound/core/seq/seq_queue.h @@ -0,0 +1,140 @@ +/* + * 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 */ + + prioq_t *tickq; /* midi tick event queue */ + prioq_t *timeq; /* real-time event queue */ + + seq_timer_t *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(snd_seq_event_cell_t *cell, int atomic, int hop); + +/* Remove events */ +void snd_seq_queue_client_leave_cells(int client); +void snd_seq_queue_remove_cells(int client, snd_seq_remove_events_t *info); + +/* return pointer to queue structure for specified id */ +queue_t *queueptr(int queueid); +/* unlock */ +#define queuefree(q) snd_use_lock_free(&(q)->use_lock) + +/* return the (first) queue matching with the specified name */ +queue_t *snd_seq_queue_find_name(char *name); + +/* check single queue and dispatch events */ +void snd_seq_check_queue(queue_t *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, snd_seq_queue_tempo_t *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(snd_seq_event_t *ev, int atomic, int hop); +void snd_seq_queue_process_event(queue_t *q, snd_seq_event_t *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 |