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00976ad527
The sequencer core module doesn't call some destructors in the error path of the init code, which may leave some resources. This patch mainly fix these leaks by calling the destructors appropriately at alsa_seq_init(). Also the patch brings a few cleanups along with it, namely: - Expand the old "if ((err = xxx) < 0)" coding style - Get rid of empty seq_queue_init() and its caller - Change snd_seq_info_done() to void Last but not least, a couple of functions lose __exit annotation since they are called also in alsa_seq_init(). No functional changes but minor code cleanups. Signed-off-by: Takashi Iwai <tiwai@suse.de>
137 lines
4.3 KiB
C
137 lines
4.3 KiB
C
/*
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* ALSA sequencer Queue handling
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* Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __SND_SEQ_QUEUE_H
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#define __SND_SEQ_QUEUE_H
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#include "seq_memory.h"
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#include "seq_prioq.h"
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#include "seq_timer.h"
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#include "seq_lock.h"
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/bitops.h>
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#define SEQ_QUEUE_NO_OWNER (-1)
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struct snd_seq_queue {
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int queue; /* queue number */
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char name[64]; /* name of this queue */
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struct snd_seq_prioq *tickq; /* midi tick event queue */
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struct snd_seq_prioq *timeq; /* real-time event queue */
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struct snd_seq_timer *timer; /* time keeper for this queue */
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int owner; /* client that 'owns' the timer */
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unsigned int locked:1, /* timer is only accesibble by owner if set */
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klocked:1, /* kernel lock (after START) */
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check_again:1,
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check_blocked:1;
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unsigned int flags; /* status flags */
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unsigned int info_flags; /* info for sync */
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spinlock_t owner_lock;
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spinlock_t check_lock;
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/* clients which uses this queue (bitmap) */
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DECLARE_BITMAP(clients_bitmap, SNDRV_SEQ_MAX_CLIENTS);
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unsigned int clients; /* users of this queue */
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struct mutex timer_mutex;
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snd_use_lock_t use_lock;
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};
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/* get the number of current queues */
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int snd_seq_queue_get_cur_queues(void);
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/* delete queues */
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void snd_seq_queues_delete(void);
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/* create new queue (constructor) */
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struct snd_seq_queue *snd_seq_queue_alloc(int client, int locked, unsigned int flags);
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/* delete queue (destructor) */
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int snd_seq_queue_delete(int client, int queueid);
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/* notification that client has left the system */
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void snd_seq_queue_client_termination(int client);
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/* final stage */
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void snd_seq_queue_client_leave(int client);
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/* enqueue a event received from one the clients */
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int snd_seq_enqueue_event(struct snd_seq_event_cell *cell, int atomic, int hop);
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/* Remove events */
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void snd_seq_queue_client_leave_cells(int client);
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void snd_seq_queue_remove_cells(int client, struct snd_seq_remove_events *info);
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/* return pointer to queue structure for specified id */
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struct snd_seq_queue *queueptr(int queueid);
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/* unlock */
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#define queuefree(q) snd_use_lock_free(&(q)->use_lock)
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/* return the (first) queue matching with the specified name */
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struct snd_seq_queue *snd_seq_queue_find_name(char *name);
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/* check single queue and dispatch events */
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void snd_seq_check_queue(struct snd_seq_queue *q, int atomic, int hop);
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/* access to queue's parameters */
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int snd_seq_queue_check_access(int queueid, int client);
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int snd_seq_queue_timer_set_tempo(int queueid, int client, struct snd_seq_queue_tempo *info);
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int snd_seq_queue_set_owner(int queueid, int client, int locked);
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int snd_seq_queue_set_locked(int queueid, int client, int locked);
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int snd_seq_queue_timer_open(int queueid);
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int snd_seq_queue_timer_close(int queueid);
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int snd_seq_queue_use(int queueid, int client, int use);
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int snd_seq_queue_is_used(int queueid, int client);
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int snd_seq_control_queue(struct snd_seq_event *ev, int atomic, int hop);
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/*
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* 64bit division - for sync stuff..
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*/
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#if defined(i386) || defined(i486)
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#define udiv_qrnnd(q, r, n1, n0, d) \
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__asm__ ("divl %4" \
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: "=a" ((u32)(q)), \
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"=d" ((u32)(r)) \
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: "0" ((u32)(n0)), \
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"1" ((u32)(n1)), \
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"rm" ((u32)(d)))
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#define u64_div(x,y,q) do {u32 __tmp; udiv_qrnnd(q, __tmp, (x)>>32, x, y);} while (0)
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#define u64_mod(x,y,r) do {u32 __tmp; udiv_qrnnd(__tmp, q, (x)>>32, x, y);} while (0)
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#define u64_divmod(x,y,q,r) udiv_qrnnd(q, r, (x)>>32, x, y)
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#else
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#define u64_div(x,y,q) ((q) = (u32)((u64)(x) / (u64)(y)))
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#define u64_mod(x,y,r) ((r) = (u32)((u64)(x) % (u64)(y)))
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#define u64_divmod(x,y,q,r) (u64_div(x,y,q), u64_mod(x,y,r))
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#endif
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#endif
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