You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
2.9 KiB
90 lines
2.9 KiB
20 years ago
|
/*
|
||
|
|
* Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of version 2 of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it would be useful, but
|
||
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||
|
|
*
|
||
|
|
* Further, this software is distributed without any warranty that it is
|
||
|
|
* free of the rightful claim of any third person regarding infringement
|
||
|
|
* or the like. Any license provided herein, whether implied or
|
||
|
|
* otherwise, applies only to this software file. Patent licenses, if
|
||
|
|
* any, provided herein do not apply to combinations of this program with
|
||
|
|
* other software, or any other product whatsoever.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along
|
||
|
|
* with this program; if not, write the Free Software Foundation, Inc., 59
|
||
|
|
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
||
|
|
*
|
||
|
|
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
|
||
|
|
* Mountain View, CA 94043, or:
|
||
|
|
*
|
||
|
|
* http://www.sgi.com
|
||
|
|
*
|
||
|
|
* For further information regarding this notice, see:
|
||
|
|
*
|
||
|
|
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
|
||
|
|
*/
|
||
|
|
#ifndef __XFS_SUPPORT_SV_H__
|
||
|
|
#define __XFS_SUPPORT_SV_H__
|
||
|
|
|
||
|
|
#include <linux/wait.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Synchronisation variables.
|
||
|
|
*
|
||
|
|
* (Parameters "pri", "svf" and "rts" are not implemented)
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef struct sv_s {
|
||
|
|
wait_queue_head_t waiters;
|
||
|
|
} sv_t;
|
||
|
|
|
||
|
|
#define SV_FIFO 0x0 /* sv_t is FIFO type */
|
||
|
|
#define SV_LIFO 0x2 /* sv_t is LIFO type */
|
||
|
|
#define SV_PRIO 0x4 /* sv_t is PRIO type */
|
||
|
|
#define SV_KEYED 0x6 /* sv_t is KEYED type */
|
||
|
|
#define SV_DEFAULT SV_FIFO
|
||
|
|
|
||
|
|
|
||
|
|
static inline void _sv_wait(sv_t *sv, spinlock_t *lock, int state,
|
||
|
|
unsigned long timeout)
|
||
|
|
{
|
||
|
|
DECLARE_WAITQUEUE(wait, current);
|
||
|
|
|
||
|
|
add_wait_queue_exclusive(&sv->waiters, &wait);
|
||
|
|
__set_current_state(state);
|
||
|
|
spin_unlock(lock);
|
||
|
|
|
||
|
|
schedule_timeout(timeout);
|
||
|
|
|
||
|
|
remove_wait_queue(&sv->waiters, &wait);
|
||
|
|
}
|
||
|
|
|
||
|
|
#define init_sv(sv,type,name,flag) \
|
||
|
|
init_waitqueue_head(&(sv)->waiters)
|
||
|
|
#define sv_init(sv,flag,name) \
|
||
|
|
init_waitqueue_head(&(sv)->waiters)
|
||
|
|
#define sv_destroy(sv) \
|
||
|
|
/*NOTHING*/
|
||
|
|
#define sv_wait(sv, pri, lock, s) \
|
||
|
|
_sv_wait(sv, lock, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT)
|
||
|
|
#define sv_wait_sig(sv, pri, lock, s) \
|
||
|
|
_sv_wait(sv, lock, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT)
|
||
|
|
#define sv_timedwait(sv, pri, lock, s, svf, ts, rts) \
|
||
|
|
_sv_wait(sv, lock, TASK_UNINTERRUPTIBLE, timespec_to_jiffies(ts))
|
||
|
|
#define sv_timedwait_sig(sv, pri, lock, s, svf, ts, rts) \
|
||
|
|
_sv_wait(sv, lock, TASK_INTERRUPTIBLE, timespec_to_jiffies(ts))
|
||
|
|
#define sv_signal(sv) \
|
||
|
|
wake_up(&(sv)->waiters)
|
||
|
|
#define sv_broadcast(sv) \
|
||
|
|
wake_up_all(&(sv)->waiters)
|
||
|
|
|
||
|
|
#endif /* __XFS_SUPPORT_SV_H__ */
|