/*
* 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__ */
