linux-stable/fs/xfs/linux-2.6/sv.h
Christoph Hellwig 63ad2a5c4c remove dead code from sv_t implementation
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
2008-12-04 15:39:21 +11:00

59 lines
1.6 KiB
C

/*
* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* 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.
*
* 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. 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 the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#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;
static inline void _sv_wait(sv_t *sv, spinlock_t *lock)
{
DECLARE_WAITQUEUE(wait, current);
add_wait_queue_exclusive(&sv->waiters, &wait);
__set_current_state(TASK_UNINTERRUPTIBLE);
spin_unlock(lock);
schedule();
remove_wait_queue(&sv->waiters, &wait);
}
#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)
#define sv_signal(sv) \
wake_up(&(sv)->waiters)
#define sv_broadcast(sv) \
wake_up_all(&(sv)->waiters)
#endif /* __XFS_SUPPORT_SV_H__ */