60 lines
1.6 KiB
C
60 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__ */
|