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/*
* Copyright (c) 2000-2003,2005 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_MUTEX_H__
#define __XFS_SUPPORT_MUTEX_H__
#include <linux/spinlock.h>
#include <asm/semaphore.h>
/*
* Map the mutex'es from IRIX to Linux semaphores.
*
* Destroy just simply initializes to -99 which should block all other
* callers.
*/
#define MUTEX_DEFAULT 0x0
typedef struct semaphore mutex_t;
#define mutex_init(lock, type, name) sema_init(lock, 1)
#define mutex_destroy(lock) sema_init(lock, -99)
#define mutex_lock(lock, num) down(lock)
#define mutex_trylock(lock) (down_trylock(lock) ? 0 : 1)
#define mutex_unlock(lock) up(lock)
#endif /* __XFS_SUPPORT_MUTEX_H__ */
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