2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 #ifndef __XFS_SUPPORT_MUTEX_H__
19 #define __XFS_SUPPORT_MUTEX_H__
21 #include <linux/spinlock.h>
22 #include <asm/semaphore.h>
25 * Map the mutex'es from IRIX to Linux semaphores.
27 * Destroy just simply initializes to -99 which should block all other
30 #define MUTEX_DEFAULT 0x0
31 typedef struct semaphore mutex_t;
33 #define mutex_init(lock, type, name) sema_init(lock, 1)
34 #define mutex_destroy(lock) sema_init(lock, -99)
35 #define mutex_lock(lock, num) down(lock)
36 #define mutex_trylock(lock) (down_trylock(lock) ? 0 : 1)
37 #define mutex_unlock(lock) up(lock)
39 #endif /* __XFS_SUPPORT_MUTEX_H__ */