| /* |
| * 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__ */ |
