projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. | |
| 1da177e4 | 4 | * |
| 7b718769 NS |
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 | |
| 1da177e4 LT |
7 | * published by the Free Software Foundation. |
| 8 | * | |
| 7b718769 NS |
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. | |
| 1da177e4 | 13 | * |
| 7b718769 NS |
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 | |
| 1da177e4 LT |
17 | */ |
| 18 | #ifndef __XFS_SUPPORT_MUTEX_H__ | |
| 19 | #define __XFS_SUPPORT_MUTEX_H__ | |
| 20 | ||
| 21 | #include <linux/spinlock.h> | |
| 22 | #include <asm/semaphore.h> | |
| 23 | ||
| 24 | /* | |
| 25 | * Map the mutex'es from IRIX to Linux semaphores. | |
| 26 | * | |
| 27 | * Destroy just simply initializes to -99 which should block all other | |
| 28 | * callers. | |
| 29 | */ | |
| 30 | #define MUTEX_DEFAULT 0x0 | |
| 31 | typedef struct semaphore mutex_t; | |
| 32 | ||
| 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) | |
| 38 | ||
| 39 | #endif /* __XFS_SUPPORT_MUTEX_H__ */ |