| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it is |
| 13 | * free of the rightful claim of any third person regarding infringement |
| 14 | * or the like. Any license provided herein, whether implied or |
| 15 | * otherwise, applies only to this software file. Patent licenses, if |
| 16 | * any, provided herein do not apply to combinations of this program with |
| 17 | * other software, or any other product whatsoever. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write the Free Software Foundation, Inc., 59 |
| 21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 22 | * |
| 23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, |
| 24 | * Mountain View, CA 94043, or: |
| 25 | * |
| 26 | * http://www.sgi.com |
| 27 | * |
| 28 | * For further information regarding this notice, see: |
| 29 | * |
| 30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ |
| 31 | */ |
| 32 | #ifndef __XFS_SUPPORT_MUTEX_H__ |
| 33 | #define __XFS_SUPPORT_MUTEX_H__ |
| 34 | |
| 35 | #include <linux/spinlock.h> |
| 36 | #include <asm/semaphore.h> |
| 37 | |
| 38 | /* |
| 39 | * Map the mutex'es from IRIX to Linux semaphores. |
| 40 | * |
| 41 | * Destroy just simply initializes to -99 which should block all other |
| 42 | * callers. |
| 43 | */ |
| 44 | #define MUTEX_DEFAULT 0x0 |
| 45 | typedef struct semaphore mutex_t; |
| 46 | |
| 47 | #define mutex_init(lock, type, name) sema_init(lock, 1) |
| 48 | #define mutex_destroy(lock) sema_init(lock, -99) |
| 49 | #define mutex_lock(lock, num) down(lock) |
| 50 | #define mutex_trylock(lock) (down_trylock(lock) ? 0 : 1) |
| 51 | #define mutex_unlock(lock) up(lock) |
| 52 | |
| 53 | #endif /* __XFS_SUPPORT_MUTEX_H__ */ |