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__ */ 54