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