68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_RWLOCK_H_
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#define _LINUX_RWLOCK_H_
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#include <sys/types.h>
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#include <sys/lock.h>
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#include <sys/rwlock.h>
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typedef struct {
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struct rwlock rw;
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} rwlock_t;
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#define read_lock(_l) rw_rlock(&(_l)->rw)
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#define write_lock(_l) rw_wlock(&(_l)->rw)
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#define read_unlock(_l) rw_runlock(&(_l)->rw)
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#define write_unlock(_l) rw_wunlock(&(_l)->rw)
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#define read_lock_irq(lock) read_lock((lock))
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#define read_unlock_irq(lock) read_unlock((lock))
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#define write_lock_irq(lock) write_lock((lock))
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#define write_unlock_irq(lock) write_unlock((lock))
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#define read_lock_irqsave(lock, flags) \
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do {(flags) = 0; read_lock(lock); } while (0)
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#define write_lock_irqsave(lock, flags) \
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do {(flags) = 0; write_lock(lock); } while (0)
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#define read_unlock_irqrestore(lock, flags) \
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do { read_unlock(lock); } while (0)
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#define write_unlock_irqrestore(lock, flags) \
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do { write_unlock(lock); } while (0)
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static inline void
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rwlock_init(rwlock_t *lock)
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{
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memset(&lock->rw, 0, sizeof(lock->rw));
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rw_init_flags(&lock->rw, "lnxrw", RW_NOWITNESS);
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}
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#endif /* _LINUX_RWLOCK_H_ */
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