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