18d59ecb2SHans Petter Selasky /*-
28d59ecb2SHans Petter Selasky * Copyright (c) 2010 Isilon Systems, Inc.
38d59ecb2SHans Petter Selasky * Copyright (c) 2010 iX Systems, Inc.
48d59ecb2SHans Petter Selasky * Copyright (c) 2010 Panasas, Inc.
58d59ecb2SHans Petter Selasky * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
68d59ecb2SHans Petter Selasky * All rights reserved.
78d59ecb2SHans Petter Selasky *
88d59ecb2SHans Petter Selasky * Redistribution and use in source and binary forms, with or without
98d59ecb2SHans Petter Selasky * modification, are permitted provided that the following conditions
108d59ecb2SHans Petter Selasky * are met:
118d59ecb2SHans Petter Selasky * 1. Redistributions of source code must retain the above copyright
128d59ecb2SHans Petter Selasky * notice unmodified, this list of conditions, and the following
138d59ecb2SHans Petter Selasky * disclaimer.
148d59ecb2SHans Petter Selasky * 2. Redistributions in binary form must reproduce the above copyright
158d59ecb2SHans Petter Selasky * notice, this list of conditions and the following disclaimer in the
168d59ecb2SHans Petter Selasky * documentation and/or other materials provided with the distribution.
178d59ecb2SHans Petter Selasky *
188d59ecb2SHans Petter Selasky * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
198d59ecb2SHans Petter Selasky * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
208d59ecb2SHans Petter Selasky * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
218d59ecb2SHans Petter Selasky * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
228d59ecb2SHans Petter Selasky * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
238d59ecb2SHans Petter Selasky * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
248d59ecb2SHans Petter Selasky * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
258d59ecb2SHans Petter Selasky * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
268d59ecb2SHans Petter Selasky * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
278d59ecb2SHans Petter Selasky * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
288d59ecb2SHans Petter Selasky */
29307f78f3SVladimir Kondratyev #ifndef _LINUXKPI_LINUX_RWLOCK_H_
30307f78f3SVladimir Kondratyev #define _LINUXKPI_LINUX_RWLOCK_H_
318d59ecb2SHans Petter Selasky
328e7baabcSHans Petter Selasky #include <sys/types.h>
338d59ecb2SHans Petter Selasky #include <sys/lock.h>
348d59ecb2SHans Petter Selasky #include <sys/rwlock.h>
351e3db1deSHans Petter Selasky #include <sys/libkern.h>
368d59ecb2SHans Petter Selasky
378d59ecb2SHans Petter Selasky typedef struct {
388d59ecb2SHans Petter Selasky struct rwlock rw;
398d59ecb2SHans Petter Selasky } rwlock_t;
408d59ecb2SHans Petter Selasky
418d59ecb2SHans Petter Selasky #define read_lock(_l) rw_rlock(&(_l)->rw)
428d59ecb2SHans Petter Selasky #define write_lock(_l) rw_wlock(&(_l)->rw)
438d59ecb2SHans Petter Selasky #define read_unlock(_l) rw_runlock(&(_l)->rw)
448d59ecb2SHans Petter Selasky #define write_unlock(_l) rw_wunlock(&(_l)->rw)
458d59ecb2SHans Petter Selasky #define read_lock_irq(lock) read_lock((lock))
468d59ecb2SHans Petter Selasky #define read_unlock_irq(lock) read_unlock((lock))
478d59ecb2SHans Petter Selasky #define write_lock_irq(lock) write_lock((lock))
488d59ecb2SHans Petter Selasky #define write_unlock_irq(lock) write_unlock((lock))
498d59ecb2SHans Petter Selasky #define read_lock_irqsave(lock, flags) \
508d59ecb2SHans Petter Selasky do {(flags) = 0; read_lock(lock); } while (0)
518d59ecb2SHans Petter Selasky #define write_lock_irqsave(lock, flags) \
528d59ecb2SHans Petter Selasky do {(flags) = 0; write_lock(lock); } while (0)
538d59ecb2SHans Petter Selasky #define read_unlock_irqrestore(lock, flags) \
548d59ecb2SHans Petter Selasky do { read_unlock(lock); } while (0)
558d59ecb2SHans Petter Selasky #define write_unlock_irqrestore(lock, flags) \
568d59ecb2SHans Petter Selasky do { write_unlock(lock); } while (0)
578d59ecb2SHans Petter Selasky
588d59ecb2SHans Petter Selasky static inline void
rwlock_init(rwlock_t * lock)598d59ecb2SHans Petter Selasky rwlock_init(rwlock_t *lock)
608d59ecb2SHans Petter Selasky {
618d59ecb2SHans Petter Selasky
628d59ecb2SHans Petter Selasky memset(&lock->rw, 0, sizeof(lock->rw));
638d59ecb2SHans Petter Selasky rw_init_flags(&lock->rw, "lnxrw", RW_NOWITNESS);
648d59ecb2SHans Petter Selasky }
658d59ecb2SHans Petter Selasky
66307f78f3SVladimir Kondratyev #endif /* _LINUXKPI_LINUX_RWLOCK_H_ */
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