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9f0a21e641
Add the FreeBSD platform code to the OpenZFS repository. As of this commit the source can be compiled and tested on FreeBSD 11 and 12. Subsequent commits are now required to compile on FreeBSD and Linux. Additionally, they must pass the ZFS Test Suite on FreeBSD which is being run by the CI. As of this commit 1230 tests pass on FreeBSD and there are no unexpected failures. Reviewed-by: Sean Eric Fagan <sef@ixsystems.com> Reviewed-by: Jorgen Lundman <lundman@lundman.net> Reviewed-by: Richard Laager <rlaager@wiktel.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Co-authored-by: Ryan Moeller <ryan@iXsystems.com> Signed-off-by: Matt Macy <mmacy@FreeBSD.org> Signed-off-by: Ryan Moeller <ryan@iXsystems.com> Closes #898 Closes #8987
98 lines
3.3 KiB
C
98 lines
3.3 KiB
C
/*
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* Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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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, this list of conditions and the following 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 AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _OPENSOLARIS_SYS_RWLOCK_H_
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#define _OPENSOLARIS_SYS_RWLOCK_H_
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/lock.h>
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#include <sys/sx.h>
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typedef enum {
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RW_DEFAULT = 4 /* kernel default rwlock */
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} krw_type_t;
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typedef enum {
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RW_NONE = 0,
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RW_WRITER = 1,
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RW_READER = 2
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} krw_t;
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typedef struct sx krwlock_t;
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#ifndef OPENSOLARIS_WITNESS
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#define RW_FLAGS (SX_DUPOK | SX_NOWITNESS)
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#else
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#define RW_FLAGS (SX_DUPOK)
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#endif
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#define RW_READ_HELD(x) (rw_read_held((x)))
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#define RW_WRITE_HELD(x) (rw_write_held((x)))
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#define RW_LOCK_HELD(x) (rw_lock_held((x)))
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#define RW_ISWRITER(x) (rw_iswriter(x))
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/* BEGIN CSTYLED */
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#define rw_init(lock, desc, type, arg) do { \
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const char *_name; \
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ASSERT((type) == 0 || (type) == RW_DEFAULT); \
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KASSERT(((lock)->lock_object.lo_flags & LO_ALLMASK) != \
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LO_EXPECTED, ("lock %s already initialized", #lock)); \
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bzero((lock), sizeof(struct sx)); \
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for (_name = #lock; *_name != '\0'; _name++) { \
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if (*_name >= 'a' && *_name <= 'z') \
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break; \
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} \
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if (*_name == '\0') \
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_name = #lock; \
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sx_init_flags((lock), _name, RW_FLAGS); \
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} while (0)
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#define rw_destroy(lock) sx_destroy(lock)
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#define rw_enter(lock, how) do { \
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if ((how) == RW_READER) \
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sx_slock(lock); \
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else /* if ((how) == RW_WRITER) */ \
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sx_xlock(lock); \
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} while (0)
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#define rw_tryenter(lock, how) \
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((how) == RW_READER ? sx_try_slock(lock) : sx_try_xlock(lock))
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#define rw_exit(lock) sx_unlock(lock)
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#define rw_downgrade(lock) sx_downgrade(lock)
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#define rw_tryupgrade(lock) sx_try_upgrade(lock)
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#define rw_read_held(lock) \
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((lock)->sx_lock != SX_LOCK_UNLOCKED && \
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((lock)->sx_lock & SX_LOCK_SHARED))
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#define rw_write_held(lock) sx_xlocked(lock)
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#define rw_lock_held(lock) (rw_read_held(lock) || rw_write_held(lock))
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#define rw_iswriter(lock) sx_xlocked(lock)
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#define rw_owner(lock) sx_xholder(lock)
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/* END CSTYLED */
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#endif /* _OPENSOLARIS_SYS_RWLOCK_H_ */
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