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/*- |
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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: src/sys/compat/opensolaris/sys/mutex.h,v 1.3 2007/05/26 21:37:14 pjd Exp $ |
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*/ |
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|
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#ifndef _OPENSOLARIS_SYS_MUTEX_H_ |
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#define _OPENSOLARIS_SYS_MUTEX_H_ |
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|
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#ifdef _KERNEL |
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|
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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_next <sys/mutex.h> |
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#include <sys/sx.h> |
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|
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typedef enum { |
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MUTEX_DEFAULT = 6 /* kernel default mutex */ |
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} kmutex_type_t; |
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|
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#define MUTEX_HELD(x) (mutex_owned(x)) |
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#define MUTEX_NOT_HELD(x) (!mutex_owned(x) || panicstr) |
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|
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typedef struct sx kmutex_t; |
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|
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#ifndef DEBUG |
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#define MUTEX_FLAGS (SX_DUPOK | SX_NOWITNESS) |
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#else |
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#define MUTEX_FLAGS (SX_DUPOK) |
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#endif |
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|
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#define mutex_init(lock, desc, type, arg) do { \ |
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ASSERT((type) == MUTEX_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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sx_init_flags((lock), "zfs:" #lock, MUTEX_FLAGS); \ |
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} while (0) |
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#define mutex_destroy(lock) sx_destroy(lock) |
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#define mutex_enter(lock) sx_xlock(lock) |
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#define mutex_tryenter(lock) sx_try_xlock(lock) |
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#define mutex_exit(lock) sx_xunlock(lock) |
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#define mutex_owned(lock) sx_xlocked(lock) |
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/* TODO: Change to sx_xholder() once it is moved from kern_sx.c to sx.h. */ |
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#define mutex_owner(lock) ((lock)->sx_lock & SX_LOCK_SHARED ? NULL : (struct thread *)SX_OWNER((lock)->sx_lock)) |
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|
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#endif /* _KERNEL */ |
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|
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#endif /* _OPENSOLARIS_SYS_MUTEX_H_ */ |
