1a109c1cb0
- Add rm_init_flags() and accept extended options only for that variation. - Add a flags space specifically for rm_init_flags(), rather than borrowing the lock_init() flag space. - Define flag RM_RECURSE to use instead of LO_RECURSABLE. - Define flag RM_NOWITNESS to allow an rmlock to be exempt from WITNESS checking; this wasn't possible previously as rm_init() always passed LO_WITNESS when initializing an rmlock's struct lock. - Add RM_SYSINIT_FLAGS(). - Rename embedded mutex in rmlocks to make it more obvious what it is. - Update consumers. - Update man page.
122 lines
4.1 KiB
C
122 lines
4.1 KiB
C
/*-
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* Copyright (c) 2007 Stephan Uphoff <ups@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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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 _SYS_RMLOCK_H_
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#define _SYS_RMLOCK_H_
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#include <sys/mutex.h>
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#include <sys/_lock.h>
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#include <sys/_rmlock.h>
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#ifdef _KERNEL
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/*
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* Flags passed to rm_init(9).
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*/
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#define RM_NOWITNESS 0x00000001
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#define RM_RECURSE 0x00000002
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void rm_init(struct rmlock *rm, const char *name);
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void rm_init_flags(struct rmlock *rm, const char *name, int opts);
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void rm_destroy(struct rmlock *rm);
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int rm_wowned(struct rmlock *rm);
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void rm_sysinit(void *arg);
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void rm_sysinit_flags(void *arg);
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void _rm_wlock_debug(struct rmlock *rm, const char *file, int line);
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void _rm_wunlock_debug(struct rmlock *rm, const char *file, int line);
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void _rm_rlock_debug(struct rmlock *rm, struct rm_priotracker *tracker,
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const char *file, int line);
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void _rm_runlock_debug(struct rmlock *rm, struct rm_priotracker *tracker,
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const char *file, int line);
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void _rm_wlock(struct rmlock *rm);
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void _rm_wunlock(struct rmlock *rm);
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void _rm_rlock(struct rmlock *rm, struct rm_priotracker *tracker);
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void _rm_runlock(struct rmlock *rm, struct rm_priotracker *tracker);
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/*
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* Public interface for lock operations.
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*/
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#ifndef LOCK_DEBUG
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#error LOCK_DEBUG not defined, include <sys/lock.h> before <sys/rmlock.h>
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#endif
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#if LOCK_DEBUG > 0
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#define rm_wlock(rm) _rm_wlock_debug((rm), LOCK_FILE, LOCK_LINE)
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#define rm_wunlock(rm) _rm_wunlock_debug((rm), LOCK_FILE, LOCK_LINE)
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#define rm_rlock(rm,tracker) \
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_rm_rlock_debug((rm),(tracker), LOCK_FILE, LOCK_LINE )
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#define rm_runlock(rm,tracker) \
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_rm_runlock_debug((rm), (tracker), LOCK_FILE, LOCK_LINE )
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#else
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#define rm_wlock(rm) _rm_wlock((rm))
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#define rm_wunlock(rm) _rm_wunlock((rm))
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#define rm_rlock(rm,tracker) _rm_rlock((rm),(tracker))
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#define rm_runlock(rm,tracker) _rm_runlock((rm), (tracker))
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#endif
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struct rm_args {
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struct rmlock *ra_rm;
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const char *ra_desc;
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};
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struct rm_args_flags {
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struct rmlock *ra_rm;
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const char *ra_desc;
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int ra_opts;
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};
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#define RM_SYSINIT(name, rm, desc) \
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static struct rm_args name##_args = { \
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(rm), \
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(desc), \
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}; \
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SYSINIT(name##_rm_sysinit, SI_SUB_LOCK, SI_ORDER_MIDDLE, \
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rm_sysinit, &name##_args); \
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SYSUNINIT(name##_rm_sysuninit, SI_SUB_LOCK, SI_ORDER_MIDDLE, \
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rm_destroy, (rm))
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#define RM_SYSINIT_FLAGS(name, rm, desc, opts) \
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static struct rm_args name##_args = { \
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(rm), \
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(desc), \
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(opts), \
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}; \
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SYSINIT(name##_rm_sysinit, SI_SUB_LOCK, SI_ORDER_MIDDLE, \
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rm_sysinit_flags, &name##_args); \
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SYSUNINIT(name##_rm_sysuninit, SI_SUB_LOCK, SI_ORDER_MIDDLE, \
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rm_destroy, (rm))
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#endif /* _KERNEL */
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#endif /* !_SYS_RMLOCK_H_ */
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