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/* $OpenBSD: kern_mutex.c,v 1.1 2017/04/20 13:57:30 visa Exp $ */
/*
* Copyright (c) 2017 Visa Hankala
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mutex.h>
#include <sys/witness.h>
void
_mtx_init_flags(struct mutex *m, int ipl, const char *name, int flags,
struct lock_type *type)
{
struct lock_object *lo = MUTEX_LOCK_OBJECT(m);
lo->lo_flags = MTX_LO_FLAGS(flags);
if (name != NULL)
lo->lo_name = name;
else
lo->lo_name = type->lt_name;
WITNESS_INIT(lo, type);
_mtx_init(m, ipl);
}
void
_mtx_enter(struct mutex *m, const char *file, int line)
{
struct lock_object *lo = MUTEX_LOCK_OBJECT(m);
WITNESS_CHECKORDER(lo, LOP_EXCLUSIVE | LOP_NEWORDER, file, line, NULL);
__mtx_enter(m);
WITNESS_LOCK(lo, LOP_EXCLUSIVE, file, line);
}
int
_mtx_enter_try(struct mutex *m, const char *file, int line)
{
struct lock_object *lo = MUTEX_LOCK_OBJECT(m);
if (__mtx_enter_try(m)) {
WITNESS_LOCK(lo, LOP_EXCLUSIVE, file, line);
return 1;
}
return 0;
}
void
_mtx_leave(struct mutex *m, const char *file, int line)
{
struct lock_object *lo = MUTEX_LOCK_OBJECT(m);
WITNESS_UNLOCK(lo, LOP_EXCLUSIVE, file, line);
__mtx_leave(m);
}
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