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ad 2008-04-11 15:23:45 +00:00
parent be7af1fd4f
commit 481e4d16cb
1 changed files with 73 additions and 1 deletions
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74
sys/rump/librump/rumpkern/locks.c
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@ -1,4 +1,37 @@
/* $NetBSD: locks.c,v 1.13 2008/04/01 19:49:31 drochner Exp $ */
/* $NetBSD: locks.c,v 1.14 2008/04/11 15:23:45 ad Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 2007 Antti Kantee. All Rights Reserved.
@ -31,6 +64,7 @@
#include <sys/param.h>
#include <sys/mutex.h>
#include <sys/rwlock.h>
#include <sys/atomic.h>
#include "rump_private.h"
@ -246,3 +280,41 @@ _kernel_unlock(int nlocks, int *countp)
if (countp)
*countp = 1;
}
struct kmutexobj {
kmutex_t mo_lock;
u_int mo_refcnt;
};
kmutex_t *
mutex_obj_alloc(kmutex_type_t type, int ipl)
{
struct kmutexobj *mo;
mo = kmem_alloc(sizeof(*mo), KM_SLEEP);
mutex_init(&mo->mo_lock, type, ipl);
mo->mo_refcnt = 1;
return (kmutex_t *)mo;
}
void
mutex_obj_hold(kmutex_t *lock)
{
struct kmutexobj *mo = (struct kmutexobj *)lock;
atomic_inc_uint(&mo->mo_refcnt);
}
bool
mutex_obj_free(kmutex_t *lock)
{
struct kmutexobj *mo = (struct kmutexobj *)lock;
if (atomic_dec_uint_nv(&mo->mo_refcnt) > 0) {
return false;
}
mutex_destroy(&mo->mo_lock);
kmem_free(mo, sizeof(*mo));
return true;
}