63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
|
/* $NetBSD: atomic_inc_64_cas.c,v 1.3 2008/04/28 20:22:52 martin Exp $ */
|
||
|
|
|
||
|
|
/*-
|
||
|
|
* Copyright (c) 2007 The NetBSD Foundation, Inc.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
||
|
|
* by Jason R. Thorpe.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "atomic_op_namespace.h"
|
||
|
|
|
||
|
|
#include <sys/atomic.h>
|
||
|
|
|
||
|
|
#ifdef __HAVE_ATOMIC64_OPS
|
||
|
|
|
||
|
|
void
|
||
|
|
atomic_inc_64(volatile uint64_t *addr)
|
||
|
|
{
|
||
|
|
uint64_t old, new;
|
||
|
|
|
||
|
|
do {
|
||
|
|
old = *addr;
|
||
|
|
new = old + 1;
|
||
|
|
} while (atomic_cas_64(addr, old, new) != old);
|
||
|
|
}
|
||
|
|
|
||
|
|
#undef atomic_inc_64
|
||
|
|
atomic_op_alias(atomic_inc_64,_atomic_inc_64)
|
||
|
|
|
||
|
|
#if defined(_LP64)
|
||
|
|
#undef atomic_inc_ulong
|
||
|
|
atomic_op_alias(atomic_inc_ulong,_atomic_inc_64)
|
||
|
|
__strong_alias(_atomic_inc_ulong,_atomic_inc_64)
|
||
|
|
|
||
|
|
#undef atomic_inc_ptr
|
||
|
|
atomic_op_alias(atomic_inc_ptr,_atomic_inc_64)
|
||
|
|
__strong_alias(_atomic_inc_ptr,_atomic_inc_64)
|
||
|
|
#endif /* _LP64 */
|
||
|
|
|
||
|
|
#endif
|