b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/* $NetBSD: atomic_add_64_nv_cas.c,v 1.5 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
|
|
|
|
uint64_t
|
|
atomic_add_64_nv(volatile uint64_t *addr, int64_t val)
|
|
{
|
|
uint64_t old, new;
|
|
|
|
do {
|
|
old = *addr;
|
|
new = old + val;
|
|
} while (atomic_cas_64(addr, old, new) != old);
|
|
|
|
return (new);
|
|
}
|
|
|
|
#undef atomic_add_64_nv
|
|
atomic_op_alias(atomic_add_64_nv,_atomic_add_64_nv)
|
|
|
|
#if defined(_LP64)
|
|
#undef atomic_add_long_nv
|
|
atomic_op_alias(atomic_add_long_nv,_atomic_add_64_nv)
|
|
__strong_alias(_atomic_add_long_nv,_atomic_add_64_nv)
|
|
|
|
#undef atomic_add_ptr_nv
|
|
atomic_op_alias(atomic_add_ptr_nv,_atomic_add_64_nv)
|
|
__strong_alias(_atomic_add_ptr_nv,_atomic_add_64_nv)
|
|
#endif /* _LP64 */
|
|
|
|
#endif
|