1/* $NetBSD: atomic_and_32_nv_cas.c,v 1.4 2008/04/28 20:22:52 martin Exp $ */ 2 3/*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "atomic_op_namespace.h" 33 34#include <sys/atomic.h> 35 36uint32_t 37atomic_and_32_nv(volatile uint32_t *addr, uint32_t val) 38{ 39 uint32_t old, new; 40 41 do { 42 old = *addr; 43 new = old & val; 44 } while (atomic_cas_32(addr, old, new) != old); 45 46 return (new); 47} 48 49#undef atomic_and_32_nv 50atomic_op_alias(atomic_and_32_nv,_atomic_and_32_nv) 51#undef atomic_and_uint_nv 52atomic_op_alias(atomic_and_uint_nv,_atomic_and_32_nv) 53__strong_alias(_atomic_and_uint_nv,_atomic_and_32_nv) 54#if !defined(_LP64) 55#undef atomic_and_ulong_nv 56atomic_op_alias(atomic_and_ulong_nv,_atomic_and_32_nv) 57__strong_alias(_atomic_and_ulong_nv,_atomic_and_32_nv) 58#endif /* _LP64 */ 59