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      1  1.7  martin /*	$NetBSD: atomic_add_64_nv_cas.c,v 1.7 2014/02/22 17:08:30 martin Exp $	*/
      2  1.2      ad 
      3  1.2      ad /*-
      4  1.2      ad  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  1.2      ad  * All rights reserved.
      6  1.2      ad  *
      7  1.2      ad  * This code is derived from software contributed to The NetBSD Foundation
      8  1.2      ad  * by Jason R. Thorpe.
      9  1.2      ad  *
     10  1.2      ad  * Redistribution and use in source and binary forms, with or without
     11  1.2      ad  * modification, are permitted provided that the following conditions
     12  1.2      ad  * are met:
     13  1.2      ad  * 1. Redistributions of source code must retain the above copyright
     14  1.2      ad  *    notice, this list of conditions and the following disclaimer.
     15  1.2      ad  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2      ad  *    notice, this list of conditions and the following disclaimer in the
     17  1.2      ad  *    documentation and/or other materials provided with the distribution.
     18  1.2      ad  *
     19  1.2      ad  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.2      ad  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.2      ad  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.2      ad  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.2      ad  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.2      ad  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.2      ad  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.2      ad  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.2      ad  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.2      ad  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.2      ad  * POSSIBILITY OF SUCH DAMAGE.
     30  1.2      ad  */
     31  1.2      ad 
     32  1.2      ad #include "atomic_op_namespace.h"
     33  1.2      ad 
     34  1.2      ad #include <sys/atomic.h>
     35  1.2      ad 
     36  1.4      ad #ifdef __HAVE_ATOMIC64_OPS
     37  1.4      ad 
     38  1.2      ad uint64_t
     39  1.2      ad atomic_add_64_nv(volatile uint64_t *addr, int64_t val)
     40  1.2      ad {
     41  1.2      ad 	uint64_t old, new;
     42  1.2      ad 
     43  1.2      ad 	do {
     44  1.2      ad 		old = *addr;
     45  1.2      ad 		new = old + val;
     46  1.2      ad 	} while (atomic_cas_64(addr, old, new) != old);
     47  1.2      ad 
     48  1.2      ad 	return (new);
     49  1.2      ad }
     50  1.2      ad 
     51  1.2      ad #undef atomic_add_64_nv
     52  1.2      ad atomic_op_alias(atomic_add_64_nv,_atomic_add_64_nv)
     53  1.7  martin crt_alias(__sync_add_and_fetch_8,_atomic_add_64_nv)
     54  1.2      ad 
     55  1.2      ad #if defined(_LP64)
     56  1.2      ad #undef atomic_add_long_nv
     57  1.2      ad atomic_op_alias(atomic_add_long_nv,_atomic_add_64_nv)
     58  1.2      ad __strong_alias(_atomic_add_long_nv,_atomic_add_64_nv)
     59  1.2      ad 
     60  1.2      ad #undef atomic_add_ptr_nv
     61  1.2      ad atomic_op_alias(atomic_add_ptr_nv,_atomic_add_64_nv)
     62  1.2      ad __strong_alias(_atomic_add_ptr_nv,_atomic_add_64_nv)
     63  1.2      ad #endif /* _LP64 */
     64  1.4      ad 
     65  1.4      ad #endif
     66