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atomic_dec_64_add.c revision 1.3.8.1 
      1  1.3.8.1  yamt /*	$NetBSD: atomic_dec_64_add.c,v 1.3.8.1 2008/05/18 12:28:46 yamt 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      1.3    ad #ifdef __HAVE_ATOMIC64_OPS
     37      1.3    ad 
     38      1.2    ad void
     39      1.2    ad atomic_dec_64(volatile uint64_t *addr)
     40      1.2    ad {
     41      1.2    ad 
     42      1.2    ad 	atomic_add_64(addr, -1);
     43      1.2    ad }
     44      1.2    ad 
     45      1.2    ad #undef atomic_dec_64
     46      1.2    ad atomic_op_alias(atomic_dec_64,_atomic_dec_64)
     47      1.2    ad #if defined(_LP64)
     48      1.2    ad #undef atomic_dec_ulong
     49      1.2    ad atomic_op_alias(atomic_dec_ulong,_atomic_dec_64)
     50      1.2    ad __strong_alias(_atomic_dec_ulong,_atomic_dec_64)
     51      1.2    ad #undef atomic_dec_ptr
     52      1.2    ad atomic_op_alias(atomic_dec_ptr,_atomic_dec_64)
     53      1.2    ad __strong_alias(_atomic_dec_ptr,_atomic_dec_64)
     54      1.2    ad #endif /* _LP64 */
     55      1.3    ad 
     56      1.3    ad #endif
     57