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atomic_dec_32_add.c revision 1.3 
      1  1.3  martin /*	$NetBSD: atomic_dec_32_add.c,v 1.3 2008/04/28 20:22:52 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  1.2      ad void
     37  1.2      ad atomic_dec_32(volatile uint32_t *addr)
     38  1.2      ad {
     39  1.2      ad 
     40  1.2      ad 	atomic_add_32(addr, -1);
     41  1.2      ad }
     42  1.2      ad 
     43  1.2      ad #undef atomic_dec_32
     44  1.2      ad atomic_op_alias(atomic_dec_32,_atomic_dec_32)
     45  1.2      ad #undef atomic_dec_uint
     46  1.2      ad atomic_op_alias(atomic_dec_uint,_atomic_dec_32)
     47  1.2      ad __strong_alias(_atomic_dec_uint,_atomic_dec_32)
     48  1.2      ad #if !defined(_LP64)
     49  1.2      ad #undef atomic_dec_ulong
     50  1.2      ad atomic_op_alias(atomic_dec_ulong,_atomic_dec_32)
     51  1.2      ad __strong_alias(_atomic_dec_ulong,_atomic_dec_32)
     52  1.2      ad #undef atomic_dec_ptr
     53  1.2      ad atomic_op_alias(atomic_dec_ptr,_atomic_dec_32)
     54  1.2      ad __strong_alias(_atomic_dec_ptr,_atomic_dec_32)
     55  1.2      ad #endif /* _LP64 */
     56