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atomic_dec_32_add.c revision 1.3.64.2 
      1  1.3.64.1  martin /*	$NetBSD: atomic_dec_32_add.c,v 1.3.64.2 2020/04/21 19:37:48 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