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/vendor/gc/libatomic_ops-1.2/src/atomic_ops/sysdeps/int_atomic_load_store.h

http://github.com/feyeleanor/RubyGoLightly
C++ Header | 46 lines | 12 code | 7 blank | 27 comment | 0 complexity | 35f9f0a77a3da436573a42a60d56d037 MD5 | raw file
 1/*
 2 * Copyright (c) 2003 by Hewlett-Packard Company.  All rights reserved.
 3 * 
 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
 5 * of this software and associated documentation files (the "Software"), to deal
 6 * in the Software without restriction, including without limitation the rights
 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 8 * copies of the Software, and to permit persons to whom the Software is
 9 * furnished to do so, subject to the following conditions:
10 * 
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 * 
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE. 
21 */ 
22
23/*
24 * Definitions for architecturs on which loads and stores of unsigned int are
25 * atomic for all legal alignments.
26 */
27
28AO_INLINE unsigned int
29AO_int_load(volatile unsigned int *addr)
30{
31  /* Cast away the volatile for architectures like IA64 where	*/
32  /* volatile adds barrier semantics.				*/
33  return (*(unsigned int *)addr);
34}
35
36#define AO_HAVE_int_load
37
38AO_INLINE void
39AO_int_store(volatile unsigned int *addr, unsigned int new_val)
40{
41  (*(unsigned int *)addr) = new_val;
42}
43
44#define AO_HAVE_int_store
45
46