2 * Copyright (c) 2004 Hewlett-Packard Development Company, L.P.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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
23 /* Definitions for architectures on which loads and stores of unsigned */
24 /* int are atomic for all legal alignments. */
26 AO_INLINE unsigned int
27 AO_int_load(const volatile unsigned int *addr)
29 assert(((size_t)addr & (sizeof(unsigned int) - 1)) == 0);
30 /* Cast away the volatile for architectures like IA64 where */
31 /* volatile adds barrier semantics. */
32 return (*(unsigned int *)addr);
34 #define AO_HAVE_int_load
37 AO_int_store(volatile unsigned int *addr, unsigned int new_val)
39 assert(((size_t)addr & (sizeof(unsigned int) - 1)) == 0);
40 (*(unsigned int *)addr) = new_val;
42 #define AO_HAVE_int_store