2 * Copyright (c) 2003 by Hewlett-Packard Company. All rights reserved.
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
24 * These are common definitions for architectures that provide processor
25 * ordered memory operations except that a later read may pass an
26 * earlier write. Real x86 implementations seem to be in this category,
27 * except apparently for some IDT WinChips, which we ignore.
33 AO_compiler_barrier();
35 #define AO_HAVE_nop_read
39 AO_load_read(const volatile AO_t *addr)
41 AO_t result = AO_load(addr);
42 AO_compiler_barrier();
45 # define AO_HAVE_load_read
47 # define AO_load_acquire(addr) AO_load_read(addr)
48 # define AO_HAVE_load_acquire
49 #endif /* AO_HAVE_load */
51 #ifdef AO_HAVE_char_load
53 AO_char_load_read(const volatile unsigned char *addr)
55 AO_t result = AO_char_load(addr);
56 AO_compiler_barrier();
59 # define AO_HAVE_char_load_read
61 # define AO_char_load_acquire(addr) AO_char_load_read(addr)
62 # define AO_HAVE_char_load_acquire
63 #endif /* AO_HAVE_char_load */
65 #ifdef AO_HAVE_short_load
67 AO_short_load_read(const volatile unsigned short *addr)
69 AO_t result = AO_short_load(addr);
70 AO_compiler_barrier();
73 # define AO_HAVE_short_load_read
75 # define AO_short_load_acquire(addr) AO_short_load_read(addr)
76 # define AO_HAVE_short_load_acquire
77 #endif /* AO_HAVE_short_load */
79 #ifdef AO_HAVE_int_load
81 AO_int_load_read(const volatile unsigned int *addr)
83 AO_t result = AO_int_load(addr);
84 AO_compiler_barrier();
87 # define AO_HAVE_int_load_read
89 # define AO_int_load_acquire(addr) AO_int_load_read(addr)
90 # define AO_HAVE_int_load_acquire
91 #endif /* AO_HAVE_int_load */