/usr/include/atomic_ops/sysdeps/read_ordered.h is in libatomic-ops-dev 7.2~alpha5+cvs20101124-1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | /*
* Copyright (c) 2003 by Hewlett-Packard Company. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* These are common definitions for architectures that provide processor
* ordered memory operations except that a later read may pass an
* earlier write. Real x86 implementations seem to be in this category,
* except apparently for some IDT WinChips, which we ignore.
*/
AO_INLINE void
AO_nop_read(void)
{
AO_compiler_barrier();
}
#define AO_HAVE_NOP_READ
#ifdef AO_HAVE_load
AO_INLINE AO_t
AO_load_read(const volatile AO_t *addr)
{
AO_t result = AO_load(addr);
AO_compiler_barrier();
return result;
}
#define AO_HAVE_load_read
#define AO_load_acquire(addr) AO_load_read(addr)
#define AO_HAVE_load_acquire
#endif /* AO_HAVE_load */
#ifdef AO_HAVE_char_load
AO_INLINE AO_t
AO_char_load_read(const volatile unsigned char *addr)
{
AO_t result = AO_char_load(addr);
AO_compiler_barrier();
return result;
}
#define AO_HAVE_char_load_read
#define AO_char_load_acquire(addr) AO_char_load_read(addr)
#define AO_HAVE_char_load_acquire
#endif /* AO_HAVE_char_load */
#ifdef AO_HAVE_short_load
AO_INLINE AO_t
AO_short_load_read(const volatile unsigned short *addr)
{
AO_t result = AO_short_load(addr);
AO_compiler_barrier();
return result;
}
#define AO_HAVE_short_load_read
#define AO_short_load_acquire(addr) AO_short_load_read(addr)
#define AO_HAVE_short_load_acquire
#endif /* AO_HAVE_short_load */
#ifdef AO_HAVE_int_load
AO_INLINE AO_t
AO_int_load_read(const volatile unsigned int *addr)
{
AO_t result = AO_int_load(addr);
AO_compiler_barrier();
return result;
}
#define AO_HAVE_int_load_read
#define AO_int_load_acquire(addr) AO_int_load_read(addr)
#define AO_HAVE_int_load_acquire
#endif /* AO_HAVE_int_load */
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