/usr/include/atomic_ops/sysdeps/int_acquire_release_volatile.h is in libatomic-ops-dev 7.2~alpha5+cvs20101124-1ubuntu1.
This file is owned by root:root, with mode 0o644.
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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 | /*
* Copyright (c) 2003-2004 Hewlett-Packard Development Company, L.P.
*
* 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.
*/
/*
* This file adds definitions appropriate for environments in which an unsigned
* int volatile load has acquire semantics, and an unsigned short volatile
* store has release semantics. This is true with the standard Itanium ABI.
*/
#if !defined(AO_GCC_BARRIER)
# if defined(__GNUC__)
# define AO_GCC_BARRIER() AO_compiler_barrier()
# else
# define AO_GCC_BARRIER()
# endif
#endif
AO_INLINE unsigned int
AO_int_load_acquire(const volatile unsigned int *p)
{
unsigned int result = *p;
/* A normal volatile load generates an ld.acq */
AO_GCC_BARRIER();
return result;
}
#define AO_HAVE_int_load_acquire
AO_INLINE void
AO_int_store_release(volatile unsigned int *p, unsigned int val)
{
AO_GCC_BARRIER();
/* A normal volatile store generates an st.rel */
*p = val;
}
#define AO_HAVE_int_store_release
|