/usr/include/libbson-1.0/bson-atomic.h is in libbson-dev 1.3.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /*
* Copyright 2013-2014 MongoDB, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef BSON_ATOMIC_H
#define BSON_ATOMIC_H
#include "bson-config.h"
#include "bson-compat.h"
#include "bson-macros.h"
BSON_BEGIN_DECLS
#if defined(__sun) && defined(__SVR4)
/* Solaris */
# include <atomic.h>
# define bson_atomic_int_add(p,v) atomic_add_32_nv((volatile uint32_t *)p, (v))
# define bson_atomic_int64_add(p,v) atomic_add_64_nv((volatile uint64_t *)p, (v))
#elif defined(_WIN32)
/* MSVC/MinGW */
# define bson_atomic_int_add(p, v) (InterlockedExchangeAdd((volatile LONG *)(p), (LONG)(v)) + (LONG)(v))
# define bson_atomic_int64_add(p, v) (InterlockedExchangeAdd64((volatile LONGLONG *)(p), (LONGLONG)(v)) + (LONGLONG)(v))
#else
# ifdef BSON_HAVE_ATOMIC_32_ADD_AND_FETCH
# define bson_atomic_int_add(p,v) __sync_add_and_fetch((p), (v))
# else
# define __BSON_NEED_ATOMIC_32
# endif
# ifdef BSON_HAVE_ATOMIC_64_ADD_AND_FETCH
# if BSON_GNUC_IS_VERSION(4, 1)
/*
* GCC 4.1 on i386 can generate buggy 64-bit atomic increment.
* So we will work around with a fallback.
*
* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40693
*/
# define __BSON_NEED_ATOMIC_64
# else
# define bson_atomic_int64_add(p, v) __sync_add_and_fetch((volatile int64_t*)(p), (int64_t)(v))
# endif
# else
# define __BSON_NEED_ATOMIC_64
# endif
#endif
#ifdef __BSON_NEED_ATOMIC_32
int32_t bson_atomic_int_add (volatile int32_t *p, int32_t n);
#endif
#ifdef __BSON_NEED_ATOMIC_64
int64_t bson_atomic_int64_add (volatile int64_t *p, int64_t n);
#endif
#if defined(_WIN32)
# define bson_memory_barrier() MemoryBarrier()
#elif defined(__GNUC__)
# if BSON_GNUC_CHECK_VERSION(4, 1)
# define bson_memory_barrier() __sync_synchronize()
# else
# warning "GCC Pre-4.1 discovered, using inline assembly for memory barrier."
# define bson_memory_barrier() __asm__ volatile ("":::"memory")
# endif
#elif defined(__SUNPRO_C)
# include <mbarrier.h>
# define bson_memory_barrier() __machine_rw_barrier()
#elif defined(__xlC__)
# define bson_memory_barrier() __sync()
#else
# define __BSON_NEED_BARRIER 1
# warning "Unknown compiler, using lock for compiler barrier."
void bson_memory_barrier (void);
#endif
BSON_END_DECLS
#endif /* BSON_ATOMIC_H */
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