ceph/src/boost/boost/atomic/detail/platform.hpp

   1 /*
   2  * Distributed under the Boost Software License, Version 1.0.
   3  * (See accompanying file LICENSE_1_0.txt or copy at
   4  * http://www.boost.org/LICENSE_1_0.txt)
   5  *
   6  * Copyright (c) 2009 Helge Bahmann
   7  * Copyright (c) 2014 Andrey Semashev
   8  */
   9 /*!
  10  * \file   atomic/detail/platform.hpp
  11  *
  12  * This header defines macros for the target platform detection
  13  */
  14
  15 #ifndef BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_
  16 #define BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_
  17
  18 #include <boost/atomic/detail/config.hpp>
  19
  20 #ifdef BOOST_HAS_PRAGMA_ONCE
  21 #pragma once
  22 #endif
  23
  24 #if defined(__GNUC__) && defined(__arm__)
  25
  26 // Newer gcc versions define __ARM_ARCH. Older ones don't, so we have to deduce ARM arch version from a bunch of version-specific macros.
  27 #if defined(__ARM_ARCH)
  28 #define BOOST_ATOMIC_DETAIL_ARM_ARCH __ARM_ARCH
  29 #elif defined(__ARM_ARCH_8A__)
  30 #define BOOST_ATOMIC_DETAIL_ARM_ARCH 8
  31 #elif defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) ||\
  32     defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) ||\
  33     defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7S__)
  34 #define BOOST_ATOMIC_DETAIL_ARM_ARCH 7
  35 #elif defined(__ARM_ARCH_6__)  || defined(__ARM_ARCH_6J__) ||\
  36     defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) ||\
  37     defined(__ARM_ARCH_6ZK__)
  38 #define BOOST_ATOMIC_DETAIL_ARM_ARCH 6
  39 #else
  40 // We are not interested in older versions - they don't support atomic ops
  41 #define BOOST_ATOMIC_DETAIL_ARM_ARCH 0
  42 #endif
  43
  44 #endif // defined(__GNUC__) && defined(__arm__)
  45
  46 #if !defined(BOOST_ATOMIC_FORCE_FALLBACK)
  47
  48 // Determine the target platform.
  49 // The target platform describes the compiler and target architecture. It can be used by more generic backends, such as the ones
  50 // based on compiler intrinsics, to implement specialized operations in a non-generic way.
  51
  52 #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
  53
  54 #define BOOST_ATOMIC_DETAIL_PLATFORM gcc_x86
  55 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_x86
  56
  57 #elif defined(__GNUC__) && (defined(__POWERPC__) || defined(__PPC__))
  58
  59 #define BOOST_ATOMIC_DETAIL_PLATFORM gcc_ppc
  60 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_ppc
  61
  62 #elif defined(__GNUC__) && defined(__arm__) && (BOOST_ATOMIC_DETAIL_ARM_ARCH+0) >= 6
  63
  64 #define BOOST_ATOMIC_DETAIL_PLATFORM gcc_arm
  65 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_arm
  66
  67 #elif (defined(__GNUC__) || defined(__SUNPRO_CC)) && (defined(__sparcv8plus) || defined(__sparc_v9__))
  68
  69 #define BOOST_ATOMIC_DETAIL_PLATFORM gcc_sparc
  70
  71 #elif defined(__GNUC__) && defined(__alpha__)
  72
  73 #define BOOST_ATOMIC_DETAIL_PLATFORM gcc_alpha
  74
  75 #elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
  76
  77 #define BOOST_ATOMIC_DETAIL_PLATFORM msvc_x86
  78
  79 #elif defined(_MSC_VER) && _MSC_VER >= 1700 && (defined(_M_ARM) || defined(_M_ARM64))
  80
  81 #define BOOST_ATOMIC_DETAIL_PLATFORM msvc_arm
  82
  83 #endif
  84
  85 // Compiler-based backends
  86
  87 // IBM XL C++ Compiler has to be checked before GCC/Clang as it pretends to be one but does not support __atomic* intrinsics.
  88 // It does support GCC inline assembler though.
  89 #if !(defined(__ibmxl__) || defined(__IBMCPP__)) &&\
  90     ((defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 407)) ||\
  91         (defined(BOOST_CLANG) && ((__clang_major__ * 100 + __clang_minor__) >= 302))) &&\
  92     (\
  93         (__GCC_ATOMIC_BOOL_LOCK_FREE + 0) == 2 ||\
  94         (__GCC_ATOMIC_CHAR_LOCK_FREE + 0) == 2 ||\
  95         (__GCC_ATOMIC_SHORT_LOCK_FREE + 0) == 2 ||\
  96         (__GCC_ATOMIC_INT_LOCK_FREE + 0) == 2 ||\
  97         (__GCC_ATOMIC_LONG_LOCK_FREE + 0) == 2 ||\
  98         (__GCC_ATOMIC_LLONG_LOCK_FREE + 0) == 2\
  99     )
 100
 101 #define BOOST_ATOMIC_DETAIL_BACKEND gcc_atomic
 102
 103 #elif defined(BOOST_ATOMIC_DETAIL_PLATFORM)
 104
 105 #define BOOST_ATOMIC_DETAIL_BACKEND BOOST_ATOMIC_DETAIL_PLATFORM
 106
 107 #elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 401) &&\
 108     (\
 109         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1) ||\
 110         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2) ||\
 111         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4) ||\
 112         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8) ||\
 113         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16)\
 114     )
 115
 116 #define BOOST_ATOMIC_DETAIL_BACKEND gcc_sync
 117
 118 #endif
 119
 120 // OS-based backends
 121
 122 #if !defined(BOOST_ATOMIC_DETAIL_BACKEND)
 123
 124 #if defined(__linux__) && defined(__arm__)
 125
 126 #define BOOST_ATOMIC_DETAIL_BACKEND linux_arm
 127
 128 #elif defined(BOOST_WINDOWS) || defined(_WIN32_CE)
 129
 130 #define BOOST_ATOMIC_DETAIL_BACKEND windows
 131
 132 #endif
 133
 134 #endif // !defined(BOOST_ATOMIC_DETAIL_BACKEND)
 135
 136 #endif // !defined(BOOST_ATOMIC_FORCE_FALLBACK)
 137
 138 #if !defined(BOOST_ATOMIC_DETAIL_BACKEND)
 139 #define BOOST_ATOMIC_DETAIL_BACKEND emulated
 140 #define BOOST_ATOMIC_EMULATED
 141 #endif
 142
 143 #if !defined(BOOST_ATOMIC_DETAIL_EXTRA_BACKEND)
 144 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND generic
 145 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND_GENERIC
 146 #endif
 147
 148 #define BOOST_ATOMIC_DETAIL_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_BACKEND).hpp>
 149 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_EXTRA_BACKEND).hpp>
 150
 151 #endif // BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_