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) 2014-2018, 2020 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_CORE_ARCH_BACKEND gcc_x86
  55 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_x86
  56
  57 #elif defined(__GNUC__) && defined(__aarch64__)
  58
  59 #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_aarch64
  60 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_aarch64
  61
  62 #elif defined(__GNUC__) && defined(__arm__) && (BOOST_ATOMIC_DETAIL_ARM_ARCH >= 6)
  63
  64 #if (BOOST_ATOMIC_DETAIL_ARM_ARCH >= 8)
  65 #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_aarch32
  66 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_aarch32
  67 #else
  68 #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_arm
  69 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_arm
  70 #endif
  71
  72 #elif defined(__GNUC__) && (defined(__POWERPC__) || defined(__PPC__))
  73
  74 #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_ppc
  75 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_ppc
  76
  77 #elif (defined(__GNUC__) || defined(__SUNPRO_CC)) && (defined(__sparcv8plus) || defined(__sparc_v9__))
  78
  79 #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_sparc
  80
  81 #elif defined(__GNUC__) && defined(__alpha__)
  82
  83 #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_alpha
  84
  85 #elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
  86
  87 #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND msvc_x86
  88
  89 #elif defined(_MSC_VER) && _MSC_VER >= 1700 && (defined(_M_ARM) || defined(_M_ARM64))
  90
  91 #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND msvc_arm
  92
  93 #endif
  94
  95 // Compiler-based backends
  96
  97 // IBM XL C++ Compiler has to be checked before GCC/Clang as it pretends to be one but does not support __atomic* intrinsics.
  98 // It does support GCC inline assembler though.
  99 #if !(defined(__ibmxl__) || defined(__IBMCPP__)) &&\
 100     ((defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 407)) ||\
 101         (defined(BOOST_CLANG) && ((__clang_major__ * 100 + __clang_minor__) >= 302))) &&\
 102     (\
 103         (__GCC_ATOMIC_BOOL_LOCK_FREE + 0) == 2 ||\
 104         (__GCC_ATOMIC_CHAR_LOCK_FREE + 0) == 2 ||\
 105         (__GCC_ATOMIC_SHORT_LOCK_FREE + 0) == 2 ||\
 106         (__GCC_ATOMIC_INT_LOCK_FREE + 0) == 2 ||\
 107         (__GCC_ATOMIC_LONG_LOCK_FREE + 0) == 2 ||\
 108         (__GCC_ATOMIC_LLONG_LOCK_FREE + 0) == 2\
 109     )
 110
 111 #define BOOST_ATOMIC_DETAIL_CORE_BACKEND gcc_atomic
 112
 113 // GCC __sync* instrinsics backend is less efficient than asm-based backends, so use it only when nothing better is available.
 114 #elif !defined(BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND) &&\
 115     defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 401) &&\
 116     (\
 117         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1) ||\
 118         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2) ||\
 119         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4) ||\
 120         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8) ||\
 121         defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16)\
 122     )
 123
 124 #define BOOST_ATOMIC_DETAIL_CORE_BACKEND gcc_sync
 125
 126 #endif
 127
 128 // OS-based backends
 129
 130 #if !defined(BOOST_ATOMIC_DETAIL_CORE_BACKEND) && !defined(BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND)
 131
 132 #if defined(__linux__) && defined(__arm__)
 133
 134 #define BOOST_ATOMIC_DETAIL_CORE_BACKEND linux_arm
 135
 136 #elif defined(BOOST_WINDOWS) || defined(_WIN32_CE)
 137
 138 #define BOOST_ATOMIC_DETAIL_CORE_BACKEND windows
 139
 140 #endif
 141
 142 #endif // !defined(BOOST_ATOMIC_DETAIL_CORE_BACKEND)
 143
 144 // Waiting and notifying operations backends
 145 #if defined(BOOST_WINDOWS)
 146
 147 #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND windows
 148
 149 #else // defined(BOOST_WINDOWS)
 150
 151 #include <boost/atomic/detail/futex.hpp>
 152
 153 #if defined(BOOST_ATOMIC_DETAIL_HAS_FUTEX)
 154 #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND futex
 155 #elif defined(__FreeBSD__)
 156 #include <sys/param.h>
 157 // FreeBSD prior to 7.0 had _umtx_op with a different signature
 158 #if defined(__FreeBSD_version) && __FreeBSD_version >= 700000
 159 #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND freebsd_umtx
 160 #endif // defined(__FreeBSD_version) && __FreeBSD_version >= 700000
 161 #elif defined(__DragonFly__)
 162 #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND dragonfly_umtx
 163 #endif
 164
 165 #endif // defined(BOOST_WINDOWS)
 166
 167 #endif // !defined(BOOST_ATOMIC_FORCE_FALLBACK)
 168
 169 #if !defined(BOOST_ATOMIC_DETAIL_FP_BACKEND)
 170 #define BOOST_ATOMIC_DETAIL_FP_BACKEND generic
 171 #define BOOST_ATOMIC_DETAIL_FP_BACKEND_GENERIC
 172 #endif
 173
 174 #if !defined(BOOST_ATOMIC_DETAIL_EXTRA_BACKEND)
 175 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND generic
 176 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND_GENERIC
 177 #endif
 178
 179 #if !defined(BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND)
 180 #define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND generic
 181 #define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND_GENERIC
 182 #endif
 183
 184 #if !defined(BOOST_ATOMIC_DETAIL_WAIT_BACKEND)
 185 #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND generic
 186 #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND_GENERIC
 187 #endif
 188
 189 #if defined(BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND)
 190 #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND).hpp>
 191 #endif
 192 #if defined(BOOST_ATOMIC_DETAIL_CORE_BACKEND)
 193 #define BOOST_ATOMIC_DETAIL_CORE_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_CORE_BACKEND).hpp>
 194 #endif
 195 #define BOOST_ATOMIC_DETAIL_FP_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_FP_BACKEND).hpp>
 196 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_EXTRA_BACKEND).hpp>
 197 #define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND).hpp>
 198 #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_WAIT_BACKEND).hpp>
 199
 200 #endif // BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_