/* * Distributed under the Boost Software License, Version 1.0. * (See accompanying file LICENSE_1_0.txt or copy at * http://www.boost.org/LICENSE_1_0.txt) * * Copyright (c) 2009 Helge Bahmann * Copyright (c) 2014-2018, 2020 Andrey Semashev */ /*! * \file atomic/detail/platform.hpp * * This header defines macros for the target platform detection */ #ifndef BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_ #define BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_ #include #ifdef BOOST_HAS_PRAGMA_ONCE #pragma once #endif #if defined(__GNUC__) && defined(__arm__) // 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. #if defined(__ARM_ARCH) #define BOOST_ATOMIC_DETAIL_ARM_ARCH __ARM_ARCH #elif defined(__ARM_ARCH_8A__) #define BOOST_ATOMIC_DETAIL_ARM_ARCH 8 #elif defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) ||\ defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) ||\ defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7S__) #define BOOST_ATOMIC_DETAIL_ARM_ARCH 7 #elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) ||\ defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) ||\ defined(__ARM_ARCH_6ZK__) #define BOOST_ATOMIC_DETAIL_ARM_ARCH 6 #else // We are not interested in older versions - they don't support atomic ops #define BOOST_ATOMIC_DETAIL_ARM_ARCH 0 #endif #endif // defined(__GNUC__) && defined(__arm__) #if !defined(BOOST_ATOMIC_FORCE_FALLBACK) // Determine the target platform. // The target platform describes the compiler and target architecture. It can be used by more generic backends, such as the ones // based on compiler intrinsics, to implement specialized operations in a non-generic way. #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_x86 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_x86 #elif defined(__GNUC__) && defined(__aarch64__) #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_aarch64 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_aarch64 #elif defined(__GNUC__) && defined(__arm__) && (BOOST_ATOMIC_DETAIL_ARM_ARCH >= 6) #if (BOOST_ATOMIC_DETAIL_ARM_ARCH >= 8) #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_aarch32 #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_aarch32 #else #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_arm #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_arm #endif #elif defined(__GNUC__) && (defined(__POWERPC__) || defined(__PPC__)) #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_ppc #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_ppc #elif (defined(__GNUC__) || defined(__SUNPRO_CC)) && (defined(__sparcv8plus) || defined(__sparc_v9__)) #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_sparc #elif defined(__GNUC__) && defined(__alpha__) #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_alpha #elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64)) #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND msvc_x86 #elif defined(_MSC_VER) && _MSC_VER >= 1700 && (defined(_M_ARM) || defined(_M_ARM64)) #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND msvc_arm #endif // Compiler-based backends // IBM XL C++ Compiler has to be checked before GCC/Clang as it pretends to be one but does not support __atomic* intrinsics. // It does support GCC inline assembler though. #if !(defined(__ibmxl__) || defined(__IBMCPP__)) &&\ ((defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 407)) ||\ (defined(BOOST_CLANG) && ((__clang_major__ * 100 + __clang_minor__) >= 302))) &&\ (\ (__GCC_ATOMIC_BOOL_LOCK_FREE + 0) == 2 ||\ (__GCC_ATOMIC_CHAR_LOCK_FREE + 0) == 2 ||\ (__GCC_ATOMIC_SHORT_LOCK_FREE + 0) == 2 ||\ (__GCC_ATOMIC_INT_LOCK_FREE + 0) == 2 ||\ (__GCC_ATOMIC_LONG_LOCK_FREE + 0) == 2 ||\ (__GCC_ATOMIC_LLONG_LOCK_FREE + 0) == 2\ ) #define BOOST_ATOMIC_DETAIL_CORE_BACKEND gcc_atomic // GCC __sync* instrinsics backend is less efficient than asm-based backends, so use it only when nothing better is available. #elif !defined(BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND) &&\ defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 401) &&\ (\ defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1) ||\ defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2) ||\ defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4) ||\ defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8) ||\ defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16)\ ) #define BOOST_ATOMIC_DETAIL_CORE_BACKEND gcc_sync #endif // OS-based backends #if !defined(BOOST_ATOMIC_DETAIL_CORE_BACKEND) && !defined(BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND) #if defined(__linux__) && defined(__arm__) #define BOOST_ATOMIC_DETAIL_CORE_BACKEND linux_arm #elif defined(BOOST_WINDOWS) || defined(_WIN32_CE) #define BOOST_ATOMIC_DETAIL_CORE_BACKEND windows #endif #endif // !defined(BOOST_ATOMIC_DETAIL_CORE_BACKEND) // Waiting and notifying operations backends #if defined(BOOST_WINDOWS) #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND windows #else // defined(BOOST_WINDOWS) #include #if defined(BOOST_ATOMIC_DETAIL_HAS_FUTEX) #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND futex #elif defined(__FreeBSD__) #include // FreeBSD prior to 7.0 had _umtx_op with a different signature #if defined(__FreeBSD_version) && __FreeBSD_version >= 700000 #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND freebsd_umtx #endif // defined(__FreeBSD_version) && __FreeBSD_version >= 700000 #elif defined(__DragonFly__) #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND dragonfly_umtx #endif #endif // defined(BOOST_WINDOWS) #endif // !defined(BOOST_ATOMIC_FORCE_FALLBACK) #if !defined(BOOST_ATOMIC_DETAIL_FP_BACKEND) #define BOOST_ATOMIC_DETAIL_FP_BACKEND generic #define BOOST_ATOMIC_DETAIL_FP_BACKEND_GENERIC #endif #if !defined(BOOST_ATOMIC_DETAIL_EXTRA_BACKEND) #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND generic #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND_GENERIC #endif #if !defined(BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND) #define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND generic #define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND_GENERIC #endif #if !defined(BOOST_ATOMIC_DETAIL_WAIT_BACKEND) #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND generic #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND_GENERIC #endif #if defined(BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND) #define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND_HEADER(prefix) #endif #if defined(BOOST_ATOMIC_DETAIL_CORE_BACKEND) #define BOOST_ATOMIC_DETAIL_CORE_BACKEND_HEADER(prefix) #endif #define BOOST_ATOMIC_DETAIL_FP_BACKEND_HEADER(prefix) #define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND_HEADER(prefix) #define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND_HEADER(prefix) #define BOOST_ATOMIC_DETAIL_WAIT_BACKEND_HEADER(prefix) #endif // BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_