210 lines
7.7 KiB
C++
210 lines
7.7 KiB
C++
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/*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* Copyright (c) 2009 Helge Bahmann
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* Copyright (c) 2014-2018, 2020 Andrey Semashev
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*/
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/*!
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* \file atomic/detail/platform.hpp
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*
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* This header defines macros for the target platform detection
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*/
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#ifndef BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_
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#define BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_
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#include <boost/atomic/detail/config.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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#if defined(__GNUC__) && defined(__arm__)
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// 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.
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#if defined(__ARM_ARCH)
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#define BOOST_ATOMIC_DETAIL_ARM_ARCH __ARM_ARCH
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#elif defined(__ARM_ARCH_8A__)
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#define BOOST_ATOMIC_DETAIL_ARM_ARCH 8
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#elif defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) ||\
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defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) ||\
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defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7S__)
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#define BOOST_ATOMIC_DETAIL_ARM_ARCH 7
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#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) ||\
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defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) ||\
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defined(__ARM_ARCH_6ZK__)
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#define BOOST_ATOMIC_DETAIL_ARM_ARCH 6
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#else
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// We are not interested in older versions - they don't support atomic ops
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#define BOOST_ATOMIC_DETAIL_ARM_ARCH 0
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#endif
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#endif // defined(__GNUC__) && defined(__arm__)
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#if !defined(BOOST_ATOMIC_FORCE_FALLBACK)
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// Determine the target platform.
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// The target platform describes the compiler and target architecture. It can be used by more generic backends, such as the ones
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// based on compiler intrinsics, to implement specialized operations in a non-generic way.
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#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_x86
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#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_x86
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#elif defined(__GNUC__) && defined(__aarch64__)
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_aarch64
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#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_aarch64
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#elif defined(__GNUC__) && defined(__arm__) && (BOOST_ATOMIC_DETAIL_ARM_ARCH >= 6)
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#if (BOOST_ATOMIC_DETAIL_ARM_ARCH >= 8)
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_aarch32
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#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_aarch32
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#else
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_arm
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#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_arm
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#endif
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#elif defined(__GNUC__) && (defined(__POWERPC__) || defined(__PPC__))
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_ppc
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#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_ppc
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#elif (defined(__GNUC__) || defined(__SUNPRO_CC)) && (defined(__sparcv8plus) || defined(__sparc_v9__))
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_sparc
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#elif defined(__GNUC__) && defined(__alpha__)
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND gcc_alpha
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#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND msvc_x86
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#elif defined(_MSC_VER) && _MSC_VER >= 1700 && (defined(_M_ARM) || defined(_M_ARM64))
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND msvc_arm
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#endif
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// Compiler-based backends
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// IBM XL C++ Compiler has to be checked before GCC/Clang as it pretends to be one but does not support __atomic* intrinsics.
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// It does support GCC inline assembler though.
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#if !(defined(__ibmxl__) || defined(__IBMCPP__)) &&\
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((defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 407)) ||\
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(defined(BOOST_CLANG) && ((__clang_major__ * 100 + __clang_minor__) >= 302))) &&\
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(\
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(__GCC_ATOMIC_BOOL_LOCK_FREE == 2) ||\
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(__GCC_ATOMIC_CHAR_LOCK_FREE == 2) ||\
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(__GCC_ATOMIC_SHORT_LOCK_FREE == 2) ||\
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(__GCC_ATOMIC_INT_LOCK_FREE == 2) ||\
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(__GCC_ATOMIC_LONG_LOCK_FREE == 2) ||\
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(__GCC_ATOMIC_LLONG_LOCK_FREE == 2)\
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)
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#define BOOST_ATOMIC_DETAIL_CORE_BACKEND gcc_atomic
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// GCC __sync* instrinsics backend is less efficient than asm-based backends, so use it only when nothing better is available.
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#elif !defined(BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND) &&\
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defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 401) &&\
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(\
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defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1) ||\
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defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2) ||\
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defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4) ||\
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defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8) ||\
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defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16)\
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)
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#define BOOST_ATOMIC_DETAIL_CORE_BACKEND gcc_sync
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#endif
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// OS-based backends
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#if !defined(BOOST_ATOMIC_DETAIL_CORE_BACKEND) && !defined(BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND)
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#if defined(__linux__) && defined(__arm__)
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#define BOOST_ATOMIC_DETAIL_CORE_BACKEND linux_arm
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#elif defined(BOOST_WINDOWS) || defined(_WIN32_CE)
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#define BOOST_ATOMIC_DETAIL_CORE_BACKEND windows
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#endif
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#endif // !defined(BOOST_ATOMIC_DETAIL_CORE_BACKEND)
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// Waiting and notifying operations backends
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#if defined(BOOST_WINDOWS)
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#define BOOST_ATOMIC_DETAIL_WAIT_BACKEND windows
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#else // defined(BOOST_WINDOWS)
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#include <boost/atomic/detail/futex.hpp>
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#if defined(BOOST_ATOMIC_DETAIL_HAS_FUTEX)
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#define BOOST_ATOMIC_DETAIL_WAIT_BACKEND futex
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#elif defined(__APPLE__)
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#if !defined(BOOST_ATOMIC_NO_DARWIN_ULOCK) && (\
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(defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101200) || \
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(defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 100000) || \
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(defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 100000) || \
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(defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 30000))
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// Darwin 16+ supports ulock API
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#define BOOST_ATOMIC_DETAIL_WAIT_BACKEND darwin_ulock
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#endif // __ENVIRONMENT_*_VERSION_MIN_REQUIRED__
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#elif defined(__FreeBSD__)
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#include <sys/param.h>
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// FreeBSD prior to 7.0 had _umtx_op with a different signature
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#if defined(__FreeBSD_version) && __FreeBSD_version >= 700000
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#define BOOST_ATOMIC_DETAIL_WAIT_BACKEND freebsd_umtx
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#endif // defined(__FreeBSD_version) && __FreeBSD_version >= 700000
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#elif defined(__DragonFly__)
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#define BOOST_ATOMIC_DETAIL_WAIT_BACKEND dragonfly_umtx
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#endif
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#endif // defined(BOOST_WINDOWS)
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#endif // !defined(BOOST_ATOMIC_FORCE_FALLBACK)
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#if !defined(BOOST_ATOMIC_DETAIL_FP_BACKEND)
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#define BOOST_ATOMIC_DETAIL_FP_BACKEND generic
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#define BOOST_ATOMIC_DETAIL_FP_BACKEND_GENERIC
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_EXTRA_BACKEND)
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#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND generic
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#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND_GENERIC
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND)
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#define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND generic
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#define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND_GENERIC
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_WAIT_BACKEND)
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#define BOOST_ATOMIC_DETAIL_WAIT_BACKEND generic
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#define BOOST_ATOMIC_DETAIL_WAIT_BACKEND_GENERIC
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#endif
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#if defined(BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND)
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#define BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_CORE_ARCH_BACKEND).hpp>
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#endif
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#if defined(BOOST_ATOMIC_DETAIL_CORE_BACKEND)
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#define BOOST_ATOMIC_DETAIL_CORE_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_CORE_BACKEND).hpp>
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#endif
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#define BOOST_ATOMIC_DETAIL_FP_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_FP_BACKEND).hpp>
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#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_EXTRA_BACKEND).hpp>
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#define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND).hpp>
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#define BOOST_ATOMIC_DETAIL_WAIT_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_WAIT_BACKEND).hpp>
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#endif // BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_
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