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/*
* 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 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 <boost/atomic/detail/config.hpp>
#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_PLATFORM gcc_x86
#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_x86
#elif defined(__GNUC__) && (defined(__POWERPC__) || defined(__PPC__))
#define BOOST_ATOMIC_DETAIL_PLATFORM gcc_ppc
#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_ppc
#elif defined(__GNUC__) && defined(__arm__) && (BOOST_ATOMIC_DETAIL_ARM_ARCH+0) >= 6
#define BOOST_ATOMIC_DETAIL_PLATFORM gcc_arm
#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND gcc_arm
#elif (defined(__GNUC__) || defined(__SUNPRO_CC)) && (defined(__sparcv8plus) || defined(__sparc_v9__))
#define BOOST_ATOMIC_DETAIL_PLATFORM gcc_sparc
#elif defined(__GNUC__) && defined(__alpha__)
#define BOOST_ATOMIC_DETAIL_PLATFORM gcc_alpha
#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
#define BOOST_ATOMIC_DETAIL_PLATFORM msvc_x86
#elif defined(_MSC_VER) && _MSC_VER >= 1700 && (defined(_M_ARM) || defined(_M_ARM64))
#define BOOST_ATOMIC_DETAIL_PLATFORM 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_BACKEND gcc_atomic
#elif defined(BOOST_ATOMIC_DETAIL_PLATFORM)
#define BOOST_ATOMIC_DETAIL_BACKEND BOOST_ATOMIC_DETAIL_PLATFORM
#elif 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_BACKEND gcc_sync
#endif
// OS-based backends
#if !defined(BOOST_ATOMIC_DETAIL_BACKEND)
#if defined(__linux__) && defined(__arm__)
#define BOOST_ATOMIC_DETAIL_BACKEND linux_arm
#elif defined(BOOST_WINDOWS) || defined(_WIN32_CE)
#define BOOST_ATOMIC_DETAIL_BACKEND windows
#endif
#endif // !defined(BOOST_ATOMIC_DETAIL_BACKEND)
#endif // !defined(BOOST_ATOMIC_FORCE_FALLBACK)
#if !defined(BOOST_ATOMIC_DETAIL_BACKEND)
#define BOOST_ATOMIC_DETAIL_BACKEND emulated
#define BOOST_ATOMIC_EMULATED
#endif
#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
#define BOOST_ATOMIC_DETAIL_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_BACKEND).hpp>
#define BOOST_ATOMIC_DETAIL_FP_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_FP_BACKEND).hpp>
#define BOOST_ATOMIC_DETAIL_EXTRA_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_EXTRA_BACKEND).hpp>
#define BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND_HEADER(prefix) <BOOST_JOIN(prefix, BOOST_ATOMIC_DETAIL_EXTRA_FP_BACKEND).hpp>
#endif // BOOST_ATOMIC_DETAIL_PLATFORM_HPP_INCLUDED_
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