193 lines
8.5 KiB
C++
193 lines
8.5 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) 2012 Hartmut Kaiser
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* Copyright (c) 2014-2018, 2020-2021 Andrey Semashev
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*/
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/*!
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* \file atomic/detail/config.hpp
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*
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* This header defines configuraion macros for Boost.Atomic
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*/
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#ifndef BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_
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#define BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_
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#include <boost/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(__CUDACC__)
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// nvcc does not support alternatives ("q,m") in asm statement constraints
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#define BOOST_ATOMIC_DETAIL_NO_ASM_CONSTRAINT_ALTERNATIVES
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// nvcc does not support condition code register ("cc") clobber in asm statements
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#define BOOST_ATOMIC_DETAIL_NO_ASM_CLOBBER_CC
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_NO_ASM_CLOBBER_CC)
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#define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC "cc"
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#define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "cc",
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#else
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#define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC
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#define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA
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#endif
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#if (defined(__i386__) || defined(__x86_64__)) && (defined(__clang__) || (defined(BOOST_GCC) && BOOST_GCC < 40500) || defined(__SUNPRO_CC))
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// This macro indicates that the compiler does not support allocating eax:edx or rax:rdx register pairs ("A") in asm blocks
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#define BOOST_ATOMIC_DETAIL_X86_NO_ASM_AX_DX_PAIRS
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#endif
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#if defined(__i386__) && (defined(__PIC__) || defined(__PIE__)) && !(defined(__clang__) || (defined(BOOST_GCC) && BOOST_GCC >= 50100))
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// This macro indicates that asm blocks should preserve ebx value unchanged. Some compilers are able to maintain ebx themselves
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// around the asm blocks. For those compilers we don't need to save/restore ebx in asm blocks.
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#define BOOST_ATOMIC_DETAIL_X86_ASM_PRESERVE_EBX
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#endif
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#if defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
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#if !(defined(BOOST_LIBSTDCXX11) && BOOST_LIBSTDCXX_VERSION >= 40700) /* libstdc++ from gcc >= 4.7 in C++11 mode */
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// This macro indicates that there is not even a basic <type_traits> standard header that is sufficient for most Boost.Atomic needs.
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#define BOOST_ATOMIC_DETAIL_NO_CXX11_BASIC_HDR_TYPE_TRAITS
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#endif
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#endif // defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
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#if defined(BOOST_NO_CXX11_ALIGNAS) ||\
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(defined(BOOST_GCC) && BOOST_GCC < 40900) ||\
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(defined(BOOST_MSVC) && BOOST_MSVC < 1910 && defined(_M_IX86))
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// gcc prior to 4.9 doesn't support alignas with a constant expression as an argument.
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// MSVC 14.0 does support alignas, but in 32-bit mode emits "error C2719: formal parameter with requested alignment of N won't be aligned" for N > 4,
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// when aligned types are used in function arguments, even though the std::max_align_t type has alignment of 8.
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#define BOOST_ATOMIC_DETAIL_NO_CXX11_ALIGNAS
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#endif
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#if defined(BOOST_NO_CXX11_CONSTEXPR) || (defined(BOOST_GCC) && BOOST_GCC < 40800)
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// This macro indicates that the compiler doesn't support constexpr constructors that initialize one member
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// of an anonymous union member of the class.
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#define BOOST_ATOMIC_DETAIL_NO_CXX11_CONSTEXPR_UNION_INIT
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_CONSTEXPR_UNION_INIT)
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#define BOOST_ATOMIC_DETAIL_CONSTEXPR_UNION_INIT BOOST_CONSTEXPR
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#else
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#define BOOST_ATOMIC_DETAIL_CONSTEXPR_UNION_INIT
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#endif
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// Enable pointer/reference casts between storage and value when possible.
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// Note: Despite that MSVC does not employ strict aliasing rules for optimizations
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// and does not require an explicit markup for types that may alias, we still don't
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// enable the optimization for this compiler because at least MSVC-8 and 9 are known
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// to generate broken code sometimes when casts are used.
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#define BOOST_ATOMIC_DETAIL_MAY_ALIAS BOOST_MAY_ALIAS
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#if !defined(BOOST_NO_MAY_ALIAS)
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#define BOOST_ATOMIC_DETAIL_STORAGE_TYPE_MAY_ALIAS
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#endif
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#if defined(__GCC_ASM_FLAG_OUTPUTS__)
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// The compiler supports output values in flag registers.
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// See: https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html, Section 6.44.3.
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#define BOOST_ATOMIC_DETAIL_ASM_HAS_FLAG_OUTPUTS
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#endif
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#if defined(BOOST_INTEL) || (defined(BOOST_GCC) && BOOST_GCC < 40700) ||\
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(defined(BOOST_CLANG) && !defined(__apple_build_version__) && (__clang_major__ * 100 + __clang_minor__) < 302) ||\
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(defined(__clang__) && defined(__apple_build_version__) && (__clang_major__ * 100 + __clang_minor__) < 402)
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// Intel compiler (at least 18.0 update 1) breaks if noexcept specification is used in defaulted function declarations:
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// error: the default constructor of "boost::atomics::atomic<T>" cannot be referenced -- it is a deleted function
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// GCC 4.6 doesn't seem to support that either. Clang 3.1 deduces wrong noexcept for the defaulted function and fails as well.
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#define BOOST_ATOMIC_DETAIL_DEF_NOEXCEPT_DECL
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#define BOOST_ATOMIC_DETAIL_DEF_NOEXCEPT_IMPL BOOST_NOEXCEPT
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#else
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#define BOOST_ATOMIC_DETAIL_DEF_NOEXCEPT_DECL BOOST_NOEXCEPT
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#define BOOST_ATOMIC_DETAIL_DEF_NOEXCEPT_IMPL
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#endif
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#if defined(__has_builtin)
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#if __has_builtin(__builtin_constant_p)
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#define BOOST_ATOMIC_DETAIL_IS_CONSTANT(x) __builtin_constant_p(x)
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#endif
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#if __has_builtin(__builtin_clear_padding)
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#define BOOST_ATOMIC_DETAIL_CLEAR_PADDING(x) __builtin_clear_padding(x)
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#elif __has_builtin(__builtin_zero_non_value_bits)
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#define BOOST_ATOMIC_DETAIL_CLEAR_PADDING(x) __builtin_zero_non_value_bits(x)
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#endif
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_IS_CONSTANT) && defined(__GNUC__)
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#define BOOST_ATOMIC_DETAIL_IS_CONSTANT(x) __builtin_constant_p(x)
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_IS_CONSTANT)
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#define BOOST_ATOMIC_DETAIL_IS_CONSTANT(x) false
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_CLEAR_PADDING) && defined(BOOST_MSVC) && BOOST_MSVC >= 1927
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// Note that as of MSVC 19.29 this intrinsic does not clear padding in unions:
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// https://developercommunity.visualstudio.com/t/__builtin_zero_non_value_bits-does-not-c/1551510
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#define BOOST_ATOMIC_DETAIL_CLEAR_PADDING(x) __builtin_zero_non_value_bits(x)
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_CLEAR_PADDING)
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#define BOOST_ATOMIC_NO_CLEAR_PADDING
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#define BOOST_ATOMIC_DETAIL_CLEAR_PADDING(x)
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#endif
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#if (defined(__BYTE_ORDER__) && defined(__FLOAT_WORD_ORDER__) && __BYTE_ORDER__ == __FLOAT_WORD_ORDER__) ||\
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defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64)
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// This macro indicates that integer and floating point endianness is the same
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#define BOOST_ATOMIC_DETAIL_INT_FP_ENDIAN_MATCH
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#endif
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// Deprecated symbols markup
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#if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && defined(_MSC_VER)
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#if (_MSC_VER) >= 1400
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#define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __declspec(deprecated(msg))
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#else
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// MSVC 7.1 only supports the attribute without a message
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#define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __declspec(deprecated)
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#endif
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && defined(__has_extension)
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#if __has_extension(attribute_deprecated_with_message)
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#define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __attribute__((deprecated(msg)))
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#endif
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#endif
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// gcc since 4.5 supports deprecated attribute with a message; older versions support the attribute without a message.
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// Oracle Studio 12.4 supports deprecated attribute with a message; this is the first release that supports the attribute.
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#if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && (\
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(defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 405) ||\
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(defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x5130))
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#define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __attribute__((deprecated(msg)))
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && __cplusplus >= 201402
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#define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) [[deprecated(msg)]]
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && defined(__GNUC__)
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#define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __attribute__((deprecated))
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && defined(__has_attribute)
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#if __has_attribute(deprecated)
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#define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __attribute__((deprecated))
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#endif
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#endif
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#if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED)
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#define BOOST_ATOMIC_DETAIL_DEPRECATED(msg)
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#endif
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// In Boost.Atomic 1.73 we deprecated atomic<>::storage() accessor in favor of atomic<>::value(). In future releases storage() will be removed.
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#if !defined(BOOST_ATOMIC_SILENCE_STORAGE_DEPRECATION)
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#define BOOST_ATOMIC_DETAIL_STORAGE_DEPRECATED BOOST_ATOMIC_DETAIL_DEPRECATED("Boost.Atomic 1.73 has deprecated atomic<>::storage() in favor of atomic<>::value() and atomic<>::storage_type in favor of atomic<>::value_type. You can define BOOST_ATOMIC_SILENCE_STORAGE_DEPRECATION to disable this warning.")
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#else
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#define BOOST_ATOMIC_DETAIL_STORAGE_DEPRECATED
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#endif
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#endif // BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_
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