boost/atomic/detail/config.hpp
/* * 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) 2012 Hartmut Kaiser * Copyright (c) 2014 Andrey Semashev */ /*! * \file atomic/detail/config.hpp * * This header defines configuraion macros for Boost.Atomic */ #ifndef BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_ #define BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_ #include <boost/config.hpp> #ifdef BOOST_HAS_PRAGMA_ONCE #pragma once #endif #if defined(__has_builtin) #if __has_builtin(__builtin_memcpy) #define BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCPY #endif #if __has_builtin(__builtin_memcmp) #define BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCMP #endif #elif defined(BOOST_GCC) #define BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCPY #define BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCMP #endif #if defined(BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCPY) #define BOOST_ATOMIC_DETAIL_MEMCPY __builtin_memcpy #else #define BOOST_ATOMIC_DETAIL_MEMCPY std::memcpy #endif #if defined(BOOST_ATOMIC_DETAIL_HAS_BUILTIN_MEMCMP) #define BOOST_ATOMIC_DETAIL_MEMCMP __builtin_memcmp #else #define BOOST_ATOMIC_DETAIL_MEMCMP std::memcmp #endif #if defined(__CUDACC__) // nvcc does not support alternatives in asm statement constraints #define BOOST_ATOMIC_DETAIL_NO_ASM_CONSTRAINT_ALTERNATIVES // nvcc does not support condition code register ("cc") clobber in asm statements #define BOOST_ATOMIC_DETAIL_NO_ASM_CLOBBER_CC #endif #if !defined(BOOST_ATOMIC_DETAIL_NO_ASM_CLOBBER_CC) #define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC "cc" #define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "cc", #else #define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC #define BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA #endif #if ((defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)) && (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) < 403)) ||\ defined(__SUNPRO_CC) // This macro indicates we're using older binutils that don't support implied zero displacements for memory opereands, // making code like this invalid: // movl 4+(%%edx), %%eax #define BOOST_ATOMIC_DETAIL_NO_ASM_IMPLIED_ZERO_DISPLACEMENTS #endif #if defined(__clang__) || (defined(BOOST_GCC) && (BOOST_GCC+0) < 40500) || defined(__SUNPRO_CC) // This macro indicates that the compiler does not support allocating rax:rdx register pairs ("A") in asm blocks #define BOOST_ATOMIC_DETAIL_NO_ASM_RAX_RDX_PAIRS #endif #if defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS) #if !(defined(BOOST_LIBSTDCXX11) && (BOOST_LIBSTDCXX_VERSION+0) >= 40700) /* libstdc++ from gcc >= 4.7 in C++11 mode */ // This macro indicates that there is no <type_traits> standard header that is sufficient for Boost.Atomic needs. #define BOOST_ATOMIC_DETAIL_NO_CXX11_HDR_TYPE_TRAITS #endif #endif // defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS) // Enable pointer/reference casts between storage and value when possible. // Note: Despite that MSVC does not employ strict aliasing rules for optimizations // and does not require an explicit markup for types that may alias, we still don't // enable the optimization for this compiler because at least MSVC-8 and 9 are known // to generate broken code sometimes when casts are used. #if defined(__GNUC__) && (!defined(BOOST_INTEL_CXX_VERSION) || (BOOST_INTEL_CXX_VERSION+0) >= 1300) #define BOOST_ATOMIC_DETAIL_MAY_ALIAS __attribute__((__may_alias__)) #define BOOST_ATOMIC_DETAIL_STORAGE_TYPE_MAY_ALIAS #elif defined(__has_attribute) #if __has_attribute(__may_alias__) #define BOOST_ATOMIC_DETAIL_MAY_ALIAS __attribute__((__may_alias__)) #define BOOST_ATOMIC_DETAIL_STORAGE_TYPE_MAY_ALIAS #endif #endif #if !defined(BOOST_ATOMIC_DETAIL_MAY_ALIAS) #define BOOST_ATOMIC_DETAIL_MAY_ALIAS #endif #endif // BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_