text: /*
   * 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(__CUDACC__)
  // nvcc does not support alternatives ("q,m") 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(__i386__) || defined(__x86_64__)) && (defined(__clang__) || (defined(BOOST_GCC) && (BOOST_GCC+0) < 40500) || defined(__SUNPRO_CC))
  // This macro indicates that the compiler does not support allocating eax:edx or rax:rdx register pairs ("A") in asm blocks
  #define BOOST_ATOMIC_DETAIL_X86_NO_ASM_AX_DX_PAIRS
  #endif
  
  #if defined(__i386__) && (defined(__PIC__) || defined(__PIE__)) && !(defined(__clang__) || (defined(BOOST_GCC) && (BOOST_GCC+0) >= 50100))
  // This macro indicates that asm blocks should preserve ebx value unchanged. Some compilers are able to maintain ebx themselves
  // around the asm blocks. For those compilers we don't need to save/restore ebx in asm blocks.
  #define BOOST_ATOMIC_DETAIL_X86_ASM_PRESERVE_EBX
  #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 not even a basic <type_traits> standard header that is sufficient for most Boost.Atomic needs.
  #define BOOST_ATOMIC_DETAIL_NO_CXX11_BASIC_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.
  #define BOOST_ATOMIC_DETAIL_MAY_ALIAS BOOST_MAY_ALIAS
  #if !defined(BOOST_NO_MAY_ALIAS)
  #define BOOST_ATOMIC_DETAIL_STORAGE_TYPE_MAY_ALIAS
  #endif
  
  #if defined(__GCC_ASM_FLAG_OUTPUTS__)
  // The compiler supports output values in flag registers.
  // See: https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html, Section 6.44.3.
  #define BOOST_ATOMIC_DETAIL_ASM_HAS_FLAG_OUTPUTS
  #endif
  
  #if defined(__has_builtin)
  #if __has_builtin(__builtin_constant_p)
  #define BOOST_ATOMIC_DETAIL_IS_CONSTANT(x) __builtin_constant_p(x)
  #endif
  #elif defined(__GNUC__)
  #define BOOST_ATOMIC_DETAIL_IS_CONSTANT(x) __builtin_constant_p(x)
  #endif
  
  #if !defined(BOOST_ATOMIC_DETAIL_IS_CONSTANT)
  #define BOOST_ATOMIC_DETAIL_IS_CONSTANT(x) false
  #endif
  
  #if (defined(__BYTE_ORDER__) && defined(__FLOAT_WORD_ORDER__) && (__BYTE_ORDER__+0) == (__FLOAT_WORD_ORDER__+0)) ||\
      defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64)
  // This macro indicates that integer and floating point endianness is the same
  #define BOOST_ATOMIC_DETAIL_INT_FP_ENDIAN_MATCH
  #endif
  
  // Deprecated symbols markup
  #if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && defined(_MSC_VER)
  #if (_MSC_VER) >= 1400
  #define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __declspec(deprecated(msg))
  #else
  // MSVC 7.1 only supports the attribute without a message
  #define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __declspec(deprecated)
  #endif
  #endif
  
  #if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && defined(__has_extension)
  #if __has_extension(attribute_deprecated_with_message)
  #define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __attribute__((deprecated(msg)))
  #endif
  #endif
  
  // gcc since 4.5 supports deprecated attribute with a message; older versions support the attribute without a message.
  // Oracle Studio 12.4 supports deprecated attribute with a message; this is the first release that supports the attribute.
  #if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && (\
      (defined(__GNUC__) && ((__GNUC__ + 0) * 100 + (__GNUC_MINOR__ + 0)) >= 405) ||\
      (defined(__SUNPRO_CC) && (__SUNPRO_CC + 0) >= 0x5130))
  #define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __attribute__((deprecated(msg)))
  #endif
  
  #if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && __cplusplus >= 201402
  #define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) [[deprecated(msg)]]
  #endif
  
  #if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && defined(__GNUC__)
  #define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __attribute__((deprecated))
  #endif
  
  #if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED) && defined(__has_attribute)
  #if __has_attribute(deprecated)
  #define BOOST_ATOMIC_DETAIL_DEPRECATED(msg) __attribute__((deprecated))
  #endif
  #endif
  
  #if !defined(BOOST_ATOMIC_DETAIL_DEPRECATED)
  #define BOOST_ATOMIC_DETAIL_DEPRECATED(msg)
  #endif
  
  // In Boost.Atomic 1.67 we changed (op)_and_test methods to return true when the result is non-zero. This would be more consistent
  // with the other names used in Boost.Atomic and the C++ standard library. Since the methods were announced as experimental and
  // the previous behavior was released only in Boost 1.66, it was decided to change the result without changing the method names.
  // By defining BOOST_ATOMIC_HIGHLIGHT_OP_AND_TEST the user has a way to highlight all uses of the affected functions so
  // that it is easier to find and update the affected code (which is typically adding or removing negation of the result). This
  // highlighting functionality is a temporary measure to help users upgrade from Boost 1.66 to newer Boost versions. It will
  // be removed eventually.
  //
  // More info at:
  // https://github.com/boostorg/atomic/issues/11
  // http://boost.2283326.n4.nabble.com/atomic-op-and-test-naming-tc4701445.html
  #if defined(BOOST_ATOMIC_HIGHLIGHT_OP_AND_TEST)
  #define BOOST_ATOMIC_DETAIL_HIGHLIGHT_OP_AND_TEST BOOST_ATOMIC_DETAIL_DEPRECATED("Boost.Atomic 1.67 has changed (op)_and_test result to the opposite. The functions now return true when the result is non-zero. Please, verify your use of the operation and undefine BOOST_ATOMIC_HIGHLIGHT_OP_AND_TEST.")
  #else
  #define BOOST_ATOMIC_DETAIL_HIGHLIGHT_OP_AND_TEST
  #endif
  
  #endif // BOOST_ATOMIC_DETAIL_CONFIG_HPP_INCLUDED_
  