ceph/src/boost/boost/atomic/detail/type_traits/alignment_of.hpp

   1 /*
   2  * Distributed under the Boost Software License, Version 1.0.
   3  * (See accompanying file LICENSE_1_0.txt or copy at
   4  * http://www.boost.org/LICENSE_1_0.txt)
   5  *
   6  * Copyright (c) 2020 Andrey Semashev
   7  */
   8 /*!
   9  * \file   atomic/detail/type_traits/alignment_of.hpp
  10  *
  11  * This header defines \c alignment_of type trait
  12  */
  13
  14 #ifndef BOOST_ATOMIC_DETAIL_TYPE_TRAITS_ALIGNMENT_OF_HPP_INCLUDED_
  15 #define BOOST_ATOMIC_DETAIL_TYPE_TRAITS_ALIGNMENT_OF_HPP_INCLUDED_
  16
  17 #include <boost/atomic/detail/config.hpp>
  18
  19 #if defined(BOOST_ATOMIC_DETAIL_NO_CXX11_BASIC_HDR_TYPE_TRAITS) ||\
  20     (defined(BOOST_GCC) && BOOST_GCC < 80100) ||\
  21     (defined(BOOST_CLANG) && !defined(__apple_build_version__) && __clang_major__ < 9) ||\
  22     (defined(BOOST_CLANG) && defined(__apple_build_version__) && __clang_major__ < 10)
  23 // For some compilers std::alignment_of gives the wrong result for 64-bit types on 32-bit targets
  24 #define BOOST_ATOMIC_DETAIL_NO_CXX11_STD_ALIGNMENT_OF
  25 #endif
  26
  27 #if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_STD_ALIGNMENT_OF)
  28 #include <type_traits>
  29 #else
  30 #include <boost/type_traits/alignment_of.hpp>
  31 #endif
  32
  33 #ifdef BOOST_HAS_PRAGMA_ONCE
  34 #pragma once
  35 #endif
  36
  37 namespace boost {
  38 namespace atomics {
  39 namespace detail {
  40
  41 #if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_STD_ALIGNMENT_OF)
  42 using std::alignment_of;
  43 #else
  44 using boost::alignment_of;
  45 #endif
  46
  47 } // namespace detail
  48 } // namespace atomics
  49 } // namespace boost
  50
  51 #endif // BOOST_ATOMIC_DETAIL_TYPE_TRAITS_ALIGNMENT_OF_HPP_INCLUDED_