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Contents
/*
* 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) 2020 Andrey Semashev
*/
/*!
* \file atomic/detail/aligned_variable.hpp
*
* This header defines a convenience macro for declaring aligned variables
*/
#ifndef BOOST_ATOMIC_DETAIL_ALIGNED_VARIABLE_HPP_INCLUDED_
#define BOOST_ATOMIC_DETAIL_ALIGNED_VARIABLE_HPP_INCLUDED_
#include <boost/atomic/detail/config.hpp>
#if defined(BOOST_ATOMIC_DETAIL_NO_CXX11_ALIGNAS)
#include <boost/config/helper_macros.hpp>
#include <boost/type_traits/type_with_alignment.hpp>
#endif
#include <boost/atomic/detail/header.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
#if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_ALIGNAS)
#define BOOST_ATOMIC_DETAIL_ALIGNED_VAR(var_alignment, var_type, var_name) \
alignas(var_alignment) var_type var_name
#define BOOST_ATOMIC_DETAIL_ALIGNED_VAR_TPL(var_alignment, var_type, var_name) \
alignas(var_alignment) var_type var_name
#else // !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_ALIGNAS)
// Note: Some compilers cannot use constant expressions in alignment attributes or alignas, so we have to use the union trick
#define BOOST_ATOMIC_DETAIL_ALIGNED_VAR(var_alignment, var_type, var_name) \
union \
{ \
var_type var_name; \
boost::type_with_alignment< var_alignment >::type BOOST_JOIN(var_name, _aligner); \
}
#define BOOST_ATOMIC_DETAIL_ALIGNED_VAR_TPL(var_alignment, var_type, var_name) \
union \
{ \
var_type var_name; \
typename boost::type_with_alignment< var_alignment >::type BOOST_JOIN(var_name, _aligner); \
}
#endif // !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_ALIGNAS)
#include <boost/atomic/detail/footer.hpp>
#endif // BOOST_ATOMIC_DETAIL_ALIGNED_VARIABLE_HPP_INCLUDED_
Version data entries
17 entries across 17 versions & 1 rubygems