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Diffstat (limited to '3rdParty/Boost/src/boost/atomic/detail/casts.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/atomic/detail/casts.hpp | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/atomic/detail/casts.hpp b/3rdParty/Boost/src/boost/atomic/detail/casts.hpp new file mode 100644 index 0000000..db28bc2 --- /dev/null +++ b/3rdParty/Boost/src/boost/atomic/detail/casts.hpp @@ -0,0 +1,64 @@ +/* + * 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) 2009 Helge Bahmann + * Copyright (c) 2012 Tim Blechmann + * Copyright (c) 2013 - 2014 Andrey Semashev + */ +/*! + * \file atomic/detail/casts.hpp + * + * This header defines \c union_cast and \c memcpy_cast used to convert between storage and value types + */ + +#ifndef BOOST_ATOMIC_DETAIL_CASTS_HPP_INCLUDED_ +#define BOOST_ATOMIC_DETAIL_CASTS_HPP_INCLUDED_ + +#include <cstring> +#include <boost/atomic/detail/config.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +#pragma once +#endif + +namespace boost { +namespace atomics { +namespace detail { + +template< typename To, typename From > +BOOST_FORCEINLINE To union_cast(From const& from) BOOST_NOEXCEPT +{ + union + { + To as_to; + From as_from; + } + caster = {}; + caster.as_from = from; + return caster.as_to; +} + +template< typename To, typename From > +BOOST_FORCEINLINE To memcpy_cast(From const& from) BOOST_NOEXCEPT +{ + struct + { + To to; + } + value = {}; + std::memcpy + ( + &reinterpret_cast< char& >(value.to), + &reinterpret_cast< const char& >(from), + (sizeof(From) < sizeof(To) ? sizeof(From) : sizeof(To)) + ); + return value.to; +} + +} // namespace detail +} // namespace atomics +} // namespace boost + +#endif // BOOST_ATOMIC_DETAIL_CASTS_HPP_INCLUDED_ |