mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-24 13:53:23 +03:00
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
/*
|
|
* 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_
|