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// (C) Copyright 2005 Matthias Troyer
// Use, modification and distribution is subject to 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)
// Authors: Matthias Troyer
#ifndef BOOST_MPI_DETAIL_MPI_DATATYPE_OARCHIVE_HPP
#define BOOST_MPI_DETAIL_MPI_DATATYPE_OARCHIVE_HPP
#include <boost/type_traits/is_enum.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/archive/detail/oserializer.hpp>
#include <boost/archive/detail/auto_link_archive.hpp>
#include <boost/archive/basic_archive.hpp>
#include <boost/mpi/detail/ignore_skeleton_oarchive.hpp>
#include <boost/mpi/detail/mpi_datatype_primitive.hpp>
#include <boost/mpi/datatype_fwd.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/static_assert.hpp>
#include <boost/integer.hpp>
#include <boost/archive/detail/register_archive.hpp>
namespace boost { namespace mpi { namespace detail {
// an archive wrapper that stores only the data members but not the
// special types defined by the serialization library
// to define the data skeletons (classes, pointers, container sizes, ...)
class mpi_datatype_oarchive
: public mpi_datatype_primitive,
public ignore_skeleton_oarchive<mpi_datatype_oarchive>
{
public:
template <class T>
mpi_datatype_oarchive(const T& x)
: mpi_datatype_primitive(&x) // register address
{
BOOST_MPL_ASSERT((is_mpi_datatype<T>));
*this << x; // serialize the object
}
template<class T>
void save_override(T const& t)
{
save_enum(t,boost::is_enum<T>());
}
template<class T>
void save_enum(T const& t, mpl::false_)
{
ignore_skeleton_oarchive<mpi_datatype_oarchive>::save_override(t);
}
template<class T>
void save_enum(T const& t, mpl::true_)
{
// select the right sized integer for the enum
typedef typename boost::uint_t<8*sizeof(T)>::least int_type;
BOOST_STATIC_ASSERT((sizeof(T)==sizeof(int_type)));
this->save(*reinterpret_cast<int_type const*>(&t));
}
};
} } } // end namespace boost::mpi::detail
// required by export
BOOST_SERIALIZATION_REGISTER_ARCHIVE(boost::mpi::detail::mpi_datatype_oarchive)
BOOST_SERIALIZATION_REGISTER_ARCHIVE(boost::mpi::detail::ignore_skeleton_oarchive<boost::mpi::detail::mpi_datatype_oarchive>)
BOOST_SERIALIZATION_USE_ARRAY_OPTIMIZATION(boost::mpi::detail::mpi_datatype_oarchive)
#endif // BOOST_MPI_DETAIL_MPI_DATATYPE_OARCHIVE_HPP
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