// Copyright (C) 2007 Matthias Troyer
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//
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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//
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// This file contains helper data structures for use in transmitting
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// properties. The basic idea is to optimize away any storage for the
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// properties when no properties are specified.
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#ifndef BOOST_PARALLEL_DETAIL_UNTRACKED_PAIR_HPP
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#define BOOST_PARALLEL_DETAIL_UNTRACKED_PAIR_HPP
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#include <boost/mpi/datatype.hpp>
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#include <utility> // for std::pair
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#include <boost/serialization/utility.hpp>
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namespace boost { namespace parallel { namespace detail {
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/**
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* This structure is like std::pair, with the only difference
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* that tracking in the serialization library is turned off.
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*/
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template<typename T, typename U>
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struct untracked_pair : public std::pair<T,U>
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{
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untracked_pair() {}
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untracked_pair(const T& t, const U& u)
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: std::pair<T,U>(t,u) {}
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template<class T1, class U1>
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untracked_pair(std::pair<T1,U1> const& p)
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: std::pair<T,U>(p) {}
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};
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template<typename T, typename U>
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inline untracked_pair<T, U>
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make_untracked_pair(const T& t, const U& u)
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{
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return untracked_pair<T,U>(t,u);
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}
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} } } // end namespace boost::parallel::detail
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namespace boost { namespace mpi {
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template<typename T, typename U>
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struct is_mpi_datatype<boost::parallel::detail::untracked_pair<T, U> >
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: is_mpi_datatype<std::pair<T,U> > {};
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} } // end namespace boost::mpi
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namespace boost { namespace serialization {
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// pair
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template<class Archive, class F, class S>
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inline void serialize(
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Archive & ar,
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boost::parallel::detail::untracked_pair<F, S> & p,
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const unsigned int /* file_version */
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){
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ar & boost::serialization::make_nvp("first", p.first);
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ar & boost::serialization::make_nvp("second", p.second);
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}
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template<typename T, typename U>
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struct is_bitwise_serializable<
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boost::parallel::detail::untracked_pair<T, U> >
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: is_bitwise_serializable<std::pair<T, U> > {};
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template<typename T, typename U>
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struct implementation_level<boost::parallel::detail::untracked_pair<T, U> >
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: mpl::int_<object_serializable> {} ;
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template<typename T, typename U>
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struct tracking_level<boost::parallel::detail::untracked_pair<T, U> >
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: mpl::int_<track_never> {} ;
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} } // end namespace boost::serialization
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#endif // BOOST_PARALLEL_DETAIL_UNTRACKED_PAIR_HPP
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