Chris@102: // Copyright (C) 2007 Matthias Troyer
Chris@102: //
Chris@102: // Use, modification and distribution is subject to the Boost Software
Chris@102: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@102: //
Chris@102: // This file contains helper data structures for use in transmitting
Chris@102: // properties. The basic idea is to optimize away any storage for the
Chris@102: // properties when no properties are specified.
Chris@102: #ifndef BOOST_PARALLEL_DETAIL_UNTRACKED_PAIR_HPP
Chris@102: #define BOOST_PARALLEL_DETAIL_UNTRACKED_PAIR_HPP
Chris@102: 
Chris@102: #include <boost/mpi/datatype.hpp>
Chris@102: #include <utility> // for std::pair
Chris@102: #include <boost/serialization/utility.hpp>
Chris@102: 
Chris@102: namespace boost { namespace parallel { namespace detail {
Chris@102: 
Chris@102: /**
Chris@102:  * This structure is like std::pair, with the only difference
Chris@102:  * that tracking in the serialization library is turned off.
Chris@102:  */
Chris@102:  
Chris@102: template<typename T, typename U>
Chris@102: struct untracked_pair : public std::pair<T,U>
Chris@102: {
Chris@102:   untracked_pair() {}
Chris@102: 
Chris@102:   untracked_pair(const T& t, const U& u)
Chris@102:   : std::pair<T,U>(t,u) {}
Chris@102: 
Chris@102:   template<class T1, class U1>
Chris@102:   untracked_pair(std::pair<T1,U1> const& p)
Chris@102:   : std::pair<T,U>(p) {}  
Chris@102: };
Chris@102: 
Chris@102: template<typename T, typename U>
Chris@102: inline untracked_pair<T, U>
Chris@102: make_untracked_pair(const T& t, const U& u)
Chris@102: {
Chris@102:   return untracked_pair<T,U>(t,u);
Chris@102: }
Chris@102: 
Chris@102: } } } // end namespace boost::parallel::detail
Chris@102: 
Chris@102: namespace boost { namespace mpi {
Chris@102: 
Chris@102: template<typename T, typename U>
Chris@102: struct is_mpi_datatype<boost::parallel::detail::untracked_pair<T, U> >
Chris@102:   : is_mpi_datatype<std::pair<T,U> > {};
Chris@102: 
Chris@102: } } // end namespace boost::mpi
Chris@102: 
Chris@102: namespace boost { namespace serialization {
Chris@102: 
Chris@102: // pair
Chris@102: template<class Archive, class F, class S>
Chris@102: inline void serialize(
Chris@102:     Archive & ar,
Chris@102:     boost::parallel::detail::untracked_pair<F, S> & p,
Chris@102:     const unsigned int /* file_version */
Chris@102: ){
Chris@102:     ar & boost::serialization::make_nvp("first", p.first);
Chris@102:     ar & boost::serialization::make_nvp("second", p.second);
Chris@102: }
Chris@102: 
Chris@102: template<typename T, typename U>
Chris@102: struct is_bitwise_serializable<
Chris@102:         boost::parallel::detail::untracked_pair<T, U> >
Chris@102:   : is_bitwise_serializable<std::pair<T, U> > {};
Chris@102: 
Chris@102: template<typename T, typename U>
Chris@102: struct implementation_level<boost::parallel::detail::untracked_pair<T, U> >
Chris@102:  : mpl::int_<object_serializable> {} ;
Chris@102: 
Chris@102: template<typename T, typename U>
Chris@102: struct tracking_level<boost::parallel::detail::untracked_pair<T, U> >
Chris@102:  : mpl::int_<track_never> {} ;
Chris@102: 
Chris@102: } } // end namespace boost::serialization
Chris@102: 
Chris@102: #endif // BOOST_PARALLEL_DETAIL_UNTRACKED_PAIR_HPP