Chris@102: // Copyright (C) 2006 The Trustees of Indiana University.
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: // http://www.boost.org/LICENSE_1_0.txt)
Chris@102: 
Chris@102: //  Authors: Douglas Gregor
Chris@102: //           Andrew Lumsdaine
Chris@102: 
Chris@102: // This file contains the "unsafe_serialize" routine, which transforms
Chris@102: // types they may not be serializable (such as void*) into
Chris@102: // serializable equivalents.
Chris@102: #ifndef BOOST_PROPERTY_MAP_UNSAFE_SERIALIZE_HPP
Chris@102: #define BOOST_PROPERTY_MAP_UNSAFE_SERIALIZE_HPP
Chris@102: 
Chris@102: #include <boost/mpi/datatype.hpp>
Chris@102: #include <boost/serialization/is_bitwise_serializable.hpp>
Chris@102: #include <boost/mpl/bool.hpp>
Chris@102: #include <boost/mpl/if.hpp>
Chris@102: #include <boost/cstdint.hpp>
Chris@102: #include <boost/static_assert.hpp>
Chris@102: #include <boost/type_traits.hpp>
Chris@102: #include <utility>
Chris@102: 
Chris@102: BOOST_IS_BITWISE_SERIALIZABLE(void*)
Chris@102: namespace boost { namespace mpi {
Chris@102:     template<> struct is_mpi_datatype<void*> : mpl::true_ { };
Chris@102: } } // end namespace boost::mpi
Chris@102: 
Chris@102: namespace boost {
Chris@102:   typedef mpl::if_c<(sizeof(int) == sizeof(void*)), 
Chris@102:                     int, 
Chris@102:                     mpl::if_c<(sizeof(long) == sizeof(void*)),
Chris@102:                               long,
Chris@102:                               mpl::if_c<(sizeof(void*) <= sizeof(boost::intmax_t)),
Chris@102:                                         boost::intmax_t,
Chris@102:                                         void>::type
Chris@102:                               >::type
Chris@102:                     >::type ptr_serialize_type;
Chris@102: 
Chris@102:   BOOST_STATIC_ASSERT ((!boost::is_void<ptr_serialize_type>::value));
Chris@102:     
Chris@102:   template<typename T> inline T& unsafe_serialize(T& x) { return x; }
Chris@102: 
Chris@102:   inline ptr_serialize_type& unsafe_serialize(void*& x)
Chris@102:   { return reinterpret_cast<ptr_serialize_type&>(x); }
Chris@102: 
Chris@102:   // Force Boost.MPI to serialize a void* like a ptr_serialize_type
Chris@102:   namespace mpi {
Chris@102:     template<> inline MPI_Datatype get_mpi_datatype<void*>(void* const& x)
Chris@102:     {
Chris@102:       return get_mpi_datatype<ptr_serialize_type>();
Chris@102:     }
Chris@102:   }
Chris@102: 
Chris@102:   template<typename T, typename U>
Chris@102:   struct unsafe_pair
Chris@102:   {
Chris@102:     unsafe_pair() { }
Chris@102:     unsafe_pair(const T& t, const U& u) : first(t), second(u) { }
Chris@102:     unsafe_pair(const std::pair<T, U>& p) : first(p.first), second(p.second) { }
Chris@102:     T first;
Chris@102:     U second;
Chris@102: 
Chris@102:     template<typename Archiver>
Chris@102:     void serialize(Archiver& ar, const unsigned /*version*/)
Chris@102:     {
Chris@102:       ar & unsafe_serialize(first) & unsafe_serialize(second);
Chris@102:     }
Chris@102:   };
Chris@102: 
Chris@102:   template<typename T, typename U>
Chris@102:   bool operator<(unsafe_pair<T,U> const& x, unsafe_pair<T,U> const& y)
Chris@102:   {
Chris@102:     return std::make_pair(x.first, x.second) < 
Chris@102:       std::make_pair(y.first, y.second);  
Chris@102:   }
Chris@102: 
Chris@102: } // end namespace boost
Chris@102: 
Chris@102: #endif // BOOST_PROPERTY_MAP_UNSAFE_SERIALIZE_HPP