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