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