ceph/src/boost/libs/mpi/include/boost/mpi/detail/mpi_datatype_oarchive.hpp

   1 // (C) Copyright 2005 Matthias Troyer
   2
   3 // Use, modification and distribution is subject to the Boost Software
   4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6
   7 //  Authors: Matthias Troyer
   8
   9 #ifndef BOOST_MPI_DETAIL_MPI_DATATYPE_OARCHIVE_HPP
  10 #define BOOST_MPI_DETAIL_MPI_DATATYPE_OARCHIVE_HPP
  11
  12 #include <boost/type_traits/is_enum.hpp>
  13 #include <boost/mpl/bool.hpp>
  14 #include <boost/archive/detail/oserializer.hpp>
  15 #include <boost/archive/detail/auto_link_archive.hpp>
  16 #include <boost/archive/basic_archive.hpp>
  17 #include <boost/mpi/detail/ignore_skeleton_oarchive.hpp>
  18 #include <boost/mpi/detail/mpi_datatype_primitive.hpp>
  19 #include <boost/mpi/datatype_fwd.hpp>
  20 #include <boost/mpl/assert.hpp>
  21 #include <boost/static_assert.hpp>
  22 #include <boost/integer.hpp>
  23 #include <boost/archive/detail/register_archive.hpp>
  24
  25 namespace boost { namespace mpi { namespace detail {
  26
  27
  28 // an archive wrapper that stores only the data members but not the
  29 // special types defined by the serialization library
  30 // to define the data skeletons (classes, pointers, container sizes, ...)
  31
  32 class mpi_datatype_oarchive
  33   : public mpi_datatype_primitive,
  34     public ignore_skeleton_oarchive<mpi_datatype_oarchive>
  35 {
  36 public:
  37     template <class T>
  38     mpi_datatype_oarchive(const T& x)
  39          :  mpi_datatype_primitive(&x) // register address
  40         {
  41           BOOST_MPL_ASSERT((is_mpi_datatype<T>));
  42           *this << x;                   // serialize the object
  43         }
  44
  45     template<class T>
  46     void save_override(T const& t)
  47     {
  48       save_enum(t,boost::is_enum<T>());
  49     }
  50
  51     template<class T>
  52     void save_enum(T const& t, mpl::false_)
  53     {
  54       ignore_skeleton_oarchive<mpi_datatype_oarchive>::save_override(t);
  55     }
  56
  57     template<class T>
  58     void save_enum(T const& t, mpl::true_)
  59     {
  60       // select the right sized integer for the enum
  61       typedef typename boost::uint_t<8*sizeof(T)>::least int_type;
  62       BOOST_STATIC_ASSERT((sizeof(T)==sizeof(int_type)));
  63       this->save(*reinterpret_cast<int_type const*>(&t));
  64     }
  65
  66 };
  67
  68 } } } // end namespace boost::mpi::detail
  69
  70 // required by export
  71 BOOST_SERIALIZATION_REGISTER_ARCHIVE(boost::mpi::detail::mpi_datatype_oarchive)
  72 BOOST_SERIALIZATION_REGISTER_ARCHIVE(boost::mpi::detail::ignore_skeleton_oarchive<boost::mpi::detail::mpi_datatype_oarchive>)
  73 BOOST_SERIALIZATION_USE_ARRAY_OPTIMIZATION(boost::mpi::detail::mpi_datatype_oarchive)
  74
  75 #endif // BOOST_MPI_DETAIL_MPI_DATATYPE_OARCHIVE_HPP