ceph/src/boost/libs/mpi/include/boost/mpi/detail/ignore_oprimitive.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_IGNORE_OPRIMITIVE_HPP
  10 #define BOOST_MPI_DETAIL_IGNORE_OPRIMITIVE_HPP
  11
  12 #include <boost/config.hpp>
  13 #include <boost/mpi/datatype.hpp>
  14 #include <boost/serialization/array.hpp>
  15
  16 namespace boost { namespace mpi { namespace detail {
  17
  18 /// @brief a minimal output archive, which ignores any save
  19 ///
  20 /// This class implements a minimal output archive, probably an output archive
  21 /// archetype, doing nothing at any save. It's use, besides acting as an
  22 /// archetype is as a base class to implement special archives that ignore
  23 /// saving of most types
  24
  25 class ignore_oprimitive
  26 {
  27 public:
  28     /// a trivial default constructor
  29     ignore_oprimitive()
  30     {}
  31
  32         /// don't do anything when saving binary data
  33     void save_binary(const void *, std::size_t )
  34     {
  35     }
  36
  37         /// don't do anything when saving arrays
  38     template<class T>
  39     void save_array(serialization::array_wrapper<T> const&, unsigned int )
  40     {
  41     }
  42
  43     typedef is_mpi_datatype<mpl::_1> use_array_optimization;
  44
  45
  46 #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
  47     friend class archive::save_access;
  48 protected:
  49 #else
  50 public:
  51 #endif
  52
  53         /// don't do anything when saving primitive types
  54     template<class T>
  55     void save(const T &)
  56     {
  57     }
  58 };
  59
  60 } } } // end namespace boost::mpi::detail
  61
  62 #endif // BOOST_MPI_DETAIL_IGNORE_OPRIMITIVE_HPP