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// Copyright (C) 2006 Douglas Gregor <doug.gregor -at- gmail.com>.

// 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)

// Skeleton and content support for communicators

// This header should be included only after both communicator.hpp and
// skeleton_and_content.hpp have been included.
#ifndef BOOST_MPI_COMMUNICATOR_SC_HPP
#define BOOST_MPI_COMMUNICATOR_SC_HPP

namespace boost { namespace mpi {

template<typename T>
void
communicator::send(int dest, int tag, const skeleton_proxy<T>& proxy) const
{
  packed_skeleton_oarchive ar(*this);
  ar << proxy.object;
  send(dest, tag, ar);
}

template<typename T>
status
communicator::recv(int source, int tag, const skeleton_proxy<T>& proxy) const
{
  packed_skeleton_iarchive ar(*this);
  status result = recv(source, tag, ar);
  ar >> proxy.object;
  return result;
}

template<typename T>
status communicator::recv(int source, int tag, skeleton_proxy<T>& proxy) const
{
  packed_skeleton_iarchive ar(*this);
  status result = recv(source, tag, ar);
  ar >> proxy.object;
  return result;
}

template<typename T>
request
communicator::isend(int dest, int tag, const skeleton_proxy<T>& proxy) const
{
  shared_ptr<packed_skeleton_oarchive> 
    archive(new packed_skeleton_oarchive(*this));

  *archive << proxy.object;
  request result = isend(dest, tag, *archive);
  result.m_data = archive;
  return result;
}

namespace detail {
  template<typename T>
  struct serialized_irecv_data<const skeleton_proxy<T> >
  {
    serialized_irecv_data(const communicator& comm, int source, int tag, 
                          skeleton_proxy<T> proxy)
      : comm(comm), source(source), tag(tag), isa(comm), 
        ia(isa.get_skeleton()), proxy(proxy) { }

    void deserialize(status& stat) 
    { 
      isa >> proxy.object;
      stat.m_count = 1;
    }

    communicator comm;
    int source;
    int tag;
    std::size_t count;
    packed_skeleton_iarchive isa;
    packed_iarchive& ia;
    skeleton_proxy<T> proxy;
  };

  template<typename T>
  struct serialized_irecv_data<skeleton_proxy<T> >
    : public serialized_irecv_data<const skeleton_proxy<T> >
  {
    typedef serialized_irecv_data<const skeleton_proxy<T> > inherited;

    serialized_irecv_data(const communicator& comm, int source, int tag, 
                          const skeleton_proxy<T>& proxy)
      : inherited(comm, source, tag, proxy) { }
  };
}

} } // end namespace boost::mpi

#endif // BOOST_MPI_COMMUNICATOR_SC_HPP