/* -*- Mode: C++; c-basic-offset:4 ; -*- */

/*

 *  (C) 2003 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpi.h"

#include "mpitestconf.h"

#ifdef HAVE_IOSTREAM

// Not all C++ compilers have iostream instead of iostream.h

#include <iostream>

#ifdef HAVE_NAMESPACE_STD

// Those that do often need the std namespace; otherwise, a bare "cout"

// is likely to fail to compile

using namespace std;

#endif

#else

#include <iostream.h>

#endif

#include "mpitestcxx.h"

int main(int argc, char *argv[])

{

    int error;

    int rank, size;

    char port[MPI_MAX_PORT_NAME];

    MPI::Status status;

    MPI::Intercomm comm;

    MTEST_VG_MEM_INIT(port, MPI_MAX_PORT_NAME * sizeof(char));

    MPI::Init(argc, argv);

    size = MPI::COMM_WORLD.Get_size();

    rank = MPI::COMM_WORLD.Get_rank();

    if (size < 2) {

        cout << "Two processes needed.\n";

        return 0;

    }

    if (rank == 0) {

        MPI::Open_port(MPI::INFO_NULL, port);

        MPI::COMM_WORLD.Send(port, MPI::MAX_PORT_NAME, MPI::CHAR, 1, 0);

        comm = MPI::COMM_SELF.Accept(port, MPI::INFO_NULL, 0);

        MPI::Close_port(port);

        comm.Disconnect();

    } else if (rank == 1) {

        MPI::COMM_WORLD.Recv(port, MPI::MAX_PORT_NAME, MPI::CHAR, 0, 0);

        comm = MPI::COMM_SELF.Connect(port, MPI::INFO_NULL, 0);

        comm.Disconnect();

    }

    MPI::COMM_WORLD.Barrier();

    MTest_Finalize(0);

    return 0;

}