/* -*- 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"; 

	MPI::Finalize();

	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();

    if (rank == 0) {

	cout << " No Errors\n";

    }

    MPI::Finalize();

    return 0;

}