/*
 * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2020 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * Copyright (c) 2015      Research Organization for Information Science
 *                         and Technology (RIST). All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */
#include "ompi_config.h"
#include <stdio.h>

#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/communicator/communicator.h"
#include "ompi/errhandler/errhandler.h"

#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Comm_get_parent = PMPI_Comm_get_parent
#endif
#define MPI_Comm_get_parent PMPI_Comm_get_parent
#endif

static const char FUNC_NAME[] = "MPI_Comm_get_parent";


int MPI_Comm_get_parent(MPI_Comm *parent)
{
    if ( MPI_PARAM_CHECK ) {
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);

        if ( NULL == parent ) {
            return OMPI_ERRHANDLER_NOHANDLE_INVOKE(MPI_ERR_ARG,
                                          FUNC_NAME);
        }
    }

    /*
     * ompi_mpi_comm_parent is MPI_COMM_NULL, in case this
     * world has not been spawned by another MPI job.
     * This is also the return value required by MPI-2.
     */

     *parent = ompi_mpi_comm_parent;
     return MPI_SUCCESS;
}