openmpi/ompi/mpi/c/initialized.c

/*
 * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 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.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */

#include "ompi_config.h"

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

#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Initialized = PMPI_Initialized
#endif

#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif

static const char FUNC_NAME[] = "MPI_Initialized";


int MPI_Initialized(int *flag)
{
    MPI_Comm null = NULL;

    OPAL_CR_NOOP_PROGRESS();

    if (MPI_PARAM_CHECK) {
        if (NULL == flag) {

            /* If we have an error, the action that we take depends on
               whether we're currently (after MPI_Init and before
               MPI_Finalize) or not */

            if (ompi_mpi_initialized && !ompi_mpi_finalized) {
                return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG,
                                              FUNC_NAME);
            } else {
                return OMPI_ERRHANDLER_INVOKE(null, MPI_ERR_ARG,
                                              FUNC_NAME);
            }
        }
    }

    /* Pretty simple */

    *flag = ompi_mpi_initialized;
    return MPI_SUCCESS;
}