hdf5/testpar/t_init_term.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://www.hdfgroup.org/licenses.               *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Purpose: This test checks for the correct initialization and
 * termination of the HDF5 library with MPI init and finalize.
 */

#include "testphdf5.h"

int nerrors = 0; /* errors count */

static const char *FILENAME[] = {"after_mpi_fin", NULL};

int
main(int argc, char **argv)
{
    int      mpi_size, mpi_rank;
    MPI_Comm comm = MPI_COMM_WORLD;

    /* Initialize and finalize MPI */
    MPI_Init(&argc, &argv);
    MPI_Comm_size(comm, &mpi_size);
    MPI_Comm_rank(comm, &mpi_rank);

    if (MAINPROCESS)
        TESTING("Usage of Serial HDF5 after MPI_Finalize() is called");

    MPI_Finalize();

    nerrors += GetTestNumErrs();

    /* test if we can initialize the library with MPI being finalized
       and create a file serially */
    H5open();

    if (mpi_rank == 0) {
        char  filename[1024];
        hid_t file_id;

        h5_fixname(FILENAME[0], H5P_DEFAULT, filename, sizeof filename);
        file_id = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
        VRFY((file_id >= 0), "H5Fcreate succeeded");
        H5Fclose(file_id);
        file_id = -1;
    }

    H5close();

    if (MAINPROCESS) {
        if (0 == nerrors)
            PASSED();
        else
            H5_FAILED();
    }

    return (nerrors != 0);
}