hdf5/test/vds_swmr_writer.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 LICENSE 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.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include "h5test.h"
#include "vds_swmr.h"

int
main(int argc, char *argv[])
{
    int file_number = -1; /* Source file number               */

    hid_t fid    = H5I_INVALID_HID; /* HDF5 file ID                     */
    hid_t faplid = H5I_INVALID_HID; /* file access property list ID                */
    hid_t did    = H5I_INVALID_HID; /* dataset ID                       */
    hid_t msid   = H5I_INVALID_HID; /* memory dataspace ID              */
    hid_t fsid   = H5I_INVALID_HID; /* file dataspace ID                */

    hsize_t extent[RANK]; /* dataset extents                  */
    hsize_t start[RANK];  /* hyperslab start point            */

    int *buffer = NULL; /* data buffer                      */
    int  value  = -1;   /* value written to datasets        */

    hsize_t n_elements = 0; /* number of elements in a plane    */

    hsize_t i; /* iterator                         */
    hsize_t j; /* iterator                         */

    /******************************
     * Fill a source dataset file *
     ******************************/

    /* The file number is passed on the command line.
     * This is an integer index into the FILE_NAMES array.
     */
    if (argc != 2) {
        fprintf(stderr, "ERROR: Must pass the source file number on the command line.\n");
        return EXIT_FAILURE;
    }

    file_number = atoi(argv[1]);
    if (file_number < 0 || file_number >= N_SOURCES)
        TEST_ERROR;

    /* Open the source file and dataset */
    /* All SWMR files need to use the latest file format */
    if ((faplid = h5_fileaccess()) < 0)
        TEST_ERROR;
    if (H5Pset_libver_bounds(faplid, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
        TEST_ERROR;
    if ((fid = H5Fopen(FILE_NAMES[file_number], H5F_ACC_RDWR | H5F_ACC_SWMR_WRITE, faplid)) < 0)
        TEST_ERROR;
    if ((did = H5Dopen2(fid, SOURCE_DSET_PATH, H5P_DEFAULT)) < 0)
        TEST_ERROR;

    /* Create a data buffer that represents a plane */
    n_elements = PLANES[file_number][1] * PLANES[file_number][2];
    if (NULL == (buffer = (int *)malloc(n_elements * sizeof(int))))
        TEST_ERROR;

    /* Create the memory dataspace */
    if ((msid = H5Screate_simple(RANK, PLANES[file_number], NULL)) < 0)
        TEST_ERROR;

    /* Write planes to the dataset */
    for (i = 0; i < N_PLANES_TO_WRITE; i++) {

        time_t delay; /* Time interval between plane writes */

        /* Cork the dataset's metadata in the cache */
        if (H5Odisable_mdc_flushes(did) < 0)
            TEST_ERROR;

        /* Set the dataset's extent. This is inefficient but that's ok here. */
        extent[0] = i + 1;
        extent[1] = PLANES[file_number][1];
        extent[2] = PLANES[file_number][2];
        if (H5Dset_extent(did, extent) < 0)
            TEST_ERROR;

        /* Get the file dataspace */
        if ((fsid = H5Dget_space(did)) < 0)
            TEST_ERROR;

        /* Each plane is filled with the plane number as a data value. */
        value = (((int)i + 1) * 10) + (int)i;
        for (j = 0; j < n_elements; j++)
            buffer[j] = value;

        /* Set up the hyperslab for writing. */
        start[0] = i;
        start[1] = 0;
        start[2] = 0;
        if (H5Sselect_hyperslab(fsid, H5S_SELECT_SET, start, NULL, PLANES[file_number], NULL) < 0)
            TEST_ERROR;

        /* Write the plane to the dataset. */
        if (H5Dwrite(did, H5T_NATIVE_INT, msid, fsid, H5P_DEFAULT, buffer) < 0)
            TEST_ERROR;

        /* Uncork the dataset's metadata from the cache */
        if (H5Oenable_mdc_flushes(did) < 0)
            TEST_ERROR;

        /* Wait one second between writing planes */
        delay = time(0) + (time_t)1;
        while (time(0) < delay)
            ;

        /* Flush */
        if (H5Fflush(fid, H5F_SCOPE_GLOBAL) < 0)
            TEST_ERROR;

    } /* end for */

    if (H5Pclose(faplid) < 0)
        TEST_ERROR;
    if (H5Sclose(msid) < 0)
        TEST_ERROR;
    if (H5Sclose(fsid) < 0)
        TEST_ERROR;
    if (H5Dclose(did) < 0)
        TEST_ERROR;
    if (H5Fclose(fid) < 0)
        TEST_ERROR;
    free(buffer);

    fprintf(stderr, "SWMR writer exited successfully\n");
    return EXIT_SUCCESS;

error:

    H5E_BEGIN_TRY
    {
        if (fid >= 0)
            (void)H5Fclose(fid);
        if (faplid >= 0)
            (void)H5Pclose(faplid);
        if (did >= 0)
            (void)H5Dclose(did);
        if (msid >= 0)
            (void)H5Sclose(msid);
        if (fsid >= 0)
            (void)H5Sclose(fsid);
        if (buffer != NULL)
            free(buffer);
    }
    H5E_END_TRY

    fprintf(stderr, "ERROR: SWMR writer exited with errors\n");
    return EXIT_FAILURE;

} /* end main */