Moved remaining SWMR-related test files to develop.

1 files changed, 653 insertions, 0 deletions

diff --git a/test/use_common.c b/test/use_common.c
new file mode 100644
index 0000000..99c0bd1
--- /dev/null
+++ b/test/use_common.c
@@ -0,0 +1,653 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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 files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include "h5test.h"
+
+/* This test uses many POSIX things that are not available on
+ * Windows. We're using a check for fork(2) here as a proxy for
+ * all POSIX/Unix/Linux things until this test can be made
+ * more platform-independent.
+ */
+#ifdef H5_HAVE_FORK
+
+#include "use.h"
+
+#define H5D_FRIEND		/*suppress error about including H5Dpkg	  */
+#define H5D_TESTING
+#include "H5Dpkg.h"
+
+void
+usage(const char *prog)
+{
+    HDfprintf(stderr, "usage: %s [OPTIONS]\n", prog);
+    HDfprintf(stderr, "  OPTIONS\n");
+    HDfprintf(stderr, "     -h, --help            Print a usage message and exit\n");
+    HDfprintf(stderr, "     -f FN                 Test file name [default: %s.h5]\n", prog);
+    HDfprintf(stderr, "     -i N, --iteration=N   Number of iterations to repeat the whole thing. [default: 1]\n");
+    HDfprintf(stderr, "     -l w|r                launch writer or reader only. [default: launch both]\n");
+    HDfprintf(stderr, "     -n N, --nplanes=N     Number of planes to write/read. [default: 1000]\n");
+    HDfprintf(stderr, "     -s N, --swmr=N        Use SWMR mode (0: no, non-0: yes) default is yes\n");
+    HDfprintf(stderr, "     -z N, --chunksize=N   Chunk size [default: %d]\n", Chunksize_DFT);
+    HDfprintf(stderr, "     -y N, --chunkplanes=N Number of planes per chunk [default: 1]\n");
+    HDfprintf(stderr, "\n");
+} /* end usage() */
+
+/* Setup Use Case parameters by parsing command line options.
+* Setup default values if not set by options. */
+int
+parse_option(int argc, char * const argv[])
+{
+    int ret_value=0;
+    int c;
+    /* command line options: See function usage for a description */
+    const char *nagg_options = "f:hi:l:n:s:y:z:";
+
+    /* suppress getopt from printing error */
+    opterr = 0;
+
+    while (1){
+	c = getopt (argc, argv, nagg_options);
+	if (-1 == c)
+	    break;
+	switch (c) {
+	  case 'h':
+	    usage(progname_g);
+	    exit(0);
+	    break;
+	  case 'f':	/* usecase data file name */
+	    UC_opts.filename = optarg;
+	    break;
+	  case 'i':	/* iterations */
+	    if ((UC_opts.iterations = atoi(optarg)) <= 0){
+		fprintf(stderr, "bad iterations number %s, must be a positive integer\n", optarg);
+		usage(progname_g);
+		Hgoto_error(-1);
+	    };
+	    break;
+	  case 'l':	/* launch reader or writer only */
+	    switch (*optarg) {
+	      case 'r':	/* reader only */
+		UC_opts.launch = UC_READER;
+		break;
+	      case 'w': /* writer only */
+		UC_opts.launch = UC_WRITER;
+		break;
+	      default:
+		fprintf(stderr, "launch value(%c) should be w or r only.\n", *optarg);
+		usage(progname_g);
+		Hgoto_error(-1);
+		break;
+	    }
+	    break;
+	  case 'n':	/* number of planes to write/read */
+	    if ((UC_opts.nplanes = atoi(optarg)) <= 0){
+		fprintf(stderr, "bad number of planes %s, must be a positive integer\n", optarg);
+		usage(progname_g);
+		Hgoto_error(-1);
+	    };
+	    break;
+	  case 's':	/* use swmr file open mode */
+	    if ((UC_opts.use_swmr = atoi(optarg)) < 0){
+		fprintf(stderr, "swmr value should be 0(no) or 1(yes)\n");
+		usage(progname_g);
+		Hgoto_error(-1);
+	    };
+	    break;
+	  case 'y':	/* Number of planes per chunk */
+	    if ((UC_opts.chunkplanes = atoi(optarg)) <= 0){
+		fprintf(stderr, "bad number of planes per chunk %s, must be a positive integer\n", optarg);
+		usage(progname_g);
+		Hgoto_error(-1);
+	    };
+	    break;
+	  case 'z':	/* size of chunk=(z,z) */
+	    if ((UC_opts.chunksize = atoi(optarg)) <= 0){
+		fprintf(stderr, "bad chunksize %s, must be a positive integer\n", optarg);
+		usage(progname_g);
+		Hgoto_error(-1);
+	    };
+	    break;
+	  case '?':
+	    fprintf(stderr, "getopt returned '%c'.\n", c);
+	    Hgoto_error(-1);
+	  default:
+	    fprintf(stderr, "getopt returned unexpected value.\n");
+	    fprintf(stderr, "Unexpected value is %d\n", c);
+	    Hgoto_error(-1);
+	}
+    }
+
+    /* set test file name if not given */
+    if (!UC_opts.filename){
+	/* default data file name is <progname>.h5 */
+	if ((UC_opts.filename=(char*)HDmalloc(HDstrlen(progname_g)+4))==NULL) {
+	    fprintf(stderr, "malloc: failed\n");
+	    Hgoto_error(-1);
+	};
+	HDstrcpy(UC_opts.filename, progname_g);
+	HDstrcat(UC_opts.filename, ".h5");
+    }
+
+done:
+    /* All done. */
+    return(ret_value);
+}
+
+/* Show parameters used for this use case */
+void show_parameters(void){
+    printf("===Parameters used:===\n");
+    printf("chunk dims=(%llu, %llu, %llu)\n", (unsigned long long)UC_opts.chunkdims[0], 
+        (unsigned long long)UC_opts.chunkdims[1], (unsigned long long)UC_opts.chunkdims[2]);
+    printf("dataset max dims=(%llu, %llu, %llu)\n", (unsigned long long)UC_opts.max_dims[0], 
+        (unsigned long long)UC_opts.max_dims[1], (unsigned long long)UC_opts.max_dims[2]);
+    printf("number of planes to write=%llu\n", (unsigned long long)UC_opts.nplanes);
+    printf("using SWMR mode=%s\n", UC_opts.use_swmr ? "yes(1)" : "no(0)");
+    printf("data filename=%s\n", UC_opts.filename);
+    printf("launch part=");
+	switch (UC_opts.launch){
+	case UC_READWRITE:
+	    printf("Reader/Writer\n");
+	    break;
+	case UC_WRITER:
+	    printf("Writer\n");
+	    break;
+	case UC_READER:
+	    printf("Reader\n");
+	    break;
+	default:
+	    /* should not happen */
+	    printf("Illegal part(%d)\n", UC_opts.launch);
+	};
+    printf("number of iterations=%d (not used yet)\n", UC_opts.iterations);
+    printf("===Parameters shown===\n");
+}
+
+/* Create the skeleton use case file for testing.
+ * It has one 3d dataset using chunked storage.
+ * The dataset is (unlimited, chunksize, chunksize).
+ * Dataset type is 2 bytes integer.
+ * It starts out "empty", i.e., first dimension is 0.
+ *
+ * Return: 0 succeed; -1 fail.
+ */
+int create_uc_file(void)
+{
+    hsize_t dims[3];		/* Dataset starting dimensions */
+    hid_t fid;          /* File ID for new HDF5 file */
+    hid_t dcpl;         /* Dataset creation property list */
+    hid_t sid;          /* Dataspace ID */
+    hid_t dsid;         /* Dataset ID */
+    hid_t fapl;         /* File access property list */
+    H5D_chunk_index_t idx_type; /* Chunk index type */
+
+    /* Create the file */
+    if((fapl = h5_fileaccess()) < 0)
+        return -1;
+    if(H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
+        return -1;
+    if((fid = H5Fcreate(UC_opts.filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl)) < 0)
+        return -1;
+
+    /* Set up dimension sizes */
+    dims[0] = 0;
+    dims[1] = dims[2] = UC_opts.max_dims[1];
+
+    /* Create dataspace for creating datasets */
+    if((sid = H5Screate_simple(3, dims, UC_opts.max_dims)) < 0)
+        return -1;
+
+    /* Create dataset creation property list */
+    if((dcpl = H5Pcreate(H5P_DATASET_CREATE)) < 0)
+        return -1;
+    if(H5Pset_chunk(dcpl, 3, UC_opts.chunkdims) < 0)
+        return -1;
+
+    /* create dataset of progname */
+    if((dsid = H5Dcreate2(fid, progname_g, UC_DATATYPE, sid, H5P_DEFAULT, dcpl, H5P_DEFAULT)) < 0)
+	return -1;
+
+    /* Check that the chunk index type is not version 1 B-tree.
+     * Version 1 B-trees are not supported under SWMR.
+     */
+    if(H5D__layout_idx_type_test(dsid, &idx_type) < 0)
+        return -1;
+    if(idx_type == H5D_CHUNK_IDX_BTREE) {
+        fprintf(stderr, "ERROR: Chunk index is version 1 B-tree: aborting.\n");
+        return -1;
+    }
+
+    /* Close everything */
+    if(H5Dclose(dsid) < 0)
+	return -1;
+    if(H5Pclose(fapl) < 0)
+        return -1;
+    if(H5Pclose(dcpl) < 0)
+        return -1;
+    if(H5Sclose(sid) < 0)
+        return -1;
+    if(H5Fclose(fid) < 0)
+        return -1;
+
+    return 0;
+}
+
+/* Append planes, each of (1,2*chunksize,2*chunksize) to the dataset.
+ * In other words, 4 chunks are appended to the dataset at a time.
+ * Fill each plan with the plane number and then write it at the nth plane.
+ * Increase the plane number and repeat till the end of dataset, when it
+ * reaches chunksize long. End product is a (2*chunksize)^3 cube.
+ *
+ * Return: 0 succeed; -1 fail.
+ */
+int write_uc_file(hbool_t tosend)
+{
+    hid_t	fid;          /* File ID for new HDF5 file */
+    hid_t	dsid;         /* dataset ID */
+    hid_t       fapl;         /* File access property list */
+    hid_t	dcpl;         /* Dataset creation property list */
+    char	*name;
+    UC_CTYPE	*buffer, *bufptr;	/* data buffer */
+    hsize_t	cz=UC_opts.chunksize;		/* Chunk size */
+    hid_t	f_sid;	    /* dataset file space id */
+    hid_t	m_sid;	    /* memory space id */
+    int		rank;	    /* rank */
+    hsize_t 	chunk_dims[3];	/* Chunk dimensions */
+    hsize_t	dims[3];    /* Dataspace dimensions */
+    hsize_t	memdims[3]; /* Memory space dimensions */
+    hsize_t	start[3] = {0,0,0}, count[3];    /* Hyperslab selection values */
+    hsize_t     i, j, k;
+
+    name = UC_opts.filename;
+
+    /* Open the file */
+    if((fapl = h5_fileaccess()) < 0)
+        return -1;
+    if(UC_opts.use_swmr)
+        if(H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
+            return -1;
+    if((fid = H5Fopen(name, H5F_ACC_RDWR | (UC_opts.use_swmr ? H5F_ACC_SWMR_WRITE : 0), fapl)) < 0){
+	fprintf(stderr, "H5Fopen failed\n");
+        return -1;
+    }
+
+    if(tosend)
+        /* Send a message that H5Fopen is complete--releasing the file lock */
+        h5_send_message(WRITER_MESSAGE, NULL, NULL);
+
+    /* Open the dataset of the program name */
+    if((dsid = H5Dopen2(fid, progname_g, H5P_DEFAULT)) < 0){
+	fprintf(stderr, "H5Dopen2 failed\n");
+	return -1;
+    }
+
+    /* Find chunksize used */
+    if ((dcpl = H5Dget_create_plist(dsid)) < 0){
+	fprintf(stderr, "H5Dget_create_plist failed\n");
+	return -1;
+    }
+    if (H5D_CHUNKED != H5Pget_layout(dcpl)){
+	fprintf(stderr, "storage layout is not chunked\n");
+	return -1;
+    }
+    if ((rank = H5Pget_chunk(dcpl, 3, chunk_dims)) != 3){
+	fprintf(stderr, "storage rank is not 3\n");
+	return -1;
+    }
+
+    /* verify chunk_dims against set paramenters */
+    if (chunk_dims[0]!=UC_opts.chunkdims[0] || chunk_dims[1] != cz || chunk_dims[2] != cz){
+	fprintf(stderr, "chunk size is not as expected. Got dims=(%llu,%llu,%llu)\n",
+	    (unsigned long long)chunk_dims[0], (unsigned long long)chunk_dims[1], 
+            (unsigned long long)chunk_dims[2]);
+	return -1;
+    }
+
+    /* allocate space for data buffer 1 X dims[1] X dims[2] of UC_CTYPE */
+    memdims[0]=1;
+    memdims[1] = UC_opts.dims[1];
+    memdims[2] = UC_opts.dims[2];
+    if ((buffer=(UC_CTYPE*)HDmalloc((size_t)memdims[1]*(size_t)memdims[2]*sizeof(UC_CTYPE)))==NULL) {
+	fprintf(stderr, "malloc: failed\n");
+	return -1;
+    };
+
+    /*
+     * Get dataset rank and dimension.
+     */
+    f_sid = H5Dget_space(dsid);    /* Get filespace handle first. */
+    rank  = H5Sget_simple_extent_ndims(f_sid);
+    if (rank != UC_RANK){
+	fprintf(stderr, "rank(%d) of dataset does not match\n", rank);
+	return -1;
+    }
+    if (H5Sget_simple_extent_dims(f_sid, dims, NULL) < 0){
+	fprintf(stderr, "H5Sget_simple_extent_dims got error\n");
+	return -1;
+    }
+    printf("dataset rank %d, dimensions %llu x %llu x %llu\n",
+	   rank, (unsigned long long)(dims[0]), (unsigned long long)(dims[1]), 
+           (unsigned long long)(dims[2]));
+    /* verify that file space dims are as expected and are consistent with memory space dims */
+    if (dims[0] != 0 || dims[1] != memdims[1] || dims[2] != memdims[2]){
+	fprintf(stderr, "dataset is not empty. Got dims=(%llu,%llu,%llu)\n",
+	    (unsigned long long)dims[0], (unsigned long long)dims[1], 
+            (unsigned long long)dims[2]);
+	return -1;
+    }
+    
+    /* setup mem-space for buffer */
+    if ((m_sid=H5Screate_simple(rank, memdims, NULL))<0){
+	fprintf(stderr, "H5Screate_simple for memory failed\n");
+	return -1;
+    };
+
+    /* write planes */
+    count[0]=1;
+    count[1]=dims[1];
+    count[2]=dims[2];
+    for (i=0; i<UC_opts.nplanes; i++){
+	/* fill buffer with value i+1 */
+	bufptr = buffer;
+	for (j=0; j<dims[1]; j++)
+	    for (k=0; k<dims[2]; k++)
+		*bufptr++ = i;
+
+        /* Cork the dataset's metadata in the cache, if SWMR is enabled */
+        if(UC_opts.use_swmr)
+            if(H5Odisable_mdc_flushes(dsid) < 0) {
+                fprintf(stderr, "H5Odisable_mdc_flushes failed\n");
+                return -1;
+            }
+
+	/* extend the dataset by one for new plane */
+	dims[0]=i+1;
+        if(H5Dset_extent(dsid, dims) < 0){
+	    fprintf(stderr, "H5Dset_extent failed\n");
+            return -1;
+	}
+
+        /* Get the dataset's dataspace */
+        if((f_sid = H5Dget_space(dsid)) < 0){
+	    fprintf(stderr, "H5Dset_extent failed\n");
+            return -1;
+	}
+
+	start[0]=i;
+        /* Choose the next plane to write */
+        if(H5Sselect_hyperslab(f_sid, H5S_SELECT_SET, start, NULL, count, NULL) < 0){
+	    fprintf(stderr, "Failed H5Sselect_hyperslab\n");
+            return -1;
+	}
+
+        /* Write plane to the dataset */
+        if(H5Dwrite(dsid, UC_DATATYPE, m_sid, f_sid, H5P_DEFAULT, buffer) < 0){
+	    fprintf(stderr, "Failed H5Dwrite\n");
+            return -1;
+	}
+
+        /* Uncork the dataset's metadata from the cache, if SWMR is enabled */
+        if(UC_opts.use_swmr)
+            if(H5Oenable_mdc_flushes(dsid) < 0) {
+                fprintf(stderr, "H5Oenable_mdc_flushes failed\n");
+                return -1;
+            }
+
+	/* flush file to make the just written plane available. */
+	if(H5Dflush(dsid) < 0)
+	{
+	    fprintf(stderr, "Failed to H5Fflush file\n");
+	    return -1;
+	}
+    }
+
+    /* Done writing. Free/Close all resources including data file */
+    HDfree(buffer);
+    if (H5Dclose(dsid) < 0){
+	fprintf(stderr, "Failed to close datasete\n");
+	return -1;
+    }
+    if (H5Sclose(m_sid) < 0){
+	fprintf(stderr, "Failed to close memory space\n");
+	return -1;
+    }
+    if (H5Sclose(f_sid) < 0){
+	fprintf(stderr, "Failed to close file space\n");
+	return -1;
+    }
+    if (H5Pclose(fapl) < 0){
+	fprintf(stderr, "Failed to property list\n");
+	return -1;
+    }
+    if (H5Fclose(fid) < 0){
+	fprintf(stderr, "Failed to close file id\n");
+	return -1;
+    }
+
+    return 0;
+}
+
+
+/* Read planes from the dataset.
+ * It expects the dataset is being changed (growing).
+ * It checks the unlimited dimension (1st one). When it increases,
+ * it will read in the new planes, one by one, and verify the data correctness.
+ * (The nth plan should contain all "n".)
+ * When the unlimited dimension grows to the chunksize (it becomes a cube),
+ * that is the expected end of data, the reader exits.
+ *
+ * Return: 0 succeed; -1 fail.
+ */
+int read_uc_file(hbool_t towait)
+{
+    hid_t   fapl;         /* file access property list ID */
+    hid_t	fid;          /* File ID for new HDF5 file */
+    hid_t	dsid;         /* dataset ID */
+    char	*name;
+    UC_CTYPE	*buffer, *bufptr;	/* read data buffer */
+    hid_t	f_sid;	    /* dataset file space id */
+    hid_t	m_sid;	    /* memory space id */
+    int		rank;	    /* rank */
+    hsize_t	dims[3];    /* Dataspace dimensions */
+    hsize_t	memdims[3]; /* Memory space dimensions */
+    hsize_t     nplane=0, nplane_old=0;	/* nth plane, last nth plane */
+    hsize_t	start[3] = {0,0,0}, count[3];    /* Hyperslab selection values */
+    hsize_t	j, k;
+    int		nreadererr=0;
+    int		nerrs;
+    int		nonewplane;
+
+    /* Before reading, wait for the message that H5Fopen is complete--file lock is released */
+    if(towait && h5_wait_message(WRITER_MESSAGE) < 0) {
+        fprintf(stderr, "Cannot find writer message file...failed\n");
+        return -1;
+    }
+
+    name = UC_opts.filename;
+
+    /* Open the file */
+    if((fapl = h5_fileaccess()) < 0)
+        return -1;
+    if((fid = H5Fopen(name, H5F_ACC_RDONLY | (UC_opts.use_swmr ? H5F_ACC_SWMR_READ : 0), fapl)) < 0){
+	fprintf(stderr, "H5Fopen failed\n");
+        return -1;
+    }
+    if (H5Pclose(fapl) < 0){
+	    fprintf(stderr, "Failed to property list\n");
+	    return -1;
+    }
+
+
+    /* Open the dataset of the program name */
+    if((dsid = H5Dopen2(fid, progname_g, H5P_DEFAULT)) < 0){
+	fprintf(stderr, "H5Dopen2 failed\n");
+	return -1;
+    }
+
+    /* allocate space for data buffer 1 X dims[1] X dims[2] of UC_CTYPE */
+    memdims[0]=1;
+    memdims[1] = UC_opts.dims[1];
+    memdims[2] = UC_opts.dims[2];
+    if ((buffer=(UC_CTYPE*)HDmalloc((size_t)memdims[1]*(size_t)memdims[2]*sizeof(UC_CTYPE)))==NULL) {
+	fprintf(stderr, "malloc: failed\n");
+	return -1;
+    };
+
+    /*
+     * Get dataset rank and dimension.
+     * Verify dimension is as expected (unlimited,2*chunksize,2*chunksize).
+     */
+    f_sid = H5Dget_space(dsid);    /* Get filespace handle first. */
+    rank  = H5Sget_simple_extent_ndims(f_sid);
+    if (rank != UC_RANK){
+	fprintf(stderr, "rank(%d) of dataset does not match\n", rank);
+	return -1;
+    }
+    if (H5Sget_simple_extent_dims(f_sid, dims, NULL) < 0){
+	fprintf(stderr, "H5Sget_simple_extent_dims got error\n");
+	return -1;
+    }
+    printf("dataset rank %d, dimensions %llu x %llu x %llu\n",
+	   rank, (unsigned long long)(dims[0]), (unsigned long long)(dims[1]),
+           (unsigned long long)(dims[2]));
+    /* verify that file space dims are as expected and are consistent with memory space dims */
+    if (dims[1] != memdims[1] || dims[2] != memdims[2]){
+	fprintf(stderr, "dataset dimension is not as expected. Got dims=(%llu,%llu,%llu)\n",
+	    (unsigned long long)dims[0], (unsigned long long)dims[1],
+            (unsigned long long)dims[2]);
+	fprintf(stderr, "But memdims=(%llu,%llu,%llu)\n",
+	    (unsigned long long)memdims[0], (unsigned long long)memdims[1], 
+            (unsigned long long)memdims[2]);
+	return -1;
+    }
+    
+    /* setup mem-space for buffer */
+    if ((m_sid=H5Screate_simple(rank, memdims, NULL))<0){
+	fprintf(stderr, "H5Screate_simple for memory failed\n");
+	return -1;
+    };
+
+    /* Read 1 plane at a time whenever the dataset grows larger
+     * (along dim[0]) */
+    count[0]=1;
+    count[1]=dims[1];
+    count[2]=dims[2];
+    /* quit when all nplanes  have been read */
+    nonewplane=0;
+    while (nplane_old < UC_opts.nplanes ){
+	/* print progress message according to if new planes are availalbe */
+	if (nplane_old < dims[0]) {
+	    if (nonewplane){
+		/* end the previous message */
+		printf("\n");
+		nonewplane=0;
+	    }
+	    printf("reading planes %llu to %llu\n", (unsigned long long)nplane_old, 
+                (unsigned long long)dims[0]);
+	}else{
+	    if (nonewplane){
+		printf(".");
+		if (nonewplane>=30){
+		    fprintf(stderr, "waited too long for new plane, quit.\n");
+		    return -1;
+		}
+	    }else{
+		/* print mesg only the first time; dots still no new plane */
+		printf("no new planes to read ");
+	    }
+	    nonewplane++;
+	    /* pause for a second */
+        HDsleep(1);
+	}
+	for (nplane=nplane_old; nplane < dims[0]; nplane++){
+	    /* read planes between last old nplanes and current extent */
+	    /* Get the dataset's dataspace */
+	    if((f_sid = H5Dget_space(dsid)) < 0){
+		fprintf(stderr, "H5Dget_space failed\n");
+		return -1;
+	    }
+
+	    start[0]=nplane;
+	    /* Choose the next plane to read */
+	    if(H5Sselect_hyperslab(f_sid, H5S_SELECT_SET, start, NULL, count, NULL) < 0){
+		fprintf(stderr, "H5Sselect_hyperslab failed\n");
+		return -1;
+	    }
+
+	    /* Read the plane from the dataset */
+	    if(H5Dread(dsid, UC_DATATYPE, m_sid, f_sid, H5P_DEFAULT, buffer) < 0){
+		fprintf(stderr, "H5Dread failed\n");
+		return -1;
+	    }
+
+	    /* compare read data with expected data value which is nplane */
+	    bufptr = buffer;
+	    nerrs=0;
+	    for (j=0; j<dims[1]; j++){
+		for (k=0; k<dims[2]; k++){
+		    if ((hsize_t)*bufptr++ != nplane){
+			if (++nerrs < ErrorReportMax){
+			    fprintf(stderr,
+				"found error %llu plane(%llu,%llu), expected %llu, got %d\n",
+				(unsigned long long)nplane, (unsigned long long)j, 
+                                (unsigned long long)k, (unsigned long long)nplane, (int)*(bufptr-1));
+			}
+		    }
+		}
+	    }
+	    if (nerrs){
+		nreadererr++;
+		fprintf(stderr, "found %d unexpected values in plane %llu\n", nerrs, 
+                    (unsigned long long)nplane);
+	    }
+	}
+	/* Have read all current planes */
+	nplane_old=dims[0];
+
+	/* check if dataset has grown since last time */
+#if 0
+	/* close dsid and file, then reopen them */
+	if (H5Dclose(dsid) < 0){
+	    fprintf(stderr, "H5Dclose failed\n");
+	    return -1;
+	}
+	if (H5Fclose(fid) < 0){
+	    fprintf(stderr, "H5Fclose failed\n");
+	    return -1;
+	}
+	if((fid = H5Fopen(name, H5F_ACC_RDONLY | (UC_opts.use_swmr ? H5F_ACC_SWMR_READ : 0), H5P_DEFAULT)) < 0){
+	    fprintf(stderr, "H5Fopen failed\n");
+	    return -1;
+	}
+	if((dsid = H5Dopen2(fid, progname_g, H5P_DEFAULT)) < 0){
+	    fprintf(stderr, "H5Dopen2 failed\n");
+	    return -1;
+	}
+#else
+	H5Drefresh(dsid);
+#endif
+	f_sid = H5Dget_space(dsid);    /* Get filespace handle first. */
+	if (H5Sget_simple_extent_dims(f_sid, dims, NULL) < 0){
+	    fprintf(stderr, "H5Sget_simple_extent_dims got error\n");
+	    return -1;
+	}
+    }
+
+    if (nreadererr)
+	return -1;
+    else
+	return 0;
+}
+
+#endif /* H5_HAVE_FORK */
+