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+/********************************************************************
+ *
+ * Testing for thread safety in H5A (dataset attribute) library
+ * operations. -- Threaded program --
+ * ------------------------------------------------------------------
+ *
+ * Plan: Attempt to break H5Acreate by making many simultaneous create
+ * calls.
+ *
+ * Claim: N calls to H5Acreate should create N attributes for a dataset
+ * if threadsafe. If some unprotected shared data exists for the
+ * dataset (eg, a count of the number of attributes in the
+ * dataset), there is a small chance that consecutive reads occur
+ * before a write to that shared variable.
+ *
+ * Created: Oct 5 1999
+ * Programmer: Chee Wai LEE
+ *
+ * Modification History
+ * --------------------
+ * May 15 2000 - incorporated into library tests (Chee Wai LEE)
+ *
+ ********************************************************************/
+
+#include "ttsafe.h"
+
+#ifndef H5_HAVE_THREADSAFE
+static int dummy; /* just to create a non-empty object file */
+#else
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define FILE "ttsafe.h5"
+#define DATASETNAME "IntData"
+#define NUM_THREADS 16
+
+void *tts_acreate_thread(void *);
+
+typedef struct acreate_data_struct {
+ hid_t dataset;
+ hid_t datatype;
+ hid_t dataspace;
+ int current_index;
+} ttsafe_name_data_t;
+
+void tts_acreate(void) {
+
+ /* Pthread definitions
+ */
+ pthread_t threads[NUM_THREADS];
+
+ /* HDF5 data definitions
+ */
+ hid_t file, dataset;
+ hid_t dataspace, datatype;
+ hid_t attribute;
+ hsize_t dimsf[1]; /* dataset dimensions */
+
+ int data; /* data to write */
+ int buffer, ret;
+
+ int i;
+ ttsafe_name_data_t *attrib_data;
+
+ /* create a hdf5 file using H5F_ACC_TRUNC access,
+ * default file creation plist and default file
+ * access plist
+ */
+ file = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+
+ /* create a simple dataspace for the dataset
+ */
+ dimsf[0] = 1;
+ dataspace = H5Screate_simple(1,dimsf,NULL);
+
+ /* define datatype for the data using native little endian integers
+ */
+ datatype = H5Tcopy(H5T_NATIVE_INT);
+ H5Tset_order(datatype, H5T_ORDER_LE);
+
+ /* create a new dataset within the file
+ */
+ dataset = H5Dcreate(file, DATASETNAME, datatype, dataspace,
+ H5P_DEFAULT);
+
+ /* initialize data for dataset and write value to dataset
+ */
+ data = NUM_THREADS;
+ H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL,
+ H5P_DEFAULT, &data);
+
+ /* simultaneously create a large number of attributes to be
+ associated with the dataset
+ */
+
+ for (i=0;i<NUM_THREADS;i++) {
+ attrib_data = malloc(sizeof(ttsafe_name_data_t));
+ attrib_data->dataset = dataset;
+ attrib_data->datatype = datatype;
+ attrib_data->dataspace = dataspace;
+ attrib_data->current_index = i;
+ pthread_create(&threads[i],NULL,tts_acreate_thread,attrib_data);
+ }
+
+ for (i=0;i<NUM_THREADS;i++) {
+ pthread_join(threads[i],NULL);
+ }
+
+ /* verify the correctness of the test */
+ for (i=0; i<NUM_THREADS; i++) {
+ attribute = H5Aopen_name(dataset,gen_name(i));
+ if (attribute < 0) {
+ fprintf(stderr,"unable to open appropriate attribute. Test failed!\n");
+ } else {
+ ret = H5Aread(attribute, H5T_NATIVE_INT, &buffer);
+ if ((ret < 0) || (buffer != i)) {
+ fprintf(stderr,"wrong data values. Test failed!\n");
+ }
+ H5Aclose(attribute);
+ }
+ }
+
+ /* close remaining resources
+ */
+ H5Sclose(dataspace);
+ H5Tclose(datatype);
+ H5Dclose(dataset);
+ H5Fclose(file);
+}
+
+void *tts_acreate_thread(void *client_data) {
+
+ hid_t attribute;
+ hsize_t dimsf[1]; /* dataset dimensions */
+
+ char *attribute_name;
+ int *attribute_data; /* data for attributes */
+ int i;
+
+ ttsafe_name_data_t *attrib_data = (ttsafe_name_data_t *)client_data;
+
+ /* create attribute
+ */
+ attribute_name = gen_name(attrib_data->current_index);
+ attribute = H5Acreate(attrib_data->dataset,
+ attribute_name,
+ attrib_data->datatype,
+ attrib_data->dataspace,
+ H5P_DEFAULT);
+
+ /* Write data to the attribute
+ */
+ attribute_data = malloc(sizeof(int));
+ *attribute_data = attrib_data->current_index;
+ H5Awrite(attribute,H5T_NATIVE_INT,attribute_data);
+ H5Aclose(attribute);
+
+ return NULL;
+}
+
+void cleanup_acreate(void) {
+}
+
+#endif /*H5_HAVE_THREADSAFE*/
+