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-rw-r--r--test/ttsafe_cancel.c203
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diff --git a/test/ttsafe_cancel.c b/test/ttsafe_cancel.c
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+/********************************************************************
+ *
+ * Testing thread safety. Thread Cancellation safety
+ * -------------------------------------------------
+ *
+ * The main thread spawns a child to perform a series of dataset writes
+ * to a hdf5 file. The main thread and child thread synchronizes within
+ * a callback function called during a H5Diterate call afterwhich the
+ * main thread attempts to cancel the child thread.
+ *
+ * The cancellation should only work after the child thread has safely
+ * left the H5Diterate call.
+ *
+ * Temporary files generated:
+ * ttsafe.h5
+ *
+ * HDF5 APIs exercised in thread:
+ * H5Screate_simple, H5Tcopy, H5Tset_order, H5Dcreate, H5Dclose,
+ * H5Dwrite, H5Dread, H5Diterate, H5Tclose, H5Sclose.
+ *
+ * Created: May 15 2000
+ * Programmer: Chee Wai LEE
+ *
+ * Modification History
+ * --------------------
+ *
+ ********************************************************************/
+#include "ttsafe.h"
+
+#ifndef H5_HAVE_THREADSAFE
+static int dummy; /* just to create a non-empty object file */
+#else
+
+#define FILE "ttsafe.h5"
+#define DATASETNAME "commonname"
+
+void *tts_cancel_thread(void *);
+void tts_cancel_barrier(void);
+herr_t tts_cancel_callback(void *, hid_t, hsize_t, hssize_t *, void *);
+void cancellation_cleanup(void *);
+
+hid_t cancel_file;
+typedef struct cleanup_struct {
+ hid_t dataset;
+ hid_t datatype;
+ hid_t dataspace;
+} cancel_cleanup_t;
+
+pthread_t childthread;
+pthread_mutex_t mutex;
+pthread_cond_t cond;
+
+void tts_cancel(void) {
+
+ pthread_attr_t attribute;
+ hid_t dataset;
+
+ int buffer;
+
+ /* make thread scheduling global */
+ pthread_attr_init(&attribute);
+ pthread_attr_setscope(&attribute, PTHREAD_SCOPE_SYSTEM);
+
+ /* create a hdf5 file using H5F_ACC_TRUNC access,
+ * default file creation plist and default file
+ * access plist
+ */
+ cancel_file = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+
+ pthread_create(&childthread, &attribute, tts_cancel_thread, NULL);
+
+ tts_cancel_barrier();
+ pthread_cancel(childthread);
+
+ dataset = H5Dopen(cancel_file, DATASETNAME);
+ H5Dread(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
+ &buffer);
+
+ if (buffer == 11) {
+ /* do nothing */
+ } else {
+ fprintf(stderr,
+ "operation unsuccessful with value at %d instead of 11\n",
+ buffer);
+ }
+
+ H5Dclose(dataset);
+ H5Fclose(cancel_file);
+}
+
+void *tts_cancel_thread(void *arg) {
+
+ int datavalue;
+ int *buffer;
+ hid_t dataspace, datatype, dataset;
+ hsize_t dimsf[1]; /* dataset dimensions */
+
+ cancel_cleanup_t *cleanup_structure;
+
+ /* define dataspace for 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(cancel_file, DATASETNAME, datatype, dataspace,
+ H5P_DEFAULT);
+
+ /* If thread is cancelled, make cleanup call */
+ cleanup_structure = (cancel_cleanup_t*)malloc(sizeof(cancel_cleanup_t));
+ cleanup_structure->dataset = dataset;
+ cleanup_structure->datatype = datatype;
+ cleanup_structure->dataspace = dataspace;
+ pthread_cleanup_push(cancellation_cleanup, cleanup_structure);
+
+ datavalue = 1;
+ H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
+ &datavalue);
+
+ buffer = malloc(sizeof(int));
+ H5Dread(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
+ buffer);
+ H5Diterate(buffer, H5T_NATIVE_INT, dataspace, tts_cancel_callback,
+ &dataset);
+
+ sleep(3);
+
+ datavalue = 100;
+ H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
+ &datavalue);
+ H5Dclose(dataset);
+ H5Tclose(datatype);
+ H5Sclose(dataspace);
+
+ /* required by pthreads. the argument 0 pops the stack but does not
+ execute the cleanup routine.
+ */
+ pthread_cleanup_pop(0);
+
+ return (NULL);
+}
+
+herr_t tts_cancel_callback(void *elem, hid_t type_id, hsize_t ndim,
+ hssize_t *point, void *operator_data) {
+ int value = *(int *)elem;
+ hid_t dataset = *(hid_t *)operator_data;
+
+ tts_cancel_barrier();
+ sleep(3);
+
+ if (value != 1) {
+ fprintf(stderr,"Error! Element value should be 1 and not %d\n", value);
+ return(-1);
+ }
+
+ value += 10;
+ H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
+ &value);
+
+ return (0);
+}
+
+/* need to perform the dataset, datatype and dataspace close that was
+ never performed because of thread cancellation
+*/
+void cancellation_cleanup(void *arg) {
+ cancel_cleanup_t *cleanup_structure = (cancel_cleanup_t *)arg;
+ H5Dclose(cleanup_structure->dataset);
+ H5Tclose(cleanup_structure->datatype);
+ H5Sclose(cleanup_structure->dataspace);
+ /* retained for debugging */
+ /* printf("cancellation noted, cleaning up ... \n"); */
+}
+
+/*
+ artificial (and specific to this test) barrier to keep track of whether
+ both the main and child threads have reached a point in the program.
+*/
+void tts_cancel_barrier() {
+
+ static int count = 2;
+
+ pthread_mutex_lock(&mutex);
+ if (count != 1) {
+ count--;
+ pthread_cond_wait(&cond, &mutex);
+ } else {
+ pthread_cond_signal(&cond);
+ }
+ pthread_mutex_unlock(&mutex);
+
+}
+
+void cleanup_cancel() {
+ H5close();
+}
+#endif /*H5_HAVE_THREADSAFE*/