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/********************************************************************
*
* Testing thread safety in dataset creation in the HDF5 library
* -------------------------------------------------------------
*
* Set of tests to run multiple threads so that each creates a different
* dataset. This is likely to cause race-conditions if run in a non
* threadsafe environment.
*
* Temporary files generated:
* ttsafe.h5
*
* HDF5 APIs exercised in thread:
* H5Screate_simple, H5Tcopy, H5Tset_order, H5Dcreate, H5Dwrite, H5Dclose,
* H5Tclose, H5Sclose.
*
* Created: Apr 28 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_LENGTH 10
#define NUM_THREAD 16
void *tts_dcreate_creator(void *);
/*
**********************************************************************
* Thread safe test - multiple dataset creation
**********************************************************************
*/
void tts_dcreate(void) {
/* Pthread definitions
*/
pthread_t threads[NUM_THREAD];
/* HDF5 data definitions
*/
hid_t file, dataset, datatype;
int datavalue;
int i;
typedef struct thread_info {
int id;
hid_t file;
char *dsetname;
} thread_info;
thread_info *thread_out;
char *dsetname[NUM_THREAD];
pthread_attr_t attribute;
/* set pthread attribute to perform global scheduling */
pthread_attr_init(&attribute);
pthread_attr_setscope(&attribute, PTHREAD_SCOPE_SYSTEM);
/* set individual dataset names (rather than generated the names
automatically)
*/
for (i=0;i<NUM_THREAD;i++) {
dsetname[i] = (char *)malloc(sizeof(char)*DATASETNAME_LENGTH);
}
dsetname[0] = "zero";
dsetname[1] = "one";
dsetname[2] = "two";
dsetname[3] = "three";
dsetname[4] = "four";
dsetname[5] = "five";
dsetname[6] = "six";
dsetname[7] = "seven";
dsetname[8] = "eight";
dsetname[9] = "nine";
dsetname[10] = "ten";
dsetname[11] = "eleven";
dsetname[12] = "twelve";
dsetname[13] = "thirteen";
dsetname[14] = "fourteen";
dsetname[15] = "fifteen";
/* 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);
/* simultaneously create a large number of datasets within the file
*/
for (i=0;i<NUM_THREAD;i++) {
thread_out = (thread_info *)malloc(sizeof(thread_info));
thread_out->id = i;
thread_out->file = file;
thread_out->dsetname = dsetname[i];
pthread_create(&threads[i],NULL,tts_dcreate_creator,thread_out);
}
for (i=0;i<NUM_THREAD;i++) {
pthread_join(threads[i],NULL);
}
/* compare data to see if it is written correctly
*/
/* define datatype for the data using native little endian integers
*/
datatype = H5Tcopy(H5T_NATIVE_INT);
for (i=0;i<NUM_THREAD;i++) {
if ((dataset = H5Dopen(file,dsetname[i])) < 0) {
fprintf(stderr,"Dataset name not found - test failed\n");
H5Fclose(file);
return;
} else {
H5Dread(dataset, datatype, H5S_ALL, H5S_ALL, H5P_DEFAULT, &datavalue);
if (datavalue != i) {
fprintf(stderr,
"Wrong value read %d for dataset name %s - test failed\n",
datavalue, dsetname[i]);
H5Dclose(dataset);
H5Fclose(file);
return;
}
H5Dclose(dataset);
}
}
/* close remaining resources
*/
H5Fclose(file);
}
void *tts_dcreate_creator(void *thread_data) {
hid_t dataspace, datatype, dataset;
hsize_t dimsf[1]; /* dataset dimensions */
struct thread_info {
int id;
hid_t file;
char *dsetname;
} thread_in;
thread_in.dsetname = (char *)malloc(sizeof(char)*DATASETNAME_LENGTH);
thread_in = *((struct thread_info *)thread_data);
/* 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(thread_in.file, thread_in.dsetname,
datatype, dataspace,
H5P_DEFAULT);
/* initialize data for dataset and write value to dataset
*/
H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL,
H5P_DEFAULT, &thread_in.id);
/* close dataset, datatype and dataspace resources
*/
H5Dclose(dataset);
H5Tclose(datatype);
H5Sclose(dataspace);
return NULL;
}
void cleanup_dcreate(void) {
H5close();
}
#endif /*H5_HAVE_THREADSAFE*/
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