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/*
* Example of how to use Flexible Parallel HDF5.
*
* Author:
* Bill Wendling (wendling@ncsa.uiuc.edu)
* 20. February 2003
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mpi.h"
#ifdef H5_HAVE_FPHDF5
#include "hdf5.h"
#include "H5public.h"
#include "H5FPpublic.h"
MPI_Comm SAP_Comm;
MPI_Comm SAP_Barrier_Comm;
void err(const char *func, int mrc);
void create_file(int);
void create_file(int sap_rank)
{
int my_rank, mrc;
hid_t fid, acc_tpl, sid, dataset;
if ((mrc = MPI_Comm_rank(SAP_Comm, &my_rank)) != MPI_SUCCESS) {
err("H5FPinit", mrc);
return;
}
fprintf(stderr, "%d: Creating file foo.h5\n", my_rank);
if ((acc_tpl = H5Pcreate(H5P_FILE_ACCESS)) < 0) {
fprintf(stderr, "%d: Failed to create access property list\n", my_rank);
goto done;
}
fprintf(stderr, "%d: Created access property list\n", my_rank);
if (H5Pset_fapl_fphdf5(acc_tpl, SAP_Comm, SAP_Barrier_Comm,
MPI_INFO_NULL, (unsigned)sap_rank) < 0) {
fprintf(stderr, "%d: Failed to set fapl\n", my_rank);
goto done;
}
fprintf(stderr, "%d: Set access property list\n", my_rank);
if ((fid = H5Fcreate("/tmp/foo.h5", H5F_ACC_TRUNC, H5P_DEFAULT, acc_tpl)) < 0) {
fprintf(stderr, "%d: Failed to create file foo.h5\n", my_rank);
goto done;
}
fprintf(stderr, "%d: Created file foo.h5\n", my_rank);
fprintf(stderr, "%d: SAP_Barrier_Comm==%d\n", my_rank, SAP_Barrier_Comm);
MPI_Barrier(SAP_Barrier_Comm);
fflush(NULL);
fflush(NULL);
fflush(NULL);
sleep(3);
goto done;
if (my_rank == 0) {
/* Create a dataset in the file */
hsize_t dims[2];
dims[0] = 3;
dims[1] = 5;
if ((sid = H5Screate_simple(2, dims, NULL)) < 0) {
fprintf(stderr, "%d: Failed to create simple dataspace\n", my_rank);
goto done;
}
if ((dataset = H5Dcreate(fid, "/dataset", H5T_NATIVE_INT, sid, H5P_DEFAULT)) < 0) {
fprintf(stderr, "%d: Failed to create simple dataset\n", my_rank);
goto done;
}
fprintf(stderr, "%d: Created dataset ``/dataset''\n", my_rank);
H5Sclose(sid);
H5Dclose(dataset);
}
fprintf(stderr, "%d: SAP_Barrier_Comm==%d\n", my_rank, SAP_Barrier_Comm);
MPI_Barrier(SAP_Barrier_Comm);
if (my_rank == 2) {
/* See if dataset is there */
if ((dataset = H5Dopen(fid, "/dataset")) < 0) {
fprintf(stderr, "%d: Failed to open dataset\n", my_rank);
goto done;
}
fprintf(stderr, "%d: Opened dataset ``/dataset''\n", my_rank);
H5Dclose(dataset);
}
fprintf(stderr, "%d: SAP_Barrier_Comm==%d\n", my_rank, SAP_Barrier_Comm);
MPI_Barrier(SAP_Barrier_Comm);
done:
fprintf(stderr, "----------------------------\n");
fflush(stderr);
if (H5Pclose(acc_tpl) < 0)
fprintf(stderr, "%d: Failed to close access property list\n", my_rank);
else
fprintf(stderr, "%d: Closed access property list\n", my_rank);
if (H5Fclose(fid) < 0)
fprintf(stderr, "%d: Failed to close file\n", my_rank);
else
fprintf(stderr, "%d: Closed file\n", my_rank);
fprintf(stderr, "%d: leaving create_file\n", my_rank);
MPI_Barrier(SAP_Barrier_Comm);
fflush(NULL);
fflush(NULL);
fflush(NULL);
fflush(NULL);
fflush(NULL);
sleep(5);
}
int main(int argc, char *argv[])
{
int ret = EXIT_SUCCESS, mrc;
int my_rank;
int sap_rank = 1;
MPI_Init(&argc, &argv);
mrc = H5FPinit(MPI_COMM_WORLD, sap_rank, &SAP_Comm, &SAP_Barrier_Comm);
if (mrc < 0) {
err("H5FPinit", mrc);
ret = EXIT_FAILURE;
goto fail;
}
if ((mrc = MPI_Comm_rank(SAP_Comm, &my_rank)) != MPI_SUCCESS) {
err("H5FPinit", mrc);
ret = EXIT_FAILURE;
goto fail;
}
fprintf(stderr, "%d: Initialized FPHDF5\n", my_rank);
if (my_rank != sap_rank) {
create_file(sap_rank);
MPI_Barrier(SAP_Barrier_Comm);
}
fail:
H5FPfinalize();
fprintf(stderr, "%d: H5FP finalized\n", my_rank);
H5close();
fprintf(stderr, "%d: HDF5 Closed\n", my_rank);
MPI_Finalize();
fprintf(stderr, "%d: MPI finalized\n", my_rank);
return ret;
}
void err(const char *func, int mrc)
{
fprintf(stderr, "error: %s: ", func);
switch (mrc) {
case MPI_ERR_COMM:
fprintf(stderr, "invalid communicator\n");
break;
case MPI_ERR_COUNT:
fprintf(stderr, "invalid count argument\n");
break;
case MPI_ERR_TYPE:
fprintf(stderr, "invalid datatype argument\n");
break;
case MPI_ERR_TAG:
fprintf(stderr, "invalid tag argument\n");
break;
case MPI_ERR_RANK:
fprintf(stderr, "invalid source or destination rank\n");
break;
case MPI_ERR_INTERN:
fprintf(stderr, "internal MPI-IO error\n");
break;
case MPI_ERR_REQUEST:
fprintf(stderr, "invalid MPI_Request\n");
break;
case MPI_ERR_ARG:
fprintf(stderr, "invalid argument\n");
break;
default:
fprintf(stderr, "unknown MPI-IO error\n");
break;
}
}
#else
/* dummy program since H5_HAVE_PARALLE is not configured in */
int
main(int argc, char *argv[])
{
int my_rank;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
if (my_rank==0){
printf("No t_fphdf5 Test because FPHDF5 is not configured in\n");
}
MPI_Finalize();
return(0);
}
#endif
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