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authorAlbert Cheng <acheng@hdfgroup.org>2005-04-05 21:03:08 (GMT)
committerAlbert Cheng <acheng@hdfgroup.org>2005-04-05 21:03:08 (GMT)
commit976e2784cb853a978db96407bae3e9fcae85dc67 (patch)
tree1487b2c793868309e5dec2542d726e3747b73f2b /fortran
parentb0f1b2f21c2da6e3b2f3d56d2e8a4b5c547789c3 (diff)
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[svn-r10552] Purpose:
Added a new fortran parallel example program. Platforms tested: Tested in heping using pp mode. Misc. update:
Diffstat (limited to 'fortran')
-rw-r--r--fortran/examples/ph5example.f90124
1 files changed, 124 insertions, 0 deletions
diff --git a/fortran/examples/ph5example.f90 b/fortran/examples/ph5example.f90
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+! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+! Copyright by the Board of Trustees of the University of Illinois. *
+! 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
+! access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
+! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+!
+! Fortran parallel example. Copied from Tutorial's example program of
+! dataset.f90.
+
+ PROGRAM DATASET
+
+ USE HDF5 ! This module contains all necessary modules
+
+ IMPLICIT NONE
+
+ INCLUDE 'mpif.h'
+ CHARACTER(LEN=10), PARAMETER :: filename = "sds.h5" ! File name
+ CHARACTER(LEN=8), PARAMETER :: dsetname = "IntArray" ! Dataset name
+
+ INTEGER(HID_T) :: file_id ! File identifier
+ INTEGER(HID_T) :: dset_id ! Dataset identifier
+ INTEGER(HID_T) :: filespace ! Dataspace identifier in file
+ INTEGER(HID_T) :: plist_id ! Property list identifier
+
+ INTEGER(HSIZE_T), DIMENSION(2) :: dimsf = (/5,8/) ! Dataset dimensions.
+! INTEGER, DIMENSION(7) :: dimsfi = (/5,8,0,0,0,0,0/)
+! INTEGER(HSIZE_T), DIMENSION(2) :: dimsfi = (/5,8/)
+ INTEGER(HSIZE_T), DIMENSION(2) :: dimsfi
+
+ INTEGER, ALLOCATABLE :: data(:,:) ! Data to write
+ INTEGER :: rank = 2 ! Dataset rank
+
+ INTEGER :: error, error_n ! Error flags
+ INTEGER :: i, j
+ !
+ ! MPI definitions and calls.
+ !
+ INTEGER :: mpierror ! MPI error flag
+ INTEGER :: comm, info
+ INTEGER :: mpi_size, mpi_rank
+ comm = MPI_COMM_WORLD
+ info = MPI_INFO_NULL
+ CALL MPI_INIT(mpierror)
+ CALL MPI_COMM_SIZE(comm, mpi_size, mpierror)
+ CALL MPI_COMM_RANK(comm, mpi_rank, mpierror)
+ !
+ ! Initialize data buffer with trivial data.
+ !
+ ALLOCATE ( data(dimsf(1),dimsf(2)))
+ do i = 1, dimsf(2)
+ do j = 1, dimsf(1)
+ data(j,i) = j - 1 + (i-1)*dimsf(1)
+ enddo
+ enddo
+ !
+ ! Initialize FORTRAN interface
+ !
+ CALL h5open_f(error)
+
+ !
+ ! Setup file access property list with parallel I/O access.
+ !
+ CALL h5pcreate_f(H5P_FILE_ACCESS_F, plist_id, error)
+ CALL h5pset_fapl_mpio_f(plist_id, comm, info, error)
+
+ !
+ ! Create the file collectively.
+ !
+ CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error, access_prp = plist_id)
+ CALL h5pclose_f(plist_id, error)
+ !
+ ! Create the data space for the dataset.
+ !
+ CALL h5screate_simple_f(rank, dimsf, filespace, error)
+
+ !
+ ! Create the dataset with default properties.
+ !
+ CALL h5dcreate_f(file_id, dsetname, H5T_NATIVE_INTEGER, filespace, &
+ dset_id, error)
+ !
+ ! Create property list for collective dataset write
+ !
+ CALL h5pcreate_f(H5P_DATASET_XFER_F, plist_id, error)
+ CALL h5pset_dxpl_mpio_f(plist_id, H5FD_MPIO_COLLECTIVE_F, error)
+ !
+ ! For independent write use
+ ! CALL h5pset_dxpl_mpio_f(plist_id, H5FD_MPIO_INDEPENDENT_F, error)
+ !
+
+ !
+ ! Write the dataset collectively.
+ !
+ CALL h5dwrite_f(dset_id, H5T_NATIVE_INTEGER, data, dimsfi, error, &
+ xfer_prp = plist_id)
+ !
+ ! Deallocate data buffer.
+ !
+ DEALLOCATE(data)
+
+ !
+ ! Close resources.
+ !
+ CALL h5sclose_f(filespace, error)
+ CALL h5dclose_f(dset_id, error)
+ CALL h5pclose_f(plist_id, error)
+ CALL h5fclose_f(file_id, error)
+
+ !
+ ! Close FORTRAN interface
+ !
+ CALL h5close_f(error)
+
+ CALL MPI_FINALIZE(mpierror)
+
+ END PROGRAM DATASET