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rFUTILS/src/cgetarrnd.tpl
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cgetarrnd.tpl
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!>
!> @file cgetarrnd.tpl
!>
!> @brief
!>
!> @copyright
!> Copyright (©) 2021 EPFL (Ecole Polytechnique Fédérale de Lausanne)
!> SPC (Swiss Plasma Center)
!>
!> futils is free software: you can redistribute it and/or modify it under
!> the terms of the GNU Lesser General Public License as published by the Free
!> Software Foundation, either version 3 of the License, or (at your option)
!> any later version.
!>
!> futils is distributed in the hope that it will be useful, but WITHOUT ANY
!> WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
!> FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
!>
!> You should have received a copy of the GNU Lesser General Public License
!> along with this program. If not, see <https://www.gnu.org/licenses/>.
!>
!> @authors
!> (in alphabetical order)
!> @author Trach-Minh Tran <trach-minh.tran@epfl.ch>
!>
INCLUDE "mpif.h"
INTEGER, INTENT(in) :: fid
CHARACTER(len=*), INTENT(in) :: name
INTEGER, INTENT(in) :: pardim(:)
INTEGER, INTENT(in), OPTIONAL :: garea(:)
!
INTEGER(HID_T) :: dtype, realpart, impart
INTEGER(HID_T) :: id, did, dspace_id, memspace_id, plist_id
INTEGER(HSIZE_T), DIMENSION(SIZE(SHAPE(array))) :: dims, mdims, maxdims
INTEGER(HSIZE_T), DIMENSION(SIZE(SHAPE(array))) :: offsets, locdims
INTEGER :: i, s, rank, mrank, nlocal, nglobal, pdim, ierr, mxdims, sub, topokind
LOGICAL, ALLOCATABLE :: remdim(:)
!
id = file_id(fid) ! file id
CALL mpi_topo_test(file_comm(fid), topokind, ierr)
IF( topokind .NE. MPI_CART) THEN
PRINT*, 'Cartesian Topology attached to the communicator required!'
CALL mpi_abort(MPI_COMM_WORLD, -9, ierr)
END IF
!
! Data type of array (memory)
SELECT CASE (ctype)
CASE('C')
CALL h5tcopy_f(H5T_NATIVE_REAL, dtype, ierr)
CASE('Z')
CALL h5tcopy_f(H5T_NATIVE_DOUBLE, dtype, ierr)
END SELECT
CALL mem_complex(dtype, realpart, impart)
!
! Data transfer property (default is H5FD_MPIO_INDEPENDENT_F)
CALL h5pcreate_f(H5P_DATASET_XFER_F, plist_id, ierr)
!
! Partial read/write
CALL h5pset_preserve_f(plist_id, .TRUE., ierr)
!
! Get dataset from file
CALL h5dopen_f(id, name, did, ierr)
!
! Get file dataspace
CALL h5dget_space_f(did, dspace_id, ierr)
CALL h5sget_simple_extent_dims_f(dspace_id, dims, maxdims, ierr)
rank = ierr
!
! Set memory dataspace
mdims=SHAPE(array)
mrank = SIZE(mdims)
IF( mrank .NE. rank) THEN
PRINT*, 'rank mismatch while reading ', name(1:LEN_TRIM(name))
STOP
END IF
CALL h5screate_simple_f(rank, mdims, memspace_id, ierr)
offsets = 0
IF( PRESENT(garea) ) THEN ! Exclude ghost area in memory
DO i=1,SIZE(pardim)
pdim = pardim(i)
mdims(pdim) = mdims(pdim) - 2*garea(i)
offsets(pdim) = garea(i)
END DO
END IF
CALL h5sselect_hyperslab_f(memspace_id, H5S_SELECT_SET_F, offsets, mdims, ierr)
!
! Selection on file space based on processor grid
CALL mpi_cartdim_get(file_comm(fid), mxdims, ierr)
ALLOCATE(remdim(mxdims))
locdims = dims ! The whole dataset in file
offsets = 0
DO i=1,SIZE(pardim)
pdim = pardim(i)
remdim = .FALSE.
remdim(i) = .TRUE.
CALL mpi_cart_sub(file_comm(fid), remdim, sub, ierr)
nlocal = mdims(pdim)
CALL part1d(sub, nlocal, s, nglobal)
offsets(pdim) = s
locdims(pdim) = nlocal
CALL mpi_comm_free(sub, ierr)
END DO
CALL h5sselect_hyperslab_f(dspace_id, H5S_SELECT_SET_F, offsets, locdims, ierr)
DEALLOCATE(remdim)
!!$!
!!$! Selection of memory space
!!$ offsets = 0
!!$ CALL h5sselect_hyperslab_f(memspace_id, H5S_SELECT_SET_F, offsets, mdims, ierr)
!
! Check consistency between file and memory dataspace
DO i=1,rank
IF( mdims(i) .LT. locdims(i) ) THEN
PRINT*, 'dim.', i, ' too small while reading ', &
& name(1:LEN_TRIM(name))
STOP
END IF
END DO
!
! Read dataset
CALL h5pset_dxpl_mpio_f(plist_id, H5FD_MPIO_COLLECTIVE_F, ierr)
CALL h5dread_f(did, realpart, temp1, dims, ierr, memspace_id, dspace_id, plist_id)
CALL h5dread_f(did, impart, temp2, dims, ierr, memspace_id, dspace_id, plist_id)
array = CMPLX(temp1, temp2, KIND(temp1))
!
CALL h5tclose_f(dtype, ierr)
CALL h5tclose_f(realpart, ierr)
CALL h5tclose_f(impart, ierr)
!
CALL h5pclose_f(plist_id, ierr)
CALL h5sclose_f(dspace_id, ierr)
CALL h5sclose_f(memspace_id, ierr)
CALL h5dclose_f(did, ierr)
!
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