mirror of https://gitlab.com/QEF/q-e.git
70 lines
2.0 KiB
Fortran
70 lines
2.0 KiB
Fortran
!
|
|
! Copyright (C) 2002-2006 Quantum ESPRESSO group
|
|
! This file is distributed under the terms of the
|
|
! GNU General Public License. See the file `License'
|
|
! in the root directory of the present distribution,
|
|
! or http://www.gnu.org/copyleft/gpl.txt .
|
|
!
|
|
!
|
|
!----------------------------------------------------------------------------
|
|
MODULE image_io_routines
|
|
!----------------------------------------------------------------------------
|
|
!
|
|
! ... This module contains all subroutines used for I/O in image
|
|
! ... parallelization
|
|
!
|
|
! ... from the orignal path_io Written by Carlo Sbraccia ( 2003-2006 )
|
|
!
|
|
USE kinds, ONLY : DP
|
|
USE io_global, ONLY : meta_ionode, meta_ionode_id
|
|
!
|
|
IMPLICIT NONE
|
|
!
|
|
PRIVATE
|
|
!
|
|
PUBLIC :: io_image_start, io_image_stop
|
|
!
|
|
CONTAINS
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
SUBROUTINE io_image_start()
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
USE io_global, ONLY : ionode, ionode_id
|
|
USE mp_global, ONLY : me_image, root_image
|
|
!
|
|
IMPLICIT NONE
|
|
!
|
|
!
|
|
! ... the I/O node is set again according to the number of parallel
|
|
! ... images that have been required: for each parallel image there
|
|
! ... is only one node that does I/O
|
|
!
|
|
ionode = ( me_image == root_image )
|
|
ionode_id = root_image
|
|
!
|
|
RETURN
|
|
!
|
|
END SUBROUTINE io_image_start
|
|
!
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
SUBROUTINE io_image_stop()
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
USE io_global, ONLY : io_global_start
|
|
USE mp_global, ONLY : mpime, root
|
|
!
|
|
IMPLICIT NONE
|
|
!
|
|
!
|
|
! ... the original I/O node is set again
|
|
!
|
|
CALL io_global_start( mpime, root )
|
|
!
|
|
RETURN
|
|
!
|
|
END SUBROUTINE io_image_stop
|
|
!
|
|
END MODULE image_io_routines
|