!!  Copyright (C)  Stichting Deltares, 2012-2017.
!!
!!  This program is free software: you can redistribute it and/or modify
!!  it under the terms of the GNU General Public License version 3,
!!  as published by the Free Software Foundation.
!!
!!  This program 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 General Public License
!!  along with this program. If not, see <http://www.gnu.org/licenses/>.
!!
!!  contact: delft3d.support@deltares.nl
!!  Stichting Deltares
!!  P.O. Box 177
!!  2600 MH Delft, The Netherlands
!!
!!  All indications and logos of, and references to registered trademarks
!!  of Stichting Deltares remain the property of Stichting Deltares. All
!!  rights reserved.

!> @file
!!    Run two instances of the same computation in parallel.
!!    One has a timestep that is half that of the other.
!!

!> Main program steering the computation
program delwaq2_two_instances

    use delwaq2_data

    implicit none

    include 'actions.inc'

    character(len=100), dimension(1) :: argv
    integer                          :: argc
    integer                          :: action
    integer                          :: i
    integer                          :: status

    type(delwaq_data), dimension(2)  :: dlwqd

    !
    ! Turn off the timers
    !
    dlwqd%set_timer = .true.
!    dlwqd%islibrary = .true.

    !
    ! Initialise both instances
    !
    argc = 0
    argv = ' '

    action = ACTION_INITIALISATION
    call dlwqmain( action, argc, argv, dlwqd(1) )
    call dlwqmain( action, argc, argv, dlwqd(2) )

    !
    ! Set the timestep directly for the second instance
    !
    !dlwqd(2)%in(3) = dlwqd(2)%in(3) / 2

    !
    ! Set a few steps
    !
    action = ACTION_SINGLESTEP
    do i = 1,2000
        call dlwqmain( action, argc, argv, dlwqd(1) )

        call dlwqmain( action, argc, argv, dlwqd(2) )
        !call dlwqmain( action, argc, argv, dlwqd(2) )
    enddo

    !
    ! Finish the computation
    !
    action = ACTION_FINALISATION
    call dlwqmain( action, argc, argv, dlwqd(1) )
    call dlwqmain( action, argc, argv, dlwqd(2) )

end program delwaq2_two_instances