Fortran Example

The Fortran routine MyFRoutine is scheduled in the schedule.ccl file, doesn't use Cactus parameters, and calls another routine, in the same thorn, MyNewRoutine which does use parameters. This routine needs to be passed an integer flag as well as the standard Cactus variables. The source file should look like

#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Parameters.h"

      subroutine MyFRoutine(CCTK_ARGUMENTS)

c     I'm very cautious, so I want to declare all variables
      implicit none

      DECLARE_CCTK_ARGUMENTS

      integer flag

      flag = 1
      call MyNewRoutine(CCTK_PASS_FTOF,flag)

      return
      end

      subroutine MyNewRoutine(CCTK_ARGUMENTS,flag)

      implicit none

      DECLARE_CCTK_ARGUMENTS
      DECLARE_CCTK_PARAMETERS
      integer flag

c     Main code goes here

      return
      end