! This file created from test/mpi/f77/rma/baseattrwinf.f with f77tof90
! -*- Mode: Fortran; -*- 
!
!  (C) 2003 by Argonne National Laboratory.
!      See COPYRIGHT in top-level directory.
!
      program main
      use mpi
      integer (kind=MPI_ADDRESS_KIND) extrastate, valin, valout, val

      logical flag
      integer ierr, errs
      integer base(1024)
      integer disp
      integer win
      integer commsize
      errs = 0
      
      call mpi_init( ierr )
      call mpi_comm_size( MPI_COMM_WORLD, commsize, ierr )

! Create a window; then extract the values 
      n    = 1024
      disp = 4
      call MPI_Win_create( base, n, disp, MPI_INFO_NULL, MPI_COMM_WORLD,  &
      &  win, ierr )
!
! In order to check the base, we need an address-of function.
! We use MPI_Get_address, even though that isn't strictly correct
      call MPI_Win_get_attr( win, MPI_WIN_BASE, valout, flag, ierr )
      if (.not. flag) then
         errs = errs + 1
         print *, "Could not get WIN_BASE"
!
! There is no easy way to get the actual value of base to compare 
! against.  MPI_Address gives a value relative to MPI_BOTTOM, which 
! is different from 0 in Fortran (unless you can define MPI_BOTTOM
! as something like %pointer(0)).
!      else
!
!C For this Fortran 77 version, we use the older MPI_Address function
!         call MPI_Address( base, baseadd, ierr )
!         if (valout .ne. baseadd) then
!           errs = errs + 1
!           print *, "Got incorrect value for WIN_BASE (", valout, 
!     &             ", should be ", baseadd, ")"
!         endif
      endif

      call MPI_Win_get_attr( win, MPI_WIN_SIZE, valout, flag, ierr )
      if (.not. flag) then
         errs = errs + 1
         print *, "Could not get WIN_SIZE"
      else
        if (valout .ne. n) then
            errs = errs + 1
            print *, "Got incorrect value for WIN_SIZE (", valout,  &
      &        ", should be ", n, ")"
         endif
      endif

      call MPI_Win_get_attr( win, MPI_WIN_DISP_UNIT, valout, flag, ierr)
      if (.not. flag) then
         errs = errs + 1
         print *, "Could not get WIN_DISP_UNIT"
      else
         if (valout .ne. disp) then
            errs = errs + 1
            print *, "Got wrong value for WIN_DISP_UNIT (", valout,  &
      &               ", should be ", disp, ")"
         endif
      endif

      ! Check for errors
      if (errs .eq. 0) then
         print *, " No Errors"
      else
         print *, " Found ", errs, " errors"
      endif

      call MPI_Win_free( win, ierr )

      call MPI_Finalize( ierr )

      end
