! This file created from 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

! Include addsize defines asize as an address-sized integer

      integer (kind=MPI_ADDRESS_KIND) asize

      errs = 0

      call mtest_init( ierr )

      call mpi_comm_size( MPI_COMM_WORLD, commsize, ierr )

! Create a window; then extract the values 

      asize    = 1024

      disp = 4

      call MPI_Win_create( base, asize, 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. asize) then

            errs = errs + 1

            print *, "Got incorrect value for WIN_SIZE (", valout,  &

      &        ", should be ", asize, ")"

         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

      call MPI_Win_free( win, ierr )

      call mtest_finalize( errs )

      end