subroutine mpii_end


      !
      ! local variables
      !
      integer :: ierr


      call mpi_finalize( ierr )


    end subroutine mpii_end

    subroutine mpii_init


      !
      ! local variables
      !
      integer :: ierr


      call mpi_init( ierr )
      call mpi_comm_size( mpi_comm_world, nprocs, ierr )
      call mpi_comm_rank( mpi_comm_world, myrank, ierr )
      write(*,*) "nprocs", nprocs
      write(*,*) "myrank", myrank

    end subroutine mpii_init

    subroutine mpii_irecv_dble_2d( idep, im, jm, buf, ireq )


      integer, intent(in ) :: idep
      integer, intent(in ) :: im, jm
      real(8)    , intent(out) :: buf( im, jm )
      integer, intent(out) :: ireq


      !
      ! local variables
      !
      integer :: ierr
      integer :: isize


      isize = size( buf )

      call mpi_irecv( buf, isize, mpi_double_precision, idep, 1, mpi_comm_world, ireq, ierr )


    end subroutine mpii_irecv_dble_2d

    subroutine mpii_irecv_dble_3d( idep, im, jm, km, buf, ireq )


      integer, intent(in ) :: idep
      integer, intent(in ) :: im, jm, km
      real(8)    , intent(out) :: buf( im, jm, km )
      integer, intent(out) :: ireq


      !
      ! local variables
      !
      integer :: ierr
      integer :: isize


      isize = size( buf )

      call mpi_irecv( buf, isize, mpi_double_precision, idep, 1, mpi_comm_world, ireq, ierr )


    end subroutine mpii_irecv_dble_3d

    subroutine mpii_isend_dble_2d( idest, im, jm, buf, ireq )


      integer, intent(in ) :: idest
      integer, intent(in ) :: im, jm
      real(8)    , intent(in ) :: buf( im, jm )
      integer, intent(out) :: ireq


      !
      ! local variables
      !
      integer :: ierr
      integer :: isize


      isize = size( buf )

      call mpi_isend( buf, isize, mpi_double_precision, idest, 1, mpi_comm_world, ireq, ierr )


    end subroutine mpii_isend_dble_2d

    subroutine mpii_isend_dble_3d( idest, im, jm, km, buf, ireq )


      integer, intent(in ) :: idest
      integer, intent(in ) :: im, jm, km
      real(8)    , intent(in ) :: buf( im, jm, km )
      integer, intent(out) :: ireq


      !
      ! local variables
      !
      integer :: ierr
      integer :: isize


      isize = size( buf )

      call mpi_isend( buf, isize, mpi_double_precision, idest, 1, mpi_comm_world, ireq, ierr )


    end subroutine mpii_isend_dble_3d

    subroutine mpii_wait( ireq )


      integer, intent(in) :: ireq


      !
      ! local variables
      !
      integer :: ierr
      integer :: istatus( MPI_STATUS_SIZE )


      call mpi_wait( ireq, istatus, ierr )


    end subroutine mpii_wait