interface

  subroutine Createtree_(tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    type(c_ptr), intent(out) :: tree_ctx
  end subroutine

  subroutine DeleteTree(tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    type(c_ptr), intent(in) :: tree_ctx
  end subroutine

  subroutine GetTree(node_coord, node_depth, node_ghost, node_leaf, Nnodes, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    type(c_ptr), intent(out) :: node_coord ! real*8, dimension(Nnode*3)
    type(c_ptr), intent(out) :: node_depth ! integer*1, dimension(Nnode)
    type(c_ptr), intent(out) :: node_ghost ! integer*1, dimension(Nnode)
    type(c_ptr), intent(out) :: node_leaf  ! integer*1, dimension(Nnode)
    integer*4  , intent(out) :: Nnodes
    type(c_ptr), intent(in)  :: tree_ctx
  end subroutine

  subroutine UpdateRefinement(pt_coord, Npt, max_pts, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    real*8     , intent(in) :: pt_coord(*)
    integer*4  , intent(in) :: Npt
    integer*4  , intent(in) :: max_pts
    type(c_ptr), intent(in) :: tree_ctx
  end subroutine

  subroutine AddData(data_name, node_data, Ndata, cnt, Ncnt, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    character  , intent(in) :: data_name(*)
    real*8     , intent(in) :: node_data(*)
    integer*4  , intent(in) :: Ndata
    integer*4  , intent(in) :: cnt(*)
    integer*4  , intent(in) :: Ncnt
    type(c_ptr), intent(in) :: tree_ctx
  end subroutine

  subroutine GetData(node_data, Ndata, cnt, Ncnt, data_name, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    type(c_ptr), intent(out) :: node_data  ! real*8   , dimension(Ndata)
    integer*4  , intent(out) :: Ndata
    type(c_ptr), intent(out) :: cnt        ! integer*4, dimension(Ncnt)
    integer*4  , intent(out) :: Ncnt
    character  , intent(in)  :: data_name(*)
    type(c_ptr), intent(in)  :: tree_ctx
  end subroutine

  subroutine DeleteData(data_name, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    character  , intent(in) :: data_name(*)
    type(c_ptr), intent(in) :: tree_ctx
  end subroutine

  subroutine WriteTreeVTK(fname, show_ghost, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    character  , intent(in) :: fname(*)
    logical    , intent(in) :: show_ghost
    type(c_ptr), intent(in) :: tree_ctx
  end subroutine


  subroutine AddParticles(pt_name, coord, Npt, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    character  , intent(in) :: pt_name
    real*8     , intent(in) :: coord(*)
    integer*4  , intent(in) :: Npt
    type(c_ptr), intent(in) :: tree_ctx
  end subroutine

  subroutine AddParticleData(data_name, pt_name, pt_data, Ndata, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    character  , intent(in) :: data_name(*)
    character  , intent(in) :: pt_name(*)
    real*8     , intent(in) :: pt_data(*)
    integer*4  , intent(in) :: Ndata
    type(c_ptr), intent(in) :: tree_ctx
  end subroutine

  subroutine GetParticleData(pt_data, N, data_name, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    type(c_ptr), intent(out) :: pt_data    ! real*8, dimension(N)
    integer*4  , intent(out) :: N
    character  , intent(in)  :: data_name(*)
    type(c_ptr), intent(in)  :: tree_ctx
  end subroutine

  subroutine DeleteParticleData(data_name, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    character  , intent(in) :: data_name
    type(c_ptr), intent(in) :: tree_ctx
  end subroutine

  subroutine WriteParticleVTK(fname, data_name, show_ghost, tree_ctx)
    use, intrinsic :: ISO_C_BINDING
    character  , intent(in) :: fname(*)
    character  , intent(in) :: data_name(*)
    logical    , intent(in) :: show_ghost
    type(c_ptr), intent(in) :: tree_ctx
  end subroutine

end interface