torch_tensor_get_device_index Function

  function torch_tensor_get_device_index(tensor) result(device_index)
    use, intrinsic :: iso_c_binding, only : c_int
    type(torch_tensor), intent(in) :: tensor  !! Input tensor
    integer(c_int) :: device_index  !! Device index of tensor

    interface
      function torch_tensor_get_device_index_c(tensor) result(device_index) &
          bind(c, name = 'torch_tensor_get_device_index')
        use, intrinsic :: iso_c_binding, only : c_int, c_ptr
        type(c_ptr), value, intent(in) :: tensor
        integer(c_int) :: device_index
      end function torch_tensor_get_device_index_c
    end interface

    device_index = torch_tensor_get_device_index_c(tensor%p)
  end function torch_tensor_get_device_index