+ def _bt_can_seek_ns_from_origin_from_native(self, ns_from_origin):
+ # Here, we mimic the behavior of the C API:
+ #
+ # - If the iterator has a _user_can_seek_ns_from_origin method,
+ # call it and use its return value.
+ # - Otherwise, if there is a `_user_seek_ns_from_origin` method,
+ # we presume it's possible.
+ # - Otherwise, check if we can seek to beginning (which allows us to
+ # seek to beginning and then fast forward - aka auto-seek).
+ if hasattr(self, '_user_can_seek_ns_from_origin'):
+ can_seek_ns_from_origin = self._user_can_seek_ns_from_origin(ns_from_origin)
+ utils._check_bool(can_seek_ns_from_origin)
+ return can_seek_ns_from_origin
+ elif hasattr(self, '_user_seek_ns_from_origin'):
+ return True
+ else:
+ return self._bt_can_seek_beginning_from_native()
+
+ def _bt_seek_ns_from_origin_from_native(self, ns_from_origin):
+ self._user_seek_ns_from_origin(ns_from_origin)
+
+ def _create_input_port_message_iterator(self, input_port):
+ utils._check_type(input_port, bt2_port._UserComponentInputPort)
+
+ status, msg_iter_ptr = native_bt.bt2_self_component_port_input_message_iterator_create_from_message_iterator(
+ self._bt_ptr, input_port._ptr
+ )
+ utils._handle_func_status(status, 'cannot create message iterator object')
+ assert msg_iter_ptr is not None
+
+ return _UserComponentInputPortMessageIterator(msg_iter_ptr)
+
+ def _create_event_message(self, event_class, parent, default_clock_snapshot=None):
+ utils._check_type(event_class, bt2_event_class._EventClass)