user_listener(component, port)
-def _graph_ports_connected_listener_from_native(
- user_listener,
- upstream_component_ptr,
- upstream_component_type,
- upstream_port_ptr,
- downstream_component_ptr,
- downstream_component_type,
- downstream_port_ptr,
-):
- upstream_component = bt2_component._create_component_from_const_ptr_and_get_ref(
- upstream_component_ptr, upstream_component_type
- )
- upstream_port = bt2_port._create_from_const_ptr_and_get_ref(
- upstream_port_ptr, native_bt.PORT_TYPE_OUTPUT
- )
- downstream_component = bt2_component._create_component_from_const_ptr_and_get_ref(
- downstream_component_ptr, downstream_component_type
- )
- downstream_port = bt2_port._create_from_const_ptr_and_get_ref(
- downstream_port_ptr, native_bt.PORT_TYPE_INPUT
- )
- user_listener(
- upstream_component, upstream_port, downstream_component, downstream_port
- )
-
-
class Graph(object._SharedObject):
_get_ref = staticmethod(native_bt.graph_get_ref)
_put_ref = staticmethod(native_bt.graph_put_ref)
if listener_ids is None:
raise bt2._Error('cannot add listener to graph object')
- def add_ports_connected_listener(self, listener):
- if not callable(listener):
- raise TypeError("'listener' parameter is not callable")
-
- fn = native_bt.bt2_graph_add_ports_connected_listener
- listener_from_native = functools.partial(
- _graph_ports_connected_listener_from_native, listener
- )
-
- listener_ids = fn(self._ptr, listener_from_native)
- if listener_ids is None:
- raise bt2._Error('cannot add listener to graph object')
-
def run_once(self):
status = native_bt.graph_run_once(self._ptr)
utils._handle_func_status(status, 'graph object could not run once')