Remove `skip-string-normalization` in Python formatter config

[babeltrace.git] / src / bindings / python / bt2 / bt2 / graph.py

diff --git a/src/bindings/python/bt2/bt2/graph.py b/src/bindings/python/bt2/bt2/graph.py
index b1d59700c8cc100c50d3c28809d82edf7495cf04..ed99ef079c924c1e046770ae33ee0bffd381159b 100644 (file)
--- a/src/bindings/python/bt2/bt2/graph.py
+++ b/src/bindings/python/bt2/bt2/graph.py
@@ -1,24 +1,6 @@
-# The MIT License (MIT)
+# SPDX-License-Identifier: MIT
 #
 # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
 
 from bt2 import native_bt, object, utils
 from bt2 import interrupter as bt2_interrupter
@@ -48,15 +30,19 @@ class Graph(object._SharedObject):
         utils._check_uint64(mip_version)
 
         if mip_version > bt2.get_maximal_mip_version():
-            raise ValueError('unknown MIP version {}'.format(mip_version))
+            raise ValueError("unknown MIP version {}".format(mip_version))
 
         ptr = native_bt.graph_create(mip_version)
 
         if ptr is None:
-            raise bt2._MemoryError('cannot create graph object')
+            raise bt2._MemoryError("cannot create graph object")
 
         super().__init__(ptr)
 
+        # list of listener partials to keep a reference as long as
+        # this graph exists
+        self._listener_partials = []
+
     def add_component(
         self,
         component_class,
@@ -101,7 +87,7 @@ class Graph(object._SharedObject):
         base_cc_ptr = component_class._bt_component_class_ptr()
 
         if obj is not None and not native_bt.bt2_is_python_component_class(base_cc_ptr):
-            raise ValueError('cannot pass a Python object to a non-Python component')
+            raise ValueError("cannot pass a Python object to a non-Python component")
 
         if params is not None and not isinstance(params, (dict, bt2.MapValue)):
             raise TypeError("'params' parameter is not a 'dict' or a 'bt2.MapValue'.")
@@ -113,9 +99,11 @@ class Graph(object._SharedObject):
         status, comp_ptr = add_fn(
             self._ptr, cc_ptr, name, params_ptr, obj, logging_level
         )
-        utils._handle_func_status(status, 'cannot add component to graph')
+        utils._handle_func_status(status, "cannot add component to graph")
         assert comp_ptr
-        return bt2_component._create_component_from_const_ptr(comp_ptr, cc_type)
+        return bt2_component._create_component_from_const_ptr_and_get_ref(
+            comp_ptr, cc_type
+        )
 
     def connect_ports(self, upstream_port, downstream_port):
         utils._check_type(upstream_port, bt2_port._OutputPortConst)
@@ -123,9 +111,9 @@ class Graph(object._SharedObject):
         status, conn_ptr = native_bt.graph_connect_ports(
             self._ptr, upstream_port._ptr, downstream_port._ptr
         )
-        utils._handle_func_status(status, 'cannot connect component ports within graph')
+        utils._handle_func_status(status, "cannot connect component ports within graph")
         assert conn_ptr
-        return bt2_connection._ConnectionConst._create_from_ptr(conn_ptr)
+        return bt2_connection._ConnectionConst._create_from_ptr_and_get_ref(conn_ptr)
 
     def add_port_added_listener(self, listener):
         if not callable(listener):
@@ -138,19 +126,24 @@ class Graph(object._SharedObject):
 
         listener_ids = fn(self._ptr, listener_from_native)
         if listener_ids is None:
-            raise bt2._Error('cannot add listener to graph object')
+            raise bt2._Error("cannot add listener to graph object")
+
+        # keep the partial's reference
+        self._listener_partials.append(listener_from_native)
 
     def run_once(self):
         status = native_bt.graph_run_once(self._ptr)
-        utils._handle_func_status(status, 'graph object could not run once')
+        utils._handle_func_status(status, "graph object could not run once")
 
     def run(self):
         status = native_bt.graph_run(self._ptr)
-        utils._handle_func_status(status, 'graph object stopped running')
+        utils._handle_func_status(status, "graph object stopped running")
 
     def add_interrupter(self, interrupter):
         utils._check_type(interrupter, bt2_interrupter.Interrupter)
         native_bt.graph_add_interrupter(self._ptr, interrupter._ptr)
 
-    def interrupt(self):
-        native_bt.graph_interrupt(self._ptr)
+    @property
+    def default_interrupter(self):
+        ptr = native_bt.graph_borrow_default_interrupter(self._ptr)
+        return bt2_interrupter.Interrupter._create_from_ptr_and_get_ref(ptr)