Fix yet another crash on shutdown.

Properly shut down ProjectView when quitting the app.

NOTES.org

@@ -218,30 +218,6 @@ Traceback (most recent call last):
     raise NotListMemberError(self.id)
 noisicaa.core.model_base.NotListMemberError: 32e1b62e20524d16a584c65311960356
 
-* Exception on shutdown									   :CRASH:
-Traceback (most recent call last):
-  File "/storage/users/pink/projects/noisicaä/noisicaa/core/process_manager.py", line 236, in start_process
-    rc = impl.main(ready_callback)
-  File "/storage/users/pink/projects/noisicaä/noisicaa/core/process_manager.py", line 386, in main
-    self.main_async(ready_callback, *args, **kwargs))
-  File "/usr/lib/python3.5/asyncio/base_events.py", line 387, in run_until_complete
-    return future.result()
-  File "/usr/lib/python3.5/asyncio/futures.py", line 274, in result
-    raise self._exception
-  File "/usr/lib/python3.5/asyncio/tasks.py", line 239, in _step
-    result = coro.send(None)
-  File "/storage/users/pink/projects/noisicaä/noisicaa/core/process_manager.py", line 409, in main_async
-    await self.cleanup()
-  File "/storage/users/pink/projects/noisicaä/noisicaa/music/project_process.py", line 225, in cleanup
-    await self.node_db.cleanup()
-  File "/storage/users/pink/projects/noisicaä/noisicaa/node_db/client.py", line 34, in cleanup
-    await self.disconnect()
-  File "/storage/users/pink/projects/noisicaä/noisicaa/node_db/client.py", line 46, in disconnect
-    await self._stub.call('END_SESSION', self._session_id)
-  File "/storage/users/pink/projects/noisicaä/noisicaa/core/ipc.py", line 357, in call
-    raise ConnectionClosed
-noisicaa.core.ipc.ConnectionClosed
-
 * when changing scale_x, keep view centered on current position				      :FR:
 * clarify time handling									 :CLEANUP:
 - musical time

noisicaa/audioproc/audioproc_process.py

@@ -160,7 +160,10 @@ class AudioProcProcessMixin(object):
         self.sessions = {}
 
     async def cleanup(self):
+        logger.info("Cleaning up AudioProcProcess %s...", self.name)
+
         for session in self.sessions.values():
+            logger.info("Cleaning up session %s...", session.id)
             session.cleanup()
         self.sessions.clear()
 
@@ -169,10 +172,12 @@ class AudioProcProcessMixin(object):
             self.shm = None
 
         if self.__vm is not None:
+            logger.info("Cleaning up VM...")
             self.__vm.cleanup()
             self.__vm = None
 
         if self.__host_data is not None:
+            logger.info("Cleaning up HostData...")
             self.__host_data.cleanup()
             self.__host_data = None
 

noisicaa/core/process_manager.py

@@ -464,6 +464,11 @@ class ProcessManager(object):
 
                 rc = impl.main(child_connection)
 
+                for thread in threading.enumerate():
+                    if thread.ident == threading.get_ident():
+                        continue
+                    logger.warning("Left over thread %s (%d)", thread.name, thread.ident)
+
             except SystemExit as exc:
                 rc = exc.code
             except:  # pylint: disable=bare-except
@@ -658,8 +663,12 @@ class ProcessImpl(object):
             return self.event_loop.run_until_complete(
                 self.main_async(child_connection, *args, **kwargs))
         finally:
+            logger.info("Closing event loop...")
             self.event_loop.stop()
+            self.event_loop.run_until_complete(
+                asyncio.gather(*asyncio.Task.all_tasks(self.event_loop)))
             self.event_loop.close()
+            logger.info("Event loop closed.")
 
     async def main_async(self, child_connection, *args, **kwargs):
         self.manager = ManagerStub(self.event_loop, self.manager_address)
@@ -686,8 +695,10 @@ class ProcessImpl(object):
                         raise
 
                     finally:
+                        logger.info("Closing child connection...")
                         child_connection_handler.cleanup()
                         child_connection.close()
+                        logger.info("Child connection closed.")
 
                 finally:
                     await self.cleanup()

noisicaa/ui/editor_window.py

@@ -127,7 +127,7 @@ class EditorWindow(ui_base.CommonMixin, QtWidgets.QMainWindow):
 
         while self._project_tabs.count() > 0:
             view = self._project_tabs.widget(0)
-            view.close()
+            await view.cleanup()
             self._project_tabs.removeTab(0)
         self._settings_dialog.close()
         self.close()
@@ -443,15 +443,6 @@ class EditorWindow(ui_base.CommonMixin, QtWidgets.QMainWindow):
 
     def closeEvent(self, event):
         logger.info("CloseEvent received")
-
-        for idx in range(self._project_tabs.count()):
-            view = self._project_tabs.widget(idx)
-            closed = view.close()
-            if not closed:
-                event.ignore()
-                return
-            self._project_tabs.removeTab(idx)
-
         event.accept()
         self.app.quit()