Refactor asyncio locking system for Python 3.7 support. Ref https://github.com/GNS3/gns3-gui/issues/2566 Ref https://github.com/GNS3/gns3-gui/issues/2568

gns3server/controller/compute.py

@@ -27,7 +27,7 @@ from operator import itemgetter
 
 from ..utils import parse_version
 from ..utils.images import list_images
-from ..utils.asyncio import locked_coroutine, asyncio_ensure_future
+from ..utils.asyncio import locking, asyncio_ensure_future
 from ..controller.controller_error import ControllerError
 from ..version import __version__, __version_info__
 
@@ -400,7 +400,8 @@ class Compute:
         except aiohttp.web.HTTPConflict:
             pass
 
-    @locked_coroutine
+    @locking
+    @asyncio.coroutine
     def connect(self):
         """
         Check if remote server is accessible

gns3server/controller/gns3vm/__init__.py

@@ -21,7 +21,7 @@ import asyncio
 import aiohttp
 import ipaddress
 
-from ...utils.asyncio import locked_coroutine, asyncio_ensure_future
+from ...utils.asyncio import locking, asyncio_ensure_future
 from .vmware_gns3_vm import VMwareGNS3VM
 from .virtualbox_gns3_vm import VirtualBoxGNS3VM
 from .remote_gns3_vm import RemoteGNS3VM
@@ -265,7 +265,8 @@ class GNS3VM:
             except GNS3VMError as e:
                 log.warn(str(e))
 
-    @locked_coroutine
+    @locking
+    @asyncio.coroutine
     def start(self):
         """
         Start the GNS3 VM
@@ -339,7 +340,8 @@ class GNS3VM:
         except aiohttp.web.HTTPConflict as e:
             log.warning("Could not check the VM is in the same subnet as the local server: {}".format(e.text))
 
-    @locked_coroutine
+    @locking
+    @asyncio.coroutine
     def _suspend(self):
         """
         Suspend the GNS3 VM
@@ -351,7 +353,8 @@ class GNS3VM:
             log.info("Suspend the GNS3 VM")
             yield from engine.suspend()
 
-    @locked_coroutine
+    @locking
+    @asyncio.coroutine
     def _stop(self):
         """
         Stop the GNS3 VM

gns3server/controller/project.py

@@ -36,7 +36,7 @@ from .udp_link import UDPLink
 from ..config import Config
 from ..utils.path import check_path_allowed, get_default_project_directory
 from ..utils.asyncio.pool import Pool
-from ..utils.asyncio import locked_coroutine
+from ..utils.asyncio import locking
 from ..utils.asyncio import wait_run_in_executor
 from ..utils.asyncio import asyncio_ensure_future
 from .export_project import export_project
@@ -525,7 +525,8 @@ class Project:
             self.dump()
         return node
 
-    @locked_coroutine
+    @locking
+    @asyncio.coroutine
     def __delete_node_links(self, node):
         """
         Delete all link connected to this node.
@@ -783,7 +784,8 @@ class Project:
     def _topology_file(self):
         return os.path.join(self.path, self._filename)
 
-    @locked_coroutine
+    @locking
+    @asyncio.coroutine
     def open(self):
         """
         Load topology elements