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/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