Small optimisation to CacheListDescriptor

1 files changed, 9 insertions, 0 deletions

diff --git a/synapse/util/async.py b/synapse/util/async.py

index 0d6f48e2d8..40be7fe7e3 100644
--- a/synapse/util/async.py
+++ b/synapse/util/async.py
@@ -102,6 +102,15 @@ class ObservableDeferred(object):
     def observers(self):
         return self._observers
 
+    def has_called(self):
+        return self._result is not None
+
+    def has_succeeded(self):
+        return self._result is not None and self._result[0] is True
+
+    def get_result(self):
+        return self._result[1]
+
     def __getattr__(self, name):
         return getattr(self._deferred, name)