Include module for desktop build

libs/pyutil/twistedutil.py

@@ -0,0 +1,25 @@
+# Copyright (c) 2005-2009 Zooko Wilcox-O'Hearn
+#  This file is part of pyutil; see README.rst for licensing terms.
+
+import warnings
+
+# from the Twisted library
+from twisted.internet import reactor
+
+# from the pyutil library
+from weakutil import WeakMethod
+
+def callLater_weakly(delay, func, *args, **kwargs):
+    """
+    Call func later, but if func is a bound method then make the reference it holds to object be a weak reference.
+
+    Therefore, if this scheduled event is a bound method and it is the only thing keeping the object from being garbage collected, the object will be garbage collected and the event will be cancelled.
+    """
+    warnings.warn("deprecated", DeprecationWarning)
+
+    def cleanup(weakmeth, thedeadweakref):
+        if weakmeth.callId.active():
+            weakmeth.callId.cancel()
+    weakmeth = WeakMethod(func, callback=cleanup)
+    weakmeth.callId = reactor.callLater(delay, weakmeth, *args, **kwargs)
+    return weakmeth