# HG changeset patch
# User Sigurd Meldgaard <stm@daimi.au.dk>
# Date 1267022783 -3600
# Node ID 71ebbf22dd7892e177decab73aaa05680d012d8b
# Parent  c837fa9ff823fa81ad098f0fd36b1f9ea274c135
Added the missing defer_wrapper file

diff -r c837fa9ff823 -r 71ebbf22dd78 pysmcl/defer_wrapper.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pysmcl/defer_wrapper.py	Wed Feb 24 15:46:23 2010 +0100
@@ -0,0 +1,32 @@
+# -*- test-case-name: twisted.test.test_defer -*-
+#
+# Copyright (c) 2001-2007 Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Support for results that aren't immediately available.
+
+Maintainer: Glyph Lefkowitz
+"""
+
+from __future__ import nested_scopes, generators
+
+from twisted.python.util import unsignedID, mergeFunctionMetadata
+from twisted.internet.defer import *
+from twisted.internet.defer import _inlineCallbacks
+import types
+
+
+def inlineCallbacks(f):
+    def unwindGenerator(*args, **kwargs):
+        deferred = Deferred()
+        try:
+            result = f(*args, **kwargs)
+        except Exception, e:
+            deferred.errback(e)
+            return deferred
+        if isinstance(result, types.GeneratorType):
+            return _inlineCallbacks(None, result, deferred)
+        deferred.callback(result)
+        return deferred
+    return mergeFunctionMetadata(f, unwindGenerator)