gistfile1.diff

diff --git a/structlog/threadlocal.py b/structlog/threadlocal.py
index 1b2eeb3..80de726 100644
--- a/structlog/threadlocal.py
+++ b/structlog/threadlocal.py
@@ -17,11 +17,24 @@ Primitives to keep context global but thread local.
 """
 
 import contextlib
-import threading
 import uuid
 
 from structlog._config import BoundLoggerLazyProxy
 
+try:
+    from greenlet import getcurrent
+except ImportError:
+    from threading import local as threadlocal
+else:
+    class threadlocal:
+        def __init__(self):
+            self.__dict__["_prefix"] = str(id(self))
+        def __getattr__(self, name):
+            return getattr(getcurrent(), self._prefix + name)
+        def __setattr__(self, name, val):
+            setattr(getcurrent(), self._prefix + name, val)
+        def __delattr__(self, name):
+            delattr(getcurrent(), self._prefix + name)
 
 def wrap_dict(dict_class):
     """
@@ -35,7 +48,7 @@ def wrap_dict(dict_class):
     """
     Wrapped = type('WrappedDict-' + str(uuid.uuid4()),
                    (_ThreadLocalDictWrapper,), {})
-    Wrapped._tl = threading.local()
+    Wrapped._tl = threadlocal()
     Wrapped._dict_class = dict_class
     return Wrapped