Add stackless pypy support

eventlet/api.py

@@ -39,11 +39,17 @@ except ImportError:
         greenlet = sys.modules['greenlet']
     except ImportError:
         try:
-            import support.stackless
-            support.stackless.emulate()
+            import support.stacklesspypys
+            support.stacklesspypys.emulate()
             greenlet = sys.modules['greenlet']
         except ImportError:
-            raise ImportError("Unable to find an implementation of greenlet.")
+            try:
+                import support.stackless
+                support.stackless.emulate()
+                greenlet = sys.modules['greenlet']                
+            except ImportError:
+                raise ImportError("Unable to find an implementation of greenlet.")
+
 
 from eventlet import greenlib, tls
 

eventlet/support/stacklesspypys.py

@@ -0,0 +1,44 @@
+"""\
+@file stacklesspypysupport.py
+@author Donovan Preston
+
+Copyright (c) 2008, Linden Research, Inc.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+"""
+
+
+from stackless import greenlet
+
+
+import sys
+import types
+
+
+def emulate():
+    module = types.ModuleType('greenlet')
+    sys.modules['greenlet'] = module
+    module.greenlet = greenlet
+    module.getcurrent = greenlet.getcurrent
+    module.GreenletExit = greenlet.GreenletExit
+
+    
+
+
+
+