Code import

venv/lib/python2.7/site-packages/eventlet/support/stacklesss.py

@@ -0,0 +1,84 @@
+"""
+Support for using stackless python.  Broken and riddled with print statements
+at the moment.  Please fix it!
+"""
+
+import sys
+import types
+
+import stackless
+
+caller = None
+coro_args = {}
+tasklet_to_greenlet = {}
+
+
+def getcurrent():
+    return tasklet_to_greenlet[stackless.getcurrent()]
+
+
+class FirstSwitch(object):
+    def __init__(self, gr):
+        self.gr = gr
+
+    def __call__(self, *args, **kw):
+        # print("first call", args, kw)
+        gr = self.gr
+        del gr.switch
+        run, gr.run = gr.run, None
+        t = stackless.tasklet(run)
+        gr.t = t
+        tasklet_to_greenlet[t] = gr
+        t.setup(*args, **kw)
+        t.run()
+
+
+class greenlet(object):
+    def __init__(self, run=None, parent=None):
+        self.dead = False
+        if parent is None:
+            parent = getcurrent()
+
+        self.parent = parent
+        if run is not None:
+            self.run = run
+
+        self.switch = FirstSwitch(self)
+
+    def switch(self, *args):
+        # print("switch", args)
+        global caller
+        caller = stackless.getcurrent()
+        coro_args[self] = args
+        self.t.insert()
+        stackless.schedule()
+        if caller is not self.t:
+            caller.remove()
+        rval = coro_args[self]
+        return rval
+
+    def run(self):
+        pass
+
+    def __bool__(self):
+        return self.run is None and not self.dead
+
+
+class GreenletExit(Exception):
+    pass
+
+
+def emulate():
+    module = types.ModuleType('greenlet')
+    sys.modules['greenlet'] = module
+    module.greenlet = greenlet
+    module.getcurrent = getcurrent
+    module.GreenletExit = GreenletExit
+
+    caller = stackless.getcurrent()
+    tasklet_to_greenlet[caller] = None
+    main_coro = greenlet()
+    tasklet_to_greenlet[caller] = main_coro
+    main_coro.t = caller
+    del main_coro.switch  # It's already running
+    coro_args[main_coro] = None