/usr/lib/python2.7/dist-packages/eventlet/support/stacklesss.py is in python-eventlet 0.20.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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
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