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- import unittest
- import sys
- import gc
-
- import time
- import weakref
- import greenlet
- import threading
-
-
- class ArgRefcountTests(unittest.TestCase):
- def test_arg_refs(self):
- args = ('a', 'b', 'c')
- refcount_before = sys.getrefcount(args)
- g = greenlet.greenlet(
- lambda *args: greenlet.getcurrent().parent.switch(*args))
- for i in range(100):
- g.switch(*args)
- self.assertEqual(sys.getrefcount(args), refcount_before)
-
- def test_kwarg_refs(self):
- kwargs = {}
- g = greenlet.greenlet(
- lambda **kwargs: greenlet.getcurrent().parent.switch(**kwargs))
- for i in range(100):
- g.switch(**kwargs)
- self.assertEqual(sys.getrefcount(kwargs), 2)
-
- if greenlet.GREENLET_USE_GC:
- # These only work with greenlet gc support
-
- def recycle_threads(self):
- # By introducing a thread that does sleep we allow other threads,
- # that have triggered their __block condition, but did not have a
- # chance to deallocate their thread state yet, to finally do so.
- # The way it works is by requiring a GIL switch (different thread),
- # which does a GIL release (sleep), which might do a GIL switch
- # to finished threads and allow them to clean up.
- def worker():
- time.sleep(0.001)
- t = threading.Thread(target=worker)
- t.start()
- time.sleep(0.001)
- t.join()
-
- def test_threaded_leak(self):
- gg = []
- def worker():
- # only main greenlet present
- gg.append(weakref.ref(greenlet.getcurrent()))
- for i in range(2):
- t = threading.Thread(target=worker)
- t.start()
- t.join()
- del t
- greenlet.getcurrent() # update ts_current
- self.recycle_threads()
- greenlet.getcurrent() # update ts_current
- gc.collect()
- greenlet.getcurrent() # update ts_current
- for g in gg:
- self.assertTrue(g() is None)
-
- def test_threaded_adv_leak(self):
- gg = []
- def worker():
- # main and additional *finished* greenlets
- ll = greenlet.getcurrent().ll = []
- def additional():
- ll.append(greenlet.getcurrent())
- for i in range(2):
- greenlet.greenlet(additional).switch()
- gg.append(weakref.ref(greenlet.getcurrent()))
- for i in range(2):
- t = threading.Thread(target=worker)
- t.start()
- t.join()
- del t
- greenlet.getcurrent() # update ts_current
- self.recycle_threads()
- greenlet.getcurrent() # update ts_current
- gc.collect()
- greenlet.getcurrent() # update ts_current
- for g in gg:
- self.assertTrue(g() is None)
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