def test_parallel_threads():
# Check that ReentrancyLock serializes work in parallel threads.
#
# The test is not fully deterministic, and may succeed falsely if
# the timings go wrong.
lock = ReentrancyLock("failure")
failflag = [False]
exceptions_raised = []
def worker(k):
try:
with lock:
assert_(not failflag[0])
failflag[0] = True
time.sleep(0.1 * k)
assert_(failflag[0])
failflag[0] = False
except Exception:
exceptions_raised.append(traceback.format_exc(2))
threads = [
threads_new.Thread(target=lambda k=k: worker(k)) for k in range(3)
]
for t in threads:
t.start()
for t in threads:
t.join()
exceptions_raised = "\n".join(exceptions_raised)
assert_(not exceptions_raised, exceptions_raised)
def test_parallel_threads():
results = []
lock = ReentrancyLock("failure")
def worker(k):
with lock:
time.sleep(0.01 * (3 - k))
results.append(k)
threads = [
threading.Thread(target=lambda k=k: worker(k)) for k in range(3)
]
for t in threads:
t.start()
for t in threads:
t.join()
assert_equal(results, sorted(results))