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# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
import gc
import threading
from cryptography.hazmat.bindings._rust import FixedPool
class TestFixedPool:
def test_basic(self):
c = 0
events = []
def create():
nonlocal c
c += 1
events.append(("create", c))
return c
def destroy(c):
events.append(("destroy", c))
pool = FixedPool(create, destroy)
assert events == [("create", 1)]
with pool.acquire() as c:
assert c == 1
assert events == [("create", 1)]
with pool.acquire() as c:
assert c == 2
assert events == [("create", 1), ("create", 2)]
assert events == [("create", 1), ("create", 2), ("destroy", 2)]
assert events == [("create", 1), ("create", 2), ("destroy", 2)]
del pool
gc.collect()
gc.collect()
gc.collect()
assert events == [
("create", 1),
("create", 2),
("destroy", 2),
("destroy", 1),
]
def test_thread_stress(self):
def create():
return None
def destroy(c):
pass
pool = FixedPool(create, destroy)
def thread_fn():
with pool.acquire():
pass
threads = []
for i in range(1024):
t = threading.Thread(target=thread_fn)
t.start()
threads.append(t)
for t in threads:
t.join()
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