def test_recursive(self):
lock = SHLock()
lock.acquire(shared=True)
lock.acquire(shared=True)
self.assertEqual(lock.is_shared, 2)
lock.release()
lock.release()
self.assertFalse(lock.is_shared)
lock.acquire(shared=False)
lock.acquire(shared=False)
self.assertEqual(lock.is_exclusive, 2)
lock.release()
lock.release()
self.assertFalse(lock.is_exclusive)
def test_recursive(self):
lock = SHLock()
lock.acquire(shared=True)
lock.acquire(shared=True)
self.assertEqual(lock.is_shared, 2)
lock.release()
lock.release()
self.assertFalse(lock.is_shared)
lock.acquire(shared=False)
lock.acquire(shared=False)
self.assertEqual(lock.is_exclusive, 2)
lock.release()
lock.release()
self.assertFalse(lock.is_exclusive)
def test_owns_locks(self):
lock = SHLock()
self.assertFalse(lock.owns_lock())
lock.acquire(shared=True)
self.assertTrue(lock.owns_lock())
lock.release()
self.assertFalse(lock.owns_lock())
lock.acquire(shared=False)
self.assertTrue(lock.owns_lock())
lock.release()
self.assertFalse(lock.owns_lock())
done = []
def test():
if not lock.owns_lock():
done.append(True)
lock.acquire()
t = Thread(target=test)
t.daemon = True
t.start()
t.join(1)
self.assertEqual(len(done), 1)
lock.release()
def test_owns_locks(self):
lock = SHLock()
self.assertFalse(lock.owns_lock())
lock.acquire(shared=True)
self.assertTrue(lock.owns_lock())
lock.release()
self.assertFalse(lock.owns_lock())
lock.acquire(shared=False)
self.assertTrue(lock.owns_lock())
lock.release()
self.assertFalse(lock.owns_lock())
done = []
def test():
if not lock.owns_lock():
done.append(True)
lock.acquire()
t = Thread(target=test)
t.daemon = True
t.start()
t.join(1)
self.assertEqual(len(done), 1)
lock.release()
def test_downgrade(self):
lock = SHLock()
lock.acquire(shared=False)
self.assertRaises(LockingError, lock.acquire, shared=True)
lock.release()
def test_acquire(self):
lock = SHLock()
def get_lock(shared):
lock.acquire(shared=shared)
time.sleep(1)
lock.release()
shared = Thread(target=get_lock, args=(True,))
shared.daemon = True
shared.start()
time.sleep(0.1)
self.assertTrue(lock.acquire(shared=True, blocking=False))
lock.release()
self.assertFalse(lock.acquire(shared=False, blocking=False))
lock.acquire(shared=False)
shared.join(1)
self.assertFalse(shared.is_alive())
lock.release()
self.assertTrue(lock.acquire(shared=False, blocking=False))
lock.release()
exclusive = Thread(target=get_lock, args=(False,))
exclusive.daemon = True
exclusive.start()
time.sleep(0.1)
self.assertFalse(lock.acquire(shared=False, blocking=False))
self.assertFalse(lock.acquire(shared=True, blocking=False))
lock.acquire(shared=True)
exclusive.join(1)
self.assertFalse(exclusive.is_alive())
lock.release()
lock.acquire(shared=False)
lock.release()
lock.acquire(shared=True)
lock.release()
self.assertFalse(lock.is_shared)
self.assertFalse(lock.is_exclusive)
def test_downgrade(self):
lock = SHLock()
lock.acquire(shared=False)
self.assertRaises(LockingError, lock.acquire, shared=True)
lock.release()
def test_acquire(self):
lock = SHLock()
def get_lock(shared):
lock.acquire(shared=shared)
time.sleep(1)
lock.release()
shared = Thread(target=get_lock, args=(True, ))
shared.daemon = True
shared.start()
time.sleep(0.1)
self.assertTrue(lock.acquire(shared=True, blocking=False))
lock.release()
self.assertFalse(lock.acquire(shared=False, blocking=False))
lock.acquire(shared=False)
shared.join(1)
self.assertFalse(shared.is_alive())
lock.release()
self.assertTrue(lock.acquire(shared=False, blocking=False))
lock.release()
exclusive = Thread(target=get_lock, args=(False, ))
exclusive.daemon = True
exclusive.start()
time.sleep(0.1)
self.assertFalse(lock.acquire(shared=False, blocking=False))
self.assertFalse(lock.acquire(shared=True, blocking=False))
lock.acquire(shared=True)
exclusive.join(1)
self.assertFalse(exclusive.is_alive())
lock.release()
lock.acquire(shared=False)
lock.release()
lock.acquire(shared=True)
lock.release()
self.assertFalse(lock.is_shared)
self.assertFalse(lock.is_exclusive)