test_message.py 文件源码

def await_gc(obj, rc):
    """wait for refcount on an object to drop to an expected value

    Necessary because of the zero-copy gc thread,
    which can take some time to receive its DECREF message.
    """
    for i in range(50):
        # rc + 2 because of the refs in this function
        if grc(obj) <= rc + 2:
            return
        time.sleep(0.05)