def __init__(self, use_memcache, cache_size, cache_folder, auto_reload,
cache_salt=None):
if use_memcache:
self.__memcache = CacheDict(cache_size)
else:
self.__memcache = None
self.__cache_folder = cache_folder
if not hasattr(self, 'check_source_changed'):
self.__auto_reload = False
else:
self.__auto_reload = auto_reload
self.__salt = cache_salt
self.__times = {}
self.__lock = Lock()
