diff options
Diffstat (limited to 'ryu/services/protocols/bgp/utils/internable.py')
| -rw-r--r-- | ryu/services/protocols/bgp/utils/internable.py | 35 |
1 files changed, 19 insertions, 16 deletions
diff --git a/ryu/services/protocols/bgp/utils/internable.py b/ryu/services/protocols/bgp/utils/internable.py index 9f5e8d95..2029bf0d 100644 --- a/ryu/services/protocols/bgp/utils/internable.py +++ b/ryu/services/protocols/bgp/utils/internable.py @@ -14,9 +14,6 @@ # limitations under the License. import weakref -from six.moves import intern - -dict_name = intern('_internable_dict') # @@ -40,6 +37,12 @@ class Internable(object): Internable to work. """ + _internable_stats = None + _internable_dict = None + + def __init__(self): + self._interned = False + class Stats(object): def __init__(self): @@ -55,17 +58,17 @@ class Internable(object): return str(self.d) @classmethod - def _internable_init(kls): + def _internable_init(cls): # Objects to be interned are held as keys in a dictionary that # only holds weak references to keys. As a result, when the # last reference to an interned object goes away, the object # will be removed from the dictionary. - kls._internable_dict = weakref.WeakKeyDictionary() - kls._internable_stats = Internable.Stats() + cls._internable_dict = weakref.WeakKeyDictionary() + cls._internable_stats = Internable.Stats() @classmethod - def intern_stats(kls): - return kls._internable_stats + def intern_stats(cls): + return cls._internable_stats def intern(self): """Returns either itself or a canonical copy of itself.""" @@ -78,26 +81,26 @@ class Internable(object): # Got to find or create an interned object identical to this # one. Auto-initialize the class if need be. # - kls = self.__class__ + cls = self.__class__ - if not hasattr(kls, dict_name): - kls._internable_init() + if not cls._internable_dict: + cls._internable_init() - obj = kls._internable_dict.get(self) + obj = cls._internable_dict.get(self) if (obj): # Found an interned copy. - kls._internable_stats.incr('found') + cls._internable_stats.incr('found') return obj # Create an interned copy. Take care to only keep a weak # reference to the object itself. def object_collected(obj): - kls._internable_stats.incr('collected') + cls._internable_stats.incr('collected') # print("Object %s garbage collected" % obj) pass ref = weakref.ref(self, object_collected) - kls._internable_dict[self] = ref + cls._internable_dict[self] = ref self._interned = True - kls._internable_stats.incr('inserted') + cls._internable_stats.incr('inserted') return self |