diff options
Diffstat (limited to 'synapse/util/caches/lrucache.py')
| -rw-r--r-- | synapse/util/caches/lrucache.py | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/synapse/util/caches/lrucache.py b/synapse/util/caches/lrucache.py index 60bb6ff642..20c8e2d9f5 100644 --- a/synapse/util/caches/lrucache.py +++ b/synapse/util/caches/lrucache.py @@ -57,12 +57,14 @@ def enumerate_leaves(node, depth): class _Node: __slots__ = ["prev_node", "next_node", "key", "value", "callbacks"] - def __init__(self, prev_node, next_node, key, value, callbacks=set()): + def __init__( + self, prev_node, next_node, key, value, callbacks: Optional[set] = None + ): self.prev_node = prev_node self.next_node = next_node self.key = key self.value = value - self.callbacks = callbacks + self.callbacks = callbacks or set() class LruCache(Generic[KT, VT]): @@ -176,10 +178,10 @@ class LruCache(Generic[KT, VT]): self.len = synchronized(cache_len) - def add_node(key, value, callbacks=set()): + def add_node(key, value, callbacks: Optional[set] = None): prev_node = list_root next_node = prev_node.next_node - node = _Node(prev_node, next_node, key, value, callbacks) + node = _Node(prev_node, next_node, key, value, callbacks or set()) prev_node.next_node = node next_node.prev_node = node cache[key] = node @@ -237,7 +239,7 @@ class LruCache(Generic[KT, VT]): def cache_get( key: KT, default: Optional[T] = None, - callbacks: Iterable[Callable[[], None]] = [], + callbacks: Iterable[Callable[[], None]] = (), update_metrics: bool = True, ): node = cache.get(key, None) @@ -253,7 +255,7 @@ class LruCache(Generic[KT, VT]): return default @synchronized - def cache_set(key: KT, value: VT, callbacks: Iterable[Callable[[], None]] = []): + def cache_set(key: KT, value: VT, callbacks: Iterable[Callable[[], None]] = ()): node = cache.get(key, None) if node is not None: # We sometimes store large objects, e.g. dicts, which cause |