modify: 排他锁

2026-08-27 09:42:21 +08:00
parent 9f7f71be7c
commit 0bdee195c1
7 changed files with 159 additions and 2 deletions
@@ -47,6 +47,10 @@ class DiskBackend(CacheBackend):
    def set(self, key, value, expire: float | None = None) -> None:
        self._cache.set(key, value, expire=expire)

+    def set_nx(self, key, value, expire: float | None = None) -> bool:
+        # diskcache.add 仅在 key 不存在时写入，返回是否成功（SET NX 语义）且进程安全
+        return bool(self._cache.add(key, value, expire=expire))
+
    def touch(self, key, expire: float | None = None) -> bool:
        return self._cache.touch(key, expire=expire)