| from typing import Callable | |
| from ray.rllib.utils.annotations import OldAPIStack | |
| def with_lock(func: Callable) -> Callable: | |
| """Use as decorator (@withlock) around object methods that need locking. | |
| Note: The object must have a self._lock = threading.Lock() property. | |
| Locking thus works on the object level (no two locked methods of the same | |
| object can be called asynchronously). | |
| Args: | |
| func: The function to decorate/wrap. | |
| Returns: | |
| The wrapped (object-level locked) function. | |
| """ | |
| def wrapper(self, *a, **k): | |
| try: | |
| with self._lock: | |
| return func(self, *a, **k) | |
| except AttributeError as e: | |
| if "has no attribute '_lock'" in e.args[0]: | |
| raise AttributeError( | |
| "Object {} must have a `self._lock` property (assigned " | |
| "to a threading.RLock() object in its " | |
| "constructor)!".format(self) | |
| ) | |
| raise e | |
| return wrapper | |