| 281 | """ |
| 282 | |
| 283 | def __init__(self, lock=None): |
| 284 | if lock is None: |
| 285 | lock = RLock() |
| 286 | self._lock = lock |
| 287 | # Export the lock's acquire(), release(), and locked() methods |
| 288 | self.acquire = lock.acquire |
| 289 | self.release = lock.release |
| 290 | self.locked = lock.locked |
| 291 | # If the lock defines _release_save() and/or _acquire_restore(), |
| 292 | # these override the default implementations (which just call |
| 293 | # release() and acquire() on the lock). Ditto for _is_owned(). |
| 294 | if hasattr(lock, '_release_save'): |
| 295 | self._release_save = lock._release_save |
| 296 | if hasattr(lock, '_acquire_restore'): |
| 297 | self._acquire_restore = lock._acquire_restore |
| 298 | if hasattr(lock, '_is_owned'): |
| 299 | self._is_owned = lock._is_owned |
| 300 | self._waiters = _deque() |
| 301 | |
| 302 | def _at_fork_reinit(self): |
| 303 | self._lock._at_fork_reinit() |