Try to acquire the file lock. :param timeout: maximum wait time for acquiring the lock, ``None`` means use the default :

Acquire a shared read lock. See :meth:`SoftReadWriteLock.acquire_read` for reentrancy / upgrade / fork semantics. The blocking work

Acquire the lock. :returns: the lock object

Release the lock, reconciling a release failure with any body failure per :attr:`context_error_policy`. :param exc_type: the excepti

Force-release so a dropped reference never leaks a held lock.

Release on deletion; safe to call during GC even when no event loop is running.

Acquire the lock. :returns: the lock object

Sync context manager entry is not supported because lock acquisition is a coroutine.

Sync context manager exit is not supported because lock release is a coroutine.

Create a new lock object. :param lock_file: path to the file :param timeout: default timeout when acquiring the lock, in sec

Create a lease. :param lease_duration: seconds of marker staleness after which a contender may take the claim. Every contender

Create a new lock object. :param lock_file: path to the file :param timeout: default timeout when acquiring the lock, in sec

Give each lock subclass its own singleton registry and lock.