devel/py-fasteners 0.20p0 OpenBSD

The fasteners module includes the following:

Locking decorator

Helpful locked decorator (that acquires instance objects lock(s) and
acquires on method entry and releases on method exit).

Reader-writer locks

Multiple readers (at the same time).  Single writers (blocking any
readers).  Helpful read\_locked and write\_locked decorators.

Inter-process locks

Single writer using file based locking (these automatically release
on process exit, even if \_\_release\_\_ or \_\_exit\_\_ is never called).
Helpful interprocess\_locked decorator.

Generic helpers

A try\_lock helper context manager that will attempt to acquire a
given lock and provide back whether the attempt passed or failed (if
it passes, then further code in the context manager will be ran with
the lock acquired).