202     def _trylock(lockfile):  argument
206     def _unlock(lockfile):  argument
397     def _trylock(lockfile, exclusive):  argument
401     def _unlock(lockfile):  argument
409     def _close_handle(lockfile):  argument
417     def _trylock(lockfile):  argument
422     def _unlock(lockfile):  argument
431     def _trylock(lockfile):  argument
435     def _unlock(lockfile):  argument
444     def _trylock(lockfile, exclusive):  argument
463     def _unlock(lockfile):  argument
474     def _close_handle(lockfile):  argument
483     def _trylock(lockfile, exclusive):  argument
500     def _unlock(lockfile):  argument
508     def _close_handle(lockfile):  argument