lock.py 文件源码

def release(self):
        '''
        Release a previously acquired lock.
        '''
        assert self._locked
        assert self._lock_file

        # Note that this actually leaves the lock file around, but deleting it without a race
        # is not trivial.
        fcntl.flock(self._lock_file, fcntl.LOCK_UN)
        verbose('Lock "%s" released.' % self._lock_file_path)

        self._locked = False

        self._lock_file.close()
        self._lock_file = None