How to use the fasteners._utils.StopWatch function in fasteners

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github harlowja / fasteners / fasteners / process_lock.py View on Github external
acquisition)
        :type max_delay: int/float
        :param timeout: an optional timeout (limits how long blocking
                        will occur for)
        :type timeout: int/float
        :returns: whether or not the acquisition succeeded
        :rtype: bool
        """
        if delay < 0:
            raise ValueError("Delay must be greater than or equal to zero")
        if timeout is not None and timeout < 0:
            raise ValueError("Timeout must be greater than or equal to zero")
        if delay >= max_delay:
            max_delay = delay
        self._do_open()
        watch = _utils.StopWatch(duration=timeout)
        r = _utils.Retry(delay, max_delay,
                         sleep_func=self.sleep_func, watch=watch)
        with watch:
            gotten = r(self._try_acquire, blocking, watch)
        if not gotten:
            self.acquired = False
            return False
        else:
            self.acquired = True
            self.logger.log(_utils.BLATHER,
                            "Acquired file lock `%s` after waiting %0.3fs [%s"
                            " attempts were required]", self.path,
                            watch.elapsed(), r.attempts)
            return True