Stiphle\Storage\DoctrineCache::lock PHP Method

    public function lock($key)
    {
        $key = $key . "::LOCK";
        $start = microtime(true);
        while ($this->cache->contains($key)) {
            $passed = (microtime(true) - $start) * 1000;
            if ($passed > $this->lockWaitTimeout) {
                throw new LockWaitTimeoutException();
            }
            usleep($this->sleep);
        }
        $this->cache->save($key, true);
        return;
    }