Function waitPop

src/UtilsCtrl/ThreadPool/Queue/UAtomicQueue.h:80–86

* 阻塞式等待弹出 * @return */

     * @return
     */
    std::unique_ptr<T> waitPop() {
        CGRAPH_UNIQUE_LOCK lk(mutex_);
        cv_.wait(lk, [this] { return !queue_.empty(); });
        std::unique_ptr<T> result = std::move(queue_.front());
        queue_.pop();
        return result;
    }


    /**