Method push

tenseal/cpp/utils/queue.h:26–32

     **/
    template <class... Args>
    void push(Args&&... args) {
        {
            std::scoped_lock lock{mutex_};
            queue_.emplace(std::forward<Args>(args)...);
        }
        ready_.notify_one();
    }
    /**
     * pop() waits until an item is available in the queue, pops it out and
     *assigns it to the "out" parameter.