说明：  基于C++标准模板块STL的list容器开发的线程安全的队列，实现队列的基本功能，如入队，出队，可以设置队列最大值，可以用于线程同步
(Thread-safe queue based on the standard mode C++ plate STL list container development, to achieve the basic functions of the queue, such as into the team, a team, you can set the maximum value of the queue can be used for thread synchronization)