这是书上的代码，支持阻塞与非阻塞模型且线程安全的环形缓冲的设计与实现---环形缓冲，攻克高级缓冲技术的关键，供大家参考-This is the code book to support non-blocking model with obstructive and thread-safe Ring Buffer Design and Implementation--- ring buffer, buffer technology to capture high-level key, for your reference