功能是利用互斥体来保护同时访问的共享资源，包含创建者创建两个线程来访问共享值，解除程序释放对对象的引用，在两个线程终止之前可暂停主调者-Function is to use a mutex to protect simultaneous access to shared resources.Includes the creation of two threads to access a shared value, lifting procedures to release references