//TestSyn的解决方法即将线程执行时锁住，不允许其他的线程操作 //锁定的意义在于在使用线程的过程中不会让其它线程使用，互斥锁-//TestSyn solutions implementation is about to lock the thread, the thread does not allow other operations// lock the significance of the use of threads in the process will not let