emmm
这个SpinWait
中文是自旋等待的意思。
所谓自旋,就是自己追自己影子,周伯通的左右手互博,不好听就是放屁自己追着玩,小狗转圈咬自己的尾巴
SpinWait是一个结构体,并不是一个类。
书上给的是SpinOnce
就是执行一个自旋
说白的也就是等待一次
class Program { static void Main(string[] args) { var t1 = new Thread(UserModeWait); var t2 = new Thread(HybridSpinWait); WriteLine("Running user mode waiting"); t1.Start(); Thread.Sleep(20); _isCompleted = true; Thread.Sleep(TimeSpan.FromSeconds(1)); _isCompleted = false; WriteLine("Running hybrid SpinWait construct waiting"); t2.Start(); Thread.Sleep(TimeSpan.FromSeconds(15)); _isCompleted = true; } static volatile bool _isCompleted = false; static void UserModeWait() { while (!_isCompleted) { Write("."); } WriteLine(); WriteLine("Waiting is complete"); } static void HybridSpinWait() { var w = new SpinWait(); while (!_isCompleted) { w.SpinOnce(); //WriteLine(w.NextSpinWillYield); } WriteLine("Waiting is complete"); } }