C# Thread挂起线程和恢复线程

前言

众所周知，Thread类中的挂起线程和恢复线程微软已标记过时，因为可能会造成问题

Resume()   恢复当前线程

已过时。 Resumes a thread that has been suspended.

Suspend()   挂起当前线程

已过时。 挂起线程，或者如果线程已挂起，则不起作用。

其他方式实现

一、ThreadWorkItem

  class ThreadWorkItem
    {
        public int ThreadManagerId { get; set; }
        public Thread Thread { get; set; }
        public string ThreadName { get; set; }
        public bool Flag { get; set; }
        public ManualResetEvent ManualResetEvent { get; set; }

    }

 

二、C# Thread挂起线程和恢复线程的实现的两种方式

 

方式1：使用变量开关控制挂起线程和恢复线程，具体代码如下

    public class Program
    {
        //线程工作集合
        private static List<ThreadWorkItem> Works = new List<ThreadWorkItem>();

        //方式1：使用变量开关控制挂起线程和恢复线程

        private static void Main(string[] args)
        {
            ThreadWorkItem wItem = null;
            Thread t = null;

            var threadNum = 2;


            for (int i = 0; i < threadNum; i++)
            {

                t = new Thread(o=>
                {
                    var w = o as ThreadWorkItem;
                    if (w == null) return;
                    while (true)
                    {
                        if (!w.Flag)
                        {
                            Console.WriteLine("我是线程：" + Thread.CurrentThread.Name);
                            Thread.Sleep(1000);
                            continue;
                        }
                        //避免CPU空转
                        Thread.Sleep(5000);

                    }

                });
                //$ C#6.0语法糖
                t.Name = $"Hello I'am 线程：{i}-{t.ManagedThreadId}";
                wItem = new ThreadWorkItem
                {
                    Flag = false,
                    Thread = t,
                    ThreadManagerId = t.ManagedThreadId,
                    ThreadName = t.Name
                };
                Works.Add(wItem);
                t.Start(Works[i]);
            }

            //5秒后允许一个等待的线程继续。当前允许的是线程1
            Thread.Sleep(5000);
            Works[0].Flag = true;
            Console.WriteLine($"thread-{Works[0].ThreadName} is 暂停");



            //5秒后允许一个等待的线程继续。当前允许的是线程0,1
            Thread.Sleep(5000);
            Works[0].Flag = false;
            Console.WriteLine($"thread-{Works[0].ThreadName} is 恢复");


        }
    }

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