C# 實現java中 wiat/notify機制

最近在學習java,看到wiat/notify機制實現線程通信，由於平時工作用的C#，趕緊用C#方式實現一個demo。

Java 代碼：

import java.util.ArrayList;
import java.util.List;

public class MyList {

    private static List list = new ArrayList();

    public static void add() {
        list.add("anyString");
    }

    public static int size() {
        return list.size();
    }

}


import extlist.MyList;

public class ThreadA extends Thread {

    private Object lock;

    public ThreadA(Object lock) {
        super();
        this.lock = lock;
    }

    @Override
    public void run() {
        try {
            synchronized (lock) {
                if (MyList.size() != 5) {
                    System.out.println("wait begin "
                            + System.currentTimeMillis());
                    lock.wait();
                    System.out.println("wait end  "
                            + System.currentTimeMillis());
                }
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}


import extlist.MyList;

public class ThreadB extends Thread {
    private Object lock;

    public ThreadB(Object lock) {
        super();
        this.lock = lock;
    }

    @Override
    public void run() {
        try {
            synchronized (lock) {
                for (int i = 0; i < 10; i++) {
                    MyList.add();
                    if (MyList.size() == 5) {
                        lock.notify();
                        System.out.println("已發出通知！");
                    }
                    System.out.println("添加了" + (i + 1) + "個元素!");
                    Thread.sleep(1000);
                }
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}


import extthread.ThreadA;
import extthread.ThreadB;

public class Run {

    public static void main(String[] args) {

        try {
            Object lock = new Object();

            ThreadA a = new ThreadA(lock);
            a.start();

            Thread.sleep(50);

            ThreadB b = new ThreadB(lock);
            b.start();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }

}

C# 代碼：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;

namespace ConsoleApplication1
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            var obj = new object();
            var thread1 = new Thread(Test1);
            thread1.Start(obj);

            Thread.Sleep(50);

            var thread2 = new Thread(Test2);
            thread2.Start(obj);
        }

        public static void Test1(object obj)
        {
            try
            {
                Monitor.Enter(obj);
                if (MyList.Size() != 5)
                {
                    Console.WriteLine("wait begin" + DateTime.Now);
                    Monitor.Wait(obj);
                    Console.WriteLine("wait end" + DateTime.Now);
                }
                Monitor.Exit(obj);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        public static void Test2(object obj)
        {
            try
            {
                Monitor.Enter(obj);
                for (int i = 0; i < 10; i++)
                {
                    MyList.Add();
                    if (MyList.Size() == 5)
                    {
                        Monitor.Pulse(obj);
                        Console.WriteLine("已發出通知！" + DateTime.Now);
                    }
                    Console.WriteLine("添加了(" + (i + 1) + ")個元素");
                    Thread.Sleep(1000);
                }
                Monitor.Exit(obj);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }
    }

    public class MyList
    {
        private static readonly List<string> list = new List<string>();

        public static void Add()
        {
            list.Add("anyString");
        }

        public static int Size()
        {
            return list.Count();
        }
    }
}