线程安全小练习

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace WindowsFormsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        //lock只能锁定一个引用类型变量
        private static object _lock = new object();
        private void button1_Click(object sender, EventArgs e)
        {
            //new Thread(Done).Start();
            //new Thread(Done).Start();
            //new Thread(Done).Start();
            //new Thread(Done).Start();


            new Thread(Done1).Start();
            new Thread(Done1).Start();
            new Thread(Done1).Start();
            new Thread(Done1).Start();

        }
        void Done()
        {
            //lock只能锁定一个引用类型变量
            lock (_lock)
            {
                tasktest();
            }
        }
        void Done1()
        {
            Monitor.Enter(_lock);
            {
                tasktest();
            }
            Monitor.Exit(_lock);
        }



        private void tasktest()
        {
            for (int i = 0; i < 5; i++)
            {
                Thread.Sleep(1000);
            }

            Console.WriteLine("test" + Thread.CurrentThread.ManagedThreadId);
        }

   
    }
}