通过锁字符串达到控制并发的效果C#

小咪咪 2022-04-24 04:38 77阅读 0赞

# [通过锁字符串达到控制并发的效果C\#][C] #

lock锁的是内存地址

而.net有内部机制使得相同的字符串内存地址是相同的(new string)除外

运行效果图：

![650351-20190121185032091-1215028076.png][]

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Runtime.InteropServices;
    using System.Text;
    using System.Threading;
    
    namespace ConsoleApp
    {
        //class Program
        //{
        //    static void Main(string[] args)
        //    {
    
        //        List<string> keyList = new List<string> { "key1", "key2", "key1", "key1", "key1", "key1", };
    
        //        keyList.ForEach(u =>
        //        {
        //            ThreadPool.QueueUserWorkItem(s =>
        //            {
        //                Test.lockTestByString(u);
        //            });
    
        //        });
    
        //        Console.Read();
    
        //    }
        //}
    
    
        public class Test
        {
    
            public static void lockTestByString(string key)
            {
                lock (key)
                {
                    GCHandle handle = GCHandle.Alloc(key, GCHandleType.Pinned);
                    //获取内存地址
                    IntPtr address = handle.AddrOfPinnedObject();
    
                    Console.WriteLine("上锁2s key=" + key + " 内存地址：" + address);
                    Thread.Sleep(2000);
                    Console.WriteLine("解锁");
    
                }
            }
    
        }
    
    
        class Program
        {
            static void Main(string[] args)
            {
    
                List<string> keyList = new List<string> { new string('k', 1), new string('k', 1), new string('k', 1), new string('k', 1) };
    
                keyList.ForEach(u =>
                {
                    ThreadPool.QueueUserWorkItem(s =>
                    {
                        Test.lockTestByString(u);
                    });
    
                });
    
                Console.Read();
            }
        }
    
    
    
    
    
    
    
    }

运行效果图：

![650351-20190121185148031-1602094584.png][]

posted @ 2019-01-21 18:52 [波霸38][38] 阅读( ...) 评论( ...) [编辑][Link 1] 收藏

[C]: https://www.cnblogs.com/sharing1986687846/p/10300416.html
[650351-20190121185032091-1215028076.png]: /images/20220219/967e3ddc86e14208825d03acc52956bb.png
[650351-20190121185148031-1602094584.png]: /images/20220219/6c8a5841317f45188fc9294bec1ec628.png
[38]: https://www.cnblogs.com/sharing1986687846/
[Link 1]: https://i.cnblogs.com/EditPosts.aspx?postid=10300416