ThreadLocal<T>的是否有设计问题

一、吐槽

ThreadLocal<T>明显是.NET从JAVA中来的一个概念,但是这种设计是否出现了问题.

很明显,在JAVA中threadLocal直接是Thread的成员,当然随着thread这个宿主而存在.

但.NET中对于ThreadLocal<T>的设计明显独立于Thread之外(当然你可以说内部有关联)

,起最终结果是ThreadLocal<T>所产生的对象不会随着线程的终止而释放.

二、问题代码

/*
 * 由SharpDevelop创建。
 * 用户： qsmy
 * 日期: 2016/12/31
 * 时间: 9:31
 * 
 * 要改变这种模板请点击 工具|选项|代码编写|编辑标准头文件
 */
using System;
using System.Threading;
 
namespace ThreadLocalTest
{
    public class MyObject
    {
        public static readonly ThreadLocal<MyObject> threadLocal 
            = new ThreadLocal<MyObject>(true);
         
        public static MyObject GetCurrentThreadMyObject(String name)
        {
            if (threadLocal.Value == null) {
                threadLocal.Value = new MyObject(name);
            }
            return threadLocal.Value;
        }
         
        String _name;
        public byte[] _bs;
        public MyObject(String name)
        {
            _name = name;
            Console.WriteLine("创建MyObject.name=" + name);
            _bs=new byte[(1024*1024*500)];
            for (int i = 0; i < _bs.Length; i++) {
                _bs[i]=3;
            }
        }
        ~MyObject()
        {
            Console.WriteLine("析构MyObject.name=" + _name);
        }
        public void Dispose()
        {
             threadLocal.Value = null;
             threadLocal.Values.Clear();
            //Console.WriteLine(MyObject.threadLocal.Values.Count);
        }
    }
    class Program
    {
          
        public static void Main(string[] args)
        {
              
            Thread th1 = new Thread((state) => {                                 
                var obj = MyObject.GetCurrentThreadMyObject("obj1");
                obj.ToString();
                Console.WriteLine("t1.id=" + Thread.CurrentThread.ManagedThreadId);
                  
                obj.Dispose();
                Thread.CurrentThread.Abort();
            });
            th1.Start();
             
              
            Thread th2 = new Thread((state) => {
                var obj = MyObject.GetCurrentThreadMyObject("obj2");
                obj.ToString();
                Console.WriteLine("t2.id=" + Thread.CurrentThread.ManagedThreadId);
                obj.Dispose();
                Thread.CurrentThread.Abort();
            });
            th2.Start();
             
            Thread.Sleep(20000);
            Console.WriteLine(th1.ThreadState);
              
              
             
            Console.ReadKey(true);
        }
    }
}