学步园

 -------------------未经测试--------------
  /// <summary>
        /// 可用请求数，和最大请求数
        /// </summary>
        static Semaphore sk = new Semaphore(3, 3);
 
        static void Begin()
        {
            ///等待有信号
            sk.WaitOne();

            Console.WriteLine("enter:{0}   {1}  ", DateTime.Now, Thread.CurrentThread.ManagedThreadId);
          
            Thread.Sleep(2000);

            //释放信号
            sk.Release();

        }
    
        static void Main(string[] args)
        {
            Thread th = new Thread(new ThreadStart(Begin));
            Thread[] s = new Thread[]{
               new Thread(new ThreadStart(Begin )),
               new Thread(new ThreadStart(Begin )),
               new Thread(new ThreadStart(Begin )),
               new Thread(new ThreadStart(Begin )),
               new Thread(new ThreadStart(Begin )),
               new Thread(new ThreadStart(Begin ))
            };
            /*
             static Semaphore sk = new Semaphore(0, 3);
             sk.Release(3);
             *
             *
             */

            for (int i = 0; i < s.Length; i++)
                s[i].Start();

        }