线程池的简单例子

class Program
{
    static readonly ReaderWriterLockSlim locker = new ReaderWriterLockSlim();
    const int cycleNum = 10;
    static int cnt = 10;
    static AutoResetEvent myEvent = new AutoResetEvent(false);
    static void Main(string[] args)
    {
        ThreadPool.SetMinThreads(1, 1);
        ThreadPool.SetMaxThreads(5, 5);
        for (int i = 1; i <= cycleNum; i++)
        {
            ThreadPool.QueueUserWorkItem(new WaitCallback(testFun), i.ToString());
        }
        Console.WriteLine("主线程执行！");
        Console.WriteLine("主线程结束！");
        myEvent.WaitOne();
        Console.WriteLine("线程池终止！");
        Console.ReadKey();
    }
    public static void testFun(object obj)
    {
        Console.WriteLine(string.Format("{0}:第{1}个线程,cnt={2}", DateTime.Now.ToString(), obj.ToString(), cnt));

        locker.EnterWriteLock();
        cnt -= 1;
        locker.ExitWriteLock();

        Thread.Sleep(100);

        locker.EnterReadLock();
        if (cnt == 0)
        {
            myEvent.Set();
        }
        locker.ExitReadLock();
    }
}