学习笔记:给某个方法设定执行超时时间

实现代码:

namespace ConsoleApplication4
{
    public delegate void DoHandler();

    public class TimeOut
    {
        private ManualResetEvent mTimeoutObject;
        //标记变量
        private bool mBoTimeout;
        public DoHandler Do;

        public TimeOut()
        {
            //  初始状态为 停止
            this.mTimeoutObject = new ManualResetEvent(true);
        }
        ///<summary>
        /// 指定超时时间 异步执行某个方法
        ///</summary>
        ///<returns>执行 是否超时</returns>
        public bool DoWithTimeout(TimeSpan timeSpan)
        {
            if (this.Do == null)
            {
                return false;
            }
            this.mTimeoutObject.Reset();
            this.mBoTimeout = true; //标记
            this.Do.BeginInvoke(DoAsyncCallBack, null);
            // 等待 信号Set
            if (!this.mTimeoutObject.WaitOne(timeSpan, false))
            {
                this.mBoTimeout = true;
            }
            return this.mBoTimeout;
        }
        ///<summary>
        /// 异步委托 回调函数
        ///</summary>
        ///<param name="result"></param>
        private void DoAsyncCallBack(IAsyncResult result)
        {
            try
            {
                this.Do.EndInvoke(result);
                // 指示方法的执行未超时
                this.mBoTimeout = false;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                this.mBoTimeout = true;
            }
            finally
            {
                this.mTimeoutObject.Set();
            }

        }
    }
}

 测试代码:

 

namespace ConsoleApplication4
{
    class Program
    {
        private static Stopwatch watch;
        private static System.Threading.Timer timer;

        [STAThread]
        static void Main(string[] args)
        {
            watch = new Stopwatch();
            TimeOut timeout = new TimeOut();
            timeout.Do = new Program().DoSomething;
            watch.Start();
            timer = new System.Threading.Timer(timerCallBack, null, 0, 500);
            Console.WriteLine("4秒超时开始执行");
            bool bo = timeout.DoWithTimeout(new TimeSpan(0, 0, 0, 4));
            Console.WriteLine(string.Format("4秒超时执行结果,是否超时：{0}", bo));
            Console.WriteLine("***************************************************");

            timeout = new TimeOut();
            timeout.Do = new Program().DoSomething;
            Console.WriteLine("6秒超时开始执行");
            bo = timeout.DoWithTimeout(new TimeSpan(0, 0, 0, 6));
            Console.WriteLine(string.Format("6秒超时执行结果,是否超时：{0}", bo));

            timerCallBack(null);

            watch.Stop();
            timer.Dispose();
            Console.ReadLine();

        }

        static void timerCallBack(object obj)
        {
            Console.WriteLine(string.Format("运行时间:{0}秒", watch.Elapsed.TotalSeconds.ToString("F2")));
        }
        public void  DoSomething()
        {
            // 休眠 5秒
            System.Threading.Thread.Sleep(new TimeSpan(0, 0, 0, 5));
        }

    }
}

 

执行结果: