C#中 一个多线程框架

C#提供了丰富的多线程操作，为编程带来了极大的便利，但如果使用不当也会带来各种各样的麻烦。

这里把C#中多线的操作进行了一下简单的封装，使它对外提供的接口简洁，易于控制。

保留一下的代码片段，以备日后查用。

BaseThread基类，线程派生类可以继承这个基类，并且实现自己的Run方法。

using System;using System.Collections.Generic;using System.Text;using System.Threading;namespace BaseThread{    public class BaseThread    {        public enum ThreadStatus        {            CREATED,            RUNNING,            STOPED,        };        private int m_Tid;        private bool m_IsAlive;        private ThreadStatus m_Status;        private Thread m_WorkingThread;        private static void WorkFunction(object arg)        {            try            {                System.Diagnostics.Trace.WriteLine("BaseThread::WorkFunction {");                ((BaseThread)arg).Run();                System.Diagnostics.Trace.WriteLine("BaseThread::WorkFunction }");            }            catch (ThreadAbortException abt_ex)            {                System.Diagnostics.Trace.WriteLine("BaseThread::WorkFunction ThreadAbortException " + abt_ex.ToString());                Thread.ResetAbort();            }            catch (ThreadInterruptedException int_ex)            {                System.Diagnostics.Trace.WriteLine("BaseThread::WorkFunction ThreadAbortException " + int_ex.ToString());            }            catch (Exception ex)            {                System.Diagnostics.Trace.WriteLine("BaseThread::WorkFunction Exception " +ex.ToString());            }            finally            {                ((BaseThread)arg).Status = ThreadStatus.STOPED;                m_IsAlive = false;                m_Tid = -1;            }        }        public BaseThread()        {            m_WorkingThread = new Thread(WorkFunction);            m_Tid = -1;            m_IsAlive = false;            m_Status = ThreadStatus.CREATED;        }        public int Start()        {            try            {                System.Diagnostics.Trace.WriteLine("DLx Framework BaseThread Start() {");                m_WorkingThread.Start(this);                m_Tid = m_WorkingThread.ManagedThreadId;                m_IsAlive = true;                m_Status = ThreadStatus.RUNNING;                System.Diagnostics.Trace.WriteLine("DLx Framework BaseThread Start() }");            }            catch(Exception ex)            {                System.Diagnostics.Trace.WriteLine("DLx Framework BaseThread Start() Get an exception: " + ex.ToString());                m_Tid = -1;                m_IsAlive = false;                m_Status = ThreadStatus.STOPED;            }            return 0;        }        public int Stop(int timeout)        {            System.Diagnostics.Trace.WriteLine("DLx Framework BaseThread Stop {");            try            {                if (m_IsAlive)                {                    System.Diagnostics.Trace.WriteLine("BaseThread Stop: Thread is alive");                    m_IsAlive = false;                    if (timeout > 0)                    {                        if (!m_WorkingThread.Join(timeout))                        {                            System.Diagnostics.Trace.WriteLine("BaseThread Stop: Join failed, m_WorkingThread.Abort {");                            m_IsAlive = false;                            m_WorkingThread.Abort();                            System.Diagnostics.Trace.WriteLine("BaseThread Stop: Join failed, m_WorkingThread.Abort }");                        }                    }                    else                    {                        if (!m_WorkingThread.Join(3000))                        {                            System.Diagnostics.Trace.WriteLine("BaseThread Stop: Join Timer default = 3000 failed, m_WorkingThread.Abort {");                            m_IsAlive = false;                            m_WorkingThread.Abort();                            System.Diagnostics.Trace.WriteLine("BaseThread Stop: Join Timer default = 3000 failed, m_WorkingThread.Abort }");                        }                    }                }                else                {                    System.Diagnostics.Trace.WriteLine("BaseThread Stop: Thread is NOT alive");                    if (m_WorkingThread != null)                    {                        System.Diagnostics.Trace.WriteLine("BaseThread Stop: Thread status is UNUSUAL");                        if (m_WorkingThread.IsAlive)                        {                            System.Diagnostics.Trace.WriteLine("BaseThread Stop: Force to ABOTR ");                            m_WorkingThread.Abort();                        }                    }                }                m_WorkingThread = null;            }            catch (Exception ex)            {                System.Diagnostics.Trace.WriteLine("BaseThread Stop: " + ex.ToString());            }            System.Diagnostics.Trace.WriteLine("DLx Framework BaseThread Stop }");            return 0;        }                public int Tid        {            get { return m_Tid; }            }        public bool IsAlive        {            get { return m_IsAlive; }        }        public ThreadStatus Status        {            get { return m_Status; }            set { m_Status = value; }        }        public virtual void Run(){}        ~BaseThread()        {            if (m_WorkingThread != null)            {                System.Diagnostics.Trace.WriteLine("~BaseThread: Thread status is UNUSUAL");                if (m_WorkingThread.IsAlive)                {                    System.Diagnostics.Trace.WriteLine("~BaseThread: Force to ABOTR ");                    m_WorkingThread.Abort();                }                m_WorkingThread = null;            }        }    }}

子类继承 BaseThread，它的Run函数很简单，只是打印数字。

using System;using System.Collections.Generic;using System.Linq;using System.Text;using DLxFramework;namespace UseThreadBase{    public class Worker : BaseThread    {        public Worker()        {}        private int m_i = 0;        public override void Run()        {            while (IsAlive)            {                Console.WriteLine("Worker : " + m_i++);            }        }        public int Value        {            get { return m_i; }        }    }}

Main函数启动和停止工作线程。

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace UseThreadBase{    class Program    {        static void Main(string[] args)        {            Worker work = new Worker();            work.Start();            System.Threading.Thread.Sleep(5000);            work.Stop(2000);        }    }}

在整个的例子中，业务处理的工作单元并不需要去关注线程的启动，停止和异常处理等细节。它只需要重载Run函数，并添加自己的工作内容即可。

BaseThread中实现了对线程的基本控制。