using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Collections;
using System.Windows.Forms;
namespace ThredProcessQueue
{
  //用于顯示狀態(tài)的代理方法類型定義 
  public delegate void DelegateShowStateInfo(string state);
  /// <summary> 
  /// 測試器 
  /// </summary> 
  public class QueueTester
  {
   private static bool _Exit = false; //標(biāo)記是否已中斷測試程序 
   private static Form _OwnerForm; //測試的窗體 
   private static DelegateShowStateInfo _StateMethod;
   private static IList _Queue1 = new ArrayList(); //Queue1的數(shù)據(jù) 
   private static IList _Queue2 = new ArrayList(); //Queue2的數(shù)據(jù) 
   private static IList _Queue3 = new ArrayList(); //Queue3的數(shù)據(jù) 
   
   public static void StopThread()
   {
     _Exit = true;
     _OwnerForm = null;
   }
   public static void Testing(Form sender, DelegateShowStateInfo method)
   {
     _StateMethod = method;
     _OwnerForm = sender;
     _Exit = false;
     ThreadPool.QueueUserWorkItem(MainTestThread);
     ThreadPool.QueueUserWorkItem(Queue1Thread); //啟動Queue1線程 
     ThreadPool.QueueUserWorkItem(Queue2Thread); //啟動Queue2線程 
   }
   //測試用的主線程，循環(huán)向隊列1中壓入數(shù)據(jù)。 
   public static void MainTestThread(object state)
   {
     Random R = new Random(1);
     double V = 0;
     while (_Exit == false)
     {
      //在while（true）里一直對數(shù)據(jù)進(jìn)行讀取，然后放到queue1中， 
      //與此同時如果queue1中有數(shù)據(jù)，則線程1就開啟 
      //臨時數(shù)據(jù),隨機數(shù) 
      V = R.NextDouble();
      _Queue1.Add(V); //把數(shù)據(jù)插入到隊列1 
      Application.DoEvents();
      ShowState();
      Thread.Sleep(100);//生成隨機數(shù)太快,為了看清效果,暫停n毫秒 
     }
   }
   
   //對queue1中的數(shù)據(jù)進(jìn)行處理，處理后放到queue2中 
   public static void Queue1Thread(object state)
   {
     while (_Exit == false)
     {
      while (_Queue1.Count > 0)
      {
        //對queue1中的數(shù)據(jù)進(jìn)行處理，處理后放到queue2中 
        _Queue2.Add(_Queue1[0]);
        _Queue1.RemoveAt(0);
        Application.DoEvents();
        ShowState();
      }
     }
   }
   //對queue2中的數(shù)據(jù)進(jìn)行處理，處理后放到queue3中 
   public static void Queue2Thread(object state)
   {
     while (_Exit == false)
     {
      while (_Queue2.Count > 0)
      {
        //對queue1中的數(shù)據(jù)進(jìn)行處理，處理后放到queue2中 
        _Queue3.Add(_Queue2[0]);
        _Queue2.RemoveAt(0);
        Application.DoEvents();
        ShowState();
      }
     }
   }
   //用于監(jiān)視各隊列狀態(tài)的線程 
   public static void ShowState()
   {
     string stateInfo =
     QueueTester._Queue1.Count.ToString() " -> "
     QueueTester._Queue2.Count.ToString() " -> "
     QueueTester._Queue3.Count.ToString();
     try
     {
      if (_OwnerForm != null)
      {
        _OwnerForm.Invoke(_StateMethod, stateInfo);
        Application.DoEvents();
      }
     }
     catch
     {
     }
   }
  }
}