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// å°ä¸ä¸ªçº¿ç¨æ¾è¿çº¿ç¨æ± ï¼è¯¥çº¿ç¨ç Start() æ¹æ³å°è°ç¨ WaitCallback 代ç对象代表çå½æ°
public static bool QueueUserWorkItem(WaitCallback);
// éè½½çæ¹æ³å¦ä¸ï¼åæ° object å°ä¼ éç» WaitCallback æ代表çæ¹æ³
public static bool QueueUserWorkItem(WaitCallback, object);
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using System;
using System.Collections;
using System.Threading;
namespace ThreadExample
{
/// <summary>
/// è¿æ¯ç¨æ¥ä¿åä¿¡æ¯çæ°æ®ç»æï¼å°ä½ä¸ºåæ°è¢«ä¼ é
/// </summary>
public class SomeState
{
public int Cookie;
public SomeState(int iCookie)
{
Cookie = iCookie;
}
}
public class Alpha
{
public Hashtable HashCount;
public ManualResetEvent eventX;
public static int iCount = 0;
public static int iMaxCount = 0;
public Alpha(int MaxCount)
{
HashCount = new Hashtable(MaxCount);
iMaxCount = MaxCount;
}
/// <summary>
/// 线ç¨æ± éç线ç¨å°è°ç¨ Beta()æ¹æ³
/// </summary>
/// <param name="state"></param>
public void Beta(Object state)
{
// è¾åºå½å线ç¨ç hash ç¼ç å¼å Cookie çå¼
Console.WriteLine(" {0} {1} :", Thread.CurrentThread.GetHashCode(), ((SomeState)state).Cookie);
Console.WriteLine("HashCount.Count=={0}, Thread.CurrentThread.GetHash Code()=={1}", HashCount.Count,
Thread.CurrentThread.GetHashCode());
lock (HashCount)
{
// å¦æå½åç Hash 表ä¸æ²¡æå½å线ç¨ç Hash å¼ï¼åæ·»å ä¹
if (!HashCount.ContainsKey(Thread.CurrentThread.GetHashCode()))
HashCount.Add(Thread.CurrentThread.GetHashCode(), 0);
HashCount[Thread.CurrentThread.GetHashCode()] = ((int)HashCount[Thread.CurrentThread.GetHashCode()]) + 1;
}
Thread.Sleep(2000);
// Interlocked.Increment() æä½æ¯ä¸ä¸ªååæä½ï¼å
·ä½è¯·çä¸é¢è¯´æ
Interlocked.Increment(ref iCount);
if (iCount == iMaxCount)
{
Console.WriteLine();
Console.WriteLine("Setting eventX ");
eventX.Set();
}
}
}
public class SimplePool
{
public static void Main(string[] args)
{
Console.WriteLine("Thread Pool Sample:");
bool W2K = false;
// å
许线ç¨æ± ä¸è¿è¡æå¤ 10 个线ç¨
int MaxCount = 10;
// æ°å»º ManualResetEvent 对象并ä¸åå§å为æ ä¿¡å·ç¶æ
ManualResetEvent eventX = new ManualResetEvent(false);
Console.WriteLine("Queuing {0} items to Thread Pool", MaxCount);
// 注æåå§å oAlpha 对象ç eventX å±æ§
Alpha oAlpha = new Alpha(MaxCount);
oAlpha.eventX = eventX;
Console.WriteLine("Queue to Thread Pool 0");
try
{
// å°å·¥ä½é¡¹è£
å
¥çº¿ç¨æ±
// è¿éè¦ç¨å° Windows 2000 以ä¸çæ¬ææç APIï¼æ以å¯è½åºç° NotSupp ortException å¼å¸¸
ThreadPool.QueueUserWorkItem(new WaitCallback(oAlpha.Beta), new SomeState(0));
W2K = true;
}
catch (NotSupportedException)
{
Console.WriteLine("These API's may fail when called on a non-Wind ows 2000 system.");
W2K = false;
}
if (W2K) // å¦æå½åç³»ç»æ¯æ ThreadPool çæ¹æ³.
{
for (int iItem = 1; iItem < MaxCount; iItem++)
{
// æå
¥éåå
ç´
Console.WriteLine("Queue to Thread Pool {0}", iItem);
ThreadPool.QueueUserWorkItem(new WaitCallback(oAlpha.Beta), new SomeState(iItem));
}
Console.WriteLine("Waiting for Thread Pool to drain");
// çå¾
äºä»¶çå®æï¼å³çº¿ç¨è°ç¨ ManualResetEvent.Set() æ¹æ³
eventX.WaitOne(Timeout.Infinite, true);
// WaitOne() æ¹æ³ä½¿è°ç¨å®ç线ç¨çå¾
ç´å° eventX.Set() æ¹æ³è¢«è°ç¨
Console.WriteLine("Thread Pool has been drained (Event fired)");
Console.WriteLine();
Console.WriteLine("Load across threads");
foreach (object o in oAlpha.HashCount.Keys)
{
Console.WriteLine("{0} {1}", o, oAlpha.HashCount[o]);
}
}
Console.ReadLine();
}
}
}
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èµ·æ¥æä¾ç»çº¿ç¨ï¼èè¿ç§æ¹å¼æ¯é常ææçã
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容干åãæçå°±é®ä½ æçè¿ä¸ªå好æ¯å¯¹æ¯éï¼åä¸åçï¼ä½ çç»æè¯è®ºå°±è¡ãä¸è¿è¿æ¯è°¢è°¢ä½ äºï¼