Simple ThreadPool Implementation

Because of the recent need to use multithreading to deal with some problems, at first I used the. NET default ThreadPool, it doesn't feel right. So I realized a simple threadpool myself.

Write a relatively simple, interested friends to see together to improve.

The code is composed primarily of threadpoolex,workitem,workqueue.

Threadpoolex

　 1using System;

　 2using System.Collections.Generic;

　 3using System.Linq;

　 4using System.Text;

　 5using System.Threading;

　 6using System.Collections; 7 8namespace Netdragon.threadpoolex 9{public class Threadpoolex {a private workqueue _wo

　Rkqueue = new Workqueue ();

　public int maxthreadcount = 10;

　public int minthreadcount = 2;

　Private Hashtable _threadtable = null;

　The private int _threadcount = 0;

　private int _inuseworkthread = 0;

　public double idletimeout = 10; Public Threadpoolex (): This (10,2,2) to public threadpoolex (int max

　Threadcouont, int minthreadcount, int idletimeout) Maxthreadcount = Maxthreadcouont;

　Minthreadcount = Minthreadcount;

　IdleTimeout = idletimeout; _threadtable = hashtable.synchronized (nEW Hashtable (Maxthreadcount));

　Panax Notoginseng public void QueueUserWorkItem (WaitCallback waitcallback, object Objparams) 39 {

　Enqueueworkitem (WaitCallback, objparams); 　　　　　　　　　　　 WaitCallback private void Enqueueworkitem (Waitcallback,object objparams) 44 {45　　　　　　　　　　　　　　　 WorkItem WorkItem = new WorkItem () {workcallback = WaitCallback, 48

　Objparams = Objparams 49};

　Wuyi _workqueue.push (WorkItem); (_inuseworkthread + _waitworkitem > _threadtable.count) (S)

　Tartthread (); Startthread private void () () {_threadtable.c

　Ount < Maxthreadcount) {++_threadcount;

　The thread thread = new Thread (processworkitems);　　　　　　　　　　　　　　　 66 67Thread.

　IsBackground = true; The thread.

　Name = "Threadpoolex #" + _threadcount; Thread.

　Priority = Threadpriority.normal;

　_threadtable[thread] = System.DateTime.Now; A thread.

　Start (); 　　　　　　　　　　　 Processworkitems () () () ()- {(true) workitem WorkItem = _workqueu

　E.pop (); (WorkItem = null) Istimeout = Cu

　Rthreadistimeout (); _threadtab if (istimeout) Le.

　Count > Minthreadcount) {break;　　　　　　　　　　　　　　　　　　　　　　　 97} 98} 99 100System.Threading.Thread.Sleep (100);　　　　　　　　　　　　　　　　　　　　　　　 102 Else, {106

{_threadtable [thread.currentthread] = System.DateTime.Now;

108 Interlocked.Increment (ref _inuseworkthread);

109 Workitem.execute ();　　　　　　　　　　　　　　　　　　　　　　　　　　　 112 catch (Exception) 113 {114　　　　　　　　　　　　　　　　　　　　　　　 Log something/116 finally 117

{118 interlocked.decrement (ref _inuseworkthread); 119} 121} 122} 123 catch (thre

Adabortexception) 124 {thread.resetabort ();　　　　　　　126} 127 finally 128　　　　 {129 if (_threadtable.count > Minthreadcount) 130 {131 _th

Readtable.remove (Thread.CurrentThread); 　　　　　　　　　　　 132} 134} 135 136 private bool Curthreadistimeout () 137 {138

DateTime lastalivetime = (datetime) _threadtable[thread.currentthread];

139 140 DateTime curtime = System.DateTime.Now; Double waitseconds = (curtime-lastalivetime).

TotalSeconds;

143 144 if (Waitseconds > IdleTimeout) 145 {146 return true;

147} 148 149 return false;　　　　　　　　　　　　　　　 152 153 Private int _waitworkitem 154 {151 Get 156 {157

return _workqueue.count; 

158} 159} 160 161 public int ThreadCount 162 {163 Get 164 { 165 return _threadtable.coUnt 166} 167} 168} 169} 170