[C#-Util]ObjectPool Prototype

下午不知道哪根筋不对劲了,突然去看看了最简单的DesignPattern之一的Singleton模式.看到了以前没有注意的一句话:只有一个实例只是最基本应用.在对象池中则要求多个实例.于是关于了一下对象池的实现.看了半天,好像多数的实现都是:http://blog.csdn.net/teddyma/archive/2006/01/11/4605987.aspx 这个版本的.看了会感觉这种简单的东西应该代码尽量简单才好.于是写了以下的版本.有什么问题,请大家指正.

using System;
using System.Collections;
using System.Diagnostics;

namespace DesignParttenProtype.Singleton.ObjectPool
{
public class ObjectPoolHelper < T >
{
private static volatile ObjectPoolHelper < T > _instance;
private static object lockHelper = new object ();
Queue _queue = new Queue();

private ObjectPoolHelper( int poolSize)
{
while (poolSize > 0 )
{
poolSize -- ;
_queue.Enqueue(Activator.CreateInstance < T > ());
// Thread.Sleep(1000);
Debug.WriteLine( " Add An Object Into ObjectPool Done! " );
}
}

/// <summary>
/// GetInstance
/// </summary>
/// <param name="poolSize"></param>
/// <returns></returns>
public static ObjectPoolHelper < T > GetSingletonInstance( int poolSize)
{
if (_instance == null )
{
lock (lockHelper)
{
if (_instance == null )
{
_instance = new ObjectPoolHelper < T > (poolSize);
}
}
}

return _instance;
}

/// <summary>
/// Draw
/// </summary>
/// <returns></returns>
public T Draw()
{
T obj;
if (_queue.Count > 0 )
{
obj = (T)_queue.Dequeue();
Debug.WriteLine( " Get An Object From Pool. " );
}
else
{
obj = Activator.CreateInstance < T > ();
Debug.WriteLine( " Get New Object " );

}
return obj;
}

/// <summary>
/// Release
/// </summary>
/// <param name="type"></param>
public void Release(T type)
{
if (type != null )
{
_queue.Enqueue(type);
}
}

/// <summary>
/// RemoveAll
/// </summary>
public void RemoveAll()
{
_queue.Clear();
}
}
}