gistfile1.txt

using System;
using System.Collections;
using System.Collections.Generic;

public class ObjectPool<T> where T : class {
		private readonly Func<T> _objectFactory;
		private readonly Queue<T> _queue = new Queue<T>();

		/// <summary>
		/// 对象池
		/// </summary>
		/// <param name="objectFactory">构造缓存对象的函数</param>

		public ObjectPool(Func<T> objectFactory) {
			_objectFactory = objectFactory;
		}

		/// <summary>
		/// 构造指定数量的对象
		/// </summary>
		/// <param name="count">数量</param>
		public void Allocate(int count) {
			for (int i = 0; i < count; i++) {
				_queue.Enqueue (_objectFactory ());
			}
		}

		/// <summary>
		/// 缓存一个对象
		/// </summary>
		/// <param name="obj">对象</param>
		void Enqueue(T obj) {
			_queue.Enqueue(obj);
		}

		/// <summary>
		/// 获取一个对象
		/// </summary>
		/// <returns>对象</returns>
		public T BorrowObject() {
			T obj;
			if (_queue.Count == 0) {
				obj = _objectFactory ();
				//_queue.Enqueue (obj);
			} else {
				obj = _queue.Dequeue();
				if (obj == null) {
					obj = _objectFactory ();
					//_queue.Enqueue(obj);
				}
			}
			return obj;
		}

		/// <summary>
		/// 返还一个对象
		/// </summary>
		/// <returns>对象</returns>
		public void ReturnObject(ref T obj) {
			if (obj != null) {
				_queue.Enqueue(obj);
			}
		}
	}