浅谈Pool对象

Pool对象的技术指标:

避免频繁创建经常使用的稀有资源,提高工作效率.

控制阀值,很多情况下一些关键资源都有一个最佳并发数,超过这个拐点性能有可能急剧下降,也有可能继续增大并发数性能不能提升.

安全的获取对象和释放对象(使用之后放回连接池)

public sealed class Pool<T> : IDisposable where T : IDisposable  {    private bool disposed = false;    private Semaphore gate;    private Stack<T> pool;    public event Predicate<T> Predicate;    public Pool(int concrrent,Func<Pool<T>,T> activator)    {      if (concrrent <= 0)      {        throw new ArgumentException("concrrent");      }      if (activator==null)      {        throw new ArgumentNullException("activator");      }      gate = new Semaphore(concrrent, concrrent);      pool = new Stack<T>();      for (int i=0;i< concrrent; i++)      {        pool.Push(activator(this));       }          }    public T Acquire()    {      if (!gate.WaitOne())        throw new InvalidOperationException();      lock (pool)      {        return pool.Pop();      }    }    public void Release(T target)    {      lock (pool)      {        if (Predicate!=null)        {          if (Predicate(target))          {            pool.Push(target);            gate.Release();          }        }        else        {          if (target != null)          {            pool.Push(target);            gate.Release();          }           }      }    }    private void Dispose(bool disposing)    {      if (disposed)        return;      if (disposing)      {        gate.Dispose();      }      for (int i = 0; i < pool.Count; i++)      {        var t = pool.Pop();        t.Dispose();      }      disposed = true;    }    public void Dispose()    {      Dispose(true);      GC.SuppressFinalize(this);    }    ~Pool()    {      Dispose(false);    }  }

原标题：浅谈Pool对象

关键词：