private readonly object _lockObj; //保证_count的多线程同步
/// <summary>
/// 创建一个延时的阻塞队列
/// </summary>
/// <param name="capacity"></param>
/// <param name="delayTime">队列中每个元素的延时时间</param>
public MessageQueueDelay(int capacity, int delayTime)
{
_count = 0;
_delayTime = delayTime;
/**
* 先将元素保存于延时队列中
* 若过期，则从延时队列抛出
* 将延时队列抛出的元素保存至缓冲队列中
* 若缓冲队列中存在元素，则元素可被取出；否则进入阻塞状态
*/
_synQueue = new SimpleSynQueue <T>();
_delayDispatcherQueue = new DelayDispatcherQueue <T>(capacity);
_delayDispatcherQueue.GetEvent += delegate(T t) { _synQueue.Enqueue(t); };
_lockObj = new object();
}
public void Enqueue(T t)
{
_synQueue.Enqueue(t);
}