/// <summary>
/// 异步读取结束
/// </summary>
/// <param name="iar">异步结果</param>
private void EndRead(IAsyncResult iar)
{
SocketHandlerState state = (SocketHandlerState)iar.AsyncState;
try
{
state.DataLength = state.Stream.EndRead(iar);
}
catch
{
state.DataLength = 0;
}
if (state.DataLength == 0) //表示Socket断开连接
{
lock (StateSet)
StateSet.Add(state.AsyncResult, state);
state.Data = new byte[0]; //设定接收的数据为空
state.DataLength = 0; //设定接收的数据长度为0
((AutoResetEvent)state.AsyncResult.AsyncWaitHandle).Set(); //允许等待线程继续
state.AsyncCallBack(state.AsyncResult); //执行异步回调函数
return;
}
if (state.Completed) //如果已经完成状态，开始下次接收
{
lock (StateSet)
StateSet.Add(state.AsyncResult, state);
((AutoResetEvent)state.AsyncResult.AsyncWaitHandle).Set(); //允许等待线程继续
state.AsyncCallBack(state.AsyncResult); //执行异步回调函数
try
{
state.Stream.BeginRead(state.Data, 0, 1024, EndRead, state); //继续接收数据
}
catch //出现Socket异常
{
lock (StateSet)
StateSet.Add(state.AsyncResult, state);
state.Data = new byte[0]; //设定接收的数据为空
state.DataLength = 0; //设定接收的数据长度为0
((AutoResetEvent)state.AsyncResult.AsyncWaitHandle).Set(); //允许等待线程继续
state.AsyncCallBack(state.AsyncResult); //执行异步回调函数
}
}
}
/// <summary>
/// 异步写入结束
/// </summary>
/// <param name="iar">异步结果</param>
private void EndWrite(IAsyncResult iar)
{
SocketHandlerState state = (SocketHandlerState)iar.AsyncState;
lock (StateSet) //锁定StateSet
StateSet.Add(state.AsyncResult, state);
try
{
state.Stream.EndWrite(iar);
}
catch //出现Socket异常
{
state.Completed = false; //发送失败
((AutoResetEvent)state.AsyncResult.AsyncWaitHandle).Set(); //允许等待线程继续
state.AsyncCallBack(state.AsyncResult); //执行异步回调函数
return;
}
state.Completed = true; //发送成功
((AutoResetEvent)state.AsyncResult.AsyncWaitHandle).Set(); //允许等待线程继续
state.AsyncCallBack(state.AsyncResult); //执行异步回调函数
lock (SendQueue) //锁定SendQueue
{
SocketHandlerState prepare = null;
SendQueue.Remove(state); //移除当前发送完成的数据
if (SendQueue.Count > 0) //如果SendQueue还有数据待发送，则继续发送
{
prepare = SendQueue[0];
}
if (prepare != null)
{
try
{
prepare.Stream.BeginWrite(prepare.Data, 0, prepare.Data.Length, EndWrite, prepare).AsyncWaitHandle.WaitOne(); //开始异步发送数据
}
catch
{
state.Completed = false; //发送失败
((AutoResetEvent)state.AsyncResult.AsyncWaitHandle).Set(); //允许等待线程继续
state.AsyncCallBack(state.AsyncResult); //执行异步回调函数
}
}
}
}
