// Exchange a message with the host.
internal void Send(byte[] sendBuffer)
{
if (_connected)
{
//先对数据进行包装,就是把包的大小作为头加入,这必须与服务器端的协议保持一致,否则造成服务器无法处理数据.
var buff = new byte[sendBuffer.Length + 4];
Array.Copy(BitConverter.GetBytes(sendBuffer.Length), buff, 4);
Array.Copy(sendBuffer, 0, buff, 4, sendBuffer.Length);
//查找有没有空闲的发送MySocketEventArgs,有就直接拿来用,没有就创建新的.So easy!
MySocketEventArgs sendArgs = _listArgs.Find(a => a.IsUsing == false) ?? InitSendArgs();
lock (sendArgs) //要锁定,不锁定让别的线程抢走了就不妙了.
{
sendArgs.IsUsing = true;
sendArgs.SetBuffer(buff, 0, buff.Length);
}
_clientSocket.SendAsync(sendArgs);
}
else
{
//throw new SocketException((int)SocketError.NotConnected);
}
}
/// <summary>
/// 初始化发送参数MySocketEventArgs
/// </summary>
/// <returns></returns>
MySocketEventArgs InitSendArgs()
{
var sendArg = new MySocketEventArgs();
sendArg.Completed += IO_Completed;
sendArg.UserToken = _clientSocket;
sendArg.RemoteEndPoint = _hostEndPoint;
sendArg.IsUsing = false;
Interlocked.Increment(ref _tagCount);
sendArg.ArgsTag = _tagCount;
lock (_listArgs)
{
_listArgs.Add(sendArg);
}
return(sendArg);
}