/// <summary>
/// 取出SocketAsyncEventArgs
/// 如果取出失败，则new新的SocketAsyncEventArgs并返回
/// 当触发Completed事件后将自动回收
/// </summary>
/// <returns></returns>
public static SocketAsyncEventArgs Take()
{
SocketAsyncEventArgs eventArg;
if (concurrentBag.TryTake(out eventArg) == false)
{
Interlocked.Increment(ref SendArgBag.totalInitCount);
eventArg = new SocketAsyncEventArgs();
eventArg.Completed += (sender, e) => SendArgBag.Add(e);
}
return(eventArg);
}
/// <summary>
/// 异步发送数据
/// </summary>
/// <param name="byteRange">数据范围</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="SocketException"></exception>
public void Send(ByteRange byteRange)
{
if (byteRange == null)
{
throw new ArgumentNullException();
}
if (this.IsConnected == false)
{
throw new SocketException((int)SocketError.NotConnected);
}
var sendArg = SendArgBag.Take();
sendArg.SetBuffer(byteRange.Buffer, byteRange.Offset, byteRange.Count);
if (this.socket.SendAsync(sendArg) == false)
{
SendArgBag.Add(sendArg);
}
this.ExtraState.SetSended(byteRange.Count);
}