希望AsyncWrite添加一个回调 about gnet HOT 1 CLOSED

func (c *conn) write(buf []byte) {
	if !c.outboundBuffer.IsEmpty() {
		_, _ = c.outboundBuffer.Write(buf)
		return
	}
	n, err := unix.Write(c.fd, buf)
	if err != nil {
		if err == unix.EAGAIN {
			_, _ = c.outboundBuffer.Write(buf)
			_ = c.loop.poller.ModReadWrite(c.fd)
			return
		}
		_ = c.loop.loopCloseConn(c, err)
		return
	}
	if n < len(buf) {
		_, _ = c.outboundBuffer.Write(buf[n:])
		_ = c.loop.poller.ModReadWrite(c.fd)
	}
}