UnixStreamSocket::UnixStreamSocket
{
	...
	err = uv_read_start(
			  reinterpret_cast<uv_stream_t*>(this->uvHandle),
			  static_cast<uv_alloc_cb>(onAlloc),
			  static_cast<uv_read_cb>(onRead));	// 为什么不直接使用OnUvRead?
}

// 这样写有什么好处？
inline static void onRead(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf)
{
	auto* socket = static_cast<UnixStreamSocket*>(handle->data);

	if (socket)
		socket->OnUvRead(nread, buf);
}

// 为与uv_read_cb的函数参数类型相匹配，uv_stream_t* handle是本问题添加的。
inline void UnixStreamSocket::OnUvRead(uv_stream_t* handle, ssize_t nread, const uv_buf_t* /*buf*/)
{
}