未能使网络套接字句柄处于阻滞模式。

A network socket handle could not be put into blocking mode.

youdao

当你把某个套接字和 IOCP 关联，你可以用套接字句柄作为完成键去提供单句柄信息。

You can use your socket handle as the completion key when you register the socket with the IOCP to provide per handle information.

youdao

另一方面，像文件句柄和套接字句柄这类非内存资源必须由程序显式地释放，比如使用 close()、destroy()、shutdown() 或 release() 这样的方法来释放。

On the other hand, nonmemory resources like file handles and socket handles must be explicitly released by the program, using methods with names like close(), destroy(), shutdown(), or release().

youdao