WSASocket与socket的异步IO区别

WSASocket函数通过制定WSA_FLAG_OVERLAPPED标志可以创建一个支持overlapped I/O 的句柄。而实际上windows中的socket创建的句柄也是支持overlapped I/O的。

参考文献

http://msdn.microsoft.com/library 关键词：WSASocket（见Remarks部分）

摘要：In contrast, the socket function creates a socket that supports overlapped I/O operations as the default behavior.

http://msdn.microsoft.com/library 关键词：socket（见Remarks部分）

摘要：The socket that is created will have the overlapped attribute as a default