#pragma once  /************************************************************************//*   seleect io模型的select操作封装 *//************************************************************************/ class Selector{public:	Selector(void){reset();};	~Selector(void){} 	inline void reset()	{		FD_ZERO(&fdSocket);	} 	inline void add_sock(SOCKET s)	{		FD_SET(s, &fdSocket);	}; 	inline int test_sock(SOCKET s)	{		return FD_ISSET( s , &fdSocket);	} 	int select(int timeout=10)	{		struct timeval tv = {0, timeout}; //超时定义,10毫秒 		int nRet = ::select(0, &fdSocket, NULL, NULL, &tv);		//if (nRet==0) //超时		//if( nRet==SOCKET_ERROR )  // 出错 		return nRet;	} private: 	fd_set fdSocket;	  };

具体使用可以参考