CMyError类的实现：
#ifndef __MYERROR_H__ #define __MYERROR_H__ #include "Error.h" class CMyError : public LinWin::CError { public: virtual int OnError(int level) { return -1; } virtual int OnError(int code, int level) { return 0; } }; #endif一个接口返回了-1，一个接口返回 了0；算是最简单的一个实现类了吧，具体的实现类可以更复杂，这就根据需求了。我在这里，只是给出一个最简单的处理。 返回-1（非0）表示，表示不作任何处理，让调用者使用默认处理。返回0，表示已处理过了，调用者不需要再处理。
CMyExit类：
#ifndef __MYEXIT_H__ #define __MYEXIT_H__ #include "Exit.h" class CMyExit : public LinWin::CExit { private: bool m_bExit; public: CMyExit() : m_bExit(false) {} bool OnExit() { return m_bExit; } void SetExit() { m_bExit = true; } }; #endif退出的实现类也很简单，就一个数据成员，两个接口的实现也都是只有一行代码。
CMySelectEvent类 头文件 MySelectEvent.h
#ifndef __MYSELECTEVENT_H__ #define __MYSELECTEVENT_H__ #include "SocketImpl.h" #include "TcpClient.h" #include "NetworkEvent.h" #include "Exit.h" #include <map> class CMySelectEvent : public LinWin::CNetworkEvent { private: LinWin::CSocketImpl* m_server; LinWin::CExit* m_exit; std::map<net_socket_fd, LinWin::CTcpClient*> m_mapClients; public: CMySelectEvent(); CMySelectEvent(LinWin::CSocketImpl* server, LinWin::CExit* exit); ~CMySelectEvent(); void SetServer(LinWin::CSocketImpl* server); void SetExit(LinWin::CExit* exit); virtual int OnAccept(net_socket_fd &fdAccept); virtual int OnRead(net_socket_fd fd); virtual int OnWrite(net_socket_fd fd); virtual int OnClose(net_socket_fd fd); }; #endif实现文件CMySelectEvent.cpp
#include "MySelectEvent.h" #include "Exit.h" #include <iostream> CMySelectEvent::CMySelectEvent() : m_server(NULL), m_exit(NULL) { } CMySelectEvent::CMySelectEvent(LinWin::CSocketImpl* server, LinWin::CExit* exit) : m_server(server), m_exit(exit) { } CMySelectEvent::~CMySelectEvent() { } void CMySelectEvent::SetServer(LinWin::CSocketImpl* server) { m_server = server; } void CMySelectEvent::SetExit(LinWin::CExit* exit) { m_exit = exit; } int CMySelectEvent::OnAccept(net_socket_fd &fdAccept) { LinWin::CSocketAddress clientAddr; LinWin::CTcpClient* sockClient = new LinWin::CTcpClient; if (!sockClient) return -1; if (sockClient->Create(true) != 0) return -1; if (m_server->Accept(sockClient->Handle(), clientAddr) != 0) return -1; fdAccept = sockClient->Sockfd(); m_mapClients.insert(std::make_pair(fdAccept, sockClient)); std::cout << "Recevie a connect: " << clientAddr.ToString() << std::endl; //sockClient->Close(); return 0; } int CMySelectEvent::OnRead(net_socket_fd fd) { char buf[1024] = { 0 }; if (m_mapClients.find(fd) == m_mapClients.end()) return -1; int ret = m_mapClients[fd]->Recv(buf, 1023); if (ret == NET_SOCKET_ERROR || ret == 0) return -1; buf[ret] = '\0'; std::cout << "Receive: " << buf << std::endl; return 0; } int CMySelectEvent::OnWrite(net_socket_fd fd) { std::cout << "OnWrite" << std::endl; return 0; } int CMySelectEvent::OnClose(net_socket_fd fd) { if (m_mapClients.find(fd) == m_mapClients.end()) return -1; delete m_mapClients[fd]; m_mapClients.erase(fd); std::cout << "Close a client." << std::endl; if (m_mapClients.size() == 0) { m_exit->SetExit(); std::cout << "All clients quit." << std::endl; } return 0; }这个事件类的实现，比较麻烦，多用了一个map类。其实，完全可以把这个map类省掉。因为，有这样CSocketImpl(net_socket_fd sockfd)的构造函数。我可以很容易的包装一个net_socket_fd。
