singleton class C++ Singleton 模式

最新推荐文章于 2025-10-09 18:25:35 发布

原创最新推荐文章于 2025-10-09 18:25:35 发布 · 849 阅读

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#class #c++ #socket #sockets #initialization #include

本文介绍了如何使用C++在Win32平台上实现Socket类，并通过WSAInitializer类确保Winsock仅被初始化一次。该设计利用了单例模式来管理Winsock的生命周期。

三个文件:socket_include.h 、socket.h 、socket.cpp;

//socket_include.h

#ifndef _SOCKETS_socket_include_H
#define _SOCKETS_socket_include_H

// class WSAInitializer is a part of the Socket class (on win32)
// as a static instance - so whenever an application uses a Socket,
// winsock is initialized
class WSAInitializer // Winsock Initializer
{
public:
WSAInitializer() {
      if (WSAStartup(0x101,&m_wsadata))
    {
         exit(-1);
     }
}
~WSAInitializer() {
     WSACleanup();
}
private:
     WSADATA m_wsadata;
};

//Socket.h

#ifndef _SOCKETS_Socket_H
#define _SOCKETS_Socket_H

#include "socket_include.h"

class Socket
{
..............

     #ifdef _WIN32
     static WSAInitializer m_winsock_init; //< Winsock initialization singleton class
     #endif

..............

}

//Socket.cpp

#include "Socket.h"

// statics
#ifdef _WIN32
WSAInitializer Socket::m_winsock_init;
#endif

通过在Socket.h中声明

static WSAInitializer m_winsock_init