C++ LNK2019

Question

我有一個很奇怪的錯誤（工程類之間）：當我想用SocialServer::Client類從我SocialServer::Server類，連接器扔我兩個LNK2019錯誤：

Error 1 error LNK2019: unresolved external symbol "public: void __thiscall SocialServer::Client::Handle(void)" (?Handle@Client@SocialServer@@QAEXXZ) referenced in function "private: static unsigned int __stdcall SocialServer::Server::listenThread(void *)" (?listenThread@Server@SocialServer@@CGIPAX@Z) C:\Users\benjamin\Documents\Visual Studio 2010\Projects\FCX Social Server\SocialServer Core\Server.obj SocialServer Core 

Error 2 error LNK2019: unresolved external symbol "public: __thiscall SocialServer::Client::Client(unsigned int)" (??0Client@SocialServer@@QAE@I@Z) referenced in function "private: static unsigned int __stdcall SocialServer::Server::listenThread(void *)" (?listenThread@Server@SocialServer@@CGIPAX@Z) C:\Users\benjamin\Documents\Visual Studio 2010\Projects\FCX Social Server\SocialServer Core\Server.obj SocialServer Core 

不過，這些2人失蹤功能得到正確實施：

Client.h

#pragma once 

#include "dll.h" 

namespace SocialServer 
{ 
    class __social_class Client 
    { 
    public: 
     Client(SOCKET sock); 
     ~Client(); 

     void Handle(); 

    private: 
     static unsigned __stdcall clientThread(void* value); 

     SOCKET _socket; 
     uintptr_t _thread; 
     unsigned int _thread_id; 
    }; 
} 

Client.cpp

#pragma once 

#include "Client.h" 

namespace SocialServer 
{ 
Client::Client(SOCKET socket) 
{ 
    this->_socket = socket; 
} 

Client::~Client() 
{ 
} 

void Client::Handle() 
{ 
    std::cout << " New client " << std::endl; 
    this->_thread = _beginthreadex(NULL, 0, Client::clientThread, &this->_socket, CREATE_SUSPENDED, &this->_thread_id); 
    ResumeThread((HANDLE)this->_thread); 
} 

unsigned __stdcall Client::clientThread(void* value) 
{ 
    // Some code to execute here ... 
} 
} 

問題從何而來？

Answer 1

我找到了解決方案。 在由_beginthreadex（）（帶有無符號__stdcall）使用的函數中，總是在最後添加一個返回值。