如何在lua cpp模块中调用托管c++ dll函数

说明：

所有的函数都在C＃dll项目中定义，然后我将c＃函数封装到cpp库项目中，现在我想编写一个使用c++编写的lua模块，并调用封装函数。

问题：

如何在lua cpp模块中调用包装器函数？请给我一些建议，谢谢！

代码：

1. libutilscore项目(C#DLL)

    namespace libutilscore
    {
        public static class SharpFTP
        {
            public static string ShowHello()
            {
                return "Hello From C Sharp.";
            }
        }
     }
   

2. ManagedDll项目(C++ DLL)

   • ManagedDll.h

     #pragma once
     #ifdef MANAGEDDLL_EXPORTS
     #define MANAGEDDLL_API __declspec(dllexport)
     #else
     #define MANAGEDDLL_API __declspec(dllimport)
     #endif
     
     MANAGEDDLL_API const char *CPP_ShowHello();
     

   • ManagedDll.cpp

     #include "ManagedDll.h"
     #include <string>
     using namespace System;
     using namespace std;
     using namespace libutilscore;
     
     namespace ManagedDll
     {
        public ref class CS_FTP
        {
            public:
               static string CS_ShowHello()
               {
                   String ^ message = libutilscore::SharpFTP::ShowHello();
                   string result = "";
                   MarshallString(message, result);
                   return result;
               }
            private:
               static void MarshallString(String ^csstr, string &stdstr)
               {
                   using namespace Runtime::InteropServices;
                   const char *chars = (const char*)(Marshal::StringToHGlobalAnsi(csstr)).ToPointer();
                   stdstr = chars;
                   Marshal::FreeHGlobal(IntPtr((void *)chars));
               }
     
               static void MarshallWstring(String ^csstr, string &wstr)
               {
                   using namespace Runtime::InteropServices;
                   const char *wchars = (const wchar_t*)(Marshal::StringToHGlobalAnsi(csstr)).ToPointer();
                   wstr = wchars;
                   Marshal::FreeHGlobal(IntPtr((void *)wchars));
               }
         };
     }
     
     MANAGEDDLL_API string CPP_ShowHello()
     {
         return ManagedDll::CS_FTP::CS_ShowHello();
     }
     

     1. libutils项目(LuaCPP模块)

   • libutils.h

     #pragma once
     
     #ifdef LIBUTILS_EXPORTS
         #define LIBUTILS_API __declspec(dllexport)
     #else
         #define LIBUTILD_API __declspec(dllimport)
     #endif // LIBUTILS_EXPORTS
     

   • libutils.cpp

     #include "libutils.h"
     #include "lua.hpp"
     
     LIBUTILS_API int showHello(lua_State *luaEnv)
     {
         const char *msg = "";
         // TODO 调用DLL函数
         // msg = CPP_ShowHello().c_str();
         lua_pushstring(luaEnv, msg);
         return 1;
     }
     
     static const luaL_Reg libutils_funcs[] = {
         {"showHello", showHello},
         {"NULL", NULL}
     };
     
     LIBUTILS_API int luaopen_libutils(lua_State *luaEnv)
     {
         luaL_newlib(luaEnv, libutils_funcs);
         return 1;
     }