lua调用dll demo

使用的是lua5.3

DllMain.cpp

//生成的dll  是   lua_add53.dll
//luaopen_lua_add
extern "C" {
#include "F:/lua_src/lua-5.3.5_Win64_vc15_lib/include/lua.h"  
#include "F:/lua_src/lua-5.3.5_Win64_vc15_lib/include/lualib.h"  
#include "F:/lua_src/lua-5.3.5_Win64_vc15_lib/include/lauxlib.h"
};
#pragma comment(lib, "F:/lua_src/lua-5.3.5_Win64_vc15_lib/lua53.lib")

#include <iostream>  
using namespace std;

extern "C" int ShowMsg(lua_State* luaEnv) {
  cout << "Hello world from clibs!" << endl;
  return 0; // 返回值个数为0个.  
}

extern "C" int sub2(lua_State* L)
{
  double op1 = luaL_checknumber(L, 1);
  double op2 = luaL_checknumber(L, 2);
  int temp = op1 - op2;
  lua_pushnumber(L, temp);
  return 1;
}

// part one: 要导出的函数列表
static luaL_Reg luaLibs[] = {
    { "ShowMsg", ShowMsg},
    { "sub2", sub2},
    { NULL, NULL }
};

// part two: DLL入口函数，Lua调用此DLL的入口函数.  
extern "C" __declspec(dllexport)
int luaopen_lua_add(lua_State* luaEnv) {   //WinFeature是modole名, 将来require这个名字
  //lua_register(luaEnv, "ShowMsg", ShowMsg);  //关键一行, 在luaState上注册好这个lib
  //lua_register(luaEnv, "sub2", sub2);  //关键一行, 在luaState上注册好这个lib
  lua_newtable(luaEnv);
  luaL_setfuncs(luaEnv, luaLibs,0);
  return 1;
}

编译后是 lua_add53.dll

lua

local mytest = require "lua_add"
mytest.ShowMsg();
print(mytest.sub2(1,2));