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//下载lua源代码,编译生成luaXX.lib, luaXX.dll,将这两个文件及lua.h, lualib.h, lauxlib.h, luaconf.h拷贝到程序当前目录
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#include <time.h>
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extern "C"
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{
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#include "lua.h"
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#include "lualib.h"
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#include "lauxlib.h"
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};
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#pragma comment(lib, "lua51.lib") //<加载lua链接库
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lua_State *L; //<创建全局lua对象指针
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long long use_lua_fun(lua_State *L, const char funName[], int a, int b)
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{
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lua_getglobal(L, funName); //<获取函数名称
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lua_pushnumber(L, a); //<压栈第1个参数
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lua_pushnumber(L, b); //<压栈第2个参数
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int ret = lua_pcall(L, 2, 1, 0); //<调用lua脚本函数,2表示有两个个参数,1表示1个返回结果
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if(ret != 0)
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{
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printf("lua_call errors:%d\n ,%s",ret, lua_tostring(L, -1));
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return -1;
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}
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long long sum = (long long)lua_tointeger(L, -1); //<将栈顶转换成longlong型数据
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lua_pop(L, 1); //<弹出第一个元素
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return sum;
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}
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int main()
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{
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int i;
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long long sum = 0;
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L = lua_open(); //<初始化lua对象指针
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luaL_openlibs(L); //<加载lua函数库
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int ret = luaL_dofile(L, "test.lua"); //<加载脚本,如果脚本编译有错误,则加载失败
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if(ret != 0)
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{
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printf("dofile errors:%d %s",ret, lua_tostring(L, -1));
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return 1;
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}
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clock_t start, end;
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start = clock();
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for(i = 0; i < 4000000; i++)
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sum += 1+2;
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end = clock();
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printf("In c++, runing time is %d ms %lld\n",(int)(end - start), sum);
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start = clock();
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sum = use_lua_fun(L, "loopAdd", 1, 2);
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end = clock();
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printf("lua loopAdd function, runing time is %d ms %lld\n",(int)(end - start), sum);
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sum = 0;
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start = clock();
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for(i = 0; i < 4000000; i++)
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sum += use_lua_fun(L, "add", 1, 2);
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end = clock();
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printf("c++ loop lua's add function, runing time is %d ms %lld\n",(int)(end - start), sum);
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lua_close(L); //<关闭lua对象指针
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return 0;
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}
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test.lua 脚本内容如下
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function add(x,y)
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return x+y;
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end
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function loopAdd(x,y)
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local sum = 0
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for i = 1,4000000
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do
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sum = sum + x + y
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end
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return sum
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end
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输出结果
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In c++, runing time is 16 ms 12000000
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lua loopAdd function, runing time is 219 ms 12000000
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c++ loop lua's add function, runing time is 1937 ms 12000000
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