如何干净地结束 Lua 线程?

问题描述

我的情况是我使用 Lua (C) API 来执行保存在字符串中的脚本.我希望用户能够终止脚本的执行(如果脚本包含无限循环，这是必不可少的)，我该怎么做?

My situation is that I'm using the Lua (C) API to execute a script held in a string. I would like the user to be able to terminate the execution of the script (this is essential if the script contains an infinite loop), how can I do this?

lua_State *Lua = lua_open();
char * code;
// Initialisation code
luaL_dostring(L, code);

推荐答案

你可以使用钩子在每次 lua 执行一行脚本时回调到 C.在这个钩子函数中，你可以检查用户是否想退出，如果他们想退出就调用 lua_error.

You can use a hook to callback to C every time lua executes a line of the script. In this hook function you can check if the user wanted to quit, and call lua_error if they did.

static bool ms_quit = false;

void IWantToQuit()
{
    ms_quit = true;
}

void LineHookFunc(lua_State *L, lua_Debug *ar)
{
    if(ar.event == LUA_HOOKLINE)
        if(ms_quit == true)
            luaL_error(L, "Too Many Lines Error");
}
//...

lua_State *Lua = lua_open();
char * code;
// Initialisation code
lua_sethook(Lua, &LineHookFunc, LUA_MASKLINE, 0);
luaL_dostring(L, code);

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