使用lua_yield和lua_resume时的核心转储

时间:2013-01-11 06:46:02

标签: lua coroutine

我只想恢复func协程两次,如果n == 0则返回,如果n == 1则返回,但核心转储,它有什么问题?

“hello world”应该总是留在LL的堆栈中,我无法弄清楚出了什么问题。

[liangdong@cq01-clientbe-code00.vm.baidu.com lua]$ ./main 
func_top=1 top=hello world
first_top=1 top_string=hello world
Segmentation fault (core dumped)
[liangdong@cq01-clientbe-code00.vm.baidu.com lua]$ cat main.c 
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"

int n = 0;

int func(lua_State *L) {
    printf("func_top=%d top=%s\n", lua_gettop(L), lua_tostring(L, -1));
    if (!n) {
        ++ n;
        return lua_yield(L, 1);
    } else {
        return 1;
    }
}

int main(int argc, char* const argv[]) {
    lua_State *L = luaL_newstate();

    /* init lua library */    
    lua_pushcfunction(L, luaopen_base);
    if (lua_pcall(L, 0, 0, 0) != 0) {
        return 1;
    }
    lua_pushcfunction(L, luaopen_package);
    if (lua_pcall(L, 0, 0, 0 ) != 0) {
        return 2;
    }

    /* create the coroutine */
    lua_State *LL = lua_newthread(L);

    lua_pushcfunction(LL, func);
    lua_pushstring(LL, "hello world");

    /* first time resume */
    if (lua_resume(LL, 1) == LUA_YIELD) {
        printf("first_top=%d top_string=%s\n", lua_gettop(LL), lua_tostring(LL, -1));
        /* twice resume */
        if (lua_resume(LL, 1) == 0) {
            printf("second_top=%d top_string=%s\n", lua_gettop(LL), lua_tostring(LL, -1));
        }
    }

    lua_close(L);

    return 0;
}

它在lua5.1中的核心转储,但如果将lua_resume(LL,1)更改为lua_resume(LL,NULL,1),则在lua5.2中运行良好。

1 个答案:

答案 0 :(得分:1)

编辑:我其实完全错了。

You cannot resume a C function.