Re: Calling Lua from C - have I been doing it wrongly?

[Nick Gammon <nick@...>]

On 15/10/2006, at 9:02 AM, Jérôme VUARAND wrote:

> lua_error function is supposed to be called from a protected call, and
> all luaL_check* functions call it. Instead you can check the stack
> safely with calls to lua_is* and other similar functions. That way you
> don't have to add an additionnal pcall layer. Example:
>
> int main()
> {
>    lua_State* L = luaL_newstate();
>    luaL_openlibs(L);
>    lua_pushcfunction(L, foo);
>    if (lua_pcall(L, 0, 1, 0)==0)

I understand that, and perhaps was in a dream world when I used  
luaL_checkstring, however in your example there is a possibility,  
slight perhaps, that lua_pushcfunction will fail due to being out of  
memory.

Maybe it will happen so infrequently, that we can simply advise the  
users to "turn the power off and on again"  in the 1 time in 10 years  
that it happens. :)

- Nick