• Announcements

    • khawk

      Download the Game Design and Indie Game Marketing Freebook   07/19/17

      GameDev.net and CRC Press have teamed up to bring a free ebook of content curated from top titles published by CRC Press. The freebook, Practices of Game Design & Indie Game Marketing, includes chapters from The Art of Game Design: A Book of Lenses, A Practical Guide to Indie Game Marketing, and An Architectural Approach to Level Design. The GameDev.net FreeBook is relevant to game designers, developers, and those interested in learning more about the challenges in game development. We know game development can be a tough discipline and business, so we picked several chapters from CRC Press titles that we thought would be of interest to you, the GameDev.net audience, in your journey to design, develop, and market your next game. The free ebook is available through CRC Press by clicking here. The Curated Books The Art of Game Design: A Book of Lenses, Second Edition, by Jesse Schell Presents 100+ sets of questions, or different lenses, for viewing a game’s design, encompassing diverse fields such as psychology, architecture, music, film, software engineering, theme park design, mathematics, anthropology, and more. Written by one of the world's top game designers, this book describes the deepest and most fundamental principles of game design, demonstrating how tactics used in board, card, and athletic games also work in video games. It provides practical instruction on creating world-class games that will be played again and again. View it here. A Practical Guide to Indie Game Marketing, by Joel Dreskin Marketing is an essential but too frequently overlooked or minimized component of the release plan for indie games. A Practical Guide to Indie Game Marketing provides you with the tools needed to build visibility and sell your indie games. With special focus on those developers with small budgets and limited staff and resources, this book is packed with tangible recommendations and techniques that you can put to use immediately. As a seasoned professional of the indie game arena, author Joel Dreskin gives you insight into practical, real-world experiences of marketing numerous successful games and also provides stories of the failures. View it here. An Architectural Approach to Level Design This is one of the first books to integrate architectural and spatial design theory with the field of level design. The book presents architectural techniques and theories for level designers to use in their own work. It connects architecture and level design in different ways that address the practical elements of how designers construct space and the experiential elements of how and why humans interact with this space. Throughout the text, readers learn skills for spatial layout, evoking emotion through gamespaces, and creating better levels through architectural theory. View it here. Learn more and download the ebook by clicking here. Did you know? GameDev.net and CRC Press also recently teamed up to bring GDNet+ Members up to a 20% discount on all CRC Press books. Learn more about this and other benefits here.
Sign in to follow this  
Followers 0
Liuqahs15

Lua with C++: Program crashes when lua_close() called

2 posts in this topic

After a bit of a struggle, I've gotten Lua to work with [b]Visual Studio 2012 (Lua 5.2)[/b]. Unfortunately, now, when I run some simple test code, it crashes at runtime with an unhandled exception, but only when I call lua_close(). Here's the code:

[CODE]
#include <iostream>
using namespace std;
extern "C"{
#include <lua.hpp>
}
int main()
{

lua_State *L = luaL_newstate();

if(!L)
return -1;

luaL_dostring(
L,
"function add(first, second)\n"
" return first + second\n"
"end\n"
);

lua_close(L); /*Unhandled exception at 0x100042C0 (Lua.dll) in one more gain.exe: 0xC0000005: Access violation writing location 0x6D79F934.*/

cout << "Hello";

system("PAUSE");
return 0;
}
[/CODE]

I've seen that sort of error before. I guess I'm accessing a null pointer? Yes the code gets past if(!L). Does anybody know what's going on?

EDIT: Screenshot added
0

Share this post


Link to post
Share on other sites
Good old "Access Violation Error": Trying to access something that's out of the page or do something that a page isn't authorized for. Sometimes it can be trying to free a pointer that's not allocated. Possibly Lua is being de-initialized and then trying to free an internal pointer or something. If you've got everything set up right then it may actually be a Lua code problem. I had a similar problem with IrrKlang a while back and they fixed it in the next release (after I spent 5 hours trying to find the problem).

Check the Lua site and see if there's a newer version or else maybe a ticket in the bug-tracker.

Apart from that I think we'd need to know more about what's going on at your end. Does the Lua embedding doc say anything about necessary compiler or linker settings? Do you really need to extern "C" an .h[u]PP[/u] file? What is the returned value from dostring()?

Poking around a little on google, do you need to call "luaL_openlibs(L)" after creating the state? Edited by Khatharr
0

Share this post


Link to post
Share on other sites
"it may actually be a Lua code problem"

It's much more likely to be a setup problem.

What does it do if you remove the luaL_dostring?
0

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0