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- Subject: alien attacks SDL
- From: Martin <wtxnh-lua@...>
- Date: Thu, 4 Sep 2008 03:41:33 +0200
I liked Michal Kolodziejczyk demonstration of using SDL library with
alien module so I have changed and extend it a little and here is my
One thing that bother me is that I can not find why game always end
with segmentation fault when I am closing it! What is strange it
segfault after last command in the game is executed. I strongly
suspect it has to do something with memory management but can not
figure out a cure. Any suggestion?
While working with alien there was several questions I could not
answer. When defining prototype how do I indicate unsigned integers
of all kind:
SDL.SDL_FillRect:types("int", "pointer", "pointer", "unsigned int")
Also while trying struct.unpack I missed a possibility to unpack
pointer as light userdata, I resolved this with buff:get(5, "pointer").
And lastly when I allocate a buffer with alien.buffer() how do I free
it? I guess this can be reason why my program ends with segmentation
fault, because I allocate buffers on several places but never free any
of them. Or does garbage collector take care of them?
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