Re: lua on ARM7

[bert <bestanf@...>]

Hi Luiz,

Thanks a lot for the helpful comments. I'm now down to 25K of code, after leaving out the standard libraries and the parser (using noparser.c). I didn't do any other modifications to the LUA code yet and I still have to do some testing. 

Bert


Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br> wrote:
>  >     - we don't want to support the lua standard libraries 
>
> Just don't open them.
>
> >     - we don't support dynamic memory allocation and leave out the garbage collector (so we need a special keyword to alloc all memory at boot time) 
>
> Use your own memory allocator that gets memory from a fixed pool allocated
> the first time it is called.
>
> To avoid the garbage collector, you can write stubs for the functions exported
> in lgc.h.
>
> >     - we use int32 instead of float as
>  number type
>
> Edit luaconf.h
>
> >     - we don't support the local keyword or variables that were not explicitly allocated at boot time
>
> Edit llex.c and add a space before "local" in luaX_tokens. But that will
> put all variables as global variables, which probably use more memory
> than local variables...
>
> To forbid creating global variables after boot time, set up a __newindex
> metamethod for _G to raise an error.
>
> > what parts of the LUA source distribution would I need to run the VM on the ARM and what can I leave out?
>
> Try leaving out the parser modules by using etc/noparser.c.
> --lhf

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