Re: [Tinycc-devel] make tcc reentrant

[uso ewin]

On Tue, Dec 3, 2019 at 11:02 AM Ulrich Schmidt <address@hidden> wrote:
>
> Thank you, Sean. I'l take a look.
>
> Your Idea of making tcc_relocate_ex() global is probably worth thinking
> about.
>
> I wrote my own binding and ran into trouble like you did and i
> understood not enouth about tcc internals. (TCC doc is not the best
> source of information.) Hence i looked into the sources and figured out:
>
> If more than one app uses libtcc, the compilation processes interfere
> with each other causing compilation faults. If you use libtcc only once
> at a time, all is fine.
>
>  From my point of view a lua module needs to usable multiple times parallel.
>
> Ulrich.
>

For parallel it could be possible to optionally change global as
_Thread_local variable,
this will make tcc unable to compile itself if the option is enable,
as it didn't support _Thread_local,
but could be easier than making tcc reentrant, I don't know which
approach is better
but maybe it's worth thinking about this option too.

about reentrantcy, I'm not a maintainer either, I'm not against this
change, as it's a big change
maybe it's possible to make this in an incremental way by first making
small patchs that will
move the global to TCCState.

Also I like the idea of a freeze in order to release a 0.28  soon

Matthias,

> Am 03.12.2019 um 10:09 schrieb Sean Conner:
> > It was thus said that the Great Ulrich Schmidt once stated:
> >> Hi all.
> >>
> >> i try to write a lua binding for tcc. To work out propperly, the tcc lib
> >> needs to be reentrant.
> >    I never had a problem with TCC not being reentrant when I made my Lua
> > bindings for it (way back in 2012 [1]).  But then again, I never really used
> > this module for production work.  If you are intersted:
> >
> >       The C code wrapper:
> >
> >               https://github.com/spc476/lua-conmanorg/blob/master/src/tcc.c
> >
> >       The Lua module which uses the above module to load C-based Lua
> > modules via source code:
> >
> >       https://github.com/spc476/lua-conmanorg/blob/master/lua/cc.lua
> >
> >    -spc (Hope it helps some ... )
> >
> > [1]   Here's the thread where I first bring it up:
> >
> >       
> > https://lists.nongnu.org/archive/html/tinycc-devel/2012-08/msg00001.html
> >
> >
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