Re: modules and C

Re: modules and C

[dsmich]

---- David Fang <fang@csl.cornell.edu> wrote: 
> Hi,
> 	I'm having a bit of trouble using a symbol I defined in C from a
> module:

 ....
> What do I need to do to export my scm_c_define_gsubr'd
> functions to the module?  Must I wrap them into another module in C, and
> use-module it?  (Would I expect the same problem with mixing
> load-extensions with modules?)
> 
> I've been reading the manuals and info on the module's sections and didn't
> find a satisfactory answer.  (Is this a 'quirk?')  What basic concept(s)
> am I missing here?  Thanks in advance!

You will want to read about scm_c_export() and scm_c_call_with_current_module in http://www.gnu.org/software/guile/manual/html_node/Dynamic-Linking-and-Compiled-Code-Modules.html
and http://www.gnu.org/software/guile/manual/html_node/Accessing-Modules-from-C.html

-Dale



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Re: modules and C,C++

[David Fang]

>  ....
> > What do I need to do to export my scm_c_define_gsubr'd
> > functions to the module?  Must I wrap them into another module in C, and
> > use-module it?  (Would I expect the same problem with mixing
> > load-extensions with modules?)
>
> You will want to read about scm_c_export() and scm_c_call_with_current_module in http://www.gnu.org/software/guile/manual/html_node/Dynamic-Linking-and-Compiled-Code-Modules.html
> and http://www.gnu.org/software/guile/manual/html_node/Accessing-Modules-from-C.html

Thanks for the pointer.  What I ended up doing was wrapping the
scm_c_define_gsubr initialization routine (along with scm_c_export's)
inside a scm_c_define_module("foo bar-primitives", ...) to distinguish the
primitives from the non-primitives in a pure scheme module that calls the
primitives.  This way I don't end up throwing things into the default
(guile-user) top module.  Works quite well.

Fang



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