[Larceny-users] sqlite3 FFI

[Ray Racine]

It can be done.  I think the issue had to do with getting the macros to
work in R6RS libraries.  I did redo the define-c-info macro into a R6RS
library as a syntax-case macro.

Since that time I think(?) Larceny has added additional capability
regarding its native explicit-renaming(?) macros inside R6RS libraries.
So other approaches might work as well.

My version of Larceny's FFI inside R6RS Libraries are here.

http://github.com/GreyLensman/rl3/tree/75c05ae3c3e838dace63c18d4c5a95590ed304bb/rl3/ffi

Examples of use are here:

Sockets: 
http://github.com/GreyLensman/rl3/tree/75c05ae3c3e838dace63c18d4c5a95590ed304bb/rl3/io/net/sockets.sls

EPoll:
http://github.com/GreyLensman/rl3/tree/75c05ae3c3e838dace63c18d4c5a95590ed304bb/rl3/io/epoll.sls

The last caveat is the code is Linux specific.  If you are on Windows
for examples you would have to add back a few cond-expands from
Larceny's native version into my ported version.

I'm open to any and all options regarding the RL3 code.



On Sat, 2008-05-24 at 21:49 -0500, Peter Keller wrote:
> On Wed, May 21, 2008 at 06:14:29PM -0400, William D Clinger wrote:
> > That'd be great.  Larceny does indeed have an FFI,
> > which is somewhat documented but not well documented.
> > See http://larceny.ccs.neu.edu/doc/ and specifically
> > http://larceny.ccs.neu.edu/doc/user-manual.chunked/ar01s10.html#id2559833
> 
> So, after some hacking and getting a basic sqlite3 ffi done for r5rs in
> larceny, I've come to realize that functions like (foreign-procedure
> ...) and friends don't seem to exist at all when running larceny in
> -r6rs mode.
> 
> Is it even possible to build C interfaces in r6rs libraries in larceny? At
> this point, I'm stuck.
> 
> Thank you.
> 
> -pete
> 
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