Re: [cffi-devel] offer of code contribution - with-array-as-foreign-pointer

On Sat, Sep 11, 2010 at 18:38, JTK <jetmonk@gmail.com> wrote:

I'm using cffi, and I need to perform the common task of passing Lisp arrays to foreign code.

This task comes up a lot in scientific code, matrix math, image processing, etc.

Normally, it involves a lot of boilerplate to allocate a pointer, copy data Lisp  to foreign memory, copy the data back, and deallocate the memory.   Getting the copying to run fast can be tricky.

Hence I wrote a package to automate it.

You might be disappointed (or pleased, perhaps) to see that someone (Tamas K. Papp, in particular) has already done this: http://tkpapp.blogspot.com/2007/12/announcement-ffa.html mfh