Thanks- That looks like it was just the ticket, and the answer to a lot of the other questions I had piling up. <div class="gmail_quote">On Mon, Feb 7, 2011 at 2:03 PM, Jay McCarthy <<a href="mailto:jay.mccarthy@gmail.com">jay.mccarthy@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">The ffi has a directory of examples: <a href="https://github.com/plt/racket/tree/master/collects/ffi/examples" target="_blank">https://github.com/plt/racket/tree/master/collects/ffi/examples</a> and there are many on PLaneT Jay 2011/2/7 Ben Dean <<a href="mailto:benjamin.dean@aya.yale.edu">benjamin.dean@aya.yale.edu</a>>: <div><div></div><div class="h5">> I'm looking to put some Racket wrappers around bits of the OpenCV C api, but > I'm having a hard getting started. I've looked through the ffi/unsafe > documentation several times, but something isn't clicking-- I think I need > to peer at some examples. If anyone has a good example or two of calling C > code from Racket, I'd be much obliged. > In detail, what I imagine is going to happen is that I will be accessing > some (shared?) object files, created as part of the OpenCV build, by calling > (define function-name (get-ffi-obj function-name (ffi-lib lib-name) > format)...) > I'm not clear, however, on what the particular object files I'm looking up > with ffi-lib. I also am unclear about the convention for the function-name > parameter to get-ffi-obj. Is it as simple as a string of the the name that > the C api is exposing? > I hope I've revealed my ignorance appropriately-- if you noticed any other > misconceptions or egregious gaps, please do let me know! > ben </div></div>> _________________________________________________ > For list-related administrative tasks: > <a href="http://lists.racket-lang.org/listinfo/users" target="_blank">http://lists.racket-lang.org/listinfo/users</a> > -- Jay McCarthy <<a href="mailto:jay@cs.byu.edu">jay@cs.byu.edu</a>> Assistant Professor / Brigham Young University <a href="http://faculty.cs.byu.edu/~jay" target="_blank">http://faculty.cs.byu.edu/~jay</a> "The glory of God is Intelligence" - D&C 93 </blockquote></div>