On Mon, May 13, 2013 at 2:58 AM, Kubilay Kaan <[email protected]> wrote: > [ ... C++ code omitted ...] > > So, this is the Code behind my dll. And I would bind this MyObj to a racket > object. How can I achieve this?
I was afraid you were trying to use C++ when you mentioned objects. Unfortunately the ABI for C++ isn't standardized, and different compilers do different things. That makes it challenging to even figure out what symbol to use for functions. libffi, which Racket uses for making foreign function calls, doesn't have any support for C++. You've got a number of options, none of them particularly appealing: 1) Rewrite the C++ as C. You can always do "pseudo" objects in C. (See gtk) 2) Write a C wrapper for the C++. You can compile it alongside the C++, so long as you indicate you want C linkage for the relevant functions. See: http://stackoverflow.com/questions/1041866/in-c-source-what-is-the-effect-of-extern-c for some explanation 3) I believe SWIG can generate wrappers for C++ libraries. http://www.swig.org/ 4) If you know you only need to deal with the library as compiled by a single compiler, you could inspect the DLLs produced, figure out the symbols, and invoke them as though they're C functions. That might work; I'm not sure what of the ramifications would be. The Haskell wiki discusses doing this in Haskell: http://www.haskell.org/haskellwiki/CPlusPlusFromHaskell For more background than you'll probably want, Agner Fog has a document on the various C++ ABIs: http://www.agner.org/optimize/ -- Jay Kominek ____________________ Racket Users list: http://lists.racket-lang.org/users
