Hi Gerry, "pointer_to_array" is probably what you're looking for. See http://julia.readthedocs.org/en/latest/manual/calling-c-and-fortran-code/#accessing-data-through-a-pointer for more information.
Cheers, Kevin On Sun, Aug 10, 2014 at 1:17 AM, Gerry Weaver <[email protected]> wrote: > I forgot to mention that I'm trying to accomplish this with arrays right > now. I can pass a Julia array to C and access it there, but I can't figure > out how to convert it back to a Julia array from a C void pointer when > calling back to Julia from C. > > > On Sunday, August 10, 2014 1:57:18 AM UTC-5, Gerry Weaver wrote: >> >> Hello All, >> >> I have a C function called mycfunc that takes a callback function pointer >> (cbfunc) and a void pointer (cbdata) as arguments. mycfunc calls the >> callback function (cbfunc) passing the void pointer (cbdata) as its >> argument. I'm trying to figure out how to pass a Julia type as the void >> pointer argument and convert it back to the Julia type in the Julia >> function passed as the callback function argument. I can do this with a >> simple string, but I'm having some difficulty in figuring out how to do it >> with arrays and other types. Any advice on this would be much appreciated. >> >> >> typedef int (* mycallback)(void *cbdata); >> >> void mycfunc(mycallback cbfunc, void *cbdata) >> { >> cbfunc(cbdata); >> } >> >> Thanks, >> -G >> >> >>
