I have some C data I want to pass back to R opaquely, and then back to C. I understand external pointers are the way to do so.
I'm trying to find how they interact with garbage collection and object lifetime, and what I need to do so that the memory lives until the calling R process ends. Could anyone give me some pointers? I haven't found much documentation. An earlier message suggested looking at simpleref.nw, but I can't find that file. So the overall pattern, from R, would look like opaque <- setup(arg1, arg2, ....) # setup calls a C fn docompute(arg1, argb, opaque) # many times. docompute also calls C # and then when I return opaque and the memory it's wrapping get #cleaned up. If necessary I could do teardown(opaque) # at the end "C" is actually C++ via a C interface, if that matters. In particular, the memory allocated will likely be from the C++ run-time, and needs C++ destructors. -- Ross Boylan wk: (415) 514-8146 185 Berry St #5700 [EMAIL PROTECTED] Dept of Epidemiology and Biostatistics fax: (415) 514-8150 University of California, San Francisco San Francisco, CA 94107-1739 hm: (415) 550-1062 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
