Thank you Gabor. Yes, I've looked at the Ocaml-R bindings. They are in fact where I got the notion that the integration of two garbage collection systems can be tricky. Guillaume Yziquel, the author of the Ocaml-R bindings wrote to me that:
"As for speed, currently, there's a very inefficient interaction between OCaml's GC and R's GC. If you have n R values that are being held by OCaml, you free each value in O(n), meaning quadratic time to free the whole bunch. There is a solution to this, but I did not find the time to implement it. And of course, the speed is only on the OCaml side, not on the R side." and hence I am especially conscious of the traps for the unwary when integrating two GCs. On Sat, Dec 11, 2010 at 9:19 PM, Gabor Grothendieck <ggrothendi...@gmail.com > wrote: > On Sat, Dec 11, 2010 at 9:04 PM, Jason E. Aten <j.e.a...@gmail.com> wrote: > > I'd like to develop, if there is not one already, an interface between R > > code and Haskell code, to allow R code to call Haskell (compiled) code, > and > > vice-versa. But in the interest of not reinventing the wheel, does > anyone > > on this list know of existing bindings for Haskell code? > > > > There is support for loading plugins in Haskell, and for an eval() like > set > > of functions provided by the Haskell hs-plugin package that evaluates > > arbitrary strings in the IO monad. > > http://www.cse.unsw.edu.au/~dons/hs-plugins/paper/<http://www.cse.unsw.edu.au/%7Edons/hs-plugins/paper/>describes > > this > > functionality. For example: > > > > #include <stdio.h> > > #include "RunHaskell.h" > > > > int main(int argc, char *argv[]) { > > int *p; > > hs_init(&argc, &argv); > > p = hs_eval_i("foldl1 (+) [0 .. 10]"); /* this is Haskell code */ > > printf("%d\n", *p); hs_exit(); > > } > > > > > > > > That said, i don't think it will be that difficutl. But I imagine the > > hardest part of this will be getting the memory management for garbage > > collection right. I thought I would start by looking at how the rJava or > > rJython packages handle memory. If anyone has pointers or advice on > > integrating R's garbage collection with another language's garbage > > collection, I'd welcome suggestions and warnings about pitfalls. > > > > You might look at: > > http://home.gna.org/ocaml-r/ > > -- > Statistics & Software Consulting > GKX Group, GKX Associates Inc. > tel: 1-877-GKX-GROUP > email: ggrothendieck at gmail.com > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
