Hi All, I've done some work recently making some of our image analysis library callable from R and Splus. Most of the C image functions use an abstract data type, and R only sees a pointer to this. All memory allocation is done by the library. This leads to some interesting problems. I'm interested in your views about possible solutions. 1) assignment. something like a<-b, where a and b are image pointers will only copy the pointer, not the image. We'd like to overload the <- operator to call the library copy routine. 2) garbage collection. It is now easy to lose track of memory, and this is likely to be significant because images are usually quite big. There is a delete function in the library, so it is possible to dispose of images manually, but an automated method would be nice. One option is to keep a global list of all pointers returned from C function calls, generate a list of all image class objects visible in R and compare the two. Any pointers not on the image class list can be disposed. Does anyone have any other ideas? All advice welcome.
Richard Beare Richard.Beare@cmis.csiro.au -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._