Hi, I think you need external pointers: http://cran.r-project.org/doc/manuals/r-release/R-exts.html#External-pointers-and-weak-references The docs also has an example.
See more examples from other R packages here: https://github.com/search?q=R_MakeExternalPtr+user%3Acran&type=Code&utf8=%E2%9C%93 Gabor On Wed, Nov 12, 2014 at 8:36 AM, Zheng Da <zhengda1...@gmail.com> wrote: > Hello, > > I wrote a system to perform data analysis in C++. Now I am integrating > it to R. I need to allocate memory for my own C++ data structures, > which can't be represented by any R data structures. I create a global > hashtable to keep a reference to the C++ data structures. Whenever I > allocate one, I register it in the hashtable and return its key to the > R code. So later on, the R code can access the C++ data structures > with their keys. > > The problem is how to perform garbage collection on the C++ data > structures. Once an R object that contains the key is garbage > collected, the R code can no longer access the corresponding C++ data > structure, so I need to deallocate it. Is there any way that the C++ > code can get notification when an R object gets garbage collected? If > not, what is the usual way to manage memory in R extensions? > > Thanks, > Da > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
