If your goal is to perform multithreaded computations, why not perform all necessary interactions with R upfront and then compute only on primitives? It would help for us to understand your use case.
On Fri, Nov 1, 2019 at 4:26 AM Jan Gorecki <j.gore...@wit.edu.pl> wrote: > > Dear R developers, > > Motivated by discussion about checking inheritance of S3 and S4 > objects (in head matrix/array topic) I would light to shed some light > on a minor gap about that matter in R C API. > Currently we are able to check inheritance for S3 class objects from C > in a robust way (no allocation, thread safe). This is unfortunately > not possible for S4 classes. I would kindly request new function in R > C api so it can be achieved for S4 classes with no risk of allocation. > For reference mentioned functions below. Thank you. > Jan Gorecki > > // S3 inheritance > bool INHERITS(SEXP x, SEXP char_) { > SEXP klass; > if (isString(klass = getAttrib(x, R_ClassSymbol))) { > for (int i=0; i<LENGTH(klass); i++) { > if (STRING_ELT(klass, i) == char_) return true; > } > } > return false; > } > // S4 inheritance > bool Rinherits(SEXP x, SEXP char_) { > SEXP vec = PROTECT(ScalarString(char_)); > SEXP call = PROTECT(lang3(sym_inherits, x, vec)); > bool ans = LOGICAL(eval(call, R_GlobalEnv))[0]==1; > UNPROTECT(2); > return ans; > } > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel -- Michael Lawrence Senior Scientist, Bioinformatics and Computational Biology Genentech, A Member of the Roche Group Office +1 (650) 225-7760 micha...@gene.com Join Genentech on LinkedIn | Twitter | Facebook | Instagram | YouTube ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel