Hello,
In Rcpp, we use a C++ template to finalizers for external pointers:
template <typename T>
void delete_finalizer(SEXP p){
if( TYPEOF(p) == EXTPTRSXP ){
T* ptr = (T*) EXTPTR_PTR(p) ;
delete ptr ;
}
}
This works fine. Or at least it has appeared to work fine for some time.
However, when compiled with suncc, this generates warnings [1] because
the generated function is of C++ linkage and the finalizer type is
declared to have C linkage in Rinternals.h
extern "C" {
...
typedef void (*R_CFinalizer_t)(SEXP);
void R_RegisterFinalizer(SEXP s, SEXP fun);
void R_RegisterCFinalizer(SEXP s, R_CFinalizer_t fun);
void R_RegisterFinalizerEx(SEXP s, SEXP fun, Rboolean onexit);
void R_RegisterCFinalizerEx(SEXP s, R_CFinalizer_t fun, Rboolean onexit);
...
}
Does anyone know a workaround ?
Would using an R finalizer (with R_RegisterFinalizer) using another
external pointer to some class be appropriate ?
Romain
[1] : http://article.gmane.org/gmane.comp.lang.r.rcpp/433
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Romain Francois
Professional R Enthusiast
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http://romainfrancois.blog.free.fr
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