Displaying 1 result from an estimated 1 matches for "ptr_attribut".
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ptr_attribute
2011 Dec 28
1
external pointers
...9;ve noted that
"external pointers should only be used as part of an object with normal
semantics, for example an attribute or an element of a list." So I've
written up a workable C function as such:
SEXP my_c_function(SEXP param) {
SEXP temp = getAttrib(param, install("ptr_attribute"));
void * ptr = R_ExternalPtrAddr(temp);
... // do useful things with ptr
}
I can pass my_c_function() an object with "normal" semantics (such as an
integer vector), where the external pointer object is a parameter named
"ptr_attribute". The function extract...