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Postings from January 2018
I'm trying to reïmplement the general spirit of cv_clone() but
specifically for my different use-case in Future::AsyncAwait; the chunk
of code I copypasted from pad.c in this case is
if(CvNAMED(orig))
CvNAME_HEK_set(new, share_hek_hek(CvNAME_HEK(orig)));
else
CvGV_set(new, CvGV(orig));
I notice that `CvNAME_HEK_set()` is available in cv.h, and feels the
sort of macro that would be public API.
I also notice that it doesn't work. Its definition calls
`unshare_hek()`, which embed.h only defines inside #ifdef PERL_CORE,
meaning it's not visible to XS users. If I simply steal the one-line
#define unshare_hek(a) Perl_unshare_hek(aTHX_ a)
then it appears to work fine, but it makes me feel cautious.
A quick stare around Sub::Util's set_subname implementation doesn't
reveal anything involving HEKs, only GVs, so I don't seem to be able to
gain any insight there.
Should I be using this API?
--
Paul "LeoNerd" Evans
leonerd@leonerd.org.uk | https://metacpan.org/author/PEVANS
http://www.leonerd.org.uk/ | https://www.tindie.com/stores/leonerd/
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