How to set a Perl environment variable from an XSUB?...

The relationship between MULTIPLICITY and PERL_IMPLICIT_CONTEXT...

What does flag `pIOK` mean?...

How to get access to current context from XS?...

Why callback is not called?...

How to find current package name from perl XS?...

Where I can find the types of op that are filtered by PL_check?...

Should I call SvREFCNT_dec() on a SV that is not going to be returned to Perl on the stack?...