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Postings from November 2000
I have an existing bit of XS code which worked under Perl 5.005, which I want to upgrade to Perl 5.6, while retaining 5.005 compatibility. The big issue is all the THX-style calls, as well as PERL_SET_CONTEXT and co. There's nothing in the docs, not even describing how to use the things, let alone describing how to use them in a 5.005-compatible way... I know that using the THXo stuff directly is probably not the correct way of doing things, but it's code I inherited, and I can't easily change. FWIW, it's the Perl interface for the Vim editor. It's full of things like (NB: the DYNAMIC_PERL is a misnomer - the whole point is that I'm trying to disentangle the 5.6=isms from the dynamic loading stuff...) #ifdef DYNAMIC_PERL /* TODO: This is for 5.6 */ static void xs_init __ARGS((pTHXo)); #else static void xs_init __ARGS((void)); #endif and a bunch of function pointer definitions like "static I32 (*Perl_call_pv)(pTHX_ const char*, I32);" which are to allow for on-demand dynamic loading of the Perl DLL. It looks to me like I just have to #define pTHXo as void, pTHX as void, and pTHX_ as empty. There's also a #ifdef DYNAMIC_PERL /* is this right? TODO: This is a 5.6-ism... */ PERL_SET_CONTEXT(0); #endif in a perl_end() function, just after perl_run/perl_destruct/perl_free, and before we set perl_interp to NULL. This seems a little late to be useful, but I don't know what PERL_SET_CONTEXT is for, so I could do with some enlightenment... Thanks for any help, Paul Moore.