Bill Moseley <[EMAIL PROTECTED]> writes: >I have an xsub that doesn't work under 5.00503 because is uses call_pv >instead of perl_call_pv. I must of missed something somewhere -- what's >the method to make the code work in different versions of perl? > >I added: > >#ifndef call_pv ># define call_pv(i,j) perl_call_pv(i,j) >#endif
If you ever have threads or multiplicity that needs to be #ifndef call_pv # define call_pv(i,j) perl_call_pv(aTHX_ i,j) #endif and you need to have a conext arg in scope - i.e. a dTHX to fetch it or a pTHX to pass it in to the caller (XSubs have one to hand). It was to hide all that noise that call_pv() was invented. I consider it a mixed blessing - its magical calling of "get context" can become resource hog. Doing it the old way with perl_call_pv() and "explicit" aTHX_ not only works on older perl's but can give better code on modern ones. (The PERL_NO_GET_CONTEXT mentioned in another thread turns off the magical fetching and requires you to have dTHX / pTHX but still supplies the aTHX as required.) dTHX - declare THread conteXt. pTHX - prototype THread conteXt. aTHX - actual/argument THread conteXt. -- Nick Ing-Simmons http://www.ni-s.u-net.com/
