XS Extending Question

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hi everyone, I have started work on a module to interface the Lotus C API (Lotus Notes / Domino) from Perl. I want to store handles / error msg / other values using each object's IVX, NVX and/or PVX slots depending on the object. So, for example lets say I have this:

$ns = Notes::Session->new();
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In the XS function I bless the reference into "Notes::Session", set flags and return it on the stack. I would like to put a global session count into that object's IVX slot and could then have another function to access it (say Notes::Session::session_count or $ns->session_count()). After having blessed the SV into a package (making it an "object") however, it seems I can't use any of the sv_set*v() functions to change those values as the object gets DESTROYed().
Is it possible to change an object's slots like this? If so, how?

Thanks and best regards, Christian Cloutier.

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Re: XS Extending Question by diotalevi (Canon) on Feb 17, 2003 at 23:49 UTC
First see DominoPerl where I started work on this project. The best approach to this is likely via Inline::C over the C++ interface - it has most of the really nice convenience functions so you don't have to deal with composite data records directly (always a plus). The other part - you're abusing the object. Stop it. You'll want to have Notes::Session be a singleton object and quit it with doing all the work in XS. You'll be much happier if you just wrap the basic API using Inline::C or XS and delegate all the other stuff to perl code. About the referenced code - I'd like to pick it back up one of these days and I've described to you how I think it's best done. (as in, that's my web site I pointed you towards). Send me an e-mail if you want more detail. (or post another node. Whatever works) Seeking Green geeks in Minnesota	[reply]

Replies are listed 'Best First'.

Re: XS Extending Question
by diotalevi (Canon) on Feb 17, 2003 at 23:49 UTC

First see DominoPerl where I started work on this project. The best approach to this is likely via Inline::C over the C++ interface - it has most of the really nice convenience functions so you don't have to deal with composite data records directly (always a plus).

The other part - you're abusing the object. Stop it. You'll want to have Notes::Session be a singleton object and quit it with doing all the work in XS. You'll be much happier if you just wrap the basic API using Inline::C or XS and delegate all the other stuff to perl code.

About the referenced code - I'd like to pick it back up one of these days and I've described to you how I think it's best done. (as in, that's my web site I pointed you towards). Send me an e-mail if you want more detail. (or post another node. Whatever works)

Seeking Green geeks in Minnesota

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