I had tried, but the SWIG typemaps I have currently did not allow the 'modulename:subname' format to register the callbacks.

I don't understand this. The SWIG stuff wraps the registering of the CCB, not the PCB.

So you "register" the PCB--by storing the SV* you pass into your code. You then call that stored SV* (using call_sv()) when the SWIG stuff calls back you CCB.

I agree that call_sv() should handle coderefs (according to the documentation; I even think I've done it in the past on 5.8x era perls), but every time I've tried it recently, it falls in a heap with coderefs (with or without threads involved), and works as advertised with a function name. So I stick with the latter. It does mean you have to name the callbacks rather than use anonymous subs or blocks, but that is an acceptable limitation (for me).

I having trouble understanding why you cannot do the same?

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
RIP an inspiration; A true Folk's Guy

In reply to Re^18: Perl crash during perl_clone by BrowserUk
in thread Perl crash during perl_clone by perlmonk1729

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.