Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

Hmm.... thanks for pressing this, demerphq. You appear to be right about not needing so many mortals. I think the trick is to avoid incrementing any refcounts (as I was doing after hv_store()), and only mortalize the RV I am pushing on the stack. This is basically what you said, but the code comes out a bit different from what you said:

AV *arr = newAV(); av_push( arr, newSVpv("test", 0)); XPUSHs(sv_2mortal(newRV_noinc((SV *)arr))); HV *hash = newHV(); hv_store( hash, "key", strlen("key"), newSVpv("test", 0), 0); XPUSHs(sv_2mortal(newRV_noinc((SV *)hash)));

So I'm just creating all "intermediate" variables non-mortals, not incrementing any refcounts after av_push or hv_store(), using newRV_noinc(), and mortalizing just the RV that's pushed on the stack.

Does that seem right? Sure looks cleaner...

--
edan


In reply to Re^6: perlembed: mortalize an AV, get "Attempt to free unreferenced scalar" - don't mortalize, leaks memory by edan
in thread perlembed: mortalize an AV, get "Attempt to free unreferenced scalar" - don't mortalize, leaks memory by edan

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!
  • 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, 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, 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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others drinking their drinks and smoking their pipes about the Monastery: (10)
    As of 2015-07-29 06:16 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









      Results (260 votes), past polls