Hopefull this will help you answer some of your questions

perlapi

sv_setpv     Copies a string into an SV...

sv_setpvn     Copies a string into an SV...

PerlGuts Illustrated

define SvPVX 

  70 /* safe version of free */
  71 
  72 Free_t
  73 safefree(Malloc_t where)
  74 {
  75 #ifdef DEBUGGING
  76     if (debug & 128)
  77         fprintf(stderr,"0x%lx: (%05d) free\n",(unsigned long)wher
+e,an++);
  78 #endif
  79     free(where);
  80 }

[download]

In reply to Re: XS, pointer scope, strings, allocation responsibility, sv_setpv, SvPV, pack's pointer by Anonymous Monk
in thread XS, pointer scope, strings, allocation responsibility, sv_setpv, SvPV, pack's pointer by patcat88

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.