If I remeber what I've read correctly (and if I haven't someone will let me know), if you are just calling a subroutine the memory should be released when the subroutine is finished. If it isn't you can use the G_EVAL flag which will make sure the memory is released.

If perl does keep the memory contents, when you pass your pointer it should overwrite the memory contents with your new info, or take advantage of the fact and just send the info that needs updating (you will need to change the perl script to accept this).

I do not have the time to write a test script, but if you do try these suggestions I would be interested in finding out how it works.

In reply to Re: Passing reference to perl from C code by c-era
in thread Passing reference to perl from C code by Anonymous Monk

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.