If you have the interest in discovering more, given that you already have a solution, then you could try installing the latest CPAN version (1.63) and see if that also cures the problem with using threads->self().

I have 1.63 installed and it's not an easy task to back that out, but if that cures the problem for you it's probably safe to conclude it is a old problem that has already been fixed.

Strange that I never encountered it in the couple of years that I've been using 5.8.6/5.8.8, but then I always use threads->self->tid for identification purposes and have never had reason to obtain or reference a thread handle from within it's own thread procedure.

As I mentioned, there is a certain logic to it. If the thread procedure contains a reference to itself, then you have a circular reference, and that is a well-known problem that prevents destructors being called.

I wonder how they cured it? The usual method is to weaken the reference (artificially drop the reference count), but looking inside 1.63 they appear to mortalise before returning it--which I thought meant that the ref count was increased? But then, there is a bunch of the internal shenanigans that is tantamount to black magic as far as my understanding goes.


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.
"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

In reply to Re^7: Hanging Threads by BrowserUk
in thread Hanging Threads by WalkingZero

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.