Yet there are quite a few of them on CPAN.

I recall somebody even made a mmap module that works on Win32; the author was here and on the chatterbox while he was working on it, but I don't remember what user that was.

Maybe it was IPC::Mmap? Ah, no, it must have been Win32::MMF, the name rings a bell. Well, both look like reasonable approaches to me, and both have gotten recent updates, which is a promise it'll most likely still work well. But don't discard the other candidates just yet.

From the top of the thread:

I have a hash (with about 20-25 keys) with very long bit strings as values (1-2MB) that I would like to share directly (readonly) in memory.
That looks like an acceptably small number of keys, so the most sane approach to me seem to make a separate mmapped file per hash item. If the keys form a fixed set, you don't even actually have to share the list of names.

In reply to Re^2: Share hash across processes by bart
in thread Share hash across processes by bmac888

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.