Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?

Comment on

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

Hello Stefan!

The thing with a fork()'d model is that the operating system is creating two additional and separate processes. While they initially have (nearly) the same state as the parent, they are in fact separate, and any changes to memory (i.e., variables) in one will have no effect on the other processes, just as you would expect with any other distinct process.

All is not lost: you will need to use some form of inter-process communication (IPC) to allow your processes to communicate their results to the parent. If you are in a POSIX environment (likely, if you are using fork()), you might have a look at IPC::SysV and IPC::Msg for a start, and do some searching on for other IPC modules best suited to what you need to do.

Finally, is there a special reason you actually need a fork()'d model in the first place? Can you use threads instead? Perl's threads implementation makes shared variables and semaphores between threads very easy.

In reply to Re: Perl fork childs with variables by rjt
in thread Perl fork childs with variables by adiuva

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, 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?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others wandering the Monastery: (4)
    As of 2018-01-23 00:56 GMT
    Find Nodes?
      Voting Booth?
      How did you see in the new year?

      Results (238 votes). Check out past polls.