Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

Comment on

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

BrowserUk, thank you!

What I would say; and have said many times; is do not attempt to use fork & the windows signals emulation to try to port *nix idioms to windows; because you will be sadly let down.

Based on this, I will propose an addition to the documentation of function fork (and perhaps also kill) in the Perl Language reference.

You reinvented ... a thread-bomb.

And you are using a random delay -- sleep 0 equates to "relinquish the rest of the current timeslice" which is an unknowable quantum of time, that could range from 0 microseconds

My “thread-bomb” resulted in a patch. The patch http://perl5.git.perl.org/perl.git/commitdiff/82e24582 adds to t/op/fork.t:

+system $^X, "-e", "if (\$pid=fork){sleep 1;kill(9, \$pid)} else {sle +ep 5}";

Is this also a thread-bomb, or is it OK with non zero sleep?

The patch also changes win32/win32.c:

--- a/win32/win32.c +++ b/win32/win32.c @@ -1282,6 +1282,13 @@ win32_kill(int pid, int sig) case 9: /* kill -9 style un-graceful exit */ if (TerminateThread(hProcess, sig)) { + /* Allow the scheduler to finish cleaning up the +other thread. + * Otherwise, if we ExitProcess() before another +context switch + * happens we will end up with a process exit cod +e of "sig" instead + * of our own exit status. + * See also: https://rt.cpan.org/Ticket/Display.h +tml?id=66016#txn-908976 + */ + Sleep(0); remove_dead_pseudo_process(child); return 0; }

Is it OK with “Sleep(0)”, or must it be a non zero parameter value? Can the non zero time value cause that we still sometimes get 9 as an erroneous exit value? What is the smallest non-zero value that can be used?


In reply to Re^4: Threads and signals in Windows by bojinlund
in thread Threads and signals in Windows by bojinlund

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!
  • 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
  • Outside of code tags, you may need to use entities for some characters:
            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?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others lurking in the Monastery: (6)
    As of 2014-07-14 02:20 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      When choosing user names for websites, I prefer to use:








      Results (254 votes), past polls