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Re^2: Horse Race for linux!

by i5513 (Monk)
on Apr 02, 2012 at 13:43 UTC ( #963010=note: print w/ replies, xml ) Need Help??


in reply to Re: Horse Race for linux!
in thread Horse Race for linux!

Greatful, thanks a lot, I will take a look to the code ! I get a seg fault, while horses are running, some races works fine some others not.

$ LANG=C perl horses_gtk *** glibc detected *** perl: realloc(): invalid pointer: 0x&#65533;&#6 +5533;&#65533;3 *** *** unhandled exception in callback: *** `<span foreground="bl...' is not of type Gtk2::Widget at horses_ +gtk line 209. *** ignoring at horses_gtk line 228. Abortado (`core' generado) $ LANG=C perl horses_gtk Violación de segmento (`core' generado) $ file core core: ELF 64-bit LSB core file x86-64, version 1 (SYSV), SVR4-style, f +rom 'perl horses_gtk' $ ls -lh core -rw------- 1 user group 80M abr 2 15:36 core


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Re^3: Horse Race for linux!
by zentara (Archbishop) on Apr 02, 2012 at 14:21 UTC
    Thanks for the report. Its been a while since I tested it. I just ran it a few times myself, and am getting similar failures. I'll work at it and report any fixes I can find.

    Update: I believe it is a locking problem, as I try to lock a hash acting as a container variable, as in lock $track{$tr}{'go'};

    I was counting on each track to have it's own shared variable, so I thought locking would not be a problem. It didn't seem to matter on a single cpu computer, but now I have a multi-core computer, and it matters. Furthermore, I thought I could lock a portion of the shared hash container %track, but I read in perldoc threads::shared that it causes errors.

    From perldoc threads::shared: You cannot lock the individual elements of a container variable: my %hash :shared; $hash{'foo'} = 'bar'; #lock($hash{'foo'}); # Error lock(%hash); # Works If you need more fine-grained control over shared variable +access, see Thread::Semaphore.
    So it seems this code needs a re-write to make locking work.

    I'm not really a human, but I play one on earth.
    Old Perl Programmer Haiku ................... flash japh
Re^3: Horse Race for linux!
by zentara (Archbishop) on Apr 03, 2012 at 18:30 UTC

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