From: Alex Katebi <alex.katebi@...>
Date: 2009-02-23T01:51:23+09:00
Subject: Re: Monitor + killing thread => thread in an aborting state

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For one thing you should use ruby 1.9 which uses the OS thread instead of
native ruby threading. The other is when you kill or cancel thread you need
to provide safe areas for your condemned thread to die so resources are
releases if any used.
Look into pthread about canceling.

On Sun, Feb 22, 2009 at 11:34 AM, Christopher Debski <
fantom15@poczta.onet.pl> wrote:

> Hi
> I am using ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32].
> I have made a small program, to see whether killing thread is safe, when
> it is using a monitor.
> I have 3 threads:
> -writer, which changes global resource guarded by monitor
> -interrupter, which kills and spawns writer in a loop
> -main, which only monitors other threads
>
> After a few seconds my program hangs, because kill method does not
> return. Main thread says that the writer thread is in an aborting state.
>
> Sample output:
> writer: ok?
> main: tick writer-#<Thread:0x3b4b1e run> interrupter-#<Thread:0x1a80aea
> run>
> interrupter: kill
> interrupter: join
> interrupter: sleep 1
> interrupter: new
> interrupter: sleep 2
> writer: ok?
> interrupter: kill
> main: tick writer-#<Thread:0x1b66b06 aborting>
> interrupter-#<Thread:0x1a80aea run>
> main: tick writer-#<Thread:0x1b66b06 aborting>
> interrupter-#<Thread:0x1a80aea run>
> main: tick writer-#<Thread:0x1b66b06 aborting>
> interrupter-#<Thread:0x1a80aea run>
> (repeats infinitely)
>
> Is it ruby's bug?
> See attachment for full program source.
>
> Regards,
> Christopher
>
> Attachments:
> http://www.ruby-forum.com/attachment/3328/rubyMon.txt
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

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