From: Tanaka Akira <akr@...>
Date: 2008-03-18T23:02:24+09:00
Subject: Re: Thread#raise, Thread#kill, and timeout.rb are unsafe

In article <41DCFB5E-7EF8-4A1E-81B7-95A6A7691F04@grayproductions.net>,
  James Gray <james@grayproductions.net> writes:

> Perl went kind-of along these lines around version 5.8, if I recall  
> correctly.  They added "safe signals" which were signals that only  
> interrupted at times when it was safe for them to do so.

It's from 5.7.3.
http://search.cpan.org/dist/perl/pod/perlipc.pod#Deferred_Signals_(Safe_Signals)

> This did have a few weird side-effects though.  For example, running a  
> complex regex would shutoff signal handling for the duration.  That  
> meant you could no longer timeout a regex.

Ruby already defer signal handling same as Perl.
-- 
Tanaka Akira