[ruby-talk:01760] Re: idiom for timeout?

The following message is a courtesy copy of an article
that has been posted to comp.lang.misc as well.

Hugh Sasse Staff Elec Eng <[e-mail]> writes:

> Is there a correct Ruby idiom for timing out an operation?  There seems
> to be no alarm function in Ruby, so I cannot do it the Perl way:

You could use lib/timeout.rb:

   require 'timeout'
   status = timeout(5) {
     # something may take time
   }

> (to quote the Perl Cookbook).  I suppose one could do it with a call to 
> fork, have the parent send signal 0 to the child to see if it still lives,
> and repeat this every (short time) until the child dies or the timeout
> is reached.  If I can do this without the fork it would be better though.
> Is there a better way?

It uses threads, which are more efficient, but the principle's the
same.

Regards

Dave