From: Logan Capaldo <logancapaldo@...>
Date: 2006-09-25T21:40:33+09:00
Subject: Re: alarm?

On Mon, Sep 25, 2006 at 08:21:44PM +0900, Michael P. Soulier wrote:
> But that doesn't tell the OS to send a SIGALRM at a predefined time. I've
> found the timeout library, and implemented what I needed with that, but isn't
> the alarm() system call exposed in Ruby? It is in Perl and Python.
> 
> Thanks,
> Mike
Oops, sorry misunderstood the question. Is this better?
% cat alarm.rb
require 'dl/import'
module Alarm
  extend DL::Importable
  if RUBY_PLATFORM =~ /darwin/
    so_ext = 'dylib'
  else
    so_ext = 'so'
  end
  dlload "libc.#{so_ext}"
  extern "unsigned int alarm(unsigned int)"
end

trap("ALRM") do
  puts "Alarm!"
  exit
end

Alarm.alarm(3)

loop {}

% ruby alarm.rb
Alarm!