From: Joseph McDonald <joe@...>
Date: 2001-06-30T12:50:30+09:00
Subject: [ruby-talk:17091] ensure block not being executed


Hi,
Am I missing something here?  I run this program and kill it with ^C
but then the ensure block doesn't get called.  I thought ensure was
supposed to be called no matter what.  Am I wrong on this?

Here is the code and the output:

cat junker.rb
#!/usr/local/bin/ruby

require 'sysvipc'
include SystemVIPC

begin
  key = ftok __FILE__, 1

  msq = MessageQueue.new key, 0700 | IPC_CREAT
  
  # enqueue  messages
  0.upto(10) do |x|
    msq.send 100, x.to_s
  end
  
  # dequeue messages
  while (s =  msq.recv 100, 100)
    puts "got: #{s}"
  end
  
  # remove the queue
ensure
  puts "ensure block"
  msq.remove
end


./junker.rb
got: 0
got: 1
got: 2
got: 3
got: 4
got: 5
got: 6
got: 7
got: 8
got: 9
got: 10
^C./junker.rb:23: Interrupt

thanks,
-joe