Module: EM::PidPoller

Defined in:
lib/eventmachine/pid_poller.rb

Class Method Summary collapse

Class Method Details

.on_exit(pid, *a, &b) ⇒ Object 



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# File 'lib/eventmachine/pid_poller.rb', line 3

def self.on_exit pid, *a, &b
  cb = EM::Callback *a, &b
  poller = EM.add_periodic_timer(1) do
    state = process_alive?(pid)
    unless state
      poller.cancel
      cb.call
    end
  end
  cb
end

.process_alive?(pid) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/eventmachine/pid_poller.rb', line 15

def self.process_alive? pid
  Process.kill(0, pid)
  true
rescue Errno::ESRCH
  false
end