Class: Async::Process::Child

Inherits:
Object
  • Object
show all
Defined in:
lib/async/process/child.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args, **options) ⇒ Child 



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# File 'lib/async/process/child.rb', line 9

def initialize(*args, **options)
  # Setup a cross-thread notification pipe - nio4r can't monitor pids unfortunately:
  pipe = ::IO.pipe
  @input = pipe.first
  @output = pipe.last
  
  @exit_status = nil
  
  @pid = ::Process.spawn(*args, **options, pgroup: true)
  
  @thread = Thread.new do
    _, @exit_status = ::Process.wait2(@pid)
    @output.close
  end
end

Instance Attribute Details

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/async/process/child.rb', line 25

def pid
  @pid
end

Instance Method Details

#kill(signal = :TERM) ⇒ Object 



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# File 'lib/async/process/child.rb', line 31

def kill(signal = :TERM)
  ::Process.kill(signal, -@pid)
end

#running? ⇒ Boolean 



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# File 'lib/async/process/child.rb', line 27

def running?
  @exit_status.nil?
end

#wait ⇒ Object 



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# File 'lib/async/process/child.rb', line 35

def wait
  if @exit_status.nil?
    wait_thread
  end
  
  return @exit_status
end