Class: ConcurrentWorker::IPCDuplexChannel

Inherits:
Object
  • Object
show all
Defined in:
lib/concurrent_worker/common.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ IPCDuplexChannel

Returns a new instance of IPCDuplexChannel.



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# File 'lib/concurrent_worker/common.rb', line 50

def initialize
  @p_pid = Process.pid
  @p2c = IO.pipe('ASCII-8BIT', 'ASCII-8BIT')
  @c2p = IO.pipe('ASCII-8BIT', 'ASCII-8BIT')
end

Instance Method Details

#choose_io ⇒ Object 



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# File 'lib/concurrent_worker/common.rb', line 56

def choose_io
  w_pipe, r_pipe = @p_pid == Process.pid ? [@p2c, @c2p] : [@c2p, @p2c]
  @wio, @rio = w_pipe[1], r_pipe[0]
  [w_pipe[0], r_pipe[1]].map(&:close)
end

#close ⇒ Object 



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# File 'lib/concurrent_worker/common.rb', line 86

def close
  [@wio, @rio].map(&:close)
end

#recv ⇒ Object 



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# File 'lib/concurrent_worker/common.rb', line 73

def recv
  begin
    Thread.handle_interrupt(Object => :on_blocking) do
      szdata = @rio.read(4)
      return [] if szdata.nil?
      size = szdata.unpack("I")[0]
      Marshal.load(@rio.read(size))
    end
  rescue IOError
    raise StopIteration
  end
end

#send(obj) ⇒ Object 



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# File 'lib/concurrent_worker/common.rb', line 62

def send(obj)
  begin
    Thread.handle_interrupt(Object => :never) do
      data = Marshal.dump(obj)
      @wio.write([data.size].pack("I"))
      @wio.write(data)
    end
  rescue Errno::EPIPE
  end
end