Module: EventMachine::Gpio::Callbacks

Included in:
Pin
Defined in:
lib/em-gpio/callbacks.rb

Constant Summary collapse

VALID_ON_OPTIONS = 
[:change, :high, :low]

Instance Method Summary collapse

Instance Method Details

#callback(options = {}, &handler) ⇒ Object 



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# File 'lib/em-gpio/callbacks.rb', line 7

def callback(options={}, &handler)
  callback_wrapper do
    event = options.fetch(:on, :change)
    raise(ArgumentError, "Unknown event #{on.inspect} specified") unless VALID_ON_OPTIONS.include?(event)
    instance_variable_set("@on_#{event}", handler)
  end
  self
end