text: # Copyright (c) Facebook, Inc. and its affiliates.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  # no unicode literals
  from __future__ import absolute_import, division, print_function
  
  
  interrupted = False
  
  
  def wasInterrupted():
      global interrupted
      return interrupted
  
  
  def setInterrupted():
      global interrupted
      interrupted = True
  
  
  def checkInterrupt():
      """
      If an interrupt was detected, raise it now.
      We use this to defer interrupt processing until we're
      in the right place to handle it.
      """
      if wasInterrupted():
          raise KeyboardInterrupt()
  