code: def serve_forever(self, fork=False):
  		
  		if fork:
  			if not hasattr(os, 'fork'):
  				raise OSError('os.fork is not available')
  			child_pid = os.fork()
  			if child_pid != 0:
  				self.logger.info('forked child process: ' + str(child_pid))
  				return child_pid
  		self.__server_thread = threading.current_thread()
  		self.__wakeup_fd = WakeupFd()
  		self.__is_shutdown.clear()
  		self.__should_stop.clear()
  		self.__is_running.set()
  		while not self.__should_stop.is_set():
  			try:
  				self._serve_ready()
  			except socket.error:
  				self.logger.warning('encountered socket error, stopping server')
  				self.__should_stop.set()
  		self.__is_shutdown.set()
  		self.__is_running.clear()
  		return 0
docs: Start handling requests. This method must be called and does not
  		return unless the :py:meth:`.shutdown` method is called from
  		another thread.
  
  		:param bool fork: Whether to fork or not before serving content.
  		:return: The child processes PID if *fork* is set to True.
  		:rtype: int