new_contents: import asyncio
  import ctypes
  import os
  import time
  
  
  clib = ctypes.CDLL('libc.so.6', use_errno=True)
  
  
  class timespec(ctypes.Structure):
      _fields_ = [('tv_sec', ctypes.c_long),
                  ('tv_nsec', ctypes.c_long)]
  
  
  class itimerspec(ctypes.Structure):
      _fields_ = [('it_interval', timespec),
                  ('it_value', timespec)]
  
  timerfd_create = clib.timerfd_create
  timerfd_create.argtypes = [ctypes.c_int, ctypes.c_int]
  
  timerfd_settime = clib.timerfd_settime
  timerfd_settime = [ctypes.c_int, ctypes.c_int,
                     ctypes.POINTER(itimerspec), ctypes.POINTER(itimerspec)]
  
  TFD_NONBLOCK = os.O_NONBLOCK
  CLOCK_MONOTONIC = time.CLOCK_MONOTONIC
  
  
  
subject: Add timerfd example