gistfile1.py

def _queue_get(q, timeout):
  """
  The timeout of Queue.get has a precision of ~16ms on Windows.
  In order to get more precision we poll the last few ms.
  """
  t0 = time.perf_counter()
  SLEEP_PRECISION = time.get_clock_info('monotonic').resolution
  try:
    return q.get(timeout=timeout-SLEEP_PRECISION)
  except queue.Empty:
    pass
  # poll
  t1 = time.perf_counter()
  while 0 < (t0+timeout) - t1:
    try:
      return q.get(block=False)
    except queue.Empty:
      t1 = time.perf_counter()
  # nothing found raise exception
  raise queue.Empty


def _sleep(td):
  """
  Default sleep procedure doesn't always sleep the full amount.
  This sleeps at least t seconds.
  Not sleeping long enough was encountered on windows 10, py3.6

  Default sleep has a precision of ~16ms on Windows.
  In order to get more precision we busy wait the last few ms.
  """
  t0 = time.perf_counter()
  SLEEP_PRECISION = time.get_clock_info('monotonic').resolution
  time.sleep(max(0, td - SLEEP_PRECISION))
  # busy wait
  t1 = t0
  while 0 < (t0+td) - t1:
    t1 = time.perf_counter()