make non-yielding functions (a little bit) yielding, so that gevent.Timeout somewhat works

gistfile1.txt

import sys
import signal
import gevent
from gevent import get_hub
import traceback

def alarm_handler(*args):
    signal.alarm(1)
    if gevent.getcurrent() is not get_hub():
        get_hub().loop.update_now()
        gevent.sleep(0)


signal.signal(signal.SIGALRM, alarm_handler)
signal.alarm(1)


import time


start = time.time()
with gevent.Timeout(1, False):
    print 'this is yielding code'
    gevent.sleep(5)
print 'interrupted after %s seconds' % (time.time() - start)


start = time.time()
with gevent.Timeout(1, False):
    print 'this is non- yielding code'
    while True:
        x = 1 + 1
print 'interrupted after %s seconds' % (time.time() - start)