|
| 1 | +import logging |
| 2 | +import threading |
| 3 | +import time |
| 4 | + |
| 5 | +logging.basicConfig(level=logging.DEBUG, |
| 6 | + format='(%(threadName)-10s) %(message)s', |
| 7 | + ) |
| 8 | + |
| 9 | +def wait_for_event(e): |
| 10 | + """Wait for the event to be set before doing anything""" |
| 11 | + logging.debug('wait_for_event starting') |
| 12 | + event_is_set = e.wait() |
| 13 | + logging.debug('event set: %s', event_is_set) |
| 14 | + |
| 15 | +def wait_for_event_timeout(e, t): |
| 16 | + """Wait t seconds and then timeout""" |
| 17 | + while not e.isSet(): |
| 18 | + logging.debug('wait_for_event_timeout starting') |
| 19 | + event_is_set = e.wait(t) |
| 20 | + logging.debug('event set: %s', event_is_set) |
| 21 | + if event_is_set: |
| 22 | + logging.debug('processing event') |
| 23 | + else: |
| 24 | + logging.debug('doing other work') |
| 25 | + |
| 26 | + |
| 27 | +e = threading.Event() |
| 28 | +t1 = threading.Thread(name='block', |
| 29 | + target=wait_for_event, |
| 30 | + args=(e,)) |
| 31 | +t1.start() |
| 32 | + |
| 33 | +t2 = threading.Thread(name='non-block', |
| 34 | + target=wait_for_event_timeout, |
| 35 | + args=(e, 2)) |
| 36 | +t2.start() |
| 37 | + |
| 38 | +logging.debug('Waiting before calling Event.set()') |
| 39 | +time.sleep(3) |
| 40 | +e.set() |
| 41 | +logging.debug('Event is set') |
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