def start_scan(self, period):
self.stop_scan()
event = Event()
scan_thread = Thread(name="usb scan",
target=self._background_scan,
args=[period, event],
daemon=True)
scan_thread.event = event
self.scan_thread = scan_thread
scan_thread.start()
def test_multiple_threads(iterations=120, num_consumers=30):
q = BlockingQueue(iterations)
woken_thread_event = Event()
threads = []
times = []
def _get(iters, ev):
start = time()
for _i in xrange(iters):
q.get()
ev.set()
woken_thread_event.set()
end = time()
times.append(end-start)
iters_per_consumer = iterations/num_consumers
for _i in range(num_consumers):
ev = Event()
tc = Thread(target=_get, args=(iters_per_consumer, ev))
tc.setDaemon(1)
tc.event = ev
threads.append(tc)
for t in threads:
t.start()
assert not times
for i in xrange(iterations):
q.put(i)
woken_thread_event.wait(1)
woken_thread_event.clear()
woken_threads = [t for t in threads if t.event.isSet()]
assert len(woken_threads) == 1, woken_threads
woken_threads[0].event.clear()
for t in threads:
t.join(1)
assert not t.isAlive()
assert len(times) == len(threads)
