| 8 | |
| 9 | @threading_helper.reap_threads |
| 10 | def test_reversed(self): |
| 11 | # Iterating over the iterator with multiple threads should not |
| 12 | # emit TSAN warnings |
| 13 | number_of_iterations = 10 |
| 14 | number_of_threads = 10 |
| 15 | size = 1_000 |
| 16 | |
| 17 | barrier = Barrier(number_of_threads) |
| 18 | def work(r): |
| 19 | barrier.wait() |
| 20 | while True: |
| 21 | try: |
| 22 | l = r.__length_hint__() |
| 23 | next(r) |
| 24 | except StopIteration: |
| 25 | break |
| 26 | assert 0 <= l <= size |
| 27 | x = tuple(range(size)) |
| 28 | |
| 29 | for _ in range(number_of_iterations): |
| 30 | r = reversed(x) |
| 31 | worker_threads = [] |
| 32 | for _ in range(number_of_threads): |
| 33 | worker_threads.append(Thread(target=work, args=[r])) |
| 34 | with threading_helper.start_threads(worker_threads): |
| 35 | pass |
| 36 | barrier.reset() |
| 37 | |
| 38 | if __name__ == "__main__": |
| 39 | unittest.main() |