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45bfb43b34
Combined backport of PRs from main branch, fixing free-threading data-races in itertools: * gh-123471: make concurrent iteration over `itertools.cycle` safe under free-threading (gh-131212) * gh-123471: Make itertools.product and itertools.combinations thread-safe (GH-132814) * gh-123471: Make itertools.chain thread-safe (gh-135689) * gh-123471: Make concurrent iteration over `itertools.permutations` and `itertools.combinations_with_replacement` thread-safe (gh-144402) * gh-123471: make concurrent iteration over itertools.accumulate thread-safe (gh-144486) * gh-123471: Make `itertools.zip_longest` safe in the FT build (gh-146033) (cherry picked from commit26a1cd4e8c) (cherry picked from commit847d1c2cb4) (cherry picked from commit0533c1faf2) (cherry picked from commit009c8c052f) (cherry picked from commit3a24856447) (cherry picked from commit9214e3f33e) Co-authored-by: Pieter Eendebak <pieter.eendebak@gmail.com> Co-authored-by: Kumar Aditya <kumaraditya@python.org>
51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
import unittest
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from threading import Thread, Barrier
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from itertools import combinations, product
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from test.support import threading_helper
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threading_helper.requires_working_threading(module=True)
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def test_concurrent_iteration(iterator, number_of_threads):
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barrier = Barrier(number_of_threads)
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def iterator_worker(it):
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barrier.wait()
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while True:
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try:
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_ = next(it)
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except StopIteration:
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return
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worker_threads = []
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for ii in range(number_of_threads):
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worker_threads.append(
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Thread(target=iterator_worker, args=[iterator]))
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with threading_helper.start_threads(worker_threads):
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pass
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barrier.reset()
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class ItertoolsThreading(unittest.TestCase):
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@threading_helper.reap_threads
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def test_combinations(self):
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number_of_threads = 10
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number_of_iterations = 24
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for it in range(number_of_iterations):
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iterator = combinations((1, 2, 3, 4, 5), 2)
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test_concurrent_iteration(iterator, number_of_threads)
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@threading_helper.reap_threads
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def test_product(self):
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number_of_threads = 10
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number_of_iterations = 24
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for it in range(number_of_iterations):
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iterator = product((1, 2, 3, 4, 5), (10, 20, 30))
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test_concurrent_iteration(iterator, number_of_threads)
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if __name__ == "__main__":
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unittest.main()
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