bpo-44645: Check for interrupts on any potentially backwards edge (GH-27216) (GH-27235)
(cherry picked from commit d09c13417890427f829e3df297beb0e27133f8f4)
Co-authored-by: Mark Shannon <mark@hotpy.org>
diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index f648a8b..23fe2d3 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -1604,6 +1604,31 @@ def test_interrupt_main_invalid_signal(self):
self.assertRaises(ValueError, _thread.interrupt_main, signal.NSIG)
self.assertRaises(ValueError, _thread.interrupt_main, 1000000)
+ @threading_helper.reap_threads
+ def test_can_interrupt_tight_loops(self):
+ cont = [True]
+ started = [False]
+ interrupted = [False]
+
+ def worker(started, cont, interrupted):
+ iterations = 100_000_000
+ started[0] = True
+ while cont[0]:
+ if iterations:
+ iterations -= 1
+ else:
+ return
+ pass
+ interrupted[0] = True
+
+ t = threading.Thread(target=worker,args=(started, cont, interrupted))
+ t.start()
+ while not started[0]:
+ pass
+ cont[0] = False
+ t.join()
+ self.assertTrue(interrupted[0])
+
class AtexitTests(unittest.TestCase):