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# Copyright © 2026 Apple Inc.
import threading
import unittest
import mlx.core as mx
import mlx_tests
class TestThreads(mlx_tests.MLXTestCase):
def test_threadlocal_stream(self):
test_stream = mx.new_stream(mx.default_device())
def test_failure():
with self.assertRaises(RuntimeError):
with mx.stream(test_stream):
x = mx.arange(10)
mx.eval(2 * x)
mx.clear_streams()
t1 = threading.Thread(target=test_failure)
t2 = threading.Thread(target=test_failure)
t1.start()
t2.start()
t1.join()
t2.join()
test_stream = mx.new_thread_local_stream(mx.default_device())
def test_success():
with mx.stream(test_stream):
x = mx.arange(10)
mx.eval(2 * x)
self.assertEqual(x.tolist(), list(range(10)))
mx.clear_streams()
t1 = threading.Thread(target=test_success)
t2 = threading.Thread(target=test_success)
t1.start()
t2.start()
t1.join()
t2.join()
if __name__ == "__main__":
mlx_tests.MLXTestRunner()