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# Copyright (c) 2026, Oracle and/or its affiliates.
# SPDX-License-Identifier: LGPL-2.1-or-later
from drgn.helpers.linux.swait import swait_active, swait_for_each_task
from tests.linux_kernel import LinuxKernelTestCase, skip_unless_have_test_kmod
@skip_unless_have_test_kmod
class TestSimpleWaitqueue(LinuxKernelTestCase):
@classmethod
def setUpClass(cls):
super().setUpClass()
cls.swaitq = cls.prog["drgn_test_swaitq"].address_of_()
cls.empty_swaitq = cls.prog["drgn_test_empty_swaitq"].address_of_()
def test_swait_active(self):
self.assertTrue(swait_active(self.swaitq))
self.assertFalse(swait_active(self.empty_swaitq))
def test_swait_for_each_task(self):
self.assertEqual(list(swait_for_each_task(self.empty_swaitq)), [])
self.assertEqual(
list(swait_for_each_task(self.swaitq)),
[self.prog["drgn_test_swaitq_kthread"]],
)
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