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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
import os
import sys
import unittest
from pathlib import Path
sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
from init_paths import init_test_paths
init_test_paths(False)
from PySide6.QtCore import (QMutex, QMutexLocker, QReadLocker, QReadWriteLock,
QThread, QWriteLocker)
class MyWriteThread(QThread):
def __init__(self, lock):
super().__init__()
self.lock = lock
self.started = False
self.canQuit = False
def run(self):
self.started = True
while not self.lock.tryLockForWrite():
pass
self.canQuit = True
self.lock.unlock()
class MyReadThread(QThread):
def __init__(self, lock):
super().__init__()
self.lock = lock
self.started = False
self.canQuit = False
def run(self):
self.started = True
while not self.lock.tryLockForRead():
pass
self.canQuit = True
self.lock.unlock()
class MyMutexedThread(QThread):
def __init__(self, mutex):
super().__init__()
self.mutex = mutex
self.started = False
self.canQuit = False
def run(self):
self.started = True
while not self.mutex.tryLock():
pass
self.mutex.unlock()
self.canQuit = True
class TestQMutex (unittest.TestCase):
def testReadLocker(self):
lock = QReadWriteLock()
thread = MyWriteThread(lock)
with QReadLocker(lock):
thread.start()
while not thread.started:
QThread.msleep(10)
self.assertFalse(thread.canQuit)
self.assertTrue(thread.wait(2000))
self.assertTrue(thread.canQuit)
def testWriteLocker(self):
lock = QReadWriteLock()
thread = MyReadThread(lock)
with QWriteLocker(lock):
thread.start()
while not thread.started:
QThread.msleep(10)
self.assertFalse(thread.canQuit)
self.assertTrue(thread.wait(2000))
self.assertTrue(thread.canQuit)
def testMutexLocker(self):
mutex = QMutex()
thread = MyMutexedThread(mutex)
with QMutexLocker(mutex):
thread.start()
while not thread.started:
QThread.msleep(10)
self.assertFalse(thread.canQuit)
self.assertTrue(thread.wait(2000))
self.assertTrue(thread.canQuit)
def testWithAsLocker(self):
lock = QReadWriteLock()
with QReadLocker(lock) as locker:
self.assertTrue(isinstance(locker, QReadLocker))
with QWriteLocker(lock) as locker:
self.assertTrue(isinstance(locker, QWriteLocker))
mutex = QMutex()
with QMutexLocker(mutex) as locker:
self.assertTrue(isinstance(locker, QMutexLocker))
with self.assertRaises(TypeError):
with QMutexLocker(lock) as locker:
pass
if __name__ == '__main__':
unittest.main()
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