qt 6.5.1 original

tests/auto/corelib/thread/qmutexlocker/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_qmutexlocker Test:
+#####################################################################
+
+qt_internal_add_test(tst_qmutexlocker
+    SOURCES
+        tst_qmutexlocker.cpp
+)

tests/auto/corelib/thread/qmutexlocker/tst_qmutexlocker.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <QTest>
+
+#include <QCoreApplication>
+#include <QMutexLocker>
+#include <QSemaphore>
+#include <QThread>
+
+class tst_QMutexLockerThread : public QThread
+{
+public:
+    QRecursiveMutex mutex;
+    QSemaphore semaphore, testSemaphore;
+
+    void waitForTest()
+    {
+        semaphore.release();
+        testSemaphore.acquire();
+    }
+
+};
+
+class tst_QMutexLocker : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QMutexLockerThread *thread;
+
+    void waitForThread()
+    {
+        thread->semaphore.acquire();
+    }
+    void releaseThread()
+    {
+        thread->testSemaphore.release();
+    }
+
+private slots:
+    void scopeTest();
+    void unlockAndRelockTest();
+    void lockerStateTest();
+    void moveSemantics();
+};
+
+void tst_QMutexLocker::scopeTest()
+{
+    class ScopeTestThread : public tst_QMutexLockerThread
+    {
+    public:
+        void run() override
+        {
+            waitForTest();
+
+            {
+                QMutexLocker locker(&mutex);
+                QVERIFY(locker.isLocked());
+                waitForTest();
+            }
+
+            waitForTest();
+        }
+    };
+
+    thread = new ScopeTestThread;
+    thread->start();
+
+    waitForThread();
+    // mutex should be unlocked before entering the scope that creates the QMutexLocker
+    QVERIFY(thread->mutex.tryLock());
+    thread->mutex.unlock();
+    releaseThread();
+
+    waitForThread();
+    // mutex should be locked by the QMutexLocker
+    QVERIFY(!thread->mutex.tryLock());
+    releaseThread();
+
+    waitForThread();
+    // mutex should be unlocked when the QMutexLocker goes out of scope
+    QVERIFY(thread->mutex.tryLock());
+    thread->mutex.unlock();
+    releaseThread();
+
+    QVERIFY(thread->wait());
+
+    delete thread;
+    thread = nullptr;
+}
+
+
+void tst_QMutexLocker::unlockAndRelockTest()
+{
+    class UnlockAndRelockThread : public tst_QMutexLockerThread
+    {
+    public:
+        void run() override
+        {
+            QMutexLocker locker(&mutex);
+            QVERIFY(locker.isLocked());
+
+            waitForTest();
+
+            QVERIFY(locker.isLocked());
+            locker.unlock();
+            QVERIFY(!locker.isLocked());
+
+            waitForTest();
+
+            QVERIFY(!locker.isLocked());
+            locker.relock();
+            QVERIFY(locker.isLocked());
+
+            waitForTest();
+
+            QVERIFY(locker.isLocked());
+        }
+    };
+
+    thread = new UnlockAndRelockThread;
+    thread->start();
+
+    waitForThread();
+    // mutex should be locked by the QMutexLocker
+    QVERIFY(!thread->mutex.tryLock());
+    releaseThread();
+
+    waitForThread();
+    // mutex has been explicitly unlocked via QMutexLocker
+    QVERIFY(thread->mutex.tryLock());
+    thread->mutex.unlock();
+    releaseThread();
+
+    waitForThread();
+    // mutex has been explicitly relocked via QMutexLocker
+    QVERIFY(!thread->mutex.tryLock());
+    releaseThread();
+
+    QVERIFY(thread->wait());
+
+    delete thread;
+    thread = nullptr;
+}
+
+void tst_QMutexLocker::lockerStateTest()
+{
+    class LockerStateThread : public tst_QMutexLockerThread
+    {
+    public:
+        void run() override
+        {
+            {
+                QMutexLocker locker(&mutex);
+                QVERIFY(locker.isLocked());
+
+                locker.unlock();
+                QVERIFY(!locker.isLocked());
+
+                waitForTest();
+                QVERIFY(!locker.isLocked());
+            }
+
+            waitForTest();
+        }
+    };
+
+    thread = new LockerStateThread;
+    thread->start();
+
+    waitForThread();
+    // even though we relock() after creating the QMutexLocker, it shouldn't lock the mutex more than once
+    QVERIFY(thread->mutex.tryLock());
+    thread->mutex.unlock();
+    releaseThread();
+
+    waitForThread();
+    // if we call QMutexLocker::unlock(), its destructor should do nothing
+    QVERIFY(thread->mutex.tryLock());
+    thread->mutex.unlock();
+    releaseThread();
+
+    QVERIFY(thread->wait());
+
+    delete thread;
+    thread = nullptr;
+}
+
+void tst_QMutexLocker::moveSemantics()
+{
+    {
+        QMutexLocker<QMutex> locker(nullptr);
+        QVERIFY(!locker.isLocked());
+        QCOMPARE(locker.mutex(), nullptr);
+
+        QMutexLocker locker2(std::move(locker));
+        QVERIFY(!locker.isLocked());
+        QVERIFY(!locker2.isLocked());
+        QCOMPARE(locker.mutex(), nullptr);
+        QCOMPARE(locker2.mutex(), nullptr);
+    }
+
+    QMutex mutex;
+
+    {
+        QMutexLocker locker(&mutex);
+        QVERIFY(locker.isLocked());
+        QCOMPARE(locker.mutex(), &mutex);
+        QVERIFY(!mutex.tryLock());
+
+        QMutexLocker locker2(std::move(locker));
+        QVERIFY(!locker.isLocked());
+        QVERIFY(locker2.isLocked());
+        QCOMPARE(locker.mutex(), nullptr);
+        QCOMPARE(locker2.mutex(), &mutex);
+        QVERIFY(!mutex.tryLock());
+    }
+
+    QVERIFY(mutex.tryLock());
+    mutex.unlock();
+
+    {
+        QMutex mutex;
+        QMutexLocker locker(&mutex);
+        QVERIFY(locker.isLocked());
+        QCOMPARE(locker.mutex(), &mutex);
+        QVERIFY(!mutex.tryLock());
+
+        locker.unlock();
+        QVERIFY(!locker.isLocked());
+        QCOMPARE(locker.mutex(), &mutex);
+        QVERIFY(mutex.tryLock());
+        mutex.unlock();
+
+        QMutexLocker locker2(std::move(locker));
+        QVERIFY(!locker.isLocked());
+        QVERIFY(!locker2.isLocked());
+        QCOMPARE(locker.mutex(), nullptr);
+        QCOMPARE(locker2.mutex(), &mutex);
+        QVERIFY(mutex.tryLock());
+        mutex.unlock();
+
+        locker2.relock();
+        QVERIFY(!locker.isLocked());
+        QVERIFY(locker2.isLocked());
+        QCOMPARE(locker.mutex(), nullptr);
+        QCOMPARE(locker2.mutex(), &mutex);
+        QVERIFY(!mutex.tryLock());
+    }
+
+    QVERIFY(mutex.tryLock());
+    mutex.unlock();
+}
+
+QTEST_MAIN(tst_QMutexLocker)
+#include "tst_qmutexlocker.moc"