qt 6.5.1 original

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

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

tests/auto/corelib/thread/qreadlocker/tst_qreadlocker.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 <QReadLocker>
+#include <QSemaphore>
+#include <QThread>
+
+class tst_QReadLockerThread : public QThread
+{
+public:
+    QReadWriteLock lock;
+    QSemaphore semaphore, testSemaphore;
+
+    void waitForTest()
+    {
+        semaphore.release();
+        testSemaphore.acquire();
+    }
+};
+
+class tst_QReadLocker : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QReadLockerThread *thread;
+
+    void waitForThread()
+    {
+        thread->semaphore.acquire();
+    }
+    void releaseThread()
+    {
+        thread->testSemaphore.release();
+    }
+
+private slots:
+    void scopeTest();
+    void unlockAndRelockTest();
+    void lockerStateTest();
+};
+
+void tst_QReadLocker::scopeTest()
+{
+    class ScopeTestThread : public tst_QReadLockerThread
+    {
+    public:
+        void run() override
+        {
+            waitForTest();
+
+            {
+                QReadLocker locker(&lock);
+                waitForTest();
+            }
+
+            waitForTest();
+        }
+    };
+
+    thread = new ScopeTestThread;
+    thread->start();
+
+    waitForThread();
+    // lock should be unlocked before entering the scope that creates the QReadLocker
+    QVERIFY(thread->lock.tryLockForWrite());
+    thread->lock.unlock();
+    releaseThread();
+
+    waitForThread();
+    // lock should be locked by the QReadLocker
+    QVERIFY(!thread->lock.tryLockForWrite());
+    releaseThread();
+
+    waitForThread();
+    // lock should be unlocked when the QReadLocker goes out of scope
+    QVERIFY(thread->lock.tryLockForWrite());
+    thread->lock.unlock();
+    releaseThread();
+
+    QVERIFY(thread->wait());
+
+    delete thread;
+    thread = nullptr;
+}
+
+
+void tst_QReadLocker::unlockAndRelockTest()
+{
+    class UnlockAndRelockThread : public tst_QReadLockerThread
+    {
+    public:
+        void run() override
+        {
+            QReadLocker locker(&lock);
+
+            waitForTest();
+
+            locker.unlock();
+
+            waitForTest();
+
+            locker.relock();
+
+            waitForTest();
+        }
+    };
+
+    thread = new UnlockAndRelockThread;
+    thread->start();
+
+    waitForThread();
+    // lock should be locked by the QReadLocker
+    QVERIFY(!thread->lock.tryLockForWrite());
+    releaseThread();
+
+    waitForThread();
+    // lock has been explicitly unlocked via QReadLocker
+    QVERIFY(thread->lock.tryLockForWrite());
+    thread->lock.unlock();
+    releaseThread();
+
+    waitForThread();
+    // lock has been explicitly relocked via QReadLocker
+    QVERIFY(!thread->lock.tryLockForWrite());
+    releaseThread();
+
+    QVERIFY(thread->wait());
+
+    delete thread;
+    thread = nullptr;
+}
+
+void tst_QReadLocker::lockerStateTest()
+{
+    class LockerStateThread : public tst_QReadLockerThread
+    {
+    public:
+        void run() override
+        {
+            {
+                QReadLocker locker(&lock);
+                locker.relock();
+                locker.unlock();
+
+                waitForTest();
+            }
+
+            waitForTest();
+        }
+    };
+
+    thread = new LockerStateThread;
+    thread->start();
+
+    waitForThread();
+    // even though we relock() after creating the QReadLocker, it shouldn't lock the lock more than once
+    QVERIFY(thread->lock.tryLockForWrite());
+    thread->lock.unlock();
+    releaseThread();
+
+    waitForThread();
+    // if we call QReadLocker::unlock(), its destructor should do nothing
+    QVERIFY(thread->lock.tryLockForWrite());
+    thread->lock.unlock();
+    releaseThread();
+
+    QVERIFY(thread->wait());
+
+    delete thread;
+    thread = nullptr;
+}
+
+QTEST_MAIN(tst_QReadLocker)
+#include "tst_qreadlocker.moc"