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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

3 files changed, 542 insertions, 0 deletions

diff --git a/tests/auto/qtconcurrentthreadengine/.gitignore b/tests/auto/qtconcurrentthreadengine/.gitignore
new file mode 100644
index 0000000000..a2e2896246
--- /dev/null
+++ b/tests/auto/qtconcurrentthreadengine/.gitignore
@@ -0,0 +1 @@
+tst_qtconcurrentthreadengine
diff --git a/tests/auto/qtconcurrentthreadengine/qtconcurrentthreadengine.pro b/tests/auto/qtconcurrentthreadengine/qtconcurrentthreadengine.pro
new file mode 100644
index 0000000000..bbfcf5ebe3
--- /dev/null
+++ b/tests/auto/qtconcurrentthreadengine/qtconcurrentthreadengine.pro
@@ -0,0 +1,5 @@
+load(qttest_p4)
+SOURCES += tst_qtconcurrentthreadengine.cpp
+QT = core
+CONFIG += parallel_test
+CONFIG += parallel_test
diff --git a/tests/auto/qtconcurrentthreadengine/tst_qtconcurrentthreadengine.cpp b/tests/auto/qtconcurrentthreadengine/tst_qtconcurrentthreadengine.cpp
new file mode 100644
index 0000000000..aa308e0c30
--- /dev/null
+++ b/tests/auto/qtconcurrentthreadengine/tst_qtconcurrentthreadengine.cpp
@@ -0,0 +1,536 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <qtconcurrentthreadengine.h>
+#include <qtconcurrentexception.h>
+#include <QThread>
+#include <QtTest/QtTest>
+#include "../qfuture/versioncheck.h"
+
+#ifndef QT_NO_CONCURRENT_TEST
+
+using namespace QtConcurrent;
+
+class tst_QtConcurrentThreadEngine: public QObject
+{
+    Q_OBJECT
+public:
+    void threadCount();
+private slots:
+    void runDirectly();
+    void result();
+    void runThroughStarter();
+    void cancel();
+    void throttle();
+    void multipleResults();
+    void stresstest();
+    void cancelQueuedSlowUser();
+#ifndef QT_NO_EXCEPTIONS
+    void exceptions();
+#endif
+};
+
+
+class PrintUser : public ThreadEngine<void>
+{
+public:
+    ThreadFunctionResult threadFunction()
+    {
+        QTest::qSleep(50);
+        QTest::qSleep(100);
+        return ThreadFinished;
+    }
+};
+
+void tst_QtConcurrentThreadEngine::runDirectly()
+{
+    {
+        PrintUser engine;
+        engine.startSingleThreaded();
+        engine.startBlocking();
+    }
+    {
+        PrintUser *engine = new PrintUser();
+        QFuture<void> f = engine->startAsynchronously();
+        f.waitForFinished();
+    }
+}
+
+class StringResultUser : public ThreadEngine<QString>
+{
+public:
+    typedef QString ResultType;
+    StringResultUser()
+    : done(false) { }
+
+    bool shouldStartThread()
+    {
+        return !done;
+    }
+
+    ThreadFunctionResult threadFunction()
+    {
+        done = true;
+        return ThreadFinished;
+    }
+
+    QString *result()
+    {
+        foo = "Foo";
+        return &foo;
+    }
+    QString foo;
+    bool done;
+};
+
+void tst_QtConcurrentThreadEngine::result()
+{
+    StringResultUser engine;
+    QCOMPARE(*engine.startBlocking(), QString("Foo"));
+}
+
+class VoidResultUser : public ThreadEngine<void>
+{
+public:
+    bool shouldStartThread()
+    {
+        return !done;
+    }
+
+    ThreadFunctionResult threadFunction()
+    {
+        done = true;
+        return ThreadFinished;
+    }
+
+    void *result()
+    {
+        return 0;
+    }
+    bool done;
+};
+
+void tst_QtConcurrentThreadEngine::runThroughStarter()
+{
+    {
+        ThreadEngineStarter<QString> starter = startThreadEngine(new StringResultUser());
+        QFuture<QString>  f = starter.startAsynchronously();
+        QCOMPARE(f.result(), QString("Foo"));
+    }
+
+    {
+        ThreadEngineStarter<QString> starter = startThreadEngine(new StringResultUser());
+        QString str = starter.startBlocking();
+        QCOMPARE(str, QString("Foo"));
+    }
+}
+
+class CancelUser : public ThreadEngine<void>
+{
+public:
+    void *result()
+    {
+        return 0;
+    }
+
+    ThreadFunctionResult threadFunction()
+    {
+        while (this->isCanceled() == false)
+        {
+            QTest::qSleep(10);
+        }
+        return ThreadFinished;
+    }
+};
+
+void tst_QtConcurrentThreadEngine::cancel()
+{
+    {
+        CancelUser *engine = new CancelUser();
+        QFuture<void> f = engine->startAsynchronously();
+        f.cancel();
+        f.waitForFinished();
+    }
+    {
+        CancelUser *engine = new CancelUser();
+        QFuture<void> f = engine->startAsynchronously();
+        QTest::qSleep(10);
+        f.cancel();
+        f.waitForFinished();
+    }
+}
+
+QAtomicInt count;
+class ThrottleAlwaysUser : public ThreadEngine<void>
+{
+public:
+    ThrottleAlwaysUser()
+    {
+        count = initialCount = 100;
+        finishing = false;
+    }
+
+    bool shouldStartThread()
+    {
+        return !finishing;
+    }
+
+    ThreadFunctionResult threadFunction()
+    {
+        forever {
+            const int local = count;
+            if (local == 0) {
+                finishing = true;
+                return ThreadFinished;
+            }
+
+            if (count.testAndSetOrdered(local, local - 1))
+                break;
+        }
+        return ThrottleThread;
+    }
+
+    bool finishing;
+    int initialCount;
+};
+
+// Test that a user task with a thread function that always
+// want to be throttled still completes. The thread engine
+// should make keep one thread running at all times.
+void tst_QtConcurrentThreadEngine::throttle()
+{
+    const int repeats = 10;
+    for (int i = 0; i < repeats; ++i) {
+        QFuture<void> f = (new ThrottleAlwaysUser())->startAsynchronously();
+        f.waitForFinished();
+        QCOMPARE(int(count), 0);
+    }
+
+    for (int i = 0; i < repeats; ++i) {
+        ThrottleAlwaysUser t;
+        t.startBlocking();
+        QCOMPARE(int(count), 0);
+    }
+}
+
+QSet<QThread *> threads;
+QMutex mutex;
+class ThreadCountUser : public ThreadEngine<void>
+{
+public:
+    ThreadCountUser(bool finishImmediately = false)
+    {
+        threads.clear();
+        finishing = finishImmediately;
+    }
+
+    bool shouldStartThread()
+    {
+        return !finishing;
+    }
+
+    ThreadFunctionResult threadFunction()
+    {
+        {
+            QMutexLocker lock(&mutex);
+            threads.insert(QThread::currentThread());
+        }
+        QTest::qSleep(10);
+        finishing = true;
+        return ThreadFinished;
+    }
+
+    bool finishing;
+};
+
+void tst_QtConcurrentThreadEngine::threadCount()
+{
+    const int repeats = 10;
+    for (int i = 0; i < repeats; ++i) {
+        ThreadCountUser t;
+        t.startBlocking();
+        QCOMPARE(threads.count(), QThreadPool::globalInstance()->maxThreadCount() + 1); // +1 for the main thread.
+
+        (new ThreadCountUser())->startAsynchronously().waitForFinished();
+        QCOMPARE(threads.count(), QThreadPool::globalInstance()->maxThreadCount());
+    }
+
+    // Set the finish flag immediately, this should give us one thread only.
+    for (int i = 0; i < repeats; ++i) {
+        ThreadCountUser t(true /*finishImmediately*/);
+        t.startBlocking();
+        QCOMPARE(threads.count(), 1);
+
+        (new ThreadCountUser(true /*finishImmediately*/))->startAsynchronously().waitForFinished();
+        QCOMPARE(threads.count(), 1);
+    }
+}
+
+class MultipleResultsUser : public ThreadEngine<int>
+{
+public:
+    bool shouldStartThread()
+    {
+        return false;
+    }
+
+    ThreadFunctionResult threadFunction()
+    {
+        for (int i = 0; i < 10; ++i)
+            this->reportResult(&i);
+        return ThreadFinished;
+    }
+};
+
+
+void tst_QtConcurrentThreadEngine::multipleResults()
+{
+    MultipleResultsUser *engine =  new MultipleResultsUser();
+    QFuture<int> f = engine->startAsynchronously();
+    QCOMPARE(f.results().count() , 10);
+    QCOMPARE(f.resultAt(0), 0);
+    QCOMPARE(f.resultAt(5), 5);
+    QCOMPARE(f.resultAt(9), 9);
+    f.waitForFinished();
+}
+
+
+class NoThreadsUser : public ThreadEngine<void>
+{
+public:
+    bool shouldStartThread()
+    {
+        return false;
+    }
+
+    ThreadFunctionResult threadFunction()
+    {
+        return ThreadFinished;
+    }
+
+    void *result()
+    {
+        return 0;
+    }
+};
+
+void tst_QtConcurrentThreadEngine::stresstest()
+{
+    const int times = 20000;
+
+    for (int i = 0; i < times; ++i) {
+        VoidResultUser *engine = new VoidResultUser();
+        engine->startAsynchronously().waitForFinished();
+    }
+
+    for (int i = 0; i < times; ++i) {
+        VoidResultUser *engine = new VoidResultUser();
+        engine->startAsynchronously();
+    }
+
+    for (int i = 0; i < times; ++i) {
+        VoidResultUser *engine = new VoidResultUser();
+        engine->startAsynchronously().waitForFinished();
+    }
+}
+
+const int sleepTime = 20;
+class SlowUser : public ThreadEngine<void>
+{
+public:
+    bool shouldStartThread() { return false; }
+    ThreadFunctionResult threadFunction() { QTest::qSleep(sleepTime); return ThreadFinished; }
+};
+
+void tst_QtConcurrentThreadEngine::cancelQueuedSlowUser()
+{
+    const int times = 100;
+
+    QTime t;
+    t.start();
+
+    {
+        QList<QFuture<void> > futures;
+        for (int i = 0; i < times; ++i) {
+            SlowUser *engine = new SlowUser();
+            futures.append(engine->startAsynchronously());
+        }
+
+        foreach(QFuture<void> future, futures)
+            future.cancel();
+    }
+
+    QVERIFY(t.elapsed() < (sleepTime * times) / 2);
+}
+
+#ifndef QT_NO_EXCEPTIONS
+
+class QtConcurrentExceptionThrower : public ThreadEngine<void>
+{
+public:
+    QtConcurrentExceptionThrower(QThread *blockThread = 0)
+    {
+        this->blockThread = blockThread;
+    }
+
+    ThreadFunctionResult threadFunction()
+    {
+        QTest::qSleep(50);
+        throw QtConcurrent::Exception();
+        return ThreadFinished;
+    }
+    QThread *blockThread;
+};
+
+class UnrelatedExceptionThrower : public ThreadEngine<void>
+{
+public:
+    UnrelatedExceptionThrower(QThread *blockThread = 0)
+    {
+        this->blockThread = blockThread;
+    }
+
+    ThreadFunctionResult threadFunction()
+    {
+        QTest::qSleep(50);
+        throw int();
+        return ThreadFinished;
+    }
+    QThread *blockThread;
+};
+
+void tst_QtConcurrentThreadEngine::exceptions()
+{
+    // Asynchronous mode:
+    {
+        bool caught = false;
+        try  {
+            QtConcurrentExceptionThrower *e = new QtConcurrentExceptionThrower();
+            QFuture<void> f = e->startAsynchronously();
+            f.waitForFinished();
+        } catch (Exception &e) {
+            caught = true;
+        }
+        if (!caught)
+            QFAIL("did not get exception");
+    }
+
+    // Blocking mode:
+    // test throwing the exception from a worker thread.
+    {
+        bool caught = false;
+        try  {
+            QtConcurrentExceptionThrower e(QThread::currentThread());
+            e.startBlocking();
+        } catch (Exception &e) {
+            caught = true;
+        }
+
+        if (!caught)
+            QFAIL("did not get exception");
+    }
+
+    // test throwing the exception from the main thread (different code path)
+    {
+        bool caught = false;
+        try  {
+            QtConcurrentExceptionThrower e(0);
+            e.startBlocking();
+        } catch (Exception &e) {
+            caught = true;
+        }
+
+        if (!caught)
+            QFAIL("did not get exception");
+    }
+
+    // Asynchronous mode:
+    {
+        bool caught = false;
+        try  {
+            UnrelatedExceptionThrower *e = new UnrelatedExceptionThrower();
+            QFuture<void> f = e->startAsynchronously();
+            f.waitForFinished();
+        } catch (QtConcurrent::UnhandledException &e) {
+            caught = true;
+        }
+        if (!caught)
+            QFAIL("did not get exception");
+    }
+
+    // Blocking mode:
+    // test throwing the exception from a worker thread.
+    {
+        bool caught = false;
+        try  {
+            UnrelatedExceptionThrower e(QThread::currentThread());
+            e.startBlocking();
+        } catch (QtConcurrent::UnhandledException &e) {
+            caught = true;
+        }
+
+        if (!caught)
+            QFAIL("did not get exception");
+    }
+
+    // test throwing the exception from the main thread (different code path)
+    {
+        bool caught = false;
+        try  {
+            UnrelatedExceptionThrower e(0);
+            e.startBlocking();
+        } catch (QtConcurrent::UnhandledException &e) {
+            caught = true;
+        }
+
+        if (!caught)
+            QFAIL("did not get exception");
+    }
+}
+
+#endif
+
+QTEST_MAIN(tst_QtConcurrentThreadEngine)
+
+#include "tst_qtconcurrentthreadengine.moc"
+
+#else
+QTEST_NOOP_MAIN
+#endif