Move QtConcurrent into its own module

Task-number: QTBUG-20892

Change-Id: I614500aafb6428915509983608bbb0ade4e4f016
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

3 files changed, 468 insertions, 0 deletions

diff --git a/tests/auto/concurrent/qtconcurrentrun/.gitignore b/tests/auto/concurrent/qtconcurrentrun/.gitignore
new file mode 100644
index 0000000000..d7a8334ec4
--- /dev/null
+++ b/tests/auto/concurrent/qtconcurrentrun/.gitignore
@@ -0,0 +1 @@
+tst_qtconcurrentrun
diff --git a/tests/auto/concurrent/qtconcurrentrun/qtconcurrentrun.pro b/tests/auto/concurrent/qtconcurrentrun/qtconcurrentrun.pro
new file mode 100644
index 0000000000..03d77b33a2
--- /dev/null
+++ b/tests/auto/concurrent/qtconcurrentrun/qtconcurrentrun.pro
@@ -0,0 +1,4 @@
+CONFIG += testcase parallel_test
+TARGET = tst_qtconcurrentrun
+QT = core testlib concurrent
+SOURCES = tst_qtconcurrentrun.cpp
diff --git a/tests/auto/concurrent/qtconcurrentrun/tst_qtconcurrentrun.cpp b/tests/auto/concurrent/qtconcurrentrun/tst_qtconcurrentrun.cpp
new file mode 100644
index 0000000000..86e3433c12
--- /dev/null
+++ b/tests/auto/concurrent/qtconcurrentrun/tst_qtconcurrentrun.cpp
@@ -0,0 +1,463 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <qtconcurrentrun.h>
+#include <qfuture.h>
+#include <QString>
+#include <QtTest/QtTest>
+
+using namespace QtConcurrent;
+
+class tst_QtConcurrentRun: public QObject
+{
+    Q_OBJECT
+private slots:
+    void runLightFunction();
+    void runHeavyFunction();
+    void returnValue();
+    void functionObject();
+    void memberFunctions();
+    void implicitConvertibleTypes();
+    void runWaitLoop();
+    void recursive();
+#ifndef QT_NO_EXCEPTIONS
+    void exceptions();
+#endif
+    void functor();
+    void lambda();
+};
+
+void light()
+{
+    qDebug("in function");
+    qDebug("done function");
+}
+
+void heavy()
+{
+    qDebug("in function");
+    QString str;
+    for (int i = 0; i < 1000000; ++i)
+        str.append("a");
+    qDebug("done function");
+}
+
+
+void tst_QtConcurrentRun::runLightFunction()
+{
+    qDebug("starting function");
+    QFuture<void> future = run(light);
+    qDebug("waiting");
+    future.waitForFinished();
+    qDebug("done");
+}
+
+void tst_QtConcurrentRun::runHeavyFunction()
+{
+    qDebug("starting function");
+    QFuture<void> future = run(heavy);
+    qDebug("waiting");
+    future.waitForFinished();
+    qDebug("done");
+}
+
+int returnInt0()
+{
+    return 10;
+}
+
+int returnInt1(int i)
+{
+    return i;
+}
+
+class A
+{
+public:
+    int member0() { return 10; }
+    int member1(int in) { return in; }
+
+    typedef int result_type;
+    int operator()() { return 10; }
+    int operator()(int in) { return in; }
+};
+
+class AConst
+{
+public:
+    int member0() const { return 10; }
+    int member1(int in) const { return in; }
+
+    typedef int result_type;
+    int operator()() const { return 10; }
+    int operator()(int in) const { return in; }
+};
+
+void tst_QtConcurrentRun::returnValue()
+{
+    QFuture<int> f;
+    
+    f = run(returnInt0);
+    QCOMPARE(f.result(), 10);
+    
+    A a;
+    f = run(&a, &A::member0);
+    QCOMPARE(f.result(), 10);
+
+    f = run(&a, &A::member1, 20);
+    QCOMPARE(f.result(), 20);
+
+    f = run(a, &A::member0);
+    QCOMPARE(f.result(), 10);
+
+    f = run(a, &A::member1, 20);
+    QCOMPARE(f.result(), 20);
+
+    f = run(a);
+    QCOMPARE(f.result(), 10);
+
+    f = run(&a);
+    QCOMPARE(f.result(), 10);
+
+    f = run(a, 20);
+    QCOMPARE(f.result(), 20);
+
+    f = run(&a, 20);
+    QCOMPARE(f.result(), 20);
+
+    const AConst aConst = AConst();
+    f = run(&aConst, &AConst::member0);
+    QCOMPARE(f.result(), 10);
+
+    f = run(&aConst, &AConst::member1, 20);
+    QCOMPARE(f.result(), 20);
+
+    f = run(aConst, &AConst::member0);
+    QCOMPARE(f.result(), 10);
+
+    f = run(aConst, &AConst::member1, 20);
+    QCOMPARE(f.result(), 20);
+
+    f = run(aConst);
+    QCOMPARE(f.result(), 10);
+
+    f = run(&aConst);
+    QCOMPARE(f.result(), 10);
+
+    f = run(aConst, 20);
+    QCOMPARE(f.result(), 20);
+
+    f = run(&aConst, 20);
+    QCOMPARE(f.result(), 20);
+}
+
+struct TestClass
+{
+    void foo() { }
+    typedef void result_type;
+    void operator()() { }
+    void operator()(int) { }
+    void fooInt(int){ };
+};
+
+struct TestConstClass
+{
+    void foo() const { }
+    typedef void result_type;
+    void operator()() const { }
+    void operator()(int) const { }
+    void fooInt(int) const { };
+};
+
+void tst_QtConcurrentRun::functionObject()
+{
+    QFuture<void> f;
+    TestClass c;
+    
+    f = run(c);
+    f = run(&c);
+    f = run(c, 10);
+    f = run(&c, 10);
+
+    const TestConstClass cc = TestConstClass();
+    f = run(cc);
+    f = run(&cc);
+    f = run(cc, 10);
+    f = run(&cc, 10);
+}
+
+
+void tst_QtConcurrentRun::memberFunctions()
+{
+    TestClass c;
+
+    run(c, &TestClass::foo).waitForFinished();
+    run(&c, &TestClass::foo).waitForFinished();
+    run(c, &TestClass::fooInt, 10).waitForFinished();
+    run(&c, &TestClass::fooInt, 10).waitForFinished();
+
+    const TestConstClass cc = TestConstClass();
+    run(cc, &TestConstClass::foo).waitForFinished();
+    run(&cc, &TestConstClass::foo).waitForFinished();
+    run(cc, &TestConstClass::fooInt, 10).waitForFinished();
+    run(&cc, &TestConstClass::fooInt, 10).waitForFinished();
+}
+
+
+void doubleFunction(double)
+{
+
+}
+
+void stringConstRefFunction(const QString &)
+{
+
+}
+
+void stringRefFunction(QString &)
+{
+
+}
+
+void stringFunction(QString)
+{
+
+}
+
+void stringIntFunction(QString)
+{
+
+}
+
+
+void tst_QtConcurrentRun::implicitConvertibleTypes()
+{
+    double d;
+    run(doubleFunction, d).waitForFinished();
+    int i;
+    run(doubleFunction, d).waitForFinished();
+    run(doubleFunction, i).waitForFinished();
+    run(doubleFunction, 10).waitForFinished();
+    run(stringFunction, QLatin1String("Foo")).waitForFinished();
+    run(stringConstRefFunction, QLatin1String("Foo")).waitForFinished();
+    QString string;
+    run(stringRefFunction, string).waitForFinished();
+}
+
+void fn() { }
+
+void tst_QtConcurrentRun::runWaitLoop()
+{
+    for (int i = 0; i < 1000; ++i)
+        run(fn).waitForFinished();
+}
+
+QAtomicInt count;
+
+void recursiveRun(int level)
+{
+    count.ref();
+    if (--level > 0) {
+        QFuture<void> f1 = run(recursiveRun, level);
+        QFuture<void> f2 = run(recursiveRun, level);
+        f1.waitForFinished();
+        f2.waitForFinished();
+    }
+}
+
+int recursiveResult(int level)
+{
+    count.ref();
+    if (--level > 0) {
+        QFuture<int> f1 = run(recursiveResult, level);
+        QFuture<int> f2 = run(recursiveResult, level);
+        return f1.result() + f2.result();
+    }
+    return 1;
+}
+
+void tst_QtConcurrentRun::recursive()
+{
+    int levels = 15;
+
+    for (int i = 0; i < QThread::idealThreadCount(); ++i) {
+        count.store(0);
+        QThreadPool::globalInstance()->setMaxThreadCount(i);
+        recursiveRun(levels);
+        QCOMPARE(count.load(), (int)pow(2.0, levels) - 1);
+    }
+
+    for (int i = 0; i < QThread::idealThreadCount(); ++i) {
+        count.store(0);
+        QThreadPool::globalInstance()->setMaxThreadCount(i);
+        recursiveResult(levels);
+        QCOMPARE(count.load(), (int)pow(2.0, levels) - 1);
+    }
+}
+
+int e;
+void vfn0()
+{
+    ++e;
+}
+
+int fn0()
+{
+    return 1;
+}
+
+void vfn1(double)
+{
+    ++e;
+}
+
+int fn1(int)
+{
+    return 1;
+}
+
+void vfn2(double, int *)
+{
+    ++e;
+}
+
+int fn2(double, int *)
+{
+    return 1;
+}
+
+
+#ifndef QT_NO_EXCEPTIONS
+void throwFunction()
+{
+    throw QtConcurrent::Exception();
+}
+
+int throwFunctionReturn()
+{
+    throw QtConcurrent::Exception();
+    return 0;
+}
+
+void tst_QtConcurrentRun::exceptions()
+{
+    bool caught = false;
+    try  {
+        QtConcurrent::run(throwFunction).waitForFinished();
+    } catch (Exception &e) {
+        caught = true;
+    }
+    if (!caught)
+        QFAIL("did not get exception");
+
+    caught = false;
+    try  {
+        QtConcurrent::run(throwFunctionReturn).waitForFinished();
+    } catch (Exception &e) {
+        caught = true;
+    }
+    if (!caught)
+        QFAIL("did not get exception");
+}
+#endif
+
+struct Functor {
+    int operator()() { return 42; }
+    double operator()(double a, double b) { return a/b; }
+    int operator()(int a, int b) { return a/b; }
+    void operator()(int) { }
+    void operator()(int, int, int) { }
+    void operator()(int, int, int, int) { }
+    void operator()(int, int, int, int, int) { }
+    void operator()(int, int, int, int, int, int) { }
+};
+
+// This tests functor without result_type; decltype need to be supported by the compiler.
+void tst_QtConcurrentRun::functor()
+{
+#ifndef Q_COMPILER_DECLTYPE
+    QSKIP("Compiler does not support decltype");
+#else
+    Functor f;
+    {
+        QFuture<int> fut = QtConcurrent::run(f);
+        QCOMPARE(fut.result(), 42);
+    }
+    {
+        QFuture<double> fut = QtConcurrent::run(f, 8.5, 1.8);
+        QCOMPARE(fut.result(), (8.5/1.8));
+    }
+    {
+        QFuture<int> fut = QtConcurrent::run(f, 19, 3);
+        QCOMPARE(fut.result(), int(19/3));
+    }
+    {
+        QtConcurrent::run(f, 1).waitForFinished();
+        QtConcurrent::run(f, 1,2).waitForFinished();
+        QtConcurrent::run(f, 1,2,3).waitForFinished();
+        QtConcurrent::run(f, 1,2,3,4).waitForFinished();
+        QtConcurrent::run(f, 1,2,3,4,5).waitForFinished();
+    }
+#endif
+}
+
+void tst_QtConcurrentRun::lambda()
+{
+#ifndef Q_COMPILER_LAMBDA
+    QSKIP("Compiler does not support lambda");
+#else
+    QCOMPARE(QtConcurrent::run([](){ return 45; }).result(), 45);
+    QCOMPARE(QtConcurrent::run([](int a){ return a+15; }, 12).result(), 12+15);
+    QCOMPARE(QtConcurrent::run([](int a, double b){ return a + b; }, 12, 15).result(), double(12+15));
+    QCOMPARE(QtConcurrent::run([](int a , int, int, int, int b){ return a + b; }, 1, 2, 3, 4, 5).result(), 1 + 5);
+
+#ifdef Q_COMPILER_INITIALIZER_LISTS
+    {
+        QString str { "Hello World Foo" };
+        QFuture<QStringList> f1 = QtConcurrent::run([&](){ return str.split(' '); });
+        auto r = f1.result();
+        QCOMPARE(r, QStringList({"Hello", "World", "Foo"}));
+    }
+#endif
+#endif
+}
+
+QTEST_MAIN(tst_QtConcurrentRun)
+#include "tst_qtconcurrentrun.moc"