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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
#include <utils/algorithm.h>
#include <utils/async.h>
#include <QTest>
using namespace Utils;
using namespace std::chrono_literals;
class tst_Async : public QObject
{
Q_OBJECT
private slots:
void runAsync();
void crefFunction();
void onResultReady();
void futureSynchonizer();
void taskTree();
void mapReduce_data();
void mapReduce();
private:
QThreadPool m_threadPool;
};
void report3(QPromise<int> &promise)
{
promise.addResult(0);
promise.addResult(2);
promise.addResult(1);
}
static void staticReport3(QPromise<int> &promise)
{
promise.addResult(0);
promise.addResult(2);
promise.addResult(1);
}
void reportN(QPromise<double> &promise, int n)
{
for (int i = 0; i < n; ++i)
promise.addResult(0);
}
static void staticReportN(QPromise<double> &promise, int n)
{
for (int i = 0; i < n; ++i)
promise.addResult(0);
}
void reportString1(QPromise<QString> &promise, const QString &s)
{
promise.addResult(s);
}
void reportString2(QPromise<QString> &promise, QString s)
{
promise.addResult(s);
}
class Functor {
public:
void operator()(QPromise<double> &promise, int n) const
{
for (int i = 0; i < n; ++i)
promise.addResult(0);
}
};
class MyObject {
public:
static void staticMember0(QPromise<double> &promise)
{
promise.addResult(0);
promise.addResult(2);
promise.addResult(1);
}
static void staticMember1(QPromise<double> &promise, int n)
{
for (int i = 0; i < n; ++i)
promise.addResult(0);
}
void member0(QPromise<double> &promise) const
{
promise.addResult(0);
promise.addResult(2);
promise.addResult(1);
}
void member1(QPromise<double> &promise, int n) const
{
for (int i = 0; i < n; ++i)
promise.addResult(0);
}
void memberString1(QPromise<QString> &promise, const QString &s) const
{
promise.addResult(s);
}
void memberString2(QPromise<QString> &promise, QString s) const
{
promise.addResult(s);
}
void nonConstMember(QPromise<double> &promise)
{
promise.addResult(0);
promise.addResult(2);
promise.addResult(1);
}
};
template <typename...>
struct FutureArgType;
template <typename Arg>
struct FutureArgType<QFuture<Arg>>
{
using Type = Arg;
};
template <typename...>
struct ConcurrentResultType;
template<typename Function, typename ...Args>
struct ConcurrentResultType<Function, Args...>
{
using Type = typename FutureArgType<decltype(QtConcurrent::run(
std::declval<Function>(), std::declval<Args>()...))>::Type;
};
template <typename Function, typename ...Args,
typename ResultType = typename ConcurrentResultType<Function, Args...>::Type>
std::shared_ptr<Async<ResultType>> createAsyncTask(Function &&function, Args &&...args)
{
auto asyncTask = std::make_shared<Async<ResultType>>();
asyncTask->setConcurrentCallData(std::forward<Function>(function), std::forward<Args>(args)...);
asyncTask->start();
return asyncTask;
}
void tst_Async::runAsync()
{
// tesing QtConcurrent::run()
QCOMPARE(QtConcurrent::run(&report3).results(),
QList<int>({0, 2, 1}));
QCOMPARE(QtConcurrent::run(report3).results(),
QList<int>({0, 2, 1}));
QCOMPARE(QtConcurrent::run(&staticReport3).results(),
QList<int>({0, 2, 1}));
QCOMPARE(QtConcurrent::run(staticReport3).results(),
QList<int>({0, 2, 1}));
QCOMPARE(QtConcurrent::run(&reportN, 2).results(),
QList<double>({0, 0}));
QCOMPARE(QtConcurrent::run(reportN, 2).results(),
QList<double>({0, 0}));
QCOMPARE(QtConcurrent::run(&staticReportN, 2).results(),
QList<double>({0, 0}));
QCOMPARE(QtConcurrent::run(staticReportN, 2).results(),
QList<double>({0, 0}));
// free function pointer
QCOMPARE(createAsyncTask(&report3)->results(),
QList<int>({0, 2, 1}));
QCOMPARE(Utils::asyncRun(&report3).results(),
QList<int>({0, 2, 1}));
QCOMPARE(createAsyncTask(report3)->results(),
QList<int>({0, 2, 1}));
QCOMPARE(Utils::asyncRun(report3).results(),
QList<int>({0, 2, 1}));
QCOMPARE(createAsyncTask(&staticReport3)->results(),
QList<int>({0, 2, 1}));
QCOMPARE(Utils::asyncRun(&staticReport3).results(),
QList<int>({0, 2, 1}));
QCOMPARE(createAsyncTask(staticReport3)->results(),
QList<int>({0, 2, 1}));
QCOMPARE(Utils::asyncRun(staticReport3).results(),
QList<int>({0, 2, 1}));
QCOMPARE(createAsyncTask(&reportN, 2)->results(),
QList<double>({0, 0}));
QCOMPARE(Utils::asyncRun(&reportN, 2).results(),
QList<double>({0, 0}));
QCOMPARE(createAsyncTask(reportN, 2)->results(),
QList<double>({0, 0}));
QCOMPARE(Utils::asyncRun(reportN, 2).results(),
QList<double>({0, 0}));
QCOMPARE(createAsyncTask(&staticReportN, 2)->results(),
QList<double>({0, 0}));
QCOMPARE(Utils::asyncRun(&staticReportN, 2).results(),
QList<double>({0, 0}));
QCOMPARE(createAsyncTask(staticReportN, 2)->results(),
QList<double>({0, 0}));
QCOMPARE(Utils::asyncRun(staticReportN, 2).results(),
QList<double>({0, 0}));
QString s = QLatin1String("string");
const QString &crs = QLatin1String("cr string");
const QString cs = QLatin1String("c string");
QCOMPARE(createAsyncTask(reportString1, s)->results(),
QStringList({s}));
QCOMPARE(Utils::asyncRun(reportString1, s).results(),
QStringList({s}));
QCOMPARE(createAsyncTask(reportString1, crs)->results(),
QStringList({crs}));
QCOMPARE(Utils::asyncRun(reportString1, crs).results(),
QStringList({crs}));
QCOMPARE(createAsyncTask(reportString1, cs)->results(),
QStringList({cs}));
QCOMPARE(Utils::asyncRun(reportString1, cs).results(),
QStringList({cs}));
QCOMPARE(createAsyncTask(reportString1, QString(QLatin1String("rvalue")))->results(),
QStringList({QString(QLatin1String("rvalue"))}));
QCOMPARE(Utils::asyncRun(reportString1, QString(QLatin1String("rvalue"))).results(),
QStringList({QString(QLatin1String("rvalue"))}));
QCOMPARE(createAsyncTask(reportString2, s)->results(),
QStringList({s}));
QCOMPARE(Utils::asyncRun(reportString2, s).results(),
QStringList({s}));
QCOMPARE(createAsyncTask(reportString2, crs)->results(),
QStringList({crs}));
QCOMPARE(Utils::asyncRun(reportString2, crs).results(),
QStringList({crs}));
QCOMPARE(createAsyncTask(reportString2, cs)->results(),
QStringList({cs}));
QCOMPARE(Utils::asyncRun(reportString2, cs).results(),
QStringList({cs}));
QCOMPARE(createAsyncTask(reportString2, QString(QLatin1String("rvalue")))->results(),
QStringList({QString(QLatin1String("rvalue"))}));
QCOMPARE(Utils::asyncRun(reportString2, QString(QLatin1String("rvalue"))).results(),
QStringList({QString(QLatin1String("rvalue"))}));
// lambda
QCOMPARE(createAsyncTask([](QPromise<double> &promise, int n) {
for (int i = 0; i < n; ++i)
promise.addResult(0);
}, 3)->results(),
QList<double>({0, 0, 0}));
QCOMPARE(Utils::asyncRun([](QPromise<double> &promise, int n) {
for (int i = 0; i < n; ++i)
promise.addResult(0);
}, 3).results(),
QList<double>({0, 0, 0}));
// std::function
const std::function<void(QPromise<double>&,int)> fun = [](QPromise<double> &promise, int n) {
for (int i = 0; i < n; ++i)
promise.addResult(0);
};
QCOMPARE(createAsyncTask(fun, 2)->results(),
QList<double>({0, 0}));
QCOMPARE(Utils::asyncRun(fun, 2).results(),
QList<double>({0, 0}));
// operator()
QCOMPARE(createAsyncTask(Functor(), 3)->results(),
QList<double>({0, 0, 0}));
QCOMPARE(Utils::asyncRun(Functor(), 3).results(),
QList<double>({0, 0, 0}));
const Functor c{};
QCOMPARE(createAsyncTask(c, 2)->results(),
QList<double>({0, 0}));
QCOMPARE(Utils::asyncRun(c, 2).results(),
QList<double>({0, 0}));
// static member functions
QCOMPARE(createAsyncTask(&MyObject::staticMember0)->results(),
QList<double>({0, 2, 1}));
QCOMPARE(Utils::asyncRun(&MyObject::staticMember0).results(),
QList<double>({0, 2, 1}));
QCOMPARE(createAsyncTask(&MyObject::staticMember1, 2)->results(),
QList<double>({0, 0}));
QCOMPARE(Utils::asyncRun(&MyObject::staticMember1, 2).results(),
QList<double>({0, 0}));
// member functions
const MyObject obj{};
QCOMPARE(createAsyncTask(&MyObject::member0, &obj)->results(),
QList<double>({0, 2, 1}));
QCOMPARE(Utils::asyncRun(&MyObject::member0, &obj).results(),
QList<double>({0, 2, 1}));
QCOMPARE(createAsyncTask(&MyObject::member1, &obj, 4)->results(),
QList<double>({0, 0, 0, 0}));
QCOMPARE(Utils::asyncRun(&MyObject::member1, &obj, 4).results(),
QList<double>({0, 0, 0, 0}));
QCOMPARE(createAsyncTask(&MyObject::memberString1, &obj, s)->results(),
QStringList({s}));
QCOMPARE(Utils::asyncRun(&MyObject::memberString1, &obj, s).results(),
QStringList({s}));
QCOMPARE(createAsyncTask(&MyObject::memberString1, &obj, crs)->results(),
QStringList({crs}));
QCOMPARE(Utils::asyncRun(&MyObject::memberString1, &obj, crs).results(),
QStringList({crs}));
QCOMPARE(createAsyncTask(&MyObject::memberString1, &obj, cs)->results(),
QStringList({cs}));
QCOMPARE(Utils::asyncRun(&MyObject::memberString1, &obj, cs).results(),
QStringList({cs}));
QCOMPARE(createAsyncTask(&MyObject::memberString1, &obj, QString(QLatin1String("rvalue")))->results(),
QStringList({QString(QLatin1String("rvalue"))}));
QCOMPARE(Utils::asyncRun(&MyObject::memberString1, &obj, QString(QLatin1String("rvalue"))).results(),
QStringList({QString(QLatin1String("rvalue"))}));
QCOMPARE(createAsyncTask(&MyObject::memberString2, &obj, s)->results(),
QStringList({s}));
QCOMPARE(Utils::asyncRun(&MyObject::memberString2, &obj, s).results(),
QStringList({s}));
QCOMPARE(createAsyncTask(&MyObject::memberString2, &obj, crs)->results(),
QStringList({crs}));
QCOMPARE(Utils::asyncRun(&MyObject::memberString2, &obj, crs).results(),
QStringList({crs}));
QCOMPARE(createAsyncTask(&MyObject::memberString2, &obj, cs)->results(),
QStringList({cs}));
QCOMPARE(Utils::asyncRun(&MyObject::memberString2, &obj, cs).results(),
QStringList({cs}));
QCOMPARE(createAsyncTask(&MyObject::memberString2, &obj, QString(QLatin1String("rvalue")))->results(),
QStringList({QString(QLatin1String("rvalue"))}));
QCOMPARE(Utils::asyncRun(&MyObject::memberString2, &obj, QString(QLatin1String("rvalue"))).results(),
QStringList({QString(QLatin1String("rvalue"))}));
MyObject nonConstObj{};
QCOMPARE(createAsyncTask(&MyObject::nonConstMember, &nonConstObj)->results(),
QList<double>({0, 2, 1}));
QCOMPARE(Utils::asyncRun(&MyObject::nonConstMember, &nonConstObj).results(),
QList<double>({0, 2, 1}));
}
void tst_Async::crefFunction()
{
// free function pointer with promise
auto fun = &report3;
QCOMPARE(createAsyncTask(std::cref(fun))->results(),
QList<int>({0, 2, 1}));
QCOMPARE(Utils::asyncRun(std::cref(fun)).results(),
QList<int>({0, 2, 1}));
// lambda with promise
auto lambda = [](QPromise<double> &promise, int n) {
for (int i = 0; i < n; ++i)
promise.addResult(0);
};
QCOMPARE(createAsyncTask(std::cref(lambda), 3)->results(),
QList<double>({0, 0, 0}));
QCOMPARE(Utils::asyncRun(std::cref(lambda), 3).results(),
QList<double>({0, 0, 0}));
// std::function with promise
const std::function<void(QPromise<double>&,int)> funObj = [](QPromise<double> &promise, int n) {
for (int i = 0; i < n; ++i)
promise.addResult(0);
};
QCOMPARE(createAsyncTask(std::cref(funObj), 2)->results(),
QList<double>({0, 0}));
QCOMPARE(Utils::asyncRun(std::cref(funObj), 2).results(),
QList<double>({0, 0}));
// callable with promise
const Functor c{};
QCOMPARE(createAsyncTask(std::cref(c), 2)->results(),
QList<double>({0, 0}));
QCOMPARE(Utils::asyncRun(std::cref(c), 2).results(),
QList<double>({0, 0}));
// member functions with promise
auto member = &MyObject::member0;
const MyObject obj{};
QCOMPARE(createAsyncTask(std::cref(member), &obj)->results(),
QList<double>({0, 2, 1}));
QCOMPARE(Utils::asyncRun(std::cref(member), &obj).results(),
QList<double>({0, 2, 1}));
}
class ObjWithProperty : public QObject
{
Q_OBJECT
public slots:
void setValue(const QString &s)
{
value = s;
}
public:
QString value;
};
void tst_Async::onResultReady()
{
#if QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)
{ // lambda
QObject context;
QFuture<QString> f = Utils::asyncRun([](QPromise<QString> &fi) {
fi.addResult("Hi");
fi.addResult("there");
});
int count = 0;
QString res;
Utils::onResultReady(f, &context, [&count, &res](const QString &s) {
++count;
res = s;
});
f.waitForFinished();
QCoreApplication::processEvents();
QCOMPARE(count, 2);
QCOMPARE(res, QString("there"));
}
{ // lambda with guard
QFuture<QString> f = Utils::asyncRun([](QPromise<QString> &fi) {
fi.addResult("Hi");
fi.addResult("there");
});
int count = 0;
ObjWithProperty obj;
Utils::onResultReady(f, &obj, [&count, &obj](const QString &s) {
++count;
obj.setValue(s);
});
f.waitForFinished();
QCoreApplication::processEvents();
QCOMPARE(count, 2);
QCOMPARE(obj.value, QString("there"));
}
#endif
{ // member
QFuture<QString> f = Utils::asyncRun([] { return QString("Hi"); });
ObjWithProperty obj;
Utils::onResultReady(f, &obj, &ObjWithProperty::setValue);
f.waitForFinished();
QCoreApplication::processEvents();
QCOMPARE(obj.value, QString("Hi"));
}
}
void tst_Async::futureSynchonizer()
{
auto lambda = [](QPromise<int> &promise) {
while (true) {
if (promise.isCanceled()) {
promise.future().cancel();
promise.finish();
return;
}
QThread::msleep(100);
}
};
FutureSynchronizer synchronizer;
synchronizer.setCancelOnWait(false);
{
Async<int> task;
task.setConcurrentCallData(lambda);
task.setFutureSynchronizer(&synchronizer);
task.start();
QThread::msleep(10);
// We assume here that worker thread will still work for about 90 ms.
QVERIFY(!task.isCanceled());
QVERIFY(!task.isDone());
}
synchronizer.flushFinishedFutures();
QVERIFY(!synchronizer.isEmpty());
// The destructor of synchronizer should wait for about 90 ms for worker thread to be canceled
}
void multiplyBy2(QPromise<int> &promise, int input) { promise.addResult(input * 2); }
void tst_Async::taskTree()
{
using namespace Tasking;
int value = 1;
const auto setupIntAsync = [&](Async<int> &task) {
task.setConcurrentCallData(multiplyBy2, value);
};
const auto handleIntAsync = [&](const Async<int> &task) {
value = task.result();
};
const Group recipe {
AsyncTask<int>(setupIntAsync, handleIntAsync, CallDone::OnSuccess),
AsyncTask<int>(setupIntAsync, handleIntAsync, CallDone::OnSuccess),
AsyncTask<int>(setupIntAsync, handleIntAsync, CallDone::OnSuccess),
AsyncTask<int>(setupIntAsync, handleIntAsync, CallDone::OnSuccess),
};
QCOMPARE(TaskTree::runBlocking(recipe.withTimeout(1000ms)), DoneWith::Success);
QCOMPARE(value, 16);
}
static int returnxx(int x)
{
return x * x;
}
static void returnxxWithPromise(QPromise<int> &promise, int x)
{
promise.addResult(x * x);
}
static double s_sum = 0;
static QList<double> s_results;
void tst_Async::mapReduce_data()
{
using namespace Tasking;
QTest::addColumn<Group>("recipe");
QTest::addColumn<double>("sum");
QTest::addColumn<QList<double>>("results");
const auto initTree = [] {
s_sum = 0;
s_results.append(s_sum);
};
const auto setupAsync = [](Async<int> &task, int input) {
task.setConcurrentCallData(returnxx, input);
};
const auto setupAsyncWithFI = [](Async<int> &task, int input) {
task.setConcurrentCallData(returnxxWithPromise, input);
};
const auto setupAsyncWithTP = [this](Async<int> &task, int input) {
task.setConcurrentCallData(returnxx, input);
task.setThreadPool(&m_threadPool);
};
const auto handleAsync = [](const Async<int> &task) {
s_sum += task.result();
s_results.append(task.result());
};
const auto handleTreeParallel = [] {
s_sum /= 2;
s_results.append(s_sum);
Utils::sort(s_results); // mapping order is undefined
};
const auto handleTreeSequential = [] {
s_sum /= 2;
s_results.append(s_sum);
};
using namespace Tasking;
using namespace std::placeholders;
using SetupHandler = std::function<void(Async<int> &task, int input)>;
using DoneHandler = std::function<void()>;
const auto createTask = [=](const GroupItem &executeMode,
const SetupHandler &setupHandler,
const DoneHandler &doneHandler) {
return Group {
executeMode,
onGroupSetup(initTree),
AsyncTask<int>(std::bind(setupHandler, _1, 1), handleAsync, CallDone::OnSuccess),
AsyncTask<int>(std::bind(setupHandler, _1, 2), handleAsync, CallDone::OnSuccess),
AsyncTask<int>(std::bind(setupHandler, _1, 3), handleAsync, CallDone::OnSuccess),
AsyncTask<int>(std::bind(setupHandler, _1, 4), handleAsync, CallDone::OnSuccess),
AsyncTask<int>(std::bind(setupHandler, _1, 5), handleAsync, CallDone::OnSuccess),
onGroupDone(doneHandler, CallDone::OnSuccess)
};
};
const Group parallelRoot = createTask(parallel, setupAsync, handleTreeParallel);
const Group parallelRootWithFI = createTask(parallel, setupAsyncWithFI, handleTreeParallel);
const Group parallelRootWithTP = createTask(parallel, setupAsyncWithTP, handleTreeParallel);
const Group sequentialRoot = createTask(sequential, setupAsync, handleTreeSequential);
const Group sequentialRootWithFI = createTask(sequential, setupAsyncWithFI, handleTreeSequential);
const Group sequentialRootWithTP = createTask(sequential, setupAsyncWithTP, handleTreeSequential);
const double defaultSum = 27.5;
const QList<double> defaultResult{0., 1., 4., 9., 16., 25., 27.5};
QTest::newRow("Parallel") << parallelRoot << defaultSum << defaultResult;
QTest::newRow("ParallelWithFutureInterface") << parallelRootWithFI << defaultSum << defaultResult;
QTest::newRow("ParallelWithThreadPool") << parallelRootWithTP << defaultSum << defaultResult;
QTest::newRow("Sequential") << sequentialRoot << defaultSum << defaultResult;
QTest::newRow("SequentialWithFutureInterface") << sequentialRootWithFI << defaultSum << defaultResult;
QTest::newRow("SequentialWithThreadPool") << sequentialRootWithTP << defaultSum << defaultResult;
const auto setupSimpleAsync = [](Async<int> &task, int input) {
task.setConcurrentCallData([](int input) { return input * 2; }, input);
};
const auto handleSimpleAsync = [](const Async<int> &task) {
s_sum += task.result() / 4.;
s_results.append(s_sum);
};
const Group simpleRoot = {
sequential,
onGroupSetup([] { s_sum = 0; }),
AsyncTask<int>(std::bind(setupSimpleAsync, _1, 1), handleSimpleAsync, CallDone::OnSuccess),
AsyncTask<int>(std::bind(setupSimpleAsync, _1, 2), handleSimpleAsync, CallDone::OnSuccess),
AsyncTask<int>(std::bind(setupSimpleAsync, _1, 3), handleSimpleAsync, CallDone::OnSuccess)
};
QTest::newRow("Simple") << simpleRoot << 3.0 << QList<double>({.5, 1.5, 3.});
const auto setupStringAsync = [](Async<int> &task, const QString &input) {
task.setConcurrentCallData([](const QString &input) -> int { return input.size(); }, input);
};
const auto handleStringAsync = [](const Async<int> &task) {
s_sum /= task.result();
};
const Group stringRoot = {
parallel,
onGroupSetup([] { s_sum = 90.0; }),
AsyncTask<int>(std::bind(setupStringAsync, _1, "blubb"), handleStringAsync, CallDone::OnSuccess),
AsyncTask<int>(std::bind(setupStringAsync, _1, "foo"), handleStringAsync, CallDone::OnSuccess),
AsyncTask<int>(std::bind(setupStringAsync, _1, "blah"), handleStringAsync, CallDone::OnSuccess)
};
QTest::newRow("String") << stringRoot << 1.5 << QList<double>({});
}
void tst_Async::mapReduce()
{
QThreadPool pool;
s_sum = 0;
s_results.clear();
using namespace Tasking;
QFETCH(Group, recipe);
QFETCH(double, sum);
QFETCH(QList<double>, results);
QCOMPARE(TaskTree::runBlocking(recipe.withTimeout(1000ms)), DoneWith::Success);
QCOMPARE(s_results, results);
QCOMPARE(s_sum, sum);
}
QTEST_GUILESS_MAIN(tst_Async)
#include "tst_async.moc"
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