QTaskBuilder::spawn: add an overload that doesn't return a future object

Fixes: QTBUG-83175
Change-Id: Idf85e47a2732742884272200d5c753805eaa640b
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/auto/concurrent/qtconcurrenttask/tst_qtconcurrenttask.cpp b/tests/auto/concurrent/qtconcurrenttask/tst_qtconcurrenttask.cpp
index 0d08efa463..b8a82dfa14 100644
--- a/tests/auto/concurrent/qtconcurrenttask/tst_qtconcurrenttask.cpp
+++ b/tests/auto/concurrent/qtconcurrenttask/tst_qtconcurrenttask.cpp
@@ -43,6 +43,7 @@ private Q_SLOTS:
     void useCustomThreadPool();
     void setPriority();
     void adjustAllSettings();
+    void ignoreFutureResult();
 };
 
 using namespace QtConcurrent;
@@ -155,6 +156,20 @@ void tst_QtConcurrentTask::adjustAllSettings()
 
     QCOMPARE(result, QVector<int>({1, 2, 3}));
 }
+void tst_QtConcurrentTask::ignoreFutureResult()
+{
+    QThreadPool pool;
+
+    std::atomic_int value = 0;
+    for (std::size_t i = 0; i < 10; ++i)
+        task([&value]{ ++value; })
+            .onThreadPool(pool)
+            .spawn(FutureResult::Ignore);
+
+    pool.waitForDone();
+
+    QCOMPARE(value, 10);
+}
 
 QTEST_MAIN(tst_QtConcurrentTask)
 #include "tst_qtconcurrenttask.moc"