qt 6.5.1 original

tests/manual/wasm/eventloop/asyncify_exec/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+qt_internal_add_manual_test(asyncify_exec
+    SOURCES
+        main.cpp
+    LIBRARIES
+        Qt::Core
+)
+
+# Enable asyncify for this test. Also enable optimizations in order to reduce the binary size.
+target_link_options(asyncify_exec PUBLIC -sASYNCIFY -Os)

tests/manual/wasm/eventloop/asyncify_exec/main.cpp

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+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+#include <QtCore>
+
+// This test shows how to use asyncify to enable blocking the main
+// thread on QEventLoop::exec(), while event processing continues.
+int main(int argc, char **argv)
+{
+    QCoreApplication app(argc, argv);
+
+    QTimer::singleShot(1000, []() {
+
+        QEventLoop loop;
+        QTimer::singleShot(2000, [&loop]() {
+            qDebug() << "Calling QEventLoop::quit()";
+            loop.quit();
+        });
+
+        qDebug() << "Calling QEventLoop::exec()";
+        loop.exec();
+        qDebug() << "Returned from QEventLoop::exec()";
+    });
+
+    app.exec();
+}