Clang: Share executeInLoop

Change-Id: Id02902e1e7abdb8b3430e7b228547c4372a424ce
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/tools/clangrefactoringbackend/clangrefactoringbackendmain.cpp

@@ -30,6 +30,7 @@
 #include <QDir>
 
 #include <connectionserver.h>
+#include <executeinloop.h>
 #include <filepathcaching.h>
 #include <generatedfiles.h>
 #include <refactoringserver.h>
@@ -51,48 +52,6 @@ using ClangBackEnd::RefactoringDatabaseInitializer;
 using ClangBackEnd::ConnectionServer;
 using ClangBackEnd::SymbolIndexing;
 
-#if QT_VERSION < QT_VERSION_CHECK(5, 10, 0)
-template<typename CallableType>
-class CallableEvent : public QEvent
-{
-public:
-    using Callable = std::decay_t<CallableType>;
-    CallableEvent(Callable &&callable)
-        : QEvent(QEvent::None)
-        , callable(std::move(callable))
-    {}
-    CallableEvent(const Callable &callable)
-        : QEvent(QEvent::None)
-        , callable(callable)
-    {}
-
-    ~CallableEvent() { callable(); }
-
-public:
-    Callable callable;
-};
-
-template<typename Callable>
-void executeInLoop(Callable &&callable, QObject *object = QCoreApplication::instance())
-{
-    if (QThread *thread = qobject_cast<QThread *>(object))
-        object = QAbstractEventDispatcher::instance(thread);
-
-    QCoreApplication::postEvent(object,
-                                new CallableEvent<Callable>(std::forward<Callable>(callable)),
-                                Qt::HighEventPriority);
-}
-#else
-template<typename Callable>
-void executeInLoop(Callable &&callable, QObject *object = QCoreApplication::instance())
-{
-    if (QThread *thread = qobject_cast<QThread *>(object))
-        object = QAbstractEventDispatcher::instance(thread);
-
-    QMetaObject::invokeMethod(object, std::forward<Callable>(callable));
-}
-#endif
-
 QStringList processArguments(QCoreApplication &application)
 {
     QCommandLineParser parser;