// Copyright 2017 Dolphin Emulator Project // Licensed under GPLv2+ // Refer to the license.txt file included. #pragma once #include #include #include #include "Common/Event.h" #include "DolphinQt2/QtUtils/QueueOnObject.h" class QObject; // QWidget and subclasses are not thread-safe! This helper takes arbitrary code from any thread, // safely runs it on the appropriate GUI thread, waits for it to finish, and returns the result. template auto RunOnObject(QObject* object, F&& functor) { // If we queue up a functor on the current thread, it won't run until we return to the event loop, // which means waiting for it to finish will never complete. Instead, run it immediately. if (object->thread() == QThread::currentThread()) return functor(); Common::Event event; std::result_of_t result; QueueOnObject(object, [&event, &result, functor = std::forward(functor) ] { result = functor(); event.Set(); }); event.Wait(); return result; }