+#ifndef _POST_TO_MAIN_THREAD_H
+#define _POST_TO_MAIN_THREAD_H 1
+
+#include <QApplication>
+#include <QObject>
+#include <future>
+#include <memory>
+
+// http://stackoverflow.com/questions/21646467/how-to-execute-a-functor-in-a-given-thread-in-qt-gcd-style
+template<typename F>
+static inline void post_to_main_thread(F &&fun)
+{
+ QObject signalSource;
+ QObject::connect(&signalSource, &QObject::destroyed, qApp, std::move(fun));
+}
+
+template<typename F>
+static inline void post_to_main_thread_and_wait(F &&fun)
+{
+ std::promise<void> done_promise;
+ std::future<void> done = done_promise.get_future();
+ post_to_main_thread(std::move(fun));
+ post_to_main_thread([&done_promise] { done_promise.set_value(); });
+ done.wait();
+}
+
+#endif // !defined(_POST_TO_MAIN_THREAD_H)