rename #2

src/util/PostToThread.hpp

@@ -0,0 +1,60 @@
+#pragma once
+
+#include <QCoreApplication>
+
+#include <QRunnable>
+#include <QThreadPool>
+
+#include <functional>
+
+#define async_exec(a) QThreadPool::globalInstance()->start(new LambdaRunnable(a));
+
+namespace chatterino {
+namespace util {
+
+class LambdaRunnable : public QRunnable
+{
+public:
+    LambdaRunnable(std::function<void()> action)
+    {
+        this->action = action;
+    }
+
+    void run()
+    {
+        this->action();
+    }
+
+private:
+    std::function<void()> action;
+};
+
+// Taken from
+// https://stackoverflow.com/questions/21646467/how-to-execute-a-functor-or-a-lambda-in-a-given-thread-in-qt-gcd-style
+// Qt 5/4 - preferred, has least allocations
+template <typename F>
+static void postToThread(F &&fun, QObject *obj = qApp)
+{
+    struct Event : public QEvent {
+        using Fun = typename std::decay<F>::type;
+        Fun fun;
+        Event(Fun &&fun)
+            : QEvent(QEvent::None)
+            , fun(std::move(fun))
+        {
+        }
+        Event(const Fun &fun)
+            : QEvent(QEvent::None)
+            , fun(fun)
+        {
+        }
+        ~Event() override
+        {
+            fun();
+        }
+    };
+    QCoreApplication::postEvent(obj, new Event(std::forward<F>(fun)));
+}
+
+}  // namespace util
+}  // namespace chatterino