More linux fixes

Author: kunitoki

modules/yup_events/messages/yup_MessageManager.cpp

@@ -153,8 +153,10 @@ void MessageManager::runDispatchLoop()
 
 void MessageManager::stopDispatchLoop()
 {
-    (new QuitMessage())->post();
+    quitMessageReceived = true;
     quitMessagePosted = true;
+
+    (new QuitMessage())->post();
 }
 
 #if YUP_MODAL_LOOPS_PERMITTED

modules/yup_events/native/yup_Messaging_linux.cpp

@@ -338,6 +338,12 @@ bool yup_dispatchNextMessageOnSystemQueue (bool returnIfNoPendingMessages)
         if (LinuxErrorHandling::keyboardBreakOccurred)
             YUPApplicationBase::quit();
 
+        if (auto* mm = MessageManager::getInstanceWithoutCreating())
+        {
+            if (mm->hasStopMessageBeenSent())
+                return false;
+        }
+
         auto* runLoop = InternalRunLoop::getInstanceWithoutCreating();
         if (runLoop == nullptr)
             return false;