Yes spinning a system thread(pthread) and then creating the application object. On sigterm, quitting the application using quit() and just before quit() deleting QApplication Instance and then pthread is cleaned up using pthread_cancel
On Sat, 5 Jan, 2019, 07:42 Konstantin Shegunov <kshegu...@gmail.com wrote: > On Thu, Jan 3, 2019 at 4:17 PM Roland Hughes <rol...@logikalsolutions.com> > wrote: > >> >> On 1/3/2019 4:00 AM, Konstantin Shegunov wrote: >> >> Yes QApplication destructor is invoked last..Does it makes sense to use >> >> deleteLater() in the widget destructors instead of existing delete if >> it >> >> could be cleaned up as part of qApp-quit()? >> >> >> > Your example code clearly shows otherwise. You have a QObject that's >> > created before and destroyed after the application object. >> >> Wow! >> >> Perhaps a better question would be, "How is it that doesn't fault today?" > > Just wondering if the test compilation "worked" due to luck of the draw. >> > > I don't know, I'm not intimately familiar with all the internals. > QObjects, I think, rely/relied on a global state that's initialized in > QCoreApplication. What I can say for sure is that thread information is > initialized by the application object. Just for illustration purposes, this > is also the reason why you can't run a QThread and have the application > object in its QThread::run override. The thread object is going to set up > the global thread info and then you're going to get weirdness - warnings > such as "Not creating the application object in the main/GUI thread". > Possibly segfaults at exit. If you actually need to do such stuff you > really need to spin a system thread (std::thread, pthread, w/e) and then > create the application object (besides issues you have with the event loop > integration on osx). > > So, even if it worked before, it had been wrong all along, so it should be > fixed anyway. > _______________________________________________ > Interest mailing list > Interest@qt-project.org > https://lists.qt-project.org/listinfo/interest >
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