> On 13 Jul 2015, at 09:57, David Chisnall <david.chisn...@cl.cam.ac.uk> wrote: > > On 10 Jul 2015, at 20:18, Riccardo Mottola <riccardo.mott...@libero.it> wrote: >> >> Hi, >> >> I detach a thread "normally" with: >> >> [updateButton setEnabled:NO]; >> [NSThread detachNewThreadSelector:@selector(updateData:) toTarget:self >> withObject:nil]; >> >> It executes everything as expected, but I continuously get: >> WARNING thread 0x2c63c1a8 terminated without calling +exit! >> >> I have done something similar with other threads and I don't get this error. >> What could be happening? Some sort of premature exit? It executes up to the >> last statement. > > This message also appears for threads that are not created with NSThread, > which is quite annoying. I use some of the C++11 threading support for some > worker threads and I get a message when they exit.
This message indicates a bug in the program as far as I can tell from looking at the source; It’s generated by the handler set by pthread_key_create() and should only be called if the thread exits while the thread-specific data associate with the key (ie the NSThread object) is non-null. When a thread is detached by NSThread, it runs a method and calls +exit when the method completes, and +exit destroys the NSThread object and sets the thread-specific data to null. When a non-gnustep thread is used for gnustep code, there are two functions provided to register/deregister it (and the latter similarly destroys the NSThread instance and nulls-out the thread-specific variable). So seeing the message means that a thread has somehow exited without cleaning up its gnustep related thread-specific data (thus leaking an NSThread instance and a presumably other related objects). I don’t see how that can happen other than by an application level bug (ie some code in that thread calls pthread_exit() or something similar). Of course, I may have missed spotting some race condition or logic error in the code ... _______________________________________________ Gnustep-dev mailing list Gnustep-dev@gnu.org https://lists.gnu.org/mailman/listinfo/gnustep-dev
