On Mon, Jun 03, 2013 at 12:01:02PM +0200, Corinna Vinschen wrote: >On Jun 2 23:01, David Stacey wrote: >> I'm trying to get Poco[1] working under Cygwin, and have hit a >> problem with the way it manages its threads. A short example >> (attached) shows what's going on. >> >> Poco creates a global object that is used for managing various >> threads. In the destructor, the class calls pthread_join() to wait >> for the threads to finish. This works in Fedora (and presumably >> other Linux variants), but under Cygwin this call never returns. >> Note that the object is global, and so pthread_join() is being >> called after main() has returned and the global variables are being >> mopped up. >> >> In the attached example, the problem only exists if the >> 'thread_container' object is global. When run in this way, >> pthread_join() never returns and the programme locks up. If >> 'thread_container' is moved local to main() then the programme works >> correctly. Sadly, I can't make such a trivial fix to the Poco code, >> which rather relies on this object being global. >> >> The attached example (and indeed Poco) runs fine under Fedora 18 >> x64, but locks up on Cygwin (32-bit; haven't tried 64-bit). Problem >> exists with a vanilla cygwin-1.7.18-1 and the most recent snapshot >> (2013-06-02). > >Thanks for the simple testcase! > >I tracked this down to a problem in the process exit handling which >disallowed pthreads to exit when process exit was in progress (and >running the global destructors is part of the process exit). I fixed >that in CVS. > >I'm just uploading a 2013-06-03 snapshot to http://cygwin.com/snapshots/ >as well as generating a 1.7.9-10 cygwin package for the 64 bit test >distro. Please give either one of them a try, especially with poco.
I've reworked this change since Corinna's fix was to what should have been obsolete code. A new snapshot should be uploaded soon. Could you confirm that things still work as expected? cgf -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
