On Tuesday 10 February 2015 22:26:50 Thiago Macieira wrote: > It's not insurmountable. I can think of two solutions: > 1) pre-allocate enough space for the UTF-16 data (strlen(utf8) * 2), so > that the const functions can implicitly write to the UTF-16 block when > needed. Since the original UTF-8 data is constant and if there are no > out-of-thin-air values, multiple threads could do this operation > simultaneously safely.
No, they can't. The writes conflict and neither happens-before the other -> data race -> UB. Your #2 is sound, of course, as long as readers loadAcquire the utf16 data pointer. -- Marc Mutz <marc.m...@kdab.com> | Senior Software Engineer KDAB (Deutschland) GmbH & Co.KG, a KDAB Group Company www.kdab.com || Germany +49-30-521325470 || Sweden (HQ) +46-563-540090 KDAB - Qt Experts - Platform-Independent Software Solutions _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
