Am Montag, den 19.01.2009, 00:26 +0100 schrieb Kevin Kofler: > Only system mutexes (POSIX, OpenMP etc.) and some GCC extensions (e.g. > __sync_fetch_and_add) are guaranteed to be thread-safe, custom hacks can > often be a source of trouble (and I'm not sure volatile is a complete fix - > for counters, it can even be counterproductive, as it normally generates > read/add/write sequences, not in-place adds). Thanks. I do not need atomic counters. I need only the counter to be set to its new value before setting the boolean. But, as I have learned from parallel programming: If one needs atomic counters, he mostly needs atomic increase-and-check or atomic decrease-and-check. But that functions seem not to be provided by atomic.h. Are they provided elsewhere? Simple atomic increases or atomic decreases are without need, in most cases. Joerg Bergmann -- fedora-test-list mailing list fedora-test-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list
