Searched hist:287556 (Results 1 - 1 of 1) sorted by relevance
| /freebsd-11.0-release/lib/libthr/thread/ | ||
| H A D | thr_once.c | diff 287556 Tue Sep 08 08:45:54 MDT 2015 kib In the pthread_once(), if the initializer has already run, then the calling thread is supposed to see accesses issued by the initializer. This means that the read of the once_control->state variable should have an acquire semantic. Use atomic_thread_fence_acq() when the value read is ONCE_DONE, instead of straightforward atomic_load_acq(), to only put a barrier when needed (*). On the other hand, the updates of the once_control->state with the intermediate progress state do not need to synchronize with other state accesses, remove _acq suffix. Reviewed by: alc (previous version) Suggested by: alc (*) Sponsored by: The FreeBSD Foundation MFC after: 1 week |
Completed in 48 milliseconds