Hi Carlos, Could you comment here, as this was your text in pthread_rwlockattr_setkind_np(3)? On 6/25/20 2:32 PM, Kumar Kartikeya Dwivedi wrote: > Hi, > In pthread_rwlockattr_setkind_np(3), the explanation for > PTHREAD_RWLOCK_PREFER_WRITER_NP reads: > >> This is ignored by glibc because the POSIX requirement to support >> recursive writer locks would cause this option to create trivial >> deadlocks; > > I think this should be "reader locks" instead, since it is > undefined[1] for a thread holding a write lock to call > pthread_rwlock_wrlock(3) again (glibc returns EDEADLK, musl simply > deadlocks). There's no such requirement in POSIX either. Please let me > know if I'm missing something. > > [1]: https://pubs.opengroup.org/onlinepubs/007908799/xsh/pthread_rwlock_wrlock.html Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
