diff options
Diffstat (limited to 'linuxthreads/rwlock.c')
| -rw-r--r-- | linuxthreads/rwlock.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/linuxthreads/rwlock.c b/linuxthreads/rwlock.c index 7b472e2..e1401c3 100644 --- a/linuxthreads/rwlock.c +++ b/linuxthreads/rwlock.c @@ -362,8 +362,9 @@ pthread_rwlock_unlock (pthread_rwlock_t *rwlock) } rwlock->__rw_writer = NULL; - if (rwlock->__rw_kind == PTHREAD_RWLOCK_PREFER_READER_NP - || (th = dequeue (&rwlock->__rw_write_waiting)) == NULL) + if ((rwlock->__rw_kind == PTHREAD_RWLOCK_PREFER_READER_NP + && !queue_is_empty(&rwlock->__rw_read_waiting)) + || (th = dequeue(&rwlock->__rw_write_waiting)) == NULL) { /* Restart all waiting readers. */ torestart = rwlock->__rw_read_waiting; @@ -477,6 +478,7 @@ pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *attr, int pref) { if (pref != PTHREAD_RWLOCK_PREFER_READER_NP && pref != PTHREAD_RWLOCK_PREFER_WRITER_NP + && pref != PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP && pref != PTHREAD_RWLOCK_DEFAULT_NP) return EINVAL; |