diff options
Diffstat (limited to 'nptl/pthread_mutex_unlock.c')
| -rw-r--r-- | nptl/pthread_mutex_unlock.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/nptl/pthread_mutex_unlock.c b/nptl/pthread_mutex_unlock.c index 9ea62943b7..68d04d5395 100644 --- a/nptl/pthread_mutex_unlock.c +++ b/nptl/pthread_mutex_unlock.c @@ -35,6 +35,8 @@ int attribute_hidden __pthread_mutex_unlock_usercnt (pthread_mutex_t *mutex, int decr) { + /* See concurrency notes regarding mutex type which is loaded from __kind + in struct __pthread_mutex_s in sysdeps/nptl/bits/thread-shared-types.h. */ int type = PTHREAD_MUTEX_TYPE_ELISION (mutex); if (__builtin_expect (type & ~(PTHREAD_MUTEX_KIND_MASK_NP|PTHREAD_MUTEX_ELISION_FLAGS_NP), 0)) @@ -222,13 +224,19 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr) /* If the previous owner died and the caller did not succeed in making the state consistent, mark the mutex as unrecoverable and make all waiters. */ - if ((mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP) != 0 + /* See concurrency notes regarding __kind in struct __pthread_mutex_s + in sysdeps/nptl/bits/thread-shared-types.h. */ + if ((atomic_load_relaxed (&(mutex->__data.__kind)) + & PTHREAD_MUTEX_ROBUST_NORMAL_NP) != 0 && __builtin_expect (mutex->__data.__owner == PTHREAD_MUTEX_INCONSISTENT, 0)) pi_notrecoverable: newowner = PTHREAD_MUTEX_NOTRECOVERABLE; - if ((mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP) != 0) + /* See concurrency notes regarding __kind in struct __pthread_mutex_s + in sysdeps/nptl/bits/thread-shared-types.h. */ + if ((atomic_load_relaxed (&(mutex->__data.__kind)) + & PTHREAD_MUTEX_ROBUST_NORMAL_NP) != 0) { continue_pi_robust: /* Remove mutex from the list. @@ -251,7 +259,10 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr) /* Unlock. Load all necessary mutex data before releasing the mutex to not violate the mutex destruction requirements (see lll_unlock). */ - int robust = mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP; + /* See concurrency notes regarding __kind in struct __pthread_mutex_s + in sysdeps/nptl/bits/thread-shared-types.h. */ + int robust = atomic_load_relaxed (&(mutex->__data.__kind)) + & PTHREAD_MUTEX_ROBUST_NORMAL_NP; private = (robust ? PTHREAD_ROBUST_MUTEX_PSHARED (mutex) : PTHREAD_MUTEX_PSHARED (mutex)); |