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| author | Carlos O'Donell <carlos@systemhalted.org> | 2017-07-28 00:22:44 -0400 |
|---|---|---|
| committer | Carlos O'Donell <carlos@systemhalted.org> | 2017-07-28 00:23:58 -0400 |
| commit | faf8c066df0d6bccb54bd74dd696eeb65e1b3bbc (patch) | |
| tree | af22c223947b73a7c22f3add45da6b5c8f204672 /support/xthread.h | |
| parent | 2557ae38f3aa599718f34317cd0c150892a92be5 (diff) | |
| download | glibc-faf8c066df0d6bccb54bd74dd696eeb65e1b3bbc.tar.gz | |
rwlock: Fix explicit hand-over (bug 21298)
Without this fix, the rwlock can fail to execute the explicit hand-over
in certain cases (e.g., empty critical sections that switch quickly between
read and write phases). This can then lead to errors in how __wrphase_futex
is accessed, which in turn can lead to deadlocks.
Diffstat (limited to 'support/xthread.h')
| -rw-r--r-- | support/xthread.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/support/xthread.h b/support/xthread.h index 3552a73e4f..472763ebe8 100644 --- a/support/xthread.h +++ b/support/xthread.h @@ -74,6 +74,14 @@ void xpthread_attr_setguardsize (pthread_attr_t *attr, PTHREAD_BARRIER_SERIAL_THREAD. */ int xpthread_barrier_wait (pthread_barrier_t *barrier); +void xpthread_rwlock_init (pthread_rwlock_t *rwlock, + const pthread_rwlockattr_t *attr); +void xpthread_rwlockattr_init (pthread_rwlockattr_t *attr); +void xpthread_rwlockattr_setkind_np (pthread_rwlockattr_t *attr, int pref); +void xpthread_rwlock_wrlock (pthread_rwlock_t *rwlock); +void xpthread_rwlock_rdlock (pthread_rwlock_t *rwlock); +void xpthread_rwlock_unlock (pthread_rwlock_t *rwlock); + __END_DECLS #endif /* SUPPORT_THREAD_H */ |