diff options
Diffstat (limited to 'src/include/mutex.i')
| -rw-r--r-- | src/include/mutex.i | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/include/mutex.i b/src/include/mutex.i index 52250f84ab3..65956c13c08 100644 --- a/src/include/mutex.i +++ b/src/include/mutex.i @@ -306,6 +306,12 @@ __wt_fair_lock(WT_SESSION_IMPL *session, WT_FAIR_LOCK *lock) __wt_sleep(0, 10); } + /* + * Applications depend on a barrier here so that operations holding the + * lock see consistent data. + */ + WT_READ_BARRIER(); + return (0); } @@ -319,6 +325,12 @@ __wt_fair_unlock(WT_SESSION_IMPL *session, WT_FAIR_LOCK *lock) WT_UNUSED(session); /* + * Ensure that all updates made while the lock was held are visible to + * the next thread to acquire the lock. + */ + WT_WRITE_BARRIER(); + + /* * We have exclusive access - the update does not need to be atomic. */ ++lock->fair_lock_owner; |