diff options
Diffstat (limited to 'src/mongo/db/concurrency/locker.h')
| -rw-r--r-- | src/mongo/db/concurrency/locker.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/mongo/db/concurrency/locker.h b/src/mongo/db/concurrency/locker.h index d1ea2830a91..ee4b7118b5d 100644 --- a/src/mongo/db/concurrency/locker.h +++ b/src/mongo/db/concurrency/locker.h @@ -206,8 +206,8 @@ public: /** * beginWriteUnitOfWork/endWriteUnitOfWork are called at the start and end of WriteUnitOfWorks. - * They can be used to implement two-phase locking. Each call to begin should be matched with an - * eventual call to end. + * They can be used to implement two-phase locking. Each call to begin or restore should be + * matched with an eventual call to end or release. * * endWriteUnitOfWork, if not called in a nested WUOW, will release all two-phase locking held * lock resources. @@ -375,6 +375,15 @@ public: virtual void restoreLockState(const LockSnapshot& stateToRestore) = 0; /** + * releaseWriteUnitOfWork opts out two-phase locking and yield the locks after a WUOW + * has been released. restoreWriteUnitOfWork reaquires the locks and resume the two-phase + * locking behavior of WUOW. + */ + virtual bool releaseWriteUnitOfWork(LockSnapshot* stateOut) = 0; + virtual void restoreWriteUnitOfWork(OperationContext* opCtx, + const LockSnapshot& stateToRestore) = 0; + + /** * Releases the ticket associated with the Locker. This allows locks to be held without * contributing to reader/writer throttling. */ |