SERVER-33223 Add transaction resource stash

1 files changed, 12 insertions, 0 deletions

diff --git a/src/mongo/db/session_catalog.h b/src/mongo/db/session_catalog.h
index 6aa4e4d0442..0451147f786 100644
--- a/src/mongo/db/session_catalog.h
+++ b/src/mongo/db/session_catalog.h
@@ -251,6 +251,18 @@ public:
 
     static Session* get(OperationContext* opCtx);
 
+    /**
+     * Stash the Locker and RecoveryUnit if both:
+     *  - The current session represents a transaction running in snapshot isolation.
+     *  - The current operation is ending with an open client cursor.
+     */
+    void stashTransactionResources();
+
+    /**
+     * Restore the stashed Locker and RecoveryUnit for the current transaction, if they exist.
+     */
+    void unstashTransactionResources();
+
 private:
     OperationContext* const _opCtx;
 };