SERVER-4328 lock the dblock first before the toplock

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mongo/db/d_concurrency.h b/src/mongo/db/d_concurrency.h
index ab3f211e5db..085f5775fec 100644
--- a/src/mongo/db/d_concurrency.h
+++ b/src/mongo/db/d_concurrency.h
@@ -46,6 +46,7 @@ namespace mongo {
         };
         // lock this database. do not shared_lock globally first, that is handledin herein. 
         class DBWrite : boost::noncopyable {
+            bool prep(LockState&);
             void lockTop(LockState&);
             void lockLocal();
             void lock(const string& db);
@@ -58,6 +59,7 @@ namespace mongo {
         };
         // lock this database for reading. do not shared_lock globally first, that is handledin herein. 
         class DBRead : boost::noncopyable {
+            bool prep(LockState&);
             void lockTop(LockState&);
             void lockLocal();
             void lock(const string& db);