5.6.35

1 files changed, 13 insertions, 1 deletions

diff --git a/storage/perfschema/pfs_lock.h b/storage/perfschema/pfs_lock.h
index c429d934702..339a893c833 100644
--- a/storage/perfschema/pfs_lock.h
+++ b/storage/perfschema/pfs_lock.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+/* Copyright (c) 2009, 2016, Oracle and/or its affiliates. All rights reserved.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -156,6 +156,18 @@ struct pfs_lock
   }
 
   /**
+    Initialize a lock to dirty.
+  */
+  void set_dirty(void)
+  {
+    /* Do not set the version to 0, read the previous value. */
+    uint32 copy= PFS_atomic::load_u32(&m_version_state);
+    /* Increment the version, set the DIRTY state */
+    uint32 new_val= (copy & VERSION_MASK) + VERSION_INC + PFS_LOCK_DIRTY;
+    PFS_atomic::store_u32(&m_version_state, new_val);
+  }
+
+  /**
     Execute a dirty to free transition.
     This transition should be executed by the writer that owns the record.
   */