[fireball] 41043: - Make ObReferenceObjectEx return the new ref count instead of old ref count. - Fix same bug ObDereferenceObjectEx. - Fix a typo in ObDereferenceObjectEx which resulted in ObpDeferObjectDeletion not being called when needed. Fixes missing object deletions in ObDereferenceObjectEx-using code (e.g. executive timers in reactos kernel). - Original problem found by http://www.reactos.org/forum/viewtopic.php?f=14&t=6969&p=59669, fixes inspired by the discussion too.

Author: fireball
Date: Fri May 22 21:19:27 2009
New Revision: 41043

URL: http://svn.reactos.org/svn/reactos?rev=41043&view=rev
Log:
- Make ObReferenceObjectEx return the new ref count instead of old ref count.
- Fix same bug ObDereferenceObjectEx.
- Fix a typo in ObDereferenceObjectEx which resulted in ObpDeferObjectDeletion not being called when needed. Fixes missing object deletions in ObDereferenceObjectEx-using code (e.g. executive timers in reactos kernel).
- Original problem found by http://www.reactos.org/forum/viewtopic.php?f=14&t=6969&p=59669, fixes inspired by the discussion too.

Modified:
    trunk/reactos/ntoskrnl/ob/obref.c

Modified: trunk/reactos/ntoskrnl/ob/obref.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ob/obref.c?rev=410...
==============================================================================
--- trunk/reactos/ntoskrnl/ob/obref.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ob/obref.c [iso-8859-1] Fri May 22 21:19:27 2009
@@ -80,7 +80,7 @@
     /* Increment the reference count and return the count now */
     return InterlockedExchangeAdd(&OBJECT_TO_OBJECT_HEADER(Object)->
                                   PointerCount,
-                                  Count);
+                                  Count) + Count;
 }

LONG
@@ -95,8 +95,8 @@
     Header = OBJECT_TO_OBJECT_HEADER(Object);

/* Check whether the object can now be deleted. */
-    NewCount = InterlockedExchangeAdd(&Header->PointerCount, -Count);
-    if (!Count) ObpDeferObjectDeletion(Header);
+    NewCount = InterlockedExchangeAdd(&Header->PointerCount, -Count) - Count;
+    if (!NewCount) ObpDeferObjectDeletion(Header);

/* Return the current count */
     return NewCount;