[fireball] 59494: [DDK] - Fix ExAllocateFromZone. I understand it's deprecated, but it having a broken implementation which can't work at all because the one who coded this function failed to under...

Author: fireball
Date: Tue Jul 16 19:57:12 2013
New Revision: 59494

URL: http://svn.reactos.org/svn/reactos?rev=59494&view=rev
Log:
[DDK]
- Fix ExAllocateFromZone. I understand it's deprecated, but it having a broken
implementation which can't work at all because the one who coded this function failed
to understand basic algorithms of linked lists is nonsense.

Modified:
    trunk/reactos/include/ddk/ntddk.h
    trunk/reactos/include/xdk/exfuncs.h

Modified: trunk/reactos/include/ddk/ntddk.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/include/ddk/ntddk.h?rev=59…
==============================================================================
--- trunk/reactos/include/ddk/ntddk.h	[iso-8859-1] (original)
+++ trunk/reactos/include/ddk/ntddk.h	[iso-8859-1] Tue Jul 16 19:57:12 2013
@@ -3350,9 +3350,10 @@
 ExAllocateFromZone(
   IN PZONE_HEADER Zone)
 {
+  PVOID Result = (PVOID)Zone->FreeList.Next;
   if (Zone->FreeList.Next)
     Zone->FreeList.Next = Zone->FreeList.Next->Next;
-  return (PVOID) Zone->FreeList.Next;
+  return Result;
 }
 
 static __inline PVOID

Modified: trunk/reactos/include/xdk/exfuncs.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/include/xdk/exfuncs.h?rev=…
==============================================================================
--- trunk/reactos/include/xdk/exfuncs.h	[iso-8859-1] (original)
+++ trunk/reactos/include/xdk/exfuncs.h	[iso-8859-1] Tue Jul 16 19:57:12 2013
@@ -276,9 +276,10 @@
 ExAllocateFromZone(
   IN PZONE_HEADER Zone)
 {
+  PVOID Result = (PVOID)Zone->FreeList.Next;
   if (Zone->FreeList.Next)
     Zone->FreeList.Next = Zone->FreeList.Next->Next;
-  return (PVOID) Zone->FreeList.Next;
+  return Result;
 }
 
 static __inline PVOID