[jgardou] 64879: [WIN32K] - Fix a few usages of UserSetCursor - Defer the actual freeing of cursor resources to when the object is freed for real. CORE-7575

Author: jgardou
Date: Tue Oct 21 19:57:03 2014
New Revision: 64879

URL: http://svn.reactos.org/svn/reactos?rev=64879&view=rev
Log:
[WIN32K]
 - Fix a few usages of UserSetCursor
 - Defer the actual freeing of cursor resources to when the object is freed for real.
CORE-7575

Modified:
    trunk/reactos/win32ss/user/ntuser/cursoricon.h
    trunk/reactos/win32ss/user/ntuser/cursoricon_new.c
    trunk/reactos/win32ss/user/ntuser/defwnd.c
    trunk/reactos/win32ss/user/ntuser/desktop.c
    trunk/reactos/win32ss/user/ntuser/display.c
    trunk/reactos/win32ss/user/ntuser/object.c
    trunk/reactos/win32ss/user/ntuser/object.h

Modified: trunk/reactos/win32ss/user/ntuser/cursoricon.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/cursor…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/cursoricon.h	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/cursoricon.h	[iso-8859-1] Tue Oct 21 19:57:03 2014
@@ -46,6 +46,8 @@
 
 VOID FASTCALL
 IntCleanupCurIconCache(PPROCESSINFO Win32Process);
+
+void FreeCurIconObject(PVOID Object);
 
 #else
 

Modified: trunk/reactos/win32ss/user/ntuser/cursoricon_new.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/cursor…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/cursoricon_new.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/cursoricon_new.c	[iso-8859-1] Tue Oct 21 19:57:03
2014
@@ -150,7 +150,19 @@
 }
 
 BOOLEAN
-IntDestroyCurIconObject(PVOID Object)
+IntDestroyCurIconObject(
+    _In_ PVOID Object)
+{
+    PCURICON_OBJECT CurIcon = Object;
+
+    /* We just mark the handle as being destroyed.
+     * Deleting all the stuff will be deferred to the actual struct free. */
+    return UserDeleteObject(CurIcon->head.h, TYPE_CURSOR);
+}
+
+void
+FreeCurIconObject(
+    _In_ PVOID Object)
 {
     PCURICON_OBJECT CurIcon = Object;
     
@@ -220,7 +232,8 @@
         }
     }
 
-    return TRUE;
+    /* Finally free the thing */
+    FreeProcMarkObject(CurIcon);
 }
 
 VOID FASTCALL

Modified: trunk/reactos/win32ss/user/ntuser/defwnd.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/defwnd…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/defwnd.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/defwnd.c	[iso-8859-1] Tue Oct 21 19:57:03 2014
@@ -675,13 +675,17 @@
       {
           UserShowCursor( FALSE );
 #ifdef NEW_CURSORICON
-          UserSetCursor(OldCursor, FALSE);
+          OldCursor = UserSetCursor(OldCursor, FALSE);
 #else
           IntSetCursor( hOldCursor );
 #endif
       }
 #ifdef NEW_CURSORICON
-      UserDereferenceObject(DragCursor);
+      /* It could be that the cursor was already changed while we were proceeding,
+       * so we must unreference whatever cursor was current at the time we restored the
old one.
+       * Maybe it is DragCursor, but maybe it is another one and DragCursor got already
freed.
+       */
+      UserDereferenceObject(OldCursor);
 #else
       IntDestroyCursor( hDragCursor, FALSE );
 #endif

Modified: trunk/reactos/win32ss/user/ntuser/desktop.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/deskto…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/desktop.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/desktop.c	[iso-8859-1] Tue Oct 21 19:57:03 2014
@@ -662,9 +662,15 @@
           {
               return TRUE;
           }
+#ifdef NEW_CURSORICON
+          pcurNew->CURSORF_flags |= CURSORF_CURRENT;
+#endif
           pcurOld = UserSetCursor(pcurNew, FALSE);
           if (pcurOld)
           {
+#ifdef NEW_CURSORICON
+               pcurOld->CURSORF_flags &= ~CURSORF_CURRENT;
+#endif
                UserDereferenceObject(pcurOld);
           }
           return TRUE;

Modified: trunk/reactos/win32ss/user/ntuser/display.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/displa…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/display.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/display.c	[iso-8859-1] Tue Oct 21 19:57:03 2014
@@ -761,7 +761,8 @@
         ulResult = PDEVOBJ_bSwitchMode(ppdev, pdm);
 
         /* Restore mouse pointer, no hooks called */
-        UserSetCursor(pvOldCursor, TRUE);
+        pvOldCursor = UserSetCursor(pvOldCursor, TRUE);
+        ASSERT(pvOldCursor == NULL);
 
         /* Check for failure */
         if (!ulResult)

Modified: trunk/reactos/win32ss/user/ntuser/object.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/object…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/object.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/object.c	[iso-8859-1] Tue Oct 21 19:57:03 2014
@@ -168,7 +168,7 @@
     return ObjHead;
 }
 
-static void FreeProcMarkObject(
+void FreeProcMarkObject(
     _In_ PVOID Object)
 {
     PPROCESSINFO ppi = ((PPROCMARKHEAD)Object)->ppi;
@@ -221,7 +221,7 @@
 #ifndef NEW_CURSORICON
     { AllocProcMarkObject,      /*UserCursorCleanup*/NULL,  FreeProcMarkObject },   /*
TYPE_CURSOR */
 #else
-    { AllocProcMarkObject,      IntDestroyCurIconObject,    FreeProcMarkObject },   /*
TYPE_CURSOR */
+    { AllocProcMarkObject,      IntDestroyCurIconObject,    FreeCurIconObject },    /*
TYPE_CURSOR */
 #endif
     { AllocSysObject,           /*UserSetWindowPosCleanup*/NULL, FreeSysObject },   /*
TYPE_SETWINDOWPOS */
     { AllocDeskThreadObject,    IntRemoveHook,              FreeDeskThreadObject }, /*
TYPE_HOOK */

Modified: trunk/reactos/win32ss/user/ntuser/object.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/object…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/object.h	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/object.h	[iso-8859-1] Tue Oct 21 19:57:03 2014
@@ -56,4 +56,6 @@
     UserDereferenceObject(obj);
 }
 
+void FreeProcMarkObject(_In_ PVOID Object);
+
 /* EOF */