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- Fixed releasing of window object in IntValidateParent and NtUserRedrawWindow. Spotted by Thomas Weidenmuller.

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- Fixed potencial deadlock in IntPaintWindows. Spotted by Thomas Weidenmuller.

svn path=/trunk/; revision=8295
This commit is contained in:
Filip Navara 2004-02-21 22:22:26 +00:00
parent d83db81881
commit f38fdd47c3
1 changed files with 16 additions and 4 deletions
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20
reactos/subsys/win32k/ntuser/painting.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: painting.c,v 1.69 2004/02/21 13:51:13 navaraf Exp $
* $Id: painting.c,v 1.70 2004/02/21 22:22:26 navaraf Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -87,8 +87,15 @@ IntValidateParent(PWINDOW_OBJECT Child, HRGN ValidRegion)
}
ExReleaseFastMutex(&ParentWindow->UpdateLock);
}
IntReleaseWindowObject(ParentWindow);
Parent = NtUserGetAncestor(Parent, GA_PARENT);
if (ParentWindow)
{
IntReleaseWindowObject(ParentWindow);
Parent = NtUserGetAncestor(Parent, GA_PARENT);
}
else
{
return;
}
}
}
@ -103,6 +110,7 @@ IntPaintWindows(PWINDOW_OBJECT Window, ULONG Flags)
{
HDC hDC;
HWND hWnd = Window->Self;
HRGN TempRegion;
if (Flags & (RDW_ERASENOW | RDW_UPDATENOW))
{
@ -113,11 +121,12 @@ IntPaintWindows(PWINDOW_OBJECT Window, ULONG Flags)
{
IntValidateParent(Window, Window->NCUpdateRegion);
}
IntSendMessage(hWnd, WM_NCPAINT, (WPARAM)Window->NCUpdateRegion, 0);
TempRegion = Window->NCUpdateRegion;
Window->NCUpdateRegion = NULL;
Window->Flags &= ~WINDOWOBJECT_NEED_NCPAINT;
MsqDecPaintCountQueue(Window->MessageQueue);
ExReleaseFastMutex(&Window->UpdateLock);
IntSendMessage(hWnd, WM_NCPAINT, (WPARAM)TempRegion, 0);
}
if (Window->Flags & WINDOWOBJECT_NEED_ERASEBKGND)
@ -912,6 +921,7 @@ NtUserRedrawWindow(HWND hWnd, CONST RECT *lprcUpdate, HRGN hrgnUpdate,
if (!NT_SUCCESS(Status))
{
SetLastWin32Error(ERROR_INVALID_PARAMETER);
IntReleaseWindowObject(Wnd);
return FALSE;
}
}
@ -923,9 +933,11 @@ NtUserRedrawWindow(HWND hWnd, CONST RECT *lprcUpdate, HRGN hrgnUpdate,
{
/* IntRedrawWindow fails only in case that flags are invalid */
SetLastWin32Error(ERROR_INVALID_PARAMETER);
IntReleaseWindowObject(Wnd);
return FALSE;
}
IntReleaseWindowObject(Wnd);
return TRUE;
}