[gadamopoulos] 51496: [win32k] - UserSetProcessWindowStation: Use PsGetProcessWin32WindowStation and PsSetProcessWindowStation. Close the prevoious window station handle only when the window statio...

Author: gadamopoulos
Date: Fri Apr 29 17:50:30 2011
New Revision: 51496

URL: http://svn.reactos.org/svn/reactos?rev=51496&view=rev
Log:
[win32k]
- UserSetProcessWindowStation: Use PsGetProcessWin32WindowStation and PsSetProcessWindowStation. Close the prevoious window station handle only when the window station was not set by UserSetProcessWindowStation (should be the case for console apps)

Modified:
    trunk/reactos/include/ndk/psfuncs.h
    trunk/reactos/subsystems/win32/win32k/ntuser/winsta.c

Modified: trunk/reactos/include/ndk/psfuncs.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/include/ndk/psfuncs.h?rev=5...
==============================================================================
--- trunk/reactos/include/ndk/psfuncs.h [iso-8859-1] (original)
+++ trunk/reactos/include/ndk/psfuncs.h [iso-8859-1] Fri Apr 29 17:50:30 2011
@@ -76,6 +76,21 @@
 NTAPI
 PsGetThreadWin32Thread(
     PETHREAD Thread
+);
+
+NTKERNELAPI
+PVOID
+NTAPI
+PsGetProcessWin32WindowStation(
+    PEPROCESS Process
+);
+
+NTKERNELAPI
+VOID
+NTAPI
+PsSetProcessWindowStation(
+    PEPROCESS Process,
+    PVOID WindowStation
 );

NTKERNELAPI

Modified: trunk/reactos/subsystems/win32/win32k/ntuser/winsta.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/ntu...
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/ntuser/winsta.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/win32/win32k/ntuser/winsta.c [iso-8859-1] Fri Apr 29 17:50:30 2011
@@ -940,6 +940,7 @@

ppi = PsGetCurrentProcessWin32Process();

+    /* Reference the new window station */
     if(hWindowStation !=NULL)
     {
         Status = IntValidateWindowStationHandle( hWindowStation,
@@ -956,27 +957,28 @@
     }

OldWinSta = ppi->prpwinsta;
-   hwinstaOld = ppi->hwinsta;
+   hwinstaOld = PsGetProcessWin32WindowStation(ppi->peProcess);
+
+   /* Dereference the previous window station */
+   if(OldWinSta != NULL)
+   {
+       ObDereferenceObject(OldWinSta);
+   }
+
+   /* Check if we have a stale handle (it should happen for console apps) */
+   if(hwinstaOld != ppi->hwinsta)
+   {
+       ObCloseHandle(hwinstaOld, UserMode);
+   }

/*
     * FIXME - don't allow changing the window station if there are threads that are attached to desktops and own gui objects
     */
-
-   InterlockedExchangePointer(&PsGetCurrentProcess()->Win32WindowStation, hWindowStation);
+   
+   PsSetProcessWindowStation(ppi->peProcess, hWindowStation);

ppi->prpwinsta = NewWinSta;
    ppi->hwinsta = hWindowStation;
-
-
-   if(OldWinSta != NULL)
-   {
-       ObDereferenceObject(OldWinSta);
-   }
-
-   if(hwinstaOld != NULL)
-   {
-       ObCloseHandle(hwinstaOld, UserMode);
-   }

return TRUE;
 }