- Do not call KeAttachProcess/keDetachProcess if the current process is the necessary process.

svn path=/trunk/; revision=5638

reactos/subsys/win32k/eng/device.c

@@ -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: device.c,v 1.9 2003/07/11 15:59:37 royce Exp $
+/* $Id: device.c,v 1.10 2003/08/18 10:18:14 hbirr Exp $
  * 
  * COPYRIGHT:         See COPYING in the top level directory
  * PROJECT:           ReactOS kernel
@@ -50,13 +50,18 @@ EngDeviceIoControl(HANDLE  hDevice,
   KEVENT Event;
   IO_STATUS_BLOCK Iosb;
   PFILE_OBJECT FileObject;
+  PEPROCESS CurrentProcess;
 
   DPRINT("EngDeviceIoControl() called\n");
 
   KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
 
-  /* Switch to process context in which hDevice is valid */
+  CurrentProcess = PsGetCurrentProcess();
-  KeAttachProcess(W32kDeviceProcess);
+  if (CurrentProcess != W32kDeviceProcess)
+    {  
+      /* Switch to process context in which hDevice is valid */
+      KeAttachProcess(W32kDeviceProcess);
+    }
 
   Status = ObReferenceObjectByHandle(hDevice,
 				     FILE_READ_DATA | FILE_WRITE_DATA,
@@ -64,7 +69,10 @@ EngDeviceIoControl(HANDLE  hDevice,
 				     KernelMode,
 				     (PVOID *)&FileObject,
 				     NULL);
-  KeDetachProcess();
+  if (CurrentProcess != W32kDeviceProcess)
+    {
+      KeDetachProcess();
+    }
 
   if (!NT_SUCCESS(Status))
     {

reactos/subsys/win32k/misc/driver.c

@@ -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: driver.c,v 1.26 2003/08/13 20:24:05 chorns Exp $
+/* $Id: driver.c,v 1.27 2003/08/18 10:18:14 hbirr Exp $
  * 
  * GDI Driver support routines
  * (mostly swiped from Wine)
@@ -244,9 +244,14 @@ HANDLE DRIVER_FindMPDriver(LPCWSTR  Name)
   IO_STATUS_BLOCK Iosb;
   HANDLE DisplayHandle;
   NTSTATUS Status;
+  PEPROCESS CurrentProcess;
 
-  /* Switch to process context in which handle is to be valid */
+  CurrentProcess = PsGetCurrentProcess();
-  KeAttachProcess(W32kDeviceProcess);
+  if (CurrentProcess != W32kDeviceProcess)
+    {
+      /* Switch to process context in which handle is to be valid */
+      KeAttachProcess(W32kDeviceProcess);
+    }
 
   RtlInitUnicodeStringFromLiteral(&DeviceName, L"\\??\\DISPLAY1");
   InitializeObjectAttributes(&ObjectAttributes,
@@ -261,7 +266,10 @@ HANDLE DRIVER_FindMPDriver(LPCWSTR  Name)
 		      0,
 		      FILE_SYNCHRONOUS_IO_ALERT);
 
-  KeDetachProcess();
+  if (CurrentProcess != W32kDeviceProcess)
+    {
+      KeDetachProcess();
+    }
 
   if (!NT_SUCCESS(Status))
     {

reactos/subsys/win32k/objects/dc.c

@@ -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: dc.c,v 1.70 2003/08/17 17:32:58 royce Exp $
+/* $Id: dc.c,v 1.71 2003/08/18 10:18:14 hbirr Exp $
  *
  * DC.C - Device context functions
  *
@@ -511,6 +511,7 @@ W32kDeleteDC(HDC  DCHandle)
   {
     if (!DRIVER_UnreferenceDriver (DCToDelete->DriverName))
     {
+      PEPROCESS CurrentProcess;
       DPRINT( "No more references to driver, reseting display\n" );
       DCToDelete->DriverFunctions.AssertMode( DCToDelete->PDev, FALSE );
       CHECKPOINT;
@@ -518,9 +519,16 @@ W32kDeleteDC(HDC  DCHandle)
       CHECKPOINT;
       DCToDelete->DriverFunctions.DisablePDev(DCToDelete->PDev);
 
-      KeAttachProcess(W32kDeviceProcess);
+      CurrentProcess = PsGetCurrentProcess();
+      if (CurrentProcess != W32kDeviceProcess)
+        {
+          KeAttachProcess(W32kDeviceProcess);
+	}
       ZwClose(PrimarySurface.DisplayDevice);
-      KeDetachProcess();
+      if (CurrentProcess != W32kDeviceProcess)
+        {
+          KeDetachProcess();
+	}
 
       PrimarySurfaceCreated = FALSE;
     }

reactos/subsys/win32k/objects/gdiobj.c

@@ -19,7 +19,7 @@
 /*
  * GDIOBJ.C - GDI object manipulation routines
  *
- * $Id: gdiobj.c,v 1.35 2003/08/17 17:32:58 royce Exp $
+ * $Id: gdiobj.c,v 1.36 2003/08/18 10:18:14 hbirr Exp $
  *
  */
 
@@ -534,9 +534,14 @@ CleanupForProcess (struct _EPROCESS *Process, INT Pid)
   DWORD i;
   PGDI_HANDLE_ENTRY handleEntry;
   PGDIOBJHDR objectHeader;
+  PEPROCESS CurrentProcess;
   //NTSTATUS Status;
 
-  KeAttachProcess(Process);
+  CurrentProcess = PsGetCurrentProcess();
+  if (CurrentProcess != Process)
+    {
+      KeAttachProcess(Process);
+    }
 
   for(i = 1; i < GDI_HANDLE_NUMBER; i++)
     {
@@ -550,7 +555,10 @@ CleanupForProcess (struct _EPROCESS *Process, INT Pid)
 	}
     }
 
-  KeDetachProcess();
+  if (CurrentProcess != Process)
+    {
+      KeDetachProcess();
+    }
 
   return TRUE;
 }