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127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/*
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* ReactOS W32 Subsystem
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: guicheck.c,v 1.12 2003/05/31 08:53:14 gvg Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* PURPOSE: GUI state check
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* FILE: subsys/win32k/ntuser/guicheck.c
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* PROGRAMER: Casper S. Hornstrup (chorns@users.sourceforge.net)
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* NOTES: The GuiCheck() function performs a few delayed operations:
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* 1) A GUI process is assigned a window station
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* 2) A message queue is created for a GUI thread before use
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* 3) The system window classes are registered for a process
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* REVISION HISTORY:
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* 06-06-2001 CSH Created
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*/
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/* INCLUDES ******************************************************************/
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#include <ddk/ntddk.h>
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#include <napi/teb.h>
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#include <win32k/win32k.h>
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#include <include/guicheck.h>
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#include <include/msgqueue.h>
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#include <include/object.h>
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#include <napi/win32.h>
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#include <include/winsta.h>
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#define NDEBUG
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#include <debug.h>
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/* GLOBALS *******************************************************************/
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static ULONG NrGuiApplicationsRunning = 0;
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/* FUNCTIONS *****************************************************************/
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VOID FASTCALL
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W32kGraphicsCheck(BOOL Create)
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{
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if (Create)
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{
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if (0 == NrGuiApplicationsRunning)
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{
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W32kInitializeDesktopGraphics();
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}
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NrGuiApplicationsRunning++;
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}
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else
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{
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if (0 < NrGuiApplicationsRunning)
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{
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NrGuiApplicationsRunning--;
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}
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if (0 == NrGuiApplicationsRunning)
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{
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W32kEndDesktopGraphics();
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}
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}
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}
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VOID FASTCALL
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W32kGuiCheck(VOID)
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{
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if (PsGetWin32Process() == NULL)
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{
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NTSTATUS Status;
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PsCreateWin32Process(PsGetCurrentProcess());
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InitializeListHead(&PsGetWin32Process()->ClassListHead);
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ExInitializeFastMutex(&PsGetWin32Process()->ClassListLock);
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Status =
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ValidateWindowStationHandle(PROCESS_WINDOW_STATION(),
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UserMode,
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GENERIC_ALL,
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&PsGetWin32Process()->WindowStation);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("W32K: Failed to reference a window station for "
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"process.\n");
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}
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}
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if (PsGetWin32Thread() == NULL)
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{
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NTSTATUS Status;
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PsCreateWin32Thread(PsGetCurrentThread());
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PsGetWin32Thread()->MessageQueue = MsqCreateMessageQueue();
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InitializeListHead(&PsGetWin32Thread()->WindowListHead);
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ExInitializeFastMutex(&PsGetWin32Thread()->WindowListLock);
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/* By default threads get assigned their process's desktop. */
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PsGetWin32Thread()->Desktop = NULL;
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Status = ObReferenceObjectByHandle(PsGetCurrentProcess()->Win32Desktop,
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GENERIC_ALL,
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ExDesktopObjectType,
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UserMode,
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(PVOID*)&PsGetWin32Thread()->Desktop,
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NULL);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("W32K: Failed to reference a desktop for thread.\n");
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}
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}
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}
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/* EOF */
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