subsystems/win32/win32k/ntuser/guicheck.c

   1 /*
   2  *  ReactOS W32 Subsystem
   3  *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License along
  16  *  with this program; if not, write to the Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19 /* $Id$
  20  *
  21  * COPYRIGHT:        See COPYING in the top level directory
  22  * PROJECT:          ReactOS kernel
  23  * PURPOSE:          GUI state check
  24  * FILE:             subsys/win32k/ntuser/guicheck.c
  25  * PROGRAMER:        Casper S. Hornstrup (chorns@users.sourceforge.net)
  26  * NOTES:            The GuiCheck() function performs a few delayed operations:
  27  *                   1) A GUI process is assigned a window station
  28  *                   2) A message queue is created for a GUI thread before use
  29  *                   3) The system window classes are registered for a process
  30  * REVISION HISTORY:
  31  *       06-06-2001  CSH  Created
  32  */
  33
  34 /* INCLUDES ******************************************************************/
  35
  36 #include <win32k.h>
  37
  38 #define NDEBUG
  39 #include <debug.h>
  40
  41 /* GLOBALS *******************************************************************/
  42
  43 static LONG NrGuiAppsRunning = 0;
  44
  45 /* FUNCTIONS *****************************************************************/
  46
  47 static BOOL FASTCALL
  48 co_AddGuiApp(PPROCESSINFO W32Data)
  49 {
  50    W32Data->W32PF_flags |= W32PF_CREATEDWINORDC;
  51    if (InterlockedIncrement(&NrGuiAppsRunning) == 1)
  52    {
  53       BOOL Initialized;
  54
  55       Initialized = co_IntInitializeDesktopGraphics();
  56
  57       if (!Initialized)
  58       {
  59          W32Data->W32PF_flags &= ~W32PF_CREATEDWINORDC;
  60          InterlockedDecrement(&NrGuiAppsRunning);
  61          return FALSE;
  62       }
  63    }
  64    return TRUE;
  65 }
  66
  67 static void FASTCALL
  68 RemoveGuiApp(PPROCESSINFO W32Data)
  69 {
  70    W32Data->W32PF_flags &= ~W32PF_CREATEDWINORDC;
  71    if (InterlockedDecrement(&NrGuiAppsRunning) == 0)
  72    {
  73       IntEndDesktopGraphics();
  74    }
  75 }
  76
  77 BOOL FASTCALL
  78 co_IntGraphicsCheck(BOOL Create)
  79 {
  80    PPROCESSINFO W32Data;
  81
  82    W32Data = PsGetCurrentProcessWin32Process();
  83    if (Create)
  84    {
  85       if (! (W32Data->W32PF_flags & W32PF_CREATEDWINORDC) && ! (W32Data->W32PF_flags & W32PF_MANUALGUICHECK))
  86       {
  87          return co_AddGuiApp(W32Data);
  88       }
  89    }
  90    else
  91    {
  92       if ((W32Data->W32PF_flags & W32PF_CREATEDWINORDC) && ! (W32Data->W32PF_flags & W32PF_MANUALGUICHECK))
  93       {
  94          RemoveGuiApp(W32Data);
  95       }
  96    }
  97
  98    return TRUE;
  99 }
 100
 101 VOID
 102 FASTCALL
 103 IntUserManualGuiCheck(LONG Check)
 104 {
 105    PPROCESSINFO W32Data;
 106
 107    DPRINT("Enter IntUserManualGuiCheck\n");
 108
 109    W32Data = PsGetCurrentProcessWin32Process();
 110    if (0 == Check)
 111    {
 112       W32Data->W32PF_flags |= W32PF_MANUALGUICHECK;
 113    }
 114    else if (0 < Check)
 115    {
 116       if (! (W32Data->W32PF_flags & W32PF_CREATEDWINORDC))
 117       {
 118          co_AddGuiApp(W32Data);
 119       }
 120    }
 121    else
 122    {
 123       if (W32Data->W32PF_flags & W32PF_CREATEDWINORDC)
 124       {
 125          RemoveGuiApp(W32Data);
 126       }
 127    }
 128
 129    DPRINT("Leave IntUserManualGuiCheck\n");
 130
 131 }
 132
 133 NTSTATUS FASTCALL
 134 InitGuiCheckImpl (VOID)
 135 {
 136    return STATUS_SUCCESS;
 137 }
 138
 139 /* EOF */