2 * ReactOS W32 Subsystem
3 * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
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.
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.
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.
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
31 * 06-06-2001 CSH Created
34 /* INCLUDES ******************************************************************/
41 /* GLOBALS *******************************************************************/
43 static LONG NrGuiAppsRunning
= 0;
45 /* FUNCTIONS *****************************************************************/
48 co_AddGuiApp(PPROCESSINFO W32Data
)
50 W32Data
->W32PF_flags
|= W32PF_CREATEDWINORDC
;
51 if (InterlockedIncrement(&NrGuiAppsRunning
) == 1)
55 Initialized
= co_IntInitializeDesktopGraphics();
59 W32Data
->W32PF_flags
&= ~W32PF_CREATEDWINORDC
;
60 InterlockedDecrement(&NrGuiAppsRunning
);
68 RemoveGuiApp(PPROCESSINFO W32Data
)
70 W32Data
->W32PF_flags
&= ~W32PF_CREATEDWINORDC
;
71 if (InterlockedDecrement(&NrGuiAppsRunning
) == 0)
73 IntEndDesktopGraphics();
78 co_IntGraphicsCheck(BOOL Create
)
82 W32Data
= PsGetCurrentProcessWin32Process();
85 if (! (W32Data
->W32PF_flags
& W32PF_CREATEDWINORDC
) && ! (W32Data
->W32PF_flags
& W32PF_MANUALGUICHECK
))
87 return co_AddGuiApp(W32Data
);
92 if ((W32Data
->W32PF_flags
& W32PF_CREATEDWINORDC
) && ! (W32Data
->W32PF_flags
& W32PF_MANUALGUICHECK
))
94 RemoveGuiApp(W32Data
);
103 IntUserManualGuiCheck(LONG Check
)
105 PPROCESSINFO W32Data
;
107 DPRINT("Enter IntUserManualGuiCheck\n");
109 W32Data
= PsGetCurrentProcessWin32Process();
112 W32Data
->W32PF_flags
|= W32PF_MANUALGUICHECK
;
116 if (! (W32Data
->W32PF_flags
& W32PF_CREATEDWINORDC
))
118 co_AddGuiApp(W32Data
);
123 if (W32Data
->W32PF_flags
& W32PF_CREATEDWINORDC
)
125 RemoveGuiApp(W32Data
);
129 DPRINT("Leave IntUserManualGuiCheck\n");
134 InitGuiCheckImpl (VOID
)
136 return STATUS_SUCCESS
;