+/*
+ * ReactOS W32 Subsystem
+ * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/*
+ *
+ * COPYRIGHT: See COPYING in the top level directory
+ * PROJECT: ReactOS kernel
+ * PURPOSE: Windows++ locking
+ * FILE: subsys/win32k/ntuser/winlock.c
+ * PROGRAMER: Gunnar
+ * REVISION HISTORY:
+ *
+ */
+/* INCLUDES ******************************************************************/
+
+#include <ddk/ntddk.h>
+#include <win32k/win32k.h>
+#include <include/object.h>
+#include <include/guicheck.h>
+#include <include/window.h>
+#include <include/class.h>
+#include <include/error.h>
+#include <include/winsta.h>
+#include <include/winpos.h>
+#include <include/callback.h>
+#include <include/msgqueue.h>
+#include <include/rect.h>
+
+#define NDEBUG
+#include <win32k/debug1.h>
+#include <debug.h>
+
+/* GLOBALS *****************************************************************/
+
+static ERESOURCE WinLock;
+
+/* FUNCTIONS *****************************************************************/
+
+BOOL FASTCALL IntVerifyWinLock(WINLOCK_TYPE Type)
+{
+ switch (Type)
+ {
+ case None:
+ return !ExIsResourceAcquiredSharedLite(&WinLock);
+ case Shared: /* NOTE: an exclusive lock is also a shared lock */
+ case Any:
+ return ExIsResourceAcquiredSharedLite(&WinLock);
+ case Exclusive:
+ return ExIsResourceAcquiredExclusiveLite(&WinLock);
+ }
+
+ KEBUGCHECK(0);
+ return FALSE;
+}
+
+WINLOCK_TYPE FASTCALL IntSuspendWinLock()
+{
+ ASSERT_WINLOCK(Any);
+
+ if (ExIsResourceAcquiredExclusiveLite(&WinLock)) return Exclusive;
+
+ return Shared;
+}
+
+VOID FASTCALL IntRestoreWinLock(WINLOCK_TYPE Type)
+{
+ switch (Type)
+ {
+ case Exclusive:
+ return IntAcquireWinLockExclusive(&WinLock);
+ case Shared:
+ return IntAcquireWinLockShared(&WinLock);
+ /* silence warnings */
+ case None:
+ case Any:
+ break;
+ }
+
+ KEBUGCHECK(0);
+}
+
+inline VOID IntAcquireWinLockShared()
+{
+ ExAcquireResourceExclusiveLite(&WinLock, TRUE /*Wait*/ );
+}
+
+inline VOID IntAcquireWinLockExclusive()
+{
+ ExAcquireResourceSharedLite(&WinLock, TRUE /*Wait*/ );
+}
+
+inline VOID IntReleaseWinLock()
+{
+ ExReleaseResourceLite(&WinLock );
+}
+
+inline BOOL IntInitializeWinLock()
+{
+ ExInitializeResourceLite(&WinLock );
+ return TRUE;
+}
+
+inline VOID IntDeleteWinLock()
+{
+ ExDeleteResourceLite(&WinLock );
+}
+
+/* EOF */