1 files changed, 63 insertions, 0 deletions

diff --git a/private/ntos/inc/exlevels.h b/private/ntos/inc/exlevels.h
new file mode 100644
index 000000000..d46d70cae
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+++ b/private/ntos/inc/exlevels.h
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+/*++ BUILD Version: 0001    // Increment this if a change has global effects
+
+Copyright (c) 1989  Microsoft Corporation
+
+Module Name:
+
+    exlevels.h
+
+Abstract:
+
+    This file contains all of the MUTEX level numbers used by the NT
+    executive.  A thread is only allowed to acquire mutexes with levels
+    numerically higher than the highest mutex level already owned.
+
+Author:
+
+    Steve Wood (stevewo) 08-May-1989
+
+Revision History:
+
+--*/
+
+//
+// Kernel Mutex Level Numbers (must be globallly assigned within executive)
+// The third token in the name is the sub-component name that defines and
+// uses the level number.
+//
+
+//
+// Used by Vdm for protecting io simulation structures
+//
+
+#define MUTEX_LEVEL_VDM_IO                  (ULONG)0x00000001
+
+#define MUTEX_LEVEL_EX_PROFILE              (ULONG)0x00000040
+
+//
+// The LANMAN Redirector uses the file system major function, but defines
+// it's own mutex levels.  We can do this safely because we know that the
+// local filesystem will never call the remote filesystem and vice versa.
+//
+
+#define MUTEX_LEVEL_RDR_FILESYS_DATABASE    (ULONG)0x10100000
+#define MUTEX_LEVEL_RDR_FILESYS_SECURITY    (ULONG)0x10100001
+
+//
+// File System levels.
+//
+
+#define MUTEX_LEVEL_FILESYSTEM_RAW_VCB      (ULONG)0x11000006
+
+//
+// In the NT STREAMS environment, a mutex is used to serialize open, close
+// and Scheduler threads executing in a subsystem-parallelized stack.
+//
+
+#define MUTEX_LEVEL_STREAMS_SUBSYS          (ULONG)0x11001001
+
+//
+// Mutex level used by LDT support on x86
+//
+
+#define MUTEX_LEVEL_PS_LDT                  (ULONG)0x1F000000