1 files changed, 102 insertions, 0 deletions
diff --git a/private/ntos/tdi/isn/fwd/driver.h b/private/ntos/tdi/isn/fwd/driver.h
new file mode 100644
index 000000000..ecc298345
--- /dev/null
+++ b/private/ntos/tdi/isn/fwd/driver.h
@@ -0,0 +1,102 @@
+/*++
+
+Copyright (c) 1995  Microsoft Corporation
+
+Module Name:
+
+    ntos\tdi\isn\fwd\driver.h
+
+Abstract:
+    IPX Forwarder driver dispatch routines
+
+
+Author:
+
+    Vadim Eydelman
+
+Revision History:
+
+--*/
+
+
+#ifndef _IPXFWD_DRIVER_
+#define _IPXFWD_DRIVER_
+
+// Pseudo constant 0xFFFFFFFFFFFFF
+extern const UCHAR BROADCAST_NODE[6];
+
+// Performance measurement:
+//	Enabling flag
+extern BOOLEAN			MeasuringPerformance;
+//	Access control
+extern KSPIN_LOCK		PerfCounterLock;
+//	Statistic accumulators (counters)
+extern FWD_PERFORMANCE	PerfBlock;
+
+// Access control for external callers (ipx stack, filter driver)
+//	Flag set upon completion of initialization of all components
+extern volatile BOOLEAN IpxFwdInitialized;
+//	Number of clients executing forwarder code (if -1, the forwarder
+//	is being stopped)
+extern LONG		ClientCount;
+//	Event to be signalled by the last client inside forwarder
+extern KEVENT	ClientsGoneEvent;
+
+ 
+/*++
+	E n t e r F o r w a r d e r
+
+Routine Description:
+	Checks if forwarder is initialized and grants access
+	to it (records the entrance as well
+
+Arguments:
+	None
+
+Return Value:
+	TRUE - access granted
+	FALSE - forwarder is not yet initialized or is being stopped
+
+--*/
+//BOOLEAN
+//EnterForwarder (
+//	void
+//	);
+#define EnterForwarder() (									\
+	(InterlockedIncrement(&ClientCount), IpxFwdInitialized) \
+			? TRUE											\
+			: (DoLeaveForwarder(), FALSE)						\
+	)
+
+/*++
+	L e a v e F o r w a r d e r
+
+Routine Description:
+	Records the fact that external client stopped using forwarder
+	
+Arguments:
+	None
+
+Return Value:
+	None
+
+--*/
+//BOOLEAN
+//EnterForwarder (
+//	void
+//	);
+#define LeaveForwarder()							\
+	((InterlockedDecrement(&ClientCount)<0)			\
+		? KeSetEvent (&ClientsGoneEvent,0,FALSE)	\
+		: 0											\
+	)
+
+// Same as above but implemented as a routine to be used in
+// the EnterForwarder macro above (this reduces code size
+// and aids in debugging by improving readability of disassembly
+BOOLEAN
+DoLeaveForwarder (
+	VOID
+	);
+
+#endif