More cleanups of the include files

- centralizing to simplify the -I's required to compile

src/include/storage/sinval.h

@@ -0,0 +1,33 @@
+/*-------------------------------------------------------------------------
+ *
+ * sinval.h--
+ *    POSTGRES shared cache invalidation communication definitions.
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: sinval.h,v 1.1 1996/08/28 01:58:28 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef	SINVAL_H
+#define SINVAL_H
+
+#include "c.h"
+#include "storage/spin.h"
+#include "storage/ipc.h"
+#include "storage/itemptr.h"
+#include "storage/backendid.h"
+
+extern SPINLOCK SInvalLock;
+
+extern void CreateSharedInvalidationState(IPCKey key);
+extern void AttachSharedInvalidationState(IPCKey key);
+extern void InitSharedInvalidationState();
+extern void RegisterSharedInvalid(int cacheId, Index hashIndex,
+				  ItemPointer pointer);
+extern void InvalidateSharedInvalid(void (*invalFunction)(),
+				    void (*resetFunction)());
+
+
+#endif /* SINVAL_H */