WAL utils defs

src/include/access/xlogutils.h

+
+#ifndef XLOG_UTILS_H
+
+#include "utils/rel.h"
+
+extern int XLogIsOwnerOfTuple(RelFileNode hnode, ItemPointer iptr, 
+					TransactionId xid, CommandId cid);
+extern bool XLogIsValidTuple(RelFileNode hnode, ItemPointer iptr);
+
+extern void XLogOpenLogRelation(void);
+
+extern Buffer XLogReadBuffer(bool extend, Relation reln, BlockNumber blkno);
+extern void XLogCloseRelationCache(void);
+extern Relation XLogOpenRelation(bool redo, RmgrId rmid, RelFileNode rnode);
+
+#endif