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-rw-r--r--src/include/utils/pg_lsn.h29
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diff --git a/src/include/utils/pg_lsn.h b/src/include/utils/pg_lsn.h
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+/*-------------------------------------------------------------------------
+ *
+ * pg_lsn.h
+ * Declarations for operations on log sequence numbers (LSNs) of
+ * PostgreSQL.
+ *
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/utils/pg_lsn.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_LSN_H
+#define PG_LSN_H
+
+#include "access/xlogdefs.h"
+#include "fmgr.h"
+
+#define DatumGetLSN(X) ((XLogRecPtr) DatumGetInt64(X))
+#define LSNGetDatum(X) (Int64GetDatum((int64) (X)))
+
+#define PG_GETARG_LSN(n) DatumGetLSN(PG_GETARG_DATUM(n))
+#define PG_RETURN_LSN(x) return LSNGetDatum(x)
+
+extern XLogRecPtr pg_lsn_in_internal(const char *str, bool *have_error);
+
+#endif /* PG_LSN_H */