pg_lsn.h

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/*-------------------------------------------------------------------------
 *
 * pg_lsn.h
 *      Declarations for operations on log sequence numbers (LSNs) of
 *      PostgreSQL.
 *
 *
 * Portions Copyright (c) 1996-2017, 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 "fmgr.h"
#include "access/xlogdefs.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)

#endif   /* PG_LSN_H */