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/*-------------------------------------------------------------------------
*
* pagenum.h--
* POSTGRES page number definitions.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: pagenum.h,v 1.1.1.1 1996/07/09 06:21:53 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PAGENUM_H
#define PAGENUM_H
#include "c.h"
#include "storage/page.h"
typedef uint16 PageNumber;
typedef uint32 LogicalPageNumber;
#define InvalidLogicalPageNumber 0
/*
* LogicalPageNumberIsValid --
* True iff the logical page number is valid.
*/
#define LogicalPageNumberIsValid(pageNumber) \
((bool)((pageNumber) != InvalidLogicalPageNumber))
#endif /* PAGENUM_H */
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