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/*-------------------------------------------------------------------------
*
* xid.c--
* POSTGRES transaction identifier code.
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/Attic/xid.c,v 1.12 1998/02/26 04:30:19 momjian Exp $
*
* OLD COMMENTS
* XXX WARNING
* Much of this file will change when we change our representation
* of transaction ids -cim 3/23/90
*
* It is time to make the switch from 5 byte to 4 byte transaction ids
* This file was totally reworked. -mer 5/22/92
*
*-------------------------------------------------------------------------
*/
#include <stdio.h>
#include <postgres.h>
#include <access/xact.h>
extern TransactionId NullTransactionId;
extern TransactionId DisabledTransactionId;
extern TransactionId AmiTransactionId;
extern TransactionId FirstTransactionId;
/* XXX char16 name for catalogs */
TransactionId
xidin(char *representation)
{
return (atol(representation));
}
/* XXX char16 name for catalogs */
char *
xidout(TransactionId transactionId)
{
/* return(TransactionIdFormString(transactionId)); */
char *representation;
/* maximum 32 bit unsigned integer representation takes 10 chars */
representation = palloc(11);
sprintf(representation, "%u", transactionId);
return (representation);
}
/* ----------------------------------------------------------------
* TransactionIdEquals
* ----------------------------------------------------------------
*/
bool
TransactionIdEquals(TransactionId id1, TransactionId id2)
{
return ((bool) (id1 == id2));
}
/* ----------------------------------------------------------------
* TransactionIdIsLessThan
* ----------------------------------------------------------------
*/
bool
TransactionIdIsLessThan(TransactionId id1, TransactionId id2)
{
return ((bool) (id1 < id2));
}
/* ----------------------------------------------------------------
* xideq
* ----------------------------------------------------------------
*/
/*
* xideq - returns 1, iff xid1 == xid2
* 0 else;
*/
bool
xideq(TransactionId xid1, TransactionId xid2)
{
return ((bool) (xid1 == xid2));
}
/* ----------------------------------------------------------------
* TransactionIdIncrement
* ----------------------------------------------------------------
*/
#ifdef NOT_USED
void
TransactionIdIncrement(TransactionId *transactionId)
{
(*transactionId)++;
if (*transactionId == DisabledTransactionId)
elog(FATAL, "TransactionIdIncrement: exhausted XID's");
return;
}
#endif
/* ----------------------------------------------------------------
* TransactionIdAdd
* ----------------------------------------------------------------
*/
void
TransactionIdAdd(TransactionId *xid, int value)
{
*xid += value;
return;
}
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