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/*-------------------------------------------------------------------------
*
* xid.c
* POSTGRES transaction identifier code.
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: xid.c,v 1.26 1999/07/17 20:16:45 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 "postgres.h"
#include "access/xact.h"
extern TransactionId NullTransactionId;
extern TransactionId DisabledTransactionId;
extern TransactionId AmiTransactionId;
extern TransactionId FirstTransactionId;
/* XXX name for catalogs */
TransactionId
xidin(char *representation)
{
return atol(representation);
}
/* XXX name for catalogs */
char *
xidout(TransactionId transactionId)
{
/* maximum 32 bit unsigned integer representation takes 10 chars */
char *representation = palloc(11);
snprintf(representation, 11, "%u", transactionId);
return representation;
}
/* ----------------------------------------------------------------
* xideq
* ----------------------------------------------------------------
*/
/*
* xideq - returns 1, iff xid1 == xid2
* 0 else;
*/
bool
xideq(TransactionId xid1, TransactionId xid2)
{
return (bool) (xid1 == xid2);
}
/* ----------------------------------------------------------------
* TransactionIdAdd
* ----------------------------------------------------------------
*/
void
TransactionIdAdd(TransactionId *xid, int value)
{
*xid += value;
return;
}
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