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0a20207060
when an error occurs during xlog replay. Also, replace the former risky 'write into a fixed-size buffer with no overflow detection' API for XLOG record description routines; use an expansible StringInfo instead. (The latter accounts for most of the patch bulk.) Qingqing Zhou
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/*
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* clog.h
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*
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* PostgreSQL transaction-commit-log manager
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*
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* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/access/clog.h,v 1.17 2006/03/24 04:32:13 tgl Exp $
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*/
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#ifndef CLOG_H
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#define CLOG_H
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#include "access/xlog.h"
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/*
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* Possible transaction statuses --- note that all-zeroes is the initial
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* state.
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*
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* A "subcommitted" transaction is a committed subtransaction whose parent
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* hasn't committed or aborted yet.
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*/
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typedef int XidStatus;
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#define TRANSACTION_STATUS_IN_PROGRESS 0x00
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#define TRANSACTION_STATUS_COMMITTED 0x01
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#define TRANSACTION_STATUS_ABORTED 0x02
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#define TRANSACTION_STATUS_SUB_COMMITTED 0x03
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/* Number of SLRU buffers to use for clog */
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#define NUM_CLOG_BUFFERS 8
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extern void TransactionIdSetStatus(TransactionId xid, XidStatus status);
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extern XidStatus TransactionIdGetStatus(TransactionId xid);
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extern Size CLOGShmemSize(void);
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extern void CLOGShmemInit(void);
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extern void BootStrapCLOG(void);
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extern void StartupCLOG(void);
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extern void ShutdownCLOG(void);
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extern void CheckPointCLOG(void);
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extern void ExtendCLOG(TransactionId newestXact);
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extern void TruncateCLOG(TransactionId oldestXact);
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/* XLOG stuff */
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#define CLOG_ZEROPAGE 0x00
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extern void clog_redo(XLogRecPtr lsn, XLogRecord *record);
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extern void clog_desc(StringInfo buf, uint8 xl_info, char *rec);
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#endif /* CLOG_H */
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