SSL commit_ts.h

/*
 * commit_ts.h
 *
 * PostgreSQL commit timestamp manager
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/access/commit_ts.h
 */
#ifndef COMMIT_TS_H
#define COMMIT_TS_H

#include "access/xlog.h"
#include "datatype/timestamp.h"
#include "replication/origin.h"
#include "storage/sync.h"


extern PGDLLIMPORT bool track_commit_timestamp;

extern void TransactionTreeSetCommitTsData(TransactionId xid, int nsubxids,
             TransactionId *subxids, TimestampTz timestamp,
             RepOriginId nodeid);
extern bool TransactionIdGetCommitTsData(TransactionId xid,
           TimestampTz *ts, RepOriginId *nodeid);
extern TransactionId GetLatestCommitTsData(TimestampTz *ts,
             RepOriginId *nodeid);

extern Size CommitTsShmemSize(void);
extern void CommitTsShmemInit(void);
extern void BootStrapCommitTs(void);
extern void StartupCommitTs(void);
extern void CommitTsParameterChange(bool newvalue, bool oldvalue);
extern void CompleteCommitTsInitialization(void);
extern void CheckPointCommitTs(void);
extern void ExtendCommitTs(TransactionId newestXact);
extern void TruncateCommitTs(TransactionId oldestXact);
extern void SetCommitTsLimit(TransactionId oldestXact,
        TransactionId newestXact);
extern void AdvanceOldestCommitTsXid(TransactionId oldestXact);

extern int committssyncfiletag(const FileTag *ftag, char *path);

/* XLOG stuff */
#define COMMIT_TS_ZEROPAGE  0x00
#define COMMIT_TS_TRUNCATE  0x10

typedef struct xl_commit_ts_set
{
 TimestampTz timestamp;
 RepOriginId nodeid;
 TransactionId mainxid;
 /* subxact Xids follow */
}   xl_commit_ts_set;

#define SizeOfCommitTsSet (offsetof(xl_commit_ts_set, mainxid) + \
        sizeof(TransactionId))

typedef struct xl_commit_ts_truncate
{
 int64  pageno;
 TransactionId oldestXid;
} xl_commit_ts_truncate;

#define SizeOfCommitTsTruncate (offsetof(xl_commit_ts_truncate, oldestXid) + \
         sizeof(TransactionId))

extern void commit_ts_redo(XLogReaderState *record);
extern void commit_ts_desc(StringInfo buf, XLogReaderState *record);
extern const char *commit_ts_identify(uint8 info);

#endif       /* COMMIT_TS_H */