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clogdesc.c File Reference

#include "postgres.h"
#include "access/clog.h"

Include dependency graph for clogdesc.c:

Go to the source code of this file.

Functions

void clog_desc (StringInfo buf, XLogReaderState *record)

const char * clog_identify (uint8 info)

Function Documentation

◆ clog_desc()

void clog_desc ( StringInfo buf,

XLogReaderState * record

)

Definition at line 21 of file clogdesc.c.

22{

23 char *rec = XLogRecGetData(record);

24 uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;

25

26 if (info == CLOG_ZEROPAGE)

27 {

28 int64 pageno;

29

30 memcpy(&pageno, rec, sizeof(pageno));

31 appendStringInfo(buf, "page %" PRId64, pageno);

32 }

33 else if (info == CLOG_TRUNCATE)

34 {

35 xl_clog_truncate xlrec;

36

37 memcpy(&xlrec, rec, sizeof(xl_clog_truncate));

38 appendStringInfo(buf, "page %" PRId64 "; oldestXact %u",

39 xlrec.pageno, xlrec.oldestXact);

40 }

41}

uint8

uint8_t uint8

Definition: c.h:536

int64

int64_t int64

Definition: c.h:535

CLOG_ZEROPAGE

#define CLOG_ZEROPAGE

Definition: clog.h:55

CLOG_TRUNCATE

#define CLOG_TRUNCATE

Definition: clog.h:56

buf

static char * buf

Definition: pg_test_fsync.c:72

appendStringInfo

void appendStringInfo(StringInfo str, const char *fmt,...)

Definition: stringinfo.c:145

xl_clog_truncate

Definition: clog.h:33

xl_clog_truncate::pageno

int64 pageno

Definition: clog.h:34

xl_clog_truncate::oldestXact

TransactionId oldestXact

Definition: clog.h:35

XLogRecGetInfo

#define XLogRecGetInfo(decoder)

Definition: xlogreader.h:410

XLogRecGetData

#define XLogRecGetData(decoder)

Definition: xlogreader.h:415

References appendStringInfo(), buf, CLOG_TRUNCATE, CLOG_ZEROPAGE, xl_clog_truncate::oldestXact, xl_clog_truncate::pageno, XLogRecGetData, and XLogRecGetInfo.

◆ clog_identify()

const char * clog_identify ( uint8 info )

Definition at line 44 of file clogdesc.c.

45{

46 const char *id = NULL;

47

48 switch (info & ~XLR_INFO_MASK)

49 {

50 case CLOG_ZEROPAGE:

51 id = "ZEROPAGE";

52 break;

53 case CLOG_TRUNCATE:

54 id = "TRUNCATE";

55 break;

56 }

57

58 return id;

59}

XLR_INFO_MASK

#define XLR_INFO_MASK

Definition: xlogrecord.h:62

References CLOG_TRUNCATE, CLOG_ZEROPAGE, and XLR_INFO_MASK.