blob: 609d06edeeb5418b81f76b29f41a08980e4d3057 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
/*-------------------------------------------------------------------------
*
* standbydef.h
* Frontend exposed definitions for hot standby mode.
*
*
* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/storage/standbydefs.h
*
*-------------------------------------------------------------------------
*/
#ifndef STANDBYDEFS_H
#define STANDBYDEFS_H
#include "access/xlogreader.h"
#include "lib/stringinfo.h"
#include "storage/lockdefs.h"
/* Recovery handlers for the Standby Rmgr (RM_STANDBY_ID) */
extern void standby_redo(XLogReaderState *record);
extern void standby_desc(StringInfo buf, XLogReaderState *record);
extern const char *standby_identify(uint8 info);
/*
* XLOG message types
*/
#define XLOG_STANDBY_LOCK 0x00
#define XLOG_RUNNING_XACTS 0x10
typedef struct xl_standby_locks
{
int nlocks; /* number of entries in locks array */
xl_standby_lock locks[FLEXIBLE_ARRAY_MEMBER];
} xl_standby_locks;
/*
* When we write running xact data to WAL, we use this structure.
*/
typedef struct xl_running_xacts
{
int xcnt; /* # of xact ids in xids[] */
int subxcnt; /* # of subxact ids in xids[] */
bool subxid_overflow; /* snapshot overflowed, subxids missing */
TransactionId nextXid; /* copy of ShmemVariableCache->nextXid */
TransactionId oldestRunningXid; /* *not* oldestXmin */
TransactionId latestCompletedXid; /* so we can set xmax */
TransactionId xids[FLEXIBLE_ARRAY_MEMBER];
} xl_running_xacts;
#endif /* STANDBYDEFS_H */
|
