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
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*-------------------------------------------------------------------------
*
* procarray.h
* POSTGRES process array definitions.
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/storage/procarray.h
*
*-------------------------------------------------------------------------
*/
#ifndef PROCARRAY_H
#define PROCARRAY_H
#include "storage/lock.h"
#include "storage/standby.h"
#include "utils/relcache.h"
#include "utils/snapshot.h"
/*
* These are to implement PROCARRAY_FLAGS_XXX
*
* Note: These flags are cloned from PROC_XXX flags in src/include/storage/proc.h
* to avoid forcing to include proc.h when including procarray.h. So if you modify
* PROC_XXX flags, you need to modify these flags.
*/
#define PROCARRAY_VACUUM_FLAG 0x02 /* currently running lazy
* vacuum */
#define PROCARRAY_ANALYZE_FLAG 0x04 /* currently running
* analyze */
#define PROCARRAY_LOGICAL_DECODING_FLAG 0x10 /* currently doing logical
* decoding outside xact */
#define PROCARRAY_SLOTS_XMIN 0x20 /* replication slot xmin,
* catalog_xmin */
/*
* Only flags in PROCARRAY_PROC_FLAGS_MASK are considered when matching
* PGXACT->vacuumFlags. Other flags are used for different purposes and
* have no corresponding PROC flag equivalent.
*/
#define PROCARRAY_PROC_FLAGS_MASK (PROCARRAY_VACUUM_FLAG | \
PROCARRAY_ANALYZE_FLAG | \
PROCARRAY_LOGICAL_DECODING_FLAG)
/* Use the following flags as an input "flags" to GetOldestXmin function */
/* Consider all backends except for logical decoding ones which manage xmin separately */
#define PROCARRAY_FLAGS_DEFAULT PROCARRAY_LOGICAL_DECODING_FLAG
/* Ignore vacuum backends */
#define PROCARRAY_FLAGS_VACUUM PROCARRAY_FLAGS_DEFAULT | PROCARRAY_VACUUM_FLAG
/* Ignore analyze backends */
#define PROCARRAY_FLAGS_ANALYZE PROCARRAY_FLAGS_DEFAULT | PROCARRAY_ANALYZE_FLAG
/* Ignore both vacuum and analyze backends */
#define PROCARRAY_FLAGS_VACUUM_ANALYZE PROCARRAY_FLAGS_DEFAULT | PROCARRAY_VACUUM_FLAG | PROCARRAY_ANALYZE_FLAG
extern Size ProcArrayShmemSize(void);
extern void CreateSharedProcArray(void);
extern void ProcArrayAdd(PGPROC *proc);
extern void ProcArrayRemove(PGPROC *proc, TransactionId latestXid);
extern void ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid);
extern void ProcArrayClearTransaction(PGPROC *proc);
extern void ProcArrayInitRecovery(TransactionId initializedUptoXID);
extern void ProcArrayApplyRecoveryInfo(RunningTransactions running);
extern void ProcArrayApplyXidAssignment(TransactionId topxid,
int nsubxids, TransactionId *subxids);
extern void RecordKnownAssignedTransactionIds(TransactionId xid);
extern void ExpireTreeKnownAssignedTransactionIds(TransactionId xid,
int nsubxids, TransactionId *subxids,
TransactionId max_xid);
extern void ExpireAllKnownAssignedTransactionIds(void);
extern void ExpireOldKnownAssignedTransactionIds(TransactionId xid);
extern int GetMaxSnapshotXidCount(void);
extern int GetMaxSnapshotSubxidCount(void);
extern Snapshot GetSnapshotData(Snapshot snapshot);
extern bool ProcArrayInstallImportedXmin(TransactionId xmin,
VirtualTransactionId *sourcevxid);
extern bool ProcArrayInstallRestoredXmin(TransactionId xmin, PGPROC *proc);
extern RunningTransactions GetRunningTransactionData(void);
extern bool TransactionIdIsInProgress(TransactionId xid);
extern bool TransactionIdIsActive(TransactionId xid);
extern TransactionId GetOldestXmin(Relation rel, int flags);
extern TransactionId GetOldestActiveTransactionId(void);
extern TransactionId GetOldestSafeDecodingTransactionId(bool catalogOnly);
extern VirtualTransactionId *GetVirtualXIDsDelayingChkpt(int *nvxids, int type);
extern bool HaveVirtualXIDsDelayingChkpt(VirtualTransactionId *vxids,
int nvxids, int type);
extern PGPROC *BackendPidGetProc(int pid);
extern PGPROC *BackendPidGetProcWithLock(int pid);
extern int BackendXidGetPid(TransactionId xid);
extern bool IsBackendPid(int pid);
extern VirtualTransactionId *GetCurrentVirtualXIDs(TransactionId limitXmin,
bool excludeXmin0, bool allDbs, int excludeVacuum,
int *nvxids);
extern VirtualTransactionId *GetConflictingVirtualXIDs(TransactionId limitXmin, Oid dbOid);
extern pid_t CancelVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode);
extern pid_t SignalVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode,
bool conflictPending);
extern bool MinimumActiveBackends(int min);
extern int CountDBBackends(Oid databaseid);
extern int CountDBConnections(Oid databaseid);
extern void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending);
extern int CountUserBackends(Oid roleid);
extern bool CountOtherDBBackends(Oid databaseId,
int *nbackends, int *nprepared);
extern void XidCacheRemoveRunningXids(TransactionId xid,
int nxids, const TransactionId *xids,
TransactionId latestXid);
extern void ProcArraySetReplicationSlotXmin(TransactionId xmin,
TransactionId catalog_xmin, bool already_locked);
extern void ProcArrayGetReplicationSlotXmin(TransactionId *xmin,
TransactionId *catalog_xmin);
#endif /* PROCARRAY_H */
|
