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procarray.h
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1 /*-------------------------------------------------------------------------
2  *
3  * procarray.h
4  * POSTGRES process array definitions.
5  *
6  *
7  * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
8  * Portions Copyright (c) 1994, Regents of the University of California
9  *
10  * src/include/storage/procarray.h
11  *
12  *-------------------------------------------------------------------------
13  */
14 #ifndef PROCARRAY_H
15 #define PROCARRAY_H
16 
17 #include "storage/lock.h"
18 #include "storage/standby.h"
19 #include "utils/relcache.h"
20 #include "utils/snapshot.h"
21 
22 
23 extern Size ProcArrayShmemSize(void);
24 extern void CreateSharedProcArray(void);
25 extern void ProcArrayAdd(PGPROC *proc);
26 extern void ProcArrayRemove(PGPROC *proc, TransactionId latestXid);
27 
28 extern void ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid);
29 extern void ProcArrayClearTransaction(PGPROC *proc);
30 
31 extern void ProcArrayInitRecovery(TransactionId initializedUptoXID);
34  int nsubxids, TransactionId *subxids);
35 
38  int nsubxids, TransactionId *subxids,
39  TransactionId max_xid);
40 extern void ExpireAllKnownAssignedTransactionIds(void);
42 
43 extern int GetMaxSnapshotXidCount(void);
44 extern int GetMaxSnapshotSubxidCount(void);
45 
46 extern Snapshot GetSnapshotData(Snapshot snapshot);
47 
49  VirtualTransactionId *sourcevxid);
50 extern bool ProcArrayInstallRestoredXmin(TransactionId xmin, PGPROC *proc);
51 
53 
55 extern bool TransactionIdIsActive(TransactionId xid);
59 extern TransactionId GetOldestSafeDecodingTransactionId(bool catalogOnly);
60 extern void GetReplicationHorizons(TransactionId *slot_xmin, TransactionId *catalog_xmin);
61 
63 extern bool HaveVirtualXIDsDelayingChkpt(VirtualTransactionId *vxids, int nvxids);
64 
65 extern PGPROC *BackendPidGetProc(int pid);
66 extern PGPROC *BackendPidGetProcWithLock(int pid);
67 extern int BackendXidGetPid(TransactionId xid);
68 extern bool IsBackendPid(int pid);
69 
71  bool excludeXmin0, bool allDbs, int excludeVacuum,
72  int *nvxids);
75 
76 extern bool MinimumActiveBackends(int min);
77 extern int CountDBBackends(Oid databaseid);
78 extern int CountDBConnections(Oid databaseid);
79 extern void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending);
80 extern int CountUserBackends(Oid roleid);
81 extern bool CountOtherDBBackends(Oid databaseId,
82  int *nbackends, int *nprepared);
83 extern void TerminateOtherDBBackends(Oid databaseId);
84 
86  int nxids, const TransactionId *xids,
87  TransactionId latestXid);
88 
90  TransactionId catalog_xmin, bool already_locked);
91 
93  TransactionId *catalog_xmin);
94 
95 #endif /* PROCARRAY_H */
TransactionId GetOldestTransactionIdConsideredRunning(void)
Definition: procarray.c:1892
bool TransactionIdIsActive(TransactionId xid)
Definition: procarray.c:1537
void ProcArrayInitRecovery(TransactionId initializedUptoXID)
Definition: procarray.c:954
bool IsBackendPid(int pid)
Definition: procarray.c:3075
uint32 TransactionId
Definition: c.h:520
void ProcArraySetReplicationSlotXmin(TransactionId xmin, TransactionId catalog_xmin, bool already_locked)
Definition: procarray.c:3708
PGPROC * BackendPidGetProcWithLock(int pid)
Definition: procarray.c:3003
void CreateSharedProcArray(void)
Definition: procarray.c:383
bool ProcArrayInstallRestoredXmin(TransactionId xmin, PGPROC *proc)
Definition: procarray.c:2491
Size ProcArrayShmemSize(void)
Definition: procarray.c:341
int BackendXidGetPid(TransactionId xid)
Definition: procarray.c:3040
int CountUserBackends(Oid roleid)
Definition: procarray.c:3472
VirtualTransactionId * GetCurrentVirtualXIDs(TransactionId limitXmin, bool excludeXmin0, bool allDbs, int excludeVacuum, int *nvxids)
Definition: procarray.c:3108
unsigned int Oid
Definition: postgres_ext.h:31
int GetMaxSnapshotXidCount(void)
Definition: procarray.c:1927
void ExpireOldKnownAssignedTransactionIds(TransactionId xid)
Definition: procarray.c:4303
int GetMaxSnapshotSubxidCount(void)
Definition: procarray.c:1938
RunningTransactions GetRunningTransactionData(void)
Definition: procarray.c:2554
bool HaveVirtualXIDsDelayingChkpt(VirtualTransactionId *vxids, int nvxids)
Definition: procarray.c:2934
bool ProcArrayInstallImportedXmin(TransactionId xmin, VirtualTransactionId *sourcevxid)
Definition: procarray.c:2416
Snapshot GetSnapshotData(Snapshot snapshot)
Definition: procarray.c:2064
void ProcArrayAdd(PGPROC *proc)
Definition: procarray.c:434
pid_t CancelVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode)
Definition: procarray.c:3270
TransactionId GetOldestSafeDecodingTransactionId(bool catalogOnly)
Definition: procarray.c:2794
TransactionId GetOldestActiveTransactionId(void)
Definition: procarray.c:2729
void ProcArrayApplyXidAssignment(TransactionId topxid, int nsubxids, TransactionId *subxids)
Definition: procarray.c:1221
void TerminateOtherDBBackends(Oid databaseId)
Definition: procarray.c:3600
bool CountOtherDBBackends(Oid databaseId, int *nbackends, int *nprepared)
Definition: procarray.c:3522
PGPROC * BackendPidGetProc(int pid)
Definition: procarray.c:2980
void ProcArrayApplyRecoveryInfo(RunningTransactions running)
Definition: procarray.c:985
int CountDBConnections(Oid databaseid)
Definition: procarray.c:3401
void XidCacheRemoveRunningXids(TransactionId xid, int nxids, const TransactionId *xids, TransactionId latestXid)
Definition: procarray.c:3753
void ProcArrayRemove(PGPROC *proc, TransactionId latestXid)
Definition: procarray.c:514
void ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid)
Definition: procarray.c:609
void RecordKnownAssignedTransactionIds(TransactionId xid)
Definition: procarray.c:4197
size_t Size
Definition: c.h:473
bool MinimumActiveBackends(int min)
Definition: procarray.c:3318
VirtualTransactionId * GetVirtualXIDsDelayingChkpt(int *nvxids)
Definition: procarray.c:2890
TransactionId GetOldestNonRemovableTransactionId(Relation rel)
Definition: procarray.c:1870
void ProcArrayClearTransaction(PGPROC *proc)
Definition: procarray.c:838
int CountDBBackends(Oid databaseid)
Definition: procarray.c:3371
void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending)
Definition: procarray.c:3432
void ExpireTreeKnownAssignedTransactionIds(TransactionId xid, int nsubxids, TransactionId *subxids, TransactionId max_xid)
Definition: procarray.c:4268
ProcSignalReason
Definition: procsignal.h:30
void ProcArrayGetReplicationSlotXmin(TransactionId *xmin, TransactionId *catalog_xmin)
Definition: procarray.c:3730
void GetReplicationHorizons(TransactionId *slot_xmin, TransactionId *catalog_xmin)
Definition: procarray.c:1905
void ExpireAllKnownAssignedTransactionIds(void)
Definition: procarray.c:4291
bool TransactionIdIsInProgress(TransactionId xid)
Definition: procarray.c:1305
Definition: proc.h:112
VirtualTransactionId * GetConflictingVirtualXIDs(TransactionId limitXmin, Oid dbOid)
Definition: procarray.c:3196