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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) 1996-2021, 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);
76  bool conflictPending);
77 
78 extern bool MinimumActiveBackends(int min);
79 extern int CountDBBackends(Oid databaseid);
80 extern int CountDBConnections(Oid databaseid);
81 extern void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending);
82 extern int CountUserBackends(Oid roleid);
83 extern bool CountOtherDBBackends(Oid databaseId,
84  int *nbackends, int *nprepared);
85 extern void TerminateOtherDBBackends(Oid databaseId);
86 
88  int nxids, const TransactionId *xids,
89  TransactionId latestXid);
90 
92  TransactionId catalog_xmin, bool already_locked);
93 
95  TransactionId *catalog_xmin);
96 
97 #endif /* PROCARRAY_H */
TransactionId GetOldestTransactionIdConsideredRunning(void)
Definition: procarray.c:2034
bool TransactionIdIsActive(TransactionId xid)
Definition: procarray.c:1591
void ProcArrayInitRecovery(TransactionId initializedUptoXID)
Definition: procarray.c:1003
bool IsBackendPid(int pid)
Definition: procarray.c:3228
uint32 TransactionId
Definition: c.h:587
void ProcArraySetReplicationSlotXmin(TransactionId xmin, TransactionId catalog_xmin, bool already_locked)
Definition: procarray.c:3868
PGPROC * BackendPidGetProcWithLock(int pid)
Definition: procarray.c:3156
void CreateSharedProcArray(void)
Definition: procarray.c:405
bool ProcArrayInstallRestoredXmin(TransactionId xmin, PGPROC *proc)
Definition: procarray.c:2644
Size ProcArrayShmemSize(void)
Definition: procarray.c:363
int BackendXidGetPid(TransactionId xid)
Definition: procarray.c:3193
int CountUserBackends(Oid roleid)
Definition: procarray.c:3632
VirtualTransactionId * GetCurrentVirtualXIDs(TransactionId limitXmin, bool excludeXmin0, bool allDbs, int excludeVacuum, int *nvxids)
Definition: procarray.c:3261
unsigned int Oid
Definition: postgres_ext.h:31
int GetMaxSnapshotXidCount(void)
Definition: procarray.c:2069
void ExpireOldKnownAssignedTransactionIds(TransactionId xid)
Definition: procarray.c:4462
int GetMaxSnapshotSubxidCount(void)
Definition: procarray.c:2080
RunningTransactions GetRunningTransactionData(void)
Definition: procarray.c:2707
bool HaveVirtualXIDsDelayingChkpt(VirtualTransactionId *vxids, int nvxids)
Definition: procarray.c:3087
bool ProcArrayInstallImportedXmin(TransactionId xmin, VirtualTransactionId *sourcevxid)
Definition: procarray.c:2569
Snapshot GetSnapshotData(Snapshot snapshot)
Definition: procarray.c:2206
void ProcArrayAdd(PGPROC *proc)
Definition: procarray.c:456
pid_t CancelVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode)
Definition: procarray.c:3423
TransactionId GetOldestSafeDecodingTransactionId(bool catalogOnly)
Definition: procarray.c:2947
TransactionId GetOldestActiveTransactionId(void)
Definition: procarray.c:2882
void ProcArrayApplyXidAssignment(TransactionId topxid, int nsubxids, TransactionId *subxids)
Definition: procarray.c:1275
void TerminateOtherDBBackends(Oid databaseId)
Definition: procarray.c:3760
bool CountOtherDBBackends(Oid databaseId, int *nbackends, int *nprepared)
Definition: procarray.c:3682
PGPROC * BackendPidGetProc(int pid)
Definition: procarray.c:3133
void ProcArrayApplyRecoveryInfo(RunningTransactions running)
Definition: procarray.c:1034
int CountDBConnections(Oid databaseid)
Definition: procarray.c:3561
void XidCacheRemoveRunningXids(TransactionId xid, int nxids, const TransactionId *xids, TransactionId latestXid)
Definition: procarray.c:3913
void ProcArrayRemove(PGPROC *proc, TransactionId latestXid)
Definition: procarray.c:552
void ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid)
Definition: procarray.c:654
void RecordKnownAssignedTransactionIds(TransactionId xid)
Definition: procarray.c:4355
size_t Size
Definition: c.h:540
bool MinimumActiveBackends(int min)
Definition: procarray.c:3478
VirtualTransactionId * GetVirtualXIDsDelayingChkpt(int *nvxids)
Definition: procarray.c:3043
TransactionId GetOldestNonRemovableTransactionId(Relation rel)
Definition: procarray.c:2005
void ProcArrayClearTransaction(PGPROC *proc)
Definition: procarray.c:887
int CountDBBackends(Oid databaseid)
Definition: procarray.c:3531
void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending)
Definition: procarray.c:3592
void ExpireTreeKnownAssignedTransactionIds(TransactionId xid, int nsubxids, TransactionId *subxids, TransactionId max_xid)
Definition: procarray.c:4424
ProcSignalReason
Definition: procsignal.h:30
void ProcArrayGetReplicationSlotXmin(TransactionId *xmin, TransactionId *catalog_xmin)
Definition: procarray.c:3890
void GetReplicationHorizons(TransactionId *slot_xmin, TransactionId *catalog_xmin)
Definition: procarray.c:2047
void ExpireAllKnownAssignedTransactionIds(void)
Definition: procarray.c:4450
bool TransactionIdIsInProgress(TransactionId xid)
Definition: procarray.c:1359
Definition: proc.h:121
VirtualTransactionId * GetConflictingVirtualXIDs(TransactionId limitXmin, Oid dbOid)
Definition: procarray.c:3349
pid_t SignalVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode, bool conflictPending)
Definition: procarray.c:3429