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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) 1996-2023, 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);
43 
44 extern int GetMaxSnapshotXidCount(void);
45 extern int GetMaxSnapshotSubxidCount(void);
46 
47 extern Snapshot GetSnapshotData(Snapshot snapshot);
48 
50  VirtualTransactionId *sourcevxid);
51 extern bool ProcArrayInstallRestoredXmin(TransactionId xmin, PGPROC *proc);
52 
54 
56 extern bool TransactionIdIsActive(TransactionId xid);
60 extern TransactionId GetOldestSafeDecodingTransactionId(bool catalogOnly);
61 extern void GetReplicationHorizons(TransactionId *xmin, TransactionId *catalog_xmin);
62 
63 extern VirtualTransactionId *GetVirtualXIDsDelayingChkpt(int *nvxids, int type);
65  int nvxids, int type);
66 
67 extern PGPROC *BackendPidGetProc(int pid);
68 extern PGPROC *BackendPidGetProcWithLock(int pid);
69 extern int BackendXidGetPid(TransactionId xid);
70 extern bool IsBackendPid(int pid);
71 
73  bool excludeXmin0, bool allDbs, int excludeVacuum,
74  int *nvxids);
78  bool conflictPending);
79 
80 extern bool MinimumActiveBackends(int min);
81 extern int CountDBBackends(Oid databaseid);
82 extern int CountDBConnections(Oid databaseid);
83 extern void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending);
84 extern int CountUserBackends(Oid roleid);
85 extern bool CountOtherDBBackends(Oid databaseId,
86  int *nbackends, int *nprepared);
87 extern void TerminateOtherDBBackends(Oid databaseId);
88 
90  int nxids, const TransactionId *xids,
91  TransactionId latestXid);
92 
94  TransactionId catalog_xmin, bool already_locked);
95 
97  TransactionId *catalog_xmin);
98 
99 #endif /* PROCARRAY_H */
uint32 TransactionId
Definition: c.h:636
size_t Size
Definition: c.h:589
unsigned int Oid
Definition: postgres_ext.h:31
TransactionId GetOldestNonRemovableTransactionId(Relation rel)
Definition: procarray.c:2013
VirtualTransactionId * GetVirtualXIDsDelayingChkpt(int *nvxids, int type)
Definition: procarray.c:3067
void ProcArrayGetReplicationSlotXmin(TransactionId *xmin, TransactionId *catalog_xmin)
Definition: procarray.c:3927
pid_t SignalVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode, bool conflictPending)
Definition: procarray.c:3463
Size ProcArrayShmemSize(void)
Definition: procarray.c:379
TransactionId GetOldestSafeDecodingTransactionId(bool catalogOnly)
Definition: procarray.c:2969
void XidCacheRemoveRunningXids(TransactionId xid, int nxids, const TransactionId *xids, TransactionId latestXid)
Definition: procarray.c:3950
bool TransactionIdIsActive(TransactionId xid)
Definition: procarray.c:1618
bool MinimumActiveBackends(int min)
Definition: procarray.c:3512
void TerminateOtherDBBackends(Oid databaseId)
Definition: procarray.c:3794
void ExpireAllKnownAssignedTransactionIds(void)
Definition: procarray.c:4487
VirtualTransactionId * GetConflictingVirtualXIDs(TransactionId limitXmin, Oid dbOid)
Definition: procarray.c:3383
RunningTransactions GetRunningTransactionData(void)
Definition: procarray.c:2729
TransactionId GetOldestActiveTransactionId(void)
Definition: procarray.c:2904
void ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid)
Definition: procarray.c:670
void RecordKnownAssignedTransactionIds(TransactionId xid)
Definition: procarray.c:4392
TransactionId GetOldestTransactionIdConsideredRunning(void)
Definition: procarray.c:2042
int GetMaxSnapshotSubxidCount(void)
Definition: procarray.c:2088
int CountDBConnections(Oid databaseid)
Definition: procarray.c:3595
void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending)
Definition: procarray.c:3626
void GetReplicationHorizons(TransactionId *xmin, TransactionId *catalog_xmin)
Definition: procarray.c:2055
void ProcArrayAdd(PGPROC *proc)
Definition: procarray.c:472
pid_t CancelVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode)
Definition: procarray.c:3457
Snapshot GetSnapshotData(Snapshot snapshot)
Definition: procarray.c:2214
bool HaveVirtualXIDsDelayingChkpt(VirtualTransactionId *vxids, int nvxids, int type)
Definition: procarray.c:3113
void KnownAssignedTransactionIdsIdleMaintenance(void)
Definition: procarray.c:4529
int GetMaxSnapshotXidCount(void)
Definition: procarray.c:2077
int CountDBBackends(Oid databaseid)
Definition: procarray.c:3565
bool ProcArrayInstallRestoredXmin(TransactionId xmin, PGPROC *proc)
Definition: procarray.c:2656
void CreateSharedProcArray(void)
Definition: procarray.c:421
void ProcArrayApplyRecoveryInfo(RunningTransactions running)
Definition: procarray.c:1056
void ProcArrayClearTransaction(PGPROC *proc)
Definition: procarray.c:909
VirtualTransactionId * GetCurrentVirtualXIDs(TransactionId limitXmin, bool excludeXmin0, bool allDbs, int excludeVacuum, int *nvxids)
Definition: procarray.c:3290
int CountUserBackends(Oid roleid)
Definition: procarray.c:3666
PGPROC * BackendPidGetProc(int pid)
Definition: procarray.c:3162
PGPROC * BackendPidGetProcWithLock(int pid)
Definition: procarray.c:3185
void ProcArrayApplyXidAssignment(TransactionId topxid, int nsubxids, TransactionId *subxids)
Definition: procarray.c:1302
bool CountOtherDBBackends(Oid databaseId, int *nbackends, int *nprepared)
Definition: procarray.c:3716
int BackendXidGetPid(TransactionId xid)
Definition: procarray.c:3222
bool IsBackendPid(int pid)
Definition: procarray.c:3257
void ProcArraySetReplicationSlotXmin(TransactionId xmin, TransactionId catalog_xmin, bool already_locked)
Definition: procarray.c:3902
void ProcArrayInitRecovery(TransactionId initializedUptoXID)
Definition: procarray.c:1025
void ProcArrayRemove(PGPROC *proc, TransactionId latestXid)
Definition: procarray.c:568
void ExpireTreeKnownAssignedTransactionIds(TransactionId xid, int nsubxids, TransactionId *subxids, TransactionId max_xid)
Definition: procarray.c:4461
bool ProcArrayInstallImportedXmin(TransactionId xmin, VirtualTransactionId *sourcevxid)
Definition: procarray.c:2577
bool TransactionIdIsInProgress(TransactionId xid)
Definition: procarray.c:1386
void ExpireOldKnownAssignedTransactionIds(TransactionId xid)
Definition: procarray.c:4507
ProcSignalReason
Definition: procsignal.h:31
Definition: proc.h:162