129 lines
5.2 KiB
C
129 lines
5.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* procarray.h
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* POSTGRES process array definitions.
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*
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*
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* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/storage/procarray.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PROCARRAY_H
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#define PROCARRAY_H
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#include "storage/lock.h"
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#include "storage/standby.h"
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#include "utils/relcache.h"
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#include "utils/snapshot.h"
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/*
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* These are to implement PROCARRAY_FLAGS_XXX
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*
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* Note: These flags are cloned from PROC_XXX flags in src/include/storage/proc.h
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* to avoid forcing to include proc.h when including procarray.h. So if you modify
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* PROC_XXX flags, you need to modify these flags.
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*/
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#define PROCARRAY_VACUUM_FLAG 0x02 /* currently running lazy
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* vacuum */
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#define PROCARRAY_ANALYZE_FLAG 0x04 /* currently running
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* analyze */
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#define PROCARRAY_LOGICAL_DECODING_FLAG 0x10 /* currently doing logical
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* decoding outside xact */
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#define PROCARRAY_SLOTS_XMIN 0x20 /* replication slot xmin,
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* catalog_xmin */
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/*
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* Only flags in PROCARRAY_PROC_FLAGS_MASK are considered when matching
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* PGXACT->vacuumFlags. Other flags are used for different purposes and
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* have no corresponding PROC flag equivalent.
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*/
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#define PROCARRAY_PROC_FLAGS_MASK (PROCARRAY_VACUUM_FLAG | \
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PROCARRAY_ANALYZE_FLAG | \
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PROCARRAY_LOGICAL_DECODING_FLAG)
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/* Use the following flags as an input "flags" to GetOldestXmin function */
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/* Consider all backends except for logical decoding ones which manage xmin separately */
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#define PROCARRAY_FLAGS_DEFAULT PROCARRAY_LOGICAL_DECODING_FLAG
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/* Ignore vacuum backends */
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#define PROCARRAY_FLAGS_VACUUM PROCARRAY_FLAGS_DEFAULT | PROCARRAY_VACUUM_FLAG
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/* Ignore analyze backends */
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#define PROCARRAY_FLAGS_ANALYZE PROCARRAY_FLAGS_DEFAULT | PROCARRAY_ANALYZE_FLAG
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/* Ignore both vacuum and analyze backends */
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#define PROCARRAY_FLAGS_VACUUM_ANALYZE PROCARRAY_FLAGS_DEFAULT | PROCARRAY_VACUUM_FLAG | PROCARRAY_ANALYZE_FLAG
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extern Size ProcArrayShmemSize(void);
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extern void CreateSharedProcArray(void);
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extern void ProcArrayAdd(PGPROC *proc);
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extern void ProcArrayRemove(PGPROC *proc, TransactionId latestXid);
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extern void ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid);
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extern void ProcArrayClearTransaction(PGPROC *proc);
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extern void ProcArrayInitRecovery(TransactionId initializedUptoXID);
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extern void ProcArrayApplyRecoveryInfo(RunningTransactions running);
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extern void ProcArrayApplyXidAssignment(TransactionId topxid,
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int nsubxids, TransactionId *subxids);
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extern void RecordKnownAssignedTransactionIds(TransactionId xid);
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extern void ExpireTreeKnownAssignedTransactionIds(TransactionId xid,
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int nsubxids, TransactionId *subxids,
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TransactionId max_xid);
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extern void ExpireAllKnownAssignedTransactionIds(void);
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extern void ExpireOldKnownAssignedTransactionIds(TransactionId xid);
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extern int GetMaxSnapshotXidCount(void);
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extern int GetMaxSnapshotSubxidCount(void);
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extern Snapshot GetSnapshotData(Snapshot snapshot);
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extern bool ProcArrayInstallImportedXmin(TransactionId xmin,
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VirtualTransactionId *sourcevxid);
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extern bool ProcArrayInstallRestoredXmin(TransactionId xmin, PGPROC *proc);
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extern RunningTransactions GetRunningTransactionData(void);
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extern bool TransactionIdIsInProgress(TransactionId xid);
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extern bool TransactionIdIsActive(TransactionId xid);
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extern TransactionId GetOldestXmin(Relation rel, int flags);
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extern TransactionId GetOldestActiveTransactionId(void);
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extern TransactionId GetOldestSafeDecodingTransactionId(bool catalogOnly);
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extern VirtualTransactionId *GetVirtualXIDsDelayingChkpt(int *nvxids);
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extern bool HaveVirtualXIDsDelayingChkpt(VirtualTransactionId *vxids, int nvxids);
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extern PGPROC *BackendPidGetProc(int pid);
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extern PGPROC *BackendPidGetProcWithLock(int pid);
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extern int BackendXidGetPid(TransactionId xid);
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extern bool IsBackendPid(int pid);
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extern VirtualTransactionId *GetCurrentVirtualXIDs(TransactionId limitXmin,
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bool excludeXmin0, bool allDbs, int excludeVacuum,
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int *nvxids);
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extern VirtualTransactionId *GetConflictingVirtualXIDs(TransactionId limitXmin, Oid dbOid);
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extern pid_t CancelVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode);
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extern bool MinimumActiveBackends(int min);
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extern int CountDBBackends(Oid databaseid);
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extern int CountDBConnections(Oid databaseid);
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extern void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending);
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extern int CountUserBackends(Oid roleid);
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extern bool CountOtherDBBackends(Oid databaseId,
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int *nbackends, int *nprepared);
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extern void TerminateOtherDBBackends(Oid databaseId);
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extern void XidCacheRemoveRunningXids(TransactionId xid,
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int nxids, const TransactionId *xids,
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TransactionId latestXid);
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extern void ProcArraySetReplicationSlotXmin(TransactionId xmin,
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TransactionId catalog_xmin, bool already_locked);
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extern void ProcArrayGetReplicationSlotXmin(TransactionId *xmin,
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TransactionId *catalog_xmin);
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#endif /* PROCARRAY_H */
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