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blue-lemon0104
2026-04-07 13:35:22 +08:00
commit 0120fa9ce3
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79
pg_include/storage/procarray.h Executable file
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/*-------------------------------------------------------------------------
*
* procarray.h
* POSTGRES process array definitions.
*
*
* Portions Copyright (c) 1996-2012, 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/standby.h"
#include "utils/snapshot.h"
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 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,
TransactionId sourcexid);
extern RunningTransactions GetRunningTransactionData(void);
extern bool TransactionIdIsInProgress(TransactionId xid);
extern bool TransactionIdIsActive(TransactionId xid);
extern TransactionId GetOldestXmin(bool allDbs, bool ignoreVacuum);
extern TransactionId GetOldestActiveTransactionId(void);
extern int GetTransactionsInCommit(TransactionId **xids_p);
extern bool HaveTransactionsInCommit(TransactionId *xids, int nxids);
extern PGPROC *BackendPidGetProc(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 bool MinimumActiveBackends(int min);
extern int CountDBBackends(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);
#endif /* PROCARRAY_H */