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29275b1d17
Reported-by: Michael Paquier Discussion: https://postgr.es/m/ZZKTDPxBBMt3C0J9@paquier.xyz Backpatch-through: 12
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/*-------------------------------------------------------------------------
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*
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* sinvaladt.h
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* POSTGRES shared cache invalidation data manager.
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*
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* The shared cache invalidation manager is responsible for transmitting
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* invalidation messages between backends. Any message sent by any backend
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* must be delivered to all already-running backends before it can be
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* forgotten. (If we run out of space, we instead deliver a "RESET"
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* message to backends that have fallen too far behind.)
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*
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* The struct type SharedInvalidationMessage, defining the contents of
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* a single message, is defined in sinval.h.
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*
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* Portions Copyright (c) 1996-2024, 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/sinvaladt.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef SINVALADT_H
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#define SINVALADT_H
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#include "storage/lock.h"
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#include "storage/sinval.h"
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/*
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* prototypes for functions in sinvaladt.c
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*/
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extern Size SInvalShmemSize(void);
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extern void CreateSharedInvalidationState(void);
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extern void SharedInvalBackendInit(bool sendOnly);
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extern PGPROC *BackendIdGetProc(int backendID);
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extern void BackendIdGetTransactionIds(int backendID, TransactionId *xid,
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TransactionId *xmin, int *nsubxid,
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bool *overflowed);
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extern void SIInsertDataEntries(const SharedInvalidationMessage *data, int n);
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extern int SIGetDataEntries(SharedInvalidationMessage *data, int datasize);
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extern void SICleanupQueue(bool callerHasWriteLock, int minFree);
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extern LocalTransactionId GetNextLocalTransactionId(void);
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#endif /* SINVALADT_H */
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