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/*-------------------------------------------------------------------------
*
* sinvaladt.h
* POSTGRES shared cache invalidation data manager.
*
* The shared cache invalidation manager is responsible for transmitting
* invalidation messages between backends. Any message sent by any backend
* must be delivered to all already-running backends before it can be
* forgotten. (If we run out of space, we instead deliver a "RESET"
* message to backends that have fallen too far behind.)
*
* The struct type SharedInvalidationMessage, defining the contents of
* a single message, is defined in sinval.h.
*
* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/storage/sinvaladt.h
*
*-------------------------------------------------------------------------
*/
#ifndef SINVALADT_H
#define SINVALADT_H
#include "storage/lock.h"
#include "storage/sinval.h"
/*
* prototypes for functions in sinvaladt.c
*/
extern Size SInvalShmemSize(void);
extern void CreateSharedInvalidationState(void);
extern void SharedInvalBackendInit(bool sendOnly);
extern PGPROC *BackendIdGetProc(int backendID);
extern void BackendIdGetTransactionIds(int backendID, TransactionId *xid,
TransactionId *xmin, int *nsubxid,
bool *overflowed);
extern void SIInsertDataEntries(const SharedInvalidationMessage *data, int n);
extern int SIGetDataEntries(SharedInvalidationMessage *data, int datasize);
extern void SICleanupQueue(bool callerHasWriteLock, int minFree);
extern LocalTransactionId GetNextLocalTransactionId(void);
#endif /* SINVALADT_H */
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