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/*-------------------------------------------------------------------------
*
* sinval.h
* POSTGRES shared cache invalidation communication definitions.
*
*
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: sinval.h,v 1.16 2000/11/28 23:27:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef SINVAL_H
#define SINVAL_H
#include "storage/itemptr.h"
#include "storage/spin.h"
extern SPINLOCK SInvalLock;
extern int SInvalShmemSize(int maxBackends);
extern void CreateSharedInvalidationState(int maxBackends);
extern void InitBackendSharedInvalidationState(void);
extern void RegisterSharedInvalid(int cacheId, Index hashIndex,
ItemPointer pointer);
extern void InvalidateSharedInvalid(void (*invalFunction) (),
void (*resetFunction) ());
extern bool DatabaseHasActiveBackends(Oid databaseId, bool ignoreMyself);
extern bool TransactionIdIsInProgress(TransactionId xid);
extern void GetXmaxRecent(TransactionId *XmaxRecent);
#endif /* SINVAL_H */
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