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/*-------------------------------------------------------------------------
*
* lmgr.h--
* POSTGRES lock manager definitions.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: lmgr.h,v 1.1.1.1 1996/07/09 06:21:53 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef LMGR_H
#define LMGR_H
#include "postgres.h"
#include "storage/itemptr.h"
#include "storage/lock.h"
#include "utils/rel.h"
/*
* This was moved from pladt.h for the new lock manager. Want to obsolete
* all of the old code.
*/
typedef struct LRelId {
Oid relId; /* a relation identifier */
Oid dbId; /* a database identifier */
} LRelId;
typedef struct LockInfoData {
bool initialized;
LRelId lRelId;
TransactionId transactionIdData;
uint16 flags;
} LockInfoData;
typedef LockInfoData *LockInfo;
#define LockInfoIsValid(linfo) \
((PointerIsValid(linfo)) && ((LockInfo) linfo)->initialized)
extern LRelId RelationGetLRelId(Relation relation);
extern Oid LRelIdGetDatabaseId(LRelId lRelId);
extern Oid LRelIdGetRelationId(LRelId lRelId);
extern bool DatabaseIdIsMyDatabaseId(Oid databaseId);
extern bool LRelIdContainsMyDatabaseId(LRelId lRelId);
extern void RelationInitLockInfo(Relation relation);
extern void RelationDiscardLockInfo(Relation relation);
extern void RelationSetLockForDescriptorOpen(Relation relation);
extern void RelationSetLockForRead(Relation relation);
extern void RelationUnsetLockForRead(Relation relation);
extern void RelationSetLockForWrite(Relation relation);
extern void RelationUnsetLockForWrite(Relation relation);
extern void RelationSetLockForTupleRead(Relation relation,
ItemPointer itemPointer);
/* used in vaccum.c */
extern void RelationSetLockForWritePage(Relation relation,
ItemPointer itemPointer);
/* used in nbtpage.c, hashpage.c */
extern void RelationSetSingleWLockPage(Relation relation,
ItemPointer itemPointer);
extern void RelationUnsetSingleWLockPage(Relation relation,
ItemPointer itemPointer);
extern void RelationSetSingleRLockPage(Relation relation,
ItemPointer itemPointer);
extern void RelationUnsetSingleRLockPage(Relation relation,
ItemPointer itemPointer);
extern void RelationSetRIntentLock(Relation relation);
extern void RelationUnsetRIntentLock(Relation relation);
extern void RelationSetWIntentLock(Relation relation);
extern void RelationUnsetWIntentLock(Relation relation);
extern void RelationSetLockForExtend(Relation relation);
extern void RelationUnsetLockForExtend(Relation relation);
extern void LRelIdAssign(LRelId *lRelId, Oid dbId, Oid relId);
/* single.c */
extern bool SingleLockReln(LockInfo linfo, LOCKT lockt, int action);
extern bool SingleLockPage(LockInfo linfo, ItemPointer tidPtr,
LOCKT lockt, int action);
#endif /* LMGR_H */
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