1996-08-28 03:59:28 +02:00
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/*-------------------------------------------------------------------------
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*
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* lmgr.h--
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* POSTGRES lock manager definitions.
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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1996-10-31 10:51:30 +01:00
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* $Id: lmgr.h,v 1.2 1996/10/31 09:49:56 scrappy Exp $
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1996-08-28 03:59:28 +02:00
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef LMGR_H
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#define LMGR_H
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#include "storage/itemptr.h"
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#include "storage/lock.h"
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#include "utils/rel.h"
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/*
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* This was moved from pladt.h for the new lock manager. Want to obsolete
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* all of the old code.
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*/
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typedef struct LRelId {
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Oid relId; /* a relation identifier */
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Oid dbId; /* a database identifier */
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} LRelId;
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typedef struct LockInfoData {
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bool initialized;
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LRelId lRelId;
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TransactionId transactionIdData;
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uint16 flags;
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} LockInfoData;
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typedef LockInfoData *LockInfo;
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#define LockInfoIsValid(linfo) \
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((PointerIsValid(linfo)) && ((LockInfo) linfo)->initialized)
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extern LRelId RelationGetLRelId(Relation relation);
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extern Oid LRelIdGetDatabaseId(LRelId lRelId);
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extern Oid LRelIdGetRelationId(LRelId lRelId);
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extern bool DatabaseIdIsMyDatabaseId(Oid databaseId);
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extern bool LRelIdContainsMyDatabaseId(LRelId lRelId);
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extern void RelationInitLockInfo(Relation relation);
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extern void RelationDiscardLockInfo(Relation relation);
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extern void RelationSetLockForDescriptorOpen(Relation relation);
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extern void RelationSetLockForRead(Relation relation);
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extern void RelationUnsetLockForRead(Relation relation);
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extern void RelationSetLockForWrite(Relation relation);
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extern void RelationUnsetLockForWrite(Relation relation);
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extern void RelationSetLockForTupleRead(Relation relation,
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ItemPointer itemPointer);
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/* used in vaccum.c */
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extern void RelationSetLockForWritePage(Relation relation,
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ItemPointer itemPointer);
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/* used in nbtpage.c, hashpage.c */
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extern void RelationSetSingleWLockPage(Relation relation,
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ItemPointer itemPointer);
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extern void RelationUnsetSingleWLockPage(Relation relation,
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ItemPointer itemPointer);
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extern void RelationSetSingleRLockPage(Relation relation,
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ItemPointer itemPointer);
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extern void RelationUnsetSingleRLockPage(Relation relation,
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ItemPointer itemPointer);
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extern void RelationSetRIntentLock(Relation relation);
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extern void RelationUnsetRIntentLock(Relation relation);
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extern void RelationSetWIntentLock(Relation relation);
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extern void RelationUnsetWIntentLock(Relation relation);
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extern void RelationSetLockForExtend(Relation relation);
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extern void RelationUnsetLockForExtend(Relation relation);
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extern void LRelIdAssign(LRelId *lRelId, Oid dbId, Oid relId);
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/* single.c */
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extern bool SingleLockReln(LockInfo linfo, LOCKT lockt, int action);
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extern bool SingleLockPage(LockInfo linfo, ItemPointer tidPtr,
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LOCKT lockt, int action);
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#endif /* LMGR_H */
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