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/*-------------------------------------------------------------------------
*
* lmgr.h--
* POSTGRES lock manager definitions.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: lmgr.h,v 1.6 1997/09/07 05:01:25 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef LMGR_H
#define LMGR_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 LRelIdGetRelationId(LRelId lRelId);
extern void RelationInitLockInfo(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);
/* 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);
/* single.c */
extern bool SingleLockReln(LockInfo linfo, LOCKT lockt, int action);
extern bool
SingleLockPage(LockInfo linfo, ItemPointer tidPtr,
LOCKT lockt, int action);
/* proc.c */
extern void InitProcGlobal(IPCKey key);
#endif /* LMGR_H */
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