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/*-------------------------------------------------------------------------
*
* lmgr.h--
* POSTGRES lock manager definitions.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: lmgr.h,v 1.16 1998/12/15 12:46:57 vadim Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef LMGR_H
#define LMGR_H
#include <storage/lock.h>
#include <utils/rel.h>
#include <catalog/catname.h>
#define AccessShareLock 1 /* SELECT */
#define RowShareLock 2 /* SELECT FOR UPDATE */
#define RowExclusiveLock 3 /* INSERT, UPDATE, DELETE */
#define ShareLock 4
#define ShareRowExclusiveLock 5
#define ExclusiveLock 6
#define AccessExclusiveLock 7
#define ExtendLock 8
extern LOCKMETHOD LockTableId;
typedef struct LockRelId
{
Oid relId; /* a relation identifier */
Oid dbId; /* a database identifier */
} LockRelId;
typedef struct LockInfoData
{
LockRelId lockRelId;
} LockInfoData;
typedef LockInfoData *LockInfo;
#define LockInfoIsValid(lockinfo) PointerIsValid(lockinfo)
extern LOCKMETHOD InitLockTable(void);
extern void RelationInitLockInfo(Relation relation);
extern void LockRelation(Relation relation, LOCKMODE lockmode);
extern void UnlockRelation(Relation relation, LOCKMODE lockmode);
/* this is for indices */
extern void LockPage(Relation relation, BlockNumber blkno, LOCKMODE lockmode);
extern void UnlockPage(Relation relation, BlockNumber blkno, LOCKMODE lockmode);
/* and this is for transactions */
extern void XactLockTableInsert(TransactionId xid);
extern void XactLockTableDelete(TransactionId xid);
extern void XactLockTableWait(TransactionId xid);
/* proc.c */
extern void InitProcGlobal(IPCKey key);
#endif /* LMGR_H */
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