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/*-------------------------------------------------------------------------
*
* multilev.h--
* multi level lock table consts/defs for single.c and multi.c and their
* clients
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: multilev.h,v 1.1.1.1 1996/07/09 06:21:53 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef MULTILEV_H
#define MULTILEV_H
#include "storage/lock.h"
#include "storage/lmgr.h"
#define READ_LOCK 2
#define WRITE_LOCK 1
/* any time a small granularity READ/WRITE lock is set.
* Higher granularity READ_INTENT/WRITE_INTENT locks must
* also be set. A read intent lock is has value READ+INTENT.
* in this implementation.
*/
#define NO_LOCK 0
#define INTENT 2
#define READ_INTENT (READ_LOCK+INTENT)
#define WRITE_INTENT (WRITE_LOCK+INTENT)
#define EXTEND_LOCK 5
#define SHORT_TERM 1
#define LONG_TERM 2
#define UNLOCK 0
#define N_LEVELS 3
#define RELN_LEVEL 0
#define PAGE_LEVEL 1
#define TUPLE_LEVEL 2
typedef int LOCK_LEVEL;
/* multi.c */
extern LockTableId MultiTableId;
extern LockTableId ShortTermTableId;
/*
* function prototypes
*/
extern LockTableId InitMultiLevelLockm(void);
extern bool MultiLockReln(LockInfo linfo, LOCKT lockt);
extern bool MultiLockTuple(LockInfo linfo, ItemPointer tidPtr, LOCKT lockt);
extern bool MultiLockPage(LockInfo linfo, ItemPointer tidPtr, LOCKT lockt);
extern bool MultiAcquire(LockTableId tableId, LOCKTAG *tag, LOCKT lockt,
LOCK_LEVEL level);
extern bool MultiReleasePage(LockInfo linfo, ItemPointer tidPtr, LOCKT lockt);
extern bool MultiReleaseReln(LockInfo linfo, LOCKT lockt);
extern bool MultiRelease(LockTableId tableId, LOCKTAG *tag, LOCKT lockt,
LOCK_LEVEL level);
#endif /* MULTILEV_H */
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