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65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* multilev.h--
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* multi level lock table consts/defs for single.c and multi.c and their
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* clients
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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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* $Id: multilev.h,v 1.1 1996/08/28 01:58:17 scrappy Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef MULTILEV_H
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#define MULTILEV_H
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#include "storage/lock.h"
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#include "storage/lmgr.h"
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#define READ_LOCK 2
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#define WRITE_LOCK 1
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/* any time a small granularity READ/WRITE lock is set.
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* Higher granularity READ_INTENT/WRITE_INTENT locks must
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* also be set. A read intent lock is has value READ+INTENT.
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* in this implementation.
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*/
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#define NO_LOCK 0
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#define INTENT 2
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#define READ_INTENT (READ_LOCK+INTENT)
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#define WRITE_INTENT (WRITE_LOCK+INTENT)
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#define EXTEND_LOCK 5
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#define SHORT_TERM 1
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#define LONG_TERM 2
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#define UNLOCK 0
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#define N_LEVELS 3
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#define RELN_LEVEL 0
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#define PAGE_LEVEL 1
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#define TUPLE_LEVEL 2
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typedef int LOCK_LEVEL;
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/* multi.c */
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extern LockTableId MultiTableId;
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extern LockTableId ShortTermTableId;
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/*
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* function prototypes
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*/
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extern LockTableId InitMultiLevelLockm(void);
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extern bool MultiLockReln(LockInfo linfo, LOCKT lockt);
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extern bool MultiLockTuple(LockInfo linfo, ItemPointer tidPtr, LOCKT lockt);
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extern bool MultiLockPage(LockInfo linfo, ItemPointer tidPtr, LOCKT lockt);
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extern bool MultiAcquire(LockTableId tableId, LOCKTAG *tag, LOCKT lockt,
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LOCK_LEVEL level);
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extern bool MultiReleasePage(LockInfo linfo, ItemPointer tidPtr, LOCKT lockt);
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extern bool MultiReleaseReln(LockInfo linfo, LOCKT lockt);
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extern bool MultiRelease(LockTableId tableId, LOCKTAG *tag, LOCKT lockt,
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LOCK_LEVEL level);
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#endif /* MULTILEV_H */
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