blob: 8903af8ec6bd43396d62e1d87c264a5eac7a7eb1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*-------------------------------------------------------------------------
*
* lmgr.h
* POSTGRES lock manager definitions.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: lmgr.h,v 1.22 1999/07/15 23:04:11 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef LMGR_H
#define LMGR_H
#include "storage/lock.h"
#include "utils/rel.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
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, int maxBackends);
#endif /* LMGR_H */
|
