blob: 428898bdac23938db9abab136a657f3e0fa1818a (
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
|
/*-------------------------------------------------------------------------
*
* freespace.h
* POSTGRES free space map for quickly finding free space in relations
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: freespace.h,v 1.8 2002/09/20 19:56:01 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef FREESPACE_H_
#define FREESPACE_H_
#include "storage/block.h"
#include "storage/relfilenode.h"
/*
* exported types
*/
typedef struct PageFreeSpaceInfo
{
BlockNumber blkno; /* which page in relation */
Size avail; /* space available on this page */
} PageFreeSpaceInfo;
extern int MaxFSMRelations;
extern int MaxFSMPages;
/*
* function prototypes
*/
extern void InitFreeSpaceMap(void);
extern int FreeSpaceShmemSize(void);
extern BlockNumber GetPageWithFreeSpace(RelFileNode *rel, Size spaceNeeded);
extern void RecordFreeSpace(RelFileNode *rel, BlockNumber page,
Size spaceAvail);
extern BlockNumber RecordAndGetPageWithFreeSpace(RelFileNode *rel,
BlockNumber oldPage,
Size oldSpaceAvail,
Size spaceNeeded);
extern void MultiRecordFreeSpace(RelFileNode *rel,
BlockNumber minPage,
int nPages,
PageFreeSpaceInfo *pageSpaces);
extern void FreeSpaceMapForgetRel(RelFileNode *rel);
extern void FreeSpaceMapForgetDatabase(Oid dbid);
#ifdef FREESPACE_DEBUG
extern void DumpFreeSpace(void);
#endif
#endif /* FREESPACE_H */
|
