PostgreSQL Source Code git master
visibilitymap.h
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1/*-------------------------------------------------------------------------
2 *
3 * visibilitymap.h
4 * visibility map interface
5 *
6 *
7 * Portions Copyright (c) 2007-2025, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
9 *
10 * src/include/access/visibilitymap.h
11 *
12 *-------------------------------------------------------------------------
13 */
14#ifndef VISIBILITYMAP_H
15#define VISIBILITYMAP_H
16
18#include "access/xlogdefs.h"
19#include "storage/block.h"
20#include "storage/buf.h"
21#include "utils/relcache.h"
22
23/* Macros for visibilitymap test */
24#define VM_ALL_VISIBLE(r, b, v) \
25 ((visibilitymap_get_status((r), (b), (v)) & VISIBILITYMAP_ALL_VISIBLE) != 0)
26#define VM_ALL_FROZEN(r, b, v) \
27 ((visibilitymap_get_status((r), (b), (v)) & VISIBILITYMAP_ALL_FROZEN) != 0)
28
29extern bool visibilitymap_clear(Relation rel, BlockNumber heapBlk,
30 Buffer vmbuf, uint8 flags);
31extern void visibilitymap_pin(Relation rel, BlockNumber heapBlk,
32 Buffer *vmbuf);
33extern bool visibilitymap_pin_ok(BlockNumber heapBlk, Buffer vmbuf);
35 BlockNumber heapBlk, Buffer heapBuf,
36 XLogRecPtr recptr,
37 Buffer vmBuf,
38 TransactionId cutoff_xid,
39 uint8 flags);
40extern uint8 visibilitymap_get_status(Relation rel, BlockNumber heapBlk, Buffer *vmbuf);
41extern void visibilitymap_count(Relation rel, BlockNumber *all_visible, BlockNumber *all_frozen);
43 BlockNumber nheapblocks);
44
45#endif /* VISIBILITYMAP_H */
uint32 BlockNumber
Definition: block.h:31
int Buffer
Definition: buf.h:23
uint8_t uint8
Definition: c.h:500
uint32 TransactionId
Definition: c.h:623
bool visibilitymap_pin_ok(BlockNumber heapBlk, Buffer vmbuf)
bool visibilitymap_clear(Relation rel, BlockNumber heapBlk, Buffer vmbuf, uint8 flags)
void visibilitymap_pin(Relation rel, BlockNumber heapBlk, Buffer *vmbuf)
uint8 visibilitymap_get_status(Relation rel, BlockNumber heapBlk, Buffer *vmbuf)
BlockNumber visibilitymap_prepare_truncate(Relation rel, BlockNumber nheapblocks)
void visibilitymap_count(Relation rel, BlockNumber *all_visible, BlockNumber *all_frozen)
uint8 visibilitymap_set(Relation rel, BlockNumber heapBlk, Buffer heapBuf, XLogRecPtr recptr, Buffer vmBuf, TransactionId cutoff_xid, uint8 flags)
uint64 XLogRecPtr
Definition: xlogdefs.h:21