mirror of
https://github.com/postgres/postgres.git
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5cbfce562f
Includes some manual cleanup of places that pgindent messed up,
most of which weren't per project style anyway.
Notably, it seems some people didn't absorb the style rules of
commit c9d297751, because there were a bunch of new occurrences
of function calls with a newline just after the left paren, all
with faulty expectations about how the rest of the call would get
indented.
50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* visibilitymap.h
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* visibility map interface
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*
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*
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* Portions Copyright (c) 2007-2020, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/access/visibilitymap.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef VISIBILITYMAP_H
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#define VISIBILITYMAP_H
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#include "access/xlogdefs.h"
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#include "storage/block.h"
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#include "storage/buf.h"
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#include "utils/relcache.h"
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/* Number of bits for one heap page */
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#define BITS_PER_HEAPBLOCK 2
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/* Flags for bit map */
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#define VISIBILITYMAP_ALL_VISIBLE 0x01
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#define VISIBILITYMAP_ALL_FROZEN 0x02
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#define VISIBILITYMAP_VALID_BITS 0x03 /* OR of all valid visibilitymap
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* flags bits */
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/* Macros for visibilitymap test */
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#define VM_ALL_VISIBLE(r, b, v) \
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((visibilitymap_get_status((r), (b), (v)) & VISIBILITYMAP_ALL_VISIBLE) != 0)
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#define VM_ALL_FROZEN(r, b, v) \
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((visibilitymap_get_status((r), (b), (v)) & VISIBILITYMAP_ALL_FROZEN) != 0)
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extern bool visibilitymap_clear(Relation rel, BlockNumber heapBlk,
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Buffer vmbuf, uint8 flags);
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extern void visibilitymap_pin(Relation rel, BlockNumber heapBlk,
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Buffer *vmbuf);
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extern bool visibilitymap_pin_ok(BlockNumber heapBlk, Buffer vmbuf);
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extern void visibilitymap_set(Relation rel, BlockNumber heapBlk, Buffer heapBuf,
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XLogRecPtr recptr, Buffer vmBuf, TransactionId cutoff_xid,
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uint8 flags);
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extern uint8 visibilitymap_get_status(Relation rel, BlockNumber heapBlk, Buffer *vmbuf);
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extern void visibilitymap_count(Relation rel, BlockNumber *all_visible, BlockNumber *all_frozen);
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extern BlockNumber visibilitymap_prepare_truncate(Relation rel,
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BlockNumber nheapblocks);
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#endif /* VISIBILITYMAP_H */
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