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Extend PageIsVerified() to handle more custom options

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This is useful for checks of relation pages without having to load the
pages into the shared buffers, and two cases can make use of that: page
verification in base backups and the online, lock-safe, flavor.

Compatibility is kept with past versions using a macro that calls the
new extended routine with the set of options compatible with the
original version.

Extracted from a larger patch by the same author.

Author: Anastasia Lubennikova
Reviewed-by: Michael Paquier, Julien Rouhaud
Discussion: https://postgr.es/m/608f3476-0598-2514-2c03-e05c7d2b0cbd@postgrespro.ru
This commit is contained in:
Michael Paquier
2020-10-26 09:55:28 +09:00
parent ba9f18abd3
commit d401c5769e
4 changed files with 37 additions and 16 deletions
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22
src/include/storage/bufpage.h
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@@ -404,26 +404,36 @@ do { \
* extern declarations
* ----------------------------------------------------------------
*/
/* flags for PageAddItemExtended() */
#define PAI_OVERWRITE (1 << 0)
#define PAI_IS_HEAP (1 << 1)
/* flags for PageIsVerifiedExtended() */
#define PIV_LOG_WARNING (1 << 0)
#define PIV_REPORT_STAT (1 << 1)
#define PageAddItem(page, item, size, offsetNumber, overwrite, is_heap) \
PageAddItemExtended(page, item, size, offsetNumber, \
((overwrite) ? PAI_OVERWRITE : 0) | \
((is_heap) ? PAI_IS_HEAP : 0))
#define PageIsVerified(page, blkno) \
PageIsVerifiedExtended(page, blkno, \
PIV_LOG_WARNING | PIV_REPORT_STAT)
/*
* Check that BLCKSZ is a multiple of sizeof(size_t). In PageIsVerified(),
* it is much faster to check if a page is full of zeroes using the native
* word size. Note that this assertion is kept within a header to make
* sure that StaticAssertDecl() works across various combinations of
* platforms and compilers.
* Check that BLCKSZ is a multiple of sizeof(size_t). In
* PageIsVerifiedExtended(), it is much faster to check if a page is
* full of zeroes using the native word size. Note that this assertion
* is kept within a header to make sure that StaticAssertDecl() works
* across various combinations of platforms and compilers.
*/
StaticAssertDecl(BLCKSZ == ((BLCKSZ / sizeof(size_t)) * sizeof(size_t)),
"BLCKSZ has to be a multiple of sizeof(size_t)");
extern void PageInit(Page page, Size pageSize, Size specialSize);
extern bool PageIsVerified(Page page, BlockNumber blkno);
extern bool PageIsVerifiedExtended(Page page, BlockNumber blkno, int flags);
extern OffsetNumber PageAddItemExtended(Page page, Item item, Size size,
OffsetNumber offsetNumber, int flags);
extern Page PageGetTempPage(Page page);