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Add declaration-level assertions for compile-time checks

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Those new assertions can be used at file scope, outside of any function
for compilation checks.  This commit provides implementations for C and
C++, and fallback implementations.

Author: Peter Smith
Reviewed-by: Andres Freund, Kyotaro Horiguchi, Dagfinn Ilmari Mannsåker,
Michael Paquier
Discussion: https://postgr.es/m/201DD0641B056142AC8C6645EC1B5F62014B8E8030@SYD1217
This commit is contained in:
Michael Paquier
2020-02-03 14:48:42 +09:00
parent 6148e2b9a6
commit f1f10a1ba9
7 changed files with 76 additions and 12 deletions
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10
src/include/storage/bufpage.h
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@@ -418,6 +418,16 @@ do { \
((overwrite) ? PAI_OVERWRITE : 0) | \
((is_heap) ? PAI_IS_HEAP : 0))
/*
* 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.
*/
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 OffsetNumber PageAddItemExtended(Page page, Item item, Size size,