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Use new overflow-safe integer comparison functions.

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Commit 6b80394781 introduced integer comparison functions designed
to be as efficient as possible while avoiding overflow.  This
commit makes use of these functions in many of the in-tree qsort()
comparators to help ensure transitivity.  Many of these comparator
functions should also see a small performance boost.

Author: Mats Kindahl
Reviewed-by: Andres Freund, Fabrízio de Royes Mello
Discussion: https://postgr.es/m/CA%2B14426g2Wa9QuUpmakwPxXFWG_1FaY0AsApkvcTBy-YfS6uaw%40mail.gmail.com
This commit is contained in:
Nathan Bossart
2024-02-16 14:05:36 -06:00
parent 6b80394781
commit 3b42bdb471
34 changed files with 80 additions and 159 deletions
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7
src/backend/replication/logical/reorderbuffer.c
View File

@ -91,6 +91,7 @@
#include "access/xact.h"
#include "access/xlog_internal.h"
#include "catalog/catalog.h"
#include "common/int.h"
#include "lib/binaryheap.h"
#include "miscadmin.h"
#include "pgstat.h"
@ -5119,11 +5120,7 @@ file_sort_by_lsn(const ListCell *a_p, const ListCell *b_p)
RewriteMappingFile *a = (RewriteMappingFile *) lfirst(a_p);
RewriteMappingFile *b = (RewriteMappingFile *) lfirst(b_p);
if (a->lsn < b->lsn)
return -1;
else if (a->lsn > b->lsn)
return 1;
return 0;
return pg_cmp_u64(a->lsn, b->lsn);
}
/*

8
src/backend/replication/syncrep.c
View File

@ -75,6 +75,7 @@
#include <unistd.h>
#include "access/xact.h"
#include "common/int.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "replication/syncrep.h"
@ -698,12 +699,7 @@ cmp_lsn(const void *a, const void *b)
XLogRecPtr lsn1 = *((const XLogRecPtr *) a);
XLogRecPtr lsn2 = *((const XLogRecPtr *) b);
if (lsn1 > lsn2)
return -1;
else if (lsn1 == lsn2)
return 0;
else
return 1;
return pg_cmp_u64(lsn2, lsn1);
}
/*