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Add repalloc0 and repalloc0_array

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These zero out the space added by repalloc.  This is a common pattern
that is quite hairy to code by hand.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/b66dfc89-9365-cb57-4e1f-b7d31813eeec@enterprisedb.com
This commit is contained in:
Peter Eisentraut
2022-11-12 20:31:27 +01:00
parent 30d98e14a8
commit b4b7ce8061
10 changed files with 48 additions and 71 deletions
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10
src/backend/utils/cache/typcache.c vendored
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@@ -1714,14 +1714,8 @@ ensure_record_cache_typmod_slot_exists(int32 typmod)
{
int32 newlen = pg_nextpower2_32(typmod + 1);
RecordCacheArray = (TupleDesc *) repalloc(RecordCacheArray,
newlen * sizeof(TupleDesc));
memset(RecordCacheArray + RecordCacheArrayLen, 0,
(newlen - RecordCacheArrayLen) * sizeof(TupleDesc));
RecordIdentifierArray = (uint64 *) repalloc(RecordIdentifierArray,
newlen * sizeof(uint64));
memset(RecordIdentifierArray + RecordCacheArrayLen, 0,
(newlen - RecordCacheArrayLen) * sizeof(uint64));
RecordCacheArray = repalloc0_array(RecordCacheArray, TupleDesc, RecordCacheArrayLen, newlen);
RecordIdentifierArray = repalloc0_array(RecordIdentifierArray, uint64, RecordCacheArrayLen, newlen);
RecordCacheArrayLen = newlen;
}
}