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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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9
src/backend/storage/lmgr/lwlock.c
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@@ -668,13 +668,8 @@ LWLockRegisterTranche(int tranche_id, const char *tranche_name)
MemoryContextAllocZero(TopMemoryContext,
newalloc * sizeof(char *));
else
{
LWLockTrancheNames = (const char **)
repalloc(LWLockTrancheNames, newalloc * sizeof(char *));
memset(LWLockTrancheNames + LWLockTrancheNamesAllocated,
0,
(newalloc - LWLockTrancheNamesAllocated) * sizeof(char *));
}
LWLockTrancheNames =
repalloc0_array(LWLockTrancheNames, const char *, LWLockTrancheNamesAllocated, newalloc);
LWLockTrancheNamesAllocated = newalloc;
}