From: | Teodor Sigaev <teodor(at)sigaev(dot)ru> |
---|---|
To: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
Cc: | Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: jsonb access operators inefficiency |
Date: | 2014-05-30 16:45:26 |
Message-ID: | 5388B5A6.8060002@sigaev.ru |
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Thread: | |
Lists: | pgsql-hackers |
> I see that palloc.h says:
>
> The result of palloc() is always word-aligned
void *
repalloc(void *pointer, Size size)
{
...
/*
* Try to detect bogus pointers handed to us, poorly though we can.
* Presumably, a pointer that isn't MAXALIGNED isn't pointing at an
* allocated chunk.
*/
Assert(pointer != NULL);
Assert(pointer == (void *) MAXALIGN(pointer));
...
>
>
> so maybe my alignment fear is misplaced. So my remaining question is
> whether this is OK stylistically.
Something like this?
initStringInfoVarlena()/makeStringInfoVarlena()
{
initStringInfo()
appendStringInfoSpaces(jtext, VARHDRSZ);
}
char*
formStringInfoVarlena()
{
SET_VARSIZE(jtext->data, jtext->len);
return jtext->data;
}
--
Teodor Sigaev E-mail: teodor(at)sigaev(dot)ru
WWW: http://www.sigaev.ru/
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