From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
---|---|
To: | Heikki Linnakangas <hlinnakangas(at)vmware(dot)com> |
Cc: | Peter Eisentraut <peter_e(at)gmx(dot)net>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: more psprintf() use |
Date: | 2014-01-02 08:53:34 |
Message-ID: | 20140102085334.GB2683@awork2.anarazel.de |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
On 2014-01-02 09:49:48 +0200, Heikki Linnakangas wrote:
> On 01/02/2014 05:14 AM, Peter Eisentraut wrote:
> >diff --git a/contrib/hstore/hstore_io.c b/contrib/hstore/hstore_io.c
> >index 772a5ca..8331a56 100644
> >--- a/contrib/hstore/hstore_io.c
> >+++ b/contrib/hstore/hstore_io.c
> >@@ -1114,11 +1114,7 @@
> > HEntry *entries = ARRPTR(in);
> >
> > if (count == 0)
> >- {
> >- out = palloc(1);
> >- *out = '\0';
> >- PG_RETURN_CSTRING(out);
> >- }
> >+ PG_RETURN_CSTRING("");
> >
> > buflen = 0;
>
> Is it legal to return a constant with PG_RETURN_CSTRING? Grepping around, I
> don't see that being done anywhere else, but there are places that do
> PG_RETURN_CSTRING(pstrdup(<constant>))...
I don't see why it wouldn't be legal - constant strings have static
storage duration, i.e. the program lifetime. And I can see nothing that
would allow pfree()ing the return value of cstring returning functions
in the general case.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
From | Date | Subject | |
---|---|---|---|
Next Message | Andres Freund | 2014-01-02 08:56:30 | Re: Patch: show relation and tuple infos of a lock to acquire |
Previous Message | Andres Freund | 2014-01-02 08:48:26 | Re: preserving forensic information when we freeze |