How can I return a pointer to a use structure from a function

From: Chongbing Liu <cliu(at)cs(dot)nmsu(dot)edu>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org, Chongbing Liu <cliu(at)cs(dot)nmsu(dot)edu>
Subject: How can I return a pointer to a use structure from a function
Date: 2003-12-19 19:34:34
Message-ID: Pine.LNX.4.58.0312191228060.20781@clink
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Thank you very much for your help.

In V1 function calling convention, there are micros
like PG_RETURN_TEXT_P and so on. Most of them are
used to return values of the built-in datatypes.

If I want the XXX_in function (for my own data type)
to return a pointer to a particular structure, what
micro should I use? i.e., how should I organize the
return value?

Thank you and wish you and everybody a merry Christmas.

Chongbing

On Fri, 19 Dec 2003, Tom Lane wrote:

> Chongbing Liu <cliu(at)cs(dot)nmsu(dot)edu> writes:
> > Hello, can you please tell me how to return a NULL value
> > from a function?
>
> You can't unless you use the V1 function calling convention. See the
> programmer's guide.
>
> regards, tom lane
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>

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