Experimental Physics and
Industrial Control System

Benjamin Franksen <[email protected]> · Tue, 14 Feb 2012 19:54:48 +0100

Am Dienstag, 14. Februar 2012, 19:34:20 schrieb Andrew Johnson:
> On 2012-02-14 Nerses Gevorgyan wrote:
> > I'm trying to put into waveform record an array of STRINGs.
> >
> > As I understood from waveform code and manual the VAL field is
> > a void pointer which should be supplied by user.
>
> Sorry, if that's what the record reference manual says it's wrong.
>
> The prec->val field is never actually used inside the record source code.
> When you the access the VAL field of a waveform record through CA or a
> database link, the data is actually fetched from the prec->bptr field,

There is, BTW, no technical reason why VAL could not be used to hold the
pointer to the value buffer (instead of wasting another field for that) but,
presumably for historical reasons, that's not how it works.

Cheers
Ben

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System