Re: C function in when() clause of sequencer

[Eric Norum <norume@aps.anl.gov>]

For the example shown perhaps Dennis might get the source cleanup he  
wants by making 'softCheck' a C preprocessor macro?

On Jan 3, 2007, at 11:49 AM, Chestnut, Ronald P. wrote:

> The simple answer is "no".
>
> The long answer is that the SNL compiler sets up complex structures  
> with linked events and such to cause retriggering of the WHEN  
> clause in a structured manner. The compiler would just choke, and  
> nothing reasonable would happen even if it didn't.
>
> Ron Chestnut
>
> -----Original Message-----
> From: Dennis Nicklaus [mailto:nicklaus@fnal.gov]
> Sent: Wednesday, January 03, 2007 9:19 AM
> To: tech-talk@aps.anl.gov
> Subject: C function in when() clause of sequencer
>
> Hi,
> Is it possible to call a C function to avoid having a very  
> cumbersome when clause in my epics sequencer program? I get some  
> compiler error or other when I try different variations, so I'm  
> hoping someone can tell me the best way to handle this.
>
>
> What I want is instead of this:
> when ((vacuumReading >vacuum_high) ||(tempReading >tempCerm_high)
>           ||(eminusReading >electron_high) ||(pmtReading  
> >pmtlight_high))
>      {
>       } state backOff
>
> I would like to do this:
> %{
> /*
>     This function checks for exceeding any of the soft limits.
> */
> static int softCheck()
> {
>     return(
>     (vacuumReading >vacuum_high)
>     ||(tempReading >tempCerm_high)
>     ||(eminusReading >electron_high)
>     ||(pmtReading >pmtlight_high)
>     );
> }
> }%
>
> ...
>       when (softCheck())
>       } state backOff
>
> Thanks,
> Dennis

--
Eric Norum <norume@aps.anl.gov>
Advanced Photon Source
Argonne National Laboratory
(630) 252-4793