RE: C function in when() clause of sequencer

["Chestnut, Ronald P." <ronc@slac.stanford.edu>]

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