Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Wed, 3 Jan 2007 12:02:43 -0600

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:[email protected]]
Sent: Wednesday, January 03, 2007 9:19 AM
To: [email protected]
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 <[email protected]>
Advanced Photon Source
Argonne National Laboratory
(630) 252-4793

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System