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<== Date ==> <== Thread ==>

Subject: the seq that launched a thousand seqs
From: "Laznovsky Michael" <[email protected]>
To: <[email protected]>
Date: Thu, 29 Sep 2011 12:41:31 +0200
Hi- sent as private email, but maybe of interest to the community...

Mike

-----Original Message-----

If you ever need to launch a thousand seqs "for real", you could do what

I'm doing: rather than a humungous startup file, have a separate small
state 
set which reads a config file and calls seq() itself for each entry.
The 
only fly in the metaphorical ointment appears to be that snl progs seem 
to require at least one PV connection to be happy; with no PVs assigned 
it complains about "0 out of 0" connections, so you need a dummy PV in 
that state program (and Ben just told me that will be fixed in the next 
release).

And fwiw, it's better to have the "startup" seq hibernate rather than 
die, to ward off resource-destruction demons.

  //-----------------------------------------------
  // read -- read one config entry
  //-----------------------------------------------
  state read {
    when (1) {
%%    n = fscanf(fp,"%s %s %s",devName,devType,devCfg);
      if (n != 3) {
        if (feof(fp)) done = 1;
        else { //error
          bubu = 1;
        }
      }
    } state spawn
  }

  //-----------------------------------------------
  // spawn -- spawn one magnet-cycling seq
  //-----------------------------------------------
  state spawn {
    when (done || bubu) {
      if (fp) fclose(fp);
    } state done
    when (1) {  // !done
%%    {
%%      extern struct seqProgram seqMagCycle;
%%      char seqParms[99];
%%      sprintf(seqParms,"DEV=%s,TYP=%s,CFG=%s",devName,devType,devCfg);
%%      seq(&seqMagCycle,seqParms,0);
%%    }
    } state spawn_delay
  }

  //-----------------------------------------------
  // spawn_delay -- delay between spawns
  //-----------------------------------------------
  state spawn_delay {
#define SPAWN_DELAY 0.333  // adjust to taste
    when (SPAWN_DELAY) {
    } state read
  }



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