EPICS Home EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

Format page
for printing


Search Tech-talk
1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020>  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020>  2021  2022  2023  2024 
<== Date ==> <== Thread ==>
Subject: Setting an array to zero length
From: "Rogers, Will \(DLSLtd, RAL, LSCI\) via Tech-talk" <tech-talk at aps.anl.gov>
To: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date: Fri, 3 Apr 2020 10:43:05 +0000
I suspect that this may not be a simple question, but:
  • If I create a waveform WAVE with a soft IOC of length 10, it has WAVE.NELM as 10 and WAVE.NORD as 0
  • If I caput 5 elements to it (e.g. with Cothread) it has WAVE.NELM as 10 and WAVE.NORD as 5
Is there a way to restore it to its uninitialised state with WAVE.NORD as 0? How general could this be for different record types?

The intention is for a save-and-restore type application (Pyburt) - if we save a PV when it is uninitialised we would like the restore process to return it to that state.

Thanks,
Willl


 

-- 

This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail.
Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd.
Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message.
Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom
 

Replies:
Re: Setting an array to zero length Ben Franksen via Tech-talk
Navigate by Date:
Prev: Re: Packages to build EPICS base, synApps, and areaDetector on Centos 8 Pedersen, Ulrik (DLSLtd, RAL, LSCI) via Tech-talk
Next: Re: Setting an array to zero length Ben Franksen via Tech-talk
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020>  2021  2022  2023  2024 
Navigate by Thread:
Prev: RE: Contributing a new how-to to the EPICS web site Mark Rivers via Tech-talk
Next: Re: Setting an array to zero length Ben Franksen via Tech-talk
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020>  2021  2022  2023  2024 
ANJ, 06 Apr 2020 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·