Experimental Physics and
Industrial Control System

Dirk Zimoch <[email protected]> · Mon, 25 Oct 2010 16:35:58 -0000

I thought about ways to convert strings to numbers (or pointers) beforehand. The problem is that the event a record posts may change each time the record processes. This is unlikely but nevertheless possible. It would require a special treatment of event.VAL and calcout.OEVT. Whenever the field is changed, the special support could convert the string into a pointer to the scan list which is then stored in another field.

While this is possible with special support, I have no hope for event records reading the event from INP or SIOL. Is there any way to find out if a link target has changed it value without actually comparing the values? In the worst case, the string has to be converted to pointer each time the event record processes when in simulation mode or using soft device support.

This approach means that the code to convert string to pointer has to go into the soft device support and any other device support that modifies event.VAL. My previous approach was backward compatible to existing device supports.
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https://code.launchpad.net/~dirk.zimoch/epics-base/named-soft-events/+merge/26190
Your team EPICS Core Developers is requested to review the proposed merge of lp:~dirk.zimoch/epics-base/named-soft-events into lp:epics-base.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System