Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Fri, 09 Apr 2004 10:24:37 -0500

Peregrine McGehee wrote:

As you pointed out, the use of PUTF does not afford a
general solution and that this is only valid for a specific
combination of record linkages and CA client actions:
1. the record must be scan Passive.
2. the "write" action must be triggered by a dbPut to a field
with Process Passive set.

This should say dbPutField, i.e. a put from outside database access.
PUTF is not set if processing occured because an output DB_LINK caused
dbProcess to be called.
3. the "read" action must be triggered by a FLNK.
Is the latter condition equivalent to someone calling dbProcess()

directly?

This sounds correct. But be careful when calling calling dbProcess. In
particular don't call it if you are running under a scan task. When not
part of a scan task it must be surrounded by dbScanLock/dbScanUnlock.
Marty

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System