Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 19 Oct 2005 17:46:46 -0500

Tim Mooney wrote:

I just wonder how an end user is going to specify that a link
should wait or block.  Right now, I have a custom seq record that
allows the user to specify wait/nowait for each output link, but
of course this requires an extra field associated with each link.

Tim's last point is IMHO an important one which I personally think might

be part of a better solution to this whole issue of sequencing and

synchronization of parallel links. Where we want to give users control

over the seq/sync of sets of links there needs to be information

supplied to configure the seq/sync process, but this information is not

usually meaningful where individual links are used.

It really only seems to make sense for this level of control to be

provided for the arrays of inputs to the sub and calc records and for

the sequence record, and there we might want to provide additional and

more complex sequencing between the input and output links. It should

become obvious from that particular example that this sequencing and

synchronization between links is really nothing to do with the link type

at all, so it shouldn't be specified through the link configuration.

- Andrew
--
English probably arose from Normans trying to pick up Saxon girls.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System