Experimental Physics and
Industrial Control System

Kay-Uwe Kasemir <[email protected]> · Wed, 29 Jun 2005 12:13:55 -0400

On Jun 29, 2005, at 07:34, Ralph Lange wrote:

Suggestion:
For V4, make FLNK an array of links with a default size of zero.

The user-defined field would also allow for no default FLNKs at all,
then the user adds as many as needed.
That way you could have nice looking field names:

 user_field(convert_units, "MyConversionCalcRecord",

fwd_link_handler);

 user_field(determine_output, "MyOutputCalcRecord",

fwd_link_handler);

 user_field(write_output, "MyOutputRecord",

fwd_link_handler);

instead of FLNK[0..2].

FLNKs do seem fundamental enough, though,
that I agree with putting them into the base record,
where they might process faster.

One question about processing:
In the current a.FLNK -> b.FLNK -> ... chain,
each individual record's process() routine could decide on its own
as to how it handles the process links.
If b is async, we're waiting until it ends processing
because b decides when to invoke the FLNK.

Will FLNKs[0...N] simply get processed and the originating record
is done, or will it process & wait for completion of FLNK[0],
then proc & wait for FLNK[1], ... ?

-Kay

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System