genSub V1-5

[Andy Foster <ajf@observatorysciences.co.uk>]

Dear All,

I've modified the "genSub" record very slightly to solve
a potential problem when using this record with EPICS 3.13.9.
In 3.13.9, the macro for "dbGetLink"
(and "dbPutLink") changed. This meant that, for this
particular record, it was possible for all links downstream
of a constant link to actually fetch
0 elements rather the number you were expecting. And this is
because the number of requested elements is overwritten with
0 when accessing a constant link.

The solution was to make sure to explicitly reset the number
of requested elements in the record support code (as is done
in the standard records) before calling "dbGetLink" and not
to rely on this parameter remaining the same after a constant link.

This is version 1-5 and can be found at:

http://www.observatorysciences.co.uk/epics.htm

Note, it is fully compatible with older 3.13 releases
but has not been modified to run under 3.14.

Cheers,

Andy

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