Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Fri, 25 Feb 2005 09:01:23 -0600

A few brief comments about dataAccess.

In the tutorial "dataViewer" is used in several places. I think you mean

propertyViewer.

I can see how almost everything in the da*.h files could be described in

Java (unsigned is one exception). Everyplace where dataAccess uses

multiple inheritence, the classes are equivalent to Java interfaces. In

fact it looks easy to create an equivalent set of Java classes and

interfaces for what appears in da*.h. Of course, this is not the

implementation but only the user interface.

I can also see how record/device support could be written in C instead

of C++ and dataAccess could still be used by iocCore supplied libraries

to transport data into and out of records. If we go with the V4 DBD idea

of struct and array, utilities like dbToStructH,etc, could generate a

header file AND code that uses dataAccess to get/put the struct fields.

We still have lots to think about in order to implement the Functional

Requirements for V4. If we decide to use dataAccess it is only part of

what is required.

Marty