Concurrent Vector Writing: A First Exercise in Program Development
In the foregoing chapters we have seen a number of examples of how to use the technique of Strengthening the Annotation to show that a given, too-weakly annotated multiprogram is correct. There we strengthened the original annotation in a number of steps, until it became correct in the Core. Here, in this chapter, we will do exactly the same, be it not for a completed program, but for a program still to be completed. That is, along with a stronger annotation, new, additional code will see the light as well, and that is what we call program development. We have to admit, though, that in this first exercise not too much additional code will be developed, on the one hand because the current example is very simple and on the other hand because, in general, a development that is carried out with caution does not introduce more than needed.
KeywordsExpense Paral Amaze
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