Z User Workshop, Oxford 1990

Name: Z User Workshop, Oxford 1990
Brand: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
SKU: 9783540196723
Price: 20042 HUF
Availability: InStock

Proceedings of the Fifth Annual Z User Meeting, Oxford, 17-18 December 1990

Szerző: J.E. Nicholls

Nyelv:

Kötés: Puha kötésű

Kiadó: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG

Elérhetőség: Beszállítói készleten

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The approach described in [JonSl, JonS3a, JonS3b] set out to extend operation decom position methods...

Információk a könyvről

Szerző

J.E. Nicholls

Nyelv

Angol

Kötés

Könyv - Puha kötésű

Kiadva

1991

oldal

389

EAN

9783540196723

ISBN

3540196722

Enbook ID

02006899

Kiadó

Springer-Verlag Berlin and Heidelberg GmbH & Co. KG

Súly

688

Méretek

170 x 244 x 22

Teljes leírás

The approach described in [JonSl, JonS3a, JonS3b] set out to extend operation decom position methods for sequential programs - such as are used in VDM [Jon90] - to cover concurrent shared-variable systems. The essential step in [JonSl] was to recognise that 1 inter/erence had to be specified. This is necessary in order to achieve a notion of compo sitionality - contrast [Owi75]. Rather than the many erudite definitions of composition ality (e. g. [ZwiSS]), the view taken here is that, when a development task is decomposed into sub-tasks, these must be simpler than the original 'task. This is easy to achieve for sequential programs: decomposing a specified operation S into (Sl; S2), the specifica tions of the Sj should neither include unnecessary information from each other nor from the context (i. e. S). An interesting discussion of the 'Quest for Compositionality' (in the context of concurrency) is contained in [dRS5, dRS6]. The rely/guarantee idea provided an existence proof that specifications and developments could be made powerful enough to cope with some forms of interference. The work initially attracted little attention but 2 3 there have recently been some critiques and attempts to extend the work Most notably, Ketil St~len's thesis [St~90] addresses the main shortcomings of [JonSl]: the fact that no attempt had been made to handle synchronization has been remedied by adding a wait condition and other limitations of expressiveness have been shown to succumb to the judicious use of auxiliary variables.

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Z User Workshop, Oxford 1990

Proceedings of the Fifth Annual Z User Meeting, Oxford, 17-18 December 1990

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