Download Concurrent and Real-time Systems: The CSP Approach by Steve Schneider PDF

By Steve Schneider

The CSP process has been usual within the specification, research and verification of concurrent and real-time platforms, and for figuring out the actual matters that may come up whilst concurrency is current. It presents a language which permits requisites and designs to be essentially expressed and understood, including a helping concept which permits them to be analyzed and proven to be correct.This booklet helps complicated point classes on concurrency overlaying timed and untimed CSP. the 1st part introduces the language of CSP, the first semantic versions (traces, mess ups, divergences and endless traces), and their use within the modelling, research and verification of concurrent structures. the second one half the booklet introduces time into the language, brings within the timed semantic version (timed disasters) and eventually provides the idea of timewise refinement which hyperlinks the 2 halves together.Accompanying site: http://www.cs.rhbnc.ac.uk/books/concurrencyContaining the following:-Exercises and solutions-Instructors assets- instance CSP courses to run on FDR and ProBe-Links to precious sitesPartial Contents: half I: The Language of CSP; Sequential tactics; Concurrency; Abstraction and keep watch over move; half II: reading techniques; strains; Specification and Verification with lines; reliable mess ups; Specification and Verification with mess ups; disasters, Divergences, and endless strains; half III: Introducing Time; The Timed Language; Timed transition platforms; half IV: Timed research; Semantics of Timed CSP; Timed Specification and Verification; Timewise Refinement; Appendix A: Event-based Time; A.1 typical CSP and $tock$; A.2 Translating from Timed CSP; A.3 Notes; Appendix B: Model-checking with FDR; B.1 Interacting with FDR; B.2 How FDR exams Refinement; B.3 computer readable CSP; Index of procedures.

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COUNT increment COUNT increment COUNT i decrement COUNT i COUNT i if i The counter begins at : COUNTER COUNT If there could be any number of increment and decrement events, in any order, then it would be unnecessary to keep track of the difference between them, and the process description C increment C decrement C would be sufficient. State information should be carried only where it affects the possible executions of the process. An ACCUMULATOR is used to keep track of running totals of sequences of numbers.

A process to calculate and output f g x from two processes which calculate f and g. CALCg CALCf in x c y cg x out f y from input x may be constructed CALCg CALCf The composition of f and g may be calculated by the parallel combination of CALC g and CALCf . The output of CALCg is connected to the input of CALCf , resulting in a pipeline of two processes which together compute f g x from input x. 3. A parallel combination of processes is itself a process, with an alphabet and a range of possible executions.

If NAMES is the set of all the people’s names, then the alphabet and behaviour of a particular person may be described as follows: An PERSONn PRESENTn enter n leave n meeting enter n PRESENTn leave n PERSONn meeting PRESENTn The situation is then described as GROUP n NAMES An PERSONn The event meeting is in the alphabet of all the components, so it can occur when they are all able to perform it. This can only be when enter n has occurred for all n NAMES without a ALPHABETIZED PARALLEL P c P c c P c cn Pn 39 cn Fig.

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