Download Advances and Innovations in Systems, Computing Sciences and by Khaled Elleithy PDF

By Khaled Elleithy

This ebook encompasses a set of conscientiously reviewed world-class manuscripts addressing and detailing state of the art study initiatives within the components of Computing Sciences, software program Engineering and platforms. The ebook offers chosen papers from the convention lawsuits of the foreign convention on platforms, Computing Sciences and software program Engineering (SCSS 2006). All points of the convention have been controlled on-line.

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Knuth’s algorithm [10], Lamport’s algorithm [13], and Peterson’s algorithm [14] are three widely studied in concurrent programming and operating systems contexts. Joung refined Knuth’s algorithm and used it as ME component to design his room synchronization algorithm [8]. I. INTRODUCTION A. Background Mutual exclusion and concurrency are two fundamental issues in distributed computing. Mutual exclusion problem is well known for more than four decades since it was posed as early as 1962 [4]. The problem is to basically ensure consistency when accessing a shared resource.

It relies on the use of MOF (Meta Object Facility) meta-models and UML (Unified Modelling Language) models for any step of the application life cycle. This approach depends on the definition of : • a specification model called Computational Independent Model or CIM, • a conception model called Platform Independent Model or PIM, • an implementation model called Platform Specific Model or PSM, • a set of model transformations (also called mappings). The control components are designed using the UML language.

C. Algorithm Combining the ME and CCE components described above, we get the first room synchronization algorithm given in Figure 4, and we refer it as RSA. The basic idea behind the algorithm is that a competing process first enters a stage based on the current competition that it observes. Then it follows the logic used in ME component, given in Figure 3, when it observes a process in a higher stage interested in different forum. Otherwise, it moves up in the stages towards CS as long as it does not see any process at a higher stage interested in different forum.

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