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Ritson, Carl G.; Barnes, Frederick R.M. (2007)
Publisher: IOS Press
Languages: English
Types: Unknown
Subjects: QA76
Operating-systems are the core software component of many modern computer systems, ranging from small specialised embedded systems through to large distributed operating-systems. The demands placed upon these systems are increasingly complex, in particular the need to handle concurrency: to exploit increasingly parallel (multicore) hardware; support increasing numbers of user and system processes; and to take advantage of increasingly distributed and decentralised systems. The languages and designs that existing operating-systems employ provide little support for concurrency, leading to unmanageable programming complexities and ultimately errors in the resulting systems; hard to detect, hard to remove, and almost impossible to prove correct. Implemented in occam-pi, a CSP derived language that provides guarantees of freedom from race-hazards and aliasing error, the RMoX operating-system represents a novel approach to operating-systems, utilising concurrency at all levels to simplify design and implementation. This paper presents the USB (universal serial bus) devicedriver infrastructure used in the RMoX system, demonstrating that a highly concurrent process-orientated approach to device-driver design and implementation is feasible, efficient and results in systems that are reliable, secure and scalable.

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