Ease (programming language): Difference between revisions

Revision as of 23:07, 17 September 2017

Revision as of 06:50, 12 June 2018

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'''Ease''' is a general purpose [[parallel computing|parallel]] [[programming language]],. It is designed by [[Steven Ericsson-Zenith, a researcher at [[Yale University]], ofthe Institute for Advanced Science & Engineering in Silicon Valley, California, the [[YaleMines ParisTech|Ecole Nationale Supérieure des Mines de Paris]], and the [[Pierre and Marie Curie University]], the science department of the [[Sorbonne]].<ref>{{cite Itbook |last=Ericsson-Zenith |first=Steven |date=1 July 2011 |orig-year=July 1992 |title=Process Interaction Models |url=https://www.amazon.com/Process-Interaction-Models-Steven-Ericsson-Zenith/dp/1463777914/ |___location=Seattle, Washington, U.S. |website=Amazon |publisher=CreateSpace Independent Publishing Platform |isbn=1463777914 |access-date=2018-06-12}}</ref> Ease combines the process constructs of [[Communicatingcommunicating sequential processes|CSP]] (CSP) with logically shared data structures called ''contexts''. Contexts are [[Parallel computing|parallel]] data types that are constructed by processes and provide a way for processes to interact.

The language includes two process constructors.

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::<math>\parallel P() \parallel Q() ;</math>

If one process finishes before the other, then it will wait until the other processes are finished.

A ''subordination'' creates a process that shares the ''contexts'' that are in scope when created and finishes when complete (it does not wait for other processes) and is written:

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There are four functions upon contexts:

* '''read''' ( context, variable) ),– copies a value from the shared ''context'' to the ''variable''.

* '''write''' ( context, expression) ),– copies the value of ''expression'' to the shared ''context''.

* '''put''' ( context, name) ),– moves the value bound to ''name'' to the shared ''context''. The value of ''name'' is subsequently ''undefined''.

* '''get''' ( context, name) ),– moves a value from ''context'' and binds it to ''name''. The value is removed from the context.

Context types are ''Singletons'', ''Bags'' or ''Streams'' and can be subscripted arrays.

Ease has a ''[[Semiotics|semiotic]] definition.''. This means that it takes intoaccounts accountfor the effect the language has on the programmer and how they develop algorithms. The language was designed to ''ease'' the developmentdeveloping of parallel programs.

== References ==

{{Reflist}}

* [https://www.amazon.com/Process-Interaction-Models-Steven-Ericsson-Zenith/dp/1463777914/ Steven Ericsson-Zenith, "Process Interaction Models" (The Ease Language Specification)]

* [https://books.google.com/books?id=8GssNAAACAAJ John Redman, An Implementation of the Ease Programming Language, University of Western Australia, 1991]

* [http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=590304 T.H. MacKenzie, T.I. Dix, "A distributed memory multiprocessor implementation of C-with-Ease," IEEE International Conference on Parallel and Distributed Systems, 2002]

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[[Category:Concurrent programming languages]]

[[Category:Concurrency control]]

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