The Use of a Persistent Language in the Implementation of a Process Support System (1992)
| Venue: | ICL Technical Journal |
| Citations: | 3 - 1 self |
BibTeX
@ARTICLE{Greenwood92theuse,
author = {Mark Greenwood and R. Mark Greenwood and Michael R. Guy and Michael R. Guy and D. John and D. John and K. Robinson and K. Robinson},
title = {The Use of a Persistent Language in the Implementation of a Process Support System},
journal = {ICL Technical Journal},
year = {1992},
volume = {8},
pages = {108--130}
}
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Abstract
This paper describes how a persistent language, PS-algol, was exploited to implement a process support system. The concepts of persistence are explained, together with other attributes of PS-algol which add value to it. These include first class procedures, the ability for a PS-algol program to change itself by means of the callable compiler, and the universal pointer type which permits flexible binding. The process support system PSS supports the enactment of process models by executing process programs written in the language PML. The central feature of PML is the role. This is an object which communicates with other roles via interactions, or messages. The central component of PSS is a process control engine which supports the compilation and execution of programs written in PML. Roles are persistent processes and are represented as (first class) PS-algol procedures. Interactions are persistent messages which are held in the working data of a persistent scheduler. The PML of a role ...
