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User-Level Shared Variables (In a Hierarchical Control Environment)

Published

Author(s)

Don E. Libes

Abstract

We have implemented a shared variable system for UNIX 4.2BSD that emulates a shared or common memory. This system is all user level code and requires no kernel modifications. It is accessible from a variety of languages. This shared memory system provides its service transparently to remote hosts across a local-area network. This system is being used in a real application--an automated factory. Shared variables are an appropriate communication paradigm in a real-time environment (in comparison to message passing or pipes).
Proceedings Title
Proceedings of the 1985 USENIX Conference

Keywords

UNIX, shared variable system, memory, communication, real-time environment

Citation

Libes, D. (1985), User-Level Shared Variables (In a Hierarchical Control Environment), Proceedings of the 1985 USENIX Conference (Accessed April 23, 2024)
Created January 1, 1985, Updated February 17, 2017