Accession Number : ADA294848

Title :   Distributed Ada Programs on Heterogeneous Systems.

Descriptive Note : Final rept.,

Corporate Author : NAVAL UNDERWATER SYSTEMS CENTER NEWPORT RI

Personal Author(s) : Stevens, B. W.

PDF Url : ADA294848

Report Date : 20 MAR 1991

Pagination or Media Count : 61

Abstract : This study investigated distributed applications written in the Ada programming language, in particular, the applications that are implemented on systems dissimilar in underlying hardware architecture and operating systems that require the exchange of data and control. The approach presented in this report rejects the suggestion of modifying both the Ada runtime environment and the Ada language itself to achieve distribution of real-time applications. Distribution can be achieved in the spirit of Ada without use of Ada's tasking features, through use of well-defined standard network or backplane interfaces through other Ada features such as packages and subprograms. The Ada programming language is mandated as the single high-order language used in implementing systems currently being delivered to the Department of Defense (DoD). Many of these systems are presently under development and are distributed in nature. The Ada programming language contains an abstract feature known as a task, which could lend itself to distribution.

Descriptors :   *DISTRIBUTED DATA PROCESSING, *HETEROGENEITY, *SYSTEMS APPROACH, *ADA PROGRAMMING LANGUAGE, DEPARTMENT OF DEFENSE, INFORMATION EXCHANGE, REAL TIME, MODIFICATION, COMPUTER ARCHITECTURE, OPERATING SYSTEMS(COMPUTERS), COMPUTER NETWORKS, HIGH LEVEL LANGUAGES.

Subject Categories : Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE