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- Newsgroups: comp.parallel
- Path: sparky!uunet!gatech!hubcap!fpst
- From: gmt@cs.arizona.edu (Gregg Townsend)
- Subject: Announcing Version 2 of the SR Language
- Message-ID: <1992Aug31.124302.2297@hubcap.clemson.edu>
- Followup-To: poster
- Keywords: concurrent programming language SR
- Sender: fpst@hubcap.clemson.edu (Steve Stevenson)
- Organization: U of Arizona CS Dept, Tucson
- Date: 28 Aug 92 17:28:08 GMT
- Approved: parallel@hubcap.clemson.edu
- Lines: 78
-
-
- SR (Synchronizing Resources) is a language for writing concurrent programs.
- The main language constructs are resources and operations. Resources
- encapsulate processes and variables they share; operations provide the
- primary mechanism for process interaction. SR provides a novel integration
- of the mechanisms for invoking and servicing operations. Consequently, all
- of local and remote procedure call, rendezvous, message passing, dynamic
- process creation, multicast, and semaphores are supported. An overview of
- version 1 of the language and implementation appeared in the January, 1988,
- issue of TOPLAS (ACM Trans. on Prog. Languages and Systems 10, 1, 51-86).
-
- Version 2.0 of SR is now available from The University of Arizona by anonymous
- FTP or by mail. New features include shared global variables and operations,
- circular imports, real numbers and math functions, formatted I/O, a more
- general syntax with fewer special cases, a more robust system with better
- error checking, true multiprocessing when run on a Sequent Symmetry or
- Silicon Graphics Iris, distributed termination detection, and many additional
- enhancements. Version 2.0 is significantly improved over the preliminary
- version, 2.A, that was released in March.
-
- Version 2 is described in detail in the just-published book
-
- Gregory R. Andrews and Ronald A. Olsson
- The SR Programming Language: Concurrency in Practice
- Benjamin/Cummings Publishing Company, 1993
- ISBN 0-8053-0088-0
-
- It is tested on Sun4, Sun3, DECstation, SGI Iris, HP RISC and 9000/300, NeXT,
- and Sequent Symmetry platforms. Code is also included for the DG AViiON,
- IBM RS/6000, DEC VAX, Encore Multimax, Apollo DN, and others.
-
-
- SR has been used at a number of universities and labs for course work and
- research projects involving concurrent programming. It has been used in
- concurrent programming courses to reinforce concepts with small programming
- projects and with larger projects such as experiments with parallel
- algorithms, replicated databases, distributed simulations, and parts of
- distributed operating systems such as file systems and command interpreters.
- SR has also been used as a tool in several masters theses and doctoral
- dissertations to conduct experiments in parallel and distributed programming
- and to implement larger systems such as a system for mixed language
- programming, one for distributed implementation of graph algorithms,
- experiments with load balancing algorithms, and experiments with upcall
- program structures.
-
-
- SR is available by anonymous FTP from cs.arizona.edu. There are two compressed
- tar files; be sure to transfer them in binary (image) mode. The files are:
-
- /sr/sr.tar.Z: The SR programming language, including source code,
- documentation in PostScript and troff form, checkout programs, and
- examples.
-
- /sr/vs.tar.Z: The extended verification suite, needed only if you're
- going to modify the system or port it to a new architecture.
-
- Electronic mail interfaces to FTP are available at BITFTP@PUCC.BITNET (for
- BITNET members) or ftpmail@decwrl.dec.com (for anyone). For details, send
- either server a message with ``help'' in the body.
-
- If you pick up SR by FTP, please send mail to sr-project@cs.arizona.edu to let
- us know. We'll also put you on the INFO-SR mailing list (see below) if you so
- request.
-
- SR is also available by mail on tape, Sun cartridge, or two 1.44 MB diskettes.
- For details and an order blank, contact the SR project at the email address
- above, or call (602) 621-8448, or send a FAX to (602) 621-4246, or write to:
-
- SR Project
- Department of Computer Science
- University of Arizona
- Tucson, AZ 85721
-
- An electronic mailing list is in place for discussing SR topics. You can
- join by sending your email address to info-sr-request@cs.arizona.edu or
- uunet!arizona!sr-project.
-
-
-