C*

This article is about the programming language. For the DBMS, see Apache Cassandra. For algebra, see C*-algebra. For the symbols used on flags and emblems, see Star and crescent. For the rocket propulsion term, see Characteristic velocity. For astronomical object type, see star cluster. For the goth festival, see Convergence (goth festival).

C* (or C-star) is a data-parallel superset of ANSI C with synchronous semantics.

C*
Paradigm	multi-paradigm: imperative, parallel
Designed by	Thinking Machines
Developer	Thinking Machines
First appeared	1987
Stable release	6.x (August 27, 1993 (1993-08-27)) / August 27, 1993 (1993-08-27)
Typing discipline	static, weak, manifest
OS	Connection Machine
Filename extensions	.cs
Influenced by
ANSI C, *Lisp
Influenced
Dataparallel-C

History

It was developed in 1987 as an alternative language to *Lisp and CM-Fortran for the Connection Machine CM-2 and above. The language C* adds to C a "domain" data type and a selection statement for parallel execution in domains.

For the CM-2 models the C* compiler translated the code into serial C, calling PARIS (Parallel Instruction Set) functions, and passed the resulting code to the front end computer's native compiler. The resulting executables were executed on the front end computer with PARIS calls being executed on the Connection Machine.

On the CM-5 and CM-5E parallel C* Code was executed in a SIMD style fashion on processing elements, whereas serial code was executed on the PM (Partition Manager) Node, with the PM acting as a "front end" if directly compared to a CM-2. The latest version of C* as of 27 August 1993 is 6.x. An unimplemented language dubbed "Parallel C" (not to be confused with Unified Parallel C) influenced the design of C*. Dataparallel-C was based on C*.