Implementing Concurrent C

Concurrent C (C++) is a parallel superset of C (C++). Versions of Concurrent C have now been implemented for a variety of uniprocessors and multiprocessors. We first implemented a uniprocessor version of Concurrent C correctly anticipating that it would be relatively easy to extend the uniprocessor implementation to run on multiprocessors. Concurrent C is translated to C. The generated C code contains calls to the C library implementing the Concurrent C run-time system. This paper describes the ‘hard core’ details of the Concurrent C implementation: the specifics of process states, the data structures used, the library functions, and the C code generated for various Concurrent C constructs. We also give an overview of the Concurrent C facilities and of the uniprocessor, distributed and shared-memory multiprocessor implementations.