High Level Language Concepts for Distributed Real-Time Programming Part I : Communication

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A new high level language concept for programming distributed real-time systems is proposed. The distributed program is a collection of processes, concurrently executing in different nodes. The concept is based on special type distributed variables, which support three main communication models. The asynchronous model allows for nonblocking reading and writing. The synchronized model is realized through buffered distributed variables synchronizing reading and writing depending on data and buffer space availability. Zero buffering allows for pure synchronous communication. In the broadcasting model the distributed variables possess buffers for all linked processes. Operations properties are indivisibility, atomicity, and timeout. Distributed structures, containing distributed variables as fields are proposed as general extension. Access to distributed structures in allowed via external declarations and indirectly through special type distributed pointer variables. Two high level basic operations for read and write multiple distributed structures are defined, which correspond to a multivariable distributed assignment. Operators for linking and unlinking to broadcast variables and boolean functions to test data and free buffer space availability are also provided. The usefulness and expressive power of the proposed concepts are illustrated by solutions of several programming problems and modeling other languages mechanisms and communication constructs.
東海大学の論文

High Level Language Concepts for Distributed Real-Time Programming Part I : Communication

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