“System Design and Implementation of BGRAF2” by Kaufman

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    System Design and Implementation of BGRAF2

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Abstract:


    BGRAF2 is a real-time interactive 2D graphics language. Its supporting system contends with an unusual combination of features: timing, events, parallelism, image manipulation, user interaction and procedural structures. This combination creates within the system many unpredictable interrelated tasks competing for execution.

    A BGRAF2 program is compiled into an object module consisting of a sequence of pure code blocks, tasks, and a set of data blocks. The real-time environment is a hierarchical structure, where the highest level is a Scheduler, and the next level is composed of the object module and five additional processors: Graphics Processor, Control Processor, Input-Output Processor, Real-Time Processor and Memory Manager. The Scheduler is an abstract monitor responsible for scheduling tasks in accordance with a multi-level priority from a multi-queue scheme.

References:


    1. Bergman, S. & Kaufman, A. BGRAF2: a real-time interactive graphics language with modular objects and implicit dynamics. Proc. SIGGRAPH’76, Phila. PA (July 1976) 133-138. 
    2. Bergman, S. & Kaufman, A. High-level language for real-time processes. Proc. 12-th Nat’l Conf. on Data Processing, Tel-Aviv (Sept. 1977) 179-189 (in Hebrew).
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    10. Hoare, C.A.R. Monitors: an operating system structuring concept. CACM 17, 10 (Oct. 1974) 549-557. 
    11. Kaufman, A. & Bergman, S. The definition of BGRAF2: a real-time interactive graphic language. Ben-Gurion Univ., Math. Dept., Tech. Rep. MATH-132 (Jan. 1976).
    12. Kaufman, A. Interactive real-time graphics language. Ph.D. Thesis (Aug. 1977), (in Hebrew, English Summary).
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    15. Potel, M.J. An executive for event-driven systems. Quarterly Rep. 49, Univ. of Chicago (May 1976).

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