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Modular design for simulation

1988; Wiley; Volume: 18; Issue: 10 Linguagem: Inglês

10.1002/spe.4380181003

1097-024X

Ravi Sharma, Lawrence L. Rose,

Service-Oriented Architecture and Web Services

Abstract This paper presents a modular design approach for the implementation of process‐oriented or event‐oriented discrete systems simulation software. Requirements for such a simulation facility are discussed, to include list processing capabilities, data structuring capabilities, dynamic allocation of data storage, statistics collection and number‐crunching capabilities, and subprograms. Specific focus is placed upon implementing the process view which requires constructs in the language for initiating, controlling and terminating a process. Resource management facilities are also considered, to include a means of defining a resource with its associated resource handler and a set of primitives for requesting, releasing and obtaining status information regarding a resource. HPSIM, an organized collection of modules written in Modula‐2, was designed to facilitate both event‐oriented and process‐oriented discrete systems simulation, Modula‐2 was chosen for its data abstraction facilities, its software engineering capabilities, its execution efficiency, its ability for separate compilation and its implementation of co‐routines. The modeller encapsulates the conceptual model of the system into a software module which is interfaced with the HPSIM modules. The IMPORT statement in Modula‐2 allows the modeller to access any of the routines provided by HPSIM as required. An example involving a single‐server CPU system highlights the process/resource features of HPSIM.