Distributed, Modular HTL

Abstract—The Hierarchical Timing Language (HTL) is a realtime coordination language for distributed control systems. HTL programs must be checked for well-formedness, race freedom, transmission safety (schedulability of inter-host communication), and time safety (schedulability of host computation). We present r abstract syntax and semantics for HTL, modular checks of well-formedness, race freedom, and transmission safety, and modular code distribution. Our contributions here complement previous results on HTL time safety and modular code generation. Modularity in HTL can be utilized in easy program composition as well as fast program analysis and code generation, but also in so-called runtime patching, where program components may be modified at runtime.

• Type: Conference
• Year: 2009
• Where: RTSS
• Authors: Thomas A. Henzinger, Christoph M. Kirsch, Eduardo R. B. Marques, Ana Sokolova
• Keywords: Applied Computing, HTL Time Safety, Race Freedom, RTSS 2009, Transmission Safety