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A Circus Semantics for Ravenscar Protected Objects
[chapter]
2003
Lecture Notes in Computer Science
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We give a semantics to protected objects using Circus, a combination of Z and CSP, and prove several important properties; this is the first time that these properties have been verified. ...
A central feature of Ravenscar is the use of protected objects to ensure mutually exclusive access to shared data. ...
Thanks are also due to Alan Burns and Ana Cavalcanti for their insightful comments and useful discussions. ...
doi:10.1007/978-3-540-45236-2_34
fatcat:lmlswh6cober7o6emlgeqdthta
FPGAs in critical hardware/software systems
2003
Proceedings of the 2003 ACM/SIGDA eleventh international symposium on Field programmable gate arrays - FPGA '03
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Newer standards now make similar requirements for safety-related electronic hardware, such as FPGAs, in these systems. ...
We pay particular attention to the development and analysis of high-level language programs for FPGAs designed to interact with conventional software. ...
Channels between threads could be modelled using Ravenscar protected objects. ...
doi:10.1145/611817.611871
dblp:conf/fpga/HiltonTH03
fatcat:nmkyo47eszfh3gf63xdkthvv2m
Safety-Critical Java: level 2 in practice
2016
Concurrency and Computation
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To illustrate the benefit of our changes, we present excerpts from a formal model of SCJ Level~2 written in Circus, a state-rich process algebra for refinement. ...
Safety Critical Java (SCJ) is a profile of the Real-Time Specification for Java that brings to the safety-critical industry the possibility of using Java. ...
Wellings is a member of the Java Community Process JSR 302 Expert Group, which is tasked with developing the Safety-Critical Java Specification. ...
doi:10.1002/cpe.3951
fatcat:5xh6rc4denagtjo4cowssqbvze
Circus Models for Safety-Critical Java Programs
2013
Computer journal
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Our modelling language is part of the Circus family; at the core, we have Z, CSP, and Morgan's calculus, but we also use object-oriented and timed constructs from the OhCircus and Circus Time variants. ...
Safety-Critical Java (SCJ) is a restriction of the Real-Time Specification for Java to support the development and certification of safety-critical applications. ...
ACKNOWLEDGEMENTS We are grateful to Chris Marriott, Kun Wei, and Jim Woodcock for useful discussions of our models. This work is funded by the EPSRC grant EP/H017461/1. ...
doi:10.1093/comjnl/bxt060
fatcat:t4izhlvz2jhy3jdsqubux4sypm
Java in the Safety-Critical Domain
[chapter]
2017
Lecture Notes in Computer Science
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For modelling, we use the Circus family of notations, which combine Z, CSP, Timed CSP, and object orientation. ...
SCJ Level 1 corresponds roughly to the Ravenscar profile for Ada [6] . We also present here a technique for verification by refinement of SCJ Level 1 programs [12] . ...
So, what we have is a Circus semantics for the SCJ paradigm, (very much as explained in [50] for SCJ itself). ...
doi:10.1007/978-3-319-56841-6_4
fatcat:6h4qh74t5jgpnfkdachghf73we
High integrity hardware-software codesign
2004
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This process incorporates the use of Synchronous Receptive Process Theory as a semantic basis for specifying and proving properties of programs executing on PLDs, and extends the use of SPARK Ada from ...
We propose a process for developing a system incorporating software and PLDs, suitable for safety critical systems of the highest levels of integrity. ...
We produced a detailed mechanism for asynchronous transfer of data between a software SPARK program and the SPARK interpreter. ...
doi:10.21954/ou.ro.0000f5b2
fatcat:2jmjhbz4kjet7cgpfdkjbplg3q