--%>
Assignment Help - homework help

Modeling Language for SPIN-Promela

Modeling Language: The modeling language used for SPIN is called Promela (Process Meta Language). In fact, the name SPIN stands for Simple Promela Interpreter. Promela is a powerful C-like specification language with a variety of synchronization primitives that enables construction of models of distributed systems. Promela is a guarded command language for specifying possibly non-deterministic system behaviors in a distributed system design. It allows for the dynamic creation of concurrent processes which communicate synchronously or asynchronously via message channels.

For example, the following Promela specification describes two processes P and Q that synchronize over a critical region.

2110_promela1.jpg

A Promela model consists of declarations of types, channels, variables, and processes, as well as facilities for initializing the processes. For example,

2359_promela2.jpg

A model consists of a set of concurrent processes, each in turn consisting of a set of atomic guarded actions or transitions. An action whose guard is true is called enabled and can be executed; otherwise, it is disabled and cannot be executed. Actions are not really executed concurrently; rather, they are non-deterministically interleaved, and this is used to model concurrency. Also processes do not have to terminate, which is useful when modeling reactive systems.

   Related Questions in Programming Languages

  • Q : What is a Sub class Sub class : It is a

    Sub class: It is a class which extends its super class. The sub-class inherits all the members of its super class. All Java classes are the sub-classes of Object class, which is at the root of inheritance hierarchy.

    		•
  • Q : Aggregation and containment in the

    Illustrate the basic difference between Aggregation and containment in the Programming?

    		•
  • Q : Explain the steps to design product If

    If not in production, how far did you obey the design and why did not you notice it in production?

    		•
  • Q : What do you mean by java AWT What do

    What do you mean by the term java AWT? Describe in brief.

    		•
  • Q : Explain VeriSoft VeriSoft (Godefroid,

    VeriSoft (Godefroid, 2005) is a model checker for C and C++; other languages can be used, but components in other languages are treated as black boxes. VeriSoft has been used to find defects in very large telecommunications programs (Chandra, Godefroi

    		•
  • Q : Explain Try statement Try statement :

    Try statement: The try statement performs as an exception handler - a position where exception objects are caught and dealt with. In its most common form, it comprises of a try clause, one or more catch clauses and the finally clause.

    		•
  • Q : Fact table and dimension table describe

    describe the foreign key in fact table and dimension table

    		•
  • Q : What is SLAM SLAM is a Microsoft

    SLAM is a Microsoft project that blurs the line between static analysis and model checking and deductive reasoning. The main goal of SLAM is to check temporal safety properties of C programs (it actually checks that a program correctly uses the interf

    		•
  • Q : Define TCP endpoint TCP endpoint : It

    TCP endpoint: It is the combination of an IP address and Transmission Control Protocol (abbreviated as TCP) port number.

    		•
  • Q : Explain the reason to not carry on

    Explain the reason to not carry on extending HTML.

    		•