--%>
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 : Introduction to Programming for

    The purpose of this assignment is to get you started with C++ programming. You'll develop simple programs (with input and output) to solve simple mathematical and engineering problems. 1. Write a program to compute the area A of an

    		•
  • Q : What is Round robin allocation Round

    Round robin allocation: It is an allocation of time slices which repeatedly cycles regarding a set of eligible threads in the fixed order.

    		•
  • Q : What is Variable Variable : It is the

    Variable: It is the memory block of specific size where value can be stored and modified throughout program execution. Example: int x, float y, float amount, char c;

    		•
  • Q : Ways in which Java program is less

    Give two ways in which a Java program is less likely to be compromised than the same program written in C++.

    		•
  • Q : What is Classpath Classpath : The path

    Classpath: The path searched by interpreter and compiler for class definitions. The class path might be set by a command-line argument to either, or through an environment variable.

    		•
  • Q : Explain If-else statement If-else

    If-else statement: It is a control structure employed to select between performing one of two alternative events.     if(boolean-expression){        // Statem

    		•
  • Q : Define the term Case label Case label :

    Case label: The value utilized to select a specific case in a switch statement.

    		•
  • Q : Explain Relative filename Relative

    Relative filename: It is a filename whose full path is associative to some point within a file system tree-frequently the present working folder (that is, directory). For example:   

    		•
  • Q : Define the term Field Define the term

    Define the term Field: Variables stated within a class or interface, exterior of the methods. The fields are members of a class.

    		•
  • Q : Explain the segmentation with paging

    Explain the segmentation with paging.

    		•