--%>
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 : Define the term New operator Define the

    Define the term New operator: The operator employed to generate instances {instance} of a class.

    		•
  • Q : Why is Java pure object oriented

    Explain the reasons that Java is pure object oriented programming language.

    		•
  • Q : State the term tombstone lifetime

    State the term tombstone lifetime attribute?

    		•
  • Q : State the term XLL State the term XLL?

    State the term XLL? Answer: The specification of XML Link Language has XPointer or XLink.

    		•
  • Q : Explain Abstract Windowing Toolkit

    Abstract Windowing Toolkit: The Abstract Windowing Toolkit (AWT) offers a collection of classes which simplify the creation of applications with the GUI (graphical user interfaces). Such are to be found in the java.awt packages. Included are classes f

    		•
  • Q : Define the term Local inner class and

    Define the term Local inner class and Local variable: Local inner class: It is an inner class stated in a method. Local variable: It is a variable defined within

    		•
  • Q : State-space Reduction in Promela model

    State-space Reduction: Two language statements are used to reduce the number of states in a Promela model: atomic and d-step. 1553_state</span></p> </div> <!-- /comment-box --> </li> </td> </tr><tr> <td> <li> <div class=

    Q : Explain Information hiding Information

    Information hiding: The practice of making sure that only as much information is exposed regarding the implementation of a class as is strictly needed. Hiding needless knowledge of implementation makes it not as much of likely that other classes will

    		•
  • Q : Protocol stack of XML Web Services

    Explain the protocol stack of XML Web Services.

    		•
  • Q : Define Continue statement Continue

    Continue statement: A statement which might only be employed within the body of a loop. In case of a while loop or do loop, control passes instantly to the loop's terminating test. In case of a for loop, the control passes to the post-body update expr

    		•