--%>
Assignment Help - homework help

Networking, Distributed and Concurrent Programming

Homework Assignment : A Barbershop Problem Due: November 20, 2012 In this assignment, you are asked to write a multithreading problem to simulate the barbershop problem, which is a classical synchronization problem. The problem is taken from William Stallings's Operating Systems: Internals and Design Principles, 3rd Edition, 1998. Barber problem: Orchestrating activities in a barbershop 1. 3 chairs, 3 barbers, 1 cash register, waiting area includes 4 customers on a sofa, plus additional standing room for 7 customers. 2. A customer : • Will not enter the shop if it is filled to capacity • Takes a seat on the sofa, or stands if sofa is filled • When a barber is free, the customer waiting longest on sofa is served, the customer standing longest takes up seat on the sofa • When a customer's haircut is finished, any barber can accepted payment but because of the single cash register, only one payment is accepted at a time • Barbers divide their time between cutting hair, accepting payment and sleeping Assume the arrival rate of customers is 1 customer/3 minutes, the haircut speed of three barbers are the same 5 minutes. Initially, all three barbers are sleeping, and there is no guest in the barbershop. The output of your program is the snapshot of the barbershop at a given time (an input parameter of the program), including how many customers in the barbershop, how many are seated, how many are on the barber chairs, current status of three barbers, current status of cashier, and how many customers are dropped. Hints: • You can start from the code included in the slides, and try to solve the remaining problems (slides) step by step. • The interval of your simulation step should not larger than 1 minute. Extra credits: You can get 0.5 extra credit if you can handle the poisson arrival of customers. You can get 0.5 extra if you can handle varied hair cutting speed.

   Related Questions in Programming Languages

  • Q : Explain Test Object Model Define the

    Define the terms Test Object Model, Test Object and Run-Time object?

    		•
  • Q : What is Protected access Protected

    Protected access: Protected access is accessible to a class member prefixed with protected access modifier. This member is accessible to all classes stated within the enclosing package, and any sub-classes expanding the enclosing class.

    		•
  • Q : Differences between primary storage and

    What are the differences between primary storage and secondary storage?

    		•
  • Q : Limit the Use of Pre-processor

    Limit the Use of Pre-processor Directives: The C pre-processor is powerful, but unrestricted use of it can lead to code that is hard to understand and analyze. Limit its use to inclusion of header files and simple macro definitions. Avoid features suc

    		•
  • Q : Explain Synchronized statement

    Synchronized statement: It is a statement in which an object-lock should be obtained for the target object prior to the body of the statement and can be entered. Employed to enclose a critical section in order to save a race hazard.

    		•
  • Q : What is Stack overflow Stack overflow :

    Stack overflow: Stack overflow takes place whenever too many items are pushed onto a stack with a finite or limited capacity.

    		•
  • Q : Explain State State : The objects are

    State: The objects are said to possess state. The present state of an object is symbolized by the joint values of its attributes. Protecting the state of an object from unsuitable inspection or modification is a significant aspect of class design and

    		•
  • Q : What is BLAST in program model checking

    What is BLAST in program model checking: The abbreviation is Berkeley Lazy Abstraction Software Verification Tool (BLAST) is a software model checker for C programs. The main goal of BLAST (BLAST website) is to be able to check that software satisfies

    		•
  • Q : Define the term server-side XPointer

    Define the term server-side XPointer?

    		•
  • Q : Explain myriad of computer systems of

    Explain myriad of computer systems of your target users?

    		•