--%>
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 : Examples for 8 -16 - 32 bit

    Normal 0 false false

  • Q : Who developed Extensible Hyper-Text

    Who developed Extensible Hyper-Text Markup Language? Answer: XHTML (Extensible Hyper-Text Markup Language) was developed by W3C HTML Working Group along with Steven

    		•
  • Q : Define Object serialization Object

    Object serialization: The writing of an object's contents in such a manner that its state can be restored, either at a later time, or in a different procedure. This can be employed to store objects between runs of a program, or to transfer or shifts o

    		•
  • Q : Business Process Management Describe

    Describe what is Business Process Management (or BPM) in brief.

    		•
  • Q : Explain Wrapper classes Wrapper

    Wrapper classes: The Java's primitive types are not of object types. The wrapper classes are stated in the java.lang package. They comprises of a class for each and every primitive type: Boolean, Byte, Double, Float, Integer, Long & Short and Char

    		•
  • Q : State Cout and Cin Cout: This is an

    Cout: This is an object of ostream_withassign class stated in iostream.h header file

    		•
  • Q : Define Reserved word Reserved word : It

    Reserved word: It is a word reserved for a particular purpose in Java, like: class, int, public, and so forth. These words might not be employed as ordinary identifiers.

    		•
  • Q : Define Double buffering Double

    Double buffering: A graphics method employed to smooth animation. The later version of an image is drawn `at the back the scenes' and then exhibited in its totality whenever the drawing is finished. The supposition is that it will be relatively fast t

    		•
  • Q : Describe Layout manager Layout manager

    Layout manager: The object responsible for sharing the accessible space between multiple components in a graphical container.

    		•
  • Q : Write a function Write a function that

    Write a function that takes an integer value and returns the number with its digits reversed. For example, given 7631, the function should return 1367.