--%>
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 : What is Static initializer Static

    Static initializer: An initializer prefixed with ‘static’ reserved word. The static initializer is stated outside the methods of its enclosing class, and might access only the static fields and methods of its enclosing class.

    		•
  • Q : Define the term Punctuation Define the

    Define the term Punctuation: Symbols like commas and semicolons that a compiler employs to understand the structure of the program.

    		•
  • Q : Define the term SOAP Define the term

    Define the term SOAP.

    		•
  • Q : Define the term Boolean Boolean : It is

    Boolean: It is one of the Java's primitive types. The Boolean type has merely two values: true and false.

    		•
  • Q : Describe Method Method : The portion of

    Method: The portion of a class definition which implements some of the behavior of objects of the class. The body of the method includes declarations of local variables and statements to execute the behavior. The method receives input through its argu

    		•
  • Q : Explain the Automated Software testing

    Explain the Automated Software testing life cycle.

    		•
  • Q : Explain Conditional operator

    Conditional operator: It is an operator taking three operands that is, a ternary operator. The conditional operator (?:) is employed in the form bexpr ? expr1 : expr2

    Q : Write a program that enters some text

    Write a program that enters some text into a char string called char text[100] and does the following: a) Calls a function called void vowels(char text[]) that prints out how many times each vowel (a/A, e/E, I/i, O/o, U/u) was foun

    		•
  • Q : Define Applet Applet : The Applets are

    Applet: The Applets are Java programs based on the Applet or JApplet classes. They are closely related with the capability to give active content within the Web pages. They have numerous features that differentiate them from ordinary Java graphical ap

    		•
  • Q : State the term UDDI State the term UDDI?

    State the term UDDI?

    		•