--%>
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 : Define Unbounded repetition Unbounded

    Unbounded repetition: The repetition where statements in a loop's body are executed an arbitrary number of times, according to the consequences of the statements in the loop's body. All of the loop control structures in the Java offer for unbounded re

    		•
  • Q : Write a program using simple loop

    Objective:  The purpose of this problem is to gain experience with the principles necessary to write a program using simple loop, decision processing, counters and accumulators Save the Barns, a bi-partisan po

    		•
  • Q : Overloading and overriding in the

    Illustrate the difference between overloading and overriding in the programming language?

    		•
  • Q : Define the term Catching exceptions

    Catching exceptions: Exceptions are caught in the catch clause of the try statement. Catching an exception provides the program a chance to recover from the trouble or attempt a repair for whatsoever caused it.

    		•
  • Q : Define Method header Method header : It

    Method header: It is the header of a method, comprising of the method name, its outcome type, formal arguments and any exceptions thrown. Also termed as a method signature.

    		•
  • Q : Explain the CPU scheduling decisions

    Explain the CPU scheduling decisions.

    		•
  • Q : Define Octal Octal : Number

    Octal: Number representation of octal is base 8. In base 8, simply the digits 0 to 7 are employed. Digit positions symbolize successive powers of 8.

    		•
  • Q : Explain Switch statement Switch

    Switch statement: It is a selection statement in which the value of an arithmetic expression {expression!arithmetic} is compared for the match alongside different case labels. When no match is found, the optional default label is chosen For example:

    		•
  • Q : Reads and writes functions To

    		•
  • Q : Problem on COBOL source code errors

    There are many errors in the following COBOL source code. Identify the errors and rewrite the program so that it contains no errors:IDENTIFICATION DIVISION   (Full stop required)PROGRAM ID. ERRORS-EXAMPLE.DATA DIVISION    (Fu

    		•