--%>
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 : Calculate the summation of 1 to some

    Write two programs to calculate the summation of 1 to some integer n using a function called int summation(int n) a) Using a non recursive solution, with a for(i=1, i<=n; i++) loop and b) using a recursive solution, based on the following conditions summation(n) = summation(n-1

    		•
  • Q : Define Arithmetic operator Arithmetic

    Arithmetic operator: The Operators, like +, -, *, / and %, which generate a numerical outcome, as a part of an arithmetic expression.

    		•
  • Q : Define Livelock Livelock : It is a

    Livelock: It is a situation in which a thread waits to be notified of a condition however, on waking, finds that the other thread has inverted the condition another time. The primary thread is forced to wait again. Whenever this occurs for an indefini

    		•
  • Q : Which is the tool having demand within

    Which is the excellent tool one should learn, which is the tool having demand within the market?

    		•
  • Q : Differentiate between MFC and Win32

    Differentiate between MFC and Win32?

    		•
  • Q : What is an Integer What is an Integer :

    What is an Integer: It is a negative or positive whole number. The primitive types are: short, byte, int and long are utilized to hold integer values in narrower or broader ranges.

    		•
  • Q : Explain Static variable Static variable

    Static variable: It is a static variable defined within a class body. Such a variable fits in to the class as a whole, and is, thus, shared by all objects of the class. The class variable may be employed to define the default value of an instance vari

    		•
  • Q : Define Loop variable Loop variable : A

    Loop variable: A variable employed to control the operation of a loop, like a for loop. Usually, a loop variable will be provided an initial value and it is then incremented after each and every iteration till it passes or reaches a terminating value.

    		•
  • Q : Explain Java Virtual Machine Java

    Java Virtual Machine (JVM): It is an idealized machine whose instruction set comprises of bytecodes. Java program is compiled to an equal bytecode form and performed on an interpreter that implements the JVM.

    		•
  • Q : What is Server Server : Something which

    Server: Something which gives a service. The Web server delivers resources to its clients, for example. Whenever the server is an object, this is the recipient of messages from its object clients.

    		•