--%>
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 Operating system Operating

    Operating system: The operating system permits a computer's hardware devices to be accessed by the programs. For example, it permits data to be managed on a computer's disks in the form of a file system and it delivers the co-ordinate positions of a m

    		•
  • 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 : Macro definition in C and C++ Macro in

    Macro in C: Macros are defined as single identifier

    		•
  • Q : Explain the way to handle the mapping

    Explain the way to handle the mapping form.

    		•
  • 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 : Define Daemon thread Daemon thread :

    Daemon thread: The daemon threads are non-user threads. They are usually employed to carry out low-priority tasks which must not take priority over the major task of the program. They can be employed to do helpful work whenever all other user threads

    		•
  • Q : What is message queue Describe the

    Describe the message queue?

    		•
  • Q : Define Arithmetic operator Arithmetic

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

    		•
  • Q : Basic Units of CSS Specify the Basic

    Specify the Basic Units of the CSS.

    		•
  • Q : What is validating parser What is

    What is validating parser? Answer: A parser makes sure that an XML document is valid additionally to being well formed.

    		•