--%>
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 Stream class Stream class : An

    Stream class: An input stream class is one which delivers data from its source (frequently the file system as a series of bytes. Likewise, an output stream class will write byte-level data. The stream classes must be contrasted with the operation of r

    		•
  • Q : What is Bit Bit : It is a binary digit

    Bit: It is a binary digit that can take on two possible values: 0 and 1. The bits are basic building block of both data and programs. Computers regularly shift data around in multiples of eight-bit units (that is, bytes for the sake of effectiveness).

    		•
  • 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 : When does a name clash take place in

    When does a name clash take place in programming?

    		•
  • Q : What is MIME MIME : Multipurpose

    MIME: Multipurpose Internet Mail Extensions (abbreviated as MIME) are rules which make it possible to utilize electronic mail to send content other than the simple text.

    		•
  • Q : How class can be prevented from

    How class can be prevented from inheriting further?

    		•
  • Q : Define way of kernel object outlive

    Explain the way of the kernel object outlive the process which created it.

    		•
  • Q : Define Well-known port Well-known port

    Well-known port: It is a port number at which a server provides a familiar service. For example, 80 is well-known port number for the servers employing the HyperText Transfer Protocol (abbreviated as HTTP).

    		•
  • Q : Explain State State : The objects are

    State: The objects are said to possess state. The present state of an object is symbolized by the joint values of its attributes. Protecting the state of an object from unsuitable inspection or modification is a significant aspect of class design and

    		•
  • Q : What is Pattern Pattern : It is a

    Pattern: It is a recurring theme in class usage or design. Interfaces like Iterator encapsulate a pattern of admission to the items in a collection, whereas freeing the client from the requirement to know details of the way in which the collection is

    		•