Write a pseudo code to find sum of two functions, Computer Engineering

Assignment Help:

Q. Write a pseudo code to find sum of two functions?

Let's write a pseudo code to find sum of two functions f(A) + f(B). In first algorithm we will not use locking.

Process A                                Process B

 sum = 0                                           :

    :                                                   :

  fork B                                     sum = sum+ f(B)

   :                                                   :

 sum = sum + f(A)                         end B

    :

    join B   

   :

 end A

If process A executes statement sum = sum + f(A) in addition writes results in main memory followed by computation of sum by process B then we attain correct result however consider case when B executes statement sum = sum + f(B) before process A can write result in the main memory. Then sum comprises only f(B) that is incorrect. To avoid such variation we use locking.  

Process A                                Process B

 sum = 0                                           :

    :                                                   :

    :                                                  lock sum               

  fork B                                     sum = sum + f(B)

   :                                                   unlock sum

  lock sum                                        :

 sum = sum + f(A)                         end B

unlock sum 

   :

    join B   

   :

 end A

In this case every time a process obtains sum variable it locks it sothat no other process can access that particular variable that guarantees consistency in results.


Related Discussions:- Write a pseudo code to find sum of two functions

Non-repudiation achieved in designing e-cash based system, How can non-repu...

How can non-repudiation be achieved into designing e-cash based system? E-cash is fundamentally an online solution. The buyer should validate the coins by the issuer so as to g

Write your array of text into file, Part I: 1. The program starts by prin...

Part I: 1. The program starts by printing your initial with an end sign ">". For example, "cjx >"; 2. Then, you can type in the following "vi filename". For example, "vi myp.c

Design an or to and gates combinational network, Q. Design an OR to AND gat...

Q. Design an OR to AND gates combinational network for the following Boolean expression:   ABCD + A'BC'D + A'BC'D' + A'BCD + (A'B'C'D' + AB'CD) Two terms in parenthesis are Don

Explain what logic gets synthesized , What logic gets synthesized when I us...

What logic gets synthesized when I use an integer instead of a reg variable as a storage element? Is use of integer recommended? An  integer  can  take  place  of  a  reg  as

Subtract two number by using 1's complement, Subtract the given number usin...

Subtract the given number using 1's complement 11011 - 11001 Ans. 11011 - 11001 = X - Y                             X =    11011  1's complement of Y =    00110

Explain the operation of JK flip flop when all inputs are 0, Write the trut...

Write the truth table for a clocked J-K flip-flop that is triggered by the positive-going edge of the clock signal. Explain the operation of this flip-flop for the following condit

What is a container class, What are the types of container classes in C++? ...

What are the types of container classes in C++?  Ans) A container class is a class that is used to hold objects in memory/external storage. A container class behaves as a ge

Higher order predicate logic, Higher Order Predicate Logic : In the v...

Higher Order Predicate Logic : In the very first order predicate logic, we are only allowed to quantify over objects. If we are considered to allow ourselves to quantify over

Appropriate problems for ann learning , Appropriate Problems for ANN learni...

Appropriate Problems for ANN learning - artificial intelligence-  As we did for decision trees, it is essential to know when ANNs are the correct representation scheme for the

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd