read writers problem, C/C++ Programming

Assignment Help:
Readers Writers with Processes and Threads
Write two programs implementing ``reader pritority readers-writers synchronization'''' on files. One program will use processes, created with fork(), and synchronized with semaphores. The other program will use threads, created with pthread_create(), and synchronized with mutexes and conditions. In the following, the word "process" is used to describe either a process or thread, as appropriate.
Your program will create two readers and two writers. All four will access a common file, named ``SharedFile.'''' This file should contain a single number. The file should be created and given an initial value of 0 before the processes/threads are spawned.
The reader pseudocode:
repeat 20 times:
acquire read lock
read the number from SharedFile
release the read lock
print a message identifying the process, and the value read from SharedFile
sleep for a random period between 100 and 200 msec
The writer pseudocode:
repeat 20 times:
acquire write lock
read the number from SharedFile
increment it by a random value between 1 and 6
write the new value to SharedFile
release the write lock
print a message identifying the process, and the value written to SharedFile
sleep for a random period between 100 and 400 msec
Submit ONLY your C/C++ source code. Be sure to put your name and course in the comment header. The code must run on the "algebra and friends" machines. Use good programming style (comments, indentation, meaningful identifiers, etc.)

Related Discussions:- read writers problem

Assesors, what are assessor. elaborate with clear easy diagrams

what are assessor. elaborate with clear easy diagrams

Volume, how to find the volume of cone , cylinder and sphere ?

how to find the volume of cone , cylinder and sphere ?

Programming an odds betting website, Programming an odds betting website ...

Programming an odds betting website Project Description: We want someone to program a odds betting website, Require someone with experience and skills! Skills required are

AREAS, Write a program to find the area under the curve y = f(x) between x ...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Addition in a existing c++ unification algorithm, Addition in a existing c+...

Addition in a existing c++ unification algorithm Project Description: I have a existing code for a algorithm and need to add two modules into it, it is a unification algorith

Lennie, Lennie McPherson, proprietor of Lennie''''s Bail Bonds, needs to ca...

Lennie McPherson, proprietor of Lennie''''s Bail Bonds, needs to calculate the amount due for setting the bail. Lennie requires something of value as collateral, and his fee is 10%

Area under the curve, Write a program to find the area under the curve y ...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Write a code to implement the base and derived class, Study the given hiera...

Study the given hierarchical class diagram and additional information, and answer the questions that follow: Sale Company: string unitPrice: double

C program for create matrices , C Program for CREATE MATRICES #include...

C Program for CREATE MATRICES #include stdio.h> #include conio.h> void main() {           int a[10][10],rw=0,clm=0,i=0,j=0;           char s=' ';           c

Explain the special pointer this, The Special Pointer 'this' When vario...

The Special Pointer 'this' When various instances of a class come into existence, it naturally follows that each instance has its own copy of member variables. If this were not

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