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

C++ program, Receive 3 numbers and display them in ascending order from sma...

Receive 3 numbers and display them in ascending order from smallest to largest ed#

Pointer, void main() { int *p, *q, i ; p=(int*)100; q=(int*)200; i=q-p; pr...

void main() { int *p, *q, i ; p=(int*)100; q=(int*)200; i=q-p; printf("%d",i); } }

Scrape a site and save as csv, Scrape a site and save as csv Project Des...

Scrape a site and save as csv Project Description: I want a programmer to create scraping software. I'll want every page scraped of name, job title, company, and url. There a

Explain the unary minus operator, Unary Minus Operator( Negation) This ...

Unary Minus Operator( Negation) This operand can be used to negate the value of a variable. It is also used to state a negative number, here a minus(-) sign is prefixed to the

Asset pricing project, In the final project assignment you are asked to dev...

In the final project assignment you are asked to develop an OOP C++ class hierarchy for derivative pricing, using the binomial tree and Black-Scholes option pricing methods. You wi

C++ programming, I need help programing this... In this exercise, you will ...

I need help programing this... In this exercise, you will create a program for the sales manager at Computer Haven, a small business that offers motivational seminars to local comp

Algorithm , write an algorithm to swap values without using third variable

write an algorithm to swap values without using third variable

Super ASCII string cost, A string S is said to be "Super ASCII", if it cont...

A string S is said to be "Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''a''-''z'') and the asci

C++, 2. Write C++ code for calculating the time table

2. Write C++ code for calculating the time table

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