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

Palindrome, Problem : Change to palindrome A palindrome is a string that r...

Problem : Change to palindrome A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your ta

Primary data type in cpp, What are  P r im a r y D a t a T y p...

What are  P r im a r y D a t a T y p es? Integer can be defined according to the size of the data and it can be modified further by using keyword unsigned and si

Functions and stack frame, Each function has its own stack frame between %f...

Each function has its own stack frame between %fp and %sp. Let Caller calls Callee. Then Caller's %sp becomes callee's %fp, and callee's %sp set to be a new value (a smaller one be

Change to palindrome, A palindrome is a string that reads the same from bot...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

Algorithm and flowcharts, algorithm to find out all the factors of given po...

algorithm to find out all the factors of given positive integers

State six typical application of primary cells, Normal 0 false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

What does it mean to declare a function as a static, (c) A static member fu...

(c) A static member function can access static member data only, static member functions and functions and data outside the class. A static member function may be called, even whil

Visual basic, a program to accept average, if average is 75 to 85 print it...

a program to accept average, if average is 75 to 85 print it out else bypass using counter. enter and process 5 records

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

write an algorithm to swap values without using third variable

Explanation of break statement, Problem 1. Explain Break and continue s...

Problem 1. Explain Break and continue statements in C++. Explanation of Break statement Explanation of Continue statement 2. Explain concepts of constructors and

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