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

Compiler designin liliting instruction, Ravi is a newbie to the programming...

Ravi is a newbie to the programming and while learning the programming language he came to know the following rules:

Prepare invoice ocr and document management, Project Description: We are...

Project Description: We are seeking online invoice OCR solution. That will help us to automate accounts payable function. User should be able to use the offered pdf file or s

Program is to reverse the names stored in an array pointer, Program is to r...

Program is to reverse the names stored in an array pointer: Program is to reverse the 6 names stored in an array pointer as name[] void main()   {  clrscr();  char

Make qtav videoplayer simple integrateable for application, Make QtAV Video...

Make QtAV Videoplayer simple integrateable for Qt Applications Project Description: I'm preparing an application for Windows and Mac using QtCreator. I want a videoplayer

Exceptions handling in cpp, Exceptions. Your SVector class should throw fou...

Exceptions. Your SVector class should throw four exceptions: 3.1. If the constructor size is invalid, then it will just allow the implicit STL bad_alloc exception to pass up to mai

Structure, Write a function that calculates the number of elapsed days betw...

Write a function that calculates the number of elapsed days between two dates. For example the days between Feb 3, 1970 and June 21, 1980? Becareful for the Leap year

Describe processing an array, Describe Processing an array? The Single ...

Describe Processing an array? The Single operations which involve complete arrays are not permitted in C language. therefore if a and b are similar arrays (for example same dim

Explain object conversions, Object Conversions Just like initialization...

Object Conversions Just like initialization, conversions are also done automatically when an object of a derived class is assigned to an object of the base class. Though, the c

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