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

What are pre-processor directives, What are pre-processor directives? -...

What are pre-processor directives? - Pre-processor directives are placed at the beginning of a C program. They begin with # symbol. - This is the place, where library files

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

Explain the functions strlen ( ), Question 1 Consider you have to find out...

Question 1 Consider you have to find out average marks of 100 students in a class. Write simple program(s) using different iteration statements to accomplish it Question 2 Expla

Input and output in c++, C++ improves on many of C's features and provides ...

C++ improves on many of C's features and provides object-oriented programming capabilities used for software production, quality and reusability. C++ was developed by Bjarne Strons

Define some features of register storage class in c program, Define some fe...

Define some features of register storage class in c program? The feature of variable defined to be of register type all as follows: Storage - CPU registers Default initia

Define the data type qualifiers in c language, Define the Data Type Qualifi...

Define the Data Type Qualifiers in c Language? 1. const 2. volatile const: The const qualifier is used to tell C that the variable value can't change after initialization.

Pascal programming , 1. The management of a company would like to determine...

1. The management of a company would like to determine the median annual salary of its employees.Write a pascal program that display the number of employees and their median salary

Padovan string, padovan string generation till 40

padovan string generation till 40

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