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

Program to find shortest path between two nodes, Ques.Implement a c/c++ pro...

Ques.Implement a c/c++ program to find a shortest path between two nodes in a network?network should be taken as an adjacency matrix.

C program to search for a given character in a string, Program is to search...

Program is to search for a given character in a string: Program is to search for a given character in a string and print point of match char *stsearch(char *string, char sea

What is the use of pear in php, What is the use of PEAR in php? PEAR is...

What is the use of PEAR in php? PEAR is termed as PHP Extension and Application Repository. It provides structured library to PHP users and also gives provision for package mai

Padovan string, padovan string program 1 : package test.padovanstring; ...

padovan string program 1 : package test.padovanstring; public class PadovanString {     public int stringOccurrences(int n, String str){        if(n >= 40)     return -

MINIMUM SHELVES, Write a program to find minimum number of shelves

Write a program to find minimum number of shelves

What do you mean by a sequential access file, What do you mean by a sequent...

What do you mean by a sequential access file? - When writing programs which store and retrieve data in a file, it's possible to designate that file into various forms. - A s

Algorithms, create algorithm for doubly link list using c data structure

create algorithm for doubly link list using c data structure

#CompilerRelated, #C Why don''t online compilers support the header file?...

#C Why don''t online compilers support the header file? What can I do to resolve this? PS. I have tried , does''nt work either. Thannk in advance.

Program that computes square matrix multiplication, Goal: Design a progr...

Goal: Design a program that computes square matrix multiplication on GPU using CUDA. Write the code in C. In particular, your implementation should obey the following requiremen

Explain conversion functions, Conversion Functions Conversion functions...

Conversion Functions Conversion functions are member functions used for the following purposes: 1. Conversion of object to basic data type. 2. Conversion of basic data ty

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