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 that implements inference given a bayesian network, In this problem...

In this problem, you will write a program that implements two algorithms for performing exact inference given a Bayesian network, namely, enumeration and variable elimination. Your

A palindrome is a string that reads the same from both the e, submitting so...

submitting solutions in C language should not use functions from / as these files do not exist in gcc

Wap to calculate total marks and percentage of 3 subjects, WAP TO ACCEPT MA...

WAP TO ACCEPT MARKS OF THREE SUBJECT FOR STUDENT & CALCULATE TOTAL MARKS AND PERCENTAGE #include stdio.h> #include conio.h>   void main() {            int M1,M

Define passing by reference?, A: Method of passing arguments to a function ...

A: Method of passing arguments to a function that takes parameter of type reference.  for instance: void swap( int & x, int & y ) { int temp = x; x =

Program is to define a class as library, Program is to define a class as li...

Program is to define a class as library: Program is to define a class as library and perform all the function of library management by using classes and object class librar

C program to demonstrate call by reference, C program to demonstrate call b...

C program to demonstrate call by reference: void disp(int *,int*,int*,int*); void main() {                 int a=2,b=3, sum,mul;                 printf("Enter 1st n

When should you use multiple inheritance, There are 3 acceptable answers: "...

There are 3 acceptable answers: "Never," "Rarely "and" When the problem domain cannot be accurately modelled any other way."

Pebblemerchant, write a c++ program for pebble merchant

write a c++ program for pebble merchant

Illustrate the example of constructor, A Constructive Example Consider ...

A Constructive Example Consider an example , to model a user-defined data type for  strings. The object simulates a character array ( string ) using a character pointer and an

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