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

Valid segments 1, Consider text comprised of sentences and sentences compri...

Consider text comprised of sentences and sentences comprised of words. Words in a sentence will be space delimited. Given a text and K strings, task is to find out the number valid

Define a function in c program, Define a function in c program: int f1...

Define a function in c program: int f1() { static int x=10; return x; } int f2() { int y=5; return y; } extern int z; void f()     {

Write down the code for binary search tree in c++?, A: BinarySearchTree.h ...

A: BinarySearchTree.h ---------------------- #ifndef BINARY_SEARCH_TREE_H_ #define BINARY_SEARCH_TREE_H_ #include "dsexceptions.h" #include // For NULL // Binary

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

a palindrome is a string that reads the same from bhote the ends

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

Star, how can i print any english work using star .?

how can i print any english work using star .?

Program to convert fraction to decimal, Program to convert fraction to deci...

Program to convert fraction to decimal: int main() {                 float num, denom;     // numerator and denominator of fraction                 float value;

What does extern mean in a function declaration in c++, It tells the compil...

It tells the compiler that a variable or a function exists, even if the compiler hasn't yet seen it in the file presently being compiled. This variable or function may be distinct

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