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

Pointers, one of the applications of computers in numerical analysis is com...

one of the applications of computers in numerical analysis is computing the area under a curve. one method of calculating the area under acurve is to divide the area int a number o

Write program to get largest element in array using function, Write a progr...

Write a program to get the largest element in an array using Function? # include int largest(int b[],int); main() { int lar,a[5]={12,2,36,40,5}; lar=largest(a,n); printf("

.program, Write a c++ program to find the sum of 0.123 ??103 and 0.456 ??10...

Write a c++ program to find the sum of 0.123 ??103 and 0.456 ??102 and write the result in three significant digits

''c'' programme, Write a ''C'' program to accept any 3 digit integer number...

Write a ''C'' program to accept any 3 digit integer number from the keyboard and display the word equivalent representation of the given number.

Program to multiply 2 complex no.s - c++ program, THIS PROGRAM IS TO MULTIP...

THIS PROGRAM IS TO MULTIPLY THE TWO COMPLEX NO.S GIVEN BY THE USER #include #include #include struct complex     {     int real;     int imag;     }; void main()  {  clrs

Develop capturing printer output apps using raspberry, In POS system, cashi...

In POS system, cashier computer connect to printer using serial rs232 usb or cable. We need to capture data from that connection, and parsing the data to get total amount for every

Explain about the variables in c language, Explain about the Variables in c...

Explain about the Variables in c language? The Variable is an identifier that is used to represent some specified kind of information within a designated portion of the program

Maze, How would I make a maze in C++? I would prefer to use the recursion m...

How would I make a maze in C++? I would prefer to use the recursion maze generation algorithm if possible, thanks!

How can dereferencing the pointer this, Dereferencing the Pointer this ...

Dereferencing the Pointer this Sometimes a member function requires to make a copy of the invoking instance so that it can change the copy without affecting the original instan

Wap for the game hangman-using functions with txt graphics, The game of han...

The game of hangman may have originated in the Victorian era, and involves trying to guess a word by suggesting letters. The game is played as follows: A word is chosen and the pl

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