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

String routines in c, Available in the string.h header file are the followi...

Available in the string.h header file are the following routines         strcat(string1,string2);   This joins string2 to string1; care must be taken to allocate enough space for

Memory management system, 1. Basic Heap: Each memory location in our model ...

1. Basic Heap: Each memory location in our model of the RAM will be an instance of type Memory: 2. typedef union Memory_u Memory; 3. union Memory_u{ 4. char character;

I want application to generate premium, Project Description: We want to ...

Project Description: We want to generate premium numbers for one of our application. What we need is: A program that generate 2, 3, 4, 5, 6, 7, 8 digits premium numbers

Explain operators in c language, Explain Operators in C Language? The C...

Explain Operators in C Language? The C language is very rich in built - in - operators and it places more significance on operators than do most other computer languages. The C

The Shell or Command Line Interpreter is the fundamental Use, 1. The shell ...

1. The shell must support the following internal commands: i. cd - Change the current default directory to . If the argument is not present, report the current directory. If t

Rfid call to filmmaker pro database, Project Description: I want an expe...

Project Description: I want an experienced programmer to program an RFID tag that will be read (maybe also written), and perform a call to a Filmmaker Pro 13 database. Skills

Area under Curve, #queWrite a program to find the area under the curve y = ...

#queWrite a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points c

Implement binary heap in c++?, A:BinaryHeap.h ------------ #ifndef BI...

A:BinaryHeap.h ------------ #ifndef BINARY_HEAP_H_ #define BINARY_HEAP_H_ #include "dsexceptions.h" #include "vector.h" // BinaryHeap class // CONSTRUCTION: wi

Explain the polymorphism in object-oriented programming, Problem: (a) ...

Problem: (a) A GUI can contain text-fields, buttons, and other labels. A button usually triggers an event on the GUI. Explain the different processes in registering an event

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