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

I need online game dvelopment, Project Description: Online game developm...

Project Description: Online game development Online Live Baccarat Game is needed - client program. - server program(IOCP or ect..). - web program(ASP or PHP or etc..

Sequence for DMA controller, Write a sequence of instructions that transfer...

Write a sequence of instructions that transfers data from memory to an external I/O device by using channel 3 of the 8237 DMA controller. Transfer from 20000H-20FFFH.

Minimum shelf, how to find minimum number if shelves required

how to find minimum number if shelves required

Program to calculate average of marks, Program for calculate average of tot...

Program for calculate average of total marks: #include using namespace std; void print(int marks_arr[],int cnt) { int ind[cnt]; int i=0; int j=0; int k=0;

C program for function of average, C program for function  of average ...

C program for function  of average int average(int); void main() {           int max=0,c=0;           clrscr();           printf("ENTER THE LIMIT OF INPUT FOR AV

Explain about the constants in c language, Explain about the Constants in c...

Explain about the Constants in c language? The Constants in C refer to fixed values that don't change during the execution of a program. C has four fundamental types of constan

Find out the largest torque, Find out the largest torque: A flat belt...

Find out the largest torque: A flat belt is taken in use to transmit torque from pulley A to pulley B as shown in figure given below. The radius of each pulley is 50mm and co

Design a game in c, Design a game in c: const DODGERS = 0; const GI...

Design a game in c: const DODGERS = 0; const GIANTS = 1;   void main(void) {    int scoreboard [2][9];    // An array two rows by nine columns    int team, i

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