Answered: Write a multithreaded C++, Pthread…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write a multithreaded C++, Pthread program that outputs prime numbers <= N. This program should work as follows: the user will run the program and will enter a number N on the command line. The program will then create a separate thread that outputs all the prime numbers less than or equal to N specified in the command-line argument.

Please comment every line in the code with its funcionality

Expert Solution

Step 1: Algorithm

Start the program.
Check if the command-line input contains exactly two arguments (the program name and N). If not, print an error message with the correct usage and exit the program.
Parse the command-line argument N as an integer.
Define a function isPrime that takes an integer as input and returns a boolean indicating whether the number is prime or not.
Define a function printPrimes that takes a void pointer as an argument (used to pass the value of N to the thread function). Within this function: a. Extract the value of N from the void pointer argument. b. Loop from 2 to N and for each number, check if it is prime using the isPrime function. c. If the number is prime, print it to the console.
Create a thread object (primeThread) to execute the printPrimes function in a separate thread.
If the thread creation is successful, print an error message and exit the program.
Wait for the thread to finish execution using pthread_join.
End the program.

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