Write a program that creates 1,000,000 random integers 0-9. It should then create two threads, which iterate over % of the integers, summing them using a single global variable. When both threads complete, the main thread should print the sum, then sum the array itself and print the correct value. In the threads, wrap the access to the single global variable with a semaphore. Rerun. Change the threads to use a local variable for summing, and then update the global with the semaphore lock. Rerun.
Write a program that creates 1,000,000 random integers 0-9. It should then create two threads, which iterate over % of the integers, summing them using a single global variable. When both threads complete, the main thread should print the sum, then sum the array itself and print the correct value. In the threads, wrap the access to the single global variable with a semaphore. Rerun. Change the threads to use a local variable for summing, and then update the global with the semaphore lock. Rerun.
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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in c
Transcribed Image Text:Write a program that creates 1,000,000 random integers 0-9. It should then create
two threads, which iterate over % of the integers, summing them using a single
global variable. When both threads complete, the main thread should print the sum,
then sum the array itself and print the correct value.
In the threads, wrap the access to the single global variable with a semaphore.
Rerun.
Change the threads to use a local variable for summing, and then update the global
with the semaphore lock. Rerun.
Hints:
Don't forget to compile with -Ipthread
Make your semaphore global, your pthread structures local.
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