Consider the following program: const int n=10; int s; //shared variable between two processes (threads) void P1( ) { int i=0; for (i=0;i
Consider the following program: const int n=10; int s; //shared variable between two processes (threads) void P1( ) { int i=0; for (i=0;i
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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Transcribed Image Text:Consider the following program:
const int n=10;
int s; //shared variable between two processes (threads)
void P1( )
{
int i=0;
for (i=0;i<n, i++)
s+=i;
}
void P2( )
{
int i=0;
for (i=0; i<n; i++)
s-=i;
}
void main ()
s=0;
Parbegin (P1, P2);
Printout s;
{
//start two processes (threads)
}
(1)
What is the minimum possible final value of s? What is the maximum possible final
value of s?
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