Consider the following critical-section protocol, and then answer the questions next: int flag [2] = {2,2}; |/ flag[i] =0 or 1 or 2. int turn=0; 1. flag[i] = 1; 2. While(flag[j]==1) { flag[i] = 0; 3. 4. while (turn! = i && flag[j]! = 2) 5. 6. } 7. turn = i; 8. |/ critical section// 9. |/ Exit Protocol 10. turn = j; 11. flag[i] = 2; Q1) Does this code satisfy progress? Show why? Q2) Does this code satisfy BW? Show why?

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
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Consider the following critical-section protocol, and then answer the questions next:
int flag [2] = {2,2}; |/ flag[i] =0 or 1 or 2.
int turn=0;
1. flag[i] = 1;
2. While(flag[j]==1) {
flag[i] = 0;
3.
4.
while (turn! = i && flag[j]! = 2)
%3D
5.
6. }
7. turn = i;
8. // critical section//
9. // Exit Protocol
10. turn = j;
11. flag[i] = 2;
Q1) Does this code satisfy progress? Show why?
Q2) Does this code satisfy BW? Show why?
Transcribed Image Text:Consider the following critical-section protocol, and then answer the questions next: int flag [2] = {2,2}; |/ flag[i] =0 or 1 or 2. int turn=0; 1. flag[i] = 1; 2. While(flag[j]==1) { flag[i] = 0; 3. 4. while (turn! = i && flag[j]! = 2) %3D 5. 6. } 7. turn = i; 8. // critical section// 9. // Exit Protocol 10. turn = j; 11. flag[i] = 2; Q1) Does this code satisfy progress? Show why? Q2) Does this code satisfy BW? Show why?
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