Q4) Race Conditions Given the following two programs that will run concurrently: Note that x is a shared variable. Assume that initially x=2 Program1 q=2 X=x+3 y=x+1 |q=y+1 Program2 w=2 | x=x+2 w=w+1 1) What are the expected values of x after both programs finish execution?; 2) Assume we wish to achieve mutual exclusion using Petersons solution, Rewrite

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Q4) Race Conditions
Given the following two programs that will run concurrently: Note that x is a shared variable.
Assume that initially x=2
Program1
q=2
X=x+3
Program2
w=2
x=x+2
y=x+1
q=y+1
w=w+1
1) What are the expected values of x after both programs finish execution?
2) Assume we wish to achieve mutual exclusion using Petersons solution. Rewrite
program1 using the enterCS() and exitCS()
Transcribed Image Text:Q4) Race Conditions Given the following two programs that will run concurrently: Note that x is a shared variable. Assume that initially x=2 Program1 q=2 X=x+3 Program2 w=2 x=x+2 y=x+1 q=y+1 w=w+1 1) What are the expected values of x after both programs finish execution? 2) Assume we wish to achieve mutual exclusion using Petersons solution. Rewrite program1 using the enterCS() and exitCS()
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