The pseudocode of Figure 6.16 illustrates the basic push() and pop() operations of an array-based stack. Assuming that this algorithm could be used in a concurrent environment, answer the following questions: a. What data have a race condition? b. How could the race condition be fixed?

The pseudocode of Figure 6.16 illustrates the basic push() and pop() operations of an array-based stack. Assuming that this algorithm could be used in a concurrent environment, answer the following questions: a. What data have a race condition? b. How could the race condition be fixed?

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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Question

The pseudocode of Figure 6.16 illustrates the basic push() and pop() operations of an
array-based stack. Assuming that this algorithm could be used in a concurrent environment, answer the following
questions:
a. What data have a race condition?
b. How could the race condition be fixed?
push(item) {
if (top < SIZE) {
stack (top]
top++;
}
else
= item;
ERROR
}
pop () {
if (!is.empty()) {
top--;
return stack[top];
else
ERROR
}
is.empty() {
if (top 0)
return true;
else
return false;
}
Figure 6.16 Array-based stack for Exercise 6.12.

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