Question: 6.7 The pseudocode of Figure 6.15 illustrates the basic push() and pop() operations of an array-based stack. Assuming that this algorithm could be used in

6.7 The pseudocode of Figure 6.15 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] = item;

top++;

} else ERROR

}

pop()

{

if (!is empty()) {

top--;

return stack[top];

} else ERROR

}

is empty() {

if (top == 0)

return true;

else

return false;

}

Figure 6.15 Array-based stack for Exercise 6.7.

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