Computer Sciences > Gate 2020 > semaphores
Each of a set of n processes executes the following code using two semaphores a and b initialized to 1 and 0, respectively. Assume that count is a shared variable initialized to 0 and not used in CODE SECTION P.
CODE SECTION P
wait(a); count=count+1;
if (count==n) signal (b);
signal (a): wait (b) ; signal (b);
CODE SECTION Q
What does the code achieve ?
CODE SECTION P
wait(a); count=count+1;
if (count==n) signal (b);
signal (a): wait (b) ; signal (b);
CODE SECTION Q
What does the code achieve ?
Correct : a
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