The first known correct software solution to the critical-section problemfor n processes
Chapter 5, Problem 5.9(choose chapter or problem)
The first known correct software solution to the critical-section problemfor n processes with a lower bound on waiting of n 1 turns waspresented by Eisenberg and McGuire. The processes share the followingvariables:enum pstate {idle, want in, in cs};pstate flag[n];int turn;All the elements of flag are initially idle. The initial value of turn isimmaterial (between 0 and n-1). The structure of process Pi is shown inFigure 5.22. Prove that the algorithm satisfies all three requirements forthe critical-section problem.
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