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Explain Critical section?


Necessary and sufficient conditions for a solution to the
c.s. problem:
1. Mutual Exclusion --- if is executing in one of its
critical sections, no , , is executing in its critical
2. Progress --- a process operating outside of its
critical section cannot prevent other processes from
entering theirs; processes attempting to enter their
critical sections simultaneously must decide which process
enters eventually.
3. Bounded Waiting --- a process attempting to enter
its critical region will be able to do so eventually.
1. No assumptions made about relative speed of
2. No process may remain in its critical section
indefinitely (may not terminate in its critical section)
3. A memory operation (read or write) is atomic ---
cannot be interrupted. For now, we do not assume
indivisible RMW cycles.

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