Question: For mutual exclusion with a preemptive scheduler, it is necessary to introduce explicit locks, and machinery that makes requesting processes wait when a lock is

For mutual exclusion with a preemptive scheduler, it is necessary to introduce explicit locks,

and machinery that makes requesting processes wait when a lock is unavailable. We

considered casting our locks as semaphores, but decided that, compared with monitors, they exert too little structuring discipline on concurrent programs."

How do semaphores "exert too little structuring discipline" and how is this remedied by monitors? Construct an example to show how the structuring discipline exerted by monitors could be useful

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