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Monitor: Mutual Exclusion in Single System

01 Apr 2011 by



Monitor and Semaphore is somehow the same. However, monitor adds more abstract layer to semaphore. Semaphore refers to operation level while monitor refers to class level which is the combination of many operations and variables.


By definition, a monitor is a collection of procedures and data that are all grouped together in a class. Just as semaphore, monitor ensures that a particular thread can exclusively access to a shared resource at a specific time. Monitor may implement semaphore and condition variable over the critical section to provide the best total single flow of modifying the resources.

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