Semaphores

Mutexes
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Mutexes

When the semaphore's ability to count is not required, a simplified version of the semaphore, called a mutex, is often used. Mutexes are good only for managing mutual exclusion to some shared resource or piece of code. They are easy and efficient to implement, which makes

Message Passing
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Message Passing

That something else is message passing. This method of interprocess communication uses two primitives, send and receive, which, like semaphores and unlike monitors, are system calls rather than language constructs. As such, they can easily be put into library procedures,

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