when do u need semaphores and what kind of semaphores RTX-51 provided?

Question

Accepted Answer

Semaphores are needed to synchronize access to shared resources. RTX-51 provides binary and counting semaphores.

Semaphores are used to prevent race conditions and ensure mutual exclusion.
Binary semaphores are used to signal the availability of a resource, while counting semaphores are used to limit the number of concurrent accesses.
RTX-51 provides both binary and counting semaphores.
Example: A printer can be accessed by multiple processes, but only one process can use it at a time. A binary semaphore can be used to signal the availability of the printer.
Example: A shared memory buffer can be accessed by multiple processes, but only a limited number of processes can access it at a time. A counting semaphore can be used to limit the number of concurrent accesses.

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