What is a semaphore? #ShawnHymel #electronics #engineering #maker
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What is a semaphore? #ShawnHymel #electronics #engineering #maker
A semaphore is a synchronization primitive similar to a mutex, but it can count beyond just 0 and 1 (what mutexes are limited to). While a mutex acts like a single key to a restroom, a semaphore is like having multiple keys that can unlock multiple bathrooms in a shopping complex. Semaphores are used to control access to critical resources or ...
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Railway Semaphore Signal History
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