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YouTubeGate Smashers
L-3.8: Semaphores | Wait, Signal Operation | Counting Semaphore | Example| Operating system
Semaphore is a variable that is non-negative and shared between threads. A semaphore is a signaling mechanism, and a thread that is waiting on a semaphore can be signaled by another thread. It uses two atomic operations, 1) Wait, and 2) Signal for the process synchronization. In this video, Varun sir will introduce Semaphore in detail in a ...
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The semaphore machine, unveiled in 1791, was based on signalling with what?
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