With help of neat diagram describe binary semaphore.

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written 5.3 years ago by

teamques10 ★ 64k

A binary semaphore can only take two values 0 or 1.
Semaphore value 0 or 1 is used to indicate availability and unavailability respectively.
Consider task 1 and task 2 wanting to access a resource (say printer).
Semaphore is like a key when acquired count is 0. Task A acquires the shared resource and changes semaphore count to 0 to indicate shared resource is not available for anothertask.
At the same time, task B wants to acquire the shared resource but has to wait till the count becomes 1.
Now task B can acquire the shared resource

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