Binary Semaphore

A binary semaphore is a simple synchronization tool used in computer systems to control access to shared resources. Imagine a light switch that can be either on or off: when it’s on, the resource is available; when off, it’s busy. Processes or tasks check this "switch" before accessing the resource. If it’s on, they turn it off and proceed; if off, they wait until it turns on again. This mechanism prevents conflicts or errors when multiple tasks try to use the same resource simultaneously, ensuring orderly and safe operation.