Use of semaphores for the critical sections of a task
Illustrates the use of semaphores for the critical sections of a task?
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Utilization of a Single Semaphore:
Semaphore gives a mechanism to let a task wait until other finishes. This is a way of synchronizing concurrent process operations. While a semaphore is 'taken' by a task, then which task has to access to the essential resources; when specified, the resources unlock. Semaphore can be utilized as an event flag or like a resource key. Here resource key is one which permits use of resources as CPU, memory or critical section codes Semaphore or other functions that is a binary Boolean variable (or this is a signaling variable or may notifying variable). Used as event flag. Semaphore is termed as binary semaphore while its value is 0 and this is assumed that this has Boolean taken. While its value is l, this is assumed that no instants have taken this and that this has been released.
Figure: The semaphore among tasks, A and B, it demonstrates the five sequential actions at five different tasks.
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