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What is Semaphore in Operating System? PDF Download

Learn Semaphore definition in operating system with explanation to study “What is Semaphore”. Study semaphore explanation with operating system terms to review operating system course for online degree programs.

Semaphore Definition

  • An integer value used for signaling among processes.

    Operating Systems by William Stallings

Semaphore Explanation

A semaphore is a variable or abstract data type used to control access to a common resource by multiple processes in a concurrent system such as multitasking operating system. Semaphores are integer variables that are used to solve the critical section problem using two atomic operations, wait and signal.

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