bsmanyan

 Profile Answers by bsmanyan 

• Jan 29th, 2009

 

A hardware or software flag. In multitasking systems, a semaphore is a
variable with a value that indicates the status of a common resource. It's used
to lock the resource that is being used. A process needing the resource checks
the semaphore to determine the resource's status and then decides how to
proceed.