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Answer Posted / mahi 27
"semaphore " is an integer value that provide signalling
among the process
and it is an synchronization tool
semaphores are proposed by "DIJKSTRA"
generally semaphores are divided into 2 types
they are 1.General semaphore(or)counting semaphore
2.Binary semaphore(or)Mutex
in general semaphores 2 primitives are used they are
1.semwait(s)
2.semsignal(s)
semwait() checks decrements the semaphore value if the value
becomes negative then the process executing the semwait()is
blocked other wise the process continues execution
semsignal() increments the semaphore value if the value is
less than or equal to zero then a process blocked by a
semwait()operation is unblocked
| Is This Answer Correct ? | 18 Yes | 9 No |
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