what is Semaphore and explain with example?, Basic Computer Science

Assignment Help:
Description
A semaphore is a confined variable whose value can be accessed and changed only by the operations P and V and initialization operation known as ''Semaphoiinitislize''.
• Binary Semaphores can take for granted only the value 0 or the value 1 counting semaphores also described general semaphores can suppose only nonnegative values.

• The P (or wait or sleep or down) operation on semaphores S, assumed as P(S) or wait (S), controls as follows:
• P(S):

IF S > 0
THEN S := S - 1
ELSE (wait on S)

The V (or signal or wakeup or up) process on semaphore S, written as V(S) or signal (S), controls as follows:
V(S): IF (one or additional process are waiting on S)
THEN (let one of these processes proceed)
ELSE S := S +1


Related Discussions:- what is Semaphore and explain with example?

Operation system, how to create 1000 random processes with time scales betw...

how to create 1000 random processes with time scales between 10 to 400 milliseconds

Visual basics, Assume that s is a string variable  that is supposed to con...

Assume that s is a string variable  that is supposed to contain a value to be converted to integer. Write a fragment of code that converts the value to integer variable  and displ

Diskless workstations, Diskless workstations:    Most people assume th...

Diskless workstations:    Most people assume that the operating system is stored on a disk that is connected directly to the computer, but this is not necessarily true. If the

Explain data movement ?, In any program it is essential to move the data in...

In any program it is essential to move the data in the memory and in the CPU registers; there are a number of ways to do this: it can copy data in the memory to a number of registe

C programming, a cloth merchant A cloth showroom has announced the followin...

a cloth merchant A cloth showroom has announced the following seasonal discounts on purchase of items: Purchase amount Discount Mill items Handloom items 0-100 - 5% 101-200 5% 7.5%

Data base, advantages of file base system

advantages of file base system

How is the ack request formed, QUESTION a) The handling of the INVITE t...

QUESTION a) The handling of the INVITE transaction in SIP is completely different from the handling of other transactions. The handling of the INVITE is one of the most complex

Packet switching, Packet Switching: This is one of recent techniques o...

Packet Switching: This is one of recent techniques of switching. Packet switching was originally developed for use by ARPA network by the Defence Department of US. According t

Hypermedia, Hypermedia: When the desired webpage loads into your brows...

Hypermedia: When the desired webpage loads into your browser you will see the text comes in, the pictures arrives, the animation gets loaded and so on. You will notice that so

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd