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?

Description of Instruction execution, When software is installed onto a mod...

When software is installed onto a modern day personal computer (most commonly from a CD-ROM, though other media or downloading from the internet is also common), code comprising th

Digital wireless telephone networks, Mobile telephone networks started with...

Mobile telephone networks started with analog technology. Analog cellular networks were known as first generation (1G) networks. Such networks had limited capacity, and were subjec

Definition of ALU , The ALU, or the arithmetic and logic unit is the part...

The ALU, or the arithmetic and logic unit is the part of the processor that is occupied with executing operations of an arithmetic or logical nature. It works in conjunction by mea

Social networking, SOCIAL NETWORKING:  A social network is a network o...

SOCIAL NETWORKING:  A social network is a network of individuals which have some sort of interdependence on each other. This interdependence may be in the form of friendship,

Arithmetic and logic unit, Arithmetic and Logic Unit: The Arithmetic a...

Arithmetic and Logic Unit: The Arithmetic and Logic Unit is that part of the CPU that actually performs arithmetic and logical operations on data. The CU, CPU registers and me

What is the structure of a global.asax file in asp.net, Question (a) De...

Question (a) Describe the following built-in functions and illustrate each using simple examples. Specify every possible parameters where required Replace() StrComp()

What is heuristic evaluation, Question 1: (a) How would you describe h...

Question 1: (a) How would you describe human reasoning? (b) Describe the different types of human reasoning? Question 2: (a) What are the computational factors affec

Briefly explain main parts of the camera, Question 1 Briefly explain main ...

Question 1 Briefly explain main parts of the Camera Question 2 Write a note on: Ripple Edit Tool, Rate Stretch Tool & Track Selection Tool Question 3 What is Pixel

Static ram, STATIC RAM: Flip-Flops are the basic memory cells in a stat...

STATIC RAM: Flip-Flops are the basic memory cells in a static RAM. Each flip-flop is based on either two bipolar transistors or two Metal Oxide Semiconductors Field-Effect Tra

Enterprise resource planning, ENTERPRISE RESOURCE PLANNING What ...

ENTERPRISE RESOURCE PLANNING What has football got to do with it? asks management guru Michael Hammer in his latest best seller Beyond Reengineering. The answer is almos

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