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?

Chat, Chat: The word chat in English language means - casual conversat...

Chat: The word chat in English language means - casual conversation. On Internet it means the same, except that you need to use text and your keyboard skills are tested. Earli

Environment for intelligent agents-artificial intelligence, Environments ...

Environments We have seen that intelligent agents might take into account certain information when   choosing   a   rational   action, by  including information from its sensor

ASP.net, educational website project

educational website project

Access database, 1.Add a Validation Rule for Date of Birth so no one under ...

1.Add a Validation Rule for Date of Birth so no one under the age of 18 can be added to the table. Hint: subtract the DOB from today''s date and divide by 365.25 (watch the parenth

Frequency and bandwidth, Frequency and Bandwidth: Let us try to unders...

Frequency and Bandwidth: Let us try to understand a little about how information is transmitted. The information may be in the form of sound (human voice, music) or it may be

Explain the universal nand and nor gates, Question 1 Describe the followin...

Question 1 Describe the following- Binary Number System b. Octal Number System Hexadecimal Number System   Question 2 Describe the Canonical Logical Forms-

Ms-powerpoint presentation for promoting national parks, Ms-PowerPoint Pres...

Ms-PowerPoint Presentation for Promoting National Parks You have been hired by Tourism Department to make a presentation to the travel agents from different countries. Design

Utility , what are the definition?

what are the definition?

Debugging, Debugging Once a program has been written, it has to ...

Debugging Once a program has been written, it has to be tested first to ensure that it is free of errors. It is very normal that any program written will contain mistake

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