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

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?

Which port does FTP uses, Why is it called out of band protocol? A1) FTP us...

Why is it called out of band protocol? A1) FTP uses port 20 and port 21; port 20 is used for data connection, whereas port 21 is used for control connection. FTP is known as out-of

Electronic mail , Electronic mail is another PC to PC and PC to mainframe ...

Electronic mail is another PC to PC and PC to mainframe data exchange. If you subscribe to an electronic mail service, it will enable your PC to gain access to a 'mailbox' on a ma

Output options to various multimedia, The various systems (computer, softwa...

The various systems (computer, software and output devices) that are available have different limitations for output that is cartographic in nature. Some systems are CAD, GIS limit

Exchanging the values of two variables, Ask question #Minimum 10 pages ac...

Ask question #Minimum 10 pages accepted#

Example of flowcharting, Example of flowcharting: Example Problem s...

Example of flowcharting: Example Problem statement: To find out whether a given number is even or odd. Algorithm: Step 1 Start Step 2 INPUT the number n Step 3

DATA STRUCTURE, WHAT IS DATA STRUCTURE AND EXPLAIN ME.

WHAT IS DATA STRUCTURE AND EXPLAIN ME.

Python Strings and Python Lists, Python Strings: Strings in Python are rec...

Python Strings: Strings in Python are recognized as an adjacent set of characters in among quotation marks. Python permits for either pairs of single or double quotes. Subsets of s

Library function, Library function : These are the functions supplied...

Library function : These are the functions supplied with the programming language. The code or definition of library functions does not have to be written in a user program w

Bakery management system, ER digram

ER digram

Syntax of a Macro, The divisions which make a macro are: • Declaration of t...

The divisions which make a macro are: • Declaration of the macro Code of the macro Macro termination directive The assertion of the macro is done the following way: Name Macro [par

Write Your Message!

Name

Email id

Message

Verfication Code

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!

Submit Assignment

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