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The module is a lab assignment to help you better understand the very basics of Microsoft Visual Basic queues.

Introduction

This lab module will help you become familiar with the basics of queues in Microsoft Visual Basic. The exercises are written assuming you are using Visual Basic 2005 and the .NET Framework version 2.0 (or later). Some older versions will work the same, but you may need to figure out some differences. It should work with newer version also.

Module prerequisites

You should complete the Visual Basic Threads and Semaphores lab before this one.

Labratory

Part 1

  • In this part you will just put some items on a queue and then take them off and print them.
  • Start up Visual Studio and create a new Visual Basic project.
  • In the Form1 class make a queue variable and then a synchronized queue.
  • In the Form1_Load method put the following objects on the queue:
  1. The string "Hello"
  2. The string "World"
  3. The number 23
  4. The string "Twenty Three"
  • Now make a for loop that iterates using the Count property of the queue.
  • Inside the loop, dequeue items from the queue and print them to the console.
  • Run your program and record the results.

Part 2

  • In this part you will create two threads where one thread will write to a queue and the other will take the items off and print them. No synchronization will be done in this part. The reading thread will need to keep checking to see if there is anything on the queue.
  • Start up Visual Studio and create a new Visual Basic project.
  • In the Form1 class make a queue variable and then a synchronized queue. Use the synchronized queue.
  • Make two threads in the Form1 class and start them up in the Form1_Load method.
  • In the method for the first thread:
  1. make a counter variable
  2. make a loop that loops forever
  3. in the loop increment the counter
  4. in the loop put the counter value on the queue
  • In the method for the second thread:
  1. make a loop that loops forever
  2. in the loop make an if statement that checks the count property of the queue
  3. if the count value is not zero, take an element off the queue and print it
  4. if the count value is zero, print a statement that says there was nothing on the queue
  • Run your program and record the results.

Part 3

  • In this part you will create two threads where one thread will write to a queue and the other will take the items off and print them. Synchronization will be done in this part. The reading thread will wait until there is something on the queue then take all the elements off and print them. The writing thread will signal the reading thread when it puts something on the queue.
  • Start up Visual Studio and create a new Visual Basic project.
  • In the Form1 class make a queue variable and then a synchronized queue. Use the synchronized queue.
  • In the Form1 class make an AutoResetEvent event variable that will be used to synchronize the two threads.
  • Make two threads in the Form1 class and start them up in the Form1_Load method.
  • In the method for the first thread:
  1. make a counter variable
  2. make a loop that loops forever
  3. in the loop: increment the counter, put the counter value on the queue, print a statement telling what was written, signal the AutoResetEvent event with the Set method
  • In the method for the second thread:
  1. make a loop that loops forever
  2. in the loop print a statement saying that the task is about to wait
  3. have the thread wait for the AutoResetEvent event by calling the WaitOne method
  4. after the WaitOne call, make another while loop that keeps removing items from the queue as long as the count is greater than zero
  5. print the value of the element taken off the queue to the console
  • Run your program and record the results.

Part 4

  • This uses the code from the previous part.
  • After writing the value to the queue, have the first thread sleep for 100 ms using the command
Thread.Sleep(100)
  • Run your program and record the results.

Questions & Answers

How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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Source:  OpenStax, Ti dsp/bios lab. OpenStax CNX. Sep 03, 2013 Download for free at http://cnx.org/content/col11265/1.8
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