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Greetings
I am trying to make threads that run loops to be at the exact same step as the other threads. For example an output to the application could be the following:
Thread 1 = iteration 1
Thread 2 = iteration 1
Thread 3 = iteration 1
Thread 4 = iteration 1
Thread 1 = iteration 2
Thread 2 = iteration 2
Thread 3 = iteration 2
Thread 4 = iteration 2
and not
Thread 1 = iteration 3
Thread 2 = iteration 2
Thread 3 = iteration 1
Thread 4 = iteration 1
Thread 1 = iteration 4
Thread 2 = iteration 3
Thread 3 = iteration 2
Thread 4 = iteration 1
I am thinking of an implementation such as:
the first thread runs the iteration and waits
the second thread runs the iteration and waits...
the last thread runs the iteration and notifies all the other threads to wake (and go to the next step)
I have tried the following but it doesnt work:
<br />
CommonClass commonObject = (CommonClass)o;
for (int i = 0; i < 4; i++)<br />
{<br />
Console.WriteLine("Thread " + Thread.CurrentThread.Name + " is in iteration " + i);<br />
lock (commonObject)<br />
{<br />
if (Interlocked.Decrement(ref threadCounter) == 1)
{<br />
threadCounter = 4;
Monitor.PulseAll(commonObject);
}<br />
else { Monitor.Wait(commonObject); }
} <br />
}<br />
Do you find this approach correct?
Can you please suggest feasible solution?
Thanks in advance
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Disclaimer: although I have studied threading, I am no guru, so take my suggestion with a grain of salt.
Also I'm not sure of .NET threading syntax, so everything will be in pseudocode.
---
Have one thread act as a scheduler for the rest of the threads, telling them when they are allowed to run.
1. Start running each thread.
2. When a thread completes an iteration, tell it to Wait on some condition variable that is regulated by the scheduler thread.
3. The scheduler thread will do nothing until the wait queue is "full" IE all available thread are waiting, or the "running" queue is empty.
4. The scheduler broadcasts to all waiting threads, telling them to wake up and start running.
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To do what you want you can use a locking mechanism on a data object and start the threads in order. Essentially the locking mechanism causes a side effect of putting the threads in the order that they are received at the lock.
HOWEVER, the order that the threads arrive at the lock is not guaranteed and thus your program may not run the order that you want.
I don't understand why you would use separate threads if the order that these operations be done is critical. If the order is critical, then you should use a single thread to process the operations in order to guarantee the order.
Phil
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hello C# community,
I have a windows form with a tab control in it, that acts as the container for 6 or 7 tabs. I would like to add shortcut functionality, so that when a user presses the F3 key on the key board it will go to tab1 of the tab control, F4 to tab2 of the tab control.....and so on.
I know I read how to do this somewhere, I have been having trouble locating where that was. Is it a property on the individual tab page or is it in the tabcontrol?
perhaps someone knows off the top of their head.
thanks in advance,
FG
-- modified at 10:38 Wednesday 25th July, 2007
I am who I am because of who everyone around me is.
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Impatient, aren't you?
This board is supported by volunteers who do this on their own time, not yours. You're not paying for support, so why are you bitching that you're not getting it fast enough??
Enable the KeyPreview property of your form, then handle the form's KeyDown event. Check for the hot keys you want and show the appropriate tab depending on which key was hit.
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Dave Kreskowiak wrote: You're not paying for support, so why are you bitching that you're not getting it fast enough??
I could give him a rather drawn out solution, but he'd have to pay up to me through PayPal first. Oh and by the way, my solutions are As-is, no refunds 
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
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relax...I just thought it was not such a hard question for this tremendous community.... In any case, I did not think that my post was particularly "rude", if I offended you or anyone else here at Code Project, my sincerest apologies.
Why does everything have to boil down to money. No I am not paying for support, but I am not paying for you to scowl me because I added a short comment to my own post. A great part of being part of a community is knowing how to interact in a community.
just like you, I am a volunteer as well, and where I can, I help people that need the help.
-- modified at 15:16 Wednesday 25th July, 2007
-- modified at 15:26 Wednesday 25th July, 2007
I am who I am because of who everyone around me is.
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P.S. a simple "I don't know" would have sufficed.....but thanks for your help anyhow.
-- modified at 15:15 Wednesday 25th July, 2007
I am who I am because of who everyone around me is.
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flyingnome wrote: P.S. a simple "I don't know" would have sufficed
How does "Turn the form's KeyPreview on and handle its KeyDown event..." translate to "I don't know how to solve your problem"?? Sounds like a solution that works to me...
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thanks Dave.
I am who I am because of who everyone around me is.
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flyingnome wrote: Is there really no one that knows how to do this?
Give people time to respond if they know. Impatience like that only is going to piss people off and allow them to be less likely to answer your question.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
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Paul Conrad wrote: Impatience like that only is going to piss people off
I didn't mean to piss anyone off.....just needed some help....sorry if you read the post and wanted to kick your dog.
I am who I am because of who everyone around me is.
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I have a login page that contains user id and password and then a button called ok...
My problem is after typing tha password i have to click the oke button... now i want this to happen on click of any button...like enter
please help me i am new to c#
Thanks Vikas
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There is property on the form, not the button.
After adding the button to the form, on the form set the AcceptButton property on the form. You also have a CancelButton property.
all can be done in form load
IButtonControl ib = (IButtonControl )button1;
this.AcceptButton = ib;
similarly others
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i am doing all this
this.DialogResult = DialogResult.ok
this.Hide();
this.Dispose(true);
Now here this is happening on click the ok button
this i want to happen on click of enter button
Thanks in advance..
vikas
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when you need it Enter Event
handle Key Event.
the form property is perfect.
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right now i have to click on ok button i want after type the password if user click enter button that time event shoud fire to accept this...
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what i suggested will do it for you
just set the property for form it will automatically call Ok button click event if you Enter.
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Thanks ashu.... it is working fine
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Hi am writing a application that have to save rectangle as an xml file.can anyone please help me to save rectangle as xml file using savedialog and xmltextwritter. my code is like this.
Stream myStream;
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.Filter = "xml files (*.xml)|*.xml|All files (*.*)|*.*";
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.RestoreDirectory = true;
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
if ((myStream = saveFileDialog1.OpenFile()) != null)
{
XmlSerializer mySerializer = new XmlSerializer(typeof(DocManager));
//StreamWriter wText = new StreamWriter(myStream,Encoding.UTF8);
XmlTextWriter myWriter = new XmlTextWriter(myStream, Encoding.UTF8);
mySerializer.Serialize(myWriter,type);
// myStream.Close();
// myWriter.Close();
//wText.Write(" your xml");
//myStream.Write("your xml");
myStream.Close();
myWriter.Close();
//wText.Close()
Mamphekgo
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Try this...
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.Filter = "xml files (*.xml)|*.xml|All files (*.*)|*.*";
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.RestoreDirectory = true;
if (saveFileDialog1.ShowDialog() == DialogResult.OK) {
XmlTextWriter w = new XmlTextWriter(saveFileDialog1.FileName, Encoding.UTF8);
w.WriteStartDocument(true);
w.WriteEndDocument();
w.Flush();
w.Close();
}
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Hi
I have one comment, unrelated to the original topic:
like so many people on this web site, you do Flush followed by Close
IMO there is no need for that, every Close has an implicit Flush in it.
The only time you must call Flush (and the reason for its existence) is when you dont Close
right now, but want to make sure the data gets pushed forwards (at least one level).
This may be useful if e.g. you are logging to a file, while another app is trying to show
the latest content of same file.
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Luc Pattyn wrote: IMO there is no need for that, every Close has an implicit Flush in it.
Yes. I think the only time that Flush should be used is if you need to flush out the buffer and keep the file open. Like how you mentioned with the log file...
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
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Hi,
This is related to the formatting, not the topic, of your message.
I am preparing an article on copying code snippets from a CodeProject message board to
Visual Studio; seems there are no problems when the browser used is FireFox, Safari, ...
but often problems arise when using Internet Explorer.
One of the factors is the tags that are present inside the < PRE> </PRE> block.
In your message the lines are separated by <br> tags; most other messages have
just regular newlines.
Could you please tell me how you get that, i.e. what tools you use, and how you go
about it. Thanks in advance.
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