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Hi all,
please tell me what is the maximum number of threads that i use in my SDI type application.
its is safe to generate and handle this large number of threads in application,or there is any othre option to handle this.
i have an ListCtrl and this have hundred of items,i want to check all item at same time so i generate thread for each item, but some time there is execption occur when start or stop the thread.
please help me for this.
thanks in advance.
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It is not a good idea to have a large number of threads.
You must instead have a fixed number of threads and make use of them for your processing.
As for your question on the maximum number of threads, read this blog entry -
Pushing the Limits of Windows: Processes and Threads[^]
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«_Superman_» wrote: It is not a good idea to have a large number of threads.
You must instead have a fixed number of threads and make use of them for your processing.
please explain me better idea and approach for this.
if possible please provide me any sample application or example.
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Rule of thumb: "If in doubt then use just one thread. If you're really in doubt then use just one thread. If you actually need to waste system resources then use two threads".
On the serious side,
Le@rner wrote: i have an ListCtrl and this have hundred of items,i want to check all item at same time so i generate thread for each item, but some time there is execption occur when start or stop the thread.
You would experience no performance gain doing this, unless you have a CPU core per thread.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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CPallini wrote: You would experience no performance gain doing this, unless you have a CPU core per thread.
Blocking IO can be a good reason for (over-)threading for performance.
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True, but that's not the OP case (or, at least, that doesn't look like the OP case).
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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CPallini wrote:
You would experience no performance gain doing this...
Actually he would. I recently put together a little utility that does exactly what the OP wants (I offered it to him but he was not interested). When it had only one thread, it took over 20 minutes to check all of the links (i.e., URLs) in the list (slightly less than 500). When I changed it to check each link in its own thread, the time was dropped to around 2 minutes.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Man who follows car will be exhausted." - Confucius
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DavidCrow wrote: check all of the links (i.e., URLs)
This piece of info is missing in the original post.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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CPallini wrote: This piece of info is missing in the original post.
Yeah, see here for a recap.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Man who follows car will be exhausted." - Confucius
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OK. Now that makes sense. Thank you.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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DavidCrow wrote: I offered it to him but he was not interested
no sir its not right i really intrested and also reply for this and ask for code of given exe but u not replay me.
can u please explain it with example or provide me any sample example.
please help me for this.
i really need it.
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Le@rner wrote: i have an ListCtrl and this have hundred of items
Le@rner wrote: ,i want to check all item at same time
crap.
just think about that for one 1 second.
Anyway, depending on what "check" really means it can a _very_ performance degradation.
For a better solution to your problem, would be to use the CListCtrl in Virtual Mode, see MSDN[^] for more information.
Watched code never compiles.
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A virtual list control will not help him here. Besides, he has just "hundreds of items", which is not a lot.
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I did not know what "Check" was ...
Watched code never compiles.
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Maximilien wrote: I did not know what "Check" was ...
i have an list control and there is so much items.
list control have list of site links here i want to chk all links.
but all links have diffrent interval time to chk the link status so thats why not able to chk with single thread or function.
please tell me how can i do this for each and every link individually.
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i want sample programing in c language about computer
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C is not widely used anymore.
C++ is a superset of C.
You can code programs similar to C in C++.
Go to http://msdn.microsoft.com/, select Desktop and learn!
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Fareed Rizkalla wrote: You can code programs similar to C in C++.
You can but should not 
cheers,
AR
When the wise (person) points at the moon the fool looks at the finger (Chinese proverb)
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Here ya go:
#include <stdio.h>
void main( void )
{
printf(L"PEBKAC error. Please back away from the keyboard.\n");
}
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Man who follows car will be exhausted." - Confucius
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If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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A basic C programming language code example is in every, every, every (did I say every?) book (even in romance books, I guess).
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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CPallini wrote: (even in romance books, I guess).
Ya .. if we are romancing with Computer
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1. First of all Iwould like to set a value of a varuable during debugging in visual studio 2005
2. And then I had a question if the path is five as below does the compiler will take care of converting \\ to \ in the string
CString path = c:\Temp\\bin_Images\abc.txt"
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1. You can do this from one of the debug windows (Autos, Locals, Watch etc). Just click on the variable's value and change it to whatever you want it to be.
2. All backslashes in a string need to be escaped thus:
CString path = "c:\\Temp\\bin_Images\\abc.txt";
Just say 'NO' to evaluated arguments for diadic functions! Ash
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