C / C++ / MFC

5-Jul-07 7:38

No.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Crash

tom groezer5-Jul-07 5:16

tom groezer

5-Jul-07 5:16

If the program crashed just entering main in a win32 console application what could be the reason of the crash?

David Crow5-Jul-07 7:04

5-Jul-07 7:04

Were any statements in main() executed?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

tom groezer5-Jul-07 7:24

tom groezer

5-Jul-07 7:24

NO.

#realJSOP5-Jul-07 7:11

#realJSOP

5-Jul-07 7:11

tom groezer wrote:
what could be the reason of the crash?

Bad code.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Matthew Faithfull5-Jul-07 7:50

Matthew Faithfull

5-Jul-07 7:50

I would guess that you did something during static intialisation that screwed up the stack.

Nothing is exactly what it seems but everything with seems can be unpicked.

CPallini5-Jul-07 9:27

CPallini

5-Jul-07 9:27

UFO

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.

Stephen Hewitt5-Jul-07 18:33

Stephen Hewitt

5-Jul-07 18:33

There are too many possible causes to go through. We need more information. What type of exception? Where is the call stack to the exception? Have you got the source around the crash? Have you got a disassembly around the crash?

Steve

Changing stream resolution

Hamid_RT6-Jul-07 1:02

Hamid_RT

6-Jul-07 1:02

Can you more explain about your program?

WhiteSky

boost question

Alex Cutovoi5-Jul-07 4:23

Alex Cutovoi

5-Jul-07 4:23

Hi for all

I need to instal boost in Visual C++ 6.0. I've the boost documentation in the boost.org, but I didn't success to their installation. Someone have installed boost in the Visual C++ 6.0? I need a help.

Thanks for the support

Re: boost question

Stephen Hewitt5-Jul-07 18:29

Stephen Hewitt

5-Jul-07 18:29

Can you give more details? What exactly is going wrong? Most of the libraries are header only libraries so you simply need to let your compiler know where they are. Some of the libraries require building however: if you want to use these you’ll need to use “bjam” to build them.

Steve

Re: boost question

Alex Cutovoi6-Jul-07 4:13

Alex Cutovoi

6-Jul-07 4:13

Shure.

I'm having problems with building of the Boost.thread
I don't understand what's going on.
In the docs, the following is written:

<br />
 Building should be possible with the default configuration. If you are running into problems, it might be wise to adjust your local settings of Boost.Build though. Typically you will need to get your user-config.jam file to reflect your environment, i.e. used toolsets. Please refer to the Boost.Build documentation to learn how to do this.<br />
<br />
To create the libraries you need to open a command shell and change to the boost_root directory. From there you give the command<br />
<br />
bjam --toolset=mytoolset stage --with-thread<br />
<br />
Replace mytoolset with the name of your toolset, e.g. msvc-7.1 . This will compile and put the libraries into the stage directory which is just below the boost_root directory. Boost.Build by default will generate static and dynamic variants for debug and release. <br />

When I execute these steps the bjam say that the stage directory is not found and it will be created.
But in the end of the process the folder is not created neither the libs.

Can you help?

Thanks again

Akin Ocal5-Jul-07 3:03

Akin Ocal

5-Jul-07 3:03

How can i change video resolution using sample grabber ?

Does VMR9 renderer supply a ready method for this operation ?

Thank you very much

Re: Changing stream resolution

Mark Salsbery5-Jul-07 7:33

Mark Salsbery

5-Jul-07 7:33

The Sample Grabber doesn't provide a way to change the video resolution AFAIK.

What are you wanting to do?

Here's some info: Dynamic Format Changes[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Go that way, really fast. If something gets in your way, turn."

Time of function

Max++5-Jul-07 2:36

Max++

5-Jul-07 2:36

My project is about getting data from USB port for processing something.
The data is very fast(around 1Mbyte/sec) and I'm not sure my function can process this job in time or not.
I need to check the time in each function.

How can I check it?

David Crow5-Jul-07 2:43

5-Jul-07 2:43

Max++ wrote:
I need to check the time in each function.

So just call time(), localtime(), asctime(), gmtime(), etc. I don't see how that is going to address the problem, however.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Max++5-Jul-07 3:17

Max++

5-Jul-07 3:17

All the function above can't use because the minimum time is 1 ms.
but each function take time less than that.
You can try this

<br />
CTime startTime = CTime::GetCurrentTime();//start of function<br />
---<br />
---//Process something in your function<br />
---<br />
CTime endTime = CTime::GetCurrentTime();//end of function<br />
CTimeSpan elapsedTime = endTime - startTime;<br />
CString str = elapsedTime.Format( "%S" );<br />
TRACE("%s\n",str);<br />

the result you will get is always zero.

David Crow5-Jul-07 3:23

5-Jul-07 3:23

Max++ wrote:
All the function above can't use because the minimum time is 1 ms.

I'm not sure what you are trying to say here, but since Windows is not a RTOS, the best resolution you can hope for is 15ms.

If you are simply wanting to "time" how long a function takes to execute, can't you just use the profiler?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Russell^'5-Jul-07 5:23

Russell^'

5-Jul-07 5:23

I don't know if it is possible for you...but you can create a loop that calls many time the functions ....then it will became easyer to check the time length needed from the functions.
If you loop 1000 times the function operation then you will transorm ms in seconds.
Hope this helps.

Russell

Mark Salsbery5-Jul-07 8:04

Mark Salsbery

5-Jul-07 8:04

QueryPerformanceCounter()/QueryPerformanceFrequency() may give you some numbers you can work with.

Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Go that way, really fast. If something gets in your way, turn."

Optimization techniques

himuskanhere5-Jul-07 1:39

himuskanhere

5-Jul-07 1:39

hey frnd...

What optimization techniques should I use to improve the performance in SDi application.

thnks...

CPallini5-Jul-07 1:57

CPallini

5-Jul-07 1:57

It really depends on the kind of application your need to develop (i.e. the question is too generic). BTW first think about reliability and then about optimization.

Smile | :)

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.

KarstenK5-Jul-07 2:54

KarstenK

5-Jul-07 2:54

As another poster wrote stability is the best optimization. It makes live of a programmer easy. Sleepy | :zzz:

To improve performance you gotta check, whether your program does somethings often. Try to reduce multiple thinks like creating brush or Api-Calls. Better make these values class members or globals.
Check loops carefully!!!

Greetings from Germany

led mike5-Jul-07 4:44

led mike

5-Jul-07 4:44

Use a profiler to show you "where" to optimize.