C / C++ / MFC

Re: Call Stack in Visual C++ 2005

9-Jan-09 7:05

Menu Debug->Windows->Call Stack (or ALT + 7) on my VC++ 2008 Express Edition...
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DSPCottage9-Jan-09 7:19

DSPCottage

9-Jan-09 7:19

thnax a lot

Re: Call Stack in Visual C++ 2005

CPallini9-Jan-09 7:42

Moving window causes exception

9-Jan-09 7:42

You are welcome.
Smile | :)

Paffinity9-Jan-09 6:30

Paffinity

9-Jan-09 6:30

I have an MFC app that is having some weird issues.
When you start the program and don't move window around it works fine. But as soon as you start moving it around, an exception will occur.
Debugging this in VS, I will get a buffer overrun message or some MFC debug assertion. I'm pretty new to MFC, anyone have any ideas where I should look to fix this?

Re: Moving window causes exception

CPallini9-Jan-09 6:43

How to Close or Kill the thread

9-Jan-09 6:43

Paffinity wrote:
I'm pretty new to MFC, anyone have any ideas where I should look to fix this?

Very close to the error message (or as last resort, you may post it here).

You should be precise to get any help.
Smile | :)

Member 46517419-Jan-09 4:30

Member 4651741

9-Jan-09 4:30

Hi,

I am using AfxBeginthread in my application for reading the datas from my hardware via serial ports. after clsoing my GUI, when i try to open once again, am getting error that "exe is running". I have closed my handles related to port in destructor of the class. i suspect the Thread is not closed completely, it occupies the memory, i want to know whats the better way to close or kill the thread.

thanks in advance,

Balaji S

Cedric Moonen9-Jan-09 4:47

Cedric Moonen

9-Jan-09 4:47

Use a flag that you set from your main thread.

In your second thread, it looks like:

while (bContinue)
{
// Do processing
}

Once the flag is set to false by your main thread, the loop will finish and the thread function will return, terminating nicely the thread. Of course, how to implement this depends a lot of your current design, this is just the basic principle.

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Member 46517419-Jan-09 4:51

Member 4651741

9-Jan-09 4:51

Hi,

thanks for your reply.

now am doing by that way, after false condition am using "afxendthread" function. is it recommended to use or coming out from the while loop itself enough to close the thread.

thanks
balajsi

Cedric Moonen9-Jan-09 5:08

Cedric Moonen

9-Jan-09 5:08

Member 4651741 wrote:
now am doing by that way, after false condition am using "afxendthread" function

Never do that. Simply exit the function (but you have to be sure that you exited the function). Never close a thread by calling afxendthread.

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Code-o-mat9-Jan-09 4:55

Code-o-mat

9-Jan-09 4:55

Well, just return from the thread routine. Killing a thread is not recommended really...

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Member 46517419-Jan-09 5:00

Member 4651741

9-Jan-09 5:00

Hi,

thanks,

but my concern is, whether my thread occupy memory after closing the application. thats whay i used afxendthread function

Code-o-mat9-Jan-09 5:19

Code-o-mat

9-Jan-09 5:19

See here[^]. It doesn't seem to matter if you use AfxEndThread or simply return.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

C++ and Sqlite connection

Mark Salsbery9-Jan-09 11:33

Mark Salsbery

9-Jan-09 11:33

Member 4651741 wrote:
my concern is, whether my thread occupy memory after closing the application

In the link provided by Code-o-mat, see the part about the CWinThread::m_bAutoDelete
member...

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

vanishaa9-Jan-09 2:45

9-Jan-09 2:45

hi there, i need some help here. I need to develop a standalone application using sqlite and c++...I have used sqlite browser to develop my database. So how does that get connected to c++??

Thank you.

David Crow9-Jan-09 3:03

David Crow

9-Jan-09 3:03

Are you using MFC?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

vanishaa9-Jan-09 3:11

9-Jan-09 3:11

what is MFC? I'm not sure..I'm using the normal c++ code. Don't think so it a MFC.

David Crow9-Jan-09 3:20

David Crow

9-Jan-09 3:20

vanishaa wrote:
what is MFC?

Microsoft Foundation Classes. A very nice wrapper around portions of the Windows API. Two classes of interest are CDatabase and CRecordset.

vanishaa wrote:
I'm using the normal c++ code.

Then you'll need this.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

vanishaa9-Jan-09 3:30

9-Jan-09 3:30

Actually I'm doing a portable program which can be executed in any windows platform without any installation. Do you have any suggestions for portable database which can be connected to c++?? Currently I'm working on sqlite. But its kind of complicated.

Thank you.

CPallini9-Jan-09 7:10

9-Jan-09 7:10

vanishaa wrote:
what is MFC?

My First C program?
Big Grin | :-D

markkuk9-Jan-09 3:40

markkuk

9-Jan-09 3:40

You #include <sqlite3.h> in your code, link with the sqlite library and use the SQLite C++ API[^] to access the database.

Thilek9-Jan-09 3:54

Thilek

9-Jan-09 3:54

I think she is still blur how to to use the API.. show her a simple connection program plz... i don know about database so i not sure hw to help her.. :P

Thanks Smile | :)

vanishaa9-Jan-09 4:05

9-Jan-09 4:05

what does a linker error means?? When i include the #include<sqlite3.h> header file alots of linker error messages is appearing..

Cedric Moonen9-Jan-09 4:07

Cedric Moonen

9-Jan-09 4:07

That you forgot to link to the required library. It means that the code compiles fine (there are no syntax error in the code) but when the linker tries to assemble everything together, it can't find some specific functions, because you didn't specify the library from which they are coming from.

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Stuart Dootson9-Jan-09 4:16

Stuart Dootson

9-Jan-09 4:16

Look again at this article[^]. The "Working With SQLite" section gives you instructions for how to build an import library (.LIB file) for the SQLite 3 DLL. To use it, add a line like this to your main C++ file:

#pragma comment(lib, "sqlite.lib")

This will cause the linker to look in SQLite.lib for the SQLite functions.