C / C++ / MFC

Re: CPU uasage is very high for Application

30-Jun-06 2:33

Can you be more specific

whitesky

neilsolent30-Jun-06 11:56

neilsolent

30-Jun-06 11:56

Most likely cause is a for or while loop that does not end because there is a bad value of a variable or wrong assumption in the code somewhere

cheers,
Neil

A (simple) MFC DLL Question

Dave Kerr30-Jun-06 0:53

Dave Kerr

30-Jun-06 0:53

Hi,

I am writing a DLL that links dynamically to MFC. I am having a serious problem with threads; when I create a thread using AfxBeginThread, the thread process fails.
After examining with the debugger, it seems that the data I pass to the thread (a void*, which in my case is a pointer to a CObject* derived class) is being corrupted; calling ASSERT_KINDOF on the object fails (the actual failure is that internally the object cannot call GetRuntimeClass) and skipping ASSERT_KINDOF and simply calling a function of the class fails.

It seems the object's virtual function table is being problematic. At the beginning of every possible relevant function I have used AFX_MANAGE_STATE(AfxGetStaticModuleState()); to see if this helps. It doesn't.

Is there an in-built limitation to threading like this in DLLs? BTW this is not an MFC extension DLL, just a dll that dynamically links to MFC.

I have a big deadline approaching and any help would be enormously appreciated!

Thanks in advance!

Dave Kerr

Re: A (simple) MFC DLL Question

Sarath C30-Jun-06 0:58

Sarath C

30-Jun-06 0:58

can't you use CreateThread instead?

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."
My Blog | Understanding State Pattern in C++

Re: A (simple) MFC DLL Question

Dave Kerr30-Jun-06 1:17

Dave Kerr

30-Jun-06 1:17

CreateThread gives exactly the same problem. I am convinced it is a memory issue. The first part of the thread process is:

{
AFX_MANAGE_STATE(AfxGetStaticModuleState());

// Cast the data.
CThreadFunction* pFunction = reinterpret_cast<cthreadfunction*>(pData);

// Assert it is the correct type.
ASSERT_KINDOF(CThreadFunction, pFunction);

// Do the work.
UINT uError = pFunction->DoFunction();

...

However when I examine pFunction in the memory window, the memory looks to be " .Anywhere.dll _AFX_MANAGE_STATE.." so the pointer is definately not pointing to the correct address.

Any ideas?

Dave Kerr
codechamber@hotmail.com
http://www.codechamber.com

picture

ashish dogra30-Jun-06 0:36

ashish dogra

30-Jun-06 0:36

hi all
plz tell me how can i place a picture
(image ) on buton control in
mfc dialog bsed application
plz send some example

Ashish Dogra
MCA
Noida

Sarath C30-Jun-06 0:46

Sarath C

30-Jun-06 0:46

Skinning Controls[^]

You can use CBitmapButton for that same. Check MSDN for more information.

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."
My Blog | Understanding State Pattern in C++

_AnsHUMAN_ 30-Jun-06 0:55

_AnsHUMAN_

30-Jun-06 0:55

TO put an image on the button instead of making the variable of CButton type create it as CBitmapButton and use LoadBitmap to set the image on the button.;

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Hamid_RT30-Jun-06 1:13

30-Jun-06 1:13

like this
CButton m_BitmapButton;
m_BitmapButton.Create("Test",BS_BITMAP|WS_CHILD|WS_VISIBLE,CRect(0,40,150,63),this,1);
m_BitmapButton.SetBitmap((HBITMAP)LoadImage(NULL,"c:\\0.bmp",IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE|LR_CREATEDIBSECTION));

whitesky

yogendra kaushik30-Jun-06 1:56

yogendra kaushik

30-Jun-06 1:56

ok sir but i declare this code in OnInitDialog() function
now it does not show any picture
and plz tell me my picture is .jpg so plz tellme where this code is declared
and how to show that picture
plz...............sir

Please mail me

Viorel.30-Jun-06 2:26

Viorel.

30-Jun-06 2:26

I am afraid the LoadImage function from the pervious sample cannot work with JPEG file and accept BMP files only. Therefore you should check the code using some BMP file.

If it works, you have to convert your image to BMP format. For this purpose I think you can use Save As command of the Paint system accessory. Or see if Visual Studio can be used for this.

Hamid_RT30-Jun-06 2:34

30-Jun-06 2:34

one way <CImage class>

whitesky

Hamid_RT30-Jun-06 2:33

30-Jun-06 2:33

You dont need to create i created for this that i show this code
if you have one button set bitmap in property form button in property window or use
m_Button.ModifyStyle(0,BS_BITMAP);
(Jpg)->not problem use CImage class
and see

<br />
m_BitmapButton.Create(_T("Test"),BS_BITMAP|WS_CHILD|WS_VISIBLE,CRect(0,40,150,63),this,1);<br />
CImage m_Image;<br />
m_Image.Load(_T("e:\\0.jpg"));<br />
m_BitmapButton.SetBitmap(m_Image.Detach());<br />

//include AtlImage.h

whitesky

how we get the path of a file

David Crow30-Jun-06 2:31

David Crow

30-Jun-06 2:31

See here.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

happy_ram30-Jun-06 0:34

30-Jun-06 0:34

Sarath C30-Jun-06 0:48

Sarath C

30-Jun-06 0:48

Are you trying to browse for a file?

for that purpose use CFileDialog

CFileDialog d(true);
d.DoModal();
CString strPath = d.GetPathName();

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."
My Blog | Understanding State Pattern in C++

happy_ram30-Jun-06 1:08

30-Jun-06 1:08

no, what i want is i have filename and i want the path of the file name.
so that i can use this path .
ram

_AnsHUMAN_ 30-Jun-06 1:13

_AnsHUMAN_

30-Jun-06 1:13

What problem are you facing using the GetFullPathName() as I suggest in my post?

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Hamid_RT30-Jun-06 1:15

30-Jun-06 1:15

How to get this file?

whitesky

happy_ram30-Jun-06 1:27

30-Jun-06 1:27

i have file name and i want to do get the path of the file name.so that i can play a song
ram.

Hamid_RT30-Jun-06 2:03

30-Jun-06 2:03

You have a filename ok.(Test.mp3) but when you run your program how to get this file?if you can read this you can get path unless you want to save this file in your program

whitesky

happy_ram30-Jun-06 2:24