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When I delete an array of objects I got 'Invalid Address specified to RtlValidateHeap' when compiling with debug info.
When delete[] is run in debug mode it calls _CrtIsValidHeapPointer(...) and it fails.
So I dug into my code and after a while I found that if I delete an array of objects it fails ONLY if the objects have a destructor ?
Why don't it work? Im doing something wrong ?
Example.
class CData
{
public:
~CData() { }
DWORD nValue;
};This works of cause.
CData* pData = NULL;
pData = new CData;
_CrtIsValidHeapPointer( pData );
delete pData; This Does NOT Work
pData = new CData;
pData = new CLineInfo[ 2 ];
_CrtIsValidHeapPointer( pData );
delete[] pData;
BUT if I remove the Destructor from the CData class. It WORKS !
Strange...
- Mathias S.
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How does it work if instead of
pData = new CData;
pData = new CLineInfo[ 2 ];
you have
pData = new CData[ 2 ];?
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heh That was a typo when writing the message. it should of cause be
pData = new CData[ 2 ];
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This error occurs when you alllocate memory in one heap and delete it in another heap.
Check whether both Debug and Release mode use run time library settings are the same or not .
Appu..
"If you judge people, you have no time to love them."
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I suspected that too. But if I do new and delete right after each other as in the example.
they are run from the same place.
I tryed changing runtime library too. I Have tested with both /MTd and /MDd but with no success.
and If that was the error. Why does it works if I remove the destructor.
It is that part that is messing with my head..
-Mathias S.
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Mathias S. wrote:
BUT if I remove the Destructor from the CData class. It WORKS !
Strange...
Try adding Constructer of CData class..
what is CLineInfo?? Is it derived from CData class.
Knock out 't' from can't,
You can if you think you can
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CLineInfo is what the class is called in my real code. That was a cut'n'paste error 
And it have constructor and a lot of variables im my real code, and I created this example and striped it down until _CrtIsValidHeapPointer did not complain anymore. and that happend when I removed the destuctor.
I can have a Constructer there without any problems, as long as there is no desructor.
-Mathias S.
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Please correct your post to fix the typos you mention in later posts.
Does the CLineInfo overload its operator new for custom heap/caching/allocation purposes? If so, that will likely raise the error because the heap management will be different.
If you are allocating in one file and deleting in another, make sure that all files involved have the #define new DEBUG_NEW (VC++ 6.0) at the top of the file, or you could end up using different heap routines.
Peace!
-=- James
If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
DeleteFXPFiles & CheckFavorites (Please rate this post!)
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No! no overloading of new/delete.
But I must have had som other error that is fixed now, that overwrote the memory or something. because delete[] work now.
But _CrtIsValidPointer still does not work when checking a pointer of an array of objects with a destructors. Because of a bug in CrtIsValidHeapPointer.
but as a workaround I can use
_CrtIsValidHeapPointer( ((LPCBYTE)p)-4 );
- Mathias
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hi ,
whatever function is using. want to pass the string.i am trying from last 5 days but the problem is that code is build properly but i make projectname helloworld and under that i want to pass string but it give "this application has been unloaded to save memory.you must download a new version".and i download new version but the same thing.
Actually i make project helloworld and i want to pass any string in that through emulator.suppose my project is helloworld.so through emulator i want to pass any string under that name.so how can i go and that the process behind that.please help me out.
Thanks........
Nitin dalal
nitin
nitin
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i already checked.is there any option for that.
Thanks
nitin
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NiceNaidu wrote: ve u checked these articles http://www.codeproject.com/threads/#Inter%2DProcess+Communication[^]
BREW and IPC is some kinda different
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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Send me as early as possible
#sankar#
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Where do you want to select the numbers from?
If you want to generate random number's use rand()
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
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sankarRao wrote: Send me as early as possible
Post the description of problem not...
Send me as early as possible 
use the modulas(%) operator with rand() to get the numbers in the range like
int i=rand()%5;<br />
i is between 0 to 4.
Knock out 't' from can't,
You can if you think you can
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hi all plz help me
i want to change color of a particular control on which text is displayed but problem is that when i try folloeing code it will change color only of the text's background but not of all control plz tel me code for this
HBRUSH CAfterone::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
// TODO: Change any attributes of the DC here
pDC->SetBkColor(RGB(0, 0, 0));
// TODO: Return a different brush if the default is not desired
return hbr;
}
Please mail me
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u should return a brush of required color to do that
CBrush bkBrush( RGB(0,0,0));<br />
<br />
<br />
HBRUSH CAfterone::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) <br />
{<br />
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);<br />
<br />
pDC->SetBkColor(RGB(0, 0, 0));<br />
<br />
return bkBrush;<br />
<br />
}
nave
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<br />
CPaintDC dc(this);
dc.SetTextColor(RGB(0,0,200));<br />
dc.TextOutW(10,10,_T("test"),4);<br /> and Here[^]
whitesky
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HBRUSH CAfterone::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
// TODO: Change any attributes of the DC here
if(pWnd->GetDlgCtrlID()==/*Put your control id Here ex IDC_EDIT1*/)
// return your color brush here
// TODO: Return a different brush if the default is not desired
return hbr;
}
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
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i want only to change edit box color not text color
this will change all dialog box coloto black
i want to change only edit control color but not its text color
plz tel me how this possible
Please mail me
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Here's the code snippet : To change only the background color
HBRUSH CTestDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
HBRUSH hBr=CreateSolidBrush (RGB(255,0,0));
if(pWnd->GetDlgCtrlID ()== IDC_EDIT1)
{
pDC->SetBkColor (RGB(255,0,0));
hbr=hBr;
}
return hbr;
}
Is it OK!
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
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yogendra kaushik wrote: i want only to change edit box color not text color
this will change all dialog box coloto black
i want to change only edit control color but not its text color
plz tel me how this possible
The following code changes the color of the all the EDIT controls of the dialog CtestMFCDlg.
HBRUSH CtestMFCDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)<br />
{<br />
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);<br />
if(nCtlColor== CTLCOLOR_EDIT )<br />
hbr=CreateSolidBrush(RGB(0,100,0));<br />
return hbr;<br />
}
Knock out 't' from can't,
You can if you think you can
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A_Laxmanhbr=CreateSolidBrush(RGB(0,100,0));
this will generate handle leake...Isn't it?
nave
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you need to WM_CTLCOLOREDIT message
whitesky
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