How to locate the code which was "Detected memory leaks!" - C / C++ / MFC Discussion Boards

Re: What device context methods are available to Crichedit

karle8-May-10 4:00

8-May-10 4:00

I didn't get you real question!
CRichEditCtrl is a control an displays its content in the wm_paint event to the paint dc.
Only if the control should calculate sizes or draw it's content a device context is needed.
If you require a "WYSIWYG" you should apply the device context of the desired device.
If you want to calculate the size or want to draw it to a context you have to call FormatRange Method and apply the deviceContext of the target device to the formatrange structure.

If you want to learn, how richeditctrl realy works, see MSDN : Rich Edit Control Examples[^]

Re: What device context methods are available to Crichedit

ForNow8-May-10 15:38

ForNow

8-May-10 15:38

Thought if you wanted to CDC::SetTextColor you would need need ther Device COntext but like you said in a Earlier post you can use

SetCharformat for that

Receive data from server into CString

mesajflaviu7-May-10 6:14

mesajflaviu

7-May-10 6:14

How can receive data from server , with Windows Sockets recv(SOCKET s,char FAR* buf,int len,int flags); function , into CString object ? Here is my trial :

BOOL CSmtp::ReceiveData()
{
	if(recv(m_hSocket,&m_sRecvBuf,m_sRecvBuf.GetLength(),0) == SOCKET_ERROR)
	{
		m_nError = CSMTP_WSA_RECV;
		return FALSE;
	}

	return TRUE;
}

m_sRecvBuf is member CString data

Re: Receive data from server into CString

CPallini7-May-10 7:13

CPallini

7-May-10 7:13

Supposing you are doing a ANSI build, this is one of the rare occasion where GetBuffer method is appropriate, for instance:

...
int result = recv( m_hSocket, m_sRecvBuf.GetBuffer(N), N, 0);
m_sRecvBuf.ReleaseBuffer();
if(result == SOCKET_ERROR)
{
..
}
...

where N is the number of requested bytes (number of your choice).
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.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Receive data from server into CString

mesajflaviu7-May-10 7:16

mesajflaviu

7-May-10 7:16

Seems to work ! Smile | :)

BOOL CSmtp::ReceiveData()
{
	if(recv(m_hSocket,m_sRecvBuf.GetBuffer(1024),1024,0) == SOCKET_ERROR)
	{
		m_nError = CSMTP_WSA_RECV;
		return FALSE;
	}

	m_sRecvBuf.ReleaseBuffer();

	return TRUE;
}

Re: Receive data from server into CString

CPallini7-May-10 7:19

CPallini

7-May-10 7:19

I've modified my previous reply: you should call ReleaseBuffer when the recv fails too.
Smile | :)

Re: Receive data from server into CString

mesajflaviu7-May-10 8:05

mesajflaviu

7-May-10 8:05

You are right , I will modified ! Thanks !

How to locate the code which was "Detected memory leaks!"

transoft7-May-10 3:19

transoft

7-May-10 3:19

Hi
After I exited my APP, I always found following message:

Detected memory leaks!
Dumping objects ->
{201} normal block at 0x003BFEE0, 52 bytes long.
Data: < ; ; ; > E0 FE 3B 00 E0 FE 3B 00 E0 FE 3B 00 CD CD CD CD
{200} normal block at 0x003BFE88, 28 bytes long.
Data: < > 00 00 00 00 CD CD CD CD CD CD CD CD CD CD CD CD
Object dump complete.

How can I locate them?

Best regards,

Re: How to locate the code which was "Detected memory leaks!"

Electron Shepherd7-May-10 3:30

Electron Shepherd

7-May-10 3:30

See http://support.microsoft.com/kb/151585[^]

Server and Network Monitoring

Re: How to locate the code which was "Detected memory leaks!"

transoft7-May-10 4:14

transoft

7-May-10 4:14

Thank you for your reply. Is there any other software can detect potential memory leaks in the code?

Best regards,

Re: How to locate the code which was "Detected memory leaks!"

Electron Shepherd7-May-10 4:16

Electron Shepherd

7-May-10 4:16

There's lots of commercial products (BoundsChecker springs to mind).

Server and Network Monitoring

Re: How to locate the code which was "Detected memory leaks!"

transoft7-May-10 4:16

transoft

7-May-10 4:16

Is there a free one? Is there a VS built-in tool for use?

Re: How to locate the code which was "Detected memory leaks!"

Maximilien7-May-10 5:07

Maximilien

7-May-10 5:07

have a look at this (Visual Leak Detector)[^]

Max.

Watched code never compiles.

Re: How to locate the code which was "Detected memory leaks!"

C^hris L^osinger7-May-10 5:02

C^hris L^osinger

7-May-10 5:02

{201} normal block at 0x003BFEE0, 52 bytes long.

that '201' means the 201st allocation is the one that caused the leak. if the leak always appears with that '201', then you can use _CrtSetBreakAlloc to cause an assertion when that alloc happens - and then you can work back up the call stack to see where the allocation happened.

so, put _CrtSetBreakAlloc(201); somewhere early in your application's initialization (i always put it in my C*App::InitInstance), run your app, and wait for the assert.

image processing toolkits | batch image processing

Re: How to locate the code which was "Detected memory leaks!"

Fareed Rizkalla7-May-10 8:33

Fareed Rizkalla

7-May-10 8:33

If your running Visual Studio 2010 the trial!
Go to the Analyze menu, select Run Code Analysis on Only <your project="" name="">!

Get the ipaddress of a system which remotely logged into my system

narayanagvs7-May-10 3:10

narayanagvs

7-May-10 3:10

Hi,

In my application, I need to check whether my system is remotely connected and if connected
I need to get the ipaddress of the remote system.

Any suggestions or links would be helpful.

Thanks
Satya

Today is a gift, that's why it is called the present.

Re: Get the ipaddress of a system which remotely logged into my system

David Crow7-May-10 3:48

David Crow

7-May-10 3:48

Have you tried NetWkstaUserEnum()?

"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

How to handle exception from function as we not develope that fuction() and dont kno what type of exception it will throw

ashish8patil7-May-10 0:17

ashish8patil

7-May-10 0:17

Hello All,

consider following code

try
{
function();

}

catch(//what typr should expect)
{

}

fuction is develope from other one and he not mention the type of exception he returning..

/////////////////////////////////////////////////////
if i use this code

catch(std::exception & s)
{
cout<<s.what();

}

i get error in vs2008

Error is :--

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

Please help ,
thanks.

Re: How to handle exception from function as we not develope that fuction() and dont kno what type of exception it will throw

tolw7-May-10 0:36

tolw

7-May-10 0:36

Use:

try
{
}
catch(...)
{
}

To catch all exception types. Good luck!

Re: How to handle exception from function as we not develope that fuction() and dont kno what type of exception it will throw

ashish8patil7-May-10 2:21

ashish8patil

7-May-10 2:21

Thanks for Reaply,

But how can I get type of thown exception.

whether he is throwing int,char*,of any user define data type.

So that I can Identify what type of execption is occur.

Re: How to handle exception from function as we not develope that fuction() and dont kno what type of exception it will throw

Stuart Dootson7-May-10 2:37

Stuart Dootson

7-May-10 2:37

You can't...I would suggest you don't use a function if you don't know what its public interface is...and it's exception throwing habits are part of that public interface, so don't use this one...

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

Re: You left out the <code>throw() </code>operand

Software_Developer7-May-10 1:28

Software_Developer

7-May-10 1:28

You left out the throw() operand.
Throw tells the compiler that a function could throw an exception and the catch() operand and catches (handles) the exception thrown by the throw() operand.

char *buf;<br />
   try {<br />
      buf = new char[512];<br />
      if( buf == 0 )<br />
         throw "Memory allocation failure!";<br />
   }<br />
   catch( char * str ) {<br />
      cout << "Exception raised: " << str << '\n';<br />
   }

Code Review Checklist

elizas7-May-10 0:02

elizas

7-May-10 0:02

1.Are all the conditional paths reachable?
2.Are all the individual conditions in a complex conditions separately evaluated?
3.If there is a nested IF statement, are the THEN and ELSE parts appropriately delimited?
4. In the case of a multi-way branch like SWITCH/CASE statement, is a default clause provided? Are the breaks after each CASE appropriates?
5.Is there any part of code that is unreachable?
6.Are there any loops that will never execute?
7.Are there any loops where the final condition will never be met and hence cause the program to go into an infinite loop?
8.What is the level of nesting of the conditional statements? Can the code be simplified to reduce complexity?

http://www.mindfiresolutions.com/Code-Review-Checklist-238.php[^]

Cheers,
Eliza

Re: Code Review Checklist

LittleYellowBird7-May-10 0:20

LittleYellowBird

7-May-10 0:20

Quote from your profile .... Biography: I am in the marketing team at Mindfire Solution.

Is that whay you have not asked a proper question and have a link to your website ....... ? Roll eyes | :rolleyes:

Ali

rtd server

trioum7-May-10 0:01

trioum

7-May-10 0:01

I have a grid in which data in cells is updating in milisecond. Now I want to reflect these change in excel file . so I tried rtd server for this purpose . what documentation is available in c#.net , I want to implement in MFC because whole of application in MFC. how Can I achieve the task of rtd server in MFC

Trioum

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