C / C++ / MFC Discussion Boards

Iain Clarke, Warrior Programmer18-Jan-09 23:30

18-Jan-09 23:30

CPallini wrote a very nice version of "Tough".

The serialisation mechanism is very good for simple objects, but I've found it to be very fragile when you want to do any real work. I know others here disagree with me on this though!

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Re: Constructors and Serialization

BobInNJ19-Jan-09 6:09

BobInNJ

19-Jan-09 6:09

Thanks for the responses. It seems to me that the MFC serialization approach is less then ideal. I solved the problem by making the argument to the constructor optional. This is also less than ideal it gets the job done.

Bob

poolObject

rini2518-Jan-09 7:51

rini25

18-Jan-09 7:51

i have a question of how to creat a poolObject
this is the code :
template<class t="">
class objectPool : public GenericObjectPool
{
static objectPool<t> *thePool;
static void createPool()
{
thePool = new objectPool<t>();
//here we need to create the pool itself ...
//or in the c'tor of the parent ..
//the register could happen in the c'tor of the parent
//but we either do it here
....
}
}
can someone help me ?

Re: poolObject

Stuart Dootson18-Jan-09 8:29

Stuart Dootson

18-Jan-09 8:29

Sorry - where does GenericObjectPool come from? It's not from MFC, that's for sure...

Re: poolObject

Radhakrishnan G.19-Jan-09 4:34

Radhakrishnan G.

19-Jan-09 4:34

I think its better to user a Singlton class if you need only one Object pool and create the Pool in its constructor.

If you need multiple object pool use a Class Factory. any way you can create pool in its constructor.

What is the GenericObjectPool, and what it does?

Win32 API function for getting the hardware details

aaasrgm18-Jan-09 4:01

aaasrgm

18-Jan-09 4:01

Hai,
Please tell me how can i obtain the list of hardware installed in a particular system using Win32 API using VC++. I know that all the information about the system such as memory management, file management are present in WIN32API. But i am not able to obtain those info. I visited msdn. But i just need an idea of how to program using the available info.

Re: Win32 API function for getting the hardware details

Jonathan Davies18-Jan-09 4:16

Jonathan Davies

18-Jan-09 4:16

SetupAPI provides methods for getting hardware details. Have a look at that.

Re: Win32 API function for getting the hardware details

aaasrgm18-Jan-09 4:32

aaasrgm

18-Jan-09 4:32

Thank You..I looked at it..But i am doing a project on obtaining these info from system using C functions and Win32 API functions. I need the functions so that i can proceed with my work. I am a novice in this area. Smile | :)

Re: Win32 API function for getting the hardware details

Jonathan Davies18-Jan-09 4:57

Jonathan Davies

18-Jan-09 4:57

You could obtain information from the registry such as that under HKEY_LOCAL_MACHINE/System/Enum/, though it may be hard work to do so depending on how much information you want. Though be careful not change anything in the registry!

Re: Win32 API function for getting the hardware details

Randor 19-Jan-09 4:31

Randor

19-Jan-09 4:31

aaasrgm wrote:
But i am doing a project on obtaining these info from system using C functions and Win32 API functions

Setup API is a Win32 API.

Just add:

#include <setupapi.h>
#include <spapidef.h>

#ifdef _MSC_VER
	#pragma comment(lib, "Setupapi.lib")
#endif

It will even work from a console application.

Best Wishes,
-David Delaune

Re: Win32 API function for getting the hardware details

Jijo.Raj18-Jan-09 6:57

Jijo.Raj

18-Jan-09 6:57

Have a look at this article[^].

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

error 0xD0000022 when writing minidump

Green Fuze18-Jan-09 3:21

Green Fuze

18-Jan-09 3:21

Hey everybody

I'm trying to write a dump using MiniDumpWriteDump(), the function fails with the error 0xD0000022.

I'm trying to find out what that error means, but I can't find anything about that error code.

Does anyone know what it means?

Thanks!

Re: error 0xD0000022 when writing minidump

krmed18-Jan-09 3:28

krmed

18-Jan-09 3:28

Did you see this in MSDN?

Return Values
If the function succeeds, the return value is TRUE; otherwise, the return value is FALSE. To retrieve extended error information, call GetLastError. Note that the last error will be an HRESULT value.

If the operation is canceled, the last error code is HRESULT_FROM_WIN32(ERROR_CANCELLED).

Perhaps you should call GetLastError

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: error 0xD0000022 when writing minidump

Green Fuze18-Jan-09 20:42

Green Fuze

18-Jan-09 20:42

Hey, thanks!
And yeah, I did saw it...

Finally I found someone who asked about this problem (in another forum).
He said that newer versions of dbghelp.dll must be used (it seems I didn't use the latest version).

More over, that for full dump (what I want), if the OS failed to make a screenshot, it auto-retries and if failed again,
it simply fails the who process.

Re: error 0xD0000022 when writing minidump

Sauce!18-Jan-09 21:13

Sauce!

18-Jan-09 21:13

Alternatively, pause your application from within visual studio (I'm assuming that's your IDE of choice) and add a new watch value of "@err, hr"

Strange file not found exception

George_George18-Jan-09 2:41

George_George

18-Jan-09 2:41

Hello everyone,

I am writing a managed console application which will invoke native C++ COM DLL on Windows Server 2003 x64 using PIA interop. The managed console application is built for "Mixed Platform" debug version and the native COM DLL is built for x64 debug version. I am using interop to invoke method from managed code which are exposed from COM code.

I find creating a COM coclass object in managed code is ok, and it is also ok to call some methods of COM coclass from managed code using the created coclass object instance. But when I call into a specific method Abc (Abc is implemented/exposed in COM DLL) from my managed code (FooImpl.dll), there is exception like this, I am so confused that I did not write any method called "XmlSerializers". Any ideas to debug further?

(FooImpl is my managed code DLL which will call COM native code, my managed code console application linked with FooImpl.dll.)

--------------------
An unhandled exception of type 'System.IO.FileNotFoundException' occurred in FooImpl.dll
Additional information: Could not load file or assembly 'FooImpl.XmlSerializers, Version=1.0.1121.1, Culture=neutral, PublicKeyToken=null' or one of its dependencies.

The system cannot find the file specified.
--------------------

regards,
George

Re: Strange file not found exception

Hamid_RT22-Jan-09 23:25

Hamid_RT

22-Jan-09 23:25

George_George wrote:
An unhandled exception of type 'System.IO.FileNotFoundException'

It seems you dont have the file and it refers to it.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: Strange file not found exception

George_George4-Feb-09 22:39

George_George

4-Feb-09 22:39

Thanks Hamid,

I finally found the root cause is, the application is built for mixed platforms and the DLL is built for x64. When I change them both to x64, it is fine. Smile | :)

regards,
George

Re: Strange file not found exception

Hamid_RT5-Feb-09 21:51

Hamid_RT

5-Feb-09 21:51

Thanks for your answer.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: Strange file not found exception

George_George7-Feb-09 2:10

George_George

7-Feb-09 2:10

Glad to share experience. Smile | :)

regards,
George

displaying data in infinite loop

l_d17-Jan-09 15:53

l_d

17-Jan-09 15:53

i am writing some code in c like
while(1)
{
printf("Hello");
}
how can i display in the same in an edit box using vc++

thanks

Re: displaying data in infinite loop

David Crow17-Jan-09 16:12

David Crow

17-Jan-09 16:12

l_d wrote:
how can i display in the same in an edit box using vc++

Use SetWindowText().

"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

Re: displaying data in infinite loop

l_d17-Jan-09 16:33

l_d

17-Jan-09 16:33

But i want to diplay in while(1) i.e
infinite loop which i am not able to do.

Re: displaying data in infinite loop

bob1697217-Jan-09 17:42

bob16972

17-Jan-09 17:42

/* Assumes a Visual C++ 6.0 wizard generated dialog based application
with a multiline edit control.
*/

// .h file
CEdit m_editControl;
UINT m_Timer;

// .cpp file
BOOL CTest263Dlg::OnInitDialog()
{
CDialog::OnInitDialog();

// ****************************
// Other wizard generated code
// ****************************

// TODO: Add extra initialization here
m_Timer=(UINT)SetTimer(1,100,NULL);

return TRUE;
}

void CTest263Dlg::AddMessage(CString sMessage)
{
sMessage+="\r\n"; // Add carriage return linefeed pair

// Assuming a dialog based app with a multiline edit control
m_editControl.SetSel(0,-1);
m_editControl.SetSel(-1,-1); // Set caret to end of existing text
m_editControl.ReplaceSel(sMessage); // Append new message
}

void CTest263Dlg::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default

if (nIDEvent==m_Timer) {
AddMessage("I can't frackin' believe that she was the 12th Cylon");
}

CDialog::OnTimer(nIDEvent);
}

Re: displaying data in infinite loop

Maximilien18-Jan-09 1:16

Maximilien

18-Jan-09 1:16

bob16972 wrote:
AddMessage("I can't frackin' believe that she was the 12th Cylon");

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