Re: Threading STL Queue - C / C++ / MFC Discussion Boards

Arrin28-Jul-09 3:52

28-Jul-09 3:52

Hi,
if i debug my application, and want to close them, i receive sometimes this strange error in

// Disconnect connection
void CDatabase::Close()
{
	ASSERT_VALID(this);

	// Close any open recordsets
	AfxLockGlobals(CRIT_ODBC);
	TRY
	{
		while (!m_listRecordsets.IsEmpty())
		{
			CRecordset* pSet = (CRecordset*)m_listRecordsets.GetHead();
			pSet->Close();  // will implicitly remove from list
			pSet->m_pDatabase = NULL;
		}
	}
	CATCH_ALL(e)
	{
		AfxUnlockGlobals(CRIT_ODBC);
		THROW_LAST();
	}
	END_CATCH_ALL
	AfxUnlockGlobals(CRIT_ODBC);

	if (m_hdbc != SQL_NULL_HDBC)
	{
		RETCODE nRetCode;
		AFX_SQL_SYNC(::SQLDisconnect(m_hdbc)); // here is error???
		AFX_SQL_SYNC(::SQLFreeConnect(m_hdbc));
		m_hdbc = SQL_NULL_HDBC;

		_AFX_DB_STATE* pDbState = _afxDbState;

		AfxLockGlobals(CRIT_ODBC);
		ASSERT(pDbState->m_nAllocatedConnections != 0);
		pDbState->m_nAllocatedConnections--;
		AfxUnlockGlobals(CRIT_ODBC);
	}
}

But the best is i dont habe any kind of database in my project included????
Does any one have a answer for this issue???

thanks for any help!
Arrin

Re: Strange error in CDatabase::Close()???

«_Superman_»28-Jul-09 4:00

«_Superman_»

28-Jul-09 4:00

Look at the call stack and you can figure out the sequence of functions that are being called.
From this you can understand how the control reached that particular function.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Strange error in CDatabase::Close()???

Arrin28-Jul-09 4:03

Arrin

28-Jul-09 4:03

Hi,
thanks for answer!!

arrin

Window TopMost window on top???

Arrin28-Jul-09 3:39

Arrin

28-Jul-09 3:39

Hello community,
how to create a second window that is always on top of a main window,
so if i click on the main window that this pop up window stay on top until my function is finished??!?
I create a simple dialog with the resource editor and set "Set Foreground" to true,
but even if i click on the main dialog this new little dialog is in the background, how to avoid this?
If i set "Topmost" to true, than is my pop up dialog always on top, but for all other windows too,
and i like that hi is only for my main dialog in the foreground!?

Thanks for help
Arrin

EDIT: after i show my child dialog and bring him to top i disable my main dialog to make him unklickable and when my funktion is finished i enable him again,
but im not sure that this is the right way!?

// in my funktion:
dlgProgress.ShowWindow(SW_SHOW);
dlgProgress.SetForegroundWindow();
EnableWindow(FALSE); // for main dialog
// after funktion:
EnableWindow(TRUE); // for main dialog

Re: Window TopMost window on top???

«_Superman_»28-Jul-09 3:51

«_Superman_»

28-Jul-09 3:51

Looks like you need a modal dialog.
If you're using MFC, call CDialog::DoModal[^].
Otherwise call DialogBox[^].

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Window TopMost window on top???

john john mackey28-Jul-09 11:37

john john mackey

28-Jul-09 11:37

I may have had a similar problem back several months ago. I have a modeless PropertySheet (a modeless tabbed dialog window) separate from my main Doc-View window.

I created my modeless PropertySheet window:

<br />
// Modeless property sheet - with parent window as such and call to SetWindowPos() allows for property sheet to be on top<br />
m_pSettings->Create(this, WS_SYSMENU | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | DS_MODALFRAME | DS_CONTEXTHELP, WS_EX_DLGMODALFRAME);<br />
m_pSettings->SetWindowPos(this,0,0,0,0,SWP_NOMOVE | SWP_NOSIZE);<br />

I do recall that there was something special to this (modeless property sheet) and the peeps here helped me out!

Threading STL Queue

RS.Ratheesh28-Jul-09 1:40

RS.Ratheesh

28-Jul-09 1:40

Hi,

I pushed some string values in to the STL Queue.
Now i need to pop the values from that queue using thread in MFC application.

Thanks,
Ratheesh.

Re: Threading STL Queue

CPallini28-Jul-09 1:43

CPallini

28-Jul-09 1:43

ratheeshnair123 wrote:
I pushed some string values in to the STL Queue.
Now i need to pop the values from that queue using thread in MFC application.

Nice to know. And what is the question?

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: Threading STL Queue

RS.Ratheesh28-Jul-09 2:02

RS.Ratheesh

28-Jul-09 2:02

Hi,

i am using MFC application in this application i need to display the received messages from the server (may be a chance for receiving more than one messages at a time) i need to display the received and send messages in the Listbox.
i tried it in normal way, but the UI getting freezed after some time. I can able to log that message. So i tried it in some other way, like using queue
the received messages are added in the queue and at thet time timer is running and one thread will pop the pushed messages in to the ListBox.

Using thread how can i get the pushed value?

Thanks,
Ratheesh.

Re: Threading STL Queue

CPallini28-Jul-09 2:38

CPallini

28-Jul-09 2:38

You should add the messages to the queue using a worker thread, then notify it to the GUI thread (using, for instance PostMessage). The GUI thread eventually pops messages from the queue and displays them. of course you've to lock in same way queue access.
Smile | :)

Re: Threading STL Queue

Maximilien28-Jul-09 3:16

Maximilien

28-Jul-09 3:16

it's probably not safe AS-IS. (stl is not by design thread-safe)

I suggest you implement a simple synchronization mechanism (see Thread Synchronization for Beginners[^] )

This signature was proudly tested on animals.

Message Closed

28-Jul-09 1:04

Dane Marcelo

28-Jul-09 1:04

Message Closed

Re: CppDepend: C++ tool for architect

Garth J Lancaster28-Jul-09 1:24

Garth J Lancaster

28-Jul-09 1:24

thats nice .. but you might have missed the fact this is primarily a SOURCE CODE/PROBLEM SHARING SITE .. so if you wish to advertise your product, please pay for doing so !!!

'g'

Re: CppDepend: C++ tool for architect

CPallini28-Jul-09 1:44

CPallini

28-Jul-09 1:44

May I politely ask you to avoid advertising in this forum?
Smile | :)

Re: CppDepend: C++ tool for architect

Dane Marcelo28-Jul-09 5:04

Dane Marcelo

28-Jul-09 5:04

Sorry, the goal is not to add spams to CodeProject but to contribute to encourage developers to focus more in design ( a free version is sufficient for many c++ projects to detect design problems).

anywhay i deleted the message.

falconI

Re: [Message Deleted]

ThatsAlok28-Jul-09 23:35

ThatsAlok

28-Jul-09 23:35

Humm ? what are you saling anyways?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

How can get crashing locations of exe?

Le@rner28-Jul-09 0:57

Le@rner

28-Jul-09 0:57

Hi all,

I m creating my application MFC,When i run this application on my PC than its working fine,but when i run this application on diffrent PC than its crash at many diffrent locations.

Please can u tell me how can i get crashing location of application.

is there any software or utility which helps me?

please help me for this.

thanks in advance.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: How can get crashing locations of exe?

Iain Clarke, Warrior Programmer28-Jul-09 2:26

Iain Clarke, Warrior Programmer

28-Jul-09 2:26

Read this article very carefully:
http://www.flounder.com/debug_release.htm[^]

It lists many common errors that show up in Release rather than Debug mode, and also how to add symobols so you can work out where things are actually crashing.

As for "many different locations", then try and get just one location at a time by being very consistent in how you get to the crash.

Good luck,

Iain.

I have now moved to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), or need cotract work done, give me a job! http://cv.imcsoft.co.uk/[^]

Re: How can get crashing locations of exe?

_AnsHUMAN_ 28-Jul-09 2:32

_AnsHUMAN_

28-Jul-09 2:32

Use Process Dumper tool to get the dump file and analyze it.

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: How can get crashing locations of exe?

«_Superman_»28-Jul-09 3:45

«_Superman_»

28-Jul-09 3:45

Create a crash dump and send it. Will try and analyze it.

Check this link to create a crash dump - Capturing Application Crash Dumps[^]

«_Superman_»
I love work. It gives me something to do between weekends.

Re: How can get crashing locations of exe?

Randor 28-Jul-09 5:43

Randor

28-Jul-09 5:43

The name of the module and the offset of the exception will be in the users Application Log of the event viewer. Although a crash dump is certainly useful there is no reason to create one.

How to view and manage event logs in Event Viewer in Windows XP[^]

You can use WinDbg to find the corresponding code if you have saved your symbols. It is very important that you use the same symbols at the time of the Release build otherwise you will not find the correct crash location.

Debugging Tools for Windows - Overview[^]

Best Wishes,
-David Delaune

STL Queue in MFC

RS.Ratheesh28-Jul-09 0:53

RS.Ratheesh

28-Jul-09 0:53

Hi,

Can i use STL queue in MFC application?
How can i use it in my application?

Thanks,
Ratheesh.

Re: STL Queue in MFC

Garth J Lancaster28-Jul-09 1:20

Garth J Lancaster

28-Jul-09 1:20

of course you can ...

#include <queue>

see http://www.cplusplus.com/reference/stl/queue/[^] for examples (click on the member funtions on the left hand side of the page)

'g'

Cannot open type library file: 'msxml4.dll': No such file or directory

Ash_VCPP28-Jul-09 0:45

Ash_VCPP

28-Jul-09 0:45

Hi All,

i am importing msxml4.dll but i am getting this error:-

"fatal error C1083: Cannot open type library file: 'msxml.dll': No such file or directory"

even though it is present in windows\system32 and i registered it from there.Please help me.

Thanks A Ton
Ash_VCPP
walking over water is just knowing where the stones are.....

How to bind a LPCTSTR property to a EditBox in property page? [modified]

daCrazyDude27-Jul-09 23:14

daCrazyDude

27-Jul-09 23:14

Hi guys

I have a LPCTSTR property in an activex control I'm designing. (I can't change the property to CString or something else unfortunately)

How do I exchange this property with a EditBox control in the property box? I can't just use a CString, even though DDP_Text function asks for a CString type variable. .

m_CaptionText is CString type *value* variable, set for the EditBox control (IDC_CAPTIONTEXT). CaptionText is the property name.

DDP_Text(pDX, IDC_CAPTIONTEXT, m_CaptionText, _T("CaptionText"));
DDX_Text(pDX, IDC_CAPTIONTEXT, m_CaptionText);

Any help would be highly appreciated.

Cheers

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.