Re: Object in a Regular DLL - C / C++ / MFC Discussion Boards

Re: Thread paused

CPallini19-Jan-10 1:54

CPallini

19-Jan-10 1:54

Uh?!
OP missed?
Big Grin | :-D

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: Thread paused

Adam Roderick J18-Jan-10 0:18

Adam Roderick J

18-Jan-10 0:18

I prefer you to read chapter 2. Processes and threads from "Modern Operating Systems" by Andrew S Tannenbaum.
It will be useful for you.

Величие не Бога может быть недооценена.

Re: Thread paused

Covean18-Jan-10 1:02

Covean

18-Jan-10 1:02

Can you please post your threads code to see if they are waiting for some reason.

Edit: Did some typo.

Greetings
Covean

Re: Thread paused

susanne118-Jan-10 1:16

susanne1

18-Jan-10 1:16

void CMyThread::ThreadStart()
{
if (m_pSelThread != NULL) // CWinThread* m_pSelThread;
{
if (::WaitForSingleObject(m_pSelThread->m_hThread, 0) != WAIT_OBJECT_0)
return;

delete m_pSelThread;
m_pSelThread = NULL;
}

m_pSelThread = AfxBeginThread((AFX_THREADPROC)ThreadFunction, this, THREAD_PRIORITY_NORMAL, 0,CREATE_SUSPENDED);

m_pSelThread->m_bAutoDelete = FALSE;

m_pSelThread->ResumeThread();
}

UINT CMyThread::ThreadFunction
(
LPVOID param
)
{
while(!bTerminate) // bool bTerminate
{
if ((::WaitForSingleObject(m_Sel_End_Event, 0) == WAIT_OBJECT_0))
{
bTerminate = true;
continue;
}
}

Re: Thread paused

Covean18-Jan-10 1:49

Covean

18-Jan-10 1:49

I couldn't find any reason why your thread pauses for 3-5 seconds.
But your "main loop" is a kind of resource-eating.
Do you really meant to use a timeout of 0 to wait for this object?
0 timeout means to check the signaled state of the waitable handle
and to return immediately. So your loop will iterate very very fast and
consumes nearly 100% processing time.

UINT CMyThread::ThreadFunction(LPVOID param)
{
    while(!bTerminate) // bool bTerminate 
    {
        if ((::WaitForSingleObject(m_Sel_End_Event, 0) == WAIT_OBJECT_0))
        {
            bTerminate = true; 
            continue;
        } 
    }
}

But as I said before this doesn't solve your problem. Is there maybe more code you can provide?
By the way you also use the 0 timeout also in your ThreadStart function (but there it shouldn't be
a problem).

Greetings
Covean

Object in a Regular DLL

Lazzari Patrizio17-Jan-10 22:20

Lazzari Patrizio

17-Jan-10 22:20

Hi to everybody.

I have used a Regular DLL in VC++ (ver 6.0) but i have some problems when i use the object.
I have create a new object:

"CObOggetto*pOggettoDaRibaltare = new CObOggetto;"

but when i try to use the variables into the object ...

pOggetto->m_sCodiceContratto = "000001";

the application crash like a the pointer is not allocated!!!
The variables are all CString.

Can you help me???

Hi! I'm very happy to talk with everybody about VC++.

Re: Object in a Regular DLL

Lazzari Patrizio17-Jan-10 22:23

Lazzari Patrizio

17-Jan-10 22:23

Sorry!!!

The code are this:

"CObOggetto*pOggetto = new CObOggetto;"

but when i try to use the variables into the object ...

pOggetto->m_sCodiceContratto = "000001";

Can you help me???

Hi! I'm very happy to talk with everybody about VC++.

Re: Object in a Regular DLL

Cedric Moonen17-Jan-10 22:32

Cedric Moonen

17-Jan-10 22:32

You will need to give a lot more information. The fact that the object is created and used within the DLL is not a problem. So, make sure that the object is not destroyed after you allocated it and that you are manipulating the same object.

Could you post some more relevant piece of code ?

Just a guess: is this pOggetto variable a member of another object, or is it local to a function (created, used and then destroyed at the end of the function) ? I would guess that you are declaring a class variable and then creating a variable with the same name in a function (which of course would leave the class variable unitialized).

Cédric Moonen
Software developer

Charting control [v3.0 - Updated]
OpenGL game tutorial in C++

Re: Object in a Regular DLL

KingsGambit17-Jan-10 22:33

KingsGambit

17-Jan-10 22:33

Can you debug and check if pOggetto is NULL?

Re: Object in a Regular DLL

Lazzari Patrizio17-Jan-10 22:35

Lazzari Patrizio

17-Jan-10 22:35

Hi

Yes. The pointer is null.

Hi! I'm very happy to talk with everybody about VC++.

Re: Object in a Regular DLL

KingsGambit17-Jan-10 23:03

KingsGambit

17-Jan-10 23:03

It is crashing because the program is accessing a member variable by using a NULL pointer. So, the question is why new is returning a NULL pointer. Is the class constructor is trying to allocate a very large block of memory which the system cannot satisfy?

Can you check (debug into) CObOggetto's constructor and see what it does?

Re: Object in a Regular DLL

Nelek17-Jan-10 22:37

Nelek

17-Jan-10 22:37

Hi, first of all, you can edit you first message to correct possible errors, instead of adding a new message.

On the other hand...
Why are you using the "" when you create the pointer? Is it a typo? Or are you really using them in your code?

I recommend you to take a look onhttp://www.codeproject.com/KB/DLL/[^]

This user[^] wrote a serie of articles around DLLs that I found quite usefull, check it out as well

Regards.
--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpfull answers is nice, but saying thanks can be even nicer.

Re: Object in a Regular DLL

Lazzari Patrizio17-Jan-10 22:48

Lazzari Patrizio

17-Jan-10 22:48

Ok! Next time i'will edit the message to correct.

For the other hand..
In the project i go to "Insert new class"
Class type : Generic Class
Name : COggetto
Derived from: CObject As Public.

In the .h file i put my variables (are 2 CString)
The in the .cpp i put my code:
COggetto* pOggetto = new COggetto;
pOggetto->m_sCodice = "000001"

When i'm in running i see that the pointer pOggetto is created after the "new" but on the instruction " pOggetto->m_sCodice = "000001"
the project crash.
Thank's for your time!

Hi! I'm very happy to talk with everybody about VC++.

Re: Object in a Regular DLL

CPallini17-Jan-10 22:56

CPallini

17-Jan-10 22:56

Do you mean pOggetto is a valid pointer (Did you check with the debugger?)?
How is declared m_sCodice?
Smile | :)

Re: Object in a Regular DLL

Lazzari Patrizio17-Jan-10 22:58

Lazzari Patrizio

17-Jan-10 22:58

Yes.
m_sCodice is a CString. Ther is another varibles is a m_sDescrizione also a CString.

Hi! I'm very happy to talk with everybody about VC++.

Re: Object in a Regular DLL

CPallini17-Jan-10 23:03

CPallini

17-Jan-10 23:03

Lazzari Patrizio wrote:
Yes.

You said here that such pointer is NULL.
Smile | :)

Re: Object in a Regular DLL

Lazzari Patrizio17-Jan-10 23:06

Lazzari Patrizio

17-Jan-10 23:06

that's ok.

I see on quick watch that the variables on the pointer are null.
Sorry for my statement!

Hi! I'm very happy to talk with everybody about VC++.

Re: Object in a Regular DLL

CPallini17-Jan-10 23:12

CPallini

17-Jan-10 23:12

If pOggetto is null then you should discover why it is such.
Could you use the debugger to step inside the object constructor?
Smile | :)

Re: Object in a Regular DLL

Nelek17-Jan-10 23:43

Nelek

17-Jan-10 23:43

Can you post the beggining of your both COggetto.cpp and COggetto.h (I mean the section of variables, constructor, destructor, operators... but without possible member functions done/added by you)

When you use the Wizard to add classes, it implements some standard things, but most of the times you need to add/modify part of them in order to get your class working ok.

Regards.
--------
M.D.V. Wink | ;)

Re: Object in a Regular DLL

CPallini17-Jan-10 22:52

CPallini

17-Jan-10 22:52

Could you please post the actual code (either the CobOggetto constructor and the pOggetto initialization) using the code block button?
Smile | :)

IAuthenticate - urgent help

YaronNir17-Jan-10 20:52

YaronNir

17-Jan-10 20:52

i am using URLDownloadToCache method, also implemented my own class class CBindStatusCallbackImpl : public IBindStatusCallback for call back and bindings...

i read in the MSDN that in order to support proxy handling i need to handle IAuthenticate and the method Authenticate...problem is i don't know how ?
couldn't find any example code for that

can any1 help me?
i am desperate

thanks in advanced

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: IAuthenticate - urgent help

Garth J Lancaster17-Jan-10 22:22

Garth J Lancaster

17-Jan-10 22:22

this is likely way more complex than you want - but its the only thing I can remember that Ive seen supposedly do it

http://vbmhwb.sourceforge.net/[^]

search for WBAuthenticate on the page

'g'
ps.. Im hoping it shows you the general method, Im not suggesting you can use the actual code here

Re: IAuthenticate - urgent help

YaronNir17-Jan-10 22:51

YaronNir

17-Jan-10 22:51

thanks a lot for your answer...

i couldn't find in the site you gave where to d/l the code that implements the WBAuthenticate...can u direct me or give me direct link please

thanks again

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: IAuthenticate - urgent help

Garth J Lancaster17-Jan-10 22:56

Garth J Lancaster

17-Jan-10 22:56

its a sourceforge site - try googling for

vbMHWB ActiveX Control

and see if you get a hit - I just checked the link and it works for me

'g'

Re: IAuthenticate - urgent help

YaronNir17-Jan-10 22:59

YaronNir

17-Jan-10 22:59

ok now i know which link to press Wink | ;)

thanks again

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

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