Re: loop speed - C / C++ / MFC Discussion Boards

khan++17-Jul-05 23:35

17-Jul-05 23:35

You must have seen in my first post that:
unsigned long id;
or DWORD id;
Please have a look at this MSDN url also:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createthread.asp[^]

this is this.

Re: loop speed

locoone18-Jul-05 0:00

locoone

18-Jul-05 0:00

unsigned long id;
or DWORD id;
either of them will give another error if i try them and i cant even come close of making since of the web page
Mad | :mad:

just shoot me

Re: loop speed

khan++18-Jul-05 0:13

khan++

18-Jul-05 0:13

First thing to do is Be Calm. Read some poetry.
Next, declaring a variable does not give errors. Make sure you declare it:
DWORD id;
before CreateThread() function call.
And try Rebuild All from the build menu.
If that does not solve the problem, you can post the error that Visual Studio gives.

this is this.

Re: loop speed

locoone18-Jul-05 0:15

locoone

18-Jul-05 0:15

C:\Program Files\Microsoft Visual Studio\MyProjects\wordlist\wordlistDlg.cpp(231) : error C2664: 'CreateThread' : cannot convert parameter 3 from 'unsigned long (void *)' to 'unsigned long (__stdcall *)(void *)'
None of the functions with this name in scope match the target type

DWORD id;
m_bWorking = TRUE;
m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id);
SetThreadPriority(m_hThread,THREAD_PRIORITY_LOWEST);
ResumeThread(m_hThread);
that was with the build all
ps. i am calm lol

Re: loop speed

khan++18-Jul-05 0:23

khan++

18-Jul-05 0:23

Did you declare the Thread function in the class?
It should be like this:
static DWORD __stdcall Thread(LPVOID lpVoid);

In the implementation file:
DWORD __stdcall CMyDlg::Thread(LPVOID lpVoid)
{
...

And "CMyDlg" is the name of your dialog class. Change that with the real name.
Hope that helps.

this is this.

Re: loop speed

locoone18-Jul-05 0:25

locoone

18-Jul-05 0:25

im so lost now i have no clue

Re: loop speed

khan++18-Jul-05 0:36

khan++

18-Jul-05 0:36

Note that CMyDlg is the placeholder of your class-name. e.g, if you made a dialog-based app called Hello, then your dialog class-name will be "CHelloDlg".

When you declare a function, it means go to the header file (*.h), and write the declaration line there:
e.g, in HelloDlg.h:
HANDLE m_hThread;
bool m_bWorking;
static DWORD __stdcall Thread(LPVOID lpVoid);
//------------- declaration ends here.

Now open the associated .cpp file e.g, HelloDlg.cpp and write the complete functions there:
DWORD __stdcall CMyDlg::Thread(LPVOID lpVoid)
{
..... blah blah.

And be sure to read a good book on Visual C++.

this is this.

Re: loop speed

locoone18-Jul-05 1:04

locoone

18-Jul-05 1:04

yea i know about the CMyDlg name i got it to not give a error when compilling but when run is a bad error but its 6 am im going to bed will post tomorrow

Re: loop speed

David Crow18-Jul-05 2:56

David Crow

18-Jul-05 2:56

khan++ wrote:
m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id);

Use AfxBeginThread() with MFC applications.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: loop speed

David Crow18-Jul-05 2:59

David Crow

18-Jul-05 2:59

See here and here for thread information.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: loop speed

locoone18-Jul-05 17:46

locoone

18-Jul-05 17:46

i narrowed it down i think.
if i leave

DWORD id;
m_bWorking = TRUE;
m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id);
SetThreadPriority(m_hThread,THREAD_PRIORITY_LOWEST);
ResumeThread(m_hThread);

like it is it errors if i //ResumeThread(m_hThread);
no error but the program dont run either so im stuck again.
error: debug assertion failed
file: wincore.cpp
line: 890
Dead | X|

Re: loop speed

David Crow19-Jul-05 2:27

David Crow

19-Jul-05 2:27

locoone wrote:
m_hThread = CreateThread(NULL,0,Thread,this,CREATE_SUSPENDED,&id);

See here.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

when the program is closed, why does the exception occur?

liuyue16-Jul-05 23:42

liuyue

16-Jul-05 23:42

i debug my program in VC6.0. when it is closed, the exception "First-chance exception in F863.exe: 0xC0000005: Access Violation." will appear. and the cursor points to m_pInterface->Release().here are some codes:
void _Release() throw()
{
if (m_pInterface != NULL) {
m_pInterface->Release();
}
}
i define the variant:IApplicationPtr m_Application, and i find the exception occured in m_Application->Release().
here are some codes:
int CF863App::ExitInstance()
{
if (m_Application != 0)
m_Application->Release();
return CWinApp::ExitInstance();
}
how can i resolve it?

Re: when the program is closed, why does the exception occur?

Jose Lamas Rios17-Jul-05 16:59

Jose Lamas Rios

17-Jul-05 16:59

Some possible causes:

a) You didn't initialize m_Application to NULL.
b) You are trying to release it more than it's neeeded.
c) Something else Smile | :)

Maybe if you showed where you initialize (or assign) m_Application, and explain what else you do with it...

--
jlr
http://jlamas.blogspot.com/[^]

CPU Serial number

Abd.Eskandari16-Jul-05 21:50

Abd.Eskandari

16-Jul-05 21:50

Any Cpu has a special serial number
How can get it's number in MFC?

Re: CPU Serial number

Alexander ^M.,17-Jul-05 6:02

Alexander ^M.,

17-Jul-05 6:02

Not any CPU does have one, and it has to be enabled in the BIOS.
E.g. the P3 does have a serial number, but the P4 does not have (see http://download.intel.com/design/Xeon/applnots/24161828.pdf[^], p. 17 ("Processor serial number (PSN) is not supported on the Pentium 4 processor or later."))

If you want to access it refer to section 4.1 of this pdf file.

Don't try it, just do it! Wink | ;-)

Re: CPU Serial number

Trollslayer17-Jul-05 6:03

Trollslayer

17-Jul-05 6:03

There is an aricle here[^] that will help.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Convert Bitmap Size

Abd.Eskandari16-Jul-05 21:47

Abd.Eskandari

16-Jul-05 21:47

How can i change width and height of a Bitmap and save it again?

CSocket Progaramming in MFC

mbcvamsidhar16-Jul-05 21:18

mbcvamsidhar

16-Jul-05 21:18

Iam Developing Client/Server Application in MFC Using CSockets.I created Server Socket(Serrived From CSocket) and Created One Thread To Listen to the incoming Requests.In Side that thread iam calling Accept()of CSocket.But my Application is Crashing.can you pls help mw regarding this

VamsiDhar.MBC
SoftwareEngineer

Re: CSocket Progaramming in MFC

M.Mehrdad.M16-Jul-05 21:35

M.Mehrdad.M

16-Jul-05 21:35

There are some questions:
1. when your app. crashes?
2. where your application crashes?
3. Which App crashes?(client or server)
You must trace what happening in debug mode in both sides.

Re: CSocket Progaramming in MFC

mbcvamsidhar18-Jul-05 3:54

mbcvamsidhar

18-Jul-05 3:54

here is my Answers to your question..
My Server Application is crashing when the Application Calls the Thread To start server.
Inside the Thread i called the Accept() methodof server Socket.Then it is Crashing.(It is Crashing becoz it is getting AfxGetInstanceHandle() as NULL).May be the way iam Calling the thread is wrong .

VamsiDhar.MBC
SoftwareEngineer

dynamic struct arrays

Anonymous16-Jul-05 21:12

Anonymous

16-Jul-05 21:12

normally when i wanted a struct array i would do something like this

typedef struct _TEST
{
    char szString[64];
    int number;
} TEST;

TEST *t = (TEST*)malloc(sizeof(TEST) * 10));

in which case i would end up with 10 elements in the struct array
but say later, for example when a user adds an item to a list, i need to add another element, is there is there a way to easily do this ?

Re: dynamic struct arrays

M.Mehrdad.M16-Jul-05 21:37

M.Mehrdad.M

16-Jul-05 21:37

check realloc()

Re: dynamic struct arrays

Anonymous16-Jul-05 22:27

Anonymous

16-Jul-05 22:27

thank you this is exactly what i needed,

Re: dynamic struct arrays

David Crow18-Jul-05 3:04

David Crow

18-Jul-05 3:04

See my comment about realloc() here.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

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