C / C++ / MFC

toxcct28-Jul-06 2:31

toxcct

28-Jul-06 2:31

ask this in the Mobile development forum[^].

they certainly know more about this over there...

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

George_George1-Aug-06 22:42

George_George

1-Aug-06 22:42

Thank you toxcct!

I will do that!

regards,
George

Mike Dimmick28-Jul-06 3:57

Mike Dimmick

28-Jul-06 3:57

Everyone predicted that the version of Windows Mobile after 2003 SE would be called 2005, but Microsoft decided when announcing it that it would be called 5.0. You will sometimes find resources referring to the predicted name that either haven't been updated, or were written by people who didn't keep track of Microsoft's marketing.

Stability. What an interesting concept. -- Chris Maunder

George_George1-Aug-06 22:39

George_George

1-Aug-06 22:39

Thank you Mike!

Do you know whether Micorosoft provides some documents to clarify this issue?

regards,
George

tracing DLL in. NET

Abhi Lahare28-Jul-06 2:18

Abhi Lahare

28-Jul-06 2:18

hi everyone,
Sorry if my question sounds too foolish.
I am totally new to .NET, I have .NET code which call a DLL function. I want to debug the dll function. but the devenv does not step into dll function.Is there any setting in .NET env to do this? or any other way of doing this.

Regards
Abhi Lahare

`

toxcct28-Jul-06 2:26

toxcct

28-Jul-06 2:26

what are you calling .NET ?

the development environment (Visual Studio .NET 2003) or the .NET framework ?
i mean, is you dll a managed code library, or native ?

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Abhi Lahare28-Jul-06 2:32

Abhi Lahare

28-Jul-06 2:32

hi Toxcct,
The DLL is a C++ DLL, and .NET is a C# application.
since i am not aware of managed code library, or native i cannot answer that.

Thanks in advance
Abhi Lahare

toxcct28-Jul-06 3:01

toxcct

28-Jul-06 3:01

wow, i think you have some lacks i have to fill here.

C++ is only a language. you can program for different target system with C++, like Windows, Unix, Mac... the difference (if you code is well written and portable) will not be in your sources, but in the binary the compiler/linker generates. this binary is commonly called "native", as it directly contain the microprocessor instructions.

by opposition to native code, .NET (i mean, the .NET framework) is a framework like the Java Virtual Machine which - is supposed to - allow the code compiled to work on every plateform. this implies the compiler generate an intermediate language (MSIL for .NET, ByteCode for JavaVM). this intermediate language is called Managed code because its execution is done only within the .NET framework.

some languages (like C#) generate only managed code. but C++ can do both.
if you program with Win32/MFC/ATL/WTL libraries, then the code will generate some native instructions. but the Microsoft C++ compiler can also generate "Managed C++" also called (C++/CLI) for the .NET framework.

then, to come back to your problem, when you say the DLL is a C++ DLL, you don't explain much.
also, saying that .NET is a C# application does no only explain nothing, but is wrong in the facts.

now, knowing these things, can you please explain what problem you encounter, and what you want to do ?

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Abhi Lahare28-Jul-06 2:37

Abhi Lahare

28-Jul-06 2:37

hi Toxctt,
Or do i have to set the debug path and trace through the dll function? but i don't want to do that.

Thanks in advance,
Abhi Lahare

Cedric Moonen28-Jul-06 2:53

28-Jul-06 2:53

How are you trying to debug your dll ?
Do you know that, in VC++, you can debug a dll very simply: you can choose an executable for debug session (you have to look in the project properties of your dll project). Then, you simply choose which executble will be started to debug your dll. When a function of your dll is called, you can step inside it (like a normal executable).

Cédric Moonen
Software developer

Charting control

Cedric Moonen28-Jul-06 2:57

28-Jul-06 2:57

Or an easier way: open your dll project and press F5 (like if you want to start debugging). A dialog will appear in which you can select the executable to will be started (and which of course need to use your dll). Select the executable of your other project.

Cédric Moonen
Software developer

Charting control

Closing an application while it is still busy

Eytukan28-Jul-06 7:43

Eytukan

28-Jul-06 7:43

It's a COM dll ? you can make a reference in your C# project and use it directly in your code. It automatically makes use of the interop service.

<marquee scrollamount="1" scrolldelay="1" direction="up" height="10" step="1">--[ Jig | [Dance]

]--

[My Current Status]
I dont know why the hell the script for voting 5 is disabled only for me?? Mad | :mad:

cv_k3n28-Jul-06 1:51

cv_k3n

28-Jul-06 1:51

When a program executes some functions(eg in a for loop), all the buttons in the dialog won't work. Is is possible to close that program or stop it it while it is still in a 'for' loop? Something like Ctrl C in Unix? Thanks.

Naveen28-Jul-06 1:58

Naveen

28-Jul-06 1:58

if u have another thread, in that process u can call ExitProcess() from that thread and exit the application.

nave

Cedric Moonen28-Jul-06 2:00

28-Jul-06 2:00

cv_k3n wrote:
Is is possible to close that program or stop it it while it is still in a 'for' loop?

It depends of your definition of 'closing' Smile | :)

. There is always the option of killing it through the task manager but I don't know if this is what you are looking for.
Anyway, it is in general a very bad idea to have long loops in the same thread as the GUI. A better solution would be to start a thread in background that will take care of this loop. In that case, you won't freeze your GUI.

Cédric Moonen
Software developer

Charting control

cv_k3n28-Jul-06 4:21

cv_k3n

28-Jul-06 4:21

Thanks.. I looked up on how to use a thread in my program and i found this article:

To the class (in this example, a CView-derived class), add the following declarations:

<br />
static UINT run(LPVOID p);<br />
void run();<br />
volatile BOOL running;<br />

To start a thread, your handler does

<br />
void CMyView::doInvert()<br />
    {<br />
     running = TRUE;<br />
     AfxBeginThread(run, this);<br />
    }<br />
 <br />
UINT CMyView::run(LPVOID p)<br />
    {<br />
     CMyView * me = (CMyView *)p;<br />
     me->run();<br />
     return 0;<br />
    }<br />
 <br />
void CMyView::run()<br />
   {<br />
     for(int x=y = 0; running && y < image.height; y++)<br />
          for(int x = 0; running && x < image.width; x++)<br />
              changePixel(x, y);<br />
    running = FALSE;<br />
   }<br />

The command to stop the thread is very simple:

<br />
void CMyView::OnStop()<br />
   {<br />
    running = FALSE;<br />
   }

I've tried this out but whenever i run my function, a 'Debug Assertion Failed' dialog pops up. I don't understand why. BTW, i'm working on a dialog based application and i realised the example above is for an SDI application. But it should still work right?

Eytukan28-Jul-06 7:47

Eytukan

28-Jul-06 7:47

What's you dialog class' name?

<marquee scrollamount="1" scrolldelay="1" direction="up" height="10" step="1">--[ Jig | [Dance]

]--

[My Current Status]
I dont know why the hell the script for voting 5 is disabled only for me?? Mad | :mad:

cv_k3n28-Jul-06 17:03

cv_k3n

28-Jul-06 17:03

My dialog class' name is CSimulationDlg. So i replaced all of the CMyView with that. IS that right?

dynamically allocted array question

David Crow28-Jul-06 5:00

David Crow

28-Jul-06 5:00

cv_k3n wrote:
Is is possible to close that program or stop it it while it is still in a 'for' loop?

Are you sure you want to do this? What if the application is in the middle of something important (e.g., writing to the disk)?

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

kitty528-Jul-06 1:22

kitty5

28-Jul-06 1:22

if I do:

<br />
#DEFINE BUFF_SIZE 0x400; //# of bytes to read<br />
ULONG *buff = null, numBytesRead = 0;<br />
buff = new ULONG[11250000]; //total of 11,250,000 32-bit words<br />
Handle hdl = INVALID_HANDLE_VALUE;<br />
...<br />
while(...){<br />
   ReadFile(hndlPciAlt, buff, BUFF_SIZE, numBytesRead, NULL); //DMA data xfer<br />
   ...<br />
}<br />
<br />
Where:<br />
BOOl ReadFile(<br />
  HANDLE hFile,<br />
  LPVOID lpBuffer,<br />
  DWORD nNumberOfBytesToRead,<br />
  LPDWORD lpNumberOfBytesRead,<br />
  LPOVERLAPPED lpOverlapped<br />
);<br />
is a windows function.<br />

Questions:
1) So, I pass in the *buff. ReadFile() will dump the data there.
If I do another ReadFile() will it append to the end of *buff?
OR, will it overlap the data already in the *buff, if so,
how do I make subsequent writes into *buff append to the end of it?
2) Does ReadFile() automatically stick each 32-bit word out of the 1024 words it reads into each of the individual array slot of buff? So, that there will be a total of 256 array elements after the 1st call to ReadFile().
3) If "DWORD nNumberOfBytesToRead" is the min number of bytes to read, will
ReadFile() read more bytes if they are available? If so, how can you
limit ReadFile to only read the specified number of bytes?

Kitty5

Cedric Moonen28-Jul-06 1:31

28-Jul-06 1:31

kitty5 wrote:
1) So, I pass in the *buff. ReadFile() will dump the data there.
If I do another ReadFile() will it append to the end of *buff?
OR, will it overlap the data already in the *buff, if so,
how do I make subsequent writes into *buff append to the end of it?

No, it copy the data at the address you pass to the function, which is the begining of your array. If you want to append it, you'll have to increment the address (something like buff+Offset). But warning !! As your buffer is a ULONG, it means that a single increment will point to the next ULONG (so 4 bytes further). It is not a good idea in this case to use a pointer to ULONG, use a pointer to UCHAR instead so you don't have to cast the pointer to a char area in order to be able to increment only one byte.
Remember that ReadFile read data un bytes, so it can read only 3 bytes for example (and there you got the problem because it is not a multiple of 4)

kitty5 wrote:
2) Does ReadFile() automatically stick each 32-bit word out of the 1024 words it reads into each of the individual array slot of buff? So, that there will be a total of 256 array elements after the 1st call to ReadFile().

ReadFile is supposed to read bytes, so it has nothing to do with 32-bit words.

kitty5 wrote:
3) If "DWORD nNumberOfBytesToRead" is the min number of bytes to read, will
ReadFile() read more bytes if they are available? If so, how can you
limit ReadFile to only read the specified number of bytes?

No, it is the number of bytes to read. The function won't read more bytes (yup, I checked MSDN and that's strange they say minimum instead of maximum Unsure | :~

)

Cédric Moonen
Software developer

Charting control

Steen Krogsgaard28-Jul-06 1:39

Steen Krogsgaard

28-Jul-06 1:39

damn. You beat me to it Smile | :)

Cheers
Steen.

"Are you gonna check your makeup when you're done whining?" John Simmons, 05/31/2006

kitty528-Jul-06 2:08

kitty5

28-Jul-06 2:08

Cedric Moonen wrote:
If you want to append it, you'll have to increment the address (something like buff+Offset). But warning !! As your buffer is a ULONG, it means that a single increment will point to the next ULONG (so 4 bytes further). It is not a good idea in this case to use a pointer to ULONG, use a pointer to UCHAR instead so you don't have to cast the pointer to a char area in order to be able to increment only one byte.

Ok so I do:

<br />
#define BUFF_SIZE = 0X400;<br />
ULONG numBytesRead = 0, offset = 0;<br />
UCHAR *buff = null;<br />
buff = new UCHAR[45000000];<br />
while(...)<br />
{<br />
   ReadFile(hndlPciAlt, buff, BUFF_SIZE, numBytesRead, NULL); //DMA data xfer<br />
}<br />

how would I pass the offsetted buff address in the while loop?
(i.e. buff + numBytesRead)
Since, every time I got into the loop it will be buff then buff + numBytesRead then buff + numBytesRead + numBytesRead, ... etc.
can I:

<br />
#define BUFF_SIZE = 0X400;<br />
ULONG numBytesRead = 0, offset = 0;<br />
UCHAR *buff = null;<br />
buff = new UCHAR[45000000];<br />
while(...)<br />
{<br />
   ReadFile(hndlPciAlt, (buff + offset), BUFF_SIZE, numBytesRead, NULL); //DMA data xfer<br />
   offset += numBytesRead;<br />
}<br />

Is (buff + offset) the proper syntax to increment the address of buff?

Thanks. Big Grin | :-D

Kitty5

Cedric Moonen28-Jul-06 2:15

28-Jul-06 2:15

kitty5 wrote:
Is (buff + offset) the proper syntax to increment the address of buff?

Yes, that's how you need to do it. And your code snippet is correct also. You can stop the loop when offset == the number of bytes you need to read.

Cédric Moonen
Software developer

Charting control