Re: Disabling interrupt to achieve mutual exclusion? - C / C++ / MFC Discussion Boards

Re: how can I debug this?

Jay24-Nov-02 14:24

Jay2

4-Nov-02 14:24

Yeh u want RemoveAll if it is a CList???

CEdit : Detect the VK_ENTER , VK_TAB+, VK_LF from a string

youssef4-Nov-02 6:19

youssef

4-Nov-02 6:19

Hi,

I receive from a Barcode Reader a string with a end of message character LF, TAB+, ENTER, RETURN, CR/LF in an editbox.

For example : *B00001*+<cr> or *B00001*+<enter>, ...

When I receive the string and the End of Message is RETURN, CR, ENTER, the program is closed. Ok I use Pretranslate Message for inhibit.

But when I would like to use TAB+ or LF nothing. I listen a BEEP.

My question is :

I would like when the Editbox detect the End of Message from the Barcode Reader, I execute a command.

Best Regards,

youssef

Determining if SQL replication is enabled

Andreas Saurwein4-Nov-02 5:39

Andreas Saurwein

4-Nov-02 5:39

How to do this by using SQL-DMO? Subscriber and publisher status must be known.

I keep submitting “VB” as a Priority-1 bug, but apparently no one here knows how to fix it. Nick Hodapp, Semicolon

Communicate with function inside OS!

tongc4-Nov-02 5:01

tongc

4-Nov-02 5:01

Hi!

In a system that has full memory protection, what are the way that allow user application to communicate with function inside the OS???

Thanks

Re: Communicate with function inside OS!

ian mariano4-Nov-02 6:50

ian mariano

4-Nov-02 6:50

You do it with system calls. Basically a system call is a "software interrupt" that get fired off from a user process, which is intercepted by the kernel of the OS to do work on behalf of the user.

What OS? Google[^]

"The greatest danger to humanity is humanity without an open mind."
- Ian Mariano - http://www.ian-space.com/

GDI+ problemos

Tim Stubbs4-Nov-02 4:42

Tim Stubbs

4-Nov-02 4:42

Consider the following (i've cut things for brevity)...

using namespace Gdiplus;
CImageList img;
img.Create(IDB_USERBUTTONS,32, 52, RGB(192,192,192));

CLSID bmpClsid;

if (GetEncoderClsid(L"image/bmp", &bmpClsid) == -1)
{
ASSERT(FALSE);
}

IMAGEINFO *i;
for (long t = 0; t < numbuttons; t++)
{
HICON bibi = ImageList_img.ExtractIcon(t);
HICON bibi2 = CopyIcon(bibi);
Bitmap image(btn.GetIcon());
s = image.Save(name.AllocSysString(), &bmpClsid, NULL);
}

So, in effect, I'm trying to use the Bitmap class' constructor to load an image from a HICON which itself derives from an ImageList (ExtractIcon). However, although this should work (and i can use the HICON on a button for example) the Bitmap constructor simply blows up, trashes the stack and leaves me with nothing useful to work with. Passing a HICON from an icon resource... works. Why?
It seemed like a fine idea to parse an imagelist into a bunch of disk-based image files...
WTF | :WTF:

Tim Stubbs

Disabling interrupt to achieve mutual exclusion?

tongc4-Nov-02 2:22

tongc

4-Nov-02 2:22

Hi!

Could anyone tell me why disabling interupts to achieve mutual exclusion is not acceptable on a multiprocessor sytem???

Thanks

Re: Disabling interrupt to achieve mutual exclusion?

Phil Speller4-Nov-02 2:43

Phil Speller

4-Nov-02 2:43

Well, the first thing that springs to mind is that you can't arbitrate access to any external shared resources with this method e.g. shared RAM. However, the use of something like a Semaphore in the context of a multi-processor kernel would allow this. In general, it is always best to think twice about disabling interrupts to implement mutual exlusion since any time spent in this state will increase interrupt latency - which may not be desirable.

Phil

Dialog Box question

Pett4-Nov-02 2:15

Pett

4-Nov-02 2:15

Hi
I want to bring up a dialog box when a button is clicked.I'm having problems getting the dialog box to appear when I click on the file.

My code is:

void CMainFrame::OnSFile() <br />
<br />
{       <br />
        <br />
        m_chatterChooser.DoModal(); <br />
}

And I've declared in the header:

CDialog m_chatterChooser;

Is this correct? Unsure | :~

Thank you.