Re: Programming on multiprocessor computer - C / C++ / MFC Discussion Boards

Re: Programming on multiprocessor computer

Tomasz Sowinski13-Mar-02 1:03

13-Mar-02 1:03

Dang Xuan Ky wrote:
I want to use multithread teachnique for this and assign a specific thread to a specific CPU.

SetThreadAffinityMask does that.

Tomasz Sowinski -- http://www.shooltz.com

Re: Programming on multiprocessor computer

Jon Hulatt13-Mar-02 1:41

Jon Hulatt

13-Mar-02 1:41

Be careful though, the OS is pretty good at dividing your threads up between CPU's, and if you start trying to force a thread to a cpu, you may well in fact decrease your application's performance.

Sorry to dissapoint you all with my lack of a witty or poignant signature.

Re: Programming on multiprocessor computer

Tim Smith13-Mar-02 2:01

Tim Smith

13-Mar-02 2:01

Jon is correct. You really shouldn't be assigning threads to a CPU. Unless you really have a very strong grasp of the ramifications, you are likely to degrade performance.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Re: Programming on multiprocessor computer

Tomasz Sowinski13-Mar-02 2:21

Tomasz Sowinski

13-Mar-02 2:21

Maybe you guys should answer to the original poster? He'll get email notification, etc. Big Grin | :-D

Tomasz Sowinski -- http://www.shooltz.com

Re: Programming on multiprocessor computer

Jon Hulatt13-Mar-02 2:45

Jon Hulatt

13-Mar-02 2:45

We thought you'd like the email!!! personally, i *love* getting mail that i don't care about Smile | :)

Sorry to dissapoint you all with my lack of a witty or poignant signature.

Re: Programming on multiprocessor computer

Tomasz Sowinski13-Mar-02 2:42

Tomasz Sowinski

13-Mar-02 2:42

Jon Hulatt wrote:
We thought you'd like the email!!!

I do Smile | :)

I'm just worried about our multi-threaded programmer who can be totally unaware about this discussion Smile | :)

Tomasz Sowinski -- http://www.shooltz.com

Re: Programming on multiprocessor computer

Dang Xuan Ky14-Mar-02 5:35

Dang Xuan Ky

14-Mar-02 5:35

I think that I can use SetProcessAffinityMask. For a process I assign it to one CPU and the other to another CPU. The two process can communicate through share memory. That's all what I think but now I try to find a sample to demonstrate the using of SetProcessAffinityMask. I read it a lot in MSDN but nothing is found. If you have the code, please show me. Thanks everybody.

Re: Programming on multiprocessor computer

Tomasz Sowinski14-Mar-02 5:50

Tomasz Sowinski

14-Mar-02 5:50

Don't try to outsmart OS scheduler - your performance will be significantly down if you tie one process to first CPU and the other to second CPU. Just let Windows do its work and stop worrying about that.

Tomasz Sowinski -- http://www.shooltz.com

How to get network card serial number?

Ales Krajnc13-Mar-02 0:15

Ales Krajnc

13-Mar-02 0:15

I have tried to find an answer the the question abovee, but the search failed. Cry | :((

Is there a simple way to get a serial number of the newtork card? Maybe an API call?

Thanks!

Ales

Re: How to get network card serial number?

Jon Hulatt13-Mar-02 1:45

Jon Hulatt

13-Mar-02 1:45

http://www.codeproject.com/useritems/getmac.asp

Should this go in Mike Dunn's C++ FAQ?

Sorry to dissapoint you all with my lack of a witty or poignant signature.

SendARP

13-Mar-02 4:49

// // Link with ws2_32.lib and iphlpapi.lib
//

#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#include <iphlpapi.h>

int __cdecl main()
{
HRESULT hr;
IPAddr ipAddr;
ULONG pulMac[2];
ULONG ulLen;

ipAddr = inet_addr ("216.145.25.31");
memset (pulMac, 0xff, sizeof (pulMac));
ulLen = 6;

hr = SendARP (ipAddr, 0, pulMac, &ulLen);
printf ("Return %08x, length %8d\n", hr, ulLen);

size_t i, j;
char * szMac = new char[ulLen*3];
PBYTE pbHexMac = (PBYTE) pulMac;

//
// Convert the binary MAC address into human-readable
//
for (i = 0, j = 0; i < ulLen - 1; ++i) {
j += sprintf (szMac + j, "%02X:", pbHexMac[i]);
}

sprintf (szMac + j, "%02X", pbHexMac[i]);
printf ("MAC address %s\n", szMac);

delete [] szMac;

return 0;
}

Enumerate handles

Don Miguel13-Mar-02 0:05

Don Miguel

13-Mar-02 0:05

Hello,

How can I enumerate all handles used by a process?
(I mean files, sockets, mutexes, etc. and also GDI handles)
Which function API do this???

Thanks.

Re: Enumerate handles

Stephen Kellett13-Mar-02 8:02

Stephen Kellett

13-Mar-02 8:02

There is no publicly documented Win32 API to do this.

However there are some functions which will do this in the api for ntdll.dll. The book Windows NT/2000 Native API Reference documents these functions and gives examples of how to use them.

Search for NtQuerySystemInformation() on the web.

You want to query for class SystemHandleInformation, this has a value of 16.

Then to determine the handle type, call NtQueryObject()

Note that these APIs or the data input/returned may change between NT/2000/XP/etc.

There are some classes on CodeGuru that do examples of this work, but they are broken, as the data structures used to query the APIs are incomplete and incorrect - compare with the book and you'll see what I mean.

Cheers

Stephen Kellett
--
C++/Java/Win NT/Unix variants
Memory leaks/corruptions/performance/system problems. UK based.
Problems with RSI/WRULD? Contact me for advice.

Re: Enumerate handles

Carlos Antollini13-Mar-02 8:26

Carlos Antollini

13-Mar-02 8:26

With psapi functions like EnumProcessModules

Best Regards....

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: Enumerate handles

Don Miguel13-Mar-02 21:00

Don Miguel

13-Mar-02 21:00

Hi Carlos,

I look closely to EnumProcessModules,
also try to found some samples on the web,
but it seems this function can help only to
enumerate processes, not handles used by them.

Regards.

Removing application icon from alt+tab list

KGS12-Mar-02 22:53

KGS

12-Mar-02 22:53

Hello Xperts,

I need to remove application icon from alt+tab list, please post the solution, if you know.

Thanks in advance..

KGS

Re: Removing application icon from alt+tab list

Tomasz Sowinski12-Mar-02 22:54

Tomasz Sowinski

12-Mar-02 22:54

Check KB article Q205158

Tomasz Sowinski -- http://www.shooltz.com

Re: Removing application icon from alt+tab list

KGS12-Mar-02 23:47

KGS

12-Mar-02 23:47

Great Tomasz Sowinski..
Thanks for quick reply, I have to try..

KGS

Help!

Jacky Wu12-Mar-02 22:27

Jacky Wu

12-Mar-02 22:27

How to realize moving picture using hand-like cursor. just like Imaging For Windows at windows accessory.

Use Stingray Objective Grid 97

Simon Roth12-Mar-02 21:12

Simon Roth

12-Mar-02 21:12

Hi,

can someone give me some information about using Stingray Objective Grid 97 Control? I had read the documentation but it´s very bad! Or has someone a tutorial about it??

thanks
Simon

Re: Use Stingray Objective Grid 97

Tomasz Sowinski12-Mar-02 23:04

Tomasz Sowinski

12-Mar-02 23:04

It's not *that* bad. And there should be a plenty of samples with full source code.

AFAIK, there's no info on ObjectiveGrid on CP. You may consider switching to this free grid by Chris Maunder:
http://www.codeproject.com/miscctrl/gridctrl.asp

Tomasz Sowinski -- http://www.shooltz.com

Windows CE and System font

12-Mar-02 20:56

Hi out there,

I'm working an instrument based on the Windows CE operating system. The applications is now to be translated into Japanese.
I have found a true type font "MS Gothic.ttf" that supports Japanese charactes. That works fine except for titles in dialogs that use the sysytem font.
I don't want to link the font into the OS image but instead load a system font dynamically.

I have tried to modify the registry:
[HKEY_LOCAL_MACHINE\SYSTEM\GDI\SYSFNT\Nm] from Tahoma to MS Gothic
[HKEY_LOCAL_MACHINE\SYSTEM\GWE\Menu\BarFnt\Nm] from Tahoma to MS Gothic
[HKEY_LOCAL_MACHINE\SYSTEM\GWE\Menu\PopFnt\Nm] from Tahoma to MS Gothic
[HKEY_LOCAL_MACHINE\SYSTEM\GWE\OOMFnt\Nm] from Tahoma to MS Gothic

But it doesn't work.

Any ideas??

Confused | :confused:

Jørgen Belfalas

How to get highlighted text by double click?

Pony12-Mar-02 20:07

Pony

12-Mar-02 20:07

Hello,
I have a problem with text selection. I want to get the highlighted text that users double click on it (not only in my own application). Do I have to use COleDataObject to implement this? Is this about clipboard?

I'm a beginner. Guide me, please. Blush | :O

Re: How to get highlighted text by double click?

Tomasz Sowinski12-Mar-02 23:12

Tomasz Sowinski

12-Mar-02 23:12

Yes, it's about clipboard. This code places the contents of strClipboardText variable in clipboad. You'll probably use CEdit::GetSel and CEdit::GetSel and CEdit::GetWindowText to get this string.

CString strClipboardText = ...;

if (!OpenClipboard() || !EmptyClipboard())
{
	AfxMessageBox("Error: can't open the clipboard.");
	return;
}
HGLOBAL hglbText = GlobalAlloc(GMEM_MOVEABLE, 1 + strClipboardText.GetLength()); 
char *pData = (char *)GlobalLock(hglbText); 
lstrcpy(pData, strClipboardText);
GlobalUnlock(hglbText); 
SetClipboardData(CF_TEXT, hglbText);
CloseClipboard();

Assuming that you're using CEdit control, there will be a problem with double-clicking - this action highlights the *word* you're clicking on. Previous selection is lost. You may try to override WM_LBUTTONDBLCLK to change this behavior.

Tomasz Sowinski -- http://www.shooltz.com

Re: How to get highlighted text by double click?

Pony13-Mar-02 6:22

Pony

13-Mar-02 6:22

Thank you very much.

But there's a problem. I didn't get highlighted text from edit box but i want to get highlighted text from anywhere on screen (ex. in browser, spreadsheet, notepad, etc.). How can I get it? Guide me, please.
Blush | :O

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