Re: display source code while debugging - C / C++ / MFC Discussion Boards

Re: Inter-Thread Communication

killabyte8-Jul-08 0:14

killabyte

8-Jul-08 0:14

I would use pipes
http://msdn.microsoft.com/en-us/library/aa365781(VS.85).aspx[^]

Re: Inter-Thread Communication

killabyte8-Jul-08 13:16

killabyte

8-Jul-08 13:16

wow 2 votes of 1 .... i guess i fail Poke tongue | ;-P

any reason why this isn't a good messaging scheme?

Re: Inter-Thread Communication

Iain Clarke, Warrior Programmer9-Jul-08 0:09

Iain Clarke, Warrior Programmer

9-Jul-08 0:09

I've only just seen your post, so I'm not one of the 2 1's, but pipes are a heavy duty solution that's too cumbersome most of the time.

I've used them myself between processes - the idea was that one of my processes might not even be on the same PC, so they give good flexibility.

But between two threads in the same the same process, I think they're over the top. Especially for worker->ui thread communications. PostMessage works a treat, and fits nicely into the MFC message loop handling. For pipes, you'd need to alter the message pump to wait for events (you have overlapped I/O I hope!) and messages.

For ui->worker thread communications, pipes are more appropriate - especially if it's opened in message mode.

Iain.

Plz sir... ^CPallini ^CPallini abuz drugz, plz plz help urgent.

Re: Inter-Thread Communication

killabyte9-Jul-08 2:45

killabyte

9-Jul-08 2:45

Hmm u raise a good point, PostMessage() or PostThreadMessage() probably more applicable in this case.
thinking back to when i have used pipes i have been shooting off messages then a chunk of data.

i will admit i like pulling out the nail gun even if i only have to put in one nail $Shucks | :-\$

Re: Inter-Thread Communication

Cedric Moonen8-Jul-08 0:40

Cedric Moonen

8-Jul-08 0:40

As a remark, it's also usefull to know that you can access the variables directly (providing you have a way to access them) from within the different threads.

Cédric Moonen
Software developer

Charting control [v1.4]
OpenGL game tutorial in C++ [New]

display source code while debugging

George_George7-Jul-08 23:56

George_George

7-Jul-08 23:56

Hello everyone,

I have correctly set the source path in Windbg. After setting a breakpoint, how to display the related source files so that I can use them as the similar approach in Visual Studio 2008, e.g. using F10 to step next, using F11 to step in something like this.

I have tried ls command in WinDbg, but failed, error message is "No current source file".

thanks in advance,
George

Re: display source code while debugging

Stephen Hewitt8-Jul-08 15:01

Stephen Hewitt

8-Jul-08 15:01

Has the program you're debugging has symbol files (.PDB files)?

Steve

Re: display source code while debugging

George_George8-Jul-08 15:44

George_George

8-Jul-08 15:44

Sure, Stephen! I have setup the symbol path. My purpose is to find some "cool and lazy" way which could type a command in command window, and related source file is displayed, currently I have to use File --> Open Source File to open the related source file.

I set the source path by File --> Source Code Path, then input the path of the directory which contains the source codes. Is this correct way to setup source path? Do I need to do anything else in order to setup source path, e.g. reload something? Smile | :)

regards,
George

Writing to Registry

V K 27-Jul-08 23:01

V K 2

7-Jul-08 23:01

Hi,
My application writes into a particular location in Registry

Eg. RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\\Microsoft\\Windows\\CurrentVersion\\Run",
0, KEY_ALL_ACCESS, &h_Key); //Open a particular registry key

//Write to that registry key.

I need to restrict this activity to only Administrator..

Can I have a code snippet which allows this only for Administrator.

Thanks.
Venkat

Re: Writing to Registry

Rajesh R Subramanian7-Jul-08 23:03

Rajesh R Subramanian

7-Jul-08 23:03

IsUserAnAdmin()[^] would help you.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

Re: Writing to Registry

V K 27-Jul-08 23:25

V K 2

7-Jul-08 23:25

Thanks.. But I am getting a compilation error even after including "shlobj.h"

Re: Writing to Registry

Rajesh R Subramanian7-Jul-08 23:35

Rajesh R Subramanian

7-Jul-08 23:35

venkat.kupunaram wrote:
I am getting a compilation error

My telescope is missing. Can you tell me what exactly the error is?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

Re: Writing to Registry

V K 27-Jul-08 23:37

V K 2

7-Jul-08 23:37

I am using VC++6.0

error C2065: 'IsUserAnAdmin' : undeclared identifier

Re: Writing to Registry

Rajesh R Subramanian7-Jul-08 23:46

Rajesh R Subramanian

7-Jul-08 23:46

The function information of IsUserAnAdmin() says - "Shell32.DLL version 5.0 or higher will be required" to make use of this call, which means earlier versions won't have this function exported at all.

See here[^]. You'll need the latest SDK (or the SDK which is latest enough and has version 5.0 or higher of Shell32.DLL) to use this call.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

Re: Writing to Registry

V K 28-Jul-08 0:28

V K 2

8-Jul-08 0:28

I am using File version 6.0.3790.4184.. But still I am getting a compilation error.

Re: Writing to Registry

David Crow8-Jul-08 2:55

David Crow

8-Jul-08 2:55

Do you have the Feb 2003 version of the Platform SDK?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Nope.

CPallini7-Jul-08 23:40

CPallini

7-Jul-08 23:40

Rajesh R Subramanian wrote:
My telescope is missing. Can you tell me the what exactly the error is?

Nope. Go back home and get the telescope. Poke tongue | ;-P

BTW: Eventually MFC appeared in your profile 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: Nope.

Rajesh R Subramanian7-Jul-08 23:48

Rajesh R Subramanian

7-Jul-08 23:48

CPallini wrote:
Nope. Go back home and get the telescope. [Poke tongue]

Sorry, but I see the question was not "very urgent", so I could ask the OP to take some time to let me know more of the error.

CPallini wrote:
BTW: Eventually MFC appeared in your profile [Big Grin]

$Shucks | :-\$

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

Re: Nope.

CPallini7-Jul-08 23:56

CPallini

7-Jul-08 23:56

Rajesh R Subramanian wrote:
Sorry, but I see the question was not "very urgent", so I could ask the OP to take some time to let me know more of the error.

You're wrong: "very urgent" it's the default.
"Plz plz very urgent" is the courtesy form.
Big Grin | :-D

I'm thinking of authoring a book. I was just wondering if you'd join me

Rajesh R Subramanian8-Jul-08 0:01

Rajesh R Subramanian

8-Jul-08 0:01

"Attack of the Urgent Monkeys" Laugh | :laugh:

BTW, we're dangerously close to hijack this thread. Suspicious | :suss:

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.

Microsoft MVP - Visual C++[^]

Sure.

CPallini8-Jul-08 0:13

CPallini

8-Jul-08 0:13

Re: Writing to Registry

_AnsHUMAN_ 7-Jul-08 23:05

_AnsHUMAN_

7-Jul-08 23:05

Use BOOL IsUserAnAdmin(VOID);
Perform writing to the registry only if this function returns true.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Writing to Registry

V K 27-Jul-08 23:49

V K 2

7-Jul-08 23:49

This api is giving a compilation error in VC++6.0

Re: Writing to Registry

_AnsHUMAN_ 8-Jul-08 0:06

_AnsHUMAN_

8-Jul-08 0:06

Here is the code for IsUserAdmin

<code>
BOOL IsUserAdmin(VOID)
/*++ 
Routine Description: This routine returns TRUE if the caller's process is a member of the Administrators local group. Caller is NOT expected to be impersonating anyone and is expected to be able to open its own process and process token. 
Arguments: None. 
Return Value: 
   TRUE - Caller has Administrators local group. 
   FALSE - Caller does not have Administrators local group. --
*/ 
{
BOOL b;
SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
PSID AdministratorsGroup; 
b = AllocateAndInitializeSid(
    &NtAuthority,
    2,
    SECURITY_BUILTIN_DOMAIN_RID,
    DOMAIN_ALIAS_RID_ADMINS,
    0, 0, 0, 0, 0, 0,
    &AdministratorsGroup); 
if(b) 
{
    if (!CheckTokenMembership( NULL, AdministratorsGroup, &b)) 
    {
         b = FALSE;
    } 
    FreeSid(AdministratorsGroup); 
}
</code>

<div class="ForumSig">Somethings seem HARD to do, until we know how to do them.
;-)_AnShUmAn_
</div>

Re: Writing to Registry

V K 28-Jul-08 0:14

V K 2

8-Jul-08 0:14

Thanks.. But I written a user define function and written the above code.. I am getting a compilation error at CheckTokenMembership...

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