C / C++ / MFC

23-Jun-08 20:33

What is the priority of MFC application's GUI thread?

Regards,
Suman

--
"Programming is an art that fights back!"

SandipG 23-Jun-08 20:51

SandipG

23-Jun-08 20:51

Default value is THREAD_PRIORITY_NORMAL
you can use SetThreadPriority() to set desired priority.

Regards,
Sandip.

Naveen23-Jun-08 20:52

Naveen

23-Jun-08 20:52

Why dont you try your self using GetThreadPriority() function?

nave

[OpenedFileFinder]

rp_suman23-Jun-08 20:55

23-Jun-08 20:55

Thanks for your help!!

I thought these functions of setting and getting thread priority are for only user defined threads, but it seems we can use them for any thread.

But setting priority to GUI thread will work?

Thanks,
Suman

--
"Programming is an art that fights back!"

Rajesh R Subramanian23-Jun-08 21:34

23-Jun-08 21:34

rp_suman wrote:
I thought these functions of setting and getting thread priority are for only user defined threads,

There is nothing called as an user defined thread. There are only two types of threads - UI and worker.

rp_suman wrote:
But setting priority to GUI thread will work?

Why not try it?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

SandipG 24-Jun-08 0:49

SandipG

24-Jun-08 0:49

Now i got it why you are called gray man Smile | :)

Regards,
Sandip.

rp_suman24-Jun-08 15:02

24-Jun-08 15:02

Hi,

Thanks for your help..

I meant the thread created by user and not applications default one.

Getting or setting priority to application thread is possible, but as Cedric Moonen said, we shold take care when setting priorities.

Thanks & Regards,
Suman

--
"Programming is an art that fights back!"

rp_suman23-Jun-08 20:52

23-Jun-08 20:52

I got it using GetThreadPriority() function inside InitInstance(), it is normal priority(THREAD_PRIORITY_NORMAL = 0).

--
"Programming is an art that fights back!"

Cedric Moonen23-Jun-08 21:24

Cedric Moonen

23-Jun-08 21:24

It's not a answer to your question, but are you really sure that you want to change the GUI thread priority ? If you are still talking about the same problem as yesterday, then I guess that changing the thread priority to avoid a race condition is not the way to go. Besides, if you handle that not correctly you may end up freezing your whole system.

If you use critical section with care, that should solve a lot of your problem (even if you think this will be slower).

Cédric Moonen
Software developer

Charting control [v1.4]

Rajesh R Subramanian24-Jun-08 0:32

24-Jun-08 0:32

Hi Cedric,

Is that just me or nobody's CPMRU will be able to cope with this[^] post? Please tell me that I'm not alone. Unsure | :~

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Cedric Moonen24-Jun-08 1:34

Cedric Moonen

24-Jun-08 1:34

No, you're not alone Big Grin | :-D

Cédric Moonen
Software developer

Charting control [v1.4]

rp_suman24-Jun-08 14:43

24-Jun-08 14:43

Hi,

I asked this to just know and not for any problem.

That problem of race condition resolved already by updating write pointer count only after current write is finish which Pallini suggested.

BTW: My current project consists of many threads, timer, callback from me and other developers, thats why I wanted to know priority level of each.

Thanks for all your help!!

Regards,
Suman

--
"Programming is an art that fights back!"

Rajesh R Subramanian23-Jun-08 21:42

23-Jun-08 21:42

Oh my God! Is it related to this[^]? If yes, you're doing a terrible thing. Please follow the guidance given to you by Cedric.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

rp_suman24-Jun-08 16:21

Quick simple question about string

24-Jun-08 16:21

Hi,

It is not related to this problem, this problem resolved already as I replied to Cedric Moonen.

Thanks & Regards,
Suman

--
"Programming is an art that fights back!"

monsieur_jj23-Jun-08 20:16

monsieur_jj

23-Jun-08 20:16

Hi all,

How can I pass to a string variable the content of an environment variable?

for example

string a;

I want the content of a the value of the environment variable TEMP?

Thanks,
Jayjay

Re: Quick simple question about string

_AnsHUMAN_ 23-Jun-08 20:27

_AnsHUMAN_

23-Jun-08 20:27

Does this GetEnvironmentVariable(/*parameters*/) help

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

_AnShUmAn_

Re: Quick simple question about string

monsieur_jj23-Jun-08 20:44

monsieur_jj

23-Jun-08 20:44

Thanks Anshuman it works now

Re: Quick simple question about string

rp_suman23-Jun-08 20:32

how to build the genprint sample

23-Jun-08 20:32

Hi,

I am not sure about data type of environment variable, but if you know the data type, you can use CString variable and format it.

Refer here:CString::Format[^]

What compiler are you using?

Regards,
Suman

--
"Programming is an art that fights back!"

registering uccapi

kumarnitesh23-Jun-08 20:11

kumarnitesh

23-Jun-08 20:11

I have an application which need to start the audio/video settings on a button click. I have written code for that:
************start of code**********************************************
HRESULT hr = CoInitialize(0);
if (FAILED(hr))//CoInitialize failed
return hr;

//Obtain a pointer to the IUccPlatform interface
//by way of the cocreatable UccPlatform class.
CComPtr <IUccPlatform> pIUccPlatform;

hr = CoCreateInstance
(
__uuidof(UccPlatform),
NULL,
CLSCTX_INPROC_SERVER,
__uuidof(IUccPlatform),
(LPVOID *)&pIUccPlatform
);

if (FAILED(hr))
{
AfxMessageBox(IDS_STR_ERROR_COCREATE_INSTANCE);
return hr;
}

CComBSTR bstrAppName = _T("application");
hr = pIUccPlatform->Initialize( bstrAppName);

if (FAILED(hr))
{
AfxMessageBox (IDS_STR_ERROR_INITIALIZE);
return false;
//device settings
}

CComPtr<IUccMediaDeviceSettings> spMediaDeviceSettingsPtr;
pIUccPlatform->QueryInterface( &spMediaDeviceSettingsPtr );

spMediaDeviceSettingsPtr->InvokeTuningWizard((OAHWND)theApp.m_pMainWnd->m_hWnd, UCCTWP_AUDIO | UCCTWP_AUDIO_NONPRIVATE | UCCTWP_AUDIO_NOTIFICATION);
//AfxMessageBox(IDS_STR_ERROR_INVOKE_TUNING_WIZARD);
pIUccPlatform->Shutdown();

*****************End of Code************************

and as I know we have to add the three dlls(UCCAPIRES.dll,UccApi.dll,RTMPLTFM.dll) in application project, I have done that and I also got success in that. But when I run my application on other system after clicking button to start the audio/video settings I got an error message "Error CoCreateInstance ".
If any idea then please share.

Configuration for apllication is

WindowsXp
C++ .net2005

vicky0000023-Jun-08 19:15

vicky00000

23-Jun-08 19:15

Hai all,
I need to build the genprint application which is available in ..../Windows DDK../src/print/genprint sample.. application.

Please help me.

Rajesh R Subramanian23-Jun-08 19:17

23-Jun-08 19:17

What did you try?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

vicky0000023-Jun-08 19:24

vicky00000

23-Jun-08 19:24

hi just i try to build the genprint samples (sample printer driver).please see this link
http://msdn.microsoft.com/en-us/library/aa505860.aspx[^]

Rajesh R Subramanian23-Jun-08 19:34

23-Jun-08 19:34

Well, you haven't answered my question. What did you try? Where and what is the problem?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP