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Re: A single High-resolution Timer for multiple threads

David Crow14-Jun-06 4:17

14-Jun-06 4:17

Can't you just have each of the threads call SetTimer()?

"The largest fire starts but with the smallest spark." - David Crow

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

Re: A single High-resolution Timer for multiple threads

Cyber Friend14-Jun-06 4:23

14-Jun-06 4:23

Hi,

DavidCrow wrote:
Can't you just have each of the threads call SetTimer()?

Isn't it a problem that all threads call SetTimer() at the same time.This means if I have 30 threads then I have to create 30 timers at the same time. Is this good for my application to consume so much windows resources.Currently I m creating 4 threads but in future I have to create round about 30 threads, all having separate timer intervals.

Regards.

Cyber Friend

Re: A single High-resolution Timer for multiple threads

David Crow14-Jun-06 4:43

14-Jun-06 4:43

Cyber Friend wrote:
Isn't it a problem that all threads call SetTimer() at the same time.

Technically, they won't be. Since Windows is not a RTOS, each call to SetTimer() would be synchronous.

Cyber Friend wrote:
Is this good for my application to consume so much windows resources.

Probably not.

What exactly are you trying to do? Maybe an alternative solution can be found.

"The largest fire starts but with the smallest spark." - David Crow

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

Re: A single High-resolution Timer for multiple threads

Cyber Friend14-Jun-06 5:45

14-Jun-06 5:45

Hi DavidCrow,
First of all Thanks for your reply.

DavidCrow wrote:
What exactly are you trying to do? Maybe an alternative solution can be found.

The scenario in my application is that:
I have four threads in my application, each of which is listening to a port on a telephony card for incoming calls.When answering a call the thread plays an audio file and if user doesn't press a digit then thread waits for some timer interval to replay that file again. The thread has to replay that file after timer interval expires. And this timer interval may be different for each thread as each thread is running a differt script for telephony flow.

Hopefully You have understood my problem.

Best Regards.

Cyber Friend

Re: A single High-resolution Timer for multiple threads

Tnarol14-Jun-06 3:34

14-Jun-06 3:34

At least I think you can manage to set various events at each timer step that will help synchronize multiple threads.

Don't know if this helps, and don't have an example. Sorry.

header bitmap in property sheet wizard

Tara1414-Jun-06 1:03

14-Jun-06 1:03

Hi,

I have created a wizard using property pager in vc++ mfc. I used the following to add a header.

CWizSheet pex("New Property Sheet");
pex.m_psh.dwFlags |= PSH_WIZARD97;

Please can you tell me
1)How do I add a bitmap to the header?
2)A background color/bitmap to the rest of the page?
3)How do I add the text to the header?

I have found many tutorial explaining how to create a wizard using property pages, but they do not explain how to add a header, bitmap and text to the header. Please help.

Thanks.
Tara

Fortitudine Vinsinues!

strange Cbutton problem [modified]

big_denny_20014-Jun-06 0:43

14-Jun-06 0:43

hi all

Smile | :)

I have MFC application and a public method

void CProject::Something(CButtonDerivedClass bButton)
{
	// No matter what is here
}

When in OnInitDialog I call this method, I get error :

...
Something(m_bDerivedButton);
// bDerivedButton is an object of some CButton derived class
// and is public member variable of current class
...

error : Error 1 error C2248: 'CObject::CObject' : cannot access private member declared in class 'CObject' c:\program files\microsoft visual studio 8\vc\atlmfc\include\afxwin.h 1814

Please help if you can.

thanks

-- modified at 6:47 Wednesday 14th June, 2006

Re: strange Cbutton problem

Christian Graus14-Jun-06 1:05

Christian Graus

14-Jun-06 1:05

At a guess, it looks like the compiler can't make a copy of your class. So, can you pass it as a pointer or reference ?

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Re: strange Cbutton problem

see me14-Jun-06 1:39

14-Jun-06 1:39

Roll eyes | :rolleyes:

Am also think the same. Need to pass the pointer or reference to the function.
Please tel ur result.

yours faithfully
ajeeshcv

WM_DISPLAYCHANGE

GANsJob14-Jun-06 0:42

14-Jun-06 0:42

HI,

HOW TO HANDLE WM_DISPLAYCHANGE MESSAGE

Re: WM_DISPLAYCHANGE

Naveen14-Jun-06 0:48

14-Jun-06 0:48

either check for this message in the WindProc

or add the following entry in message map

ON_MESSAGE( WM_DISPLAYCHANGE, OnDisplayChanged )

now add a new function with name and proto

LRESULT OnDisplayChanged( WPARAM wParam, LPARAM lParam )

nave

Re: WM_DISPLAYCHANGE

GANsJob14-Jun-06 1:13

14-Jun-06 1:13

thankx
dat worked

Create(pPage->m_nDialogID, this),program crashes,why?

iLoveM14-Jun-06 0:36

14-Jun-06 0:36

Thank you!

Just relax

Re: Create(pPage->m_nDialogID, this),program crashes,why?

Hamid_RT14-Jun-06 0:47

14-Jun-06 0:47

Can you be more specific

whitesky

Re: Create(pPage-&gt;m_nDialogID, this),program crashes,why?

_AnsHUMAN_ 14-Jun-06 0:56

14-Jun-06 0:56

Your post doesn't describe itself clearly. What problem are you having?
My guess : Probably you are writing to invalid memory location.
or you are using an invalid pointer somewhere
Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

Wink | ;-)

_AnShUmAn_

Re: Create(pPage->m_nDialogID, this),program crashes,why?

Cedric Moonen14-Jun-06 1:01

14-Jun-06 1:01

Use your debugger to locate te problem. Learn how to use it properly because it is much more helpfull than a forum.

Cédric Moonen
Software developer

Charting control

kakan14-Jun-06 1:13

14-Jun-06 1:13

Can't give you my 5 this time. Last time I was voted down for giving you a 5. Mad | :mad:

Mad | :mad:

(This time I expect to be voted down just beacuse I didn't give you a 5).

Cedric Moonen14-Jun-06 1:22

14-Jun-06 1:22

Laugh | :laugh:

Cédric Moonen
Software developer

Charting control

toxcct14-Jun-06 1:34

14-Jun-06 1:34

i did it...

no matter the votes i get for that.

Cedric gave a true answer, he deserved it, so i give him the vote that expresses at best the value of his post Wink | ;)

Wink | ;)

TOXCCT >>> GEII power

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

kakan14-Jun-06 1:59

14-Jun-06 1:59

If you can accept to be voted down, so can I. Big Grin | :-D

Big Grin | :-D

Cedric got my 5 as well.

toxcct14-Jun-06 2:00

14-Jun-06 2:00

now you gave Ced his '5', i can vote you '1', right ? Roll eyes | :rolleyes:

Roll eyes | :rolleyes:

TOXCCT >>> GEII power

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

kakan14-Jun-06 2:25

14-Jun-06 2:25

Just go for it! Cool | :cool:

Cool | :cool:

Seriously, it seems as if some of the posters doesn't know about the debugger, or even what a great tool the debugger is.

toxcct14-Jun-06 2:26

14-Jun-06 2:26

yup

D'Oh! | :doh:

have they ever heard of Visual C++ ? Blush | :O

Blush | :O

TOXCCT >>> GEII power

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

kakan14-Jun-06 2:33

14-Jun-06 2:33

I guess they think it's complicated when the truth is the opposite:
Guessing what's wrong, now *that's* difficult!
But we know that, it's just a matter of spreading the word (IMO).

BTW, where's my 1? Poke tongue | ;-P

Poke tongue | ;-P

toxcct14-Jun-06 2:35

14-Jun-06 2:35

kakan wrote:
BTW, where's my 1?

i keep it in the warm of my pocket Wink | ;)

Wink | ;)

TOXCCT >>> GEII power

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

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