Re: Property Sheet (please help)

From:

"Tom Serface" <tom.nospam@camaswood.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 19 Jul 2007 23:07:30 -0700

Message-ID:

<AB817A62-B86E-4CBF-B038-3AF21D947045@microsoft.com>

Have you thought about just doing a timer or using some code like:

//
// Release main thread for background processing
//
void GiveTime()
{
// Idle until the screen redraws itself, et. al.
MSG msg;
while (::PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE ) ) {
  if (!AfxGetThread()->PumpMessage( )) {
   ::PostQuitMessage(0);
   break;
  }
}
// let MFC do its idle processing
LONG lIdle = 0;
while (AfxGetApp()->OnIdle(lIdle++ ))
  ;
}

to give up some time while doing a loop in your property sheet code. Could
be that the thread is trying to access functions in your property sheet that
are not thread safe and that could be messing it up.

Tom

"vorange" <orangepic@yahoo.com> wrote in message
news:1184904763.336420.52530@n2g2000hse.googlegroups.com...

Hello,

         I have a problem which I have not been able to solve for a
whole 2 days. I have a dialog program but I changed it to launch a
modal property sheet instead of a dialog. I have added property pages
(each page as a separate class) to this property sheet successfully.
The property sheet has a Cancel button at the bottom.

In the property sheet I have a worker thread. If I do not access
functions in the pages of the property sheet, I am able to exit the
thread just fine. But if I am running something in a page, then I am
not able to exit the thread successfully. It just stalls the app.

Any idea why this is the case? All my pages are organized as separate
classes and I make an object of them in my property sheet (the parent
class). So what is the problem?

I desparately need help on this as its beginning to exhaust me. Thank
you.

---------------

// how I start the thread
void CPropSheet::StartThread(void)
{
   pthread=AfxBeginThread(Packrat,this,THREAD_PRIORITY_NORMAL, 0,
CREATE_SUSPENDED);
   pthread->m_bAutoDelete = true;
   exitthread = 0;
   pthread->ResumeThread(); // runs functions in certain pages of the
property sheet
}

// the thread
UINT Packrat( LPVOID pParam )
{
CPropSheet *p = (CPropSheet*)pParam;
while(exitthread != 1)
{
     p->RecvData(); // gets incoming data
}
exitthread = 5;
return 0;
}

// how I exit the thread
void CPropSheet::EndThread(void)
{
exitthread = 1;
while(exitthread != 5);

}