Re: SaveBarState fails when it is called from a thread

From:
"Ajay Kalra" <ajaykalra@yahoo.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Wed, 9 Jul 2008 09:57:22 -0400
Message-ID:
<18E8263F-BC50-4774-BF85-59F1B6C11063@microsoft.com>
Do it from GUI thread only. Also make sure each CControlBar has a distinct
ID. The ID is the last parameter in the method when you create it.

--
Ajay

"Faisal" <faisalm83@gmail.com> wrote in message
news:94e71451-6e68-45ae-9986-c1b582d2442c@t54g2000hsg.googlegroups.com...

Hi,

In my application, I use SaveBarState() for persisting control bar
state.
The code fragment is something like this.

void CMainFrame::OnSavePersistance()
{
SaveBarState(_T("My Persistence"));
      // Saves some information to an xml file
}

Since my xml saving takes some time I changed the code to execute in a
thread

UINT ThreadFn(LPVOID pParam)
{
CMainFrame* pThis = (CMainFrame*)pParam;
pThis->SaveBarState(_T("My Persistence"));

return 0;
}

void CMainFrame::OnCntrlbartst()
{
AfxBeginThread( ThreadFn, this );
}

But, now in the thread function SaveBarState() fails. It shows some
assertion in debug version. I think it is due to some mismatch in
MODULE_STATE.

statck trace for assert
CWnd::AssertValid() line 879 + 25 bytes
CControlBar::AssertValid() line 976
CStatusBar::AssertValid() line 732
AfxAssertValidObject(const CObject * 0x00431510 {CStatusBar
hWnd=0x00180c7e}, const char * 0x5f4ccfe8 THIS_FILE, int 531) line 108
CControlBar::GetBarInfo(CControlBarInfo * 0x00433d70) line 534
CFrameWnd::GetDockState(CDockState & {CDockState}) line 520
CFrameWnd::SaveBarState(const char * 0x0041844c `string') line 443
ThreadFn(void * 0x00431450) line 174

How can I avoid this problem.

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