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PostQuitMessage(0) causes crash
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znakeeye View Drop Down
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    Posted: 08 August 2009 at 7:55am
XTP 13.1.
 
During startup:
XTPImageManager()->InternalAddRef();
m_pItems->SetImageManager(XTPImageManager());
 
And later:
PostQuitMessage(0);
 
Causing a crash in CCmdTarget::~CCmdTarget() for CXTPImageManager.
 
Any ideas?
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Oleg View Drop Down
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Points: 11234 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Oleg Quote  Post ReplyReply Direct Link To This Post Posted: 10 August 2009 at 3:20am

Hi,

Please show call stack.
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znakeeye View Drop Down
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Very easy to reproduce with your SDI-sample:
 
int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    ...
    ...
   
    PostMessage(WM_COMMAND, ID_STYLES_CHANGE);
 
    return 0;
}
 
void CMainFrame::OnEmptyCommand()
{
    PostQuitMessage(0);
}
 
 
Probably not an issue, but still suspect that it crashes like this...
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Oleg View Drop Down
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Points: 11234 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Oleg Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2009 at 3:02am
Hi,
 
I don't think PostQuitMessage is best way to terminate application - destructor of CMainFrame is not called and its reason of issue.   Just close MainWindow instead if you need quit.
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znakeeye View Drop Down
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I agree, but suppose some badly written code does this. Is it possible to destroy the object somehow? CWinApp::PreTranslateMessage?
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Tomasz View Drop Down
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Still, I don't see any reason why PostQuitMessage would need to create crash with XTP ? Isn't it a bug?

http://blogs.msdn.com/oldnewthing/archive/2005/11/04/489028.aspx
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znakeeye View Drop Down
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Sure it's a bug.
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