Re: Is this thread-safe?

From:

Ismo Salonen <Ismo.Salonen@codeit.fi>

Newsgroups:

microsoft.public.vc.language

Date:

Mon, 03 Aug 2009 16:01:01 +0300

Message-ID:

<ufg30pDFKHA.4004@TK2MSFTNGP05.phx.gbl>

Jack wrote:

Thx Scott and Ben,
For your reference,
Here is how I start the thread

cDisplay_Thread::cDisplay_Thread(CDemoView *v)

{

m_v = v;

}

unsigned int __stdcall cDisplay_Thread::Manage_Display(void *arg)

{

// AfxMessageBox("Manage_Display");

OutputDebugString("CDisplay_Thread::Manage_Display\n");

CDemoView *v = (CDemoView*) arg;

while(true)

{

if (v->GetDocument()->m_strRecv.GetLength() != 0)

{

v->UpdateData(FALSE);

}

}

return 0;

}

void cDisplay_Thread::StartThread(void *arg)

{

OutputDebugString("CDisplay_Thread::Start_Thread\n");

_beginthreadex(NULL, 1024, &cDisplay_Thread::Manage_Display,arg, 0, NULL);

}

CDemoDoc::OnNewDocument(....)

{ ...

mt->StartThread(this);

....

}

Thanks

Jack

Basic Rule : You may not use UI threads objects in other thread.
You might get along reading some member variables but calling methods
directly will crash your program. Joseph M. Newcomer has good article on
this subject on his site http://www.flounder.com

ismo