Re: Is this thread-safe?

From:
"Ben Voigt [C++ MVP]" <bvoigt@newsgroup.nospam>
Newsgroups:
microsoft.public.vc.language
Date:
Sun, 2 Aug 2009 09:13:04 -0500
Message-ID:
<A71F1A9F-7818-4B52-B7F6-67CE496457C7@microsoft.com>
"Jack" <jl@knight.com> wrote in message
news:#u0#pE0EKHA.1540@TK2MSFTNGP04.phx.gbl...

Hi guys

[code]
unsigned int __stdcall cDisplay_Thread::Manage_Display(void *arg)
{
 OutputDebugString("CDisplay_Thread::Manage_Display\n");
CDemoView *v = (CDemoView*) arg;

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

  v->UpdateData(FALSE);

 }
}
  return 0;

}
[/code]

Is this code snippet above thread safe?


Is your CDemoView object or its associated document modified from any other
thread? If it is, then this code is not safe.

This crashes on v->UpdateData(FALSE); (Doing DataExchange)
v is CFormView
The GetDocument function above it just works fine..
I tried to declare a member variable in cDisplay_Thread::Manage_Display,
but I can't keep it persistant.... Any comments?
Thanks
Jack

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