I have a class (CArchSockListener) which is derived from CSocket.
I'm using C++ in Visual Studio 2005 Team Suite, (release version, not beta).
When my class was used directly from a dialog based app, I had no touble.
I wanted to move the comms to a separate thread, so I derived a new thread class (CCommsThread) from CWinThread, and constructed my CSocket derived class in there using this code in CCommsThread::Run()...
// Start the archive throughput listener
m_pArchSockListener = new CArchSockListener(); // 1 m_pArchSockListener->m_pParent = this; // 2 m_pArchSockListener->Create(61000); // 3 m_pArchSockListener->Listen(); // 4The problem is that my code now crashes on line 3.
The call stack shows that the crash occurs in the (MS provided) map_pp.cpp file at line 179 shown here...
CMapPtrToPtr::GetValueAt(void* key)
{
ENSURE(this); // crash occurs here.
...
}
Looking up through the call stack, this appears to be because pState in CAsyncSocket::AttachHandle(...) (also MS code - not mine) which is _afxSockThreadState. points to a state which has m_pmapSocketHandle == NULL.
So my question is, does my CSocket derived class have to run in a GUI thread Or how do I get my CSocket based class to work from within a CWinThread
CSocket derived class throws exception on call to Create()
n1patrick
Silly me.
I had not called AfxSocketInit() in the thread.
How easily we forget to do the things that the MFC AppWizard does for us....
A1ien51
Try and follow the guidelines from this KB article :-
http://support.microsoft.com/kb/q140527/