Re: MFC app - add multithreading?

From:

"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 1 Apr 2010 00:45:49 -0400

Message-ID:

<ucyj1YV0KHA.4832@TK2MSFTNGP04.phx.gbl>

"CBudz" <CBudz@discussions.microsoft.com> wrote in message
news:DD130077-0755-4705-891A-685040F4B879@microsoft.com...

Hello, I have a MFC app source and am adding some TCP/IP functionality.
The
current design is not multithreaded and sending/receiving sockets
interferes
with timeouts (waiting for client to connect, receiving messages, etc.).
I'd
like to spawn a thread to handle the TCP/IP then signal an event and the
app
will take care of the rest. I'm new to MFC; have never used it before
looking at this app's source. Can I create a worker thread to handle my
socket communications?

Thanks,
Chris

Certainly you can create a worker thread in MFC. Call AfxBeginThread with a
thread function pointer.

Your mention of timeout delays implies you are thinking in terms of blocking
sockets. But winsock (and MFC) have a better way. You can use CAsyncSocket
to create a socket that never blocks. Lengthy operations are handled by an
operating system thread and it sends you notifications when their results
are ready. This makes it generally unnecessary to put the sockets in a
secondary thread: They can happily coexist within the GUI thread.

There are articles on both of these subjects at
http://www.flounder.com/mvp_tips.htm

--
Scott McPhillips [VC++ MVP]