Re: [program-l] C++/Win32 coder required
- From: "Ian D. Nichols" <inich@xxxxxxxxxx>
- To: <program-l@xxxxxxxxxxxxx>
- Date: Fri, 13 Nov 2009 12:38:53 -0500
Hi Tim,
Your message about callback functions was very timely for me because it
speaks to the question I put to the ProgrammingBlind List early this week
under the subject "Puzzling behaviour". My problem turned out to be one of
having a callback function within a class. I resolved the problem by moving
the callback to global scope, and this seems to suit my purpose. The
article you gave the link to explains that what I did won't work under all
circumstances, and gives the solution to the problem.
For the information of those who responded to me on the other List, here is
your article's first paragraph.
"The Win32 SDK provides a rich set of functionality to applications written
in either C or C++. In most cases, the fact that the SDK has its roots in C
is
of no consequence to the C++ programmer. The Win32 callback interface is one
area that presents an exception. Here, the C++ programmer cannot ignore C's
influence
on the evolution of the SDK. Specifically, getting the SDK to invoke a C++
member function as a callback requires a few special techniques."
Thanks, Tim, for your enlightenment.
Ian
Ian D. Nichols,
Toronto, Canada
----- Original Message -----
From: "Tim Burgess" <tim@xxxxxxxxxxxxx>
To: <program-l@xxxxxxxxxxxxx>
Sent: Friday, November 13, 2009 4:54 AM
Subject: [program-l] C++/Win32 coder required
Hi,
I've hit a bit of a brick wall with a freeware application I'm trying to
get
out of the door - it's back to my old issue of calling methods from within
a callback routine inside a c++ class. I have a good article that
explains
the issue and provides a good solution that is thread-safe
(http://www.ddj.com/cpp/184403375), but I'm not really a c++ programmer
and
time is at a premium. If anybody's interested in doing a couple of hours
work on this then I'd be interested to know what the rate would be -
please
post off-list and I'll see if I can make this happen.
Although the product will be distributed for free, it encapsulates a
protocol that I've had to sign an NDA to get documentation for so, despite
the required work won't involve this stuff, it will be necessary for any
participant to sign a copy of the NDA before viewing my code.
Best wishes.
Tim Burgess
Raised Bar Ltd
Phone: +44 (0)1827 719822
Mobile: 07989 486976
Web: http://www.raisedbar.net
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