Tue Jan 08 22:57:15 2013: Request 42694 was acted upon.
Transaction: Correspondence added by BULKDD
Queue: Win32-API
Subject: Callback and Structs
Broken in: 0.58
Severity: Normal
Owner: Nobody
Requestors: [email protected]
Status: open
Ticket <URL: https://rt.cpan.org/Ticket/Display.html?id=42694 >
On Fri Oct 19 04:19:35 2012, BULKDD wrote:
> On Thu Jan 22 21:13:41 2009, juniorc wrote:
> > Cosimo,
> >
> > I am currently writing a Win32::Video::Capture module making calls to
> > avicap32.dll. Several "messages" require the use of "structs" and
> > "callbacks". Thank to the "callback3.pl" example in the sample
> > directory, it was clear how to use nested structs in a callback
> > environment. Unfortunately both in my own code and the aforementioned
> > example I encure repetitive errors: "Attempt to free unreferenced
> > scalar". More details in the logs below.
> > At the current time and in order to proceed without the
> > Win32::API::Struct, I am using the Win32::API::Callback and a few calls
> > to the "RtlMoveMemory" and "lstrcpy" functions of the kernel32.dll.
> > Although this work without any issues, I have to say the approach lacks
> > the "elegance & readability" that the use of Win32::API::Struct would
> > give. It seems that there might be an "extra" call to a "sv_2mortal" in
> > the XS portion. Is there anything i can do on my end to help?
> >
> > Thank you in advance,
> >
> > Giuseppe "Jr."
>
> Can you try the latest CPAN version of Win32::API (0.72) and report how
> it works for you?
Try 2. The current version is 0.74 on CPAN.
