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Re: Help avoiding exception in Win32::API ?

by PodMaster (Abbot)
on Sep 15, 2005 at 07:53 UTC ( #492134=note: print w/replies, xml ) Need Help??

in reply to Help avoiding exception in Win32::API ?

Every time I call a C-function that uses arguments, I get an exception that causes Perl to quit.
What exception (what's the message you receive)? You need to investigate (maybe fire up Event Viewer, or a debugger).

You might need to make sure that your DLL is compiled with the -MD flag (or whatever perl -V:ccflags reports).

update: also, try enabling Win32::API::DEBUG and edit API.h and #define WIN32_API_DEBUG.

I did some testing, and I get a memory access violation in the perl dll, and I've tracked it down to API.xs line 651         XSRETURN_IV(lReturn);. It happens with Win32-API-0.41 and perl 5.8.4, 5.6.2, 5.8.7, but not 5.8.6, go figure. XSRETURN_IV comes from XSUB.h (official api). You should solicit help from the author and the perl5-porters. Here's the verbatim debug output

(XS)Win32::API::Call: params[0].t=1, .u=137 (XS)Win32::API::Call: parameter 0 (N) is 137 (XS)Win32::API::Call: Calling ApiFunctionInteger() (XS)Win32::API::Call: ApiFunctionInteger returned 138 (XS)Win32::API::Call: freeing memory... (XS)Win32::API::Call: returning to caller. (XS)Win32::API::Call: returning 138.

MJD says "you can't just make shit up and expect the computer to know what you mean, retardo!"
I run a Win32 PPM repository for perl 5.6.x and 5.8.x -- I take requests (README).
** The third rule of perl club is a statement of fact: pod is sexy.

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Re^2: Help avoiding exception in Win32::API ?
by jimbojones (Friar) on Sep 16, 2005 at 14:18 UTC

    Thanks for the suggestions. I will pull down the source and rebuild Win32::API as you suggest (I had been using the pre-compiled binaries from Activestate).

    I've also started looking at Swig to create a direct connection to the actual .dll that I need to use.

    Thanks for the help, J

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