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Re: Shared memory and IDL [message #29283]

Tue, 12 February 2002 02:33

Gert Van de Wouwer
Messages: 21
Registered: January 2002

Junior Member

"Jean-Claude Maitre" <jeanclaude.maitre@med.ge.com> wrote in message
news:b1857f9.0202110331.428b6f46@posting.google.com...
> I would like to use shared memory in order to pass images from an
> application written in C and IDL.Does anybody know how to retrieve in
> IDL a segment of shared memory allocated in C ?
>
> Thanks

Hi,

the answers to my post 'Matrox Framegrabber Interface' may also be of
interest to you.

I think that if you want to allocate memory in C and continue to use this in
IDL, you need to use something like IDL_MakeTempArray. This doesnt work if
you use call_external (correct ne if i am wrong), so you need the
linkimage-method. The documentation in edg.pdf is'nt too complete...

I use the call external way in the following way:
in IDL:
image = bytarr(512,512)
call_external(mydll,...,image)

in C++
IDL_LONG IDL_CDECL myDll( int argc, void* argv[])
{
BYTE* pbImIn = (BYTE*)argv[0];
/* use pBImIn to process, or fill image */
...

}

regards,

Gert

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		Re: Shared memory and IDL By: Gert Van de Wouwer on Tue, 12 February 2002 02:33
		Re: Shared memory and IDL By: Craig Markwardt on Mon, 11 February 2002 11:12

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