Re: FFI question #2: Getting the address of a C function

• To: info-dylan@ai.mit.edu
• Subject: Re: FFI question #2: Getting the address of a C function
• From: Chris Double <chris@double.co.nz>
• Date: Sat, 22 Jul 2000 02:01:05 -0400 (EDT)
• Organization: None.
• References: <8la6bs$q4p$1@nnrp1.deja.com> <3978BCC5.AED0DC35@cup.hp.com> <8lb4j7$fvl$1@nnrp1.deja.com>
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• Xref: traf.lcs.mit.edu comp.lang.dylan:12494

oodl@my-deja.com writes:

> My hunch is that the FFI has the functionality I am describing, but it
> is not documented.  But I could very well be wrong.  What does the
> "define c-function" macro expand to?

Although I haven't tried any of it, look at the source code for
x86-win32-operating-system.dylan in the sources/lib/operating-system
directory. There you will see code like:

  %call-c-function ("GetVersionExA", c-modifiers: "__stdcall")
    (lpOSVersionInfo :: <raw-c-pointer>) => (success? :: <raw-c-signed-int>)
	(primitive-cast-raw-as-pointer(primitive-string-as-raw(buffer)))

Perhaps you can work out how to call these functions. Possible in the
dylan-direct-c-ffi library. Searching this library using the browser
might highlight other useful functions.

Let me know if you get it going as I'd be interested.

Cheers,
Chris.
-- 
http://www.double.co.nz/dylan

• FFI question #2: Getting the address of a C function
• From: oodl@my-deja.com
• Re: FFI question #2: Getting the address of a C function
• From: Eric Gouriou <egouriou@cup.hp.com>
• Re: FFI question #2: Getting the address of a C function
• From: oodl@my-deja.com

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