Forum: IronRuby Fwd: Ruby FFI port

Well, I think I've made a little progress - hoping to attach a simple
function soon.

I am concerned about one thing though - we need to be able to call 
function
pointers, but I think that *Marshal.GetDelegateForFunctionPointer* only
supports the STD calling convention. Any thoughts on how we might 
support
cdecl?  Presently, it's not a blocking concern - so I'll cross that 
bridge
when the time comes...


Wayne: Sorry - I meant to send that to the mailing list, as opposed to
sending it directly to you.

-Charles

Well, with some really, *really *ugly hacking, I've managed to get this 
far
(the first example from FFI wiki):

irb(main):011:0> module Hello
irb(main):012:1>   extend FFI::Library
irb(main):013:1>   ffi_lib FFI::Library::LIBC
irb(main):014:1>   attach_function 'puts', [ :string ], :int
irb(main):015:1> end
*(Object doesn't support #inspect)*
=>
irb(main):016:0> Hello.puts("Hello, World")
Hello, World
=> 0

(dunno why that *"(Object doesn't support #inspect)"* shows up...)

Anywho, I think we might might have a significant portion of FFI 
implemented
fairly soon.  The codebase is still pretty unstable/crappy, but I'm 
hoping
to get it ready for contributions soon.

-Charles



On Sun, Mar 27, 2011 at 6:28 PM, Charles Strahan <

> I am concerned about one thing though - we need to be able to call function
> pointers, but I think that *Marshal.GetDelegateForFunctionPointer* only
> supports the STD calling convention. Any thoughts on how we might support
> cdecl?  Presently, it's not a blocking concern - so I'll cross that bridge
> when the time comes...


D'oh! I overlooked the
UnmanagedFunctionPointerAttribute<http://msdn.microsoft.com/en-us/library/system.run...
.

-Charles

On Thu, Mar 31, 2011 at 4:41 AM, Charles Strahan <

Are you coming to ALT.NET Seattle? We have an OSS track this year to 
help people learn how to contribute to projects. Interested?

Ryan

Sent from my iPhone

Ryan,

I'm *absolutely* interested, but, as much as it shames me to say, the
ALT.NET Seattle conference wasn't on my radar until just now.

I'm down for next year though, especially if you plan to give an F#
workshop.

-Charles

All,

IronRuby FFI is coming along well.  So far, I support most of the
FFI::Function uses, including attaching to function pointers, library
functions, and wrapping Procs.

Structs are at 50%, and callbacks need to be implemented.

I'll need just another week or two to cut the first release.

-Charles


On Thu, Mar 31, 2011 at 5:00 AM, Charles Strahan <

> I'll need just another week or two to cut the first release.

Maybe it can merge with mainline ffi gem at some point?
-r

That's a possibility, but it might have to come further down the road.

-Charles

I just wanted to check how the Ruby FFI library was coming along?