FFI interface?

[GoogleCodeExporter]

I've noticed that there is an NATIVE_CALL opcode, but cannot find any document 
for it.

Original issue reported on code.google.com by wsxiaoys...@gmail.com on 18 May 2011 at 2:58

[GoogleCodeExporter]

That opcode can be used for calling native code, but it was mainly intended for 
testing native code generation from owl. It calls the machine code stored in a 
byte vector, which is assumed to be a function of 3 arguments. A few old tests 
are at 
https://github.com/aoh/owl-lisp/blob/588fabfd69dbf1a5eb714961452586b00b8160a6/mi
sc/native.scm

Owl doesn't have a proper FFI at the moment. Feel free to post here if you have 
need for one and I'll see what I can do, or if you have interest to work on it 
yourself.

Original comment by aohelin on 18 May 2011 at 6:07

• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

This will need to be added at a later, but changing status since I'll have to 
study how this is handled in other languages first. I don't have enough 
experience to decide which of the options would be good, so probably better to 
steal a design that has worked elsewhere.

Original comment by aohelin on 21 Dec 2011 at 1:04

• Changed state: Meditate

[GoogleCodeExporter]

Some Scheme FFI systems I prefered:

chibi-scheme:
http://synthcode.com/scheme/chibi/#h1_CFFI

gambit-scheme:
http://www.iro.umontreal.ca/~gambit/doc/gambit-c.html#C_002dinterface

Original comment by zhangm...@google.com on 25 Dec 2011 at 7:10