[Haskell-cafe] Injecting Haskell into C

[Simon Peyton-Jones]

Anatoly

I have not been following the details, but would you consider writing up your example on the GHC user guide Wiki?
        http://haskell.org/haskellwiki/GHC/Using_the_FFI

It's a very good way to share your experience with others.

Simon

| -----Original Message-----
| From: haskell-cafe-bounces at haskell.org [mailto:haskell-cafe-
| bounces at haskell.org] On Behalf Of Anatoly Yakovenko
| Sent: 24 September 2008 22:42
| To: roma at ro-che.info
| Cc: haskell
| Subject: Re: [Haskell-cafe] Injecting Haskell into C
|
| you'll find this example really helpfull
|
|
| ---------- Forwarded message ----------
| From: Claude Heiland-Allen <claudiusmaximus at goto10.org>
| Date: 2008/6/5
| Subject: Re: [Haskell-cafe] example of FFI FunPtr
| To: "Galchin, Vasili" <vigalchin at gmail.com>
| Cc: haskell <haskell-cafe at haskell.org>
|
|
| Galchin, Vasili wrote:
| >
| > Hello,
| >
| >       I want to model a Haskell function that is a callback from C. I have
| > only found one example in the unix package's Semaphore.hsc, which
| apparently
| > is not used. I want to be able to marshall a Haskell function that is a
| > first class citizen residing in a Haskell data type and pass to a C
| function
| > via FFI. Are there examples of this?
|
| Attached is a simple example.
|
| The main thing to note is 'foreign import ccall "wrapper"' which gives
| you a factory for turning Haskell functions into foreign function
| pointers.
|
| More information:
|
| http://www.cse.unsw.edu.au/~chak/haskell/ffi/
|
|
| Claude
| --
| http://claudiusmaximus.goto10.org
|
|
| CallBacker: CallBacker.hs callerback.c callerback.h
|        ghc -O2 -Wall -fffi -o CallBacker CallBacker.hs callerback.c
|
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