1 files changed, 40 insertions, 0 deletions
diff --git a/hsm-cam/Hsm/Cam/FFI.hsc b/hsm-cam/Hsm/Cam/FFI.hsc
new file mode 100644
index 0000000..44f3f4b
--- /dev/null
+++ b/hsm-cam/Hsm/Cam/FFI.hsc
@@ -0,0 +1,40 @@
+{-# LANGUAGE CApiFFI #-}
+
+module Hsm.Cam.FFI
+  ( makeLogger
+  , registerLogger
+  , makeCallback
+  , registerCallback
+  , initializeFFI
+  , shutdownFFI
+  , requestCapture
+  )
+where
+
+import Foreign.C.String (CString)
+import Foreign.Ptr (FunPtr)
+
+type Logger = Int -> CString -> IO ()
+
+type Callback = Int -> IO ()
+
+foreign import ccall safe "wrapper"
+  makeLogger :: Logger -> IO (FunPtr Logger)
+
+foreign import capi safe "Cam.hpp register_logger"
+  registerLogger :: FunPtr Logger -> IO ()
+
+foreign import ccall safe "wrapper"
+  makeCallback :: Callback -> IO (FunPtr Callback)
+
+foreign import capi safe "Cam.hpp register_callback"
+  registerCallback :: FunPtr Callback -> IO ()
+
+foreign import capi safe "Cam.hpp initialize_ffi"
+  initializeFFI :: IO ()
+
+foreign import capi safe "Cam.hpp shutdown_ffi"
+  shutdownFFI :: IO ()
+
+foreign import capi safe "Cam.hpp request_capture"
+  requestCapture :: IO ()