Generate FunPtr for ForeignPtr finalisation

[sumo]

My primary use case is to get a FunPtr that can be used in newForeignPtr so would like to get inline-c to return a function pointer

For example:

C function:

void pairing_clear(pairing_t pairing);

and corresponding Haskell:

freePairing :: Ptr PBCPairing -> IO () freePairing ptr = [C.exp| void { pairing_clear (struct pairing_s *ptr) } |]

I would like to do:

allocPairing :: IO (ForeignPtr PBCPairing) allocPairing = malloc >>= newForeignPtr [C.??? | ...]

[bitonic]

you can use mkFunPtrFromName, e.g. mkFunPtrFromName 'freePairing.

[sumo]

Unfortunately this does not work for finalizers and results in:

test-pbc: error: a C finalizer called back into Haskell. This was previously allowed, but is disallowed in GHC 6.10.2 and later. To create finalizers that may call back into Haskell, use Foreign.Concurrent.newForeignPtr instead of Foreign.newForeignPtr.

I'm actually not sure if what I am asking for is a good use case for inline-c as the foreign call method is concise and works well.