Galchin Vasili wrote: > Let's take a concrete but "made up" case .. suppose we want to call > through to pthread_create and pass the (void *) argument to pthread_create > which in turn gets interpreted by the pthread that is launched. How would > one populate the C struct that is passed to the launched pthread keeping > in mind that this C struct is variable in length? From the FFI how would > one model this C struct?
In this case I'd use Storable a => Ptr a and provide an instance Storable for the actual type you want to marshal. You can allocate the struct with Foreign.Marshal.Alloc.malloc and marshall it from Haskell to C with Foreign.Storable.poke. Cheers Ben _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
