uds/ASDS.icl

   1 implementation module ASDS
   2
   3 import Data.Functor
   4 import Control.Monad
   5
   6 import ASDS.Source
   7 import ASDS.Lens
   8 import ASDS.Select
   9 import ASDS.Parallel
  10
  11 sds :: (sds m p r w) -> SDS m p r w | read sds & write sds & Monad m
  12 sds s = SDS s (pure ())
  13
  14 instance read SDS where read (SDS s _) p = read s p
  15 instance write SDS where write (SDS sds _) p w = write sds p w
  16
  17 getShare :: (sds m () r w) -> m r | Monad m & read sds & TC r & TC w
  18 getShare s = read s () >>= \v->case v of
  19         Reading s = getShare s
  20         Read r = pure r
  21
  22 setShare :: w (sds m () r w) -> m () | Monad m & write sds & TC r & TC w
  23 setShare w s = write s () w >>= \v->case v of
  24         Writing s = setShare w s
  25         Written _ = pure ()
  26
  27 updShare :: (r -> w) (sds m () r w) -> m w | Monad m & read sds & write sds & TC r & TC w
  28 updShare f s = f <$> getShare s >>= \v->setShare v s >>| pure v