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Add an API to wrap an index of a MutArray into an Unboxed IORef #2563

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Add an API to wrap an index of a MutArray into an Unboxed IORef #2563

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37a27df
Add an API to wrap an index of a MutArray into an Unboxed IORef
rnjtranjan Aug 22, 2023
b8c6748
Add APIs with Index
rnjtranjan Aug 22, 2023
2a6dd50
Fix up
rnjtranjan Aug 25, 2023
6d6035f
Fix up
rnjtranjan Aug 25, 2023
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10 changes: 5 additions & 5 deletions core/src/Streamly/Internal/Data/IORef/Unboxed.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -49,8 +49,8 @@ import Streamly.Internal.Data.Unbox

import qualified Streamly.Internal.Data.Stream.Type as D

-- | An 'IORef' holds a single 'Unbox'-able value.
newtype IORef a = IORef MutableByteArray
-- | An 'IORef' holds a single 'Unbox'-able value with offset.
data IORef a = IORef !MutableByteArray !Int

-- | Create a new 'IORef'.
--
Expand All @@ -60,21 +60,21 @@ newIORef :: forall a. Unbox a => a -> IO (IORef a)
newIORef x = do
var <- newBytes (sizeOf (Proxy :: Proxy a))
pokeByteIndex 0 var x
return $ IORef var
return $ IORef var 0

-- | Write a value to an 'IORef'.
--
-- /Pre-release/
{-# INLINE writeIORef #-}
writeIORef :: Unbox a => IORef a -> a -> IO ()
writeIORef (IORef var) = pokeByteIndex 0 var
writeIORef (IORef var o) = pokeByteIndex o var

-- | Read a value from an 'IORef'.
--
-- /Pre-release/
{-# INLINE readIORef #-}
readIORef :: Unbox a => IORef a -> IO a
readIORef (IORef var) = peekByteIndex 0 var
readIORef (IORef var o) = peekByteIndex o var

-- | Modify the value of an 'IORef' using a function with strict application.
--
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