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Make envRefs store Refs instead of juggling Ints

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This commit is contained in:
Andrzej Rybczak 2024-10-06 14:39:43 +02:00
parent 703e637807
commit c2d373b767
10 changed files with 99 additions and 53 deletions
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6
.github/workflows/haskell-ci.yml vendored
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@ -248,11 +248,11 @@ jobs:
- name: doctest
run: |
cd ${PKGDIR_effectful_core} || false
doctest -XHaskell2010 -XBangPatterns -XConstraintKinds -XDataKinds -XDeriveFunctor -XDeriveGeneric -XFlexibleContexts -XFlexibleInstances -XGADTs -XGeneralizedNewtypeDeriving -XImportQualifiedPost -XLambdaCase -XMultiParamTypeClasses -XNoStarIsType -XPolyKinds -XRankNTypes -XRoleAnnotations -XScopedTypeVariables -XStandaloneDeriving -XTupleSections -XTypeApplications -XTypeFamilies -XTypeOperators src
doctest -XHaskell2010 -XBangPatterns -XConstraintKinds -XDataKinds -XDeriveFunctor -XDeriveGeneric -XDerivingStrategies -XFlexibleContexts -XFlexibleInstances -XGADTs -XGeneralizedNewtypeDeriving -XImportQualifiedPost -XLambdaCase -XMultiParamTypeClasses -XNoStarIsType -XPolyKinds -XRankNTypes -XRoleAnnotations -XScopedTypeVariables -XStandaloneDeriving -XTupleSections -XTypeApplications -XTypeFamilies -XTypeOperators src
cd ${PKGDIR_effectful_th} || false
doctest -XHaskell2010 -XBangPatterns -XConstraintKinds -XDataKinds -XDeriveFunctor -XDeriveGeneric -XFlexibleContexts -XFlexibleInstances -XGADTs -XGeneralizedNewtypeDeriving -XImportQualifiedPost -XLambdaCase -XMultiParamTypeClasses -XNoStarIsType -XPolyKinds -XRankNTypes -XRecordWildCards -XRoleAnnotations -XScopedTypeVariables -XStandaloneDeriving -XTupleSections -XTypeApplications -XTypeFamilies -XTypeOperators src
doctest -XHaskell2010 -XBangPatterns -XConstraintKinds -XDataKinds -XDeriveFunctor -XDeriveGeneric -XDerivingStrategies -XFlexibleContexts -XFlexibleInstances -XGADTs -XGeneralizedNewtypeDeriving -XImportQualifiedPost -XLambdaCase -XMultiParamTypeClasses -XNoStarIsType -XPolyKinds -XRankNTypes -XRecordWildCards -XRoleAnnotations -XScopedTypeVariables -XStandaloneDeriving -XTupleSections -XTypeApplications -XTypeFamilies -XTypeOperators src
cd ${PKGDIR_effectful} || false
doctest -XHaskell2010 -XBangPatterns -XConstraintKinds -XDataKinds -XDeriveFunctor -XDeriveGeneric -XFlexibleContexts -XFlexibleInstances -XGADTs -XGeneralizedNewtypeDeriving -XImportQualifiedPost -XLambdaCase -XMultiParamTypeClasses -XNoStarIsType -XPolyKinds -XRankNTypes -XRecordWildCards -XRoleAnnotations -XScopedTypeVariables -XStandaloneDeriving -XTupleSections -XTypeApplications -XTypeFamilies -XTypeOperators src
doctest -XHaskell2010 -XBangPatterns -XConstraintKinds -XDataKinds -XDeriveFunctor -XDeriveGeneric -XDerivingStrategies -XFlexibleContexts -XFlexibleInstances -XGADTs -XGeneralizedNewtypeDeriving -XImportQualifiedPost -XLambdaCase -XMultiParamTypeClasses -XNoStarIsType -XPolyKinds -XRankNTypes -XRecordWildCards -XRoleAnnotations -XScopedTypeVariables -XStandaloneDeriving -XTupleSections -XTypeApplications -XTypeFamilies -XTypeOperators src
- name: cabal check
run: |
cd ${PKGDIR_effectful_core} || false

1
doctest.sh
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@ -19,6 +19,7 @@ run_doctest() {
-XDataKinds \
-XDeriveFunctor \
-XDeriveGeneric \
-XDerivingStrategies \
-XFlexibleContexts \
-XFlexibleInstances \
-XGADTs \

1
effectful-core/effectful-core.cabal
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@ -39,6 +39,7 @@ common language
DataKinds
DeriveFunctor
DeriveGeneric
DerivingStrategies
FlexibleContexts
FlexibleInstances
GADTs

8
effectful-core/src/Effectful/Dispatch/Dynamic.hs
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@ -1096,16 +1096,14 @@ copyRefs src@(Env soffset srefs _) dest@(Env doffset drefs storage) = do
requireMatchingStorages src dest
let size = sizeofPrimArray drefs - doffset
es = reifyIndices @es @srcEs
esSize = 2 * length es
esSize = length es
mrefs <- newPrimArray (esSize + size)
copyPrimArray mrefs esSize drefs doffset size
let writeRefs i = \case
[] -> pure ()
(x : xs) -> do
let ix = soffset + 2 * x
writePrimArray mrefs i $ indexPrimArray srefs ix
writePrimArray mrefs (i + 1) $ indexPrimArray srefs (ix + 1)
writeRefs (i + 2) xs
writePrimArray mrefs i $ indexPrimArray srefs (soffset + x)
writeRefs (i + 1) xs
writeRefs 0 es
refs <- unsafeFreezePrimArray mrefs
pure $ Env 0 refs storage

125
effectful-core/src/Effectful/Internal/Env.hs
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@ -1,9 +1,13 @@
{-# LANGUAGE AllowAmbiguousTypes #-}
{-# LANGUAGE CPP #-}
{-# LANGUAGE MagicHash #-}
{-# LANGUAGE UnboxedTuples #-}
{-# OPTIONS_HADDOCK not-home #-}
module Effectful.Internal.Env
( -- * The environment
Env(..)
, Ref(..)
, Version
, Storage(..)
, AnyEffect
, toAnyEffect
@ -49,6 +53,8 @@ import Control.Monad.Primitive
import Data.IORef.Strict
import Data.Primitive.PrimArray
import Data.Primitive.SmallArray
import Data.Primitive.Types
import GHC.Exts ((*#), (+#))
import GHC.Stack
import Effectful.Internal.Effect
@ -81,15 +87,50 @@ type role Env nominal
--
data Env (es :: [Effect]) = Env
{ envOffset :: !Int
, envRefs :: !(PrimArray Int)
, envRefs :: !(PrimArray Ref)
, envStorage :: !(IORef' Storage)
}
-- | Reference to the effect in 'Storage'.
data Ref = Ref !Int !Version
instance Prim Ref where
sizeOf# _ = 2# *# sizeOf# (undefined :: Int)
alignment# _ = alignment# (undefined :: Int)
indexByteArray# arr# i# =
let ref = indexByteArray# arr# (2# *# i#)
version = indexByteArray# arr# (2# *# i# +# 1#)
in Ref ref version
readByteArray# arr# i# =
\s0 -> case readByteArray# arr# (2# *# i#) s0 of
(# s1#, ref #) -> case readByteArray# arr# (2# *# i# +# 1#) s1# of
(# s2#, version #) -> (# s2#, Ref ref version #)
writeByteArray# arr# i# (Ref ref version) =
\s0 -> case writeByteArray# arr# (2# *# i#) ref s0 of
s1 -> case writeByteArray# arr# (2# *# i# +# 1#) version s1 of
s2 -> s2
indexOffAddr# addr# i# =
let ref = indexOffAddr# addr# (2# *# i#)
version = indexOffAddr# addr# (2# *# i# +# 1#)
in Ref ref version
readOffAddr# addr# i# =
\s0 -> case readOffAddr# addr# (2# *# i#) s0 of
(# s1, ref #) -> case readOffAddr# addr# (2# *# i# +# 1#) s1 of
(# s2, version #) -> (# s2, Ref ref version #)
writeOffAddr# addr# i# (Ref ref version) =
\s0 -> case writeOffAddr# addr# (2# *# i#) ref s0 of
s1 -> case writeOffAddr# addr# (2# *# i# +# 1#) version s1 of
s2 -> s2
-- | Version of the effect.
newtype Version = Version Int
deriving newtype (Eq, Ord, Prim, Show)
-- | A storage of effects.
data Storage = Storage
{ stSize :: !Int
, stVersion :: !Int
, stVersions :: !(MutablePrimArray RealWorld Int)
, stVersion :: !Version
, stVersions :: !(MutablePrimArray RealWorld Version)
, stEffects :: !(SmallMutableArray RealWorld AnyEffect)
, stRelinkers :: !(SmallMutableArray RealWorld AnyRelinker)
}
@ -209,12 +250,12 @@ restoreEnv dest src = do
-- | Get the current size of the environment.
sizeEnv :: Env es -> IO Int
sizeEnv (Env offset refs _) = do
pure $ (sizeofPrimArray refs - offset) `div` 2
pure $ sizeofPrimArray refs - offset
-- | Access the tail of the environment.
tailEnv :: Env (e : es) -> IO (Env es)
tailEnv (Env offset refs storage) = do
pure $ Env (offset + 2) refs storage
pure $ Env (offset + 1) refs storage
----------------------------------------
-- Extending and shrinking
@ -229,11 +270,10 @@ consEnv
-> IO (Env (e : es))
consEnv e f (Env offset refs0 storage) = do
let size = sizeofPrimArray refs0 - offset
mrefs <- newPrimArray (size + 2)
copyPrimArray mrefs 2 refs0 offset size
(ref, version) <- insertEffect storage e f
mrefs <- newPrimArray (size + 1)
copyPrimArray mrefs 1 refs0 offset size
ref <- insertEffect storage e f
writePrimArray mrefs 0 ref
writePrimArray mrefs 1 version
refs <- unsafeFreezePrimArray mrefs
pure $ Env 0 refs storage
{-# NOINLINE consEnv #-}
@ -264,10 +304,8 @@ replaceEnv e f (Env offset refs0 storage) = do
let size = sizeofPrimArray refs0 - offset
mrefs <- newPrimArray size
copyPrimArray mrefs 0 refs0 offset size
(ref, version) <- insertEffect storage e f
let i = 2 * reifyIndex @e @es
writePrimArray mrefs i ref
writePrimArray mrefs (i + 1) version
ref <- insertEffect storage e f
writePrimArray mrefs (reifyIndex @e @es) ref
refs <- unsafeFreezePrimArray mrefs
pure $ Env 0 refs storage
{-# NOINLINE replaceEnv #-}
@ -278,7 +316,7 @@ replaceEnv e f (Env offset refs0 storage) = do
-- usable.
unreplaceEnv :: forall e es. (HasCallStack, e :> es) => Env es -> IO ()
unreplaceEnv (Env offset refs storage) = do
deleteEffect storage $ indexPrimArray refs (offset + 2 * reifyIndex @e @es)
deleteEffect storage $ indexPrimArray refs (offset + reifyIndex @e @es)
{-# NOINLINE unreplaceEnv #-}
----------------------------------------
@ -287,11 +325,9 @@ unreplaceEnv (Env offset refs storage) = do
subsumeEnv :: forall e es. e :> es => Env es -> IO (Env (e : es))
subsumeEnv (Env offset refs0 storage) = do
let size = sizeofPrimArray refs0 - offset
mrefs <- newPrimArray (size + 2)
copyPrimArray mrefs 2 refs0 offset size
let ix = offset + 2 * reifyIndex @e @es
writePrimArray mrefs 0 $ indexPrimArray refs0 ix
writePrimArray mrefs 1 $ indexPrimArray refs0 (ix + 1)
mrefs <- newPrimArray (size + 1)
copyPrimArray mrefs 1 refs0 offset size
writePrimArray mrefs 0 $ indexPrimArray refs0 (offset + reifyIndex @e @es)
refs <- unsafeFreezePrimArray mrefs
pure $ Env 0 refs storage
{-# NOINLINE subsumeEnv #-}
@ -303,8 +339,8 @@ subsumeEnv (Env offset refs0 storage) = do
injectEnv :: forall xs es. Subset xs es => Env es -> IO (Env xs)
injectEnv (Env offset refs0 storage) = do
let xs = reifyIndices @xs @es
permSize = 2 * length xs
prefixSize = 2 * prefixLength @es
permSize = length xs
prefixSize = prefixLength @es
suffixSize = if subsetFullyKnown @xs @es
then 0
else sizeofPrimArray refs0 - offset - prefixSize
@ -313,10 +349,8 @@ injectEnv (Env offset refs0 storage) = do
let writePermRefs i = \case
[] -> pure ()
(e : es) -> do
let ix = offset + 2 * e
writePrimArray mrefs i $ indexPrimArray refs0 ix
writePrimArray mrefs (i + 1) $ indexPrimArray refs0 (ix + 1)
writePermRefs (i + 2) es
writePrimArray mrefs i $ indexPrimArray refs0 (offset + e)
writePermRefs (i + 1) es
writePermRefs 0 xs
refs <- unsafeFreezePrimArray mrefs
pure $ Env 0 refs storage
@ -373,9 +407,6 @@ getLocation
=> Env es
-> IO (Int, SmallMutableArray RealWorld AnyEffect)
getLocation (Env offset refs storage) = do
let i = offset + 2 * reifyIndex @e @es
ref = indexPrimArray refs i
version = indexPrimArray refs (i + 1)
Storage _ _ vs es _ <- readIORef' storage
storageVersion <- readPrimArray vs ref
-- If version of the reference is different than version in the storage, it
@ -388,13 +419,15 @@ getLocation (Env offset refs storage) = do
++ "of the scope of effects it captures, have a look at "
++ "UnliftingStrategy (SeqForkUnlift)."
pure (ref, es)
where
Ref ref version = indexPrimArray refs (offset + reifyIndex @e @es)
----------------------------------------
-- Internal helpers
-- | Create an empty storage.
emptyStorage :: HasCallStack => IO Storage
emptyStorage = Storage 0 (noVersion + 1)
emptyStorage = Storage 0 initialVersion
<$> newPrimArray 0
<*> newSmallArray 0 undefinedEffect
<*> newSmallArray 0 undefinedRelinker
@ -406,7 +439,7 @@ insertEffect
-> EffectRep (DispatchOf e) e
-- ^ The representation of the effect.
-> Relinker (EffectRep (DispatchOf e)) e
-> IO (Int, Int)
-> IO Ref
insertEffect storage e f = do
Storage size version vs0 es0 fs0 <- readIORef' storage
len0 <- getSizeofSmallMutableArray es0
@ -416,8 +449,8 @@ insertEffect storage e f = do
writePrimArray vs0 size version
writeSmallArray' es0 size (toAnyEffect e)
writeSmallArray' fs0 size (toAnyRelinker f)
writeIORef' storage $ Storage (size + 1) (version + 1) vs0 es0 fs0
pure (size, version)
writeIORef' storage $ Storage (size + 1) (bumpVersion version) vs0 es0 fs0
pure $ Ref size version
EQ -> do
let len = doubleCapacity len0
vs <- newPrimArray len
@ -429,20 +462,24 @@ insertEffect storage e f = do
writePrimArray vs size version
writeSmallArray' es size (toAnyEffect e)
writeSmallArray' fs size (toAnyRelinker f)
writeIORef' storage $ Storage (size + 1) (version + 1) vs es fs
pure (size, version)
writeIORef' storage $ Storage (size + 1) (bumpVersion version) vs es fs
pure $ Ref size version
-- | Given a reference to an effect from the top of the stack, delete it from
-- the storage.
deleteEffect :: HasCallStack => IORef' Storage -> Int -> IO ()
deleteEffect storage ref = do
Storage size version vs es fs <- readIORef' storage
deleteEffect :: HasCallStack => IORef' Storage -> Ref -> IO ()
deleteEffect storage (Ref ref version) = do
Storage size currentVersion vs es fs <- readIORef' storage
when (ref /= size - 1) $ do
error $ "ref (" ++ show ref ++ ") /= size - 1 (" ++ show (size - 1) ++ ")"
writePrimArray vs ref noVersion
storageVersion <- readPrimArray vs ref
when (version /= storageVersion) $ do
error $ "version (" ++ show version ++ ") /= storageVersion ("
++ show storageVersion ++ ")\n"
writePrimArray vs ref undefinedVersion
writeSmallArray es ref undefinedEffect
writeSmallArray fs ref undefinedRelinker
writeIORef' storage $ Storage (size - 1) version vs es fs
writeIORef' storage $ Storage (size - 1) currentVersion vs es fs
-- | Relink the environment to use the new storage.
relinkEnv :: IORef' Storage -> Env es -> IO (Env es)
@ -452,8 +489,14 @@ relinkEnv storage (Env offset refs _) = pure $ Env offset refs storage
doubleCapacity :: Int -> Int
doubleCapacity n = max 1 n * 2
noVersion :: Int
noVersion = 0
undefinedVersion :: Version
undefinedVersion = Version 0
initialVersion :: Version
initialVersion = Version 1
bumpVersion :: Version -> Version
bumpVersion (Version n) = Version (n + 1)
undefinedEffect :: HasCallStack => AnyEffect
undefinedEffect = toAnyEffect . errorWithoutStackTrace $ unlines

6
effectful-core/src/Effectful/Provider.hs
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@ -204,8 +204,8 @@ copyRef (Env hoffset hrefs hstorage) (Env offset refs0 storage) = do
when (hstorage /= storage) $ do
error "storages do not match"
let size = sizeofPrimArray refs0 - offset
mrefs <- newPrimArray (size + 2)
copyPrimArray mrefs 0 hrefs hoffset 2
copyPrimArray mrefs 2 refs0 offset size
mrefs <- newPrimArray (size + 1)
copyPrimArray mrefs 0 hrefs hoffset 1
copyPrimArray mrefs 1 refs0 offset size
refs <- unsafeFreezePrimArray mrefs
pure $ Env 0 refs storage

2
effectful-core/src/Effectful/Provider/List.hs
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@ -148,7 +148,7 @@ copyRefs (Env hoffset hrefs hstorage) (Env offset refs0 storage) = do
when (hstorage /= storage) $ do
error "storages do not match"
let size = sizeofPrimArray refs0 - offset
listSize = 2 * knownEffectsLength @list
listSize = knownEffectsLength @list
mrefs <- newPrimArray (size + listSize)
copyPrimArray mrefs 0 hrefs hoffset listSize
copyPrimArray mrefs listSize refs0 offset size

1
effectful-plugin/effectful-plugin.cabal
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@ -35,6 +35,7 @@ common language
DataKinds
DeriveFunctor
DeriveGeneric
DerivingStrategies
FlexibleContexts
FlexibleInstances
GADTs

1
effectful-th/effectful-th.cabal
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@ -35,6 +35,7 @@ common language
DataKinds
DeriveFunctor
DeriveGeneric
DerivingStrategies
FlexibleContexts
FlexibleInstances
GADTs

1
effectful/effectful.cabal
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@ -44,6 +44,7 @@ common language
DataKinds
DeriveFunctor
DeriveGeneric
DerivingStrategies
FlexibleContexts
FlexibleInstances
GADTs