@@ -1,53 +1,104 @@
1−{-# LANGUAGE CPP, ExistentialQuantification, GADTs, ScopedTypeVariables, TypeFamilies, FlexibleInstances, MultiParamTypeClasses, GeneralizedNewtypeDeriving, RankNTypes, BangPatterns, UndecidableInstances, EmptyDataDecls, RecursiveDo, RoleAnnotations, LambdaCase, TypeOperators #-}
2−module Reflex.Spider.Internal where
3−
4−import qualified Reflex.Class as R
5−import qualified Reflex.Host.Class as R
6−
7−import Data.IORef
8−import System.Mem.Weak
9−import Data.Foldable
10−import Data.Traversable
11−import Control.Monad hiding (mapM, mapM_, forM_, forM, sequence)
12−import Control.Monad.Identity hiding (mapM, mapM_, forM_, forM, sequence)
13−import Control.Monad.Reader hiding (mapM, mapM_, forM_, forM, sequence)
14−import GHC.Exts
15−import Control.Applicative -- Unconditionally import, because otherwise it breaks on GHC 7.10.1RC2
1+{-# LANGUAGE BangPatterns #-}
2+{-# LANGUAGE CPP #-}
3+{-# LANGUAGE ConstraintKinds #-}
4+{-# LANGUAGE EmptyDataDecls #-}
5+{-# LANGUAGE ExistentialQuantification #-}
6+{-# LANGUAGE FlexibleContexts #-}
7+{-# LANGUAGE FlexibleInstances #-}
8+{-# LANGUAGE FunctionalDependencies #-}
9+{-# LANGUAGE GADTs #-}
10+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
11+{-# LANGUAGE LambdaCase #-}
12+{-# LANGUAGE MagicHash #-}
13+{-# LANGUAGE MultiParamTypeClasses #-}
14+{-# LANGUAGE MultiWayIf #-}
15+{-# LANGUAGE RankNTypes #-}
16+{-# LANGUAGE RoleAnnotations #-}
17+{-# LANGUAGE ScopedTypeVariables #-}
18+{-# LANGUAGE TypeFamilies #-}
19+{-# LANGUAGE TypeOperators #-}
20+{-# LANGUAGE UndecidableInstances #-}
21+-- | This module is the implementation of the 'Spider' 'Reflex' engine. It uses
22+-- a graph traversal algorithm to propagate 'Event's and 'Behavior's.
23+module Reflex.Spider.Internal
24+ ( Spider
25+ , SpiderEnv (..)
26+ , Global
27+ , SpiderHost
28+ , runSpiderHost
29+ , newSpiderEnv
30+ , askSpiderEnv
31+ ) where
32+
33+import Control.Applicative
34+import Control.Concurrent
35+import Control.Exception
36+import Control.Monad hiding (forM, forM_, mapM, mapM_, sequence)
37+import Control.Monad.Exception
38+import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_, sequence)
39+import Control.Monad.Primitive
40+import Control.Monad.Reader hiding (forM, forM_, mapM, mapM_, sequence)
41+import Control.Monad.Ref
42+import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
43+import Data.Align
44+import Data.Coerce
1645import Data.Dependent.Map (DMap, DSum (..))
1746import qualified Data.Dependent.Map as DMap
47+import Data.Foldable hiding (concat, elem, sequence_)
48+import Data.Function
49+import Data.Functor.Compose
1850import Data.GADT.Compare
51+import Data.IntMap.Strict (IntMap)
52+import qualified Data.IntMap.Strict as IntMap
53+import Data.IORef
54+import Data.List hiding (foldl')
55+import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
56+import qualified Data.List.NonEmpty as NonEmpty
1957import Data.Maybe
20−import Data.IntMap (IntMap)
21−import qualified Data.IntMap as IntMap
22−import Control.Monad.Ref
23−import Control.Monad.Exception
24−import Data.Monoid ((<>))
25−import Data.Coerce
26−import Control.Exception
27−
58+import Data.Monoid (mempty, (<>))
59+import Data.Some (Some)
60+import qualified Data.Some as Some
61+import Data.These
62+import Data.Traversable
63+import Data.Tree (Forest, Tree (..), drawForest)
64+import Data.Word
65+import GHC.IORef (IORef (..))
66+import GHC.Stack
2867import System.IO.Unsafe
68+import System.Mem.Weak
2969import Unsafe.Coerce
30−import Control.Monad.Primitive
70+
71+import Data.WeakBag (WeakBag, WeakBagTicket)
72+import qualified Data.WeakBag as WeakBag
73+import qualified Reflex.Class as R
74+import qualified Reflex.Host.Class as R
3175
3276-- Note: must come last to silence warnings due to AMP on GHC < 7.10
33−import Prelude hiding (mapM, mapM_, any, sequence, concat)
77+import Prelude hiding (any, concat, mapM, mapM_, sequence)
78+
79+type SubscriberList a = WeakBag (Subscriber a)
80+type SubscriberListTicket a = WeakBagTicket (Subscriber a)
3481
3582debugPropagate :: Bool
3683
3784debugInvalidateHeight :: Bool
3885
86+debugInvalidate :: Bool
87+
3988#ifdef DEBUG
4089
4190#define DEBUG_NODEIDS
4291
4392debugPropagate = True
4493
45−debugInvalidateHeight = True
94+debugInvalidateHeight = False
95+
96+debugInvalidate = True
4697
4798class HasNodeId a where
4899 getNodeId :: a -> Int
49100
50−instance HasNodeId (Hold a) where
101+instance HasNodeId (Hold p a) where
51102 getNodeId = holdNodeId
52103
53104instance HasNodeId (PushSubscribed a b) where
@@ -68,17 +119,52 @@ instance HasNodeId (CoincidenceSubscribed a) where
68119instance HasNodeId (RootSubscribed a) where
69120 getNodeId = rootSubscribedNodeId
70121
122+instance HasNodeId (Pull a) where
123+ getNodeId = pullNodeId
124+
125+{-# INLINE showNodeId #-}
71126showNodeId :: HasNodeId a => a -> String
72127showNodeId = ("#"<>) . show . getNodeId
73128
129+showSubscriberType :: Subscriber a -> String
130+showSubscriberType = \case
131+ SubscriberPush _ _ -> "SubscriberPush"
132+ SubscriberMerge _ _ -> "SubscriberMerge"
133+ SubscriberFan _ -> "SubscriberFan"
134+ SubscriberMergeChange _ -> "SubscriberMergeChange"
135+ SubscriberHold _ -> "SubscriberHold"
136+ SubscriberHoldIdentity _ -> "SubscriberHoldIdentity"
137+ SubscriberSwitch _ -> "SubscriberSwitch"
138+ SubscriberCoincidenceOuter _ -> "SubscriberCoincidenceOuter"
139+ SubscriberCoincidenceInner _ -> "SubscriberCoincidenceInner"
140+ SubscriberHandle -> "SubscriberHandle"
141+
142+showEventType :: Event a -> String
143+showEventType = \case
144+ EventRoot _ _ -> "EventRoot"
145+ EventNever -> "EventNever"
146+ EventPush _ -> "EventPush"
147+ EventMerge _ -> "EventMerge"
148+ EventFan _ _ -> "EventFan"
149+ EventSwitch _ -> "EventSwitch"
150+ EventCoincidence _ -> "EventCoincidence"
151+ EventHold _ -> "EventHold"
152+ EventDyn _ -> "EventDyn"
153+ EventHoldIdentity _ -> "EventHoldIdentity"
154+ EventDynIdentity _ -> "EventDynIdentity"
155+
74156#else
75157
76158debugPropagate = False
77159
78160debugInvalidateHeight = False
79161
162+debugInvalidate = False
163+
164+-- This must be inline, or error messages will cause memory leaks due to retaining the node in question
165+{-# INLINE showNodeId #-}
80166showNodeId :: a -> String
81−showNodeId = const ""
167+showNodeId _ = ""
82168
83169#endif
84170
@@ -87,116 +173,189 @@ showNodeId = const ""
87173nextNodeIdRef :: IORef Int
88174nextNodeIdRef = unsafePerformIO $ newIORef 1
89175
176+newNodeId :: IO Int
177+newNodeId = atomicModifyIORef' nextNodeIdRef $ \n -> (succ n, n)
178+
90179{-# NOINLINE unsafeNodeId #-}
91180unsafeNodeId :: a -> Int
92181unsafeNodeId a = unsafePerformIO $ do
93182 touch a
94− atomicModifyIORef' nextNodeIdRef $ \n -> (succ n, n)
183+ newNodeId
95184#endif
96185
97186--TODO: Figure out why certain things are not 'representational', then make them representational so we can use coerce
98187--type role Hold representational
99−data Hold a
188+data Hold p a
100189 = Hold { holdValue :: !(IORef a)
101190 , holdInvalidators :: !(IORef [Weak Invalidator])
102− -- We need to use 'Any' for the next two things, because otherwise Hold inherits a nominal role for its 'a' parameter, and we want to be able to use 'coerce'
103− , holdSubscriber :: !(IORef Any) -- Keeps its subscription alive; for some reason, a regular (or strict) reference to the Subscriber itself wasn't working, so had to use an IORef
104− , holdParent :: !(IORef Any) -- Keeps its parent alive (will be undefined until the hold is initialized --TODO: Probably shouldn't be an IORef
191+ , holdParent :: !(IORef (Either (Event (p a)) (EventSubscription (p a)))) -- Keeps its parent alive (will be undefined until the hold is initialized) --TODO: Probably shouldn't be an IORef
105192#ifdef DEBUG_NODEIDS
106193 , holdNodeId :: Int
107194#endif
108195 }
109196
110−data EventEnv
111− = EventEnv { eventEnvAssignments :: !(IORef [SomeAssignment])
112− , eventEnvHoldInits :: !(IORef [SomeHoldInit])
113− , eventEnvClears :: !(IORef [SomeMaybeIORef])
114− , eventEnvRootClears :: !(IORef [SomeDMapIORef])
115− , eventEnvCurrentHeight :: !(IORef Int)
116− , eventEnvCoincidenceInfos :: !(IORef [SomeCoincidenceInfo])
197+data EventEnv x
198+ = EventEnv { eventEnvSpiderEnv :: !(SpiderEnv x)
199+ , eventEnvAssignments :: !(IORef [SomeAssignment]) -- Needed for Subscribe
200+ , eventEnvHoldInits :: !(IORef [SomeHoldInit]) -- Needed for Subscribe
201+ , eventEnvMergeUpdates :: !(IORef [SomeMergeUpdate])
202+ , eventEnvMergeInits :: !(IORef [SomeMergeInit]) -- Needed for Subscribe
203+ , eventEnvClears :: !(IORef [SomeClear]) -- Needed for Subscribe
204+ , eventEnvRootClears :: !(IORef [SomeRootClear])
205+ , eventEnvCurrentHeight :: !(IORef Height) -- Needed for Subscribe
206+ , eventEnvResetCoincidences :: !(IORef [SomeResetCoincidence]) -- Needed for Subscribe
117207 , eventEnvDelayedMerges :: !(IORef (IntMap [DelayedMerge]))
118208 }
119209
120−runEventM :: EventM a -> EventEnv -> IO a
210+{-# INLINE runEventM #-}
211+runEventM :: EventM x a -> EventEnv x -> IO a
121212runEventM = runReaderT . unEventM
122213
123−askToAssignRef :: EventM (IORef [SomeAssignment])
124−askToAssignRef = EventM $ asks eventEnvAssignments
125−
126−askHoldInitRef :: EventM (IORef [SomeHoldInit])
127−askHoldInitRef = EventM $ asks eventEnvHoldInits
128−
129−getCurrentHeight :: EventM Int
130−getCurrentHeight = EventM $ do
131− heightRef <- asks eventEnvCurrentHeight
132− liftIO $ readIORef heightRef
133−
134−putCurrentHeight :: Int -> EventM ()
214+class MonadIO m => Defer a m where
215+ getDeferralQueue :: m (IORef [a])
216+
217+{-# INLINE defer #-}
218+defer :: Defer a m => a -> m ()
219+defer a = do
220+ q <- getDeferralQueue
221+ liftIO $ modifyIORef' q (a:)
222+
223+instance Defer SomeAssignment (EventM x) where
224+ {-# INLINE getDeferralQueue #-}
225+ getDeferralQueue = EventM $ asks eventEnvAssignments
226+
227+instance Defer SomeHoldInit (EventM x) where
228+ {-# INLINE getDeferralQueue #-}
229+ getDeferralQueue = EventM $ asks eventEnvHoldInits
230+
231+instance Defer SomeHoldInit BehaviorM where
232+ {-# INLINE getDeferralQueue #-}
233+ getDeferralQueue = BehaviorM $ asks snd
234+
235+instance Defer SomeMergeUpdate (EventM x) where
236+ {-# INLINE getDeferralQueue #-}
237+ getDeferralQueue = EventM $ asks eventEnvMergeUpdates
238+
239+instance Defer SomeMergeInit (EventM x) where
240+ {-# INLINE getDeferralQueue #-}
241+ getDeferralQueue = EventM $ asks eventEnvMergeInits
242+
243+class HasCurrentHeight m where
244+ getCurrentHeight :: m Height
245+ scheduleMerge :: Height -> MergeSubscribed a -> m ()
246+
247+instance HasCurrentHeight (EventM x) where
248+ {-# INLINE getCurrentHeight #-}
249+ getCurrentHeight = EventM $ do
250+ heightRef <- asks eventEnvCurrentHeight
251+ liftIO $ readIORef heightRef
252+ {-# INLINE scheduleMerge #-}
253+ scheduleMerge height subscribed = EventM $ do
254+ delayedRef <- asks eventEnvDelayedMerges
255+ liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) (unHeight height) [DelayedMerge subscribed]
256+
257+class HasSpiderEnv x m | m -> x where
258+ -- | Retrieve the current SpiderEnv
259+ askSpiderEnv :: m (SpiderEnv x)
260+
261+instance HasSpiderEnv x (EventM x) where
262+ {-# INLINE askSpiderEnv #-}
263+ askSpiderEnv = EventM $ asks eventEnvSpiderEnv
264+
265+instance HasSpiderEnv x (SpiderHost x) where
266+ {-# INLINE askSpiderEnv #-}
267+ askSpiderEnv = SpiderHost ask
268+
269+putCurrentHeight :: Height -> EventM x ()
135270putCurrentHeight h = EventM $ do
136271 heightRef <- asks eventEnvCurrentHeight
137− liftIO $ writeIORef heightRef h
272+ liftIO $ writeIORef heightRef $! h
138273
139−scheduleClear :: IORef (Maybe a) -> EventM ()
140−scheduleClear r = EventM $ do
141− clears <- asks eventEnvClears
142− liftIO $ modifyIORef' clears (SomeMaybeIORef r :)
274+instance Defer SomeClear (EventM x) where
275+ {-# INLINE getDeferralQueue #-}
276+ getDeferralQueue = EventM $ asks eventEnvClears
143277
144−scheduleRootClear :: IORef (DMap k Identity) -> EventM ()
145−scheduleRootClear r = EventM $ do
146− clears <- asks eventEnvRootClears
147− liftIO $ modifyIORef' clears (SomeDMapIORef r :)
278+{-# INLINE scheduleClear #-}
279+scheduleClear :: Defer SomeClear m => IORef (Maybe a) -> m ()
280+scheduleClear r = defer $ SomeClear r
148281
149−scheduleMerge :: Int -> MergeSubscribed a -> EventM ()
150−scheduleMerge height subscribed = EventM $ do
151− delayedRef <- asks eventEnvDelayedMerges
152− liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) height [DelayedMerge subscribed]
282+instance Defer SomeRootClear (EventM x) where
283+ {-# INLINE getDeferralQueue #-}
284+ getDeferralQueue = EventM $ asks eventEnvRootClears
153285
154−emitCoincidenceInfo :: SomeCoincidenceInfo -> EventM ()
155−emitCoincidenceInfo sci = EventM $ do
156− ciRef <- asks eventEnvCoincidenceInfos
157− liftIO $ modifyIORef' ciRef (sci:)
286+{-# INLINE scheduleRootClear #-}
287+scheduleRootClear :: Defer SomeRootClear m => IORef (DMap k Identity) -> m ()
288+scheduleRootClear r = defer $ SomeRootClear r
289+
290+instance Defer SomeResetCoincidence (EventM x) where
291+ {-# INLINE getDeferralQueue #-}
292+ getDeferralQueue = EventM $ asks eventEnvResetCoincidences
158293
159294-- Note: hold cannot examine its event until after the phase is over
160−hold :: a -> Event a -> EventM (Behavior a)
295+{-# SPECIALIZE hold :: R.Patch p => a -> Event (p a) -> EventM x (Hold p a) #-}
296+{-# SPECIALIZE hold :: R.Patch p => a -> Event (p a) -> ComputeM (Hold p a) #-}
297+hold :: (R.Patch p, Defer SomeHoldInit m) => a -> Event (p a) -> m (Hold p a)
161298hold v0 e = do
162− holdInitRef <- askHoldInitRef
163− liftIO $ do
164− valRef <- newIORef v0
165− invsRef <- newIORef []
166− parentRef <- newIORef $ error "hold not yet initialized (parent)"
167− subscriberRef <- newIORef $ error "hold not yet initialized (subscriber)"
168− let h = Hold
169− { holdValue = valRef
170− , holdInvalidators = invsRef
171− , holdSubscriber = subscriberRef
172− , holdParent = parentRef
299+ valRef <- liftIO $ newIORef v0
300+ invsRef <- liftIO $ newIORef []
301+ parentRef <- liftIO $ newIORef $ Left e
173302#ifdef DEBUG_NODEIDS
174− , holdNodeId = unsafeNodeId (v0, e)
303+ nodeId <- liftIO newNodeId
175304#endif
176− }
177− s <- newSubscriberHold h
178− writeIORef subscriberRef $ unsafeCoerce s
179− modifyIORef' holdInitRef (SomeHoldInit e h :)
180− return $ BehaviorHold h
181−
182−subscribeHold :: Event a -> Hold a -> EventM ()
183−subscribeHold e h = do
184− toAssignRef <- askToAssignRef
185− !s <- liftIO $ liftM unsafeCoerce $ readIORef $ holdSubscriber h -- This must be performed strictly so that the weak pointer points at the actual item
186− ws <- liftIO $ mkWeakPtrWithDebug s "holdSubscriber"
187− subd <- subscribe e $ WeakSubscriberSimple ws
188− liftIO $ writeIORef (holdParent h) $ unsafeCoerce subd
189− occ <- liftIO $ getEventSubscribedOcc subd
190− case occ of
191− Nothing -> return ()
192− Just o -> liftIO $ modifyIORef' toAssignRef (SomeAssignment h o :)
305+ let h = Hold
306+ { holdValue = valRef
307+ , holdInvalidators = invsRef
308+ , holdParent = parentRef
309+#ifdef DEBUG_NODEIDS
310+ , holdNodeId = nodeId
311+#endif
312+ }
313+ defer $ SomeHoldInit h
314+ return h
315+
316+{-# INLINE getHoldEventSubscription #-}
317+getHoldEventSubscription :: forall m p a x. (Defer SomeAssignment m, Defer SomeHoldInit m, Defer SomeClear m, R.Patch p, HasCurrentHeight m, Defer SomeMergeInit m, Defer SomeResetCoincidence m, HasSpiderEnv x m) => Hold p a -> m (EventSubscription (p a))
318+getHoldEventSubscription h = do
319+ ep <- liftIO $ readIORef $ holdParent h
320+ case ep of
321+ Right subd -> return subd
322+ Left e -> do
323+ subscriptionRef <- liftIO $ newIORef $ error "getHoldEventSubscription: subdRef uninitialized"
324+ subscription@(EventSubscription _ subd) <- subscribe e =<< liftIO (newSubscriberHold h)
325+ liftIO $ writeIORef subscriptionRef $! subscription
326+ occ <- liftIO $ readEventSubscribed subd
327+ case occ of
328+ Nothing -> return ()
329+ Just o -> do
330+ old <- liftIO $ readIORef $ holdValue h
331+ case R.apply o old of
332+ Nothing -> return ()
333+ Just new -> do
334+ -- Need to evaluate these so that we don't retain the Hold itself
335+ v <- liftIO $ evaluate $ holdValue h
336+ i <- liftIO $ evaluate $ holdInvalidators h
337+ defer $ SomeAssignment v i new
338+ liftIO $ writeIORef (holdParent h) $ Right subscription
339+ return subscription
340+
341+type BehaviorEnv = (Maybe (Weak Invalidator, IORef [SomeBehaviorSubscribed]), IORef [SomeHoldInit])
193342
194343--type role BehaviorM representational
195344-- BehaviorM can sample behaviors
196−newtype BehaviorM a = BehaviorM { unBehaviorM :: ReaderT (Maybe (Weak Invalidator, IORef [SomeBehaviorSubscribed])) IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
345+newtype BehaviorM a = BehaviorM { unBehaviorM :: ReaderT BehaviorEnv IO a } deriving (Functor, Applicative, MonadIO, MonadFix)
346+
347+instance Monad BehaviorM where
348+ {-# INLINE (>>=) #-}
349+ BehaviorM x >>= f = BehaviorM $ x >>= unBehaviorM . f
350+ {-# INLINE (>>) #-}
351+ BehaviorM x >> BehaviorM y = BehaviorM $ x >> y
352+ {-# INLINE return #-}
353+ return x = BehaviorM $ return x
354+ {-# INLINE fail #-}
355+ fail s = BehaviorM $ fail s
197356
198357data BehaviorSubscribed a
199− = BehaviorSubscribedHold (Hold a)
358+ = forall p. BehaviorSubscribedHold (Hold p a)
200359 | BehaviorSubscribedPull (PullSubscribed a)
201360
202361data SomeBehaviorSubscribed = forall a. SomeBehaviorSubscribed (BehaviorSubscribed a)
@@ -213,16 +372,26 @@ data PullSubscribed a
213372data Pull a
214373 = Pull { pullValue :: !(IORef (Maybe (PullSubscribed a)))
215374 , pullCompute :: !(BehaviorM a)
375+#ifdef DEBUG_NODEIDS
376+ , pullNodeId :: Int
377+#endif
216378 }
217379
218380data Invalidator
219381 = forall a. InvalidatorPull (Pull a)
220382 | forall a. InvalidatorSwitch (SwitchSubscribed a)
221383
222−data RootSubscribed a
223− = RootSubscribed { rootSubscribedSubscribers :: !(IORef [WeakSubscriber a])
224− , rootSubscribedOccurrence :: !(IO (Maybe a)) -- Lookup from rootOccurrence
225− }
384+data RootSubscribed a = forall k. GCompare k => RootSubscribed
385+ { rootSubscribedKey :: !(k a)
386+ , rootSubscribedCachedSubscribed :: !(IORef (DMap k RootSubscribed)) -- From the original Root
387+ , rootSubscribedSubscribers :: !(SubscriberList a)
388+ , rootSubscribedOccurrence :: !(IO (Maybe a)) -- Lookup from rootOccurrence
389+ , rootSubscribedUninit :: IO ()
390+ , rootSubscribedWeakSelf :: !(IORef (Weak (RootSubscribed a))) --TODO: Can we make this a lazy non-IORef and then force it manually to avoid an indirection each time we use it?
391+#ifdef DEBUG_NODEIDS
392+ , rootSubscribedNodeId :: Int
393+#endif
394+ }
226395
227396data Root (k :: * -> *)
228397 = Root { rootOccurrence :: !(IORef (DMap k Identity)) -- The currently-firing occurrence of this event
@@ -230,35 +399,102 @@ data Root (k :: * -> *)
230399 , rootInit :: !(forall a. k a -> RootTrigger a -> IO (IO ()))
231400 }
232401
233−data SomeHoldInit = forall a. SomeHoldInit (Event a) (Hold a)
402+data SomeHoldInit = forall p a. R.Patch p => SomeHoldInit !(Hold p a)
403+
404+data SomeMergeUpdate = forall k. GCompare k => SomeMergeUpdate (R.PatchDMap (DMap k Event)) (MergeSubscribed k)
405+
406+data SomeMergeInit = forall k. GCompare k => SomeMergeInit !(MergeSubscribed k) !(Event (R.PatchDMap (DMap k Event)))
407+
408+data SomeEventSubscription = forall a. SomeEventSubscription (EventSubscription a)
234409
235410-- EventM can do everything BehaviorM can, plus create holds
236−newtype EventM a = EventM { unEventM :: ReaderT EventEnv IO a } deriving (Functor, Applicative, Monad, MonadFix, MonadIO, MonadException, MonadAsyncException) -- The environment should be Nothing if we are not in a frame, and Just if we are - in which case it is a list of assignments to be done after the frame is over
411+newtype EventM x a = EventM { unEventM :: ReaderT (EventEnv x) IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException) -- The environment should be Nothing if we are not in a frame, and Just if we are - in which case it is a list of assignments to be done after the frame is over
237412
238413data PushSubscribed a b
239− = PushSubscribed { pushSubscribedOccurrence :: !(IORef (Maybe b)) -- If the current height is less than our height, this should always be Nothing; during our height, this will get filled in at some point, always before our children are notified; after our height, this will be filled in with the correct value (Nothing if we are not firing, Just if we are)
240− , pushSubscribedHeight :: !(IORef Int)
241− , pushSubscribedSubscribers :: !(IORef [WeakSubscriber b])
242− , pushSubscribedSelf :: !(Subscriber a) -- Hold this in memory to ensure our WeakReferences don't die
243− , pushSubscribedParent :: !(EventSubscribed a)
414+ = PushSubscribed { pushSubscribedCachedSubscribed :: !(IORef (Maybe (PushSubscribed a b)))
415+ , pushSubscribedOccurrence :: !(IORef (Maybe b)) -- If the current height is less than our height, this should always be Nothing; during our height, this will get filled in at some point, always before our children are notified; after our height, this will be filled in with the correct value (Nothing if we are not firing, Just if we are)
416+ , pushSubscribedHeight :: !(IORef Height)
417+ , pushSubscribedSubscribers :: !(SubscriberList b)
418+ , pushSubscribedSelf :: !(Subscriber a) -- Hold this in memory to ensure our WeakReferences don't die --TODO: Probably unneeded now
419+ , pushSubscribedWeakSelf :: !(IORef (Weak (PushSubscribed a b)))
420+ , pushSubscribedParent :: !(EventSubscription a)
244421#ifdef DEBUG_NODEIDS
245422 , pushSubscribedNodeId :: Int
246423#endif
247424 }
248425
426+newtype ComputeM a = ComputeM (ReaderT (IORef [SomeHoldInit]) IO a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
427+
428+instance Defer SomeHoldInit ComputeM where
429+ getDeferralQueue = ComputeM ask
430+
431+{-# SPECIALIZE runComputeM :: ComputeM a -> EventM x a #-}
432+runComputeM :: Defer SomeHoldInit m => ComputeM a -> m a
433+runComputeM (ComputeM a) = liftIO . runReaderT a =<< getDeferralQueue
434+
249435data Push a b
250− = Push { pushCompute :: !(a -> EventM (Maybe b)) -- Compute the current firing value; assumes that its parent has been computed
436+ = Push { pushCompute :: !(a -> ComputeM (Maybe b)) -- Compute the current firing value; assumes that its parent has been computed --TODO: This only uses Defer SomeHoldInit EventM; perhaps only the hold init queue should be passed in (also, perhaps those hold inits can be accelerated - can there be a loop we would need to worry about?)
251437 , pushParent :: !(Event a)
252438 , pushSubscribed :: !(IORef (Maybe (PushSubscribed a b))) --TODO: Can we replace this with an unsafePerformIO thunk?
253439 }
254440
441+data MergeSubscribedParent k a = MergeSubscribedParent !(EventSubscription a) !(Subscriber a)
442+
443+mergeSubscribedParentSubscription :: MergeSubscribedParent k a -> EventSubscription a
444+mergeSubscribedParentSubscription (MergeSubscribedParent es _) = es
445+
446+data HeightBag = HeightBag
447+ { _heightBag_size :: {-# UNPACK #-} !Int
448+ , _heightBag_contents :: !(IntMap Word) -- Number of excess in each bucket
449+ }
450+ deriving (Show, Read, Eq, Ord)
451+
452+heightBagEmpty :: HeightBag
453+heightBagEmpty = heightBagVerify $ HeightBag 0 IntMap.empty
454+
455+heightBagSize :: HeightBag -> Int
456+heightBagSize = _heightBag_size
457+
458+heightBagFromList :: [Height] -> HeightBag
459+heightBagFromList heights = heightBagVerify $ foldl' (flip heightBagAdd) heightBagEmpty heights
460+
461+heightBagAdd :: Height -> HeightBag -> HeightBag
462+heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
463+
464+heightBagRemove :: Height -> HeightBag -> HeightBag
465+heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.lookup h c of
466+ Nothing -> error $ "heightBagRemove: Height " <> show h <> " not present in bag " <> show b
467+ Just old -> HeightBag (pred s) $ case old of
468+ 0 -> IntMap.delete h c
469+ _ -> IntMap.insert h (pred old) c
470+
471+heightBagMax :: HeightBag -> Height
472+heightBagMax (HeightBag _ c) = case IntMap.maxViewWithKey c of
473+ Just ((h, _), _) -> Height h
474+ Nothing -> zeroHeight
475+
476+heightBagVerify :: HeightBag -> HeightBag
477+#ifdef DEBUG
478+heightBagVerify b@(HeightBag s c) = if
479+ | s /= IntMap.size c + fromIntegral (sum (IntMap.elems c))
480+ -> error $ "heightBagVerify: size doesn't match: " <> show b
481+ | unHeight invalidHeight `IntMap.member` c
482+ -> error $ "heightBagVerify: contains invalid height: " <> show b
483+ | otherwise -> b
484+#else
485+heightBagVerify = id
486+#endif
487+
255488data MergeSubscribed k
256− = MergeSubscribed { mergeSubscribedOccurrence :: !(IORef (Maybe (DMap k Identity)))
489+ = MergeSubscribed { mergeSubscribedCachedSubscribed :: !(IORef (Maybe (MergeSubscribed k))) -- From the original merge
490+ , mergeSubscribedOccurrence :: !(IORef (Maybe (DMap k Identity)))
257491 , mergeSubscribedAccum :: !(IORef (DMap k Identity)) -- This will accumulate occurrences until our height is reached, at which point it will be transferred to mergeSubscribedOccurrence
258− , mergeSubscribedHeight :: !(IORef Int)
259− , mergeSubscribedSubscribers :: !(IORef [WeakSubscriber (DMap k Identity)])
260− , mergeSubscribedSelf :: !Any -- Hold all our Subscribers in memory
261− , mergeSubscribedParents :: !(DMap k EventSubscribed)
492+ , mergeSubscribedHeight :: !(IORef Height)
493+ , mergeSubscribedHeightBag :: !(IORef HeightBag)
494+ , mergeSubscribedSubscribers :: !(SubscriberList (DMap k Identity))
495+ , mergeSubscribedChange :: !(IORef (Subscriber (R.PatchDMap (DMap k Event)), EventSubscribed (R.PatchDMap (DMap k Event))))
496+ , mergeSubscribedParents :: !(IORef (DMap k (MergeSubscribedParent k)))
497+ , mergeSubscribedWeakSelf :: !(IORef (Weak (MergeSubscribed k)))
262498#ifdef DEBUG_NODEIDS
263499 , mergeSubscribedNodeId :: Int
264500#endif
@@ -266,28 +502,20 @@ data MergeSubscribed k
266502
267503--TODO: DMap sucks; we should really write something better (with a functor for the value as well as the key)
268504data Merge k
269− = Merge { mergeParents :: !(DMap k Event)
270− , mergeSubscribed :: !(IORef (Maybe (MergeSubscribed k))) --TODO: Can we replace this with an unsafePerformIO thunk?
505+ = Merge { mergeParents :: !(Dynamic R.PatchDMap (DMap k Event))
506+ , mergeSubscribed :: !(IORef (Maybe (MergeSubscribed k)))
271507 }
272508
273−data FanSubscriberKey k a where
274− FanSubscriberKey :: k a -> FanSubscriberKey k [WeakSubscriber a]
275−
276−instance GEq k => GEq (FanSubscriberKey k) where
277− geq (FanSubscriberKey a) (FanSubscriberKey b) = case geq a b of
278− Nothing -> Nothing
279− Just Refl -> Just Refl
280−
281−instance GCompare k => GCompare (FanSubscriberKey k) where
282− gcompare (FanSubscriberKey a) (FanSubscriberKey b) = case gcompare a b of
283− GLT -> GLT
284− GEQ -> GEQ
285− GGT -> GGT
509+data FanSubscribedChildren k a = FanSubscribedChildren
510+ { _fanSubscribedChildren_list :: !(SubscriberList a)
511+ , _fanSubscribedChildren_self :: {-# NOUNPACK #-} !(k a, FanSubscribed k)
512+ , _fanSubscribedChildren_weakSelf :: !(IORef (Weak (k a, FanSubscribed k)))
513+ }
286514
287515data FanSubscribed k
288− = FanSubscribed { fanSubscribedSubscribers :: !(IORef (DMap (FanSubscriberKey k) Identity))
289− , fanSubscribedParent :: !(EventSubscribed (DMap k Identity))
290− , fanSubscribedSelf :: {-# NOUNPACK #-} (Subscriber (DMap k Identity))
516+ = FanSubscribed { fanSubscribedCachedSubscribed :: !(IORef (Maybe (FanSubscribed k)))
517+ , fanSubscribedSubscribers :: !(IORef (DMap k (FanSubscribedChildren k))) -- This DMap should never be empty
518+ , fanSubscribedParent :: !(EventSubscription (DMap k Identity))
291519#ifdef DEBUG_NODEIDS
292520 , fanSubscribedNodeId :: Int
293521#endif
@@ -299,16 +527,16 @@ data Fan k
299527 }
300528
301529data SwitchSubscribed a
302− = SwitchSubscribed { switchSubscribedOccurrence :: !(IORef (Maybe a))
303− , switchSubscribedHeight :: !(IORef Int)
304− , switchSubscribedSubscribers :: !(IORef [WeakSubscriber a])
305− , switchSubscribedSelf :: {-# NOUNPACK #-} (Subscriber a)
306− , switchSubscribedSelfWeak :: !(IORef (Weak (Subscriber a)))
307− , switchSubscribedOwnInvalidator :: {-# NOUNPACK #-} Invalidator
530+ = SwitchSubscribed { switchSubscribedCachedSubscribed :: !(IORef (Maybe (SwitchSubscribed a)))
531+ , switchSubscribedOccurrence :: !(IORef (Maybe a))
532+ , switchSubscribedHeight :: !(IORef Height)
533+ , switchSubscribedSubscribers :: !(SubscriberList a)
534+ , switchSubscribedOwnInvalidator :: {-# NOUNPACK #-} !Invalidator
308535 , switchSubscribedOwnWeakInvalidator :: !(IORef (Weak Invalidator))
309536 , switchSubscribedBehaviorParents :: !(IORef [SomeBehaviorSubscribed])
310537 , switchSubscribedParent :: !(Behavior (Event a))
311− , switchSubscribedCurrentParent :: !(IORef (EventSubscribed a))
538+ , switchSubscribedCurrentParent :: !(IORef (EventSubscription a))
539+ , switchSubscribedWeakSelf :: !(IORef (Weak (SwitchSubscribed a)))
312540#ifdef DEBUG_NODEIDS
313541 , switchSubscribedNodeId :: Int
314542#endif
@@ -319,13 +547,16 @@ data Switch a
319547 , switchSubscribed :: !(IORef (Maybe (SwitchSubscribed a)))
320548 }
321549
550+{-# ANN CoincidenceSubscribed "HLint: ignore Redundant bracket" #-}
322551data CoincidenceSubscribed a
323− = CoincidenceSubscribed { coincidenceSubscribedOccurrence :: !(IORef (Maybe a))
324− , coincidenceSubscribedSubscribers :: !(IORef [WeakSubscriber a])
325− , coincidenceSubscribedHeight :: !(IORef Int)
552+ = CoincidenceSubscribed { coincidenceSubscribedCachedSubscribed :: !(IORef (Maybe (CoincidenceSubscribed a)))
553+ , coincidenceSubscribedOccurrence :: !(IORef (Maybe a))
554+ , coincidenceSubscribedSubscribers :: !(SubscriberList a)
555+ , coincidenceSubscribedHeight :: !(IORef Height)
326556 , coincidenceSubscribedOuter :: {-# NOUNPACK #-} (Subscriber (Event a))
327− , coincidenceSubscribedOuterParent :: !(EventSubscribed (Event a))
557+ , coincidenceSubscribedOuterParent :: !(EventSubscription (Event a))
328558 , coincidenceSubscribedInnerParent :: !(IORef (Maybe (EventSubscribed a)))
559+ , coincidenceSubscribedWeakSelf :: !(IORef (Weak (CoincidenceSubscribed a)))
329560#ifdef DEBUG_NODEIDS
330561 , coincidenceSubscribedNodeId :: Int
331562#endif
@@ -336,41 +567,17 @@ data Coincidence a
336567 , coincidenceSubscribed :: !(IORef (Maybe (CoincidenceSubscribed a)))
337568 }
338569
339−data Box a = Box { unBox :: a }
340−
341−--type WeakSubscriber a = Weak (Subscriber a)
342−data WeakSubscriber a
343− = forall k. GCompare k => WeakSubscriberMerge !(k a) !(Weak (Box (MergeSubscribed k))) --TODO: Can we inline the GCompare?
344− | WeakSubscriberSimple !(Weak (Subscriber a))
345−
346−showWeakSubscriberType :: WeakSubscriber a -> String
347−showWeakSubscriberType = \case
348− WeakSubscriberMerge _ _ -> "WeakSubscriberMerge"
349− WeakSubscriberSimple _ -> "WeakSubscriberSimple"
350−
351−deRefWeakSubscriber :: WeakSubscriber a -> IO (Maybe (Subscriber a))
352−deRefWeakSubscriber ws = case ws of
353− WeakSubscriberSimple w -> deRefWeak w
354− WeakSubscriberMerge k w -> liftM (fmap $ SubscriberMerge k . unBox) $ deRefWeak w
355−
356570data Subscriber a
357− = forall b. SubscriberPush !(a -> EventM (Maybe b)) (PushSubscribed a b)
571+ = forall b. SubscriberPush (a -> ComputeM (Maybe b)) (PushSubscribed a b) --TODO: Why does this have the pushCompute in it?
358572 | forall k. GCompare k => SubscriberMerge !(k a) (MergeSubscribed k) --TODO: Can we inline the GCompare?
573+ | forall k. (a ~ R.PatchDMap (DMap k Event), GCompare k) => SubscriberMergeChange (MergeSubscribed k)
359574 | forall k. (GCompare k, a ~ DMap k Identity) => SubscriberFan (FanSubscribed k)
360− | SubscriberHold !(Hold a)
575+ | forall p b. (a ~ p b, R.Patch p) => SubscriberHold !(Hold p b)
576+ | forall b. (a ~ Identity b) => SubscriberHoldIdentity !(Hold Identity b)
361577 | SubscriberSwitch (SwitchSubscribed a)
362578 | forall b. a ~ Event b => SubscriberCoincidenceOuter (CoincidenceSubscribed b)
363579 | SubscriberCoincidenceInner (CoincidenceSubscribed a)
364−
365−showSubscriberType :: Subscriber a -> String
366−showSubscriberType = \case
367− SubscriberPush _ _ -> "SubscriberPush"
368− SubscriberMerge _ _ -> "SubscriberMerge"
369− SubscriberFan _ -> "SubscriberFan"
370− SubscriberHold _ -> "SubscriberHold"
371− SubscriberSwitch _ -> "SubscriberSwitch"
372− SubscriberCoincidenceOuter _ -> "SubscriberCoincidenceOuter"
373− SubscriberCoincidenceInner _ -> "SubscriberCoincidenceInner"
580+ | SubscriberHandle
374581
375582data Event a
376583 = forall k. GCompare k => EventRoot !(k a) !(Root k)
@@ -380,16 +587,15 @@ data Event a
380587 | forall k. GCompare k => EventFan !(k a) !(Fan k)
381588 | EventSwitch !(Switch a)
382589 | EventCoincidence !(Coincidence a)
383−
384−showEventType :: Event a -> String
385−showEventType = \case
386− EventRoot _ _ -> "EventRoot"
387− EventNever -> "EventNever"
388− EventPush _ -> "EventPush"
389− EventMerge _ -> "EventMerge"
390− EventFan _ _ -> "EventFan"
391− EventSwitch _ -> "EventSwitch"
392− EventCoincidence _ -> "EventCoincidence"
590+ | forall p b. (a ~ p b, R.Patch p) => EventHold !(Hold p b)
591+ | forall p b. (a ~ p b, R.Patch p) => EventDyn !(Dyn p b)
592+ | forall b. (a ~ Identity b) => EventHoldIdentity !(Hold Identity b)
593+ | forall b. (a ~ Identity b) => EventDynIdentity !(Dyn Identity b)
594+
595+data EventSubscription a = EventSubscription
596+ { _eventSubscription_ticket :: !(Maybe (SubscriberListTicket a))
597+ , _eventSubscription_subscribed :: !(EventSubscribed a)
598+ }
393599
394600data EventSubscribed a
395601 = EventSubscribedRoot {-# NOUNPACK #-} (RootSubscribed a)
@@ -400,6 +606,9 @@ data EventSubscribed a
400606 | EventSubscribedSwitch !(SwitchSubscribed a)
401607 | EventSubscribedCoincidence !(CoincidenceSubscribed a)
402608
609+unsubscribe :: EventSubscription a -> IO ()
610+unsubscribe (EventSubscription msln _) = forM_ msln $ \sln -> WeakBag.remove sln
611+
403612-- These function are constructor functions that are marked NOINLINE so they are
404613-- opaque to GHC. If we do not do this, then GHC will sometimes fuse the constructor away
405614-- so any weak references that are attached to the constructors will have their
@@ -409,22 +618,30 @@ data EventSubscribed a
409618-- The result is also evaluated to WHNF, since forcing a thunk invalidates
410619-- the weak pointer to it in some cases.
411620
412−{-# NOINLINE newRootSubscribed #-}
413−newRootSubscribed :: IO (Maybe a) -> IORef [WeakSubscriber a] -> IO (RootSubscribed a)
414−newRootSubscribed occ subs =
415− return $! RootSubscribed
416− { rootSubscribedOccurrence = occ
417− , rootSubscribedSubscribers = subs
418− }
419−
621+--TODO: I think all of these noinlines are now unnecessary
420622{-# NOINLINE newSubscriberPush #-}
421−newSubscriberPush :: (a -> EventM (Maybe b)) -> PushSubscribed a b -> IO (Subscriber a)
623+newSubscriberPush :: (a -> ComputeM (Maybe b)) -> PushSubscribed a b -> IO (Subscriber a)
422624newSubscriberPush compute subd = return $! SubscriberPush compute subd
423625
626+{-# RULES
627+ "newSubscriberHold/Identity" forall h. newSubscriberHold h = newSubscriberHoldIdentity h
628+ #-}
424629{-# NOINLINE newSubscriberHold #-}
425−newSubscriberHold :: Hold a -> IO (Subscriber a)
630+newSubscriberHold :: R.Patch p => Hold p a -> IO (Subscriber (p a))
426631newSubscriberHold h = return $! SubscriberHold h
427632
633+{-# NOINLINE newSubscriberHoldIdentity #-}
634+newSubscriberHoldIdentity :: Hold Identity a -> IO (Subscriber (Identity a))
635+newSubscriberHoldIdentity h = return $! SubscriberHoldIdentity h
636+
637+{-# NOINLINE newSubscriberMerge #-}
638+newSubscriberMerge :: GCompare k => k a -> MergeSubscribed k -> IO (Subscriber a)
639+newSubscriberMerge k subd = return $! SubscriberMerge k subd
640+
641+{-# NOINLINE newSubscriberMergeChange #-}
642+newSubscriberMergeChange :: GCompare k => MergeSubscribed k -> IO (Subscriber (R.PatchDMap (DMap k Event)))
643+newSubscriberMergeChange subd = return $! SubscriberMergeChange subd
644+
428645{-# NOINLINE newSubscriberFan #-}
429646newSubscriberFan :: GCompare k => FanSubscribed k -> IO (Subscriber (DMap k Identity))
430647newSubscriberFan subd = return $! SubscriberFan subd
@@ -449,15 +666,100 @@ newInvalidatorSwitch subd = return $! InvalidatorSwitch subd
449666newInvalidatorPull :: Pull a -> IO Invalidator
450667newInvalidatorPull p = return $! InvalidatorPull p
451668
452−{-# NOINLINE newBox #-}
453−newBox :: a -> IO (Box a)
454−newBox a = return $! Box a
669+data Dynamic p a
670+ = DynamicHold !(Hold p a)
671+ | p ~ Identity => DynamicHoldIdentity !(Hold Identity a)
672+ | DynamicConst !a
673+ | DynamicDyn !(Dyn p a)
674+ | p ~ Identity => DynamicDynIdentity !(Dyn Identity a)
675+
676+{-# INLINE current #-}
677+current :: R.Patch p => Dynamic p a -> Behavior a
678+current = \case
679+ DynamicHold h -> BehaviorHold h
680+ DynamicHoldIdentity h -> BehaviorHoldIdentity h
681+ DynamicConst a -> BehaviorConst a
682+ DynamicDyn d -> BehaviorDyn d
683+ DynamicDynIdentity d -> BehaviorDynIdentity d
684+
685+--TODO: If you only need updated, not current, can we avoid actually constructing the Hold?
686+{-# INLINE updated #-}
687+updated :: R.Patch p => Dynamic p a -> Event (p a)
688+updated = \case
689+ DynamicHold h -> EventHold h
690+ DynamicHoldIdentity h -> EventHoldIdentity h
691+ DynamicConst _ -> EventNever
692+ DynamicDyn d -> EventDyn d
693+ DynamicDynIdentity d -> EventDynIdentity d
694+
695+newMapDyn :: (a -> b) -> Dynamic Identity a -> Dynamic Identity b
696+newMapDyn f d = DynamicDynIdentity $ unsafeDyn (fmap f $ readBehaviorTracked $ current d) (Identity . f . runIdentity <$> updated d)
697+
698+instance Functor (Dynamic Identity) where
699+ fmap = newMapDyn
700+
701+instance Applicative (Dynamic Identity) where
702+ pure = DynamicConst
703+ (<*>) = zipDynWith ($)
704+ _ *> b = b
705+ a <* _ = a
706+
707+instance R.FunctorMaybe Event where
708+ fmapMaybe f = push $ return . f
709+
710+instance Align Event where
711+ nil = EventNever
712+ align ea eb = R.fmapMaybe R.dmapToThese $ merge $ DynamicConst $ DMap.fromList [R.LeftTag :=> ea, R.RightTag :=> eb]
713+
714+--TODO: Avoid the duplication between this and R.zipDynWith
715+zipDynWith :: (a -> b -> c) -> Dynamic Identity a -> Dynamic Identity b -> Dynamic Identity c
716+zipDynWith f da db =
717+ let eab = align (updated da) (updated db)
718+ ec = flip push eab $ \o -> do
719+ (a, b) <- case o of
720+ This (Identity a) -> do
721+ b <- readBehaviorUntracked $ current db
722+ return (a, b)
723+ That (Identity b) -> do
724+ a <- readBehaviorUntracked $ current da
725+ return (a, b)
726+ These (Identity a) (Identity b) -> return (a, b)
727+ return $ Just $ Identity $ f a b
728+ in DynamicDynIdentity $ unsafeDyn (f <$> readBehaviorUntracked (current da) <*> readBehaviorUntracked (current db)) ec
729+
730+instance Monad (Dynamic Identity) where
731+ {-# INLINE return #-}
732+ return = pure
733+ {-# INLINE (>>=) #-}
734+ x >>= f = DynamicDynIdentity $ newJoinDyn $ newMapDyn f x --TODO: (>>), fail
735+ {-# INLINE (>>) #-}
736+ _ >> y = y
737+ {-# INLINE fail #-}
738+ fail _ = error "Dynamic does not support 'fail'"
739+
740+newtype Dyn p a = Dyn { unDyn :: IORef (Either (BehaviorM a, Event (p a)) (Hold p a)) }
741+
742+unsafeDyn :: BehaviorM a -> Event (p a) -> Dyn p a
743+unsafeDyn readV0 v' = Dyn $ unsafeNewIORef x $ Left x
744+ where x = (readV0, v')
745+
746+newJoinDyn :: Dynamic Identity (Dynamic Identity a) -> Dyn Identity a
747+newJoinDyn d =
748+ let readV0 = readBehaviorTracked . current =<< readBehaviorTracked (current d)
749+ eOuter = push (fmap (Just . Identity) . readBehaviorUntracked . current . runIdentity) $ updated d
750+ eInner = switch $ updated <$> current d
751+ eBoth = coincidence $ updated . runIdentity <$> updated d
752+ v' = unSpiderEvent $ R.leftmost $ map SpiderEvent [eBoth, eOuter, eInner]
753+ in unsafeDyn readV0 v'
455754
456755--type role Behavior representational
457756data Behavior a
458− = BehaviorHold !(Hold a)
757+ = forall p. BehaviorHold !(Hold p a)
758+ | BehaviorHoldIdentity !(Hold Identity a)
459759 | BehaviorConst !a
460760 | BehaviorPull !(Pull a)
761+ | BehaviorDynIdentity !(Dyn Identity a)
762+ | forall p. R.Patch p => BehaviorDyn !(Dyn p a)
461763
462764-- ResultM can read behaviors and events
463765type ResultM = EventM
@@ -470,24 +772,26 @@ instance Functor Event where
470772 fmap f = push $ return . Just . f
471773
472774instance Functor Behavior where
473− fmap f = pull . liftM f . readBehaviorTracked
775+ fmap f = pull . fmap f . readBehaviorTracked
474776
475777{-# NOINLINE push #-} --TODO: If this is helpful, we can get rid of the unsafeNewIORef and use unsafePerformIO directly
476−push :: (a -> EventM (Maybe b)) -> Event a -> Event b
778+push :: forall a b. (a -> ComputeM (Maybe b)) -> Event a -> Event b
477779push f e = EventPush $ Push
478780 { pushCompute = f
479781 , pushParent = e
480782 , pushSubscribed = unsafeNewIORef (f, e) Nothing --TODO: Does the use of the tuple here create unnecessary overhead?
481783 }
482−{-# RULES "push/push" forall f g e. push f (push g e) = push (maybe (return Nothing) f <=< g) e #-}
784+-- DISABLED: {- RULES "push/push" forall f g e. push f (push g e) = push (maybe (return Nothing) f <=< g) e #-}
483785
484786{-# NOINLINE pull #-}
485787pull :: BehaviorM a -> Behavior a
486788pull a = BehaviorPull $ Pull
487789 { pullCompute = a
488790 , pullValue = unsafeNewIORef a Nothing
791+#ifdef DEBUG_NODEIDS
792+ , pullNodeId = unsafeNodeId a
793+#endif
489794 }
490−{-# RULES "pull/pull" forall a. pull (readBehaviorTracked (pull a)) = pull a #-}
491795
492796{-# NOINLINE switch #-}
493797switch :: Behavior (Event a) -> Event a
@@ -495,7 +799,6 @@ switch a = EventSwitch $ Switch
495799 { switchParent = a
496800 , switchSubscribed = unsafeNewIORef a Nothing
497801 }
498−{-# RULES "switch/constB" forall e. switch (BehaviorConst e) = e #-}
499802
500803coincidence :: Event (Event a) -> Event a
501804coincidence a = EventCoincidence $ Coincidence
@@ -503,32 +806,20 @@ coincidence a = EventCoincidence $ Coincidence
503806 , coincidenceSubscribed = unsafeNewIORef a Nothing
504807 }
505808
506−newRoot :: IO (Root k)
507−newRoot = do
508− occRef <- newIORef DMap.empty
509− subscribedRef <- newIORef DMap.empty
510− return $ Root
511− { rootOccurrence = occRef
512− , rootSubscribed = subscribedRef
513− , rootInit = \_ _ -> return $ return ()
514− }
515−
516−propagateAndUpdateSubscribersRef :: IORef [WeakSubscriber a] -> a -> EventM ()
809+propagateAndUpdateSubscribersRef :: SubscriberList a -> a -> EventM x ()
517810propagateAndUpdateSubscribersRef subscribersRef a = do
518− subscribers <- liftIO $ readIORef subscribersRef
519− liftIO $ writeIORef subscribersRef []
520− stillAlive <- propagate a subscribers
521− liftIO $ modifyIORef' subscribersRef (++stillAlive)
811+ propagate a subscribersRef
522812
523813-- Propagate the given event occurrence; before cleaning up, run the given action, which may read the state of events and behaviors
524−run :: [DSum RootTrigger Identity] -> ResultM b -> IO b
814+run :: [DSum RootTrigger Identity] -> ResultM x b -> SpiderHost x b
525815run roots after = do
526− when debugPropagate $ putStrLn "Running an event frame"
527− result <- runFrame $ do
816+ tracePropagate $ "Running an event frame with " <> show (length roots) <> " events"
817+ spiderEnv <- SpiderHost ask
818+ result <- SpiderHost $ lift $ withMVar (_spiderEnv_lock spiderEnv) $ \_ -> flip runReaderT spiderEnv $ unSpiderHost $ runFrame $ do
528819 rootsToPropagate <- forM roots $ \r@(RootTrigger (_, occRef, k) :=> a) -> do
529820 occBefore <- liftIO $ do
530821 occBefore <- readIORef occRef
531− writeIORef occRef $ DMap.insert k a occBefore
822+ writeIORef occRef $! DMap.insert k a occBefore
532823 return occBefore
533824 if DMap.null occBefore
534825 then do scheduleRootClear occRef
@@ -541,19 +832,19 @@ run roots after = do
541832 delayed <- liftIO $ readIORef delayedRef
542833 case IntMap.minViewWithKey delayed of
543834 Nothing -> return ()
544− Just ((currentHeight, current), future) -> do
545− when debugPropagate $ liftIO $ putStrLn $ "Running height " ++ show currentHeight
546− putCurrentHeight currentHeight
547− liftIO $ writeIORef delayedRef future
548− forM_ current $ \d -> case d of
835+ Just ((currentHeight, cur), future) -> do
836+ tracePropagate $ "Running height " ++ show currentHeight
837+ putCurrentHeight $ Height currentHeight
838+ liftIO $ writeIORef delayedRef $! future
839+ forM_ cur $ \d -> case d of
549840 DelayedMerge subscribed -> do
550841 height <- liftIO $ readIORef $ mergeSubscribedHeight subscribed
551− case height `compare` currentHeight of
842+ case height `compare` Height currentHeight of
552843 LT -> error "Somehow a merge's height has been decreased after it was scheduled"
553844 GT -> scheduleMerge height subscribed -- The height has been increased (by a coincidence event; TODO: is this the only way?)
554845 EQ -> do
555846 m <- liftIO $ readIORef $ mergeSubscribedAccum subscribed
556− liftIO $ writeIORef (mergeSubscribedAccum subscribed) DMap.empty
847+ liftIO $ writeIORef (mergeSubscribedAccum subscribed) $! DMap.empty
557848 --TODO: Assert that m is not empty
558849 liftIO $ writeIORef (mergeSubscribedOccurrence subscribed) $ Just m
559850 scheduleClear $ mergeSubscribedOccurrence subscribed
@@ -562,14 +853,14 @@ run roots after = do
562853 go
563854 putCurrentHeight maxBound
564855 after
565− when debugPropagate $ putStrLn "Done running an event frame"
856+ tracePropagate "Done running an event frame"
566857 return result
567858
568−data SomeMaybeIORef = forall a. SomeMaybeIORef (IORef (Maybe a))
859+data SomeClear = forall a. SomeClear (IORef (Maybe a))
569860
570−data SomeDMapIORef = forall k. SomeDMapIORef (IORef (DMap k Identity))
861+data SomeRootClear = forall k. SomeRootClear (IORef (DMap k Identity))
571862
572−data SomeAssignment = forall a. SomeAssignment (Hold a) a
863+data SomeAssignment = forall a. SomeAssignment {-# UNPACK #-} !(IORef a) {-# UNPACK #-} !(IORef [Weak Invalidator]) a
573864
574865data DelayedMerge = forall k. DelayedMerge (MergeSubscribed k)
575866
@@ -577,136 +868,241 @@ debugFinalize :: Bool
577868debugFinalize = False
578869
579870mkWeakPtrWithDebug :: a -> String -> IO (Weak a)
580−mkWeakPtrWithDebug x debugNote = mkWeakPtr x $
581− if debugFinalize
582− then Just $ putStrLn $ "finalizing: " ++ debugNote
583− else Nothing
871+mkWeakPtrWithDebug x debugNote = do
872+ x' <- evaluate x
873+ mkWeakPtr x' $
874+ if debugFinalize
875+ then Just $ putStrLn $ "finalizing: " ++ debugNote
876+ else Nothing
584877
585878type WeakList a = [Weak a]
586879
587−--TODO: Is it faster to clean up every time, or to occasionally go through and clean up as needed?
588−traverseAndCleanWeakList_ :: Monad m => (wa -> m (Maybe a)) -> [wa] -> (a -> m ()) -> m [wa]
589−traverseAndCleanWeakList_ deRef ws f = go ws
590− where go [] = return []
591− go (h:t) = do
592− ma <- deRef h
593− case ma of
594− Just a -> do
595− f a
596− t' <- go t
597− return $ h : t'
598− Nothing -> go t
880+{-# INLINE withIncreasedDepth #-}
881+#ifdef DEBUG
882+withIncreasedDepth :: CanTrace x m => m a -> m a
883+withIncreasedDepth a = do
884+ spiderEnv <- askSpiderEnv
885+ liftIO $ modifyIORef' (_spiderEnv_depth spiderEnv) succ
886+ result <- a
887+ liftIO $ modifyIORef' (_spiderEnv_depth spiderEnv) pred
888+ return result
889+#else
890+withIncreasedDepth :: m a -> m a
891+withIncreasedDepth = id
892+#endif
893+
894+type CanTrace x m = (HasSpiderEnv x m, MonadIO m)
895+
896+{-# INLINE tracePropagate #-}
897+tracePropagate :: (CanTrace x m) => String -> m ()
898+tracePropagate = traceWhen debugPropagate
899+
900+{-# INLINE traceSubscribe #-}
901+traceSubscribe :: String -> IO ()
902+traceSubscribe = when debugSubscribe . liftIO . putStrLn
903+
904+{-# INLINE traceInvalidate #-}
905+traceInvalidate :: String -> IO ()
906+traceInvalidate = when debugInvalidate . liftIO . putStrLn
907+
908+{-# INLINE traceWhen #-}
909+traceWhen :: (CanTrace x m) => Bool -> String -> m ()
910+traceWhen b message = traceMWhen b $ return message
911+
912+{-# INLINE traceMWhen #-}
913+traceMWhen :: (CanTrace x m) => Bool -> m String -> m ()
914+traceMWhen b getMessage = when b $ do
915+ message <- getMessage
916+#ifdef DEBUG
917+ spiderEnv <- askSpiderEnv
918+ d <- liftIO $ readIORef $ _spiderEnv_depth spiderEnv
919+#else
920+ let d = 0
921+#endif
922+ liftIO $ putStrLn $ replicate d ' ' <> message
923+
924+whoCreatedIORef :: IORef a -> IO [String]
925+whoCreatedIORef (IORef a) = whoCreated $! a
926+
927+whoCreatedEventSubscribed :: EventSubscribed a -> IO [String]
928+whoCreatedEventSubscribed = \case
929+ EventSubscribedRoot _ -> return ["root"]
930+ EventSubscribedNever -> return ["never"]
931+ EventSubscribedPush subscribed -> whoCreatedIORef $ pushSubscribedCachedSubscribed subscribed
932+ EventSubscribedFan _ subscribed -> whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
933+ EventSubscribedMerge subscribed -> whoCreatedIORef $ mergeSubscribedCachedSubscribed subscribed
934+ EventSubscribedSwitch subscribed -> whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
935+ EventSubscribedCoincidence subscribed -> whoCreatedIORef $ coincidenceSubscribedCachedSubscribed subscribed
936+
937+walkInvalidHeightParents :: EventSubscribed a -> IO [Some EventSubscribed]
938+walkInvalidHeightParents s0 = do
939+ subscribers <- flip execStateT mempty $ ($ Some.This s0) $ fix $ \loop (Some.This s) -> do
940+ h <- liftIO $ readIORef $ eventSubscribedHeightRef s
941+ when (h == invalidHeight) $ do
942+ when (eventSubscribedHasOwnHeightRef s) $ liftIO $ writeIORef (eventSubscribedHeightRef s) $! invalidHeightBeingTraversed
943+ modify (Some.This s :)
944+ mapM_ loop =<< liftIO (eventSubscribedGetParents s)
945+ forM_ subscribers $ \(Some.This s) -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
946+ return subscribers
947+
948+groupByHead :: Eq a => [NonEmpty a] -> [(a, NonEmpty [a])]
949+groupByHead = \case
950+ [] -> []
951+ (x :| xs) : t -> case groupByHead t of
952+ [] -> [(x, xs :| [])]
953+ l@((y, yss) : t')
954+ | x == y -> (x, xs `NonEmpty.cons` yss) : t'
955+ | otherwise -> (x, xs :| []) : l
956+
957+listsToForest :: Eq a => [[a]] -> Forest a
958+listsToForest l = fmap (\(a, l') -> Node a $ listsToForest $ toList l') $ groupByHead $ catMaybes $ fmap nonEmpty l
599959
600960-- | Propagate everything at the current height
601−propagate :: a -> [WeakSubscriber a] -> EventM [WeakSubscriber a]
602−propagate a subscribers = do
603− traverseAndCleanWeakList_ (liftIO . deRefWeakSubscriber) subscribers $ \s -> case s of
604− SubscriberPush compute subscribed -> do
605− when debugPropagate $ liftIO $ putStrLn $ "SubscriberPush" <> showNodeId subscribed
606− occ <- compute a
961+propagate :: a -> SubscriberList a -> EventM x ()
962+propagate a subscribers = withIncreasedDepth $ do
963+ -- Note: in the following traversal, we do not visit nodes that are added to the list during our traversal; they are new events, which will necessarily have full information already, so there is no need to traverse them
964+ --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
965+ WeakBag.traverse subscribers $ \s -> case s of
966+ SubscriberPush compute subscribed -> {-# SCC "traversePush" #-} do
967+ tracePropagate $ "SubscriberPush" <> showNodeId subscribed
968+ occ <- runComputeM $ compute a
607969 case occ of
608970 Nothing -> return () -- No need to write a Nothing back into the Ref
609971 Just o -> do
610972 liftIO $ writeIORef (pushSubscribedOccurrence subscribed) occ
611973 scheduleClear $ pushSubscribedOccurrence subscribed
612− liftIO . writeIORef (pushSubscribedSubscribers subscribed) =<< propagate o =<< liftIO (readIORef (pushSubscribedSubscribers subscribed))
613− SubscriberMerge k subscribed -> do
614− when debugPropagate $ liftIO $ putStrLn $ "SubscriberMerge" <> showNodeId subscribed
974+ propagate o $ pushSubscribedSubscribers subscribed
975+ SubscriberMerge k subscribed -> {-# SCC "traverseMerge" #-} do
976+ tracePropagate $ "SubscriberMerge" <> showNodeId subscribed
615977 oldM <- liftIO $ readIORef $ mergeSubscribedAccum subscribed
616− liftIO $ writeIORef (mergeSubscribedAccum subscribed) $ DMap.insertWith (error "Same key fired multiple times for") k (Identity a) oldM
978+ let newM = DMap.insertWith (error $ "Same key fired multiple times for Merge" <> showNodeId subscribed) k (Identity a) oldM
979+ tracePropagate $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
980+ liftIO $ writeIORef (mergeSubscribedAccum subscribed) $! newM
617981 when (DMap.null oldM) $ do -- Only schedule the firing once
618982 height <- liftIO $ readIORef $ mergeSubscribedHeight subscribed
619983 --TODO: assertions about height
620984 currentHeight <- getCurrentHeight
621− when (height <= currentHeight) $ error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")"
985+ when (height <= currentHeight) $ do
986+ myStack <- liftIO $ whoCreatedIORef $ mergeSubscribedCachedSubscribed subscribed
987+ if height /= invalidHeight
988+ then error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
989+ else liftIO $ do
990+ nodesInvolvedInCycle <- walkInvalidHeightParents $ EventSubscribedMerge subscribed
991+ stacks <- forM nodesInvolvedInCycle $ \(Some.This es) -> whoCreatedEventSubscribed es
992+ error $ "Causality loop found:\n" <> drawForest (listsToForest stacks)
622993 scheduleMerge height subscribed
623− SubscriberFan subscribed -> do
994+ SubscriberMergeChange subscribed -> {-# SCC "traverseMergeChange" #-} do
995+ tracePropagate $ "SubscriberMerge" <> showNodeId subscribed
996+ defer $ SomeMergeUpdate a subscribed
997+ SubscriberFan subscribed -> {-# SCC "traverseFan" #-} do
624998 subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
625− when debugPropagate $ liftIO $ putStrLn $ "SubscriberFan" <> showNodeId subscribed <> ": " ++ show (DMap.size subs) ++ " keys subscribed, " ++ show (DMap.size a) ++ " keys firing"
999+ tracePropagate $ "SubscriberFan" <> showNodeId subscribed <> ": " ++ show (DMap.size subs) ++ " keys subscribed, " ++ show (DMap.size a) ++ " keys firing"
6261000 --TODO: We need a better DMap intersection; here, we are assuming that the number of firing keys is small and the number of subscribers is large
627− forM_ (DMap.toList a) $ \(k :=> Identity v) -> case DMap.lookup (FanSubscriberKey k) subs of
1001+ forM_ (DMap.toList a) $ \(k :=> Identity v) -> {-# SCC "SubscriberFan" #-} case DMap.lookup k subs of
6281002 Nothing -> do
629− when debugPropagate $ liftIO $ putStrLn "No subscriber for key"
1003+ tracePropagate "No subscriber for key"
6301004 return ()
631− Just (Identity subsubs) -> do
632− _ <- propagate v subsubs --TODO: use the value of this
1005+ Just subsubs -> do
1006+ propagate v $ _fanSubscribedChildren_list subsubs
6331007 return ()
634− --TODO: The following is way too slow to do all the time
635− subs' <- liftIO $ forM (DMap.toList subs) $ ((\(FanSubscriberKey k :=> Identity subsubs) -> do
636− subsubs' <- traverseAndCleanWeakList_ (liftIO . deRefWeakSubscriber) subsubs (const $ return ())
637− return $ if null subsubs'
638− then Nothing
639− else Just $ FanSubscriberKey k :=> Identity subsubs') :: DSum (FanSubscriberKey k) Identity -> IO (Maybe (DSum (FanSubscriberKey k) Identity)))
640− liftIO $ writeIORef (fanSubscribedSubscribers subscribed) $ DMap.fromDistinctAscList $ catMaybes subs'
641− SubscriberHold h -> do
642− invalidators <- liftIO $ readIORef $ holdInvalidators h
643− when debugPropagate $ liftIO $ putStrLn $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
644− toAssignRef <- askToAssignRef
645− liftIO $ modifyIORef' toAssignRef (SomeAssignment h a :)
646− SubscriberSwitch subscribed -> do
647− when debugPropagate $ liftIO $ putStrLn $ "SubscriberSwitch" <> showNodeId subscribed
1008+ SubscriberHold h -> {-# SCC "traverseHold" #-} propagateSubscriberHold h a
1009+ SubscriberHoldIdentity h -> {-# SCC "traverseHoldIdentity" #-} propagateSubscriberHold h a
1010+ SubscriberSwitch subscribed -> {-# SCC "traverseSwitch" #-} do
1011+ tracePropagate $ "SubscriberSwitch" <> showNodeId subscribed
6481012 liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
6491013 scheduleClear $ switchSubscribedOccurrence subscribed
650− subs <- liftIO $ readIORef $ switchSubscribedSubscribers subscribed
651− liftIO . writeIORef (switchSubscribedSubscribers subscribed) =<< propagate a subs
652− SubscriberCoincidenceOuter subscribed -> do
653− when debugPropagate $ liftIO $ putStrLn $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
1014+ propagate a $ switchSubscribedSubscribers subscribed
1015+ SubscriberCoincidenceOuter subscribed -> {-# SCC "traverseCoincidenceOuter" #-} do
1016+ tracePropagate $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
6541017 outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
655− when debugPropagate $ liftIO $ putStrLn $ " outerHeight = " <> show outerHeight
1018+ tracePropagate $ " outerHeight = " <> show outerHeight
6561019 (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
657− when debugPropagate $ liftIO $ putStrLn $ " isJust occ = " <> show (isJust occ)
658− when debugPropagate $ liftIO $ putStrLn $ " innerHeight = " <> show innerHeight
1020+ tracePropagate $ " isJust occ = " <> show (isJust occ)
1021+ tracePropagate $ " innerHeight = " <> show innerHeight
6591022 liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
6601023 scheduleClear $ coincidenceSubscribedInnerParent subscribed
6611024 case occ of
6621025 Nothing -> do
6631026 when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
664− writeIORef (coincidenceSubscribedHeight subscribed) innerHeight
665− mapM_ invalidateSubscriberHeight =<< readIORef (coincidenceSubscribedSubscribers subscribed)
666− mapM_ recalculateSubscriberHeight =<< readIORef (coincidenceSubscribedSubscribers subscribed)
1027+ writeIORef (coincidenceSubscribedHeight subscribed) $! innerHeight
1028+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
1029+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
6671030 Just o -> do -- Since it's already firing, no need to adjust height
6681031 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
6691032 scheduleClear $ coincidenceSubscribedOccurrence subscribed
670− liftIO . writeIORef (coincidenceSubscribedSubscribers subscribed) =<< propagate o =<< liftIO (readIORef (coincidenceSubscribedSubscribers subscribed))
671− SubscriberCoincidenceInner subscribed -> do
672− when debugPropagate $ liftIO $ putStrLn $ "SubscriberCoincidenceInner" <> showNodeId subscribed
673− liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
674− scheduleClear $ coincidenceSubscribedOccurrence subscribed
675− liftIO . writeIORef (coincidenceSubscribedSubscribers subscribed) =<< propagate a =<< liftIO (readIORef (coincidenceSubscribedSubscribers subscribed))
1033+ propagate o $ coincidenceSubscribedSubscribers subscribed
1034+ SubscriberCoincidenceInner subscribed -> {-# SCC "traverseCoincidenceInner" #-} do
1035+ tracePropagate $ "SubscriberCoincidenceInner" <> showNodeId subscribed
1036+ occ <- liftIO $ readIORef $ coincidenceSubscribedOccurrence subscribed
1037+ case occ of
1038+ Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
1039+ Nothing -> do
1040+ liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
1041+ scheduleClear $ coincidenceSubscribedOccurrence subscribed
1042+ propagate a $ coincidenceSubscribedSubscribers subscribed
1043+ SubscriberHandle -> {-# SCC "traverseHandle" #-} tracePropagate "SubscriberHandle"
1044+
1045+{-# INLINE propagateSubscriberHold #-}
1046+propagateSubscriberHold :: R.Patch p => Hold p a -> p a -> EventM x ()
1047+propagateSubscriberHold h a = do
1048+ {-# SCC "trace" #-} traceMWhen debugPropagate $ liftIO $ do
1049+ invalidators <- liftIO $ readIORef $ holdInvalidators h
1050+ return $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
1051+ v <- {-# SCC "read" #-} liftIO $ readIORef $ holdValue h
1052+ case {-# SCC "apply" #-} R.apply a v of
1053+ Nothing -> return ()
1054+ Just v' -> do
1055+ {-# SCC "trace2" #-} withIncreasedDepth $ tracePropagate $ "propagateSubscriberHold: assigning Hold" <> showNodeId h
1056+ vRef <- {-# SCC "vRef" #-} liftIO $ evaluate $ holdValue h
1057+ iRef <- {-# SCC "iRef" #-} liftIO $ evaluate $ holdInvalidators h
1058+ defer $ {-# SCC "assignment" #-} SomeAssignment vRef iRef v'
6761059
677−data SomeCoincidenceInfo = forall a. SomeCoincidenceInfo (Weak (Subscriber a)) (Subscriber a) (Maybe (CoincidenceSubscribed a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
1060+data SomeResetCoincidence = forall a. SomeResetCoincidence !(EventSubscription a) !(Maybe (CoincidenceSubscribed a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
6781061
679−subscribeCoincidenceInner :: Event a -> Int -> CoincidenceSubscribed a -> EventM (Maybe a, Int, EventSubscribed a)
1062+{-# INLINE subscribeCoincidenceInner #-}
1063+subscribeCoincidenceInner :: CanSubscribe x m => Event a -> Height -> CoincidenceSubscribed a -> m (Maybe a, Height, EventSubscribed a)
6801064subscribeCoincidenceInner o outerHeight subscribedUnsafe = do
6811065 subInner <- liftIO $ newSubscriberCoincidenceInner subscribedUnsafe
682− wsubInner <- liftIO $ mkWeakPtrWithDebug subInner "SubscriberCoincidenceInner"
683− innerSubd <- {-# SCC "innerSubd" #-} (subscribe o $ WeakSubscriberSimple wsubInner)
684− innerOcc <- liftIO $ getEventSubscribedOcc innerSubd
1066+ subscription@(EventSubscription _ innerSubd) <- subscribe o subInner
1067+ innerOcc <- liftIO $ readEventSubscribed innerSubd
6851068 innerHeight <- liftIO $ readIORef $ eventSubscribedHeightRef innerSubd
6861069 let height = max innerHeight outerHeight
687− emitCoincidenceInfo $ SomeCoincidenceInfo wsubInner subInner $ if height > outerHeight then Just subscribedUnsafe else Nothing
1070+ defer $ SomeResetCoincidence subscription $ if height > outerHeight then Just subscribedUnsafe else Nothing
6881071 return (innerOcc, height, innerSubd)
6891072
690−readBehavior :: Behavior a -> IO a
691−readBehavior b = runBehaviorM (readBehaviorTracked b) Nothing --TODO: Specialize readBehaviorTracked to the Nothing and Just cases
1073+{-# SPECIALIZE readBehaviorUntracked :: Behavior a -> BehaviorM a #-}
1074+{-# SPECIALIZE readBehaviorUntracked :: Behavior a -> EventM x a #-}
1075+readBehaviorUntracked :: Defer SomeHoldInit m => Behavior a -> m a
1076+readBehaviorUntracked b = do
1077+ holdInits <- getDeferralQueue
1078+ liftIO $ runBehaviorM (readBehaviorTracked b) Nothing holdInits --TODO: Specialize readBehaviorTracked to the Nothing and Just cases
6921079
693−runBehaviorM :: BehaviorM a -> Maybe (Weak Invalidator, IORef [SomeBehaviorSubscribed]) -> IO a
694−runBehaviorM a mwi = runReaderT (unBehaviorM a) mwi
1080+runBehaviorM :: BehaviorM a -> Maybe (Weak Invalidator, IORef [SomeBehaviorSubscribed]) -> IORef [SomeHoldInit] -> IO a
1081+runBehaviorM a mwi holdInits = runReaderT (unBehaviorM a) (mwi, holdInits)
6951082
6961083askInvalidator :: BehaviorM (Maybe (Weak Invalidator))
697−askInvalidator = liftM (fmap fst) $ BehaviorM ask
1084+askInvalidator = do
1085+ (!m, _) <- BehaviorM ask
1086+ case m of
1087+ Nothing -> return Nothing
1088+ Just (!wi, _) -> return $ Just wi
6981089
6991090askParentsRef :: BehaviorM (Maybe (IORef [SomeBehaviorSubscribed]))
700−askParentsRef = liftM (fmap snd) $ BehaviorM ask
1091+askParentsRef = do
1092+ (!m, _) <- BehaviorM ask
1093+ case m of
1094+ Nothing -> return Nothing
1095+ Just (_, !p) -> return $ Just p
1096+
1097+askBehaviorHoldInits :: BehaviorM (IORef [SomeHoldInit])
1098+askBehaviorHoldInits = do
1099+ (_, !his) <- BehaviorM ask
1100+ return his
7011101
7021102readBehaviorTracked :: Behavior a -> BehaviorM a
7031103readBehaviorTracked b = case b of
704− BehaviorHold h -> do
705− result <- liftIO $ readIORef $ holdValue h
706− askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (holdInvalidators h) (wi:))
707− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedHold h) :))
708− liftIO $ touch $ holdSubscriber h
709− return result
1104+ BehaviorHold h -> readHoldTracked h
1105+ BehaviorHoldIdentity h -> readHoldTracked h
7101106 BehaviorConst a -> return a
7111107 BehaviorPull p -> do
7121108 val <- liftIO $ readIORef $ pullValue p
@@ -720,7 +1116,8 @@ readBehaviorTracked b = case b of
7201116 i <- liftIO $ newInvalidatorPull p
7211117 wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorPull"
7221118 parentsRef <- liftIO $ newIORef []
723− a <- liftIO $ runReaderT (unBehaviorM $ pullCompute p) $ Just (wi, parentsRef)
1119+ holdInits <- askBehaviorHoldInits
1120+ a <- liftIO $ runReaderT (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
7241121 invsRef <- liftIO . newIORef . maybeToList =<< askInvalidator
7251122 parents <- liftIO $ readIORef parentsRef
7261123 let subscribed = PullSubscribed
@@ -732,299 +1129,492 @@ readBehaviorTracked b = case b of
7321129 liftIO $ writeIORef (pullValue p) $ Just subscribed
7331130 askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
7341131 return a
1132+ BehaviorDyn d -> readHoldTracked =<< getDynHold d
1133+ BehaviorDynIdentity d -> readHoldTracked =<< getDynHold d
1134+
1135+{-# INLINE readHoldTracked #-}
1136+readHoldTracked :: Hold p a -> BehaviorM a
1137+readHoldTracked h = do
1138+ result <- liftIO $ readIORef $ holdValue h
1139+ askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (holdInvalidators h) (wi:))
1140+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedHold h) :))
1141+ return result
1142+
1143+{-# INLINE getDynHold #-}
1144+getDynHold :: (Defer SomeHoldInit m, R.Patch p) => Dyn p a -> m (Hold p a)
1145+getDynHold d = do
1146+ mh <- liftIO $ readIORef $ unDyn d
1147+ case mh of
1148+ Right h -> return h
1149+ Left (readV0, v') -> do
1150+ holdInits <- getDeferralQueue
1151+ v0 <- liftIO $ runBehaviorM readV0 Nothing holdInits
1152+ h <- hold v0 v'
1153+ liftIO $ writeIORef (unDyn d) $ Right h
1154+ return h
7351155
1156+{-
7361157readEvent :: Event a -> ResultM (Maybe a)
7371158readEvent e = case e of
738− EventRoot k r -> liftIO . liftM (coerce . DMap.lookup k) . readIORef $ rootOccurrence r
1159+ EventRoot k r -> liftIO . fmap (coerce . DMap.lookup k) . readIORef $ rootOccurrence r
7391160 EventNever -> return Nothing
7401161 EventPush p -> do
7411162 subscribed <- getPushSubscribed p
742− liftIO $ do
743− result <- readIORef $ pushSubscribedOccurrence subscribed -- Since ResultM is always called after the final height is reached, this will always be valid
744− touch $ pushSubscribedSelf subscribed
745− return result
1163+ liftIO $ readPushSubscribed subscribed
7461164 EventMerge m -> do
7471165 subscribed <- getMergeSubscribed m
748− liftIO $ do
749− result <- readIORef $ mergeSubscribedOccurrence subscribed
750− touch $ mergeSubscribedSelf subscribed
751− return result
1166+ liftIO $ readMergeSubscribed subscribed
7521167 EventFan k f -> do
753− parentOcc <- readEvent $ fanParent f
754− return . coerce $ DMap.lookup k =<< parentOcc
1168+ subscribed <- getFanSubscribed f
1169+ liftIO $ readFanSubscribed k subscribed
7551170 EventSwitch s -> do
7561171 subscribed <- getSwitchSubscribed s
757− liftIO $ do
758− result <- readIORef $ switchSubscribedOccurrence subscribed
759− touch $ switchSubscribedSelf subscribed
760− touch $ switchSubscribedOwnInvalidator subscribed
761− return result
1172+ liftIO $ readSwitchSubscribed subscribed
7621173 EventCoincidence c -> do
7631174 subscribed <- getCoincidenceSubscribed c
764− liftIO $ do
765− result <- readIORef $ coincidenceSubscribedOccurrence subscribed
766− touch $ coincidenceSubscribedOuter subscribed
767− --TODO: do we need to touch the inner subscriber?
768− return result
1175+ liftIO $ readCoincidenceSubscribed subscribed
1176+ EventHold h -> liftIO . readEventSubscribed =<< getHoldEventSubscription h
1177+ EventDyn d -> liftIO . readEventSubscribed =<< getHoldEventSubscription =<< getDynHold d
1178+ EventHoldIdentity h -> liftIO . readEventSubscribed =<< getHoldEventSubscription h
1179+ EventDynIdentity d -> liftIO . readEventSubscribed =<< getHoldEventSubscription =<< getDynHold d
1180+-}
1181+
1182+readEventSubscribed :: EventSubscribed a -> IO (Maybe a)
1183+readEventSubscribed = \case
1184+ EventSubscribedRoot rs -> readRootSubscribed rs
1185+ EventSubscribedNever -> return Nothing
1186+ EventSubscribedPush ps -> readPushSubscribed ps
1187+ EventSubscribedMerge ms -> readMergeSubscribed ms
1188+ EventSubscribedFan k fs -> readFanSubscribed k fs
1189+ EventSubscribedSwitch ss -> readSwitchSubscribed ss
1190+ EventSubscribedCoincidence cs -> readCoincidenceSubscribed cs
1191+
1192+readRootSubscribed :: RootSubscribed a -> IO (Maybe a)
1193+readRootSubscribed = rootSubscribedOccurrence
1194+
1195+readPushSubscribed :: PushSubscribed b a -> IO (Maybe a)
1196+readPushSubscribed subscribed = do
1197+ result <- readIORef $ pushSubscribedOccurrence subscribed -- Since ResultM is always called after the final height is reached, this will always be valid
1198+ touch $ pushSubscribedSelf subscribed
1199+ return result
1200+
1201+readMergeSubscribed :: MergeSubscribed k -> IO (Maybe (DMap k Identity))
1202+readMergeSubscribed subscribed = do
1203+ result <- readIORef $ mergeSubscribedOccurrence subscribed
1204+ touch $ mergeSubscribedParents subscribed
1205+ return result
1206+
1207+readFanSubscribed :: GCompare k => k a -> FanSubscribed k -> IO (Maybe a)
1208+readFanSubscribed k fs = do
1209+ parentOcc <- readEventSubscribed $ _eventSubscription_subscribed $ fanSubscribedParent fs
1210+ return $ coerce $ DMap.lookup k =<< parentOcc
1211+
1212+readSwitchSubscribed :: SwitchSubscribed a -> IO (Maybe a)
1213+readSwitchSubscribed subscribed = do
1214+ result <- readIORef $ switchSubscribedOccurrence subscribed
1215+ touch $ switchSubscribedOwnInvalidator subscribed
1216+ return result
1217+
1218+readCoincidenceSubscribed :: CoincidenceSubscribed a -> IO (Maybe a)
1219+readCoincidenceSubscribed subscribed = do
1220+ result <- readIORef $ coincidenceSubscribedOccurrence subscribed
1221+ touch $ coincidenceSubscribedOuter subscribed
1222+ --TODO: do we need to touch the inner subscriber?
1223+ return result
7691224
7701225-- Always refers to 0
7711226{-# NOINLINE zeroRef #-}
772−zeroRef :: IORef Int
773−zeroRef = unsafePerformIO $ newIORef 0
774−
775−getEventSubscribed :: Event a -> EventM (EventSubscribed a)
776−getEventSubscribed e = case e of
777− EventRoot k r -> liftM EventSubscribedRoot $ getRootSubscribed k r
778− EventNever -> return EventSubscribedNever
779− EventPush p -> liftM EventSubscribedPush $ getPushSubscribed p
780− EventFan k f -> liftM (EventSubscribedFan k) $ getFanSubscribed f
781− EventMerge m -> liftM EventSubscribedMerge $ getMergeSubscribed m
782− EventSwitch s -> liftM EventSubscribedSwitch $ getSwitchSubscribed s
783− EventCoincidence c -> liftM EventSubscribedCoincidence $ getCoincidenceSubscribed c
784−
1227+zeroRef :: IORef Height
1228+zeroRef = unsafePerformIO $ newIORef zeroHeight
1229+
1230+{-# SPECIALIZE subscribe :: Event a -> Subscriber a -> EventM x (EventSubscription a) #-}
1231+subscribe :: forall x m a. CanSubscribe x m => Event a -> Subscriber a -> m (EventSubscription a)
1232+subscribe e sub = case e of
1233+ EventRoot k r -> wrap EventSubscribedRoot $ liftIO . getRootSubscribed k r
1234+ EventNever -> return $ EventSubscription Nothing EventSubscribedNever
1235+ EventPush p -> wrap EventSubscribedPush $ getPushSubscribed p
1236+ EventFan k f -> wrap (EventSubscribedFan k) $ getFanSubscribed k f
1237+ EventMerge m -> wrap EventSubscribedMerge $ getMergeSubscribed m
1238+ EventSwitch s -> wrap EventSubscribedSwitch $ getSwitchSubscribed s
1239+ EventCoincidence c -> wrap EventSubscribedCoincidence $ getCoincidenceSubscribed c
1240+ EventHold h -> subscribeHoldEvent h sub
1241+ EventDyn j -> getDynHold j >>= \h -> subscribeHoldEvent h sub
1242+ EventHoldIdentity h -> subscribeHoldEvent h sub
1243+ EventDynIdentity j -> getDynHold j >>= \h -> subscribeHoldEvent h sub
1244+ where
1245+ wrap :: (t -> EventSubscribed a) -> (Subscriber a -> m (SubscriberListTicket a, t)) -> m (EventSubscription a)
1246+ wrap tag getSpecificSubscribed = do
1247+ (sln, subd) <- getSpecificSubscribed sub
1248+ return $ EventSubscription (Just sln) $ tag subd
1249+
1250+{-# INLINE subscribeHoldEvent #-}
1251+subscribeHoldEvent :: (CanSubscribe x m, R.Patch p) => Hold p a -> Subscriber (p a) -> m (EventSubscription (p a))
1252+subscribeHoldEvent h sub = do
1253+ EventSubscription _ subd <- getHoldEventSubscription h
1254+ sln <- liftIO $ subscribeEventSubscribed subd sub
1255+ return $ EventSubscription sln subd
1256+
1257+{-# INLINE debugSubscribe #-}
7851258debugSubscribe :: Bool
7861259debugSubscribe = False
7871260
788−subscribeEventSubscribed :: EventSubscribed a -> WeakSubscriber a -> IO ()
789−subscribeEventSubscribed es ws = case es of
1261+{-# INLINE subscribeEventSubscribed #-}
1262+subscribeEventSubscribed :: EventSubscribed a -> Subscriber a -> IO (Maybe (SubscriberListTicket a))
1263+subscribeEventSubscribed es sub = case es of
7901264 EventSubscribedRoot r -> do
791− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Root"
792− modifyIORef' (rootSubscribedSubscribers r) (ws:)
1265+ traceSubscribe $ "subscribeEventSubscribed Root"
1266+ Just <$> subscribeRootSubscribed r sub
7931267 EventSubscribedNever -> do
794− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Never"
795− return ()
1268+ traceSubscribe $ "subscribeEventSubscribed Never"
1269+ return Nothing
7961270 EventSubscribedPush subscribed -> do
797− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Push"
798− modifyIORef' (pushSubscribedSubscribers subscribed) (ws:)
1271+ traceSubscribe $ "subscribeEventSubscribed Push"
1272+ Just <$> subscribePushSubscribed subscribed sub
7991273 EventSubscribedFan k subscribed -> do
800− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Fan"
801− modifyIORef' (fanSubscribedSubscribers subscribed) $ DMap.insertWith (liftA2 (++)) (FanSubscriberKey k) (Identity [ws])
1274+ traceSubscribe $ "subscribeEventSubscribed Fan"
1275+ Just <$> subscribeFanSubscribed k subscribed sub
8021276 EventSubscribedMerge subscribed -> do
803− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Merge"
804− modifyIORef' (mergeSubscribedSubscribers subscribed) (ws:)
1277+ traceSubscribe $ "subscribeEventSubscribed Merge"
1278+ Just <$> subscribeMergeSubscribed subscribed sub
8051279 EventSubscribedSwitch subscribed -> do
806− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Switch"
807− modifyIORef' (switchSubscribedSubscribers subscribed) (ws:)
1280+ traceSubscribe $ "subscribeEventSubscribed Switch"
1281+ Just <$> subscribeSwitchSubscribed subscribed sub
8081282 EventSubscribedCoincidence subscribed -> do
809− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Coincidence"
810− modifyIORef' (coincidenceSubscribedSubscribers subscribed) (ws:)
1283+ traceSubscribe $ "subscribeEventSubscribed Coincidence"
1284+ Just <$> subscribeCoincidenceSubscribed subscribed sub
8111285
812−getEventSubscribedOcc :: EventSubscribed a -> IO (Maybe a)
813−getEventSubscribedOcc es = case es of
814− EventSubscribedRoot r -> rootSubscribedOccurrence r
815− EventSubscribedNever -> return Nothing
816− EventSubscribedPush subscribed -> readIORef $ pushSubscribedOccurrence subscribed
817− EventSubscribedFan k subscribed -> do
818− parentOcc <- getEventSubscribedOcc $ fanSubscribedParent subscribed
819− let occ = coerce $ DMap.lookup k =<< parentOcc
820− return occ
821− EventSubscribedMerge subscribed -> readIORef $ mergeSubscribedOccurrence subscribed
822− EventSubscribedSwitch subscribed -> readIORef $ switchSubscribedOccurrence subscribed
823− EventSubscribedCoincidence subscribed -> readIORef $ coincidenceSubscribedOccurrence subscribed
824−
825−eventSubscribedHeightRef :: EventSubscribed a -> IORef Int
826−eventSubscribedHeightRef es = case es of
1286+{-# INLINE eventSubscribedHeightRef #-}
1287+eventSubscribedHeightRef :: EventSubscribed a -> IORef Height
1288+eventSubscribedHeightRef = \case
8271289 EventSubscribedRoot _ -> zeroRef
8281290 EventSubscribedNever -> zeroRef
8291291 EventSubscribedPush subscribed -> pushSubscribedHeight subscribed
830− EventSubscribedFan _ subscribed -> eventSubscribedHeightRef $ fanSubscribedParent subscribed
1292+ EventSubscribedFan _ subscribed -> eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
8311293 EventSubscribedMerge subscribed -> mergeSubscribedHeight subscribed
8321294 EventSubscribedSwitch subscribed -> switchSubscribedHeight subscribed
8331295 EventSubscribedCoincidence subscribed -> coincidenceSubscribedHeight subscribed
8341296
835−subscribe :: Event a -> WeakSubscriber a -> EventM (EventSubscribed a)
836−subscribe e ws = do
837− subd <- getEventSubscribed e
838− liftIO $ subscribeEventSubscribed subd ws
839− return subd
1297+{-# INLINE eventSubscribedHasOwnHeightRef #-}
1298+eventSubscribedHasOwnHeightRef :: EventSubscribed a -> Bool
1299+eventSubscribedHasOwnHeightRef = \case
1300+ EventSubscribedRoot _ -> False
1301+ EventSubscribedNever -> False
1302+ EventSubscribedPush _ -> False
1303+ EventSubscribedFan _ _ -> False
1304+ EventSubscribedMerge _ -> True
1305+ EventSubscribedSwitch _ -> True
1306+ EventSubscribedCoincidence _ -> True
1307+
1308+{-# INLINE eventSubscribedGetParents #-}
1309+eventSubscribedGetParents :: EventSubscribed a -> IO [Some EventSubscribed]
1310+eventSubscribedGetParents = \case
1311+ EventSubscribedRoot _ -> return []
1312+ EventSubscribedNever -> return []
1313+ EventSubscribedPush subscribed -> return [Some.This $ _eventSubscription_subscribed $ pushSubscribedParent subscribed]
1314+ EventSubscribedFan _ subscribed -> return [Some.This $ _eventSubscription_subscribed $ fanSubscribedParent subscribed]
1315+ EventSubscribedMerge subscribed -> do
1316+ ps <- readIORef $ mergeSubscribedParents subscribed
1317+ return $ R.ffor (DMap.toList ps) $ \(_ :=> v) -> Some.This $ _eventSubscription_subscribed $ mergeSubscribedParentSubscription v
1318+ EventSubscribedSwitch subscribed -> do
1319+ s <- readIORef $ switchSubscribedCurrentParent subscribed
1320+ return [Some.This $ _eventSubscription_subscribed s]
1321+ EventSubscribedCoincidence subscribed -> do
1322+ innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
1323+ let outerParent = Some.This $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
1324+ innerParents = maybeToList $ fmap Some.This innerSubscription
1325+ return $ outerParent : innerParents
1326+
1327+type CanSubscribe x m =
1328+ ( HasSpiderEnv x m
1329+ , HasCurrentHeight m
1330+ , Defer SomeHoldInit m, Defer SomeMergeInit m -- The things we need to lazily initialize state
1331+ , Defer SomeClear m -- Wiping out event firings
1332+ , Defer SomeAssignment m -- Updating state
1333+ , Defer SomeResetCoincidence m
1334+ )
1335+
1336+getRootSubscribed :: GCompare k => k a -> Root k -> Subscriber a -> IO (SubscriberListTicket a, RootSubscribed a)
1337+getRootSubscribed k r sub = do
1338+ mSubscribed <- readIORef $ rootSubscribed r
1339+ case DMap.lookup k mSubscribed of
1340+ Just subscribed -> {-# SCC "hitRoot" #-} do
1341+ sln <- subscribeRootSubscribed subscribed sub
1342+ return (sln, subscribed)
1343+ Nothing -> {-# SCC "missRoot" #-} do
1344+ weakSelf <- newIORef $ error "getRootSubscribed: weakSelfRef not initialized"
1345+ let !cached = rootSubscribed r
1346+ uninitRef <- newIORef $ error "getRootsubscribed: uninitRef not initialized"
1347+ (subs, sln) <- WeakBag.singleton sub weakSelf cleanupRootSubscribed
1348+ when debugPropagate $ putStrLn $ "getRootSubscribed: calling rootInit"
1349+ uninit <- rootInit r k $ RootTrigger (subs, rootOccurrence r, k)
1350+ writeIORef uninitRef $! uninit
1351+ let subscribed = RootSubscribed
1352+ { rootSubscribedKey = k
1353+ , rootSubscribedCachedSubscribed = cached
1354+ , rootSubscribedOccurrence = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
1355+ , rootSubscribedSubscribers = subs
1356+ , rootSubscribedUninit = uninit
1357+ , rootSubscribedWeakSelf = weakSelf
1358+#ifdef DEBUG_NODEIDS
1359+ , rootSubscribedNodeId = unsafeNodeId (k, r, subs)
1360+#endif
1361+ }
1362+ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "RootSubscribed"
1363+ modifyIORef' (rootSubscribed r) $ DMap.insertWith (error $ "getRootSubscribed: duplicate key inserted into Root") k subscribed --TODO: I think we can just write back mSubscribed rather than re-reading it
1364+ return (sln, subscribed)
8401365
841−noinlineFalse :: Bool
842−noinlineFalse = False
843−{-# NOINLINE noinlineFalse #-}
1366+{-# ANN cleanupRootSubscribed "HLint: ignore Redundant bracket" #-}
1367+cleanupRootSubscribed :: RootSubscribed a -> IO ()
1368+cleanupRootSubscribed self@(RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached }) = do
1369+ rootSubscribedUninit self
1370+ modifyIORef' cached $ DMap.delete k
8441371
845−getRootSubscribed :: GCompare k => k a -> Root k -> EventM (RootSubscribed a)
846−getRootSubscribed k r = do
847− mSubscribed <- liftIO $ readIORef $ rootSubscribed r
848− case DMap.lookup k mSubscribed of
849− Just subscribed -> return subscribed
850− Nothing -> liftIO $ do
851− subscribersRef <- newIORef []
852− subscribed <- newRootSubscribed (liftM (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r) subscribersRef
853− -- Strangely, init needs the same stuff as a RootSubscribed has, but it must not be the same as the one that everyone's subscribing to, or it'll leak memory
854− uninit <- rootInit r k $ RootTrigger (subscribersRef, rootOccurrence r, k)
855− addFinalizer subscribed $ do
856− when noinlineFalse $ putStr "" -- For some reason, without this line, the finalizer will run earlier than it should
857−-- putStrLn "Uninit root"
858− uninit
859− liftIO $ modifyIORef' (rootSubscribed r) $ DMap.insert k subscribed
860− return subscribed
1372+{-# INLINE subscribeRootSubscribed #-}
1373+subscribeRootSubscribed :: RootSubscribed a -> Subscriber a -> IO (SubscriberListTicket a)
1374+subscribeRootSubscribed subscribed sub = WeakBag.insert sub (rootSubscribedSubscribers subscribed) (rootSubscribedWeakSelf subscribed) cleanupRootSubscribed
8611375
8621376-- When getPushSubscribed returns, the PushSubscribed returned will have a fully filled-in
863−getPushSubscribed :: Push a b -> EventM (PushSubscribed a b)
864−getPushSubscribed p = do
1377+{-# SPECIALIZE getPushSubscribed :: Push a b -> Subscriber b -> EventM x (SubscriberListTicket b, PushSubscribed a b) #-}
1378+getPushSubscribed :: CanSubscribe x m => Push a b -> Subscriber b -> m (SubscriberListTicket b, PushSubscribed a b)
1379+getPushSubscribed p sub = do
8651380 mSubscribed <- liftIO $ readIORef $ pushSubscribed p
8661381 case mSubscribed of
867− Just subscribed -> return subscribed
868− Nothing -> do -- Not yet subscribed
869− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ liftM fromJust $ readIORef $ pushSubscribed p
1382+ Just subscribed -> {-# SCC "hitPush" #-} do
1383+ sln <- liftIO $ subscribePushSubscribed subscribed sub
1384+ return (sln, subscribed)
1385+ Nothing -> {-# SCC "missPush" #-} do -- Not yet subscribed
1386+ subscribedRef <- liftIO $ newIORef $ error "getPushSubscribed: subscribed not yet intialized"
1387+ subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
8701388 s <- liftIO $ newSubscriberPush (pushCompute p) subscribedUnsafe
871− ws <- liftIO $ mkWeakPtrWithDebug s "SubscriberPush"
872− subd <- subscribe (pushParent p) $ WeakSubscriberSimple ws
873− parentOcc <- liftIO $ getEventSubscribedOcc subd
874− occ <- liftM join $ mapM (pushCompute p) parentOcc
1389+ subscription@(EventSubscription _ subd) <- subscribe (pushParent p) s
1390+ parentOcc <- liftIO $ readEventSubscribed subd
1391+ occ <- runComputeM $ join <$> mapM (pushCompute p) parentOcc
8751392 occRef <- liftIO $ newIORef occ
8761393 when (isJust occ) $ scheduleClear occRef
877− subscribersRef <- liftIO $ newIORef []
1394+ weakSelf <- liftIO $ newIORef $ error "getPushSubscribed: weakSelf not initialized"
1395+ let !cached = pushSubscribed p
1396+ (subs, sln) <- liftIO $ WeakBag.singleton sub weakSelf cleanupPushSubscribed
8781397 let subscribed = PushSubscribed
879− { pushSubscribedOccurrence = occRef
1398+ { pushSubscribedCachedSubscribed = cached
1399+ , pushSubscribedOccurrence = occRef
8801400 , pushSubscribedHeight = eventSubscribedHeightRef subd -- Since pushes have the same height as their parents, share the ref
881− , pushSubscribedSubscribers = subscribersRef
882− , pushSubscribedSelf = unsafeCoerce s
883− , pushSubscribedParent = subd
1401+ , pushSubscribedSubscribers = subs
1402+ , pushSubscribedSelf = s
1403+ , pushSubscribedWeakSelf = weakSelf
1404+ , pushSubscribedParent = subscription
8841405#ifdef DEBUG_NODEIDS
8851406 , pushSubscribedNodeId = unsafeNodeId p
8861407#endif
8871408 }
1409+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "PushSubscribed"
1410+ liftIO $ writeIORef subscribedRef $! subscribed
8881411 liftIO $ writeIORef (pushSubscribed p) $ Just subscribed
889− return subscribed
1412+ return (sln, subscribed)
1413+
1414+cleanupPushSubscribed :: PushSubscribed a b -> IO ()
1415+cleanupPushSubscribed self = do
1416+ unsubscribe $ pushSubscribedParent self
1417+ writeIORef (pushSubscribedCachedSubscribed self) $ Nothing
1418+
1419+{-# INLINE subscribePushSubscribed #-}
1420+subscribePushSubscribed :: PushSubscribed a b -> Subscriber b -> IO (SubscriberListTicket b)
1421+subscribePushSubscribed subscribed sub = WeakBag.insert sub (pushSubscribedSubscribers subscribed) (pushSubscribedWeakSelf subscribed) cleanupPushSubscribed
8901422
891−getMergeSubscribed :: forall k. GCompare k => Merge k -> EventM (MergeSubscribed k)
892−getMergeSubscribed m = {-# SCC "getMergeSubscribed.entire" #-} do
1423+{-# SPECIALIZE getMergeSubscribed :: GCompare k => Merge k -> Subscriber (DMap k Identity) -> EventM x (SubscriberListTicket (DMap k Identity), MergeSubscribed k) #-}
1424+getMergeSubscribed :: forall x k m. (CanSubscribe x m, GCompare k) => Merge k -> Subscriber (DMap k Identity) -> m (SubscriberListTicket (DMap k Identity), MergeSubscribed k)
1425+getMergeSubscribed m sub = do
8931426 mSubscribed <- liftIO $ readIORef $ mergeSubscribed m
8941427 case mSubscribed of
895− Just subscribed -> return subscribed
896− Nothing -> if DMap.null $ mergeParents m then emptyMergeSubscribed else do
1428+ Just subscribed -> {-# SCC "hitMerge" #-} do
1429+ sln <- liftIO $ subscribeMergeSubscribed subscribed sub
1430+ return (sln, subscribed)
1431+ Nothing -> {-# SCC "missMerge" #-} do
8971432 subscribedRef <- liftIO $ newIORef $ error "getMergeSubscribed: subscribedRef not yet initialized"
8981433 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
899− s <- liftIO $ newBox subscribedUnsafe
900− ws <- liftIO $ mkWeakPtrWithDebug s "SubscriberMerge"
901− subscribers :: [(Any, Maybe (DSum k Identity), Int, DSum k EventSubscribed)] <- forM (DMap.toList $ mergeParents m) $ {-# SCC "getMergeSubscribed.a" #-} \(k :=> e) -> {-# SCC "getMergeSubscribed.a1" #-} do
902− parentSubd <- {-# SCC "getMergeSubscribed.a.parentSubd" #-} subscribe e $ WeakSubscriberMerge k ws
903− parentOcc <- {-# SCC "getMergeSubscribed.a.parentOcc" #-} liftIO $ getEventSubscribedOcc parentSubd
904− height <- {-# SCC "getMergeSubscribed.a.height" #-} liftIO $ readIORef $ eventSubscribedHeightRef parentSubd
905− return $ {-# SCC "getMergeSubscribed.a.returnVal" #-} (unsafeCoerce s :: Any, fmap (\x -> k :=> Identity x) parentOcc, height, k :=> parentSubd)
906− let dm = DMap.fromDistinctAscList $ catMaybes $ map (\(_, x, _, _) -> x) subscribers
907− subscriberHeights = map (\(_, _, x, _) -> x) subscribers
908− myHeight =
909− if any (==invalidHeight) subscriberHeights --TODO: Replace 'any' with invalidHeight-preserving 'maximum'
910− then invalidHeight
911− else succ $ Prelude.maximum subscriberHeights -- This is safe because the DMap will never be empty here
1434+ initialParents <- readBehaviorUntracked $ current $ mergeParents m
1435+ subscribers :: [(Maybe (DSum k Identity), Height, DSum k (MergeSubscribedParent k))] <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1436+ s <- liftIO $ newSubscriberMerge k subscribedUnsafe
1437+ subscription@(EventSubscription _ parentSubd) <- subscribe e s
1438+ parentOcc <- liftIO $ readEventSubscribed parentSubd
1439+ height <- liftIO $ readIORef $ eventSubscribedHeightRef parentSubd
1440+ return $ (fmap (\x -> k :=> Identity x) parentOcc, height, k :=> MergeSubscribedParent subscription s)
1441+ let dm = DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1442+ heights = fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1443+ myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
1444+ myHeight = if invalidHeight `elem` heights
1445+ then invalidHeight
1446+ else succHeight $ heightBagMax myHeightBag
9121447 currentHeight <- getCurrentHeight
9131448 let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
9141449 then (if DMap.null dm then Nothing else Just dm, DMap.empty)
9151450 else (Nothing, dm)
916− when (not $ DMap.null accum) $ do
1451+ unless (DMap.null accum) $ do
9171452 scheduleMerge myHeight subscribedUnsafe
9181453 occRef <- liftIO $ newIORef occ
9191454 when (isJust occ) $ scheduleClear occRef
9201455 accumRef <- liftIO $ newIORef accum
9211456 heightRef <- liftIO $ newIORef myHeight
922− subsRef <- liftIO $ newIORef []
923− let subscribed = MergeSubscribed
924− { mergeSubscribedOccurrence = occRef
1457+ heightMapRef <- liftIO $ newIORef myHeightBag
1458+ weakSelf <- liftIO $ newIORef $ error "getMergeSubscribed: weakSelf not yet initialized"
1459+ (subs, sln) <- liftIO $ WeakBag.singleton sub weakSelf cleanupMergeSubscribed
1460+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
1461+ parentsRef <- liftIO $ newIORef $ DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1462+ let !subscribed = MergeSubscribed
1463+ { mergeSubscribedCachedSubscribed = mergeSubscribed m
1464+ , mergeSubscribedOccurrence = occRef
9251465 , mergeSubscribedAccum = accumRef
9261466 , mergeSubscribedHeight = heightRef
927− , mergeSubscribedSubscribers = subsRef
928− , mergeSubscribedSelf = unsafeCoerce $ map (\(x, _, _, _) -> x) subscribers --TODO: Does lack of strictness make this leak?
929− , mergeSubscribedParents = DMap.fromDistinctAscList $ map (\(_, _, _, x) -> x) subscribers
1467+ , mergeSubscribedHeightBag = heightMapRef
1468+ , mergeSubscribedSubscribers = subs
1469+ , mergeSubscribedChange = changeSubdRef
1470+ , mergeSubscribedParents = parentsRef
1471+ , mergeSubscribedWeakSelf = weakSelf
9301472#ifdef DEBUG_NODEIDS
9311473 , mergeSubscribedNodeId = unsafeNodeId m
9321474#endif
9331475 }
934− liftIO $ writeIORef subscribedRef subscribed
935− return subscribed
936− where emptyMergeSubscribed = do --TODO: This should never happen
937− occRef <- liftIO $ newIORef Nothing
938− accumRef <- liftIO $ newIORef DMap.empty
939− subsRef <- liftIO $ newIORef []
940− return $ MergeSubscribed
941− { mergeSubscribedOccurrence = occRef
942− , mergeSubscribedAccum = accumRef
943− , mergeSubscribedHeight = zeroRef
944− , mergeSubscribedSubscribers = subsRef --TODO: This will definitely leak
945− , mergeSubscribedSelf = unsafeCoerce ()
946− , mergeSubscribedParents = DMap.empty
947−#ifdef DEBUG_NODEIDS
948− , mergeSubscribedNodeId = -1
949−#endif
950− }
951−
952−getFanSubscribed :: GCompare k => Fan k -> EventM (FanSubscribed k)
953−getFanSubscribed f = do
1476+ defer $ SomeMergeInit subscribed $ updated $ mergeParents m
1477+ liftIO $ writeIORef subscribedRef $! subscribed
1478+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "MergeSubscribed"
1479+ liftIO $ writeIORef (mergeSubscribed m) $ Just subscribed
1480+ return (sln, subscribed)
1481+
1482+cleanupMergeSubscribed :: MergeSubscribed k -> IO ()
1483+cleanupMergeSubscribed subscribed = do
1484+ parents <- readIORef $ mergeSubscribedParents subscribed
1485+ forM_ (DMap.toList parents) $ \(_ :=> msp) -> unsubscribe $ mergeSubscribedParentSubscription msp
1486+ -- Not necessary, because this whole MergeSubscribed is dead: writeIORef (mergeSubscribedParents subscribed) DMap.empty
1487+ writeIORef (mergeSubscribedCachedSubscribed subscribed) $ Nothing -- Get rid of the cached subscribed
1488+
1489+{-# INLINE subscribeMergeSubscribed #-}
1490+subscribeMergeSubscribed :: MergeSubscribed k -> Subscriber (DMap k Identity) -> IO (SubscriberListTicket (DMap k Identity))
1491+subscribeMergeSubscribed subscribed sub = WeakBag.insert sub (mergeSubscribedSubscribers subscribed) (mergeSubscribedWeakSelf subscribed) cleanupMergeSubscribed
1492+
1493+{-# SPECIALIZE getFanSubscribed :: GCompare k => k a -> Fan k -> Subscriber a -> EventM x (SubscriberListTicket a, FanSubscribed k) #-}
1494+getFanSubscribed :: (Defer SomeAssignment m, Defer SomeHoldInit m, Defer SomeMergeInit m, Defer SomeClear m, HasCurrentHeight m, Defer SomeResetCoincidence m, HasSpiderEnv x m, GCompare k) => k a -> Fan k -> Subscriber a -> m (SubscriberListTicket a, FanSubscribed k)
1495+getFanSubscribed k f sub = do
9541496 mSubscribed <- liftIO $ readIORef $ fanSubscribed f
9551497 case mSubscribed of
956− Just subscribed -> return subscribed
957− Nothing -> do
958− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ liftM fromJust $ readIORef $ fanSubscribed f
959− sub <- liftIO $ newSubscriberFan subscribedUnsafe
960− wsub <- liftIO $ mkWeakPtrWithDebug sub "SubscriberFan"
961− subd <- subscribe (fanParent f) $ WeakSubscriberSimple wsub
962− subscribersRef <- liftIO $ newIORef DMap.empty
1498+ Just subscribed -> {-# SCC "hitFan" #-} do
1499+ sln <- liftIO $ subscribeFanSubscribed k subscribed sub
1500+ return (sln, subscribed)
1501+ Nothing -> {-# SCC "missFan" #-} do
1502+ subscribedRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribedRef not yet initialized"
1503+ subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1504+ s <- liftIO $ newSubscriberFan subscribedUnsafe
1505+ subscription <- subscribe (fanParent f) s
1506+ weakSelf <- liftIO $ newIORef $ error "getFanSubscribed: weakSelf not yet initialized"
1507+ (subsForK, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupFanSubscribed
1508+ subscribersRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribersRef not yet initialized"
9631509 let subscribed = FanSubscribed
964− { fanSubscribedParent = subd
1510+ { fanSubscribedCachedSubscribed = fanSubscribed f
1511+ , fanSubscribedParent = subscription
9651512 , fanSubscribedSubscribers = subscribersRef
966− , fanSubscribedSelf = sub
9671513#ifdef DEBUG_NODEIDS
9681514 , fanSubscribedNodeId = unsafeNodeId f
9691515#endif
9701516 }
1517+ let !self = (k, subscribed)
1518+ liftIO $ writeIORef subscribersRef $! DMap.singleton k $ FanSubscribedChildren subsForK self weakSelf
1519+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug self "FanSubscribed"
1520+ liftIO $ writeIORef subscribedRef $! subscribed
9711521 liftIO $ writeIORef (fanSubscribed f) $ Just subscribed
972− return subscribed
973−
974−getSwitchSubscribed :: Switch a -> EventM (SwitchSubscribed a)
975−getSwitchSubscribed s = do
1522+ return (slnForSub, subscribed)
1523+
1524+cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed k) -> IO ()
1525+cleanupFanSubscribed (k, subscribed) = do
1526+ subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1527+ let reducedSubscribers = DMap.delete k subscribers
1528+ if DMap.null reducedSubscribers
1529+ then do
1530+ unsubscribe $ fanSubscribedParent subscribed
1531+ -- Not necessary in this case, because this whole FanSubscribed is dead: writeIORef (fanSubscribedSubscribers subscribed) reducedSubscribers
1532+ writeIORef (fanSubscribedCachedSubscribed subscribed) Nothing
1533+ else writeIORef (fanSubscribedSubscribers subscribed) $! reducedSubscribers
1534+
1535+{-# INLINE subscribeFanSubscribed #-}
1536+subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed k -> Subscriber a -> IO (SubscriberListTicket a)
1537+subscribeFanSubscribed k subscribed sub = do
1538+ subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1539+ case DMap.lookup k subscribers of
1540+ Nothing -> {-# SCC "missSubscribeFanSubscribed" #-} do
1541+ let !self = (k, subscribed)
1542+ weakSelf <- newIORef =<< mkWeakPtrWithDebug self "FanSubscribed"
1543+ (list, sln) <- WeakBag.singleton sub weakSelf cleanupFanSubscribed
1544+ writeIORef (fanSubscribedSubscribers subscribed) $! DMap.insertWith (error "subscribeEventSubscribed: key that we just failed to find is present - should be impossible") k (FanSubscribedChildren list self weakSelf) subscribers
1545+ return sln
1546+ Just (FanSubscribedChildren list _ weakSelf) -> {-# SCC "hitSubscribeFanSubscribed" #-} WeakBag.insert sub list weakSelf cleanupFanSubscribed
1547+
1548+{-# SPECIALIZE getSwitchSubscribed :: Switch a -> Subscriber a -> EventM x (SubscriberListTicket a, SwitchSubscribed a) #-}
1549+getSwitchSubscribed :: (Defer SomeHoldInit m, Defer SomeAssignment m, Defer SomeMergeInit m, Defer SomeClear m, Defer SomeResetCoincidence m, HasCurrentHeight m, HasSpiderEnv x m) => Switch a -> Subscriber a -> m (SubscriberListTicket a, SwitchSubscribed a)
1550+getSwitchSubscribed s sub = do
9761551 mSubscribed <- liftIO $ readIORef $ switchSubscribed s
9771552 case mSubscribed of
978− Just subscribed -> return subscribed
979− Nothing -> do
1553+ Just subscribed -> {-# SCC "hitSwitch" #-} do
1554+ sln <- liftIO $ subscribeSwitchSubscribed subscribed sub
1555+ return (sln, subscribed)
1556+ Nothing -> {-# SCC "missSwitch" #-} do
9801557 subscribedRef <- liftIO $ newIORef $ error "getSwitchSubscribed: subscribed has not yet been created"
9811558 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
9821559 i <- liftIO $ newInvalidatorSwitch subscribedUnsafe
983− sub <- liftIO $ newSubscriberSwitch subscribedUnsafe
1560+ mySub <- liftIO $ newSubscriberSwitch subscribedUnsafe
9841561 wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorSwitch"
9851562 wiRef <- liftIO $ newIORef wi
986− wsub <- liftIO $ mkWeakPtrWithDebug sub "SubscriberSwitch"
987− selfWeakRef <- liftIO $ newIORef wsub
9881563 parentsRef <- liftIO $ newIORef [] --TODO: This should be unnecessary, because it will always be filled with just the single parent behavior
989− e <- liftIO $ runBehaviorM (readBehaviorTracked (switchParent s)) $ Just (wi, parentsRef)
990− subd <- subscribe e $ WeakSubscriberSimple wsub
991− subdRef <- liftIO $ newIORef subd
992− parentOcc <- liftIO $ getEventSubscribedOcc subd
1564+ holdInits <- getDeferralQueue
1565+ e <- liftIO $ runBehaviorM (readBehaviorTracked (switchParent s)) (Just (wi, parentsRef)) holdInits
1566+ subscription@(EventSubscription _ subd) <- subscribe e mySub
1567+ subscriptionRef <- liftIO $ newIORef subscription
1568+ parentOcc <- liftIO $ readEventSubscribed subd
9931569 occRef <- liftIO $ newIORef parentOcc
9941570 when (isJust parentOcc) $ scheduleClear occRef
9951571 heightRef <- liftIO $ newIORef =<< readIORef (eventSubscribedHeightRef subd)
996− subscribersRef <- liftIO $ newIORef []
997− let subscribed = SwitchSubscribed
998− { switchSubscribedOccurrence = occRef
1572+ weakSelf <- liftIO $ newIORef $ error "getSwitchSubscribed: weakSelf not yet initialized"
1573+ (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupSwitchSubscribed
1574+ let !subscribed = SwitchSubscribed
1575+ { switchSubscribedCachedSubscribed = switchSubscribed s
1576+ , switchSubscribedOccurrence = occRef
9991577 , switchSubscribedHeight = heightRef
1000− , switchSubscribedSubscribers = subscribersRef
1001− , switchSubscribedSelf = sub
1002− , switchSubscribedSelfWeak = selfWeakRef
1578+ , switchSubscribedSubscribers = subs
10031579 , switchSubscribedOwnInvalidator = i
10041580 , switchSubscribedOwnWeakInvalidator = wiRef
10051581 , switchSubscribedBehaviorParents = parentsRef
10061582 , switchSubscribedParent = switchParent s
1007− , switchSubscribedCurrentParent = subdRef
1583+ , switchSubscribedCurrentParent = subscriptionRef
1584+ , switchSubscribedWeakSelf = weakSelf
10081585#ifdef DEBUG_NODEIDS
10091586 , switchSubscribedNodeId = unsafeNodeId s
10101587#endif
10111588 }
1012− liftIO $ writeIORef subscribedRef subscribed
1589+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "switchSubscribedWeakSelf"
1590+ liftIO $ writeIORef subscribedRef $! subscribed
10131591 liftIO $ writeIORef (switchSubscribed s) $ Just subscribed
1014− return subscribed
1592+ return (slnForSub, subscribed)
10151593
1016−getCoincidenceSubscribed :: forall a. Coincidence a -> EventM (CoincidenceSubscribed a)
1017−getCoincidenceSubscribed c = do
1594+cleanupSwitchSubscribed :: SwitchSubscribed a -> IO ()
1595+cleanupSwitchSubscribed subscribed = do
1596+ unsubscribe =<< readIORef (switchSubscribedCurrentParent subscribed)
1597+ finalize =<< readIORef (switchSubscribedOwnWeakInvalidator subscribed) -- We don't need to get invalidated if we're dead
1598+ writeIORef (switchSubscribedCachedSubscribed subscribed) Nothing
1599+
1600+{-# INLINE subscribeSwitchSubscribed #-}
1601+subscribeSwitchSubscribed :: SwitchSubscribed a -> Subscriber a -> IO (SubscriberListTicket a)
1602+subscribeSwitchSubscribed subscribed sub = WeakBag.insert sub (switchSubscribedSubscribers subscribed) (switchSubscribedWeakSelf subscribed) cleanupSwitchSubscribed
1603+
1604+{-# SPECIALIZE getCoincidenceSubscribed :: Coincidence a -> Subscriber a -> EventM x (SubscriberListTicket a, CoincidenceSubscribed a) #-}
1605+getCoincidenceSubscribed :: forall x a m. (Defer SomeAssignment m, Defer SomeHoldInit m, Defer SomeMergeInit m, Defer SomeClear m, HasCurrentHeight m, Defer SomeResetCoincidence m, HasSpiderEnv x m) => Coincidence a -> Subscriber a -> m (SubscriberListTicket a, CoincidenceSubscribed a)
1606+getCoincidenceSubscribed c sub = do
10181607 mSubscribed <- liftIO $ readIORef $ coincidenceSubscribed c
10191608 case mSubscribed of
1020− Just subscribed -> return subscribed
1021− Nothing -> do
1609+ Just subscribed -> {-# SCC "hitCoincidence" #-} do
1610+ sln <- liftIO $ subscribeCoincidenceSubscribed subscribed sub
1611+ return (sln, subscribed)
1612+ Nothing -> {-# SCC "missCoincidence" #-} do
10221613 subscribedRef <- liftIO $ newIORef $ error "getCoincidenceSubscribed: subscribed has not yet been created"
10231614 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
10241615 subOuter <- liftIO $ newSubscriberCoincidenceOuter subscribedUnsafe
1025− wsubOuter <- liftIO $ mkWeakPtrWithDebug subOuter "subOuter"
1026− outerSubd <- subscribe (coincidenceParent c) $ WeakSubscriberSimple wsubOuter
1027− outerOcc <- liftIO $ getEventSubscribedOcc outerSubd
1616+ outerSubscription@(EventSubscription _ outerSubd) <- subscribe (coincidenceParent c) subOuter
1617+ outerOcc <- liftIO $ readEventSubscribed outerSubd
10281618 outerHeight <- liftIO $ readIORef $ eventSubscribedHeightRef outerSubd
10291619 (occ, height, mInnerSubd) <- case outerOcc of
10301620 Nothing -> return (Nothing, outerHeight, Nothing)
@@ -1036,23 +1626,37 @@ getCoincidenceSubscribed c = do
10361626 heightRef <- liftIO $ newIORef height
10371627 innerSubdRef <- liftIO $ newIORef mInnerSubd
10381628 scheduleClear innerSubdRef
1039− subscribersRef <- liftIO $ newIORef []
1629+ weakSelf <- liftIO $ newIORef $ error "getCoincidenceSubscribed: weakSelf not yet implemented"
1630+ (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupCoincidenceSubscribed
10401631 let subscribed = CoincidenceSubscribed
1041− { coincidenceSubscribedOccurrence = occRef
1632+ { coincidenceSubscribedCachedSubscribed = coincidenceSubscribed c
1633+ , coincidenceSubscribedOccurrence = occRef
10421634 , coincidenceSubscribedHeight = heightRef
1043− , coincidenceSubscribedSubscribers = subscribersRef
1635+ , coincidenceSubscribedSubscribers = subs
10441636 , coincidenceSubscribedOuter = subOuter
1045− , coincidenceSubscribedOuterParent = outerSubd
1637+ , coincidenceSubscribedOuterParent = outerSubscription
10461638 , coincidenceSubscribedInnerParent = innerSubdRef
1639+ , coincidenceSubscribedWeakSelf = weakSelf
10471640#ifdef DEBUG_NODEIDS
10481641 , coincidenceSubscribedNodeId = unsafeNodeId c
10491642#endif
10501643 }
1051− liftIO $ writeIORef subscribedRef subscribed
1644+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "CoincidenceSubscribed"
1645+ liftIO $ writeIORef subscribedRef $! subscribed
10521646 liftIO $ writeIORef (coincidenceSubscribed c) $ Just subscribed
1053− return subscribed
1647+ return (slnForSub, subscribed)
1648+
1649+cleanupCoincidenceSubscribed :: CoincidenceSubscribed a -> IO ()
1650+cleanupCoincidenceSubscribed subscribed = do
1651+ unsubscribe $ coincidenceSubscribedOuterParent subscribed
1652+ writeIORef (coincidenceSubscribedCachedSubscribed subscribed) Nothing
1653+
1654+{-# INLINE subscribeCoincidenceSubscribed #-}
1655+subscribeCoincidenceSubscribed :: CoincidenceSubscribed a -> Subscriber a -> IO (SubscriberListTicket a)
1656+subscribeCoincidenceSubscribed subscribed sub = WeakBag.insert sub (coincidenceSubscribedSubscribers subscribed) (coincidenceSubscribedWeakSelf subscribed) cleanupCoincidenceSubscribed
10541657
1055−merge :: GCompare k => DMap k Event -> Event (DMap k Identity)
1658+{-# INLINE merge #-}
1659+merge :: GCompare k => Dynamic R.PatchDMap (DMap k Event) -> Event (DMap k Identity)
10561660merge m = EventMerge $ Merge
10571661 { mergeParents = m
10581662 , mergeSubscribed = unsafeNewIORef m Nothing
@@ -1068,218 +1672,297 @@ fan e =
10681672 }
10691673 in EventSelector $ \k -> EventFan k f
10701674
1675+runHoldInits :: IORef [SomeHoldInit] -> IORef [SomeMergeInit] -> EventM x ()
1676+runHoldInits holdInitRef mergeInitRef = do
1677+ holdInits <- liftIO $ readIORef holdInitRef
1678+ mergeInits <- liftIO $ readIORef mergeInitRef
1679+ unless (null holdInits && null mergeInits) $ do
1680+ liftIO $ writeIORef holdInitRef []
1681+ liftIO $ writeIORef mergeInitRef []
1682+ mapM_ initHold holdInits
1683+ mapM_ initMerge mergeInits
1684+ runHoldInits holdInitRef mergeInitRef
1685+
1686+initHold :: SomeHoldInit -> EventM x ()
1687+initHold (SomeHoldInit h) = void $ getHoldEventSubscription h
1688+
1689+initMerge :: SomeMergeInit -> EventM x ()
1690+initMerge (SomeMergeInit subscribed changed) = do
1691+ changeSub <- liftIO $ newSubscriberMergeChange subscribed
1692+ EventSubscription _ changeSubd <- subscribe changed changeSub
1693+ change <- liftIO $ readEventSubscribed changeSubd
1694+ forM_ change $ \c -> defer $ SomeMergeUpdate c subscribed
1695+ liftIO $ writeIORef (mergeSubscribedChange subscribed) (changeSub, changeSubd)
1696+
10711697-- | Run an event action outside of a frame
1072−runFrame :: EventM a -> IO a
1073−runFrame a = do
1698+runFrame :: EventM x a -> SpiderHost x a --TODO: This function also needs to hold the mutex
1699+runFrame a = SpiderHost $ ask >>= \spiderEnv -> lift $ do
1700+ -- Clear out pending unsubscriptions; these will need to happen eventually anyway, and might cause us a lot of extra work during the frame, so get rid of them now
1701+ pendingCleanups <- atomicModifyIORef (_spiderEnv_cleanups spiderEnv) $ \x -> ([], x)
1702+ {-# SCC "cleanups" #-} sequence_ pendingCleanups
10741703 toAssignRef <- newIORef [] -- This should only actually get used when events are firing
10751704 holdInitRef <- newIORef []
1076− heightRef <- newIORef 0
1705+ mergeUpdateRef <- newIORef []
1706+ mergeInitRef <- newIORef []
1707+ heightRef <- newIORef zeroHeight
10771708 toClearRef <- newIORef []
10781709 toClearRootRef <- newIORef []
10791710 coincidenceInfosRef <- newIORef []
10801711 delayedRef <- liftIO $ newIORef IntMap.empty
1081− result <- flip runEventM (EventEnv toAssignRef holdInitRef toClearRef toClearRootRef heightRef coincidenceInfosRef delayedRef) $ do
1082− result <- a
1083− let runHoldInits = do
1084− holdInits <- liftIO $ readIORef holdInitRef
1085− if null holdInits then return () else do
1086− liftIO $ writeIORef holdInitRef []
1087− forM_ holdInits $ \(SomeHoldInit e h) -> subscribeHold e h
1088− runHoldInits
1089− runHoldInits -- This must happen before doing the assignments, in case subscribing a Hold causes existing Holds to be read by the newly-propagated events
1090− return result
1712+ let env = EventEnv spiderEnv toAssignRef holdInitRef mergeUpdateRef mergeInitRef toClearRef toClearRootRef heightRef coincidenceInfosRef delayedRef
1713+ let go = do
1714+ result <- a
1715+ runHoldInits holdInitRef mergeInitRef -- This must happen before doing the assignments, in case subscribing a Hold causes existing Holds to be read by the newly-propagated events
1716+ return result
1717+ result <- runEventM go env
10911718 toClear <- readIORef toClearRef
1092− forM_ toClear $ \(SomeMaybeIORef ref) -> writeIORef ref Nothing
1719+ forM_ toClear $ \(SomeClear ref) -> {-# SCC "clear" #-} writeIORef ref Nothing
10931720 toClearRoot <- readIORef toClearRootRef
1094− forM_ toClearRoot $ \(SomeDMapIORef ref) -> writeIORef ref DMap.empty
1721+ forM_ toClearRoot $ \(SomeRootClear ref) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
10951722 toAssign <- readIORef toAssignRef
10961723 toReconnectRef <- newIORef []
1097− forM_ toAssign $ \(SomeAssignment h v) -> do
1098− writeIORef (holdValue h) v
1099− writeIORef (holdInvalidators h) =<< invalidate toReconnectRef =<< readIORef (holdInvalidators h)
11001724 coincidenceInfos <- readIORef coincidenceInfosRef
1101− forM_ coincidenceInfos $ \(SomeCoincidenceInfo wsubInner subInner mcs) -> do
1102− touch subInner
1103− finalize wsubInner
1104− mapM_ invalidateCoincidenceHeight mcs
1725+ forM_ toAssign $ \(SomeAssignment vRef iRef v) -> {-# SCC "assignment" #-} do
1726+ writeIORef vRef v
1727+ when debugInvalidate $ putStrLn $ "Invalidating Hold"
1728+ writeIORef iRef =<< evaluate =<< invalidate toReconnectRef =<< readIORef iRef
1729+ mergeUpdates <- readIORef mergeUpdateRef
1730+ writeIORef mergeUpdateRef []
1731+ let updateMerge :: SomeMergeUpdate -> IO [SomeEventSubscription]
1732+ updateMerge (SomeMergeUpdate (R.PatchDMap p :: R.PatchDMap (DMap k Event)) m) = do
1733+ oldParents <- readIORef $ mergeSubscribedParents m
1734+ let f (subscriptionsToKill, ps) (k :=> Compose me) = do
1735+ (mOldSubd, newPs) <- case me of
1736+ Nothing -> return $ DMap.updateLookupWithKey (\_ _ -> Nothing) k ps
1737+ Just e -> do
1738+ s <- liftIO $ newSubscriberMerge k m
1739+ subscription@(EventSubscription _ subd) <- subscribe e s
1740+ let newParent = MergeSubscribedParent subscription s
1741+ newParentHeight <- liftIO $ getEventSubscribedHeight subd
1742+ liftIO $ addMergeHeight newParentHeight m
1743+ return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
1744+ forM_ mOldSubd $ \oldSubd -> do
1745+ oldHeight <- liftIO $ readIORef $ eventSubscribedHeightRef $ _eventSubscription_subscribed $ mergeSubscribedParentSubscription oldSubd
1746+ liftIO $ removeMergeHeight oldHeight m
1747+ return (maybeToList (SomeEventSubscription . mergeSubscribedParentSubscription <$> mOldSubd) ++ subscriptionsToKill, newPs)
1748+ (subscriptionsToKill, newParents) <- flip runEventM env $ foldM f ([], oldParents) $ DMap.toList p --TODO: I think this runEventM is OK, since no events are firing at this time, but it might not be
1749+ writeIORef (mergeSubscribedParents m) $! newParents
1750+ return subscriptionsToKill
1751+ when debugPropagate $ putStrLn "Updating merges"
1752+ mergeSubscriptionsToKill <- concat <$> mapM updateMerge mergeUpdates
1753+ when debugPropagate $ putStrLn "Updating merges done"
11051754 toReconnect <- readIORef toReconnectRef
1106− forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> do
1107− wsub <- readIORef $ switchSubscribedSelfWeak subscribed
1108− finalize wsub
1755+ switchSubscriptionsToKill <- forM toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
1756+ oldSubscription <- readIORef $ switchSubscribedCurrentParent subscribed
11091757 wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
1758+ when debugInvalidate $ putStrLn $ "Finalizing invalidator for Switch" <> showNodeId subscribed
11101759 finalize wi
11111760 i <- evaluate $ switchSubscribedOwnInvalidator subscribed
11121761 wi' <- mkWeakPtrWithDebug i "wi'"
1762+ writeIORef (switchSubscribedOwnWeakInvalidator subscribed) $! wi'
11131763 writeIORef (switchSubscribedBehaviorParents subscribed) []
1114− e <- runBehaviorM (readBehaviorTracked (switchSubscribedParent subscribed)) (Just (wi', switchSubscribedBehaviorParents subscribed))
1764+ writeIORef holdInitRef [] --TODO: Should we reuse this?
1765+ e <- runBehaviorM (readBehaviorTracked (switchSubscribedParent subscribed)) (Just (wi', switchSubscribedBehaviorParents subscribed)) holdInitRef
1766+ runEventM (runHoldInits holdInitRef mergeInitRef) env --TODO: Is this actually OK? It seems like it should be, since we know that no events are firing at this point, but it still seems inelegant
11151767 --TODO: Make sure we touch the pieces of the SwitchSubscribed at the appropriate times
1116− sub <- evaluate $ switchSubscribedSelf subscribed -- Must be done strictly, or the weak pointer will refer to a useless thunk
1117− wsub' <- mkWeakPtrWithDebug sub "wsub'"
1118− writeIORef (switchSubscribedSelfWeak subscribed) wsub'
1119− subd' <- runFrame $ subscribe e $ WeakSubscriberSimple wsub' --TODO: Assert that the event isn't firing --TODO: This should not loop because none of the events should be firing, but still, it is inefficient
1768+ sub <- newSubscriberSwitch subscribed
1769+ subscription <- runReaderT (unSpiderHost (runFrame ({-# SCC "subscribeSwitch" #-} subscribe e sub))) spiderEnv --TODO: Assert that the event isn't firing --TODO: This should not loop because none of the events should be firing, but still, it is inefficient
11201770 {-
1121− stackTrace <- liftIO $ liftM renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
1771+ stackTrace <- liftIO $ fmap renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
11221772 liftIO $ putStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
11231773 EventRoot _ -> "EventRoot"
11241774 EventNever -> "EventNever"
11251775 _ -> "something else"
11261776 -}
1127− writeIORef (switchSubscribedCurrentParent subscribed) subd'
1777+ writeIORef (switchSubscribedCurrentParent subscribed) $! subscription
1778+ return $ SomeEventSubscription oldSubscription
1779+ forM_ mergeSubscriptionsToKill $ \(SomeEventSubscription oldSubscription) -> liftIO $ unsubscribe oldSubscription
1780+ forM_ switchSubscriptionsToKill $ \(SomeEventSubscription oldSubscription) -> liftIO $ unsubscribe oldSubscription
1781+ forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
1782+ EventSubscription _ subd' <- readIORef $ switchSubscribedCurrentParent subscribed
11281783 parentHeight <- readIORef $ eventSubscribedHeightRef subd'
11291784 myHeight <- readIORef $ switchSubscribedHeight subscribed
1130− if parentHeight == myHeight then return () else do
1131− writeIORef (switchSubscribedHeight subscribed) parentHeight
1132− mapM_ invalidateSubscriberHeight =<< readIORef (switchSubscribedSubscribers subscribed)
1133− forM_ coincidenceInfos $ \(SomeCoincidenceInfo _ _ mcs) -> mapM_ recalculateCoincidenceHeight mcs
1785+ when (parentHeight /= myHeight) $ do
1786+ writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
1787+ WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
1788+ forM_ mergeUpdates $ \(SomeMergeUpdate _ m) -> do
1789+ invalidateMergeHeight m --TODO: In addition to when the patch is completely empty, we should also not run this if it has some Nothing values, but none of them have actually had any effect; potentially, we could even check for Just values with no effect (e.g. by comparing their IORefs and ignoring them if they are unchanged); actually, we could just check if the new height is different
1790+ forM_ coincidenceInfos $ \(SomeResetCoincidence subscription mcs) -> do
1791+ unsubscribe subscription
1792+ mapM_ invalidateCoincidenceHeight mcs
1793+ forM_ coincidenceInfos $ \(SomeResetCoincidence _ mcs) -> mapM_ recalculateCoincidenceHeight mcs
1794+ forM_ mergeUpdates $ \(SomeMergeUpdate _ m) -> revalidateMergeHeight m
11341795 forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> do
1135− mapM_ recalculateSubscriberHeight =<< readIORef (switchSubscribedSubscribers subscribed)
1796+ height <- calculateSwitchHeight subscribed
1797+ updateSwitchHeight height subscribed
11361798 return result
11371799
1138−invalidHeight :: Int
1139−invalidHeight = -1000
1140−
1141−invalidateSubscriberHeight :: WeakSubscriber a -> IO ()
1142−invalidateSubscriberHeight ws = do
1143− ms <- deRefWeakSubscriber ws
1144− case ms of
1145− Nothing -> return () --TODO: cleanup?
1146− Just s -> case s of
1147− SubscriberPush _ subscribed -> do
1148− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
1149− mapM_ invalidateSubscriberHeight =<< readIORef (pushSubscribedSubscribers subscribed)
1150− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
1151− SubscriberMerge _ subscribed -> do
1152− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
1153− oldHeight <- readIORef $ mergeSubscribedHeight subscribed
1154− when (oldHeight /= invalidHeight) $ do
1155− writeIORef (mergeSubscribedHeight subscribed) $ invalidHeight
1156− mapM_ invalidateSubscriberHeight =<< readIORef (mergeSubscribedSubscribers subscribed)
1157− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
1158− SubscriberFan subscribed -> do
1159− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
1160− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1161− forM_ (DMap.toList subscribers) $ ((\(FanSubscriberKey _ :=> Identity v) -> mapM_ invalidateSubscriberHeight v) :: DSum (FanSubscriberKey k) Identity -> IO ())
1162− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
1163− SubscriberHold _ -> return ()
1164− SubscriberSwitch subscribed -> do
1165− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
1166− oldHeight <- readIORef $ switchSubscribedHeight subscribed
1167− when (oldHeight /= invalidHeight) $ do
1168− writeIORef (switchSubscribedHeight subscribed) $ invalidHeight
1169− mapM_ invalidateSubscriberHeight =<< readIORef (switchSubscribedSubscribers subscribed)
1170− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
1171− SubscriberCoincidenceOuter subscribed -> do
1172− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
1173− invalidateCoincidenceHeight subscribed
1174− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
1175− SubscriberCoincidenceInner subscribed -> do
1176− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
1177− invalidateCoincidenceHeight subscribed
1178− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
1800+newtype Height = Height { unHeight :: Int } deriving (Show, Read, Eq, Ord, Bounded)
1801+
1802+{-# INLINE zeroHeight #-}
1803+zeroHeight :: Height
1804+zeroHeight = Height 0
1805+
1806+{-# INLINE invalidHeight #-}
1807+invalidHeight :: Height
1808+invalidHeight = Height (-1000)
1809+
1810+-- | An invalid height that is currently being traversed, e.g. by walkInvalidHeightParents
1811+{-# INLINE invalidHeightBeingTraversed #-}
1812+invalidHeightBeingTraversed :: Height
1813+invalidHeightBeingTraversed = Height (-1001)
1814+
1815+{-# INLINE succHeight #-}
1816+succHeight :: Height -> Height
1817+succHeight h@(Height a) =
1818+ if h == invalidHeight
1819+ then invalidHeight
1820+ else Height $ succ a
1821+
1822+invalidateSubscriberHeight :: Height -> Subscriber a -> IO ()
1823+invalidateSubscriberHeight old s = case s of
1824+ SubscriberPush _ subscribed -> do
1825+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
1826+ WeakBag.traverse (pushSubscribedSubscribers subscribed) $ invalidateSubscriberHeight old
1827+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
1828+ SubscriberMerge _ subscribed -> do
1829+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
1830+ removeMergeHeight old subscribed
1831+ invalidateMergeHeight subscribed
1832+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
1833+ SubscriberMergeChange _ -> return () -- Doesn't affect the height of the merge, because its changes are delayed
1834+ SubscriberFan subscribed -> do
1835+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
1836+ subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1837+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
1838+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
1839+ SubscriberHold _ -> return ()
1840+ SubscriberHoldIdentity _ -> return ()
1841+ SubscriberSwitch subscribed -> do
1842+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
1843+ oldHeight <- readIORef $ switchSubscribedHeight subscribed
1844+ when (oldHeight /= invalidHeight) $ do
1845+ writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
1846+ WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1847+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
1848+ SubscriberCoincidenceOuter subscribed -> do
1849+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
1850+ invalidateCoincidenceHeight subscribed
1851+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
1852+ SubscriberCoincidenceInner subscribed -> do
1853+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
1854+ invalidateCoincidenceHeight subscribed
1855+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
1856+ SubscriberHandle -> return ()
1857+
1858+removeMergeHeight :: Height -> MergeSubscribed k -> IO ()
1859+removeMergeHeight oldParentHeight subscribed = do
1860+ when debugInvalidateHeight $ putStrLn $ "removeMergeHeight: " <> show oldParentHeight <> " Merge" <> showNodeId subscribed
1861+ oldHeights <- readIORef $ mergeSubscribedHeightBag subscribed
1862+ let newHeights = heightBagRemove oldParentHeight oldHeights
1863+ writeIORef (mergeSubscribedHeightBag subscribed) $! newHeights
1864+
1865+invalidateMergeHeight :: MergeSubscribed k -> IO ()
1866+invalidateMergeHeight subscribed = do
1867+ oldHeight <- readIORef $ mergeSubscribedHeight subscribed
1868+ -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
1869+ when (oldHeight /= invalidHeight) $ do
1870+ writeIORef (mergeSubscribedHeight subscribed) $! invalidHeight
1871+ WeakBag.traverse (mergeSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1872+
1873+addMergeHeight :: Height -> MergeSubscribed k -> IO ()
1874+addMergeHeight newParentHeight subscribed = do
1875+ when debugInvalidateHeight $ putStrLn $ "addMergeHeight: " <> show newParentHeight <> " Merge" <> showNodeId subscribed
1876+ oldHeights <- readIORef $ mergeSubscribedHeightBag subscribed
1877+ let newHeights = heightBagAdd newParentHeight oldHeights
1878+ writeIORef (mergeSubscribedHeightBag subscribed) $! newHeights
1879+
1880+revalidateMergeHeight :: MergeSubscribed k -> IO ()
1881+revalidateMergeHeight subscribed = do
1882+ currentHeight <- readIORef $ mergeSubscribedHeight subscribed
1883+ when (currentHeight == invalidHeight) $ do -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
1884+ heights <- readIORef $ mergeSubscribedHeightBag subscribed
1885+ parents <- readIORef $ mergeSubscribedParents subscribed
1886+ -- When the number of heights in the bag reaches the number of parents, we should have a valid height
1887+ case heightBagSize heights `compare` DMap.size parents of
1888+ LT -> return ()
1889+ EQ -> do
1890+ let height = succHeight $ heightBagMax heights
1891+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
1892+ writeIORef (mergeSubscribedHeight subscribed) $! height
1893+ WeakBag.traverse (mergeSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
1894+ GT -> error $ "revalidateMergeHeight: more heights than parents for Merge" <> showNodeId subscribed
11791895
11801896invalidateCoincidenceHeight :: CoincidenceSubscribed a -> IO ()
11811897invalidateCoincidenceHeight subscribed = do
11821898 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
11831899 when (oldHeight /= invalidHeight) $ do
1184− writeIORef (coincidenceSubscribedHeight subscribed) $ invalidHeight
1185− mapM_ invalidateSubscriberHeight =<< readIORef (coincidenceSubscribedSubscribers subscribed)
1186−
1187−--TODO: The recalculation algorithm seems a bit funky; make sure it doesn't miss stuff or hit stuff twice; also, it should probably be lazy
1188−
1189−recalculateSubscriberHeight :: WeakSubscriber a -> IO ()
1190−recalculateSubscriberHeight ws = do
1191− ms <- deRefWeakSubscriber ws
1192− case ms of
1193− Nothing -> return () --TODO: cleanup?
1194− Just s -> case s of
1195− SubscriberPush _ subscribed -> do
1196− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
1197− mapM_ recalculateSubscriberHeight =<< readIORef (pushSubscribedSubscribers subscribed)
1198− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
1199− SubscriberMerge _ subscribed -> do
1200− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
1201− oldHeight <- readIORef $ mergeSubscribedHeight subscribed
1202− when (oldHeight == invalidHeight) $ do
1203− height <- calculateMergeHeight subscribed
1204− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
1205− when (height /= invalidHeight) $ do -- If height == invalidHeight, that means some of the prereqs have not yet been recomputed; when they do recompute, they'll catch this node again --TODO: this is O(n*m), where n is the number of children of this noe and m is the number that have been invalidated
1206− writeIORef (mergeSubscribedHeight subscribed) height
1207− mapM_ recalculateSubscriberHeight =<< readIORef (mergeSubscribedSubscribers subscribed)
1208− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
1209− SubscriberFan subscribed -> do
1210− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
1211− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1212− forM_ (DMap.toList subscribers) $ ((\(FanSubscriberKey _ :=> Identity v) -> mapM_ recalculateSubscriberHeight v) :: DSum (FanSubscriberKey k) Identity -> IO ())
1213− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
1214− SubscriberHold _ -> return ()
1215− SubscriberSwitch subscribed -> do
1216− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
1217− oldHeight <- readIORef $ switchSubscribedHeight subscribed
1218− when (oldHeight == invalidHeight) $ do
1219− height <- calculateSwitchHeight subscribed
1220− when (height /= invalidHeight) $ do
1221− writeIORef (switchSubscribedHeight subscribed) height
1222− mapM_ recalculateSubscriberHeight =<< readIORef (switchSubscribedSubscribers subscribed)
1223− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
1224− SubscriberCoincidenceOuter subscribed -> do
1225− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
1226− void $ recalculateCoincidenceHeight subscribed
1227− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
1228− SubscriberCoincidenceInner subscribed -> do
1229− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
1230− void $ recalculateCoincidenceHeight subscribed
1231− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
1900+ writeIORef (coincidenceSubscribedHeight subscribed) $! invalidHeight
1901+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1902+
1903+recalculateSubscriberHeight :: Height -> Subscriber a -> IO ()
1904+recalculateSubscriberHeight new s = case s of
1905+ SubscriberPush _ subscribed -> do
1906+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
1907+ WeakBag.traverse (pushSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
1908+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
1909+ SubscriberMerge _ subscribed -> do
1910+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
1911+ addMergeHeight new subscribed
1912+ revalidateMergeHeight subscribed
1913+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
1914+ SubscriberMergeChange _ -> return ()
1915+ SubscriberFan subscribed -> do
1916+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
1917+ subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1918+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
1919+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
1920+ SubscriberHold _ -> return ()
1921+ SubscriberHoldIdentity _ -> return ()
1922+ SubscriberSwitch subscribed -> do
1923+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
1924+ updateSwitchHeight new subscribed
1925+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
1926+ SubscriberCoincidenceOuter subscribed -> do
1927+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
1928+ recalculateCoincidenceHeight subscribed
1929+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
1930+ SubscriberCoincidenceInner subscribed -> do
1931+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
1932+ recalculateCoincidenceHeight subscribed
1933+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
1934+ SubscriberHandle -> return ()
1935+
1936+updateSwitchHeight :: Height -> SwitchSubscribed a -> IO ()
1937+updateSwitchHeight new subscribed = do
1938+ oldHeight <- readIORef $ switchSubscribedHeight subscribed
1939+ when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
1940+ when (new /= invalidHeight) $ do --TODO: This 'when' should probably be an assertion
1941+ writeIORef (switchSubscribedHeight subscribed) $! new
1942+ WeakBag.traverse (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
12321943
12331944recalculateCoincidenceHeight :: CoincidenceSubscribed a -> IO ()
12341945recalculateCoincidenceHeight subscribed = do
12351946 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
1236− when (oldHeight == invalidHeight) $ do
1947+ when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
12371948 height <- calculateCoincidenceHeight subscribed
12381949 when (height /= invalidHeight) $ do
1239− writeIORef (coincidenceSubscribedHeight subscribed) height
1240− mapM_ recalculateSubscriberHeight =<< readIORef (coincidenceSubscribedSubscribers subscribed) --TODO: This should probably be mandatory, just like with the merge and switch ones
1950+ writeIORef (coincidenceSubscribedHeight subscribed) $! height
1951+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
12411952
1242−calculateMergeHeight :: MergeSubscribed k -> IO Int
1243−calculateMergeHeight subscribed = if DMap.null (mergeSubscribedParents subscribed) then return 0 else do
1244− heights <- forM (DMap.toList $ mergeSubscribedParents subscribed) $ \(_ :=> es) -> do
1245− readIORef $ eventSubscribedHeightRef es
1246− return $ if any (== invalidHeight) heights then invalidHeight else succ $ Prelude.maximum heights --TODO: Replace 'any' with invalidHeight-preserving 'maximum'
1953+getEventSubscribedHeight :: EventSubscribed a -> IO Height
1954+getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
12471955
1248−calculateSwitchHeight :: SwitchSubscribed a -> IO Int
1249−calculateSwitchHeight subscribed = readIORef . eventSubscribedHeightRef =<< readIORef (switchSubscribedCurrentParent subscribed)
1956+calculateSwitchHeight :: SwitchSubscribed a -> IO Height
1957+calculateSwitchHeight subscribed = readIORef . eventSubscribedHeightRef . _eventSubscription_subscribed =<< readIORef (switchSubscribedCurrentParent subscribed)
12501958
1251−calculateCoincidenceHeight :: CoincidenceSubscribed a -> IO Int
1959+calculateCoincidenceHeight :: CoincidenceSubscribed a -> IO Height
12521960calculateCoincidenceHeight subscribed = do
1253− outerHeight <- readIORef $ eventSubscribedHeightRef $ coincidenceSubscribedOuterParent subscribed
1254− innerHeight <- maybe (return 0) (readIORef . eventSubscribedHeightRef) =<< readIORef (coincidenceSubscribedInnerParent subscribed)
1961+ outerHeight <- readIORef $ eventSubscribedHeightRef $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
1962+ innerHeight <- maybe (return zeroHeight) (readIORef . eventSubscribedHeightRef) =<< readIORef (coincidenceSubscribedInnerParent subscribed)
12551963 return $ if outerHeight == invalidHeight || innerHeight == invalidHeight then invalidHeight else max outerHeight innerHeight
12561964
1257−{-
1258−recalculateEventSubscribedHeight :: EventSubscribed a -> IO Int
1259−recalculateEventSubscribedHeight es = case es of
1260− EventSubscribedRoot _ -> return 0
1261− EventSubscribedNever -> return 0
1262− EventSubscribedPush subscribed -> recalculateEventSubscribedHeight $ pushSubscribedParent subscribed
1263− EventSubscribedMerge subscribed -> do
1264− oldHeight <- readIORef $ mergeSubscribedHeight subscribed
1265− if oldHeight /= invalidHeight then return oldHeight else do
1266− height <- calculateMergeHeight subscribed
1267− writeIORef (mergeSubscribedHeight subscribed) height
1268− return height
1269− EventSubscribedFan _ subscribed -> recalculateEventSubscribedHeight $ fanSubscribedParent subscribed
1270− EventSubscribedSwitch subscribed -> do
1271− oldHeight <- readIORef $ switchSubscribedHeight subscribed
1272− if oldHeight /= invalidHeight then return oldHeight else do
1273− height <- calculateSwitchHeight subscribed
1274− writeIORef (switchSubscribedHeight subscribed) height
1275− return height
1276− EventSubscribedCoincidence subscribed -> recalculateCoincidenceHeight subscribed
1277−-}
1278−
1279−data SomeSwitchSubscribed = forall a. SomeSwitchSubscribed (SwitchSubscribed a)
1280−
1281−debugInvalidate :: Bool
1282−debugInvalidate = False
1965+data SomeSwitchSubscribed = forall a. SomeSwitchSubscribed {-# NOUNPACK #-} (SwitchSubscribed a)
12831966
12841967invalidate :: IORef [SomeSwitchSubscribed] -> WeakList Invalidator -> IO (WeakList Invalidator)
12851968invalidate toReconnectRef wis = do
@@ -1287,19 +1970,19 @@ invalidate toReconnectRef wis = do
12871970 mi <- deRefWeak wi
12881971 case mi of
12891972 Nothing -> do
1290− when debugInvalidate $ liftIO $ putStrLn "invalidate Dead"
1973+ traceInvalidate "invalidate Dead"
12911974 return () --TODO: Should we clean this up here?
12921975 Just i -> do
12931976 finalize wi -- Once something's invalidated, it doesn't need to hang around; this will change when some things are strict
12941977 case i of
12951978 InvalidatorPull p -> do
1296− when debugInvalidate $ liftIO $ putStrLn "invalidate Pull"
1979+ traceInvalidate $ "invalidate: Pull" <> showNodeId p
12971980 mVal <- readIORef $ pullValue p
12981981 forM_ mVal $ \val -> do
12991982 writeIORef (pullValue p) Nothing
1300− writeIORef (pullSubscribedInvalidators val) =<< invalidate toReconnectRef =<< readIORef (pullSubscribedInvalidators val)
1983+ writeIORef (pullSubscribedInvalidators val) =<< evaluate =<< invalidate toReconnectRef =<< readIORef (pullSubscribedInvalidators val)
13011984 InvalidatorSwitch subscribed -> do
1302− when debugInvalidate $ liftIO $ putStrLn "invalidate Switch"
1985+ traceInvalidate $ "invalidate: Switch" <> showNodeId subscribed
13031986 modifyIORef' toReconnectRef (SomeSwitchSubscribed subscribed :)
13041987 return [] -- Since we always finalize everything, always return an empty list --TODO: There are some things that will need to be re-subscribed every time; we should try to avoid finalizing them
13051988
@@ -1307,83 +1990,228 @@ invalidate toReconnectRef wis = do
13071990-- Reflex integration
13081991--------------------------------------------------------------------------------
13091992
1310−data Spider
1311−
1312−instance R.Reflex Spider where
1313− newtype Behavior Spider a = SpiderBehavior { unSpiderBehavior :: Behavior a }
1314− newtype Event Spider a = SpiderEvent { unSpiderEvent :: Event a }
1315− type PullM Spider = BehaviorM
1316− type PushM Spider = EventM
1317− {-# INLINE never #-}
1318− {-# INLINE constant #-}
1319− never = SpiderEvent EventNever
1320− constant = SpiderBehavior . BehaviorConst
1321− push f = SpiderEvent. push f . unSpiderEvent
1322− pull = SpiderBehavior . pull
1323− merge = SpiderEvent . merge . (unsafeCoerce :: DMap k (R.Event Spider) -> DMap k Event)
1324− fan e = R.EventSelector $ SpiderEvent . select (fan (unSpiderEvent e))
1325− switch = SpiderEvent . switch . (unsafeCoerce :: Behavior (R.Event Spider a) -> Behavior (Event a)) . unSpiderBehavior
1326− coincidence = SpiderEvent . coincidence . (unsafeCoerce :: Event (R.Event Spider a) -> Event (Event a)) . unSpiderEvent
1993+-- | The default, global Spider environment
1994+type Spider = SpiderEnv Global
13271995
1328−instance R.MonadSample Spider SpiderHost where
1329− {-# INLINE sample #-}
1330− sample = SpiderHost . readBehavior . unSpiderBehavior
1996+-- | Designates the default, global Spider timeline
1997+data Global
13311998
1332−instance R.MonadHold Spider SpiderHost where
1333− hold v0 = SpiderHost . liftM SpiderBehavior . runFrame . hold v0 . unSpiderEvent
1999+{-# NOINLINE globalSpiderEnv #-}
2000+globalSpiderEnv :: SpiderEnv Global
2001+globalSpiderEnv = unsafePerformIO unsafeNewSpiderEnv
13342002
1335−instance R.MonadSample Spider BehaviorM where
1336− {-# INLINE sample #-}
1337− sample = readBehaviorTracked . unSpiderBehavior
2003+-- | Stores all global data relevant to a particular Spider timeline; only one
2004+-- value should exist for each type @x@
2005+data SpiderEnv x = SpiderEnv
2006+ { _spiderEnv_toUnsubscribe :: !(IORef [SomeEventSubscription])
2007+ , _spiderEnv_lock :: !(MVar ())
2008+ , _spiderEnv_cleanups :: !(IORef [IO ()])
2009+#ifdef DEBUG
2010+ , _spiderEnv_depth :: !(IORef Int)
2011+#endif
2012+ }
2013+type role SpiderEnv nominal
2014+
2015+instance GEq SpiderEnv where
2016+ a `geq` b = if _spiderEnv_toUnsubscribe a == _spiderEnv_toUnsubscribe b
2017+ then Just $ unsafeCoerce Refl -- This unsafeCoerce is safe because the same SpiderEnv can't have two different 'x' arguments
2018+ else Nothing
2019+
2020+unsafeNewSpiderEnv :: forall x. IO (SpiderEnv x)
2021+unsafeNewSpiderEnv = do
2022+ toUnsubscribe <- newIORef []
2023+ lock <- newMVar ()
2024+ cleanups <- newIORef []
2025+#ifdef DEBUG
2026+ depthRef <- newIORef 0
2027+#endif
2028+ return $ SpiderEnv
2029+ { _spiderEnv_toUnsubscribe = toUnsubscribe
2030+ , _spiderEnv_lock = lock
2031+ , _spiderEnv_cleanups = cleanups
2032+#ifdef DEBUG
2033+ , _spiderEnv_depth = depthRef
2034+#endif
2035+ }
13382036
1339−instance R.MonadSample Spider EventM where
1340− {-# INLINE sample #-}
1341− sample = liftIO . readBehavior . unSpiderBehavior
2037+-- | Create a new SpiderEnv
2038+newSpiderEnv :: IO (Some SpiderEnv)
2039+newSpiderEnv = Some.This <$> unsafeNewSpiderEnv
13422040
1343−instance R.MonadHold Spider EventM where
1344− {-# INLINE hold #-}
1345− hold v0 e = SpiderBehavior <$> hold v0 (unSpiderEvent e)
2041+newtype SpiderPullM x a = SpiderPullM (BehaviorM a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
13462042
1347−data RootTrigger a = forall k. GCompare k => RootTrigger (IORef [WeakSubscriber a], IORef (DMap k Identity), k a)
1348−newtype SpiderEventHandle a = SpiderEventHandle { unEventHandle :: Event a }
2043+newtype SpiderPushM x a = SpiderPushM (ComputeM a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
13492044
1350−instance R.MonadSubscribeEvent Spider SpiderHostFrame where
2045+instance R.Reflex (SpiderEnv x) where
2046+ newtype Behavior (SpiderEnv x) a = SpiderBehavior { unSpiderBehavior :: Behavior a }
2047+ newtype Event (SpiderEnv x) a = SpiderEvent { unSpiderEvent :: Event a }
2048+ newtype Dynamic (SpiderEnv x) a = SpiderDynamic { unSpiderDynamic :: Dynamic Identity a } deriving (Functor, Applicative, Monad)
2049+ newtype Incremental (SpiderEnv x) p a = SpiderIncremental { unSpiderIncremental :: Dynamic p a }
2050+ type PullM (SpiderEnv x) = SpiderPullM x
2051+ type PushM (SpiderEnv x) = SpiderPushM x
2052+ {-# INLINABLE never #-}
2053+ never = SpiderEvent EventNever
2054+ {-# INLINABLE constant #-}
2055+ constant = SpiderBehavior . BehaviorConst
2056+ {-# INLINABLE push #-}
2057+ push f = SpiderEvent . push (coerce f) . unSpiderEvent
2058+ {-# INLINABLE pull #-}
2059+ pull = SpiderBehavior . pull . coerce
2060+ {-# INLINABLE merge #-}
2061+ merge = SpiderEvent . merge . DynamicConst . (unsafeCoerce :: DMap k (R.Event (SpiderEnv x)) -> DMap k Event)
2062+ {-# INLINABLE fan #-}
2063+ fan e = R.EventSelector $ SpiderEvent . select (fan (unSpiderEvent e))
2064+ {-# INLINABLE switch #-}
2065+ switch = SpiderEvent . switch . (unsafeCoerce :: Behavior (R.Event (SpiderEnv x) a) -> Behavior (Event a)) . unSpiderBehavior
2066+ {-# INLINABLE coincidence #-}
2067+ coincidence = SpiderEvent . coincidence . (unsafeCoerce :: Event (R.Event (SpiderEnv x) a) -> Event (Event a)) . unSpiderEvent
2068+ {-# INLINABLE current #-}
2069+ current = SpiderBehavior . current . unSpiderDynamic
2070+ {-# INLINABLE updated #-}
2071+ updated = SpiderEvent . fmap runIdentity . updated . unSpiderDynamic
2072+ {-# INLINABLE unsafeBuildDynamic #-}
2073+ unsafeBuildDynamic readV0 v' = SpiderDynamic $ DynamicDynIdentity $ unsafeDyn (coerce readV0) $ addIdentity $ unSpiderEvent v'
2074+ {-# INLINABLE unsafeBuildIncremental #-}
2075+ unsafeBuildIncremental readV0 dv = SpiderIncremental $ DynamicDyn $ unsafeDyn (coerce readV0) $ unSpiderEvent dv
2076+ {-# INLINABLE mergeIncremental #-}
2077+ mergeIncremental = SpiderEvent . merge . (unsafeCoerce :: Dynamic R.PatchDMap (DMap k (R.Event (SpiderEnv x))) -> Dynamic R.PatchDMap (DMap k Event)) . unSpiderIncremental
2078+ {-# INLINABLE currentIncremental #-}
2079+ currentIncremental = SpiderBehavior . current . unSpiderIncremental
2080+ {-# INLINABLE updatedIncremental #-}
2081+ updatedIncremental = SpiderEvent . updated . unSpiderIncremental
2082+ {-# INLINABLE incrementalToDynamic #-}
2083+ incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ DynamicDynIdentity $ unsafeDyn (readBehaviorUntracked $ current i) $ flip push (updated i) $ \p -> do
2084+ c <- readBehaviorUntracked $ current i
2085+ return $ Identity <$> R.apply p c --TODO: Avoid the redundant 'apply'
2086+
2087+instance R.MonadSample (SpiderEnv x) (EventM x) where
2088+ {-# INLINABLE sample #-}
2089+ sample (SpiderBehavior b) = readBehaviorUntracked b
2090+
2091+instance R.MonadHold (SpiderEnv x) (EventM x) where
2092+ {-# INLINABLE hold #-}
2093+ hold = holdSpiderEventM
2094+ {-# INLINABLE holdDyn #-}
2095+ holdDyn = holdDynSpiderEventM
2096+ {-# INLINABLE holdIncremental #-}
2097+ holdIncremental = holdIncrementalSpiderEventM
2098+
2099+holdSpiderEventM :: a -> R.Event (SpiderEnv x) a -> EventM x (R.Behavior (SpiderEnv x) a)
2100+holdSpiderEventM v0 e = fmap (SpiderBehavior . BehaviorHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2101+
2102+holdDynSpiderEventM :: a -> R.Event (SpiderEnv x) a -> EventM x (R.Dynamic (SpiderEnv x) a)
2103+holdDynSpiderEventM v0 e = fmap (SpiderDynamic . DynamicHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2104+
2105+holdIncrementalSpiderEventM :: R.Patch p => a -> R.Event (SpiderEnv x) (p a) -> EventM x (R.Incremental (SpiderEnv x) p a)
2106+holdIncrementalSpiderEventM v0 e = fmap (SpiderIncremental . DynamicHold) $ hold v0 $ unSpiderEvent e
2107+
2108+instance R.MonadHold (SpiderEnv x) (SpiderHost x) where
2109+ {-# INLINABLE hold #-}
2110+ hold v0 e = R.runHostFrame $ R.hold v0 e
2111+ {-# INLINABLE holdDyn #-}
2112+ holdDyn v0 e = R.runHostFrame $ R.holdDyn v0 e
2113+ {-# INLINABLE holdIncremental #-}
2114+ holdIncremental v0 e = R.runHostFrame $ R.holdIncremental v0 e
2115+
2116+instance R.MonadSample (SpiderEnv x) (SpiderHost x) where
2117+ {-# INLINABLE sample #-}
2118+ sample = runFrame . readBehaviorUntracked . unSpiderBehavior
2119+
2120+instance R.MonadSample (SpiderEnv x) (SpiderPullM x) where
2121+ {-# INLINABLE sample #-}
2122+ sample = coerce . readBehaviorTracked . unSpiderBehavior
2123+
2124+instance R.MonadSample (SpiderEnv x) (SpiderPushM x) where
2125+ {-# INLINABLE sample #-}
2126+ sample (SpiderBehavior b) = SpiderPushM $ readBehaviorUntracked b
2127+
2128+instance R.MonadHold (SpiderEnv x) (SpiderPushM x) where
2129+ {-# INLINABLE hold #-}
2130+ hold v0 e = R.current <$> R.holdDyn v0 e
2131+ {-# INLINABLE holdDyn #-}
2132+ holdDyn v0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . DynamicHoldIdentity) $ hold v0 $ addIdentity e
2133+ {-# INLINABLE holdIncremental #-}
2134+ holdIncremental v0 (SpiderEvent e) = SpiderPushM $ SpiderIncremental . DynamicHold <$> hold v0 e
2135+
2136+data RootTrigger a = forall k. GCompare k => RootTrigger (SubscriberList a, IORef (DMap k Identity), k a)
2137+newtype SpiderEventHandle a = SpiderEventHandle { unSpiderEventHandle :: EventSubscription a }
2138+
2139+instance R.MonadSubscribeEvent (SpiderEnv x) (SpiderHostFrame x) where
2140+ {-# INLINABLE subscribeEvent #-}
13512141 subscribeEvent e = SpiderHostFrame $ do
1352− _ <- getEventSubscribed $ unSpiderEvent e --TODO: The result of this should actually be used
1353− return $ SpiderEventHandle (unSpiderEvent e)
1354−
1355−instance R.ReflexHost Spider where
1356− type EventTrigger Spider = RootTrigger
1357− type EventHandle Spider = SpiderEventHandle
1358− type HostFrame Spider = SpiderHostFrame
1359−
1360−instance R.MonadReadEvent Spider ReadPhase where
1361− {-# INLINE readEvent #-}
1362− readEvent = ReadPhase . liftM (fmap return) . readEvent . unEventHandle
1363−
1364−instance MonadRef EventM where
1365− type Ref EventM = Ref IO
1366− {-# INLINE newRef #-}
1367− {-# INLINE readRef #-}
1368− {-# INLINE writeRef #-}
2142+ subscription <- subscribe (unSpiderEvent e) SubscriberHandle --TODO: Unsubscribe eventually (manually and/or with weak ref)
2143+ return $ SpiderEventHandle subscription
2144+
2145+instance R.ReflexHost (SpiderEnv x) where
2146+ type EventTrigger (SpiderEnv x) = RootTrigger
2147+ type EventHandle (SpiderEnv x) = SpiderEventHandle
2148+ type HostFrame (SpiderEnv x) = SpiderHostFrame x
2149+
2150+instance R.MonadReadEvent (SpiderEnv x) (ReadPhase x) where
2151+ {-# INLINABLE readEvent #-}
2152+ readEvent h = ReadPhase $ fmap (fmap return) $ liftIO $ do
2153+ let EventSubscription sln subscribed = unSpiderEventHandle h
2154+ result <- readEventSubscribed subscribed
2155+ touch sln
2156+ return result
2157+
2158+instance MonadRef (EventM x) where
2159+ type Ref (EventM x) = Ref IO
2160+ {-# INLINABLE newRef #-}
2161+ {-# INLINABLE readRef #-}
2162+ {-# INLINABLE writeRef #-}
13692163 newRef = liftIO . newRef
13702164 readRef = liftIO . readRef
13712165 writeRef r a = liftIO $ writeRef r a
13722166
1373−instance MonadAtomicRef EventM where
1374− {-# INLINE atomicModifyRef #-}
2167+instance MonadAtomicRef (EventM x) where
2168+ {-# INLINABLE atomicModifyRef #-}
13752169 atomicModifyRef r f = liftIO $ atomicModifyRef r f
13762170
1377−newtype SpiderHost a = SpiderHost { runSpiderHost :: IO a } deriving (Functor, Applicative, Monad, MonadFix, MonadIO, MonadException, MonadAsyncException)
1378−
1379−newtype SpiderHostFrame a = SpiderHostFrame { runSpiderHostFrame :: EventM a } deriving (Functor, Applicative, Monad, MonadFix, MonadIO, MonadException, MonadAsyncException)
1380−
1381−instance R.MonadSample Spider SpiderHostFrame where
1382− sample = SpiderHostFrame . R.sample --TODO: This can cause problems with laziness, so we should get rid of it if we can
1383−
1384−instance R.MonadHold Spider SpiderHostFrame where
1385− {-# INLINE hold #-}
1386− hold v0 e = SpiderHostFrame $ R.hold v0 e
2171+-- | The monad for actions that manipulate a Spider timeline identified by @x@
2172+newtype SpiderHost x a = SpiderHost { unSpiderHost :: ReaderT (SpiderEnv x) IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2173+
2174+instance Monad (SpiderHost x) where
2175+ {-# INLINABLE (>>=) #-}
2176+ SpiderHost x >>= f = SpiderHost $ x >>= unSpiderHost . f
2177+ {-# INLINABLE (>>) #-}
2178+ SpiderHost x >> SpiderHost y = SpiderHost $ x >> y
2179+ {-# INLINABLE return #-}
2180+ return x = SpiderHost $ return x
2181+ {-# INLINABLE fail #-}
2182+ fail s = SpiderHost $ fail s
2183+
2184+-- | Run an action affecting the global Spider timeline; this will be guarded by
2185+-- a mutex for that timeline
2186+runSpiderHost :: SpiderHost Global a -> IO a
2187+runSpiderHost (SpiderHost a) = runReaderT a globalSpiderEnv
2188+
2189+newtype SpiderHostFrame x a = SpiderHostFrame { runSpiderHostFrame :: EventM x a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2190+
2191+instance Monad (SpiderHostFrame x) where
2192+ {-# INLINABLE (>>=) #-}
2193+ SpiderHostFrame x >>= f = SpiderHostFrame $ x >>= runSpiderHostFrame . f
2194+ {-# INLINABLE (>>) #-}
2195+ SpiderHostFrame x >> SpiderHostFrame y = SpiderHostFrame $ x >> y
2196+ {-# INLINABLE return #-}
2197+ return x = SpiderHostFrame $ return x
2198+ {-# INLINABLE fail #-}
2199+ fail s = SpiderHostFrame $ fail s
2200+
2201+instance R.MonadSample (SpiderEnv x) (SpiderHostFrame x) where
2202+ sample = SpiderHostFrame . readBehaviorUntracked . unSpiderBehavior --TODO: This can cause problems with laziness, so we should get rid of it if we can
2203+
2204+addIdentity :: Event a -> Event (Identity a)
2205+--addIdentity = fmap Identity
2206+addIdentity = unsafeCoerce
2207+
2208+instance R.MonadHold (SpiderEnv x) (SpiderHostFrame x) where
2209+ {-# INLINABLE hold #-}
2210+ hold v0 e = SpiderHostFrame $ fmap (SpiderBehavior . BehaviorHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2211+ {-# INLINABLE holdDyn #-}
2212+ holdDyn v0 e = SpiderHostFrame $ fmap (SpiderDynamic . DynamicHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2213+ {-# INLINABLE holdIncremental #-}
2214+ holdIncremental v0 e = SpiderHostFrame $ fmap (SpiderIncremental . DynamicHold) $ hold v0 $ unSpiderEvent e
13872215
13882216newEventWithTriggerIO :: forall a. (RootTrigger a -> IO (IO ())) -> IO (Event a)
13892217newEventWithTriggerIO f = do
@@ -1401,44 +2229,60 @@ newFanEventWithTriggerIO f = do
14012229 }
14022230 return $ EventSelector $ \k -> EventRoot k r
14032231
1404−instance R.MonadReflexCreateTrigger Spider SpiderHost where
1405− newEventWithTrigger = SpiderHost . liftM SpiderEvent . newEventWithTriggerIO
1406− newFanEventWithTrigger f = SpiderHost $ do
2232+instance R.MonadReflexCreateTrigger (SpiderEnv x) (SpiderHost x) where
2233+ newEventWithTrigger = SpiderHost . lift . fmap SpiderEvent . newEventWithTriggerIO
2234+ newFanEventWithTrigger f = SpiderHost $ lift $ do
14072235 es <- newFanEventWithTriggerIO f
14082236 return $ R.EventSelector $ SpiderEvent . select es
14092237
1410−instance R.MonadReflexCreateTrigger Spider SpiderHostFrame where
1411− newEventWithTrigger = SpiderHostFrame . EventM . liftIO . liftM SpiderEvent . newEventWithTriggerIO
2238+instance R.MonadReflexCreateTrigger (SpiderEnv x) (SpiderHostFrame x) where
2239+ newEventWithTrigger = SpiderHostFrame . EventM . liftIO . fmap SpiderEvent . newEventWithTriggerIO
14122240 newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
14132241 es <- newFanEventWithTriggerIO f
14142242 return $ R.EventSelector $ SpiderEvent . select es
14152243
1416−instance R.MonadSubscribeEvent Spider SpiderHost where
1417− subscribeEvent e = SpiderHost $ do
1418− _ <- runFrame $ getEventSubscribed $ unSpiderEvent e --TODO: The result of this should actually be used
1419− return $ SpiderEventHandle (unSpiderEvent e)
2244+instance R.MonadSubscribeEvent (SpiderEnv x) (SpiderHost x) where
2245+ {-# INLINABLE subscribeEvent #-}
2246+ subscribeEvent = subscribeEventSpiderHost
2247+
2248+subscribeEventSpiderHost :: R.Event (SpiderEnv x) a -> SpiderHost x (R.EventHandle (SpiderEnv x) a)
2249+subscribeEventSpiderHost e = do
2250+ subscription <- runFrame $ subscribe (unSpiderEvent e) SubscriberHandle --TODO: Unsubscribe eventually (manually and/or with weak ref)
2251+ return $ SpiderEventHandle subscription
2252+
2253+newtype ReadPhase x a = ReadPhase (ResultM x a) deriving (Functor, Applicative, Monad, MonadFix)
2254+
2255+instance R.MonadSample (SpiderEnv x) (ReadPhase x) where
2256+ {-# INLINABLE sample #-}
2257+ sample = ReadPhase . R.sample
14202258
1421−newtype ReadPhase a = ReadPhase { runReadPhase :: ResultM a } deriving (Functor, Applicative, Monad, MonadFix, R.MonadSample Spider, R.MonadHold Spider)
2259+instance R.MonadHold (SpiderEnv x) (ReadPhase x) where
2260+ {-# INLINABLE hold #-}
2261+ hold v0 e = ReadPhase $ R.hold v0 e
2262+ {-# INLINABLE holdDyn #-}
2263+ holdDyn v0 e = ReadPhase $ R.holdDyn v0 e
2264+ {-# INLINABLE holdIncremental #-}
2265+ holdIncremental v0 e = ReadPhase $ R.holdIncremental v0 e
14222266
1423−instance R.MonadReflexHost Spider SpiderHost where
1424− type ReadPhase SpiderHost = ReadPhase
1425− fireEventsAndRead es (ReadPhase a) = SpiderHost $ run es a
1426− runHostFrame = SpiderHost . runFrame . runSpiderHostFrame
2267+instance R.MonadReflexHost (SpiderEnv x) (SpiderHost x) where
2268+ type ReadPhase (SpiderHost x) = ReadPhase x
2269+ fireEventsAndRead es (ReadPhase a) = run es a
2270+ runHostFrame = runFrame . runSpiderHostFrame
14272271
1428−instance MonadRef SpiderHost where
1429− type Ref SpiderHost = Ref IO
2272+instance MonadRef (SpiderHost x) where
2273+ type Ref (SpiderHost x) = Ref IO
14302274 newRef = SpiderHost . newRef
14312275 readRef = SpiderHost . readRef
14322276 writeRef r = SpiderHost . writeRef r
14332277
1434−instance MonadAtomicRef SpiderHost where
2278+instance MonadAtomicRef (SpiderHost x) where
14352279 atomicModifyRef r = SpiderHost . atomicModifyRef r
14362280
1437−instance MonadRef SpiderHostFrame where
1438− type Ref SpiderHostFrame = Ref IO
2281+instance MonadRef (SpiderHostFrame x) where
2282+ type Ref (SpiderHostFrame x) = Ref IO
14392283 newRef = SpiderHostFrame . newRef
14402284 readRef = SpiderHostFrame . readRef
14412285 writeRef r = SpiderHostFrame . writeRef r
14422286
1443−instance MonadAtomicRef SpiderHostFrame where
2287+instance MonadAtomicRef (SpiderHostFrame x) where
14442288 atomicModifyRef r = SpiderHostFrame . atomicModifyRef r