@@ -9,75 +9,125 @@
99{-# LANGUAGE GADTs #-}
1010{-# LANGUAGE GeneralizedNewtypeDeriving #-}
1111{-# LANGUAGE LambdaCase #-}
12−{-# LANGUAGE MagicHash #-}
13−{-# LANGUAGE MultiParamTypeClasses #-}
14−{-# LANGUAGE MultiWayIf #-}
1512{-# LANGUAGE RankNTypes #-}
1613{-# LANGUAGE RoleAnnotations #-}
1714{-# LANGUAGE ScopedTypeVariables #-}
1815{-# LANGUAGE TypeFamilies #-}
1916{-# LANGUAGE TypeOperators #-}
2017{-# LANGUAGE UndecidableInstances #-}
18+{-# LANGUAGE PolyKinds #-}
19+{-# LANGUAGE DeriveFunctor #-}
20+{-# LANGUAGE StandaloneDeriving #-}
21+{-# LANGUAGE InstanceSigs #-}
22+{-# LANGUAGE MultiWayIf #-}
23+
24+#ifdef USE_REFLEX_OPTIMIZER
25+{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
26+#endif
27+{-# OPTIONS_GHC -Wunused-binds #-}
2128-- | This module is the implementation of the 'Spider' 'Reflex' engine. It uses
2229-- 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
30+module Reflex.Spider.Internal (module Reflex.Spider.Internal) where
31+
32+#if MIN_VERSION_base(4,10,0)
33+import Control.Applicative (liftA2)
34+#endif
3435import Control.Concurrent
3536import Control.Exception
36−import Control.Monad hiding (forM, forM_, mapM, mapM_, sequence)
37+import Control.Monad hiding (forM, forM_, mapM, mapM_)
3738import Control.Monad.Exception
38−import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_, sequence)
39+import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_)
3940import Control.Monad.Primitive
40−import Control.Monad.Reader hiding (forM, forM_, mapM, mapM_, sequence)
41+import Control.Monad.Reader.Class
42+import Control.Monad.IO.Class
43+import Control.Monad.ReaderIO
4144import Control.Monad.Ref
42−import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
45+import Control.Monad.Fail (MonadFail)
46+import qualified Control.Monad.Fail as MonadFail
4347import Data.Align
4448import Data.Coerce
45−import Data.Dependent.Map (DMap, DSum (..))
49+import Data.Dependent.Map (DMap)
4650import qualified Data.Dependent.Map as DMap
51+import Data.Dependent.Sum (DSum (..))
52+import Data.FastMutableIntMap (FastMutableIntMap, PatchIntMap (..))
53+import qualified Data.FastMutableIntMap as FastMutableIntMap
4754import Data.Foldable hiding (concat, elem, sequence_)
48−import Data.Function
49−import Data.Functor.Compose
55+import Data.Functor.Constant
56+import Data.Functor.Misc
57+import Data.Functor.Product
5058import Data.GADT.Compare
5159import Data.IntMap.Strict (IntMap)
5260import qualified Data.IntMap.Strict as IntMap
5361import Data.IORef
54−import Data.List hiding (foldl')
55−import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
56−import qualified Data.List.NonEmpty as NonEmpty
57−import Data.Maybe
62+import Data.Kind (Type)
63+import Data.Maybe hiding (mapMaybe)
5864import Data.Monoid (mempty, (<>))
59−import Data.Some (Some)
60−import qualified Data.Some as Some
65+import Data.Proxy
6166import Data.These
6267import Data.Traversable
63−import Data.Tree (Forest, Tree (..), drawForest)
64−import Data.Word
68+import Data.Type.Equality ((:~:)(Refl))
69+import Data.Witherable (Filterable, mapMaybe)
70+import GHC.Exts hiding (toList)
6571import GHC.IORef (IORef (..))
6672import GHC.Stack
73+import Reflex.FastWeak
6774import System.IO.Unsafe
6875import System.Mem.Weak
6976import Unsafe.Coerce
7077
71−import Data.WeakBag (WeakBag, WeakBagTicket)
78+#ifdef MIN_VERSION_semialign
79+#if MIN_VERSION_these(0,8,0)
80+import Data.These.Combinators (justThese)
81+#endif
82+#if MIN_VERSION_semialign(1,1,0)
83+import Data.Zip (Zip (..))
84+#endif
85+#endif
86+
87+#ifdef DEBUG_CYCLES
88+import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
89+#endif
90+
91+import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
92+import qualified Data.List.NonEmpty as NonEmpty
93+import Data.Tree (Forest, Tree (..), drawForest)
94+import Data.List (isPrefixOf)
95+
96+import Data.FastWeakBag (FastWeakBag, FastWeakBagTicket)
97+import qualified Data.FastWeakBag as FastWeakBag
98+
99+import Data.Reflection
100+import Data.Some (Some(Some))
101+import Data.Type.Coercion
102+import Data.Profunctor.Unsafe ((#.), (.#))
103+import Data.WeakBag (WeakBag, WeakBagTicket, _weakBag_children)
72104import qualified Data.WeakBag as WeakBag
105+import qualified Reflex.Class
73106import qualified Reflex.Class as R
74−import qualified Reflex.Host.Class as R
107+import qualified Reflex.Host.Class
108+import Reflex.NotReady.Class
109+import Data.Patch
110+import qualified Data.Patch.DMapWithMove as PatchDMapWithMove
111+import Reflex.PerformEvent.Base (PerformEventT)
112+
113+#ifdef DEBUG_TRACE_EVENTS
114+import qualified Data.ByteString.Char8 as BS8
115+import System.IO (stderr)
116+import Data.List (isPrefixOf)
117+#endif
118+
119+-- TODO stdout might not be the best channel for debug output
120+debugStrLn :: String -> IO ()
121+debugStrLn = putStrLn
75122
76−-- Note: must come last to silence warnings due to AMP on GHC < 7.10
77−import Prelude hiding (any, concat, mapM, mapM_, sequence)
123+#ifdef DEBUG_TRACE_EVENTS
124+withStackOneLine :: (BS8.ByteString -> a) -> a
125+withStackOneLine expr = unsafePerformIO $ do
126+ stack <- currentCallStack
127+ return (expr . BS8.pack . unwords . dropInternal . reverse $ stack)
128+ where dropInternal = filterStack "Reflex.Spider.Internal"
78129
79−type SubscriberList a = WeakBag (Subscriber a)
80−type SubscriberListTicket a = WeakBagTicket (Subscriber a)
130+#endif
81131
82132debugPropagate :: Bool
83133
@@ -86,79 +136,65 @@ debugInvalidateHeight :: Bool
86136debugInvalidate :: Bool
87137
88138#ifdef DEBUG
89−
90139#define DEBUG_NODEIDS
91140
141+#ifdef DEBUG_TRACE_PROPAGATION
92142debugPropagate = True
143+#else
144+debugPropagate = False
145+#endif
93146
147+#ifdef DEBUG_TRACE_HEIGHT
148+debugInvalidateHeight = True
149+#else
94150debugInvalidateHeight = False
151+#endif
95152
153+#ifdef DEBUG_TRACE_INVALIDATION
96154debugInvalidate = True
155+#else
156+debugInvalidate = False
157+#endif
97158
98159class HasNodeId a where
99160 getNodeId :: a -> Int
100161
101−instance HasNodeId (Hold p a) where
102− getNodeId = holdNodeId
162+instance HasNodeId (CacheSubscribed x a) where
163+ getNodeId = _cacheSubscribed_nodeId
103164
104−instance HasNodeId (PushSubscribed a b) where
105− getNodeId = pushSubscribedNodeId
165+instance HasNodeId (FanInt x a) where
166+ getNodeId = _fanInt_nodeId
106167
107−instance HasNodeId (SwitchSubscribed a) where
108− getNodeId = switchSubscribedNodeId
168+instance HasNodeId (Hold x p) where
169+ getNodeId = holdNodeId
109170
110−instance HasNodeId (MergeSubscribed a) where
111− getNodeId = mergeSubscribedNodeId
171+instance HasNodeId (SwitchSubscribed x a) where
172+ getNodeId = switchSubscribedNodeId
112173
113−instance HasNodeId (FanSubscribed a) where
174+instance HasNodeId (FanSubscribed x v a) where
114175 getNodeId = fanSubscribedNodeId
115176
116−instance HasNodeId (CoincidenceSubscribed a) where
177+instance HasNodeId (CoincidenceSubscribed x a) where
117178 getNodeId = coincidenceSubscribedNodeId
118179
119−instance HasNodeId (RootSubscribed a) where
180+instance HasNodeId (RootSubscribed x a) where
120181 getNodeId = rootSubscribedNodeId
121182
122−instance HasNodeId (Pull a) where
183+instance HasNodeId (Pull x a) where
123184 getNodeId = pullNodeId
124185
125186{-# INLINE showNodeId #-}
126187showNodeId :: HasNodeId a => a -> String
127−showNodeId = ("#"<>) . show . getNodeId
128−
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"
188+showNodeId = showNodeId' . getNodeId
189+
190+showNodeId' :: Int -> String
191+showNodeId' = ("#"<>) . show
192+
155193
156194#else
157195
158196debugPropagate = False
159−
160197debugInvalidateHeight = False
161−
162198debugInvalidate = False
163199
164200-- This must be inline, or error messages will cause memory leaks due to retaining the node in question
@@ -166,6 +202,10 @@ debugInvalidate = False
166202showNodeId :: a -> String
167203showNodeId _ = ""
168204
205+{-# INLINE showNodeId' #-}
206+showNodeId' :: Int -> String
207+showNodeId' _ = ""
208+
169209#endif
170210
171211#ifdef DEBUG_NODEIDS
@@ -175,41 +215,637 @@ nextNodeIdRef = unsafePerformIO $ newIORef 1
175215
176216newNodeId :: IO Int
177217newNodeId = atomicModifyIORef' nextNodeIdRef $ \n -> (succ n, n)
218+#endif
219+
220+--------------------------------------------------------------------------------
221+-- EventSubscription
222+--------------------------------------------------------------------------------
223+
224+--NB: Once you subscribe to an Event, you must always hold on the the WHOLE EventSubscription you get back
225+-- If you do not retain the subscription, you may be prematurely unsubscribed from the parent event.
226+data EventSubscription x = EventSubscription
227+ { _eventSubscription_unsubscribe :: !(IO ())
228+ , _eventSubscription_subscribed :: {-# UNPACK #-} !(EventSubscribed x)
229+ }
230+
231+unsubscribe :: EventSubscription x -> IO ()
232+unsubscribe (EventSubscription u _) = u
233+
234+--------------------------------------------------------------------------------
235+-- Event
236+--------------------------------------------------------------------------------
237+
238+newtype Event x a = Event { unEvent :: Subscriber x a -> EventM x (EventSubscription x, Maybe a) }
239+
240+{-# INLINE subscribeAndRead #-}
241+subscribeAndRead :: Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
242+subscribeAndRead = unEvent
243+
244+{-# RULES
245+"cacheEvent/cacheEvent" forall e. cacheEvent (cacheEvent e) = cacheEvent e
246+"cacheEvent/pushCheap" forall f e. pushCheap f (cacheEvent e) = cacheEvent (pushCheap f e)
247+"hold/cacheEvent" forall f e. hold f (cacheEvent e) = hold f e
248+ #-}
249+
250+-- | Construct an 'Event' equivalent to that constructed by 'push', but with no
251+-- caching; if the computation function is very cheap, this is (much) more
252+-- efficient than 'push'
253+{-# INLINE [1] pushCheap #-}
254+pushCheap :: HasSpiderTimeline x => (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
255+pushCheap !f e = Event $ \sub -> do
256+ (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "push" $ sub
257+ { subscriberPropagate = \a -> do
258+ mb <- f a
259+ mapM_ (subscriberPropagate sub) mb
260+ }
261+ occ' <- join <$> mapM f occ
262+ return (subscription, occ')
263+
264+-- | A subscriber that never triggers other 'Event's
265+{-# INLINE terminalSubscriber #-}
266+terminalSubscriber :: (a -> EventM x ()) -> Subscriber x a
267+terminalSubscriber p = Subscriber
268+ { subscriberPropagate = p
269+ , subscriberInvalidateHeight = \_ -> return ()
270+ , subscriberRecalculateHeight = \_ -> return ()
271+ }
272+
273+-- | Subscribe to an Event only for the duration of one occurrence
274+{-# INLINE subscribeAndReadHead #-}
275+subscribeAndReadHead :: HasSpiderTimeline x => Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
276+subscribeAndReadHead e sub = do
277+ subscriptionRef <- liftIO $ newIORef $ error "subscribeAndReadHead: not initialized"
278+ (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "head" $ sub
279+ { subscriberPropagate = \a -> do
280+ liftIO $ unsubscribe =<< readIORef subscriptionRef
281+ subscriberPropagate sub a
282+ }
283+ liftIO $ case occ of
284+ Nothing -> writeIORef subscriptionRef $! subscription
285+ Just _ -> unsubscribe subscription
286+ return (subscription, occ)
287+
288+--TODO: Make this lazy in its input event
289+headE :: (MonadIO m, Defer (SomeMergeInit x) m, HasSpiderTimeline x) => Event x a -> m (Event x a)
290+headE originalE = do
291+ parent <- liftIO $ newIORef $ Just originalE
292+ defer $ SomeMergeInit $ do --TODO: Rename SomeMergeInit appropriately
293+ let clearParent = liftIO $ writeIORef parent Nothing
294+ (_, occ) <- subscribeAndReadHead originalE $ terminalSubscriber $ const clearParent
295+ when (isJust occ) clearParent
296+ return $ Event $ \sub ->
297+ liftIO (readIORef parent) >>= \case
298+ Nothing -> subscribeAndReadNever
299+ Just e -> subscribeAndReadHead e sub
300+
301+data CacheSubscribed x a
302+ = CacheSubscribed { _cacheSubscribed_subscribers :: {-# UNPACK #-} !(FastWeakBag (Subscriber x a))
303+ , _cacheSubscribed_parent :: {-# UNPACK #-} !(EventSubscription x)
304+ , _cacheSubscribed_occurrence :: {-# UNPACK #-} !(IORef (Maybe a))
305+#ifdef DEBUG_NODEIDS
306+ , _cacheSubscribed_nodeId :: {-# UNPACK #-} !Int
307+#endif
308+ }
309+
310+nowSpiderEventM :: (HasSpiderTimeline x) => EventM x (R.Event (SpiderTimeline x) ())
311+nowSpiderEventM =
312+ SpiderEvent <$> now
313+
314+now :: (MonadIO m, Defer (Some Clear) m, HasSpiderTimeline x
315+ ) => m (Event x ())
316+now = do
317+ nowOrNot <- liftIO $ newIORef $ Just ()
318+ scheduleClear nowOrNot
319+ return . Event $ \_ -> do
320+ occ <- liftIO . readIORef $ nowOrNot
321+ return ( EventSubscription (return ()) eventSubscribedNow
322+ , occ
323+ )
324+
325+-- | Construct an 'Event' whose value is guaranteed not to be recomputed
326+-- repeatedly
327+--
328+--TODO: Try a caching strategy where we subscribe directly to the parent when
329+--there's only one subscriber, and then build our own FastWeakBag only when a second
330+--subscriber joins
331+{-# NOINLINE [0] cacheEvent #-}
332+cacheEvent :: forall x a. HasSpiderTimeline x => Event x a -> Event x a
333+cacheEvent e =
334+#ifdef DEBUG_TRACE_EVENTS
335+ withStackOneLine $ \callSite -> Event $
336+#else
337+ Event $
338+#endif
339+ unsafePerformIO $ do
340+ mSubscribedRef :: IORef (FastWeak (CacheSubscribed x a))
341+ <- newIORef emptyFastWeak
342+ pure $ \sub -> {-# SCC "cacheEvent" #-} do
343+#ifdef DEBUG_TRACE_EVENTS
344+ unless (BS8.null callSite) $ liftIO $ BS8.hPutStrLn stderr callSite
345+#endif
346+ subscribedTicket <- liftIO (readIORef mSubscribedRef >>= getFastWeakTicket) >>= \case
347+ Just subscribedTicket -> return subscribedTicket
348+ Nothing -> do
349+#ifdef DEBUG_NODEIDS
350+ nodeId <- liftIO newNodeId
351+#endif
352+ subscribers <- liftIO FastWeakBag.empty
353+ occRef <- liftIO $ newIORef Nothing -- This should never be read prior to being set below
354+#ifdef DEBUG_NODEIDS
355+ (parentSub, occ) <- subscribeAndRead e $ debugSubscriber' ("cacheEvent" <> showNodeId' nodeId) $ Subscriber
356+#else
357+ (parentSub, occ) <- subscribeAndRead e $ Subscriber
358+#endif
359+ { subscriberPropagate = \a -> do
360+ liftIO $ writeIORef occRef (Just a)
361+ scheduleClear occRef
362+ propagateFast a subscribers
363+ , subscriberInvalidateHeight = FastWeakBag.traverse_ subscribers . invalidateSubscriberHeight
364+ , subscriberRecalculateHeight = FastWeakBag.traverse_ subscribers . recalculateSubscriberHeight
365+ }
366+ when (isJust occ) $ do
367+ liftIO $ writeIORef occRef occ -- Set the initial value of occRef; we don't need to do this if occ is Nothing
368+ scheduleClear occRef
369+ let !subscribed = CacheSubscribed
370+ { _cacheSubscribed_subscribers = subscribers
371+ , _cacheSubscribed_parent = parentSub
372+ , _cacheSubscribed_occurrence = occRef
373+#ifdef DEBUG_NODEIDS
374+ , _cacheSubscribed_nodeId = nodeId
375+#endif
376+ }
377+ subscribedTicket <- liftIO $ mkFastWeakTicket subscribed
378+ liftIO $ writeIORef mSubscribedRef =<< getFastWeakTicketWeak subscribedTicket
379+ return subscribedTicket
380+ liftIO $ cacheSubscription sub mSubscribedRef subscribedTicket
381+
382+cacheSubscription :: Subscriber x a -> IORef (FastWeak (CacheSubscribed x a))
383+ -> FastWeakTicket (CacheSubscribed x a) -> IO (EventSubscription x, Maybe a)
384+cacheSubscription sub mSubscribedRef subscribedTicket = do
385+ subscribed <- getFastWeakTicketValue subscribedTicket
386+ ticket <- FastWeakBag.insert sub $ _cacheSubscribed_subscribers subscribed
387+ occ <- readIORef $ _cacheSubscribed_occurrence subscribed
388+
389+ let parentSub = _cacheSubscribed_parent subscribed
390+ es = EventSubscription
391+ { _eventSubscription_unsubscribe = do
392+ FastWeakBag.remove ticket
393+
394+ isEmpty <- FastWeakBag.isEmpty $ _cacheSubscribed_subscribers subscribed
395+ when isEmpty $ do
396+ writeIORef mSubscribedRef emptyFastWeak
397+ unsubscribe parentSub
398+ touch ticket
399+ touch subscribedTicket
400+ , _eventSubscription_subscribed = EventSubscribed
401+ { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed parentSub
402+ , eventSubscribedRetained = toAny subscribedTicket
403+#ifdef DEBUG_CYCLES
404+ , eventSubscribedGetParents = return [_eventSubscription_subscribed parentSub]
405+ , eventSubscribedHasOwnHeightRef = False
406+ , eventSubscribedWhoCreated = whoCreatedIORef mSubscribedRef
407+#endif
408+ }
409+ }
410+ return (es, occ)
411+
412+
413+subscribe :: Event x a -> Subscriber x a -> EventM x (EventSubscription x)
414+subscribe e s = fst <$> subscribeAndRead e s
415+
416+{-# INLINE wrap #-}
417+wrap :: MonadIO m => (t -> EventSubscribed x) -> (Subscriber x a -> m (WeakBagTicket, t, Maybe a)) -> Subscriber x a -> m (EventSubscription x, Maybe a)
418+wrap tag getSpecificSubscribed sub = do
419+ (sln, subd, occ) <- getSpecificSubscribed sub
420+ let es = tag subd
421+ return (EventSubscription (WeakBag.remove sln >> touch sln) es, occ)
422+
423+eventRoot :: (GCompare k, HasSpiderTimeline x) => k a -> Root x k -> Event x a
424+eventRoot !k !r = Event $ wrap eventSubscribedRoot $ liftIO . getRootSubscribed k r
425+
426+subscribeAndReadNever :: EventM x (EventSubscription x, Maybe a)
427+subscribeAndReadNever = return (EventSubscription (return ()) eventSubscribedNever, Nothing)
428+
429+eventNever :: Event x a
430+eventNever = Event $ const subscribeAndReadNever
431+
432+eventFan :: (GCompare k, HasSpiderTimeline x) => k a -> Fan x k v -> Event x (v a)
433+eventFan !k !f = Event $ wrap eventSubscribedFan $ getFanSubscribed k f
434+
435+eventSwitch :: HasSpiderTimeline x => Switch x a -> Event x a
436+eventSwitch !s = Event $ wrap eventSubscribedSwitch $ getSwitchSubscribed s
437+
438+eventCoincidence :: HasSpiderTimeline x => Coincidence x a -> Event x a
439+eventCoincidence !c = Event $ wrap eventSubscribedCoincidence $ getCoincidenceSubscribed c
440+
441+eventHold :: Hold x p -> Event x p
442+eventHold !h = Event $ subscribeHoldEvent h
443+
444+eventDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> Event x p
445+eventDyn !j = Event $ \sub -> getDynHold j >>= \h -> subscribeHoldEvent h sub
446+
447+{-# INLINE subscribeCoincidenceInner #-}
448+subscribeCoincidenceInner :: HasSpiderTimeline x => Event x a -> Height -> CoincidenceSubscribed x a -> EventM x (Maybe a, Height, EventSubscribed x)
449+subscribeCoincidenceInner inner outerHeight subscribedUnsafe = do
450+ subInner <- liftIO $ newSubscriberCoincidenceInner subscribedUnsafe
451+ (subscription@(EventSubscription _ innerSubd), innerOcc) <- subscribeAndRead inner subInner
452+ innerHeight <- liftIO $ getEventSubscribedHeight innerSubd
453+ let height = max innerHeight outerHeight
454+ defer $ SomeResetCoincidence subscription $ if height > outerHeight then Just subscribedUnsafe else Nothing
455+ return (innerOcc, height, innerSubd)
456+
457+--------------------------------------------------------------------------------
458+-- Subscriber
459+--------------------------------------------------------------------------------
460+
461+data Subscriber x a = Subscriber
462+ { subscriberPropagate :: !(a -> EventM x ())
463+ , subscriberInvalidateHeight :: !(Height -> IO ())
464+ , subscriberRecalculateHeight :: !(Height -> IO ())
465+ }
466+
467+newSubscriberHold :: (HasSpiderTimeline x, Patch p) => Hold x p -> IO (Subscriber x p)
468+newSubscriberHold h = return $ Subscriber
469+ { subscriberPropagate = {-# SCC "traverseHold" #-} propagateSubscriberHold h
470+ , subscriberInvalidateHeight = \_ -> return ()
471+ , subscriberRecalculateHeight = \_ -> return ()
472+ }
473+
474+newSubscriberFan :: forall x k v. (HasSpiderTimeline x, GCompare k) => FanSubscribed x k v -> IO (Subscriber x (DMap k v))
475+newSubscriberFan subscribed = debugSubscriber ("SubscriberFan " <> showNodeId subscribed) $ Subscriber
476+ { subscriberPropagate = \a -> {-# SCC "traverseFan" #-} do
477+ subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
478+ tracePropagate (Proxy :: Proxy x) $ show (DMap.size subs) <> " keys subscribed, " <> show (DMap.size a) <> " keys firing"
479+ liftIO $ writeIORef (fanSubscribedOccurrence subscribed) $ Just a
480+ scheduleClear $ fanSubscribedOccurrence subscribed
481+ let f _ (Pair v subsubs) = do
482+ propagate v $ _fanSubscribedChildren_list subsubs
483+ return $ Constant ()
484+ _ <- DMap.traverseWithKey f $ DMap.intersectionWithKey (\_ -> Pair) a subs --TODO: Would be nice to have DMap.traverse_
485+ return ()
486+ , subscriberInvalidateHeight = \old -> do
487+ subscribers <- readIORef $ fanSubscribedSubscribers subscribed
488+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
489+ , subscriberRecalculateHeight = \new -> do
490+ subscribers <- readIORef $ fanSubscribedSubscribers subscribed
491+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
492+ }
493+
494+newSubscriberSwitch :: forall x a. HasSpiderTimeline x => SwitchSubscribed x a -> IO (Subscriber x a)
495+newSubscriberSwitch subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
496+ { subscriberPropagate = \a -> {-# SCC "traverseSwitch" #-} do
497+ liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
498+ scheduleClear $ switchSubscribedOccurrence subscribed
499+ propagate a $ switchSubscribedSubscribers subscribed
500+ , subscriberInvalidateHeight = \_ -> do
501+ oldHeight <- readIORef $ switchSubscribedHeight subscribed
502+ when (oldHeight /= invalidHeight) $ do
503+ writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
504+ WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
505+ , subscriberRecalculateHeight = (`updateSwitchHeight` subscribed)
506+ }
507+
508+newSubscriberCoincidenceOuter :: forall x b. HasSpiderTimeline x => CoincidenceSubscribed x b -> IO (Subscriber x (Event x b))
509+newSubscriberCoincidenceOuter subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
510+ { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceOuter" #-} do
511+ outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
512+ tracePropagate (Proxy :: Proxy x) $ " outerHeight = " <> show outerHeight
513+ (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
514+ tracePropagate (Proxy :: Proxy x) $ " isJust occ = " <> show (isJust occ)
515+ tracePropagate (Proxy :: Proxy x) $ " innerHeight = " <> show innerHeight
516+
517+ liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
518+ scheduleClear $ coincidenceSubscribedInnerParent subscribed
519+ case occ of
520+ Nothing ->
521+ when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
522+ writeIORef (coincidenceSubscribedHeight subscribed) $! innerHeight
523+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
524+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
525+ Just o -> do -- Since it's already firing, no need to adjust height
526+ liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
527+ scheduleClear $ coincidenceSubscribedOccurrence subscribed
528+ propagate o $ coincidenceSubscribedSubscribers subscribed
529+ , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
530+ , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
531+ }
178532
179−{-# NOINLINE unsafeNodeId #-}
180−unsafeNodeId :: a -> Int
181−unsafeNodeId a = unsafePerformIO $ do
182− touch a
183− newNodeId
533+newSubscriberCoincidenceInner :: forall x a. HasSpiderTimeline x => CoincidenceSubscribed x a -> IO (Subscriber x a)
534+newSubscriberCoincidenceInner subscribed = debugSubscriber ("SubscriberCoincidenceInner" <> showNodeId subscribed) $ Subscriber
535+ { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceInner" #-} do
536+ occ <- liftIO $ readIORef $ coincidenceSubscribedOccurrence subscribed
537+ case occ of
538+ Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
539+ Nothing -> do
540+ liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
541+ scheduleClear $ coincidenceSubscribedOccurrence subscribed
542+ propagate a $ coincidenceSubscribedSubscribers subscribed
543+ , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
544+ , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
545+ }
546+
547+invalidateSubscriberHeight :: Height -> Subscriber x a -> IO ()
548+invalidateSubscriberHeight = flip subscriberInvalidateHeight
549+
550+recalculateSubscriberHeight :: Height -> Subscriber x a -> IO ()
551+recalculateSubscriberHeight = flip subscriberRecalculateHeight
552+
553+-- | Propagate everything at the current height
554+propagate :: forall x a. HasSpiderTimeline x => a -> WeakBag (Subscriber x a) -> EventM x ()
555+propagate a subscribers = withIncreasedDepth (Proxy::Proxy x) $
556+ -- 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
557+ --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
558+ WeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
559+
560+-- | Propagate everything at the current height
561+propagateFast :: forall x a. HasSpiderTimeline x => a -> FastWeakBag (Subscriber x a) -> EventM x ()
562+propagateFast a subscribers = withIncreasedDepth (Proxy::Proxy x) $
563+ -- 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
564+ --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
565+ FastWeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
566+
567+--------------------------------------------------------------------------------
568+-- EventSubscribed
569+--------------------------------------------------------------------------------
570+
571+toAny :: a -> Any
572+toAny = unsafeCoerce
573+
574+-- Why do we use Any here, instead of just giving eventSubscribedRetained an
575+-- existential type? Sadly, GHC does not currently know how to unbox types
576+-- with existentially quantified fields. So instead we just coerce values
577+-- to type Any on the way in. Since we never coerce them back, this is
578+-- perfectly safe.
579+data EventSubscribed x = EventSubscribed
580+ { eventSubscribedHeightRef :: {-# UNPACK #-} !(IORef Height)
581+ , eventSubscribedRetained :: {-# NOUNPACK #-} !Any
582+#ifdef DEBUG_CYCLES
583+ , eventSubscribedGetParents :: !(IO [EventSubscribed x]) -- For debugging loops
584+ , eventSubscribedHasOwnHeightRef :: !Bool
585+ , eventSubscribedWhoCreated :: !(IO [String])
586+#endif
587+ }
588+
589+eventSubscribedRoot :: RootSubscribed x a -> EventSubscribed x
590+eventSubscribedRoot !r = EventSubscribed
591+ { eventSubscribedHeightRef = zeroRef
592+ , eventSubscribedRetained = toAny r
593+#ifdef DEBUG_CYCLES
594+ , eventSubscribedGetParents = return []
595+ , eventSubscribedHasOwnHeightRef = False
596+ , eventSubscribedWhoCreated = return ["root"]
597+#endif
598+ }
599+
600+eventSubscribedNever :: EventSubscribed x
601+eventSubscribedNever = EventSubscribed
602+ { eventSubscribedHeightRef = zeroRef
603+ , eventSubscribedRetained = toAny ()
604+#ifdef DEBUG_CYCLES
605+ , eventSubscribedGetParents = return []
606+ , eventSubscribedHasOwnHeightRef = False
607+ , eventSubscribedWhoCreated = return ["never"]
184608#endif
609+ }
610+eventSubscribedNow :: EventSubscribed x
611+eventSubscribedNow = EventSubscribed
612+ { eventSubscribedHeightRef = zeroRef
613+ , eventSubscribedRetained = toAny ()
614+#ifdef DEBUG_CYCLES
615+ , eventSubscribedGetParents = return []
616+ , eventSubscribedHasOwnHeightRef = False
617+ , eventSubscribedWhoCreated = return ["now"]
618+#endif
619+ }
620+
621+eventSubscribedFan :: FanSubscribed x k v -> EventSubscribed x
622+eventSubscribedFan !subscribed = EventSubscribed
623+ { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
624+ , eventSubscribedRetained = toAny subscribed
625+#ifdef DEBUG_CYCLES
626+ , eventSubscribedGetParents = return [_eventSubscription_subscribed $ fanSubscribedParent subscribed]
627+ , eventSubscribedHasOwnHeightRef = False
628+ , eventSubscribedWhoCreated = whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
629+#endif
630+ }
631+
632+eventSubscribedSwitch :: SwitchSubscribed x a -> EventSubscribed x
633+eventSubscribedSwitch !subscribed = EventSubscribed
634+ { eventSubscribedHeightRef = switchSubscribedHeight subscribed
635+ , eventSubscribedRetained = toAny subscribed
636+#ifdef DEBUG_CYCLES
637+ , eventSubscribedGetParents = do
638+ s <- readIORef $ switchSubscribedCurrentParent subscribed
639+ return [_eventSubscription_subscribed s]
640+ , eventSubscribedHasOwnHeightRef = True
641+ , eventSubscribedWhoCreated = whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
642+#endif
643+ }
644+
645+eventSubscribedCoincidence :: CoincidenceSubscribed x a -> EventSubscribed x
646+eventSubscribedCoincidence !subscribed = EventSubscribed
647+ { eventSubscribedHeightRef = coincidenceSubscribedHeight subscribed
648+ , eventSubscribedRetained = toAny subscribed
649+#ifdef DEBUG_CYCLES
650+ , eventSubscribedGetParents = do
651+ innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
652+ let outerParent = _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
653+ innerParents = maybeToList $ innerSubscription
654+ return $ outerParent : innerParents
655+ , eventSubscribedHasOwnHeightRef = True
656+ , eventSubscribedWhoCreated = whoCreatedIORef $ coincidenceSubscribedCachedSubscribed subscribed
657+#endif
658+ }
659+
660+getEventSubscribedHeight :: EventSubscribed x -> IO Height
661+getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
662+
663+#ifdef DEBUG_CYCLES
664+whoCreatedEventSubscribed :: EventSubscribed x -> IO [String]
665+whoCreatedEventSubscribed = eventSubscribedWhoCreated
666+
667+walkInvalidHeightParents :: EventSubscribed x -> IO [EventSubscribed x]
668+walkInvalidHeightParents s0 = do
669+ subscribers <- flip execStateT mempty $ ($ s0) $ fix $ \loop s -> do
670+ h <- liftIO $ readIORef $ eventSubscribedHeightRef s
671+ when (h == invalidHeight) $ do
672+ when (eventSubscribedHasOwnHeightRef s) $ liftIO $ writeIORef (eventSubscribedHeightRef s) $! invalidHeightBeingTraversed
673+ modify (s :)
674+ mapM_ loop =<< liftIO (eventSubscribedGetParents s)
675+ forM_ subscribers $ \s -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
676+ return subscribers
677+#endif
678+
679+{-# INLINE subscribeHoldEvent #-}
680+subscribeHoldEvent :: Hold x p -> Subscriber x p -> EventM x (EventSubscription x, Maybe p)
681+subscribeHoldEvent = subscribeAndRead . holdEvent
682+
683+--------------------------------------------------------------------------------
684+-- Behavior
685+--------------------------------------------------------------------------------
686+
687+newtype Behavior x a = Behavior { readBehaviorTracked :: BehaviorM x a }
688+
689+behaviorHold :: Hold x p -> Behavior x (PatchTarget p)
690+behaviorHold !h = Behavior $ readHoldTracked h
691+
692+behaviorHoldIdentity :: Hold x (Identity a) -> Behavior x a
693+behaviorHoldIdentity = behaviorHold
694+
695+behaviorConst :: a -> Behavior x a
696+behaviorConst !a = Behavior $ return a
697+
698+behaviorPull :: Pull x a -> Behavior x a
699+behaviorPull !p = Behavior $ do
700+ val <- liftIO $ readIORef $ pullValue p
701+ case val of
702+ Just subscribed -> do
703+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedPull subscribed)) :))
704+ askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (pullSubscribedInvalidators subscribed) (wi:))
705+ liftIO $ touch $ pullSubscribedOwnInvalidator subscribed
706+ return $ pullSubscribedValue subscribed
707+ Nothing -> do
708+ i <- liftIO $ newInvalidatorPull p
709+ wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorPull"
710+ parentsRef <- liftIO $ newIORef []
711+ holdInits <- askBehaviorHoldInits
712+ a <- liftIO $ runReaderIO (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
713+ invsRef <- liftIO . newIORef . maybeToList =<< askInvalidator
714+ parents <- liftIO $ readIORef parentsRef
715+ let subscribed = PullSubscribed
716+ { pullSubscribedValue = a
717+ , pullSubscribedInvalidators = invsRef
718+ , pullSubscribedOwnInvalidator = i
719+ , pullSubscribedParents = parents
720+ }
721+ liftIO $ writeIORef (pullValue p) $ Just subscribed
722+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedPull subscribed)) :))
723+ return a
724+
725+behaviorDyn :: Patch p => Dyn x p -> Behavior x (PatchTarget p)
726+behaviorDyn !d = Behavior $ readHoldTracked =<< getDynHold d
727+
728+{-# INLINE readHoldTracked #-}
729+readHoldTracked :: Hold x p -> BehaviorM x (PatchTarget p)
730+readHoldTracked h = do
731+ result <- liftIO $ readIORef $ holdValue h
732+ askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (holdInvalidators h) (wi:))
733+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedHold h)) :))
734+ liftIO $ touch h -- Otherwise, if this gets inlined enough, the hold's parent reference may get collected
735+ return result
736+
737+{-# INLINABLE readBehaviorUntracked #-}
738+readBehaviorUntracked :: Defer (SomeHoldInit x) m => Behavior x a -> m a
739+readBehaviorUntracked b = do
740+ holdInits <- getDeferralQueue
741+ liftIO $ runBehaviorM (readBehaviorTracked b) Nothing holdInits --TODO: Specialize readBehaviorTracked to the Nothing and Just cases
742+
743+--------------------------------------------------------------------------------
744+-- Dynamic
745+--------------------------------------------------------------------------------
746+
747+type DynamicS x p = Dynamic x (PatchTarget p) p
748+
749+data Dynamic x target p = Dynamic
750+ { dynamicCurrent :: !(Behavior x target)
751+ , dynamicUpdated :: Event x p -- This must be lazy; see the comment on holdEvent --TODO: Would this let us eliminate `Dyn`?
752+ }
753+
754+deriving instance (HasSpiderTimeline x) => Functor (Dynamic x target)
755+
756+
757+
758+
759+dynamicHold :: Hold x p -> DynamicS x p
760+dynamicHold !h = Dynamic
761+ { dynamicCurrent = behaviorHold h
762+ , dynamicUpdated = eventHold h
763+ }
764+
765+dynamicHoldIdentity :: Hold x (Identity a) -> DynamicS x (Identity a)
766+dynamicHoldIdentity = dynamicHold
767+
768+dynamicConst :: PatchTarget p -> DynamicS x p
769+dynamicConst !a = Dynamic
770+ { dynamicCurrent = behaviorConst a
771+ , dynamicUpdated = eventNever
772+ }
773+
774+dynamicDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> DynamicS x p
775+dynamicDyn !d = Dynamic
776+ { dynamicCurrent = behaviorDyn d
777+ , dynamicUpdated = eventDyn d
778+ }
779+
780+dynamicDynIdentity :: HasSpiderTimeline x => Dyn x (Identity a) -> DynamicS x (Identity a)
781+dynamicDynIdentity = dynamicDyn
782+
783+--------------------------------------------------------------------------------
784+-- Combinators
785+--------------------------------------------------------------------------------
185786
186−--TODO: Figure out why certain things are not 'representational', then make them representational so we can use coerce
187787--type role Hold representational
188−data Hold p a
189− = Hold { holdValue :: !(IORef a)
190− , holdInvalidators :: !(IORef [Weak Invalidator])
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
788+data Hold x p
789+ = Hold { holdValue :: !(IORef (PatchTarget p))
790+ , holdInvalidators :: !(IORef [Weak (Invalidator x)])
791+ , holdEvent :: Event x p -- This must be lazy, or holds cannot be defined before their input Events
792+ , holdParent :: !(IORef (Maybe (EventSubscription x))) -- Keeps its parent alive (will be undefined until the hold is initialized) --TODO: Probably shouldn't be an IORef
192793#ifdef DEBUG_NODEIDS
193794 , holdNodeId :: Int
194795#endif
195796 }
196797
798+-- | A statically allocated 'SpiderTimeline'
799+data Global
800+
801+{-# NOINLINE globalSpiderTimelineEnv #-}
802+globalSpiderTimelineEnv :: SpiderTimelineEnv Global
803+globalSpiderTimelineEnv = unsafePerformIO unsafeNewSpiderTimelineEnv
804+
805+-- | Stores all global data relevant to a particular Spider timeline; only one
806+-- value should exist for each type @x@
807+newtype SpiderTimelineEnv x = STE {unSTE :: SpiderTimelineEnv' x}
808+-- We implement SpiderTimelineEnv with a newtype wrapper so
809+-- we can get the coercions we want safely.
810+type role SpiderTimelineEnv nominal
811+
812+data SpiderTimelineEnv' x = SpiderTimelineEnv
813+ { _spiderTimeline_lock :: {-# UNPACK #-} !(MVar ())
814+ , _spiderTimeline_eventEnv :: {-# UNPACK #-} !(EventEnv x)
815+#ifdef DEBUG
816+ , _spiderTimeline_depth :: {-# UNPACK #-} !(IORef Int)
817+#endif
818+ }
819+type role SpiderTimelineEnv' phantom
820+
821+instance Eq (SpiderTimelineEnv x) where
822+ _ == _ = True -- Since only one exists of each type
823+
824+instance GEq SpiderTimelineEnv where
825+ a `geq` b = if _spiderTimeline_lock (unSTE a) == _spiderTimeline_lock (unSTE b)
826+ then Just $ unsafeCoerce Refl -- This unsafeCoerce is safe because the same SpiderTimelineEnv can't have two different 'x' arguments
827+ else Nothing
828+
197829data 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])
830+ = EventEnv { eventEnvAssignments :: !(IORef [SomeAssignment x]) -- Needed for Subscribe
831+ , eventEnvHoldInits :: !(IORef [SomeHoldInit x]) -- Needed for Subscribe
832+ , eventEnvDynInits :: !(IORef [SomeDynInit x])
833+ , eventEnvMergeUpdates :: !(IORef [SomeMergeUpdate x])
834+ , eventEnvMergeInits :: !(IORef [SomeMergeInit x]) -- Needed for Subscribe
835+ , eventEnvClears :: !(IORef [Some Clear]) -- Needed for Subscribe
836+ , eventEnvIntClears :: !(IORef [Some IntClear])
837+ , eventEnvRootClears :: !(IORef [Some RootClear])
205838 , eventEnvCurrentHeight :: !(IORef Height) -- Needed for Subscribe
206− , eventEnvResetCoincidences :: !(IORef [SomeResetCoincidence]) -- Needed for Subscribe
207− , eventEnvDelayedMerges :: !(IORef (IntMap [DelayedMerge]))
839+ , eventEnvResetCoincidences :: !(IORef [SomeResetCoincidence x]) -- Needed for Subscribe
840+ , eventEnvDelayedMerges :: !(IORef (IntMap [EventM x ()]))
208841 }
209842
210843{-# INLINE runEventM #-}
211−runEventM :: EventM x a -> EventEnv x -> IO a
212−runEventM = runReaderT . unEventM
844+runEventM :: EventM x a -> IO a
845+runEventM = unEventM
846+
847+asksEventEnv :: forall x a. HasSpiderTimeline x => (EventEnv x -> a) -> EventM x a
848+asksEventEnv f = return $ f $ _spiderTimeline_eventEnv (unSTE (spiderTimeline :: SpiderTimelineEnv x))
213849
214850class MonadIO m => Defer a m where
215851 getDeferralQueue :: m (IORef [a])
@@ -220,91 +856,98 @@ defer a = do
220856 q <- getDeferralQueue
221857 liftIO $ modifyIORef' q (a:)
222858
223−instance Defer SomeAssignment (EventM x) where
859+instance HasSpiderTimeline x => Defer (SomeAssignment x) (EventM x) where
224860 {-# INLINE getDeferralQueue #-}
225− getDeferralQueue = EventM $ asks eventEnvAssignments
861+ getDeferralQueue = asksEventEnv eventEnvAssignments
226862
227−instance Defer SomeHoldInit (EventM x) where
863+instance HasSpiderTimeline x => Defer (SomeHoldInit x) (EventM x) where
228864 {-# INLINE getDeferralQueue #-}
229− getDeferralQueue = EventM $ asks eventEnvHoldInits
865+ getDeferralQueue = asksEventEnv eventEnvHoldInits
230866
231−instance Defer SomeHoldInit BehaviorM where
867+instance HasSpiderTimeline x => Defer (SomeDynInit x) (EventM x) where
868+ {-# INLINE getDeferralQueue #-}
869+ getDeferralQueue = asksEventEnv eventEnvDynInits
870+
871+instance Defer (SomeHoldInit x) (BehaviorM x) where
232872 {-# INLINE getDeferralQueue #-}
233873 getDeferralQueue = BehaviorM $ asks snd
234874
235−instance Defer SomeMergeUpdate (EventM x) where
875+instance HasSpiderTimeline x => Defer (SomeMergeUpdate x) (EventM x) where
236876 {-# INLINE getDeferralQueue #-}
237− getDeferralQueue = EventM $ asks eventEnvMergeUpdates
877+ getDeferralQueue = asksEventEnv eventEnvMergeUpdates
238878
239−instance Defer SomeMergeInit (EventM x) where
879+instance HasSpiderTimeline x => Defer (SomeMergeInit x) (EventM x) where
240880 {-# INLINE getDeferralQueue #-}
241− getDeferralQueue = EventM $ asks eventEnvMergeInits
881+ getDeferralQueue = asksEventEnv eventEnvMergeInits
242882
243−class HasCurrentHeight m where
883+class HasSpiderTimeline x => HasCurrentHeight x m | m -> x where
244884 getCurrentHeight :: m Height
245− scheduleMerge :: Height -> MergeSubscribed a -> m ()
885+ scheduleMerge :: Height -> EventM x () -> m ()
246886
247−instance HasCurrentHeight (EventM x) where
887+instance HasSpiderTimeline x => HasCurrentHeight x (EventM x) where
248888 {-# INLINE getCurrentHeight #-}
249− getCurrentHeight = EventM $ do
250− heightRef <- asks eventEnvCurrentHeight
889+ getCurrentHeight = do
890+ heightRef <- asksEventEnv eventEnvCurrentHeight
251891 liftIO $ readIORef heightRef
252892 {-# INLINE scheduleMerge #-}
253− scheduleMerge height subscribed = EventM $ do
254− delayedRef <- asks eventEnvDelayedMerges
255− liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) (unHeight height) [DelayedMerge subscribed]
893+ scheduleMerge height subscribed = do
894+ delayedRef <- asksEventEnv eventEnvDelayedMerges
895+ liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) (unHeight height) [subscribed]
256896
257−class HasSpiderEnv x m | m -> x where
258− -- | Retrieve the current SpiderEnv
259− askSpiderEnv :: m (SpiderEnv x)
897+class HasSpiderTimeline x where
898+ -- | Retrieve the current SpiderTimelineEnv
899+ spiderTimeline :: SpiderTimelineEnv x
260900
261−instance HasSpiderEnv x (EventM x) where
262− {-# INLINE askSpiderEnv #-}
263− askSpiderEnv = EventM $ asks eventEnvSpiderEnv
901+instance HasSpiderTimeline Global where
902+ spiderTimeline = globalSpiderTimelineEnv
264903
265−instance HasSpiderEnv x (SpiderHost x) where
266− {-# INLINE askSpiderEnv #-}
267− askSpiderEnv = SpiderHost ask
268−
269−putCurrentHeight :: Height -> EventM x ()
270−putCurrentHeight h = EventM $ do
271− heightRef <- asks eventEnvCurrentHeight
904+putCurrentHeight :: HasSpiderTimeline x => Height -> EventM x ()
905+putCurrentHeight h = do
906+ heightRef <- asksEventEnv eventEnvCurrentHeight
272907 liftIO $ writeIORef heightRef $! h
273908
274−instance Defer SomeClear (EventM x) where
909+instance HasSpiderTimeline x => Defer (Some Clear) (EventM x) where
275910 {-# INLINE getDeferralQueue #-}
276− getDeferralQueue = EventM $ asks eventEnvClears
911+ getDeferralQueue = asksEventEnv eventEnvClears
277912
278913{-# INLINE scheduleClear #-}
279−scheduleClear :: Defer SomeClear m => IORef (Maybe a) -> m ()
280−scheduleClear r = defer $ SomeClear r
914+scheduleClear :: Defer (Some Clear) m => IORef (Maybe a) -> m ()
915+scheduleClear r = defer $ Some $ Clear r
281916
282−instance Defer SomeRootClear (EventM x) where
917+instance HasSpiderTimeline x => Defer (Some IntClear) (EventM x) where
283918 {-# INLINE getDeferralQueue #-}
284− getDeferralQueue = EventM $ asks eventEnvRootClears
919+ getDeferralQueue = asksEventEnv eventEnvIntClears
920+
921+{-# INLINE scheduleIntClear #-}
922+scheduleIntClear :: Defer (Some IntClear) m => IORef (IntMap a) -> m ()
923+scheduleIntClear r = defer $ Some $ IntClear r
924+
925+instance HasSpiderTimeline x => Defer (Some RootClear) (EventM x) where
926+ {-# INLINE getDeferralQueue #-}
927+ getDeferralQueue = asksEventEnv eventEnvRootClears
285928
286929{-# INLINE scheduleRootClear #-}
287−scheduleRootClear :: Defer SomeRootClear m => IORef (DMap k Identity) -> m ()
288−scheduleRootClear r = defer $ SomeRootClear r
930+scheduleRootClear :: Defer (Some RootClear) m => IORef (DMap k Identity) -> m ()
931+scheduleRootClear r = defer $ Some $ RootClear r
289932
290−instance Defer SomeResetCoincidence (EventM x) where
933+instance HasSpiderTimeline x => Defer (SomeResetCoincidence x) (EventM x) where
291934 {-# INLINE getDeferralQueue #-}
292− getDeferralQueue = EventM $ asks eventEnvResetCoincidences
935+ getDeferralQueue = asksEventEnv eventEnvResetCoincidences
293936
294937-- Note: hold cannot examine its event until after the phase is over
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)
938+{-# INLINE [1] hold #-}
939+hold :: (Patch p, Defer (SomeHoldInit x) m) => PatchTarget p -> Event x p -> m (Hold x p)
298940hold v0 e = do
299941 valRef <- liftIO $ newIORef v0
300942 invsRef <- liftIO $ newIORef []
301− parentRef <- liftIO $ newIORef $ Left e
943+ parentRef <- liftIO $ newIORef Nothing
302944#ifdef DEBUG_NODEIDS
303945 nodeId <- liftIO newNodeId
304946#endif
305947 let h = Hold
306948 { holdValue = valRef
307949 , holdInvalidators = invsRef
950+ , holdEvent = e
308951 , holdParent = parentRef
309952#ifdef DEBUG_NODEIDS
310953 , holdNodeId = nodeId
@@ -314,134 +957,114 @@ hold v0 e = do
314957 return h
315958
316959{-# 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))
960+getHoldEventSubscription :: forall p x. (HasSpiderTimeline x, Patch p) => Hold x p -> EventM x (EventSubscription x)
318961getHoldEventSubscription h = do
319962 ep <- liftIO $ readIORef $ holdParent h
320963 case ep of
321− Right subd -> return subd
322− Left e -> do
964+ Just subd -> return subd
965+ Nothing -> do
966+ let e = holdEvent h
323967 subscriptionRef <- liftIO $ newIORef $ error "getHoldEventSubscription: subdRef uninitialized"
324− subscription@(EventSubscription _ subd) <- subscribe e =<< liftIO (newSubscriberHold h)
968+ (subscription@(EventSubscription _ _), occ) <- subscribeAndRead e =<< liftIO (newSubscriberHold h)
325969 liftIO $ writeIORef subscriptionRef $! subscription
326− occ <- liftIO $ readEventSubscribed subd
327970 case occ of
328971 Nothing -> return ()
329972 Just o -> do
330973 old <- liftIO $ readIORef $ holdValue h
331− case R.apply o old of
974+ case apply o old of
332975 Nothing -> return ()
333976 Just new -> do
334977 -- Need to evaluate these so that we don't retain the Hold itself
335978 v <- liftIO $ evaluate $ holdValue h
336979 i <- liftIO $ evaluate $ holdInvalidators h
337980 defer $ SomeAssignment v i new
338− liftIO $ writeIORef (holdParent h) $ Right subscription
981+ liftIO $ writeIORef (holdParent h) $ Just subscription
339982 return subscription
340983
341−type BehaviorEnv = (Maybe (Weak Invalidator, IORef [SomeBehaviorSubscribed]), IORef [SomeHoldInit])
984+type BehaviorEnv x = (Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]), IORef [SomeHoldInit x])
342985
343−--type role BehaviorM representational
344986-- BehaviorM can sample behaviors
345−newtype BehaviorM a = BehaviorM { unBehaviorM :: ReaderT BehaviorEnv IO a } deriving (Functor, Applicative, MonadIO, MonadFix)
987+newtype BehaviorM x a = BehaviorM { unBehaviorM :: ReaderIO (BehaviorEnv x) a }
988+ deriving (Functor, Applicative, MonadIO, MonadFix, MonadReader (BehaviorEnv x))
346989
347−instance Monad BehaviorM where
990+instance Monad (BehaviorM x) where
348991 {-# INLINE (>>=) #-}
349992 BehaviorM x >>= f = BehaviorM $ x >>= unBehaviorM . f
350993 {-# INLINE (>>) #-}
351994 BehaviorM x >> BehaviorM y = BehaviorM $ x >> y
352995 {-# INLINE return #-}
353996 return x = BehaviorM $ return x
997+#if !MIN_VERSION_base(4,13,0)
354998 {-# INLINE fail #-}
355999 fail s = BehaviorM $ fail s
1000+#endif
3561001
357−data BehaviorSubscribed a
358− = forall p. BehaviorSubscribedHold (Hold p a)
359− | BehaviorSubscribedPull (PullSubscribed a)
1002+data BehaviorSubscribed x a
1003+ = forall p. BehaviorSubscribedHold (Hold x p)
1004+ | BehaviorSubscribedPull (PullSubscribed x a)
3601005
361−data SomeBehaviorSubscribed = forall a. SomeBehaviorSubscribed (BehaviorSubscribed a)
1006+newtype SomeBehaviorSubscribed x = SomeBehaviorSubscribed (Some (BehaviorSubscribed x))
3621007
3631008--type role PullSubscribed representational
364−data PullSubscribed a
1009+data PullSubscribed x a
3651010 = PullSubscribed { pullSubscribedValue :: !a
366− , pullSubscribedInvalidators :: !(IORef [Weak Invalidator])
367− , pullSubscribedOwnInvalidator :: !Invalidator
368− , pullSubscribedParents :: ![SomeBehaviorSubscribed] -- Need to keep parent behaviors alive, or they won't let us know when they're invalidated
1011+ , pullSubscribedInvalidators :: !(IORef [Weak (Invalidator x)])
1012+ , pullSubscribedOwnInvalidator :: !(Invalidator x)
1013+ , pullSubscribedParents :: ![SomeBehaviorSubscribed x] -- Need to keep parent behaviors alive, or they won't let us know when they're invalidated
3691014 }
3701015
3711016--type role Pull representational
372−data Pull a
373− = Pull { pullValue :: !(IORef (Maybe (PullSubscribed a)))
374− , pullCompute :: !(BehaviorM a)
1017+data Pull x a
1018+ = Pull { pullValue :: !(IORef (Maybe (PullSubscribed x a)))
1019+ , pullCompute :: !(BehaviorM x a)
3751020#ifdef DEBUG_NODEIDS
3761021 , pullNodeId :: Int
3771022#endif
3781023 }
3791024
380−data Invalidator
381− = forall a. InvalidatorPull (Pull a)
382− | forall a. InvalidatorSwitch (SwitchSubscribed a)
1025+data Invalidator x
1026+ = forall a. InvalidatorPull (Pull x a)
1027+ | forall a. InvalidatorSwitch (SwitchSubscribed x a)
3831028
384−data RootSubscribed a = forall k. GCompare k => RootSubscribed
1029+data RootSubscribed x a = forall k. GCompare k => RootSubscribed
3851030 { rootSubscribedKey :: !(k a)
386− , rootSubscribedCachedSubscribed :: !(IORef (DMap k RootSubscribed)) -- From the original Root
387− , rootSubscribedSubscribers :: !(SubscriberList a)
1031+ , rootSubscribedCachedSubscribed :: !(IORef (DMap k (RootSubscribed x))) -- From the original Root
1032+ , rootSubscribedSubscribers :: !(WeakBag (Subscriber x a))
3881033 , rootSubscribedOccurrence :: !(IO (Maybe a)) -- Lookup from rootOccurrence
3891034 , 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?
1035+ , rootSubscribedWeakSelf :: !(IORef (Weak (RootSubscribed x a))) --TODO: Can we make this a lazy non-IORef and then force it manually to avoid an indirection each time we use it?
3911036#ifdef DEBUG_NODEIDS
3921037 , rootSubscribedNodeId :: Int
3931038#endif
3941039 }
3951040
396−data Root (k :: * -> *)
1041+data Root x k
3971042 = Root { rootOccurrence :: !(IORef (DMap k Identity)) -- The currently-firing occurrence of this event
398− , rootSubscribed :: !(IORef (DMap k RootSubscribed))
399− , rootInit :: !(forall a. k a -> RootTrigger a -> IO (IO ()))
1043+ , rootSubscribed :: !(IORef (DMap k (RootSubscribed x)))
1044+ , rootInit :: !(forall a. k a -> RootTrigger x a -> IO (IO ()))
4001045 }
4011046
402−data SomeHoldInit = forall p a. R.Patch p => SomeHoldInit !(Hold p a)
1047+data SomeHoldInit x = forall p. Patch p => SomeHoldInit !(Hold x p)
4031048
404−data SomeMergeUpdate = forall k. GCompare k => SomeMergeUpdate (R.PatchDMap (DMap k Event)) (MergeSubscribed k)
1049+data SomeDynInit x = forall p. Patch p => SomeDynInit !(Dyn x p)
4051050
406−data SomeMergeInit = forall k. GCompare k => SomeMergeInit !(MergeSubscribed k) !(Event (R.PatchDMap (DMap k Event)))
1051+data SomeMergeUpdate x = SomeMergeUpdate
1052+ { _someMergeUpdate_update :: !(EventM x [EventSubscription x])
1053+ , _someMergeUpdate_invalidateHeight :: !(IO ())
1054+ , _someMergeUpdate_recalculateHeight :: !(IO ())
1055+ }
4071056
408−data SomeEventSubscription = forall a. SomeEventSubscription (EventSubscription a)
1057+newtype SomeMergeInit x = SomeMergeInit { unSomeMergeInit :: EventM x () }
4091058
4101059-- EventM can do everything BehaviorM can, plus create holds
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
412−
413−data PushSubscribed a b
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)
421−#ifdef DEBUG_NODEIDS
422− , pushSubscribedNodeId :: Int
423−#endif
424− }
425−
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
1060+newtype EventM x a = EventM { unEventM :: IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException)
4341061
435−data Push a b
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?)
437− , pushParent :: !(Event a)
438− , pushSubscribed :: !(IORef (Maybe (PushSubscribed a b))) --TODO: Can we replace this with an unsafePerformIO thunk?
439− }
440−
441−data MergeSubscribedParent k a = MergeSubscribedParent !(EventSubscription a) !(Subscriber a)
1062+newtype MergeSubscribedParent x a = MergeSubscribedParent { unMergeSubscribedParent :: EventSubscription x }
4421063
443−mergeSubscribedParentSubscription :: MergeSubscribedParent k a -> EventSubscription a
444−mergeSubscribedParentSubscription (MergeSubscribedParent es _) = es
1064+data MergeSubscribedParentWithMove x k a = MergeSubscribedParentWithMove
1065+ { _mergeSubscribedParentWithMove_subscription :: !(EventSubscription x)
1066+ , _mergeSubscribedParentWithMove_key :: !(IORef (k a))
1067+ }
4451068
4461069data HeightBag = HeightBag
4471070 { _heightBag_size :: {-# UNPACK #-} !Int
@@ -459,7 +1082,8 @@ heightBagFromList :: [Height] -> HeightBag
4591082heightBagFromList heights = heightBagVerify $ foldl' (flip heightBagAdd) heightBagEmpty heights
4601083
4611084heightBagAdd :: Height -> HeightBag -> HeightBag
462−heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
1085+heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $
1086+ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
4631087
4641088heightBagRemove :: Height -> HeightBag -> HeightBag
4651089heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.lookup h c of
@@ -468,6 +1092,13 @@ heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.loo
4681092 0 -> IntMap.delete h c
4691093 _ -> IntMap.insert h (pred old) c
4701094
1095+heightBagRemoveMaybe :: Height -> HeightBag -> Maybe HeightBag
1096+heightBagRemoveMaybe (Height h) b@(HeightBag s c) = heightBagVerify . removed <$> IntMap.lookup h c where
1097+ removed old = HeightBag (pred s) $ case old of
1098+ 0 -> IntMap.delete h c
1099+ _ -> IntMap.insert h (pred old) c
1100+
1101+
4711102heightBagMax :: HeightBag -> Height
4721103heightBagMax (HeightBag _ c) = case IntMap.maxViewWithKey c of
4731104 Just ((h, _), _) -> Height h
@@ -485,337 +1116,183 @@ heightBagVerify b@(HeightBag s c) = if
4851116heightBagVerify = id
4861117#endif
4871118
488−data MergeSubscribed k
489− = MergeSubscribed { mergeSubscribedCachedSubscribed :: !(IORef (Maybe (MergeSubscribed k))) -- From the original merge
490− , mergeSubscribedOccurrence :: !(IORef (Maybe (DMap k Identity)))
491− , mergeSubscribedAccum :: !(IORef (DMap k Identity)) -- This will accumulate occurrences until our height is reached, at which point it will be transferred to mergeSubscribedOccurrence
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)))
498−#ifdef DEBUG_NODEIDS
499− , mergeSubscribedNodeId :: Int
500−#endif
501− }
502−
503−--TODO: DMap sucks; we should really write something better (with a functor for the value as well as the key)
504−data Merge k
505− = Merge { mergeParents :: !(Dynamic R.PatchDMap (DMap k Event))
506− , mergeSubscribed :: !(IORef (Maybe (MergeSubscribed k)))
507− }
508−
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)))
1119+data FanSubscribedChildren x k v a = FanSubscribedChildren
1120+ { _fanSubscribedChildren_list :: !(WeakBag (Subscriber x (v a)))
1121+ , _fanSubscribedChildren_self :: {-# NOUNPACK #-} !(k a, FanSubscribed x k v)
1122+ , _fanSubscribedChildren_weakSelf :: !(IORef (Weak (k a, FanSubscribed x k v)))
5131123 }
5141124
515−data FanSubscribed k
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))
1125+data FanSubscribed x k v
1126+ = FanSubscribed { fanSubscribedCachedSubscribed :: !(IORef (Maybe (FanSubscribed x k v)))
1127+ , fanSubscribedOccurrence :: !(IORef (Maybe (DMap k v)))
1128+ , fanSubscribedSubscribers :: !(IORef (DMap k (FanSubscribedChildren x k v))) -- This DMap should never be empty
1129+ , fanSubscribedParent :: !(EventSubscription x)
5191130#ifdef DEBUG_NODEIDS
5201131 , fanSubscribedNodeId :: Int
5211132#endif
5221133 }
5231134
524−data Fan k
525− = Fan { fanParent :: !(Event (DMap k Identity))
526− , fanSubscribed :: !(IORef (Maybe (FanSubscribed k)))
1135+data Fan x k v
1136+ = Fan { fanParent :: !(Event x (DMap k v))
1137+ , fanSubscribed :: !(IORef (Maybe (FanSubscribed x k v)))
5271138 }
5281139
529−data SwitchSubscribed a
530− = SwitchSubscribed { switchSubscribedCachedSubscribed :: !(IORef (Maybe (SwitchSubscribed a)))
1140+data SwitchSubscribed x a
1141+ = SwitchSubscribed { switchSubscribedCachedSubscribed :: !(IORef (Maybe (SwitchSubscribed x a)))
5311142 , switchSubscribedOccurrence :: !(IORef (Maybe a))
5321143 , switchSubscribedHeight :: !(IORef Height)
533− , switchSubscribedSubscribers :: !(SubscriberList a)
534− , switchSubscribedOwnInvalidator :: {-# NOUNPACK #-} !Invalidator
535− , switchSubscribedOwnWeakInvalidator :: !(IORef (Weak Invalidator))
536− , switchSubscribedBehaviorParents :: !(IORef [SomeBehaviorSubscribed])
537− , switchSubscribedParent :: !(Behavior (Event a))
538− , switchSubscribedCurrentParent :: !(IORef (EventSubscription a))
539− , switchSubscribedWeakSelf :: !(IORef (Weak (SwitchSubscribed a)))
1144+ , switchSubscribedSubscribers :: !(WeakBag (Subscriber x a))
1145+ , switchSubscribedOwnInvalidator :: {-# NOUNPACK #-} !(Invalidator x)
1146+ , switchSubscribedOwnWeakInvalidator :: !(IORef (Weak (Invalidator x)))
1147+ , switchSubscribedBehaviorParents :: !(IORef [SomeBehaviorSubscribed x])
1148+ , switchSubscribedParent :: !(Behavior x (Event x a))
1149+ , switchSubscribedCurrentParent :: !(IORef (EventSubscription x))
1150+ , switchSubscribedWeakSelf :: !(IORef (Weak (SwitchSubscribed x a)))
5401151#ifdef DEBUG_NODEIDS
5411152 , switchSubscribedNodeId :: Int
5421153#endif
5431154 }
5441155
545−data Switch a
546− = Switch { switchParent :: !(Behavior (Event a))
547− , switchSubscribed :: !(IORef (Maybe (SwitchSubscribed a)))
1156+data Switch x a
1157+ = Switch { switchParent :: !(Behavior x (Event x a))
1158+ , switchSubscribed :: !(IORef (Maybe (SwitchSubscribed x a)))
5481159 }
5491160
1161+#ifdef USE_TEMPLATE_HASKELL
5501162{-# ANN CoincidenceSubscribed "HLint: ignore Redundant bracket" #-}
551−data CoincidenceSubscribed a
552− = CoincidenceSubscribed { coincidenceSubscribedCachedSubscribed :: !(IORef (Maybe (CoincidenceSubscribed a)))
1163+#endif
1164+data CoincidenceSubscribed x a
1165+ = CoincidenceSubscribed { coincidenceSubscribedCachedSubscribed :: !(IORef (Maybe (CoincidenceSubscribed x a)))
5531166 , coincidenceSubscribedOccurrence :: !(IORef (Maybe a))
554− , coincidenceSubscribedSubscribers :: !(SubscriberList a)
1167+ , coincidenceSubscribedSubscribers :: !(WeakBag (Subscriber x a))
5551168 , coincidenceSubscribedHeight :: !(IORef Height)
556− , coincidenceSubscribedOuter :: {-# NOUNPACK #-} (Subscriber (Event a))
557− , coincidenceSubscribedOuterParent :: !(EventSubscription (Event a))
558− , coincidenceSubscribedInnerParent :: !(IORef (Maybe (EventSubscribed a)))
559− , coincidenceSubscribedWeakSelf :: !(IORef (Weak (CoincidenceSubscribed a)))
1169+ , coincidenceSubscribedOuter :: {-# NOUNPACK #-} (Subscriber x (Event x a))
1170+ , coincidenceSubscribedOuterParent :: !(EventSubscription x)
1171+ , coincidenceSubscribedInnerParent :: !(IORef (Maybe (EventSubscribed x)))
1172+ , coincidenceSubscribedWeakSelf :: !(IORef (Weak (CoincidenceSubscribed x a)))
5601173#ifdef DEBUG_NODEIDS
5611174 , coincidenceSubscribedNodeId :: Int
5621175#endif
5631176 }
5641177
565−data Coincidence a
566− = Coincidence { coincidenceParent :: !(Event (Event a))
567− , coincidenceSubscribed :: !(IORef (Maybe (CoincidenceSubscribed a)))
1178+data Coincidence x a
1179+ = Coincidence { coincidenceParent :: !(Event x (Event x a))
1180+ , coincidenceSubscribed :: !(IORef (Maybe (CoincidenceSubscribed x a)))
5681181 }
5691182
570−data Subscriber a
571− = forall b. SubscriberPush (a -> ComputeM (Maybe b)) (PushSubscribed a b) --TODO: Why does this have the pushCompute in it?
572− | 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)
574− | forall k. (GCompare k, a ~ DMap k Identity) => SubscriberFan (FanSubscribed k)
575− | forall p b. (a ~ p b, R.Patch p) => SubscriberHold !(Hold p b)
576− | forall b. (a ~ Identity b) => SubscriberHoldIdentity !(Hold Identity b)
577− | SubscriberSwitch (SwitchSubscribed a)
578− | forall b. a ~ Event b => SubscriberCoincidenceOuter (CoincidenceSubscribed b)
579− | SubscriberCoincidenceInner (CoincidenceSubscribed a)
580− | SubscriberHandle
581−
582−data Event a
583− = forall k. GCompare k => EventRoot !(k a) !(Root k)
584− | EventNever
585− | forall b. EventPush !(Push b a)
586− | forall k. (GCompare k, a ~ DMap k Identity) => EventMerge !(Merge k)
587− | forall k. GCompare k => EventFan !(k a) !(Fan k)
588− | EventSwitch !(Switch a)
589− | EventCoincidence !(Coincidence a)
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− }
599−
600−data EventSubscribed a
601− = EventSubscribedRoot {-# NOUNPACK #-} (RootSubscribed a)
602− | EventSubscribedNever
603− | forall b. EventSubscribedPush !(PushSubscribed b a)
604− | forall k. (GCompare k, a ~ DMap k Identity) => EventSubscribedMerge !(MergeSubscribed k)
605− | forall k. GCompare k => EventSubscribedFan !(k a) !(FanSubscribed k)
606− | EventSubscribedSwitch !(SwitchSubscribed a)
607− | EventSubscribedCoincidence !(CoincidenceSubscribed a)
608−
609−unsubscribe :: EventSubscription a -> IO ()
610−unsubscribe (EventSubscription msln _) = forM_ msln $ \sln -> WeakBag.remove sln
611−
612−-- These function are constructor functions that are marked NOINLINE so they are
613−-- opaque to GHC. If we do not do this, then GHC will sometimes fuse the constructor away
614−-- so any weak references that are attached to the constructors will have their
615−-- finalizer run. Using the opaque constructor, does not see the
616−-- constructor application, so it behaves like an IORef and cannot be fused away.
617−--
618−-- The result is also evaluated to WHNF, since forcing a thunk invalidates
619−-- the weak pointer to it in some cases.
620−
621−--TODO: I think all of these noinlines are now unnecessary
622−{-# NOINLINE newSubscriberPush #-}
623−newSubscriberPush :: (a -> ComputeM (Maybe b)) -> PushSubscribed a b -> IO (Subscriber a)
624−newSubscriberPush compute subd = return $! SubscriberPush compute subd
625−
626−{-# RULES
627− "newSubscriberHold/Identity" forall h. newSubscriberHold h = newSubscriberHoldIdentity h
628− #-}
629−{-# NOINLINE newSubscriberHold #-}
630−newSubscriberHold :: R.Patch p => Hold p a -> IO (Subscriber (p a))
631−newSubscriberHold h = return $! SubscriberHold h
632−
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
1183+{-# NOINLINE newInvalidatorSwitch #-}
1184+newInvalidatorSwitch :: SwitchSubscribed x a -> IO (Invalidator x)
1185+newInvalidatorSwitch subd = return $! InvalidatorSwitch subd
6441186
645−{-# NOINLINE newSubscriberFan #-}
646−newSubscriberFan :: GCompare k => FanSubscribed k -> IO (Subscriber (DMap k Identity))
647−newSubscriberFan subd = return $! SubscriberFan subd
1187+{-# NOINLINE newInvalidatorPull #-}
1188+newInvalidatorPull :: Pull x a -> IO (Invalidator x)
1189+newInvalidatorPull p = return $! InvalidatorPull p
6481190
649−{-# NOINLINE newSubscriberSwitch #-}
650−newSubscriberSwitch :: SwitchSubscribed a -> IO (Subscriber a)
651−newSubscriberSwitch subd = return $! SubscriberSwitch subd
1191+instance HasSpiderTimeline x => Filterable (Event x) where
1192+ mapMaybe f = push $ return . f
6521193
653−{-# NOINLINE newSubscriberCoincidenceOuter #-}
654−newSubscriberCoincidenceOuter :: CoincidenceSubscribed b -> IO (Subscriber (Event b))
655−newSubscriberCoincidenceOuter subd = return $! SubscriberCoincidenceOuter subd
1194+instance HasSpiderTimeline x => Align (Event x) where
1195+ nil = eventNever
1196+#if MIN_VERSION_these(0, 8, 0)
1197+instance HasSpiderTimeline x => Semialign (Event x) where
1198+#endif
1199+ align ea eb = mapMaybe dmapToThese $ mergeG coerce $ dynamicConst $
1200+ DMap.fromDistinctAscList [LeftTag :=> ea, RightTag :=> eb]
6561201
657−{-# NOINLINE newSubscriberCoincidenceInner #-}
658−newSubscriberCoincidenceInner :: CoincidenceSubscribed a -> IO (Subscriber a)
659−newSubscriberCoincidenceInner subd = return $! SubscriberCoincidenceInner subd
1202+#ifdef MIN_VERSION_semialign
1203+#if MIN_VERSION_semialign(1,1,0)
1204+instance HasSpiderTimeline x => Zip (Event x) where
1205+#endif
1206+ zip x y = mapMaybe justThese $ align x y
1207+#endif
6601208
661−{-# NOINLINE newInvalidatorSwitch #-}
662−newInvalidatorSwitch :: SwitchSubscribed a -> IO Invalidator
663−newInvalidatorSwitch subd = return $! InvalidatorSwitch subd
1209+data DynType x p = UnsafeDyn !(BehaviorM x (PatchTarget p), Event x p)
1210+ | BuildDyn !(EventM x (PatchTarget p), Event x p)
1211+ | HoldDyn !(Hold x p)
6641212
665−{-# NOINLINE newInvalidatorPull #-}
666−newInvalidatorPull :: Pull a -> IO Invalidator
667−newInvalidatorPull p = return $! InvalidatorPull p
1213+newtype Dyn (x :: Type) p = Dyn { unDyn :: IORef (DynType x p) }
6681214
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]
1215+newMapDyn :: HasSpiderTimeline x => (a -> b) -> DynamicS x (Identity a) -> DynamicS x (Identity b)
1216+newMapDyn f d = dynamicDynIdentity $ unsafeBuildDynamic (fmap f $ readBehaviorTracked $ dynamicCurrent d) (Identity . f . runIdentity <$> dynamicUpdated d)
7131217
7141218--TODO: Avoid the duplication between this and R.zipDynWith
715−zipDynWith :: (a -> b -> c) -> Dynamic Identity a -> Dynamic Identity b -> Dynamic Identity c
1219+zipDynWith :: HasSpiderTimeline x => (a -> b -> c) -> DynamicS x (Identity a) -> DynamicS x (Identity b) -> DynamicS x (Identity c)
7161220zipDynWith f da db =
717− let eab = align (updated da) (updated db)
1221+ let eab = align (dynamicUpdated da) (dynamicUpdated db)
7181222 ec = flip push eab $ \o -> do
7191223 (a, b) <- case o of
7201224 This (Identity a) -> do
721− b <- readBehaviorUntracked $ current db
1225+ b <- readBehaviorUntracked $ dynamicCurrent db
7221226 return (a, b)
7231227 That (Identity b) -> do
724− a <- readBehaviorUntracked $ current da
1228+ a <- readBehaviorUntracked $ dynamicCurrent da
7251229 return (a, b)
7261230 These (Identity a) (Identity b) -> return (a, b)
7271231 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)) }
1232+ in dynamicDynIdentity $ unsafeBuildDynamic (f <$> readBehaviorUntracked (dynamicCurrent da) <*> readBehaviorUntracked (dynamicCurrent db)) ec
7411233
742−unsafeDyn :: BehaviorM a -> Event (p a) -> Dyn p a
743−unsafeDyn readV0 v' = Dyn $ unsafeNewIORef x $ Left x
744− where x = (readV0, v')
1234+buildDynamic :: (Defer (SomeDynInit x) m, Patch p) => EventM x (PatchTarget p) -> Event x p -> m (Dyn x p)
1235+buildDynamic readV0 v' = do
1236+ result <- liftIO $ newIORef $ BuildDyn (readV0, v')
1237+ let !d = Dyn result
1238+ defer $ SomeDynInit d
1239+ return d
7451240
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'
754−
755−--type role Behavior representational
756−data Behavior a
757− = forall p. BehaviorHold !(Hold p a)
758− | BehaviorHoldIdentity !(Hold Identity a)
759− | BehaviorConst !a
760− | BehaviorPull !(Pull a)
761− | BehaviorDynIdentity !(Dyn Identity a)
762− | forall p. R.Patch p => BehaviorDyn !(Dyn p a)
1241+unsafeBuildDynamic :: BehaviorM x (PatchTarget p) -> Event x p -> Dyn x p
1242+unsafeBuildDynamic readV0 v' =
1243+ Dyn $ unsafePerformIO $ newIORef $ UnsafeDyn (readV0, v')
7631244
7641245-- ResultM can read behaviors and events
7651246type ResultM = EventM
7661247
767−{-# NOINLINE unsafeNewIORef #-}
768−unsafeNewIORef :: a -> b -> IORef b
769−unsafeNewIORef _ b = unsafePerformIO $ newIORef b
770−
771−instance Functor Event where
1248+instance HasSpiderTimeline x => Functor (Event x) where
7721249 fmap f = push $ return . Just . f
7731250
774−instance Functor Behavior where
1251+instance Functor (Behavior x) where
7751252 fmap f = pull . fmap f . readBehaviorTracked
7761253
777−{-# NOINLINE push #-} --TODO: If this is helpful, we can get rid of the unsafeNewIORef and use unsafePerformIO directly
778−push :: forall a b. (a -> ComputeM (Maybe b)) -> Event a -> Event b
779−push f e = EventPush $ Push
780− { pushCompute = f
781− , pushParent = e
782− , pushSubscribed = unsafeNewIORef (f, e) Nothing --TODO: Does the use of the tuple here create unnecessary overhead?
783− }
784−-- DISABLED: {- RULES "push/push" forall f g e. push f (push g e) = push (maybe (return Nothing) f <=< g) e #-}
1254+{-# INLINE push #-}
1255+push :: HasSpiderTimeline x => (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
1256+push f e = cacheEvent (pushCheap f e)
7851257
786−{-# NOINLINE pull #-}
787−pull :: BehaviorM a -> Behavior a
788−pull a = BehaviorPull $ Pull
789− { pullCompute = a
790− , pullValue = unsafeNewIORef a Nothing
1258+{-# INLINABLE pull #-}
1259+pull :: BehaviorM x a -> Behavior x a
1260+pull a = unsafePerformIO $ do
1261+ ref <- newIORef Nothing
7911262#ifdef DEBUG_NODEIDS
792− , pullNodeId = unsafeNodeId a
1263+ nid <- newNodeId
7931264#endif
794− }
795−
796−{-# NOINLINE switch #-}
797−switch :: Behavior (Event a) -> Event a
798−switch a = EventSwitch $ Switch
799− { switchParent = a
800− , switchSubscribed = unsafeNewIORef a Nothing
801− }
1265+ pure $ behaviorPull $ Pull
1266+ { pullCompute = a
1267+ , pullValue = ref
1268+#ifdef DEBUG_NODEIDS
1269+ , pullNodeId = nid
1270+#endif
1271+ }
8021272
803−coincidence :: Event (Event a) -> Event a
804−coincidence a = EventCoincidence $ Coincidence
805− { coincidenceParent = a
806− , coincidenceSubscribed = unsafeNewIORef a Nothing
807− }
1273+{-# INLINABLE switch #-}
1274+switch :: HasSpiderTimeline x => Behavior x (Event x a) -> Event x a
1275+switch a = unsafePerformIO $ do
1276+ ref <- newIORef Nothing
1277+ pure $ eventSwitch $ Switch
1278+ { switchParent = a
1279+ , switchSubscribed = ref
1280+ }
8081281
809−propagateAndUpdateSubscribersRef :: SubscriberList a -> a -> EventM x ()
810−propagateAndUpdateSubscribersRef subscribersRef a = do
811− propagate a subscribersRef
1282+coincidence :: HasSpiderTimeline x => Event x (Event x a) -> Event x a
1283+coincidence a = unsafePerformIO $ do
1284+ ref <- newIORef Nothing
1285+ pure $ eventCoincidence $ Coincidence
1286+ { coincidenceParent = a
1287+ , coincidenceSubscribed = ref
1288+ }
8121289
8131290-- Propagate the given event occurrence; before cleaning up, run the given action, which may read the state of events and behaviors
814−run :: [DSum RootTrigger Identity] -> ResultM x b -> SpiderHost x b
1291+run :: forall x b. HasSpiderTimeline x => [DSum (RootTrigger x) Identity] -> ResultM x b -> SpiderHost x b
8151292run roots after = 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
1293+ tracePropagate (Proxy :: Proxy x) $ "Running an event frame with " <> show (length roots) <> " events"
1294+ let t = spiderTimeline :: SpiderTimelineEnv x
1295+ result <- SpiderHost $ withMVar (_spiderTimeline_lock (unSTE t)) $ \_ -> unSpiderHost $ runFrame $ do
8191296 rootsToPropagate <- forM roots $ \r@(RootTrigger (_, occRef, k) :=> a) -> do
8201297 occBefore <- liftIO $ do
8211298 occBefore <- readIORef occRef
@@ -826,43 +1303,40 @@ run roots after = do
8261303 return $ Just r
8271304 else return Nothing
8281305 forM_ (catMaybes rootsToPropagate) $ \(RootTrigger (subscribersRef, _, _) :=> Identity a) -> do
829− propagateAndUpdateSubscribersRef subscribersRef a
830− delayedRef <- EventM $ asks eventEnvDelayedMerges
1306+ propagate a subscribersRef
1307+ delayedRef <- asksEventEnv eventEnvDelayedMerges
8311308 let go = do
8321309 delayed <- liftIO $ readIORef delayedRef
8331310 case IntMap.minViewWithKey delayed of
8341311 Nothing -> return ()
8351312 Just ((currentHeight, cur), future) -> do
836− tracePropagate $ "Running height " ++ show currentHeight
1313+ tracePropagate (Proxy :: Proxy x) $ "Running height " ++ show currentHeight
8371314 putCurrentHeight $ Height currentHeight
8381315 liftIO $ writeIORef delayedRef $! future
839− forM_ cur $ \d -> case d of
840− DelayedMerge subscribed -> do
841− height <- liftIO $ readIORef $ mergeSubscribedHeight subscribed
842− case height `compare` Height currentHeight of
843− LT -> error "Somehow a merge's height has been decreased after it was scheduled"
844− GT -> scheduleMerge height subscribed -- The height has been increased (by a coincidence event; TODO: is this the only way?)
845− EQ -> do
846− m <- liftIO $ readIORef $ mergeSubscribedAccum subscribed
847− liftIO $ writeIORef (mergeSubscribedAccum subscribed) $! DMap.empty
848− --TODO: Assert that m is not empty
849− liftIO $ writeIORef (mergeSubscribedOccurrence subscribed) $ Just m
850− scheduleClear $ mergeSubscribedOccurrence subscribed
851− propagateAndUpdateSubscribersRef (mergeSubscribedSubscribers subscribed) m
1316+ sequence_ cur
8521317 go
8531318 go
8541319 putCurrentHeight maxBound
8551320 after
856− tracePropagate "Done running an event frame"
1321+ tracePropagate (Proxy :: Proxy x) "Done running an event frame"
8571322 return result
8581323
859−data SomeClear = forall a. SomeClear (IORef (Maybe a))
1324+scheduleMerge' :: HasSpiderTimeline x => Height -> IORef Height -> EventM x () -> EventM x ()
1325+scheduleMerge' initialHeight heightRef a = scheduleMerge initialHeight $ do
1326+ height <- liftIO $ readIORef heightRef
1327+ currentHeight <- getCurrentHeight
1328+ case height `compare` currentHeight of
1329+ LT -> error "Somehow a merge's height has been decreased after it was scheduled"
1330+ GT -> scheduleMerge' height heightRef a -- The height has been increased (by a coincidence event; TODO: is this the only way?)
1331+ EQ -> a
1332+
1333+newtype Clear a = Clear (IORef (Maybe a))
8601334
861−data SomeRootClear = forall k. SomeRootClear (IORef (DMap k Identity))
1335+newtype IntClear a = IntClear (IORef (IntMap a))
8621336
863−data SomeAssignment = forall a. SomeAssignment {-# UNPACK #-} !(IORef a) {-# UNPACK #-} !(IORef [Weak Invalidator]) a
1337+newtype RootClear k = RootClear (IORef (DMap k Identity))
8641338
865−data DelayedMerge = forall k. DelayedMerge (MergeSubscribed k)
1339+data SomeAssignment x = forall a. SomeAssignment {-# UNPACK #-} !(IORef a) {-# UNPACK #-} !(IORef [Weak (Invalidator x)]) a
8661340
8671341debugFinalize :: Bool
8681342debugFinalize = False
@@ -872,79 +1346,110 @@ mkWeakPtrWithDebug x debugNote = do
8721346 x' <- evaluate x
8731347 mkWeakPtr x' $
8741348 if debugFinalize
875− then Just $ putStrLn $ "finalizing: " ++ debugNote
1349+ then Just $ debugStrLn $ "finalizing: " ++ debugNote
8761350 else Nothing
8771351
8781352type WeakList a = [Weak a]
8791353
880−{-# INLINE withIncreasedDepth #-}
1354+type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
1355+
1356+
1357+
1358+
8811359#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
1360+
1361+debugSubscriber :: forall x a. HasSpiderTimeline x => String -> Subscriber x a -> IO (Subscriber x a)
1362+debugSubscriber description = return . debugSubscriber' description
1363+
1364+debugSubscriber' :: forall x a. HasSpiderTimeline x => String -> Subscriber x a -> Subscriber x a
1365+debugSubscriber' description subscribed = Subscriber
1366+ {
1367+ subscriberPropagate = \m -> do
1368+ tracePropagate (Proxy :: Proxy x) ("subscriberPropagate: " <> description)
1369+ subscriberPropagate subscribed m
1370+ , subscriberInvalidateHeight = \old -> do
1371+ traceInvalidateHeight $ "invalidateSubscriberHeight: " <> description <> ", old = " <> show (unHeight old)
1372+ subscriberInvalidateHeight subscribed old
1373+ traceInvalidateHeight $ "invalidateSubscriberHeight: " <> description <> ", done"
1374+ , subscriberRecalculateHeight = \new -> do
1375+ traceInvalidateHeight $ "subscriberRecalculateHeight: " <> description <> ", new = " <> show (unHeight new)
1376+ subscriberRecalculateHeight subscribed new
1377+ traceInvalidateHeight $ "subscriberRecalculateHeight: " <> description <> ", done"
1378+ }
1379+
1380+
1381+{-# INLINE withIncreasedDepth #-}
1382+withIncreasedDepth :: forall proxy x m a. CanTrace x m => proxy x -> m a -> m a
1383+withIncreasedDepth _ a = do
1384+ liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) succ
8861385 result <- a
887− liftIO $ modifyIORef' (_spiderEnv_depth spiderEnv) pred
1386+ liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) pred
8881387 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)
8951388
8961389{-# 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
1390+tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1391+tracePropagate p = when debugPropagate . trace p
9031392
9041393{-# INLINE traceInvalidate #-}
9051394traceInvalidate :: String -> IO ()
906−traceInvalidate = when debugInvalidate . liftIO . putStrLn
1395+traceInvalidate = when debugInvalidate . liftIO . debugStrLn
1396+
1397+{-# INLINE traceInvalidateHeight #-}
1398+traceInvalidateHeight :: String -> IO ()
1399+traceInvalidateHeight = when debugInvalidateHeight . liftIO . debugStrLn
9071400
908−{-# INLINE traceWhen #-}
909−traceWhen :: (CanTrace x m) => Bool -> String -> m ()
910−traceWhen b message = traceMWhen b $ return message
1401+{-# INLINE trace #-}
1402+trace :: (CanTrace x m) => proxy x -> String -> m ()
1403+trace p message = traceM p $ return message
9111404
912−{-# INLINE traceMWhen #-}
913−traceMWhen :: (CanTrace x m) => Bool -> m String -> m ()
914−traceMWhen b getMessage = when b $ do
1405+{-# INLINE traceM #-}
1406+traceM :: forall x proxy m. (CanTrace x m) => proxy x -> m String -> m ()
1407+traceM _ getMessage = do
9151408 message <- getMessage
916−#ifdef DEBUG
917− spiderEnv <- askSpiderEnv
918− d <- liftIO $ readIORef $ _spiderEnv_depth spiderEnv
1409+ d <- liftIO $ readIORef $ _spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)
1410+ liftIO $ debugStrLn $ replicate d ' ' <> message
1411+
9191412#else
920− let d = 0
1413+
1414+{-# INLINE withIncreasedDepth #-}
1415+withIncreasedDepth :: proxy x -> m a -> m a
1416+withIncreasedDepth _ = id
1417+
1418+{-# INLINE tracePropagate #-}
1419+tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1420+tracePropagate _ _ = return ()
1421+
1422+{-# INLINE traceInvalidate #-}
1423+traceInvalidate :: String -> IO ()
1424+traceInvalidate _ = return ()
1425+
1426+{-# INLINE traceInvalidateHeight #-}
1427+traceInvalidateHeight :: String -> IO ()
1428+traceInvalidateHeight _ = return ()
1429+
1430+{-# INLINE debugSubscriber #-}
1431+debugSubscriber :: String -> Subscriber x a -> IO (Subscriber x a)
1432+debugSubscriber _ = return
1433+
1434+{-# INLINE debugSubscriber' #-}
1435+debugSubscriber' :: String -> Subscriber x a -> Subscriber x a
1436+debugSubscriber' _ = id
1437+
1438+
1439+
1440+{-# INLINE trace #-}
1441+trace :: (CanTrace x m) => proxy x -> String -> m ()
1442+trace _ _ = return ()
1443+
1444+{-# INLINE traceM #-}
1445+traceM :: (CanTrace x m) => proxy x -> m String -> m ()
1446+traceM _ _ = return ()
1447+
9211448#endif
922− liftIO $ putStrLn $ replicate d ' ' <> message
9231449
9241450whoCreatedIORef :: IORef a -> IO [String]
9251451whoCreatedIORef (IORef a) = whoCreated $! a
9261452
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−
9481453groupByHead :: Eq a => [NonEmpty a] -> [(a, NonEmpty [a])]
9491454groupByHead = \case
9501455 [] -> []
@@ -955,537 +1460,278 @@ groupByHead = \case
9551460 | otherwise -> (x, xs :| []) : l
9561461
9571462listsToForest :: Eq a => [[a]] -> Forest a
958−listsToForest l = fmap (\(a, l') -> Node a $ listsToForest $ toList l') $ groupByHead $ catMaybes $ fmap nonEmpty l
1463+listsToForest lists = buildForest <$> groupByHead (mapMaybe nonEmpty lists)
1464+ where buildForest (a, lists') = Node a $ listsToForest $ toList lists'
1465+
1466+showStacks :: [[String]] -> String
1467+showStacks = drawForest . listsToForest . fmap (filterStack "Reflex.Spider.Internal")
1468+
1469+filterStack :: String -> [String] -> [String]
1470+#ifdef DEBUG_HIDE_INTERNALS
1471+filterStack prefix = filter (not . (prefix `isPrefixOf`))
1472+#else
1473+filterStack prefix = id
1474+#endif
1475+
1476+#ifdef DEBUG_CYCLES
1477+
1478+data EventLoopException = EventLoopException [[String]]
1479+instance Exception EventLoopException
1480+
1481+instance Show EventLoopException where
1482+ show (EventLoopException stacks) = "causality loop detected:\n" <> if null stacks
1483+ then "no location information, compile with profiling enabled for stack tree"
1484+ else showStacks stacks
1485+
1486+#else
1487+
1488+data EventLoopException = EventLoopException
1489+instance Exception EventLoopException
1490+
1491+instance Show EventLoopException where
1492+ show EventLoopException = "causality loop detected: \n" <>
1493+ "compile reflex with flag 'debug-cycles' and compile with profiling enabled for stack tree"
1494+
1495+#endif
9591496
960−-- | Propagate everything at the current height
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
969− case occ of
970− Nothing -> return () -- No need to write a Nothing back into the Ref
971− Just o -> do
972− liftIO $ writeIORef (pushSubscribedOccurrence subscribed) occ
973− scheduleClear $ pushSubscribedOccurrence subscribed
974− propagate o $ pushSubscribedSubscribers subscribed
975− SubscriberMerge k subscribed -> {-# SCC "traverseMerge" #-} do
976− tracePropagate $ "SubscriberMerge" <> showNodeId subscribed
977− oldM <- liftIO $ readIORef $ mergeSubscribedAccum subscribed
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
981− when (DMap.null oldM) $ do -- Only schedule the firing once
982− height <- liftIO $ readIORef $ mergeSubscribedHeight subscribed
983− --TODO: assertions about height
984− currentHeight <- getCurrentHeight
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)
993− scheduleMerge height subscribed
994− SubscriberMergeChange subscribed -> {-# SCC "traverseMergeChange" #-} do
995− tracePropagate $ "SubscriberMerge" <> showNodeId subscribed
996− defer $ SomeMergeUpdate a subscribed
997− SubscriberFan subscribed -> {-# SCC "traverseFan" #-} do
998− subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
999− tracePropagate $ "SubscriberFan" <> showNodeId subscribed <> ": " ++ show (DMap.size subs) ++ " keys subscribed, " ++ show (DMap.size a) ++ " keys firing"
1000− --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
1001− forM_ (DMap.toList a) $ \(k :=> Identity v) -> {-# SCC "SubscriberFan" #-} case DMap.lookup k subs of
1002− Nothing -> do
1003− tracePropagate "No subscriber for key"
1004− return ()
1005− Just subsubs -> do
1006− propagate v $ _fanSubscribedChildren_list subsubs
1007− return ()
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
1012− liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
1013− scheduleClear $ switchSubscribedOccurrence subscribed
1014− propagate a $ switchSubscribedSubscribers subscribed
1015− SubscriberCoincidenceOuter subscribed -> {-# SCC "traverseCoincidenceOuter" #-} do
1016− tracePropagate $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
1017− outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
1018− tracePropagate $ " outerHeight = " <> show outerHeight
1019− (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
1020− tracePropagate $ " isJust occ = " <> show (isJust occ)
1021− tracePropagate $ " innerHeight = " <> show innerHeight
1022− liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
1023− scheduleClear $ coincidenceSubscribedInnerParent subscribed
1024− case occ of
1025− Nothing -> do
1026− when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
1027− writeIORef (coincidenceSubscribedHeight subscribed) $! innerHeight
1028− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
1029− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
1030− Just o -> do -- Since it's already firing, no need to adjust height
1031− liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
1032− scheduleClear $ coincidenceSubscribedOccurrence 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"
10441497
10451498{-# INLINE propagateSubscriberHold #-}
1046−propagateSubscriberHold :: R.Patch p => Hold p a -> p a -> EventM x ()
1499+propagateSubscriberHold :: forall x p. (HasSpiderTimeline x, Patch p) => Hold x p -> p -> EventM x ()
10471500propagateSubscriberHold h a = do
1048− {-# SCC "trace" #-} traceMWhen debugPropagate $ liftIO $ do
1501+ {-# SCC "trace" #-} when debugPropagate $ traceM (Proxy :: Proxy x) $ liftIO $ do
10491502 invalidators <- liftIO $ readIORef $ holdInvalidators h
10501503 return $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
1504+
10511505 v <- {-# SCC "read" #-} liftIO $ readIORef $ holdValue h
1052− case {-# SCC "apply" #-} R.apply a v of
1506+ case {-# SCC "apply" #-} apply a v of
10531507 Nothing -> return ()
10541508 Just v' -> do
1055− {-# SCC "trace2" #-} withIncreasedDepth $ tracePropagate $ "propagateSubscriberHold: assigning Hold" <> showNodeId h
1509+ {-# SCC "trace2" #-} withIncreasedDepth (Proxy :: Proxy x) $
1510+ tracePropagate (Proxy :: Proxy x) ("propagateSubscriberHold: assigning Hold" <> showNodeId h)
10561511 vRef <- {-# SCC "vRef" #-} liftIO $ evaluate $ holdValue h
10571512 iRef <- {-# SCC "iRef" #-} liftIO $ evaluate $ holdInvalidators h
10581513 defer $ {-# SCC "assignment" #-} SomeAssignment vRef iRef v'
10591514
1060−data SomeResetCoincidence = forall a. SomeResetCoincidence !(EventSubscription a) !(Maybe (CoincidenceSubscribed a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
1061−
1062−{-# INLINE subscribeCoincidenceInner #-}
1063−subscribeCoincidenceInner :: CanSubscribe x m => Event a -> Height -> CoincidenceSubscribed a -> m (Maybe a, Height, EventSubscribed a)
1064−subscribeCoincidenceInner o outerHeight subscribedUnsafe = do
1065− subInner <- liftIO $ newSubscriberCoincidenceInner subscribedUnsafe
1066− subscription@(EventSubscription _ innerSubd) <- subscribe o subInner
1067− innerOcc <- liftIO $ readEventSubscribed innerSubd
1068− innerHeight <- liftIO $ readIORef $ eventSubscribedHeightRef innerSubd
1069− let height = max innerHeight outerHeight
1070− defer $ SomeResetCoincidence subscription $ if height > outerHeight then Just subscribedUnsafe else Nothing
1071− return (innerOcc, height, innerSubd)
1072−
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
1515+data SomeResetCoincidence x = forall a. SomeResetCoincidence !(EventSubscription x) !(Maybe (CoincidenceSubscribed x a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
10791516
1080−runBehaviorM :: BehaviorM a -> Maybe (Weak Invalidator, IORef [SomeBehaviorSubscribed]) -> IORef [SomeHoldInit] -> IO a
1081−runBehaviorM a mwi holdInits = runReaderT (unBehaviorM a) (mwi, holdInits)
1517+runBehaviorM :: BehaviorM x a -> Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]) -> IORef [SomeHoldInit x] -> IO a
1518+runBehaviorM a mwi holdInits = runReaderIO (unBehaviorM a) (mwi, holdInits)
10821519
1083−askInvalidator :: BehaviorM (Maybe (Weak Invalidator))
1520+askInvalidator :: BehaviorM x (Maybe (Weak (Invalidator x)))
10841521askInvalidator = do
1085− (!m, _) <- BehaviorM ask
1522+ (!m, _) <- ask
10861523 case m of
10871524 Nothing -> return Nothing
10881525 Just (!wi, _) -> return $ Just wi
10891526
1090−askParentsRef :: BehaviorM (Maybe (IORef [SomeBehaviorSubscribed]))
1527+askParentsRef :: BehaviorM x (Maybe (IORef [SomeBehaviorSubscribed x]))
10911528askParentsRef = 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
1101−
1102−readBehaviorTracked :: Behavior a -> BehaviorM a
1103−readBehaviorTracked b = case b of
1104− BehaviorHold h -> readHoldTracked h
1105− BehaviorHoldIdentity h -> readHoldTracked h
1106− BehaviorConst a -> return a
1107− BehaviorPull p -> do
1108− val <- liftIO $ readIORef $ pullValue p
1109− case val of
1110− Just subscribed -> do
1111− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
1112− askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (pullSubscribedInvalidators subscribed) (wi:))
1113− liftIO $ touch $ pullSubscribedOwnInvalidator subscribed
1114− return $ pullSubscribedValue subscribed
1115− Nothing -> do
1116− i <- liftIO $ newInvalidatorPull p
1117− wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorPull"
1118− parentsRef <- liftIO $ newIORef []
1119− holdInits <- askBehaviorHoldInits
1120− a <- liftIO $ runReaderT (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
1121− invsRef <- liftIO . newIORef . maybeToList =<< askInvalidator
1122− parents <- liftIO $ readIORef parentsRef
1123− let subscribed = PullSubscribed
1124− { pullSubscribedValue = a
1125− , pullSubscribedInvalidators = invsRef
1126− , pullSubscribedOwnInvalidator = i
1127− , pullSubscribedParents = parents
1128− }
1129− liftIO $ writeIORef (pullValue p) $ Just subscribed
1130− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
1131− 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
1529+ (!m, _) <- ask
1530+ case m of
1531+ Nothing -> return Nothing
1532+ Just (_, !p) -> return $ Just p
1533+
1534+askBehaviorHoldInits :: BehaviorM x (IORef [SomeHoldInit x])
1535+askBehaviorHoldInits = do
1536+ (_, !his) <- ask
1537+ return his
11421538
11431539{-# INLINE getDynHold #-}
1144−getDynHold :: (Defer SomeHoldInit m, R.Patch p) => Dyn p a -> m (Hold p a)
1540+getDynHold :: (Defer (SomeHoldInit x) m, Patch p) => Dyn x p -> m (Hold x p)
11451541getDynHold d = do
11461542 mh <- liftIO $ readIORef $ unDyn d
11471543 case mh of
1148− Right h -> return h
1149− Left (readV0, v') -> do
1544+ HoldDyn h -> return h
1545+ UnsafeDyn (readV0, v') -> do
11501546 holdInits <- getDeferralQueue
11511547 v0 <- liftIO $ runBehaviorM readV0 Nothing holdInits
1548+ hold' v0 v'
1549+ BuildDyn (readV0, v') -> do
1550+ v0 <- liftIO $ runEventM readV0
1551+ hold' v0 v'
1552+ where
1553+ hold' v0 v' = do
11521554 h <- hold v0 v'
1153− liftIO $ writeIORef (unDyn d) $ Right h
1555+ liftIO $ writeIORef (unDyn d) $ HoldDyn h
11541556 return h
11551557
1156−readEventSubscribed :: EventSubscribed a -> IO (Maybe a)
1157−readEventSubscribed = \case
1158− EventSubscribedRoot rs -> readRootSubscribed rs
1159− EventSubscribedNever -> return Nothing
1160− EventSubscribedPush ps -> readPushSubscribed ps
1161− EventSubscribedMerge ms -> readMergeSubscribed ms
1162− EventSubscribedFan k fs -> readFanSubscribed k fs
1163− EventSubscribedSwitch ss -> readSwitchSubscribed ss
1164− EventSubscribedCoincidence cs -> readCoincidenceSubscribed cs
1165−
1166−readRootSubscribed :: RootSubscribed a -> IO (Maybe a)
1167−readRootSubscribed = rootSubscribedOccurrence
1168−
1169−readPushSubscribed :: PushSubscribed b a -> IO (Maybe a)
1170−readPushSubscribed subscribed = do
1171− result <- readIORef $ pushSubscribedOccurrence subscribed -- Since ResultM is always called after the final height is reached, this will always be valid
1172− touch $ pushSubscribedSelf subscribed
1173− return result
1174−
1175−readMergeSubscribed :: MergeSubscribed k -> IO (Maybe (DMap k Identity))
1176−readMergeSubscribed subscribed = do
1177− result <- readIORef $ mergeSubscribedOccurrence subscribed
1178− touch $ mergeSubscribedParents subscribed
1179− return result
1180−
1181−readFanSubscribed :: GCompare k => k a -> FanSubscribed k -> IO (Maybe a)
1182−readFanSubscribed k fs = do
1183− parentOcc <- readEventSubscribed $ _eventSubscription_subscribed $ fanSubscribedParent fs
1184− return $ coerce $ DMap.lookup k =<< parentOcc
1185−
1186−readSwitchSubscribed :: SwitchSubscribed a -> IO (Maybe a)
1187−readSwitchSubscribed subscribed = do
1188− result <- readIORef $ switchSubscribedOccurrence subscribed
1189− touch $ switchSubscribedOwnInvalidator subscribed
1190− return result
1191−
1192−readCoincidenceSubscribed :: CoincidenceSubscribed a -> IO (Maybe a)
1193−readCoincidenceSubscribed subscribed = do
1194− result <- readIORef $ coincidenceSubscribedOccurrence subscribed
1195− touch $ coincidenceSubscribedOuter subscribed
1196− --TODO: do we need to touch the inner subscriber?
1197− return result
11981558
11991559-- Always refers to 0
12001560{-# NOINLINE zeroRef #-}
12011561zeroRef :: IORef Height
12021562zeroRef = unsafePerformIO $ newIORef zeroHeight
12031563
1204−{-# SPECIALIZE subscribe :: Event a -> Subscriber a -> EventM x (EventSubscription a) #-}
1205−subscribe :: forall x m a. CanSubscribe x m => Event a -> Subscriber a -> m (EventSubscription a)
1206−subscribe e sub = case e of
1207− EventRoot k r -> wrap EventSubscribedRoot $ liftIO . getRootSubscribed k r
1208− EventNever -> return $ EventSubscription Nothing EventSubscribedNever
1209− EventPush p -> wrap EventSubscribedPush $ getPushSubscribed p
1210− EventFan k f -> wrap (EventSubscribedFan k) $ getFanSubscribed k f
1211− EventMerge m -> wrap EventSubscribedMerge $ getMergeSubscribed m
1212− EventSwitch s -> wrap EventSubscribedSwitch $ getSwitchSubscribed s
1213− EventCoincidence c -> wrap EventSubscribedCoincidence $ getCoincidenceSubscribed c
1214− EventHold h -> subscribeHoldEvent h sub
1215− EventDyn j -> getDynHold j >>= \h -> subscribeHoldEvent h sub
1216− EventHoldIdentity h -> subscribeHoldEvent h sub
1217− EventDynIdentity j -> getDynHold j >>= \h -> subscribeHoldEvent h sub
1218− where
1219− wrap :: (t -> EventSubscribed a) -> (Subscriber a -> m (SubscriberListTicket a, t)) -> m (EventSubscription a)
1220− wrap tag getSpecificSubscribed = do
1221− (sln, subd) <- getSpecificSubscribed sub
1222− return $ EventSubscription (Just sln) $ tag subd
1223−
1224−{-# INLINE subscribeHoldEvent #-}
1225−subscribeHoldEvent :: (CanSubscribe x m, R.Patch p) => Hold p a -> Subscriber (p a) -> m (EventSubscription (p a))
1226−subscribeHoldEvent h sub = do
1227− EventSubscription _ subd <- getHoldEventSubscription h
1228− sln <- liftIO $ subscribeEventSubscribed subd sub
1229− return $ EventSubscription sln subd
1230−
1231−{-# INLINE debugSubscribe #-}
1232−debugSubscribe :: Bool
1233−debugSubscribe = False
1234−
1235−{-# INLINE subscribeEventSubscribed #-}
1236−subscribeEventSubscribed :: EventSubscribed a -> Subscriber a -> IO (Maybe (SubscriberListTicket a))
1237−subscribeEventSubscribed es sub = case es of
1238− EventSubscribedRoot r -> do
1239− traceSubscribe $ "subscribeEventSubscribed Root"
1240− Just <$> subscribeRootSubscribed r sub
1241− EventSubscribedNever -> do
1242− traceSubscribe $ "subscribeEventSubscribed Never"
1243− return Nothing
1244− EventSubscribedPush subscribed -> do
1245− traceSubscribe $ "subscribeEventSubscribed Push"
1246− Just <$> subscribePushSubscribed subscribed sub
1247− EventSubscribedFan k subscribed -> do
1248− traceSubscribe $ "subscribeEventSubscribed Fan"
1249− Just <$> subscribeFanSubscribed k subscribed sub
1250− EventSubscribedMerge subscribed -> do
1251− traceSubscribe $ "subscribeEventSubscribed Merge"
1252− Just <$> subscribeMergeSubscribed subscribed sub
1253− EventSubscribedSwitch subscribed -> do
1254− traceSubscribe $ "subscribeEventSubscribed Switch"
1255− Just <$> subscribeSwitchSubscribed subscribed sub
1256− EventSubscribedCoincidence subscribed -> do
1257− traceSubscribe $ "subscribeEventSubscribed Coincidence"
1258− Just <$> subscribeCoincidenceSubscribed subscribed sub
1259−
1260−{-# INLINE eventSubscribedHeightRef #-}
1261−eventSubscribedHeightRef :: EventSubscribed a -> IORef Height
1262−eventSubscribedHeightRef = \case
1263− EventSubscribedRoot _ -> zeroRef
1264− EventSubscribedNever -> zeroRef
1265− EventSubscribedPush subscribed -> pushSubscribedHeight subscribed
1266− EventSubscribedFan _ subscribed -> eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
1267− EventSubscribedMerge subscribed -> mergeSubscribedHeight subscribed
1268− EventSubscribedSwitch subscribed -> switchSubscribedHeight subscribed
1269− EventSubscribedCoincidence subscribed -> coincidenceSubscribedHeight subscribed
1270−
1271−{-# INLINE eventSubscribedHasOwnHeightRef #-}
1272−eventSubscribedHasOwnHeightRef :: EventSubscribed a -> Bool
1273−eventSubscribedHasOwnHeightRef = \case
1274− EventSubscribedRoot _ -> False
1275− EventSubscribedNever -> False
1276− EventSubscribedPush _ -> False
1277− EventSubscribedFan _ _ -> False
1278− EventSubscribedMerge _ -> True
1279− EventSubscribedSwitch _ -> True
1280− EventSubscribedCoincidence _ -> True
1281−
1282−{-# INLINE eventSubscribedGetParents #-}
1283−eventSubscribedGetParents :: EventSubscribed a -> IO [Some EventSubscribed]
1284−eventSubscribedGetParents = \case
1285− EventSubscribedRoot _ -> return []
1286− EventSubscribedNever -> return []
1287− EventSubscribedPush subscribed -> return [Some.This $ _eventSubscription_subscribed $ pushSubscribedParent subscribed]
1288− EventSubscribedFan _ subscribed -> return [Some.This $ _eventSubscription_subscribed $ fanSubscribedParent subscribed]
1289− EventSubscribedMerge subscribed -> do
1290− ps <- readIORef $ mergeSubscribedParents subscribed
1291− return $ R.ffor (DMap.toList ps) $ \(_ :=> v) -> Some.This $ _eventSubscription_subscribed $ mergeSubscribedParentSubscription v
1292− EventSubscribedSwitch subscribed -> do
1293− s <- readIORef $ switchSubscribedCurrentParent subscribed
1294− return [Some.This $ _eventSubscription_subscribed s]
1295− EventSubscribedCoincidence subscribed -> do
1296− innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
1297− let outerParent = Some.This $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
1298− innerParents = maybeToList $ fmap Some.This innerSubscription
1299− return $ outerParent : innerParents
1300−
1301−type CanSubscribe x m =
1302− ( HasSpiderEnv x m
1303− , HasCurrentHeight m
1304− , Defer SomeHoldInit m, Defer SomeMergeInit m -- The things we need to lazily initialize state
1305− , Defer SomeClear m -- Wiping out event firings
1306− , Defer SomeAssignment m -- Updating state
1307− , Defer SomeResetCoincidence m
1308− )
1309−
1310−getRootSubscribed :: GCompare k => k a -> Root k -> Subscriber a -> IO (SubscriberListTicket a, RootSubscribed a)
1564+getRootSubscribed :: forall k x a. (GCompare k, HasSpiderTimeline x) => k a -> Root x k -> Subscriber x a -> IO (WeakBagTicket, RootSubscribed x a, Maybe a)
13111565getRootSubscribed k r sub = do
13121566 mSubscribed <- readIORef $ rootSubscribed r
1567+ let getOcc = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
13131568 case DMap.lookup k mSubscribed of
13141569 Just subscribed -> {-# SCC "hitRoot" #-} do
13151570 sln <- subscribeRootSubscribed subscribed sub
1316− return (sln, subscribed)
1571+ occ <- getOcc
1572+ return (sln, subscribed, occ)
13171573 Nothing -> {-# SCC "missRoot" #-} do
13181574 weakSelf <- newIORef $ error "getRootSubscribed: weakSelfRef not initialized"
13191575 let !cached = rootSubscribed r
13201576 uninitRef <- newIORef $ error "getRootsubscribed: uninitRef not initialized"
13211577 (subs, sln) <- WeakBag.singleton sub weakSelf cleanupRootSubscribed
1322− when debugPropagate $ putStrLn $ "getRootSubscribed: calling rootInit"
1578+
1579+ tracePropagate (Proxy::Proxy x) $ "getRootSubscribed: calling rootInit"
1580+
13231581 uninit <- rootInit r k $ RootTrigger (subs, rootOccurrence r, k)
13241582 writeIORef uninitRef $! uninit
1325− let subscribed = RootSubscribed
1583+#ifdef DEBUG_NODEIDS
1584+ nid <- newNodeId
1585+#endif
1586+ let !subscribed = RootSubscribed
13261587 { rootSubscribedKey = k
13271588 , rootSubscribedCachedSubscribed = cached
1328− , rootSubscribedOccurrence = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
1589+ , rootSubscribedOccurrence = getOcc
13291590 , rootSubscribedSubscribers = subs
13301591 , rootSubscribedUninit = uninit
13311592 , rootSubscribedWeakSelf = weakSelf
13321593#ifdef DEBUG_NODEIDS
1333− , rootSubscribedNodeId = unsafeNodeId (k, r, subs)
1594+ , rootSubscribedNodeId = nid
13341595#endif
13351596 }
1336− writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "RootSubscribed"
1597+ -- If we die at the same moment that all our children die, they will
1598+ -- try to clean us up but will fail because their Weak reference to us
1599+ -- will also be dead. So, if we are dying, check if there are any
1600+ -- children; since children don't bother cleaning themselves up if
1601+ -- their parents are already dead, I don't think there's a race
1602+ -- condition here. However, if there are any children, then we can
1603+ -- infer that we need to clean ourselves up, so we do.
1604+ finalCleanup = do
1605+ cs <- readIORef $ _weakBag_children subs
1606+ when (not $ IntMap.null cs) (cleanupRootSubscribed subscribed)
1607+ writeIORef weakSelf =<< evaluate =<< mkWeakPtr subscribed (Just finalCleanup)
13371608 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
1338− return (sln, subscribed)
1609+ occ <- getOcc
1610+ return (sln, subscribed, occ)
13391611
1612+#ifdef USE_TEMPLATE_HASKELL
13401613{-# ANN cleanupRootSubscribed "HLint: ignore Redundant bracket" #-}
1341−cleanupRootSubscribed :: RootSubscribed a -> IO ()
1342−cleanupRootSubscribed self@(RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached }) = do
1614+#endif
1615+cleanupRootSubscribed :: RootSubscribed x a -> IO ()
1616+cleanupRootSubscribed self@RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached } = do
13431617 rootSubscribedUninit self
13441618 modifyIORef' cached $ DMap.delete k
13451619
13461620{-# INLINE subscribeRootSubscribed #-}
1347−subscribeRootSubscribed :: RootSubscribed a -> Subscriber a -> IO (SubscriberListTicket a)
1621+subscribeRootSubscribed :: RootSubscribed x a -> Subscriber x a -> IO WeakBagTicket
13481622subscribeRootSubscribed subscribed sub = WeakBag.insert sub (rootSubscribedSubscribers subscribed) (rootSubscribedWeakSelf subscribed) cleanupRootSubscribed
13491623
1350−-- When getPushSubscribed returns, the PushSubscribed returned will have a fully filled-in
1351−{-# SPECIALIZE getPushSubscribed :: Push a b -> Subscriber b -> EventM x (SubscriberListTicket b, PushSubscribed a b) #-}
1352−getPushSubscribed :: CanSubscribe x m => Push a b -> Subscriber b -> m (SubscriberListTicket b, PushSubscribed a b)
1353−getPushSubscribed p sub = do
1354− mSubscribed <- liftIO $ readIORef $ pushSubscribed p
1355− case mSubscribed of
1356− Just subscribed -> {-# SCC "hitPush" #-} do
1357− sln <- liftIO $ subscribePushSubscribed subscribed sub
1358− return (sln, subscribed)
1359− Nothing -> {-# SCC "missPush" #-} do -- Not yet subscribed
1360− subscribedRef <- liftIO $ newIORef $ error "getPushSubscribed: subscribed not yet intialized"
1361− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1362− s <- liftIO $ newSubscriberPush (pushCompute p) subscribedUnsafe
1363− subscription@(EventSubscription _ subd) <- subscribe (pushParent p) s
1364− parentOcc <- liftIO $ readEventSubscribed subd
1365− occ <- runComputeM $ join <$> mapM (pushCompute p) parentOcc
1366− occRef <- liftIO $ newIORef occ
1367− when (isJust occ) $ scheduleClear occRef
1368− weakSelf <- liftIO $ newIORef $ error "getPushSubscribed: weakSelf not initialized"
1369− let !cached = pushSubscribed p
1370− (subs, sln) <- liftIO $ WeakBag.singleton sub weakSelf cleanupPushSubscribed
1371− let subscribed = PushSubscribed
1372− { pushSubscribedCachedSubscribed = cached
1373− , pushSubscribedOccurrence = occRef
1374− , pushSubscribedHeight = eventSubscribedHeightRef subd -- Since pushes have the same height as their parents, share the ref
1375− , pushSubscribedSubscribers = subs
1376− , pushSubscribedSelf = s
1377− , pushSubscribedWeakSelf = weakSelf
1378− , pushSubscribedParent = subscription
1624+newtype EventSelectorInt x a = EventSelectorInt { selectInt :: Int -> Event x a }
1625+
1626+data FanInt x a = FanInt
1627+ { _fanInt_subscribers :: {-# UNPACK #-} !(FastMutableIntMap (FastWeakBag (Subscriber x a))) --TODO: Clean up the keys in here when their child weak bags get empty --TODO: Remove our own subscription when the subscribers list is completely empty
1628+ , _fanInt_subscriptionRef :: {-# UNPACK #-} !(IORef (EventSubscription x)) -- This should have a valid subscription iff subscribers is non-empty
1629+ , _fanInt_occRef :: {-# UNPACK #-} !(IORef (IntMap a))
13791630#ifdef DEBUG_NODEIDS
1380− , pushSubscribedNodeId = unsafeNodeId p
1631+ , _fanInt_nodeId :: {-# UNPACK #-} !Int
13811632#endif
1382− }
1383− liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "PushSubscribed"
1384− liftIO $ writeIORef subscribedRef $! subscribed
1385− liftIO $ writeIORef (pushSubscribed p) $ Just subscribed
1386− return (sln, subscribed)
1387−
1388−cleanupPushSubscribed :: PushSubscribed a b -> IO ()
1389−cleanupPushSubscribed self = do
1390− unsubscribe $ pushSubscribedParent self
1391− writeIORef (pushSubscribedCachedSubscribed self) $ Nothing
1392−
1393−{-# INLINE subscribePushSubscribed #-}
1394−subscribePushSubscribed :: PushSubscribed a b -> Subscriber b -> IO (SubscriberListTicket b)
1395−subscribePushSubscribed subscribed sub = WeakBag.insert sub (pushSubscribedSubscribers subscribed) (pushSubscribedWeakSelf subscribed) cleanupPushSubscribed
1396−
1397−{-# SPECIALIZE getMergeSubscribed :: GCompare k => Merge k -> Subscriber (DMap k Identity) -> EventM x (SubscriberListTicket (DMap k Identity), MergeSubscribed k) #-}
1398−getMergeSubscribed :: forall x k m. (CanSubscribe x m, GCompare k) => Merge k -> Subscriber (DMap k Identity) -> m (SubscriberListTicket (DMap k Identity), MergeSubscribed k)
1399−getMergeSubscribed m sub = do
1400− mSubscribed <- liftIO $ readIORef $ mergeSubscribed m
1401− case mSubscribed of
1402− Just subscribed -> {-# SCC "hitMerge" #-} do
1403− sln <- liftIO $ subscribeMergeSubscribed subscribed sub
1404− return (sln, subscribed)
1405− Nothing -> {-# SCC "missMerge" #-} do
1406− subscribedRef <- liftIO $ newIORef $ error "getMergeSubscribed: subscribedRef not yet initialized"
1407− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1408− initialParents <- readBehaviorUntracked $ current $ mergeParents m
1409− subscribers :: [(Maybe (DSum k Identity), Height, DSum k (MergeSubscribedParent k))] <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1410− s <- liftIO $ newSubscriberMerge k subscribedUnsafe
1411− subscription@(EventSubscription _ parentSubd) <- subscribe e s
1412− parentOcc <- liftIO $ readEventSubscribed parentSubd
1413− height <- liftIO $ readIORef $ eventSubscribedHeightRef parentSubd
1414− return $ (fmap (\x -> k :=> Identity x) parentOcc, height, k :=> MergeSubscribedParent subscription s)
1415− let dm = DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1416− heights = fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1417− myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
1418− myHeight = if invalidHeight `elem` heights
1419− then invalidHeight
1420− else succHeight $ heightBagMax myHeightBag
1421− currentHeight <- getCurrentHeight
1422− let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
1423− then (if DMap.null dm then Nothing else Just dm, DMap.empty)
1424− else (Nothing, dm)
1425− unless (DMap.null accum) $ do
1426− scheduleMerge myHeight subscribedUnsafe
1427− occRef <- liftIO $ newIORef occ
1428− when (isJust occ) $ scheduleClear occRef
1429− accumRef <- liftIO $ newIORef accum
1430− heightRef <- liftIO $ newIORef myHeight
1431− heightMapRef <- liftIO $ newIORef myHeightBag
1432− weakSelf <- liftIO $ newIORef $ error "getMergeSubscribed: weakSelf not yet initialized"
1433− (subs, sln) <- liftIO $ WeakBag.singleton sub weakSelf cleanupMergeSubscribed
1434− changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
1435− parentsRef <- liftIO $ newIORef $ DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1436− let !subscribed = MergeSubscribed
1437− { mergeSubscribedCachedSubscribed = mergeSubscribed m
1438− , mergeSubscribedOccurrence = occRef
1439− , mergeSubscribedAccum = accumRef
1440− , mergeSubscribedHeight = heightRef
1441− , mergeSubscribedHeightBag = heightMapRef
1442− , mergeSubscribedSubscribers = subs
1443− , mergeSubscribedChange = changeSubdRef
1444− , mergeSubscribedParents = parentsRef
1445− , mergeSubscribedWeakSelf = weakSelf
1633+ }
1634+
1635+newFanInt :: IO (FanInt x a)
1636+newFanInt = do
1637+ subscribers <- FastMutableIntMap.newEmpty --TODO: Clean up the keys in here when their child weak bags get empty --TODO: Remove our own subscription when the subscribers list is completely empty
1638+ subscriptionRef <- newIORef $ error "fanInt: no subscription"
1639+ occRef <- newIORef $ error "fanInt: no occurrence"
14461640#ifdef DEBUG_NODEIDS
1447− , mergeSubscribedNodeId = unsafeNodeId m
1641+ nodeId <- newNodeId
14481642#endif
1449− }
1450− defer $ SomeMergeInit subscribed $ updated $ mergeParents m
1451− liftIO $ writeIORef subscribedRef $! subscribed
1452− liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "MergeSubscribed"
1453− liftIO $ writeIORef (mergeSubscribed m) $ Just subscribed
1454− return (sln, subscribed)
1455−
1456−cleanupMergeSubscribed :: MergeSubscribed k -> IO ()
1457−cleanupMergeSubscribed subscribed = do
1458− parents <- readIORef $ mergeSubscribedParents subscribed
1459− forM_ (DMap.toList parents) $ \(_ :=> msp) -> unsubscribe $ mergeSubscribedParentSubscription msp
1460− -- Not necessary, because this whole MergeSubscribed is dead: writeIORef (mergeSubscribedParents subscribed) DMap.empty
1461− writeIORef (mergeSubscribedCachedSubscribed subscribed) $ Nothing -- Get rid of the cached subscribed
1462−
1463−{-# INLINE subscribeMergeSubscribed #-}
1464−subscribeMergeSubscribed :: MergeSubscribed k -> Subscriber (DMap k Identity) -> IO (SubscriberListTicket (DMap k Identity))
1465−subscribeMergeSubscribed subscribed sub = WeakBag.insert sub (mergeSubscribedSubscribers subscribed) (mergeSubscribedWeakSelf subscribed) cleanupMergeSubscribed
1466−
1467−{-# SPECIALIZE getFanSubscribed :: GCompare k => k a -> Fan k -> Subscriber a -> EventM x (SubscriberListTicket a, FanSubscribed k) #-}
1468−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)
1643+ return $ FanInt
1644+ { _fanInt_subscribers = subscribers
1645+ , _fanInt_subscriptionRef = subscriptionRef
1646+ , _fanInt_occRef = occRef
1647+#ifdef DEBUG_NODEIDS
1648+ , _fanInt_nodeId = nodeId
1649+#endif
1650+ }
1651+
1652+fanInt :: HasSpiderTimeline x => Event x (IntMap a) -> EventSelectorInt x a
1653+fanInt p = unsafePerformIO $ do
1654+ self <- newFanInt
1655+ pure $ EventSelectorInt $ \k -> Event $ \sub -> do
1656+ isEmpty <- liftIO $ FastMutableIntMap.isEmpty (_fanInt_subscribers self)
1657+ when isEmpty $ do -- This is the first subscriber, so we need to subscribe to our input
1658+ let desc = "fanInt" <> showNodeId self <> ", k = " <> show k
1659+ (subscription, parentOcc) <- subscribeAndRead p $ debugSubscriber' desc $ Subscriber
1660+ { subscriberPropagate = \m -> do
1661+ liftIO $ writeIORef (_fanInt_occRef self) m
1662+ scheduleIntClear $ _fanInt_occRef self
1663+ FastMutableIntMap.forIntersectionWithImmutable_ (_fanInt_subscribers self) m $ \b v -> --TODO: Do we need to know that no subscribers are being added as we traverse?
1664+ FastWeakBag.traverse_ b $ \s ->
1665+ subscriberPropagate s v
1666+ , subscriberInvalidateHeight = \old ->
1667+ FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1668+ FastWeakBag.traverse_ b $ \s ->
1669+ subscriberInvalidateHeight s old
1670+ , subscriberRecalculateHeight = \new ->
1671+ FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1672+ FastWeakBag.traverse_ b $ \s ->
1673+ subscriberRecalculateHeight s new
1674+ }
1675+ liftIO $ do
1676+ writeIORef (_fanInt_subscriptionRef self) subscription
1677+ writeIORef (_fanInt_occRef self) $ fromMaybe IntMap.empty parentOcc
1678+ scheduleIntClear $ _fanInt_occRef self
1679+ liftIO $ do
1680+ b <- FastMutableIntMap.lookup (_fanInt_subscribers self) k >>= \case
1681+ Nothing -> do
1682+ b <- FastWeakBag.empty
1683+ FastMutableIntMap.insert (_fanInt_subscribers self) k b
1684+ return b
1685+ Just b -> return b
1686+ ticket <- liftIO $ FastWeakBag.insert sub b
1687+ currentOcc <- readIORef (_fanInt_occRef self)
1688+
1689+ subscribed <- fanIntSubscribed ticket self
1690+ return (EventSubscription (FastWeakBag.remove ticket) subscribed, IntMap.lookup k currentOcc)
1691+
1692+fanIntSubscribed :: FastWeakBagTicket k -> FanInt x a -> IO (EventSubscribed x)
1693+fanIntSubscribed ticket self = do
1694+ subscribedParent <- _eventSubscription_subscribed <$> readIORef (_fanInt_subscriptionRef self)
1695+ return $ EventSubscribed
1696+ { eventSubscribedHeightRef = eventSubscribedHeightRef subscribedParent
1697+ , eventSubscribedRetained = toAny (_fanInt_subscriptionRef self, ticket)
1698+#ifdef DEBUG_CYCLES
1699+ , eventSubscribedGetParents = return [subscribedParent]
1700+ , eventSubscribedHasOwnHeightRef = False
1701+ , eventSubscribedWhoCreated = whoCreatedIORef $ _fanInt_subscriptionRef self
1702+#endif
1703+ }
1704+
1705+
1706+{-# INLINABLE getFanSubscribed #-}
1707+getFanSubscribed :: (HasSpiderTimeline x, GCompare k) => k a -> Fan x k v -> Subscriber x (v a) -> EventM x (WeakBagTicket, FanSubscribed x k v, Maybe (v a))
14691708getFanSubscribed k f sub = do
14701709 mSubscribed <- liftIO $ readIORef $ fanSubscribed f
14711710 case mSubscribed of
1472− Just subscribed -> {-# SCC "hitFan" #-} do
1473− sln <- liftIO $ subscribeFanSubscribed k subscribed sub
1474− return (sln, subscribed)
1711+ Just subscribed -> {-# SCC "hitFan" #-} liftIO $ do
1712+ sln <- subscribeFanSubscribed k subscribed sub
1713+ occ <- readIORef $ fanSubscribedOccurrence subscribed
1714+ return (sln, subscribed, coerce $ DMap.lookup k =<< occ)
14751715 Nothing -> {-# SCC "missFan" #-} do
14761716 subscribedRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribedRef not yet initialized"
14771717 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
14781718 s <- liftIO $ newSubscriberFan subscribedUnsafe
1479− subscription <- subscribe (fanParent f) s
1719+ (subscription, parentOcc) <- subscribeAndRead (fanParent f) s
14801720 weakSelf <- liftIO $ newIORef $ error "getFanSubscribed: weakSelf not yet initialized"
14811721 (subsForK, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupFanSubscribed
14821722 subscribersRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribersRef not yet initialized"
1723+ occRef <- liftIO $ newIORef parentOcc
1724+ when (isJust parentOcc) $ scheduleClear occRef
1725+#ifdef DEBUG_NODEIDS
1726+ nid <- liftIO newNodeId
1727+#endif
14831728 let subscribed = FanSubscribed
14841729 { fanSubscribedCachedSubscribed = fanSubscribed f
1730+ , fanSubscribedOccurrence = occRef
14851731 , fanSubscribedParent = subscription
14861732 , fanSubscribedSubscribers = subscribersRef
14871733#ifdef DEBUG_NODEIDS
1488− , fanSubscribedNodeId = unsafeNodeId f
1734+ , fanSubscribedNodeId = nid
14891735#endif
14901736 }
14911737 let !self = (k, subscribed)
@@ -1493,9 +1739,9 @@ getFanSubscribed k f sub = do
14931739 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug self "FanSubscribed"
14941740 liftIO $ writeIORef subscribedRef $! subscribed
14951741 liftIO $ writeIORef (fanSubscribed f) $ Just subscribed
1496− return (slnForSub, subscribed)
1742+ return (slnForSub, subscribed, coerce $ DMap.lookup k =<< parentOcc)
14971743
1498−cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed k) -> IO ()
1744+cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed x k v) -> IO ()
14991745cleanupFanSubscribed (k, subscribed) = do
15001746 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
15011747 let reducedSubscribers = DMap.delete k subscribers
@@ -1507,7 +1753,7 @@ cleanupFanSubscribed (k, subscribed) = do
15071753 else writeIORef (fanSubscribedSubscribers subscribed) $! reducedSubscribers
15081754
15091755{-# INLINE subscribeFanSubscribed #-}
1510−subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed k -> Subscriber a -> IO (SubscriberListTicket a)
1756+subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed x k v -> Subscriber x (v a) -> IO WeakBagTicket
15111757subscribeFanSubscribed k subscribed sub = do
15121758 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
15131759 case DMap.lookup k subscribers of
@@ -1515,18 +1761,19 @@ subscribeFanSubscribed k subscribed sub = do
15151761 let !self = (k, subscribed)
15161762 weakSelf <- newIORef =<< mkWeakPtrWithDebug self "FanSubscribed"
15171763 (list, sln) <- WeakBag.singleton sub weakSelf cleanupFanSubscribed
1518− 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
1764+ writeIORef (fanSubscribedSubscribers subscribed) $! DMap.insertWith (error "subscribeFanSubscribed: key that we just failed to find is present - should be impossible") k (FanSubscribedChildren list self weakSelf) subscribers
15191765 return sln
15201766 Just (FanSubscribedChildren list _ weakSelf) -> {-# SCC "hitSubscribeFanSubscribed" #-} WeakBag.insert sub list weakSelf cleanupFanSubscribed
15211767
1522−{-# SPECIALIZE getSwitchSubscribed :: Switch a -> Subscriber a -> EventM x (SubscriberListTicket a, SwitchSubscribed a) #-}
1523−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)
1768+{-# INLINABLE getSwitchSubscribed #-}
1769+getSwitchSubscribed :: HasSpiderTimeline x => Switch x a -> Subscriber x a -> EventM x (WeakBagTicket, SwitchSubscribed x a, Maybe a)
15241770getSwitchSubscribed s sub = do
15251771 mSubscribed <- liftIO $ readIORef $ switchSubscribed s
15261772 case mSubscribed of
1527− Just subscribed -> {-# SCC "hitSwitch" #-} do
1528− sln <- liftIO $ subscribeSwitchSubscribed subscribed sub
1529− return (sln, subscribed)
1773+ Just subscribed -> {-# SCC "hitSwitch" #-} liftIO $ do
1774+ sln <- subscribeSwitchSubscribed subscribed sub
1775+ occ <- readIORef $ switchSubscribedOccurrence subscribed
1776+ return (sln, subscribed, occ)
15301777 Nothing -> {-# SCC "missSwitch" #-} do
15311778 subscribedRef <- liftIO $ newIORef $ error "getSwitchSubscribed: subscribed has not yet been created"
15321779 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
@@ -1537,14 +1784,16 @@ getSwitchSubscribed s sub = do
15371784 parentsRef <- liftIO $ newIORef [] --TODO: This should be unnecessary, because it will always be filled with just the single parent behavior
15381785 holdInits <- getDeferralQueue
15391786 e <- liftIO $ runBehaviorM (readBehaviorTracked (switchParent s)) (Just (wi, parentsRef)) holdInits
1540− subscription@(EventSubscription _ subd) <- subscribe e mySub
1787+ (subscription@(EventSubscription _ subd), parentOcc) <- subscribeAndRead e mySub
1788+ heightRef <- liftIO $ newIORef =<< getEventSubscribedHeight subd
15411789 subscriptionRef <- liftIO $ newIORef subscription
1542− parentOcc <- liftIO $ readEventSubscribed subd
15431790 occRef <- liftIO $ newIORef parentOcc
15441791 when (isJust parentOcc) $ scheduleClear occRef
1545− heightRef <- liftIO $ newIORef =<< readIORef (eventSubscribedHeightRef subd)
15461792 weakSelf <- liftIO $ newIORef $ error "getSwitchSubscribed: weakSelf not yet initialized"
15471793 (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupSwitchSubscribed
1794+#ifdef DEBUG_NODEIDS
1795+ nid <- liftIO newNodeId
1796+#endif
15481797 let !subscribed = SwitchSubscribed
15491798 { switchSubscribedCachedSubscribed = switchSubscribed s
15501799 , switchSubscribedOccurrence = occRef
@@ -1557,39 +1806,39 @@ getSwitchSubscribed s sub = do
15571806 , switchSubscribedCurrentParent = subscriptionRef
15581807 , switchSubscribedWeakSelf = weakSelf
15591808#ifdef DEBUG_NODEIDS
1560− , switchSubscribedNodeId = unsafeNodeId s
1809+ , switchSubscribedNodeId = nid
15611810#endif
15621811 }
15631812 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "switchSubscribedWeakSelf"
15641813 liftIO $ writeIORef subscribedRef $! subscribed
15651814 liftIO $ writeIORef (switchSubscribed s) $ Just subscribed
1566− return (slnForSub, subscribed)
1815+ return (slnForSub, subscribed, parentOcc)
15671816
1568−cleanupSwitchSubscribed :: SwitchSubscribed a -> IO ()
1817+cleanupSwitchSubscribed :: SwitchSubscribed x a -> IO ()
15691818cleanupSwitchSubscribed subscribed = do
15701819 unsubscribe =<< readIORef (switchSubscribedCurrentParent subscribed)
15711820 finalize =<< readIORef (switchSubscribedOwnWeakInvalidator subscribed) -- We don't need to get invalidated if we're dead
15721821 writeIORef (switchSubscribedCachedSubscribed subscribed) Nothing
15731822
15741823{-# INLINE subscribeSwitchSubscribed #-}
1575−subscribeSwitchSubscribed :: SwitchSubscribed a -> Subscriber a -> IO (SubscriberListTicket a)
1824+subscribeSwitchSubscribed :: SwitchSubscribed x a -> Subscriber x a -> IO WeakBagTicket
15761825subscribeSwitchSubscribed subscribed sub = WeakBag.insert sub (switchSubscribedSubscribers subscribed) (switchSubscribedWeakSelf subscribed) cleanupSwitchSubscribed
15771826
1578−{-# SPECIALIZE getCoincidenceSubscribed :: Coincidence a -> Subscriber a -> EventM x (SubscriberListTicket a, CoincidenceSubscribed a) #-}
1579−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)
1827+{-# INLINABLE getCoincidenceSubscribed #-}
1828+getCoincidenceSubscribed :: forall x a. HasSpiderTimeline x => Coincidence x a -> Subscriber x a -> EventM x (WeakBagTicket, CoincidenceSubscribed x a, Maybe a)
15801829getCoincidenceSubscribed c sub = do
15811830 mSubscribed <- liftIO $ readIORef $ coincidenceSubscribed c
15821831 case mSubscribed of
1583− Just subscribed -> {-# SCC "hitCoincidence" #-} do
1584− sln <- liftIO $ subscribeCoincidenceSubscribed subscribed sub
1585− return (sln, subscribed)
1832+ Just subscribed -> {-# SCC "hitCoincidence" #-} liftIO $ do
1833+ sln <- subscribeCoincidenceSubscribed subscribed sub
1834+ occ <- readIORef $ coincidenceSubscribedOccurrence subscribed
1835+ return (sln, subscribed, occ)
15861836 Nothing -> {-# SCC "missCoincidence" #-} do
15871837 subscribedRef <- liftIO $ newIORef $ error "getCoincidenceSubscribed: subscribed has not yet been created"
15881838 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
15891839 subOuter <- liftIO $ newSubscriberCoincidenceOuter subscribedUnsafe
1590− outerSubscription@(EventSubscription _ outerSubd) <- subscribe (coincidenceParent c) subOuter
1591− outerOcc <- liftIO $ readEventSubscribed outerSubd
1592− outerHeight <- liftIO $ readIORef $ eventSubscribedHeightRef outerSubd
1840+ (outerSubscription@(EventSubscription _ outerSubd), outerOcc) <- subscribeAndRead (coincidenceParent c) subOuter
1841+ outerHeight <- liftIO $ getEventSubscribedHeight outerSubd
15931842 (occ, height, mInnerSubd) <- case outerOcc of
15941843 Nothing -> return (Nothing, outerHeight, Nothing)
15951844 Just o -> do
@@ -1602,6 +1851,9 @@ getCoincidenceSubscribed c sub = do
16021851 scheduleClear innerSubdRef
16031852 weakSelf <- liftIO $ newIORef $ error "getCoincidenceSubscribed: weakSelf not yet implemented"
16041853 (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupCoincidenceSubscribed
1854+#ifdef DEBUG_NODEIDS
1855+ nid <- liftIO newNodeId
1856+#endif
16051857 let subscribed = CoincidenceSubscribed
16061858 { coincidenceSubscribedCachedSubscribed = coincidenceSubscribed c
16071859 , coincidenceSubscribedOccurrence = occRef
@@ -1612,160 +1864,549 @@ getCoincidenceSubscribed c sub = do
16121864 , coincidenceSubscribedInnerParent = innerSubdRef
16131865 , coincidenceSubscribedWeakSelf = weakSelf
16141866#ifdef DEBUG_NODEIDS
1615− , coincidenceSubscribedNodeId = unsafeNodeId c
1867+ , coincidenceSubscribedNodeId = nid
16161868#endif
16171869 }
16181870 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "CoincidenceSubscribed"
16191871 liftIO $ writeIORef subscribedRef $! subscribed
16201872 liftIO $ writeIORef (coincidenceSubscribed c) $ Just subscribed
1621− return (slnForSub, subscribed)
1873+ return (slnForSub, subscribed, occ)
16221874
1623−cleanupCoincidenceSubscribed :: CoincidenceSubscribed a -> IO ()
1875+cleanupCoincidenceSubscribed :: CoincidenceSubscribed x a -> IO ()
16241876cleanupCoincidenceSubscribed subscribed = do
16251877 unsubscribe $ coincidenceSubscribedOuterParent subscribed
16261878 writeIORef (coincidenceSubscribedCachedSubscribed subscribed) Nothing
16271879
16281880{-# INLINE subscribeCoincidenceSubscribed #-}
1629−subscribeCoincidenceSubscribed :: CoincidenceSubscribed a -> Subscriber a -> IO (SubscriberListTicket a)
1881+subscribeCoincidenceSubscribed :: CoincidenceSubscribed x a -> Subscriber x a -> IO WeakBagTicket
16301882subscribeCoincidenceSubscribed subscribed sub = WeakBag.insert sub (coincidenceSubscribedSubscribers subscribed) (coincidenceSubscribedWeakSelf subscribed) cleanupCoincidenceSubscribed
16311883
1632−{-# INLINE merge #-}
1633−merge :: GCompare k => Dynamic R.PatchDMap (DMap k Event) -> Event (DMap k Identity)
1634−merge m = EventMerge $ Merge
1635− { mergeParents = m
1636− , mergeSubscribed = unsafeNewIORef m Nothing
1884+{-# INLINE mergeG #-}
1885+mergeG :: forall k q x v. (HasSpiderTimeline x, GCompare k)
1886+ => (forall a. q a -> Event x (v a))
1887+ -> DynamicS x (PatchDMap k q) -> Event x (DMap k v)
1888+mergeG nt d = cacheEvent (mergeCheap nt d)
1889+
1890+{-# INLINE mergeWithMove #-}
1891+mergeWithMove :: forall k v q x. (HasSpiderTimeline x, GCompare k)
1892+ => (forall a. q a -> Event x (v a))
1893+ -> DynamicS x (PatchDMapWithMove k q) -> Event x (DMap k v)
1894+mergeWithMove nt d = cacheEvent (mergeCheapWithMove nt d)
1895+
1896+{-# INLINE [1] mergeCheap #-}
1897+mergeCheap
1898+ :: forall k x q v. (HasSpiderTimeline x, GCompare k)
1899+ => (forall a. q a -> Event x (v a))
1900+ -> DynamicS x (PatchDMap k q)
1901+ -> Event x (DMap k v)
1902+mergeCheap nt = mergeGCheap' unMergeSubscribedParent getInitialSubscribers updateMe destroy
1903+ where
1904+ updateMe :: MergeUpdateFunc k v x (PatchDMap k q) (MergeSubscribedParent x)
1905+ updateMe subscriber heightBagRef oldParents (PatchDMap p) = do
1906+ let f (subscriptionsToKill, ps) (k :=> ComposeMaybe me) = do
1907+ (mOldSubd, newPs) <- case me of
1908+ Nothing -> return $ DMap.updateLookupWithKey (\_ _ -> Nothing) k ps
1909+ Just e -> do
1910+ let s = subscriber $ return k
1911+ subscription@(EventSubscription _ subd) <- subscribe (nt e) s
1912+ newParentHeight <- liftIO $ getEventSubscribedHeight subd
1913+ let newParent = MergeSubscribedParent subscription
1914+ liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1915+ return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
1916+ forM_ mOldSubd $ \oldSubd -> do
1917+ oldHeight <- liftIO $ getEventSubscribedHeight $
1918+ _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1919+
1920+ liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1921+ return (maybeToList (unMergeSubscribedParent <$> mOldSubd) ++ subscriptionsToKill, newPs)
1922+ foldM f ([], oldParents) $ DMap.toList p
1923+
1924+ getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParent x)
1925+ getInitialSubscribers initialParents subscriber = do
1926+ subscribers <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1927+ let s = subscriber $ return k
1928+ (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead (nt e) s
1929+ height <- liftIO $ getEventSubscribedHeight parentSubd
1930+ return (fmap (k :=>) parentOcc, height, k :=> MergeSubscribedParent subscription)
1931+ return ( DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1932+ , fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1933+ , DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1934+ )
1935+
1936+ destroy :: MergeDestroyFunc k (MergeSubscribedParent x)
1937+ destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParent sub) -> unsubscribe sub
1938+
1939+{-# INLINE [1] mergeCheapWithMove #-}
1940+mergeCheapWithMove :: forall k x v q. (HasSpiderTimeline x, GCompare k)
1941+ => (forall a. q a -> Event x (v a))
1942+ -> DynamicS x (PatchDMapWithMove k q)
1943+ -> Event x (DMap k v)
1944+mergeCheapWithMove nt = mergeGCheap' _mergeSubscribedParentWithMove_subscription getInitialSubscribers updateMe destroy
1945+ where
1946+ updateMe :: MergeUpdateFunc k v x (PatchDMapWithMove k q) (MergeSubscribedParentWithMove x k)
1947+ updateMe subscriber heightBagRef oldParents p = do
1948+ -- Prepare new parents for insertion
1949+ let subscribeParent :: forall a. k a -> Event x (v a) -> EventM x (MergeSubscribedParentWithMove x k a)
1950+ subscribeParent k e = do
1951+ keyRef <- liftIO $ newIORef k
1952+ let s = subscriber $ liftIO $ readIORef keyRef
1953+ subscription@(EventSubscription _ subd) <- subscribe e s
1954+ liftIO $ do
1955+ newParentHeight <- getEventSubscribedHeight subd
1956+ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1957+ return $ MergeSubscribedParentWithMove subscription keyRef
1958+ p' <- PatchDMapWithMove.traversePatchDMapWithMoveWithKey (\k q -> subscribeParent k (nt q)) p
1959+ -- Collect old parents for deletion and update the keys of moved parents
1960+ let moveOrDelete :: forall a. k a -> PatchDMapWithMove.NodeInfo k q a -> MergeSubscribedParentWithMove x k a -> Constant (EventM x (Maybe (EventSubscription x))) a
1961+ moveOrDelete _ ni parent = Constant $ case getComposeMaybe $ PatchDMapWithMove._nodeInfo_to ni of
1962+ Nothing -> do
1963+ oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $
1964+ _mergeSubscribedParentWithMove_subscription parent
1965+
1966+ liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1967+ return $ Just $ _mergeSubscribedParentWithMove_subscription parent
1968+ Just toKey -> do
1969+ liftIO $ writeIORef (_mergeSubscribedParentWithMove_key parent) $! toKey
1970+ return Nothing
1971+ toDelete <- fmap catMaybes $ mapM (\(_ :=> v) -> getConstant v) $ DMap.toList $
1972+ DMap.intersectionWithKey moveOrDelete (unPatchDMapWithMove p) oldParents
1973+
1974+ return (toDelete, applyAlways p' oldParents)
1975+ getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParentWithMove x k)
1976+ getInitialSubscribers initialParents subscriber = do
1977+ subscribers <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1978+ keyRef <- liftIO $ newIORef k
1979+ let s = subscriber $ liftIO $ readIORef keyRef
1980+ (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead (nt e) s
1981+ height <- liftIO $ getEventSubscribedHeight parentSubd
1982+ return (fmap (k :=>) parentOcc, height, k :=> MergeSubscribedParentWithMove subscription keyRef)
1983+ return ( DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1984+ , fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1985+ , DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1986+ )
1987+
1988+ destroy :: MergeDestroyFunc k (MergeSubscribedParentWithMove x k)
1989+ destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParentWithMove sub _) -> unsubscribe sub
1990+
1991+type MergeUpdateFunc k v x p s
1992+ = (forall a. EventM x (k a) -> Subscriber x (v a))
1993+ -> IORef HeightBag
1994+ -> DMap k s
1995+ -> p
1996+ -> EventM x ([EventSubscription x], DMap k s)
1997+
1998+type MergeGetSubscription x s = forall a. s a -> EventSubscription x
1999+
2000+type MergeInitFunc k v q x s
2001+ = DMap k q
2002+ -> (forall a. EventM x (k a) -> Subscriber x (v a))
2003+ -> EventM x (DMap k v, [Height], DMap k s)
2004+
2005+type MergeDestroyFunc k s
2006+ = DMap k s
2007+ -> IO ()
2008+
2009+data Merge x k v s = Merge
2010+ { _merge_parentsRef :: {-# UNPACK #-} !(IORef (DMap k s))
2011+ , _merge_heightBagRef :: {-# UNPACK #-} !(IORef HeightBag)
2012+ , _merge_heightRef :: {-# UNPACK #-} !(IORef Height)
2013+ , _merge_sub :: {-# UNPACK #-} !(Subscriber x (DMap k v))
2014+ , _merge_accumRef :: {-# UNPACK #-} !(IORef (DMap k v))
2015+ }
2016+
2017+invalidateMergeHeight :: Merge x k v s -> IO ()
2018+invalidateMergeHeight m = invalidateMergeHeight' (_merge_heightRef m) (_merge_sub m)
2019+
2020+invalidateMergeHeight' :: IORef Height -> Subscriber x a -> IO ()
2021+invalidateMergeHeight' heightRef sub = do
2022+ oldHeight <- readIORef heightRef
2023+ -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
2024+ when (oldHeight /= invalidHeight) $ do
2025+ writeIORef heightRef $! invalidHeight
2026+ subscriberInvalidateHeight sub oldHeight
2027+
2028+revalidateMergeHeight :: Merge x k v s -> IO ()
2029+revalidateMergeHeight m = do
2030+ currentHeight <- readIORef $ _merge_heightRef m
2031+
2032+ -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
2033+ when (currentHeight == invalidHeight) $ do
2034+ heights <- readIORef $ _merge_heightBagRef m
2035+ parents <- readIORef $ _merge_parentsRef m
2036+ -- When the number of heights in the bag reaches the number of parents, we should have a valid height
2037+ case heightBagSize heights `compare` DMap.size parents of
2038+ LT -> return ()
2039+ EQ -> do
2040+ let height = succHeight $ heightBagMax heights
2041+ traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
2042+ writeIORef (_merge_heightRef m) $! height
2043+ subscriberRecalculateHeight (_merge_sub m) height
2044+ GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show (DMap.size parents) <> ") for Merge"
2045+
2046+scheduleMergeSelf :: HasSpiderTimeline x => Merge x k v s -> Height -> EventM x ()
2047+scheduleMergeSelf m height = scheduleMerge' height (_merge_heightRef m) $ do
2048+ vals <- liftIO $ readIORef $ _merge_accumRef m
2049+ -- Once we're done with this, we can clear it immediately, because if there's a cacheEvent in front of us,
2050+ -- it'll handle subsequent subscribers, and if not, we won't get subsequent subscribers
2051+ liftIO $ writeIORef (_merge_accumRef m) $! DMap.empty
2052+ --TODO: Assert that m is not empty
2053+ subscriberPropagate (_merge_sub m) vals
2054+
2055+checkCycle :: HasSpiderTimeline x => EventSubscribed x -> EventM x ()
2056+checkCycle subscribed = liftIO $ do
2057+ height <- readIORef (eventSubscribedHeightRef subscribed)
2058+
2059+ -- currentHeight <- getCurrentHeight
2060+ -- when (height <= currentHeight) $ if height /= invalidHeight
2061+ -- then do
2062+ -- myStack <- liftIO $ whoCreatedIORef undefined --TODO
2063+ -- error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
2064+ -- else liftIO $
2065+ when (height == invalidHeight) $
2066+#ifdef DEBUG_CYCLES
2067+ do
2068+ nodesInvolvedInCycle <- walkInvalidHeightParents subscribed
2069+ stacks <- forM nodesInvolvedInCycle whoCreatedEventSubscribed
2070+ throwIO (EventLoopException stacks)
2071+#else
2072+ throwIO EventLoopException
2073+#endif
2074+
2075+
2076+mergeSubscriber :: forall x k v s a. (HasSpiderTimeline x, GCompare k) => EventSubscribed x -> Merge x k v s -> EventM x (k a) -> Subscriber x (v a)
2077+mergeSubscriber subscribed m getKey = Subscriber
2078+ { subscriberPropagate = \a -> do
2079+ oldM <- liftIO $ readIORef $ _merge_accumRef m
2080+ k <- getKey
2081+ let newM = DMap.insertWith (error "Same key fired multiple times for Merge") k a oldM
2082+ tracePropagate (Proxy :: Proxy x) $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
2083+ liftIO $ writeIORef (_merge_accumRef m) $! newM
2084+ when (DMap.null oldM) $ do -- Only schedule the firing once
2085+ height <- liftIO $ readIORef $ _merge_heightRef m
2086+ checkCycle subscribed
2087+
2088+ scheduleMergeSelf m height
2089+ , subscriberInvalidateHeight = \old -> do --TODO: When removing a parent doesn't actually change the height, maybe we can avoid invalidating
2090+ modifyIORef' (_merge_heightBagRef m) $ heightBagRemove old
2091+ invalidateMergeHeight m
2092+ , subscriberRecalculateHeight = \new -> do
2093+ modifyIORef' (_merge_heightBagRef m) $ heightBagAdd new
2094+ revalidateMergeHeight m
16372095 }
16382096
1639−newtype EventSelector k = EventSelector { select :: forall a. k a -> Event a }
2097+--TODO: Be able to run as much of this as possible promptly
2098+updateMerge :: (HasSpiderTimeline x, GCompare k) => EventSubscribed x -> Merge x k v s -> MergeUpdateFunc k v x p s -> p -> SomeMergeUpdate x
2099+updateMerge subscribed m updateFunc p = SomeMergeUpdate updateMe (invalidateMergeHeight m) (revalidateMergeHeight m)
2100+ where updateMe = do
2101+ oldParents <- liftIO $ readIORef $ _merge_parentsRef m
2102+ (subscriptionsToKill, newParents) <- updateFunc (mergeSubscriber subscribed m) (_merge_heightBagRef m) oldParents p
2103+ liftIO $ writeIORef (_merge_parentsRef m) $! newParents
2104+ return subscriptionsToKill
2105+
2106+{-# INLINE mergeGCheap' #-}
2107+mergeGCheap' :: forall k v x p s q. (HasSpiderTimeline x, GCompare k, PatchTarget p ~ DMap k q)
2108+ => MergeGetSubscription x s -> MergeInitFunc k v q x s -> MergeUpdateFunc k v x p s -> MergeDestroyFunc k s -> DynamicS x p -> Event x (DMap k v)
2109+mergeGCheap' getParent getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
2110+ initialParents <- readBehaviorUntracked $ dynamicCurrent d
2111+ accumRef <- liftIO $ newIORef $ error "merge: accumRef not yet initialized"
2112+ heightRef <- liftIO $ newIORef $ error "merge: heightRef not yet initialized"
2113+ heightBagRef <- liftIO $ newIORef $ error "merge: heightBagRef not yet initialized"
2114+ parentsRef :: IORef (DMap k s) <- liftIO $ newIORef $ error "merge: parentsRef not yet initialized"
2115+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2116+
2117+ let subscribed = EventSubscribed
2118+ { eventSubscribedHeightRef = heightRef
2119+ , eventSubscribedRetained = toAny (parentsRef, changeSubdRef)
2120+#ifdef DEBUG_CYCLES
2121+ , eventSubscribedGetParents = do
2122+ let getParent' (_ :=> v) = _eventSubscription_subscribed (getParent v)
2123+ fmap getParent' . DMap.toList <$> readIORef parentsRef
2124+ , eventSubscribedHasOwnHeightRef = False
2125+ , eventSubscribedWhoCreated = whoCreatedIORef heightRef
2126+#endif
2127+ }
2128+
2129+ m = Merge
2130+ { _merge_parentsRef = parentsRef
2131+ , _merge_heightBagRef = heightBagRef
2132+ , _merge_heightRef = heightRef
2133+ , _merge_sub = sub
2134+ , _merge_accumRef = accumRef
2135+ }
2136+ (dm, heights, initialParentState) <- getInitialSubscribers initialParents $ mergeSubscriber subscribed m
2137+ let myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
2138+ myHeight = if invalidHeight `elem` heights
2139+ then invalidHeight
2140+ else succHeight $ heightBagMax myHeightBag
2141+ currentHeight <- getCurrentHeight
2142+ let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
2143+ then (if DMap.null dm then Nothing else Just dm, DMap.empty)
2144+ else (Nothing, dm)
2145+ unless (DMap.null accum) $ scheduleMergeSelf m myHeight
2146+ liftIO $ writeIORef accumRef $! accum
2147+ liftIO $ writeIORef heightRef $! myHeight
2148+ liftIO $ writeIORef heightBagRef $! myHeightBag
2149+ liftIO $ writeIORef parentsRef $! initialParentState
2150+ defer $ SomeMergeInit $ do
2151+ let changeSubscriber = Subscriber
2152+ { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
2153+ tracePropagate (Proxy :: Proxy x) "SubscriberMerge/Change"
2154+ defer $ updateMerge subscribed m updateFunc a
2155+ , subscriberInvalidateHeight = \_ -> return ()
2156+ , subscriberRecalculateHeight = \_ -> return ()
2157+ }
2158+ (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
2159+ forM_ change $ \c -> defer $ updateMerge subscribed m updateFunc c
2160+ -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
2161+ -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
2162+ -- its subscription.
2163+ liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
2164+ let unsubscribeAll = destroy =<< readIORef parentsRef
2165+
2166+ return (EventSubscription unsubscribeAll subscribed, occ)
2167+
2168+
2169+mergeInt :: forall x a. (HasSpiderTimeline x) => DynamicS x (PatchIntMap (Event x a)) -> Event x (IntMap a)
2170+mergeInt = cacheEvent . mergeIntCheap
2171+
2172+{-# INLINABLE mergeIntCheap #-}
2173+mergeIntCheap :: forall x a. (HasSpiderTimeline x) => DynamicS x (PatchIntMap (Event x a)) -> Event x (IntMap a)
2174+mergeIntCheap d = Event $ \sub -> do
2175+ initialParents <- readBehaviorUntracked $ dynamicCurrent d
2176+ accum <- liftIO $ FastMutableIntMap.newEmpty
2177+ heightRef <- liftIO $ newIORef zeroHeight
2178+ heightBagRef <- liftIO $ newIORef heightBagEmpty
2179+ parents <- liftIO $ FastMutableIntMap.newEmpty
2180+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2181+ let subscribed = EventSubscribed
2182+ { eventSubscribedHeightRef = heightRef
2183+ , eventSubscribedRetained = toAny (parents, changeSubdRef)
2184+#ifdef DEBUG_CYCLES
2185+ , eventSubscribedGetParents = fmap (_eventSubscription_subscribed . snd) <$> FastMutableIntMap.toList parents
2186+ , eventSubscribedHasOwnHeightRef = False
2187+ , eventSubscribedWhoCreated = whoCreatedIORef heightRef
2188+#endif
2189+ }
2190+ let scheduleSelf = do
2191+ height <- liftIO $ readIORef $ heightRef
2192+ scheduleMerge' height heightRef $ do
2193+ vals <- liftIO $ FastMutableIntMap.getFrozenAndClear accum
2194+ subscriberPropagate sub vals
2195+ invalidateMyHeight = invalidateMergeHeight' heightRef sub
2196+ recalculateMyHeight = do
2197+ currentHeight <- readIORef heightRef
2198+ when (currentHeight == invalidHeight) $ do --TODO: This will almost always be true; can we get rid of this check and just proceed to the next one always?
2199+ heights <- readIORef heightBagRef
2200+ numParents <- FastMutableIntMap.size parents
2201+ case heightBagSize heights `compare` numParents of
2202+ LT -> return ()
2203+ EQ -> do
2204+ let height = succHeight $ heightBagMax heights
2205+ traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
2206+ writeIORef heightRef $! height
2207+ subscriberRecalculateHeight sub height
2208+ GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show numParents <> ") for Merge"
2209+ mySubscriber k = Subscriber
2210+ { subscriberPropagate = \a -> do
2211+ checkCycle subscribed
2212+
2213+ wasEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
2214+ liftIO $ FastMutableIntMap.insert accum k a
2215+ when wasEmpty scheduleSelf
2216+ , subscriberInvalidateHeight = \old -> do
2217+ modifyIORef' heightBagRef $ heightBagRemove old
2218+ invalidateMyHeight
2219+ , subscriberRecalculateHeight = \new -> do
2220+ modifyIORef' heightBagRef $ heightBagAdd new
2221+ recalculateMyHeight
2222+ }
2223+ forM_ (IntMap.toList initialParents) $ \(k, p) -> do
2224+ (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead p $ mySubscriber k
2225+ liftIO $ do
2226+ forM_ parentOcc $ FastMutableIntMap.insert accum k
2227+ FastMutableIntMap.insert parents k subscription
2228+ height <- getEventSubscribedHeight parentSubd
2229+ if height == invalidHeight
2230+ then writeIORef heightRef invalidHeight
2231+ else do
2232+ modifyIORef' heightBagRef $ heightBagAdd height
2233+ modifyIORef' heightRef $ \oldHeight ->
2234+ if oldHeight == invalidHeight
2235+ then invalidHeight
2236+ else max (succHeight height) oldHeight
2237+ myHeight <- liftIO $ readIORef heightRef
2238+ currentHeight <- getCurrentHeight
2239+ isEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
2240+ occ <- if currentHeight >= myHeight -- If we should have fired by now
2241+ then if isEmpty
2242+ then return Nothing
2243+ else liftIO $ Just <$> FastMutableIntMap.getFrozenAndClear accum
2244+ else do when (not isEmpty) scheduleSelf -- We have things accumulated, but we shouldn't have fired them yet
2245+ return Nothing
2246+ defer $ SomeMergeInit $ do
2247+ let updateMe a = SomeMergeUpdate u invalidateMyHeight recalculateMyHeight
2248+ where
2249+ u = do
2250+ let f k newParent = do
2251+ subscription@(EventSubscription _ subd) <- subscribe newParent $ mySubscriber k
2252+ newParentHeight <- liftIO $ getEventSubscribedHeight subd
2253+ liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
2254+ return subscription
2255+ newSubscriptions <- FastMutableIntMap.traverseIntMapPatchWithKey f a
2256+ oldParents <- liftIO $ FastMutableIntMap.applyPatch parents newSubscriptions
2257+ liftIO $ for_ oldParents $ \oldParent -> do
2258+ oldParentHeight <- getEventSubscribedHeight $ _eventSubscription_subscribed oldParent
2259+
2260+ print ("updateMe", oldParentHeight)
2261+ modifyIORef' heightBagRef $ heightBagRemove oldParentHeight
2262+ return $ IntMap.elems oldParents
2263+ let changeSubscriber = Subscriber
2264+ { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
2265+ tracePropagate (Proxy :: Proxy x) $ "SubscriberMergeInt/Change"
2266+ defer $ updateMe a
2267+ , subscriberInvalidateHeight = \_ -> return ()
2268+ , subscriberRecalculateHeight = \_ -> return ()
2269+ }
2270+ (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
2271+ forM_ change $ \c -> defer $ updateMe c
2272+ -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
2273+ -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
2274+ -- its subscription.
2275+ liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
2276+ let unsubscribeAll = traverse_ unsubscribe =<< FastMutableIntMap.getFrozenAndClear parents
2277+
2278+
2279+ return (EventSubscription unsubscribeAll subscribed, occ)
16402280
1641−fan :: GCompare k => Event (DMap k Identity) -> EventSelector k
1642−fan e =
2281+newtype EventSelector x k = EventSelector { select :: forall a. k a -> Event x a }
2282+newtype EventSelectorG x k v = EventSelectorG { selectG :: forall a. k a -> Event x (v a) }
2283+
2284+fanG :: (HasSpiderTimeline x, GCompare k) => Event x (DMap k v) -> EventSelectorG x k v
2285+fanG e = unsafePerformIO $ do
2286+ ref <- newIORef Nothing
16432287 let f = Fan
16442288 { fanParent = e
1645− , fanSubscribed = unsafeNewIORef e Nothing
2289+ , fanSubscribed = ref
16462290 }
1647− in EventSelector $ \k -> EventFan k f
2291+ pure $ EventSelectorG $ \k -> eventFan k f
16482292
1649−runHoldInits :: IORef [SomeHoldInit] -> IORef [SomeMergeInit] -> EventM x ()
1650−runHoldInits holdInitRef mergeInitRef = do
2293+runHoldInits :: HasSpiderTimeline x => IORef [SomeHoldInit x] -> IORef [SomeDynInit x] -> IORef [SomeMergeInit x] -> EventM x ()
2294+runHoldInits holdInitRef dynInitRef mergeInitRef = do
16512295 holdInits <- liftIO $ readIORef holdInitRef
2296+ dynInits <- liftIO $ readIORef dynInitRef
16522297 mergeInits <- liftIO $ readIORef mergeInitRef
1653− unless (null holdInits && null mergeInits) $ do
2298+ unless (null holdInits && null dynInits && null mergeInits) $ do
16542299 liftIO $ writeIORef holdInitRef []
2300+ liftIO $ writeIORef dynInitRef []
16552301 liftIO $ writeIORef mergeInitRef []
16562302 mapM_ initHold holdInits
1657− mapM_ initMerge mergeInits
1658− runHoldInits holdInitRef mergeInitRef
2303+ mapM_ initDyn dynInits
2304+ mapM_ unSomeMergeInit mergeInits
2305+ runHoldInits holdInitRef dynInitRef mergeInitRef
16592306
1660−initHold :: SomeHoldInit -> EventM x ()
2307+initHold :: HasSpiderTimeline x => SomeHoldInit x -> EventM x ()
16612308initHold (SomeHoldInit h) = void $ getHoldEventSubscription h
16622309
1663−initMerge :: SomeMergeInit -> EventM x ()
1664−initMerge (SomeMergeInit subscribed changed) = do
1665− changeSub <- liftIO $ newSubscriberMergeChange subscribed
1666− EventSubscription _ changeSubd <- subscribe changed changeSub
1667− change <- liftIO $ readEventSubscribed changeSubd
1668− forM_ change $ \c -> defer $ SomeMergeUpdate c subscribed
1669− liftIO $ writeIORef (mergeSubscribedChange subscribed) (changeSub, changeSubd)
2310+initDyn :: HasSpiderTimeline x => SomeDynInit x -> EventM x ()
2311+initDyn (SomeDynInit d) = void $ getDynHold d
16702312
1671−-- | Run an event action outside of a frame
1672−runFrame :: EventM x a -> SpiderHost x a --TODO: This function also needs to hold the mutex
1673−runFrame a = SpiderHost $ ask >>= \spiderEnv -> lift $ do
1674− -- 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
1675− pendingCleanups <- atomicModifyIORef (_spiderEnv_cleanups spiderEnv) $ \x -> ([], x)
1676− {-# SCC "cleanups" #-} sequence_ pendingCleanups
2313+newEventEnv :: IO (EventEnv x)
2314+newEventEnv = do
16772315 toAssignRef <- newIORef [] -- This should only actually get used when events are firing
16782316 holdInitRef <- newIORef []
2317+ dynInitRef <- newIORef []
16792318 mergeUpdateRef <- newIORef []
16802319 mergeInitRef <- newIORef []
16812320 heightRef <- newIORef zeroHeight
16822321 toClearRef <- newIORef []
2322+ toClearIntRef <- newIORef []
16832323 toClearRootRef <- newIORef []
16842324 coincidenceInfosRef <- newIORef []
1685− delayedRef <- liftIO $ newIORef IntMap.empty
1686− let env = EventEnv spiderEnv toAssignRef holdInitRef mergeUpdateRef mergeInitRef toClearRef toClearRootRef heightRef coincidenceInfosRef delayedRef
2325+ delayedRef <- newIORef IntMap.empty
2326+ return $ EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef
2327+
2328+clearEventEnv :: EventEnv x -> IO ()
2329+clearEventEnv (EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef) = do
2330+ writeIORef toAssignRef []
2331+ writeIORef holdInitRef []
2332+ writeIORef dynInitRef []
2333+ writeIORef mergeUpdateRef []
2334+ writeIORef mergeInitRef []
2335+ writeIORef heightRef zeroHeight
2336+ writeIORef toClearRef []
2337+ writeIORef toClearIntRef []
2338+ writeIORef toClearRootRef []
2339+ writeIORef coincidenceInfosRef []
2340+ writeIORef delayedRef IntMap.empty
2341+
2342+-- | Run an event action outside of a frame
2343+runFrame :: forall x a. HasSpiderTimeline x => EventM x a -> SpiderHost x a --TODO: This function also needs to hold the mutex
2344+runFrame a = SpiderHost $ do
2345+ let env = _spiderTimeline_eventEnv $ unSTE (spiderTimeline :: SpiderTimelineEnv x)
16872346 let go = do
16882347 result <- a
1689− 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
2348+ runHoldInits (eventEnvHoldInits env) (eventEnvDynInits env) (eventEnvMergeInits env) -- This must happen before doing the assignments, in case subscribing a Hold causes existing Holds to be read by the newly-propagated events
16902349 return result
1691− result <- runEventM go env
1692− toClear <- readIORef toClearRef
1693− forM_ toClear $ \(SomeClear ref) -> {-# SCC "clear" #-} writeIORef ref Nothing
1694− toClearRoot <- readIORef toClearRootRef
1695− forM_ toClearRoot $ \(SomeRootClear ref) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
1696− toAssign <- readIORef toAssignRef
2350+ result <- runEventM go
2351+ toClear <- readIORef $ eventEnvClears env
2352+ forM_ toClear $ \(Some (Clear ref)) -> {-# SCC "clear" #-} writeIORef ref Nothing
2353+ toClearInt <- readIORef $ eventEnvIntClears env
2354+ forM_ toClearInt $ \(Some (IntClear ref)) -> {-# SCC "intClear" #-} writeIORef ref $! IntMap.empty
2355+ toClearRoot <- readIORef $ eventEnvRootClears env
2356+ forM_ toClearRoot $ \(Some (RootClear ref)) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
2357+ toAssign <- readIORef $ eventEnvAssignments env
16972358 toReconnectRef <- newIORef []
1698− coincidenceInfos <- readIORef coincidenceInfosRef
2359+ coincidenceInfos <- readIORef $ eventEnvResetCoincidences env
16992360 forM_ toAssign $ \(SomeAssignment vRef iRef v) -> {-# SCC "assignment" #-} do
17002361 writeIORef vRef v
1701− when debugInvalidate $ putStrLn $ "Invalidating Hold"
2362+ traceInvalidate $ "Invalidating Hold"
17022363 writeIORef iRef =<< evaluate =<< invalidate toReconnectRef =<< readIORef iRef
1703− mergeUpdates <- readIORef mergeUpdateRef
1704− writeIORef mergeUpdateRef []
1705− let updateMerge :: SomeMergeUpdate -> IO [SomeEventSubscription]
1706− updateMerge (SomeMergeUpdate (R.PatchDMap p :: R.PatchDMap (DMap k Event)) m) = do
1707− oldParents <- readIORef $ mergeSubscribedParents m
1708− let f (subscriptionsToKill, ps) (k :=> Compose me) = do
1709− (mOldSubd, newPs) <- case me of
1710− Nothing -> return $ DMap.updateLookupWithKey (\_ _ -> Nothing) k ps
1711− Just e -> do
1712− s <- liftIO $ newSubscriberMerge k m
1713− subscription@(EventSubscription _ subd) <- subscribe e s
1714− let newParent = MergeSubscribedParent subscription s
1715− newParentHeight <- liftIO $ getEventSubscribedHeight subd
1716− liftIO $ addMergeHeight newParentHeight m
1717− return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
1718− forM_ mOldSubd $ \oldSubd -> do
1719− oldHeight <- liftIO $ readIORef $ eventSubscribedHeightRef $ _eventSubscription_subscribed $ mergeSubscribedParentSubscription oldSubd
1720− liftIO $ removeMergeHeight oldHeight m
1721− return (maybeToList (SomeEventSubscription . mergeSubscribedParentSubscription <$> mOldSubd) ++ subscriptionsToKill, newPs)
1722− (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
1723− writeIORef (mergeSubscribedParents m) $! newParents
1724− return subscriptionsToKill
1725− when debugPropagate $ putStrLn "Updating merges"
1726− mergeSubscriptionsToKill <- concat <$> mapM updateMerge mergeUpdates
1727− when debugPropagate $ putStrLn "Updating merges done"
2364+ mergeUpdates <- readIORef $ eventEnvMergeUpdates env
2365+ writeIORef (eventEnvMergeUpdates env) []
2366+ tracePropagate (Proxy::Proxy x) $ "Updating merges"
2367+ mergeSubscriptionsToKill <- runEventM $ concat <$> mapM _someMergeUpdate_update mergeUpdates
2368+ tracePropagate (Proxy::Proxy x) $ "Updating merges done"
17282369 toReconnect <- readIORef toReconnectRef
2370+ clearEventEnv env
17292371 switchSubscriptionsToKill <- forM toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
17302372 oldSubscription <- readIORef $ switchSubscribedCurrentParent subscribed
17312373 wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
1732− when debugInvalidate $ putStrLn $ "Finalizing invalidator for Switch" <> showNodeId subscribed
2374+ traceInvalidate $ "Finalizing invalidator for Switch" <> showNodeId subscribed
17332375 finalize wi
17342376 i <- evaluate $ switchSubscribedOwnInvalidator subscribed
17352377 wi' <- mkWeakPtrWithDebug i "wi'"
17362378 writeIORef (switchSubscribedOwnWeakInvalidator subscribed) $! wi'
17372379 writeIORef (switchSubscribedBehaviorParents subscribed) []
1738− writeIORef holdInitRef [] --TODO: Should we reuse this?
1739− e <- runBehaviorM (readBehaviorTracked (switchSubscribedParent subscribed)) (Just (wi', switchSubscribedBehaviorParents subscribed)) holdInitRef
1740− 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
2380+ writeIORef (eventEnvHoldInits env) [] --TODO: Should we reuse this?
2381+ e <- runBehaviorM (readBehaviorTracked (switchSubscribedParent subscribed)) (Just (wi', switchSubscribedBehaviorParents subscribed)) $ eventEnvHoldInits env
2382+ runEventM $ runHoldInits (eventEnvHoldInits env) (eventEnvDynInits env) (eventEnvMergeInits 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
17412383 --TODO: Make sure we touch the pieces of the SwitchSubscribed at the appropriate times
17422384 sub <- newSubscriberSwitch subscribed
1743− 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
2385+ subscription <- unSpiderHost $ runFrame $ {-# SCC "subscribeSwitch" #-} subscribe e sub --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
17442386 {-
17452387 stackTrace <- liftIO $ fmap renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
1746− liftIO $ putStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
2388+ liftIO $ debugStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
17472389 EventRoot _ -> "EventRoot"
17482390 EventNever -> "EventNever"
17492391 _ -> "something else"
17502392 -}
17512393 writeIORef (switchSubscribedCurrentParent subscribed) $! subscription
1752− return $ SomeEventSubscription oldSubscription
1753− forM_ mergeSubscriptionsToKill $ \(SomeEventSubscription oldSubscription) -> liftIO $ unsubscribe oldSubscription
1754− forM_ switchSubscriptionsToKill $ \(SomeEventSubscription oldSubscription) -> liftIO $ unsubscribe oldSubscription
2394+ return oldSubscription
2395+ liftIO $ mapM_ unsubscribe mergeSubscriptionsToKill
2396+ liftIO $ mapM_ unsubscribe switchSubscriptionsToKill
17552397 forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
17562398 EventSubscription _ subd' <- readIORef $ switchSubscribedCurrentParent subscribed
1757− parentHeight <- readIORef $ eventSubscribedHeightRef subd'
2399+ parentHeight <- getEventSubscribedHeight subd'
17582400 myHeight <- readIORef $ switchSubscribedHeight subscribed
17592401 when (parentHeight /= myHeight) $ do
17602402 writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
1761− WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
1762− forM_ mergeUpdates $ \(SomeMergeUpdate _ m) -> do
1763− 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
2403+ WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
2404+ mapM_ _someMergeUpdate_invalidateHeight mergeUpdates --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
17642405 forM_ coincidenceInfos $ \(SomeResetCoincidence subscription mcs) -> do
17652406 unsubscribe subscription
17662407 mapM_ invalidateCoincidenceHeight mcs
17672408 forM_ coincidenceInfos $ \(SomeResetCoincidence _ mcs) -> mapM_ recalculateCoincidenceHeight mcs
1768− forM_ mergeUpdates $ \(SomeMergeUpdate _ m) -> revalidateMergeHeight m
2409+ mapM_ _someMergeUpdate_recalculateHeight mergeUpdates
17692410 forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> do
17702411 height <- calculateSwitchHeight subscribed
17712412 updateSwitchHeight height subscribed
@@ -1781,10 +2422,12 @@ zeroHeight = Height 0
17812422invalidHeight :: Height
17822423invalidHeight = Height (-1000)
17832424
2425+#ifdef DEBUG_CYCLES
17842426-- | An invalid height that is currently being traversed, e.g. by walkInvalidHeightParents
17852427{-# INLINE invalidHeightBeingTraversed #-}
17862428invalidHeightBeingTraversed :: Height
17872429invalidHeightBeingTraversed = Height (-1001)
2430+#endif
17882431
17892432{-# INLINE succHeight #-}
17902433succHeight :: Height -> Height
@@ -1793,152 +2436,42 @@ succHeight h@(Height a) =
17932436 then invalidHeight
17942437 else Height $ succ a
17952438
1796−invalidateSubscriberHeight :: Height -> Subscriber a -> IO ()
1797−invalidateSubscriberHeight old s = case s of
1798− SubscriberPush _ subscribed -> do
1799− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
1800− WeakBag.traverse (pushSubscribedSubscribers subscribed) $ invalidateSubscriberHeight old
1801− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
1802− SubscriberMerge _ subscribed -> do
1803− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
1804− removeMergeHeight old subscribed
1805− invalidateMergeHeight subscribed
1806− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
1807− SubscriberMergeChange _ -> return () -- Doesn't affect the height of the merge, because its changes are delayed
1808− SubscriberFan subscribed -> do
1809− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
1810− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1811− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
1812− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
1813− SubscriberHold _ -> return ()
1814− SubscriberHoldIdentity _ -> return ()
1815− SubscriberSwitch subscribed -> do
1816− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
1817− oldHeight <- readIORef $ switchSubscribedHeight subscribed
1818− when (oldHeight /= invalidHeight) $ do
1819− writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
1820− WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1821− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
1822− SubscriberCoincidenceOuter subscribed -> do
1823− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
1824− invalidateCoincidenceHeight subscribed
1825− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
1826− SubscriberCoincidenceInner subscribed -> do
1827− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
1828− invalidateCoincidenceHeight subscribed
1829− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
1830− SubscriberHandle -> return ()
1831−
1832−removeMergeHeight :: Height -> MergeSubscribed k -> IO ()
1833−removeMergeHeight oldParentHeight subscribed = do
1834− when debugInvalidateHeight $ putStrLn $ "removeMergeHeight: " <> show oldParentHeight <> " Merge" <> showNodeId subscribed
1835− oldHeights <- readIORef $ mergeSubscribedHeightBag subscribed
1836− let newHeights = heightBagRemove oldParentHeight oldHeights
1837− writeIORef (mergeSubscribedHeightBag subscribed) $! newHeights
1838−
1839−invalidateMergeHeight :: MergeSubscribed k -> IO ()
1840−invalidateMergeHeight subscribed = do
1841− oldHeight <- readIORef $ mergeSubscribedHeight subscribed
1842− -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
1843− when (oldHeight /= invalidHeight) $ do
1844− writeIORef (mergeSubscribedHeight subscribed) $! invalidHeight
1845− WeakBag.traverse (mergeSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1846−
1847−addMergeHeight :: Height -> MergeSubscribed k -> IO ()
1848−addMergeHeight newParentHeight subscribed = do
1849− when debugInvalidateHeight $ putStrLn $ "addMergeHeight: " <> show newParentHeight <> " Merge" <> showNodeId subscribed
1850− oldHeights <- readIORef $ mergeSubscribedHeightBag subscribed
1851− let newHeights = heightBagAdd newParentHeight oldHeights
1852− writeIORef (mergeSubscribedHeightBag subscribed) $! newHeights
1853−
1854−revalidateMergeHeight :: MergeSubscribed k -> IO ()
1855−revalidateMergeHeight subscribed = do
1856− currentHeight <- readIORef $ mergeSubscribedHeight subscribed
1857− when (currentHeight == invalidHeight) $ do -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
1858− heights <- readIORef $ mergeSubscribedHeightBag subscribed
1859− parents <- readIORef $ mergeSubscribedParents subscribed
1860− -- When the number of heights in the bag reaches the number of parents, we should have a valid height
1861− case heightBagSize heights `compare` DMap.size parents of
1862− LT -> return ()
1863− EQ -> do
1864− let height = succHeight $ heightBagMax heights
1865− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
1866− writeIORef (mergeSubscribedHeight subscribed) $! height
1867− WeakBag.traverse (mergeSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
1868− GT -> error $ "revalidateMergeHeight: more heights than parents for Merge" <> showNodeId subscribed
1869−
1870−invalidateCoincidenceHeight :: CoincidenceSubscribed a -> IO ()
2439+invalidateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
18712440invalidateCoincidenceHeight subscribed = do
18722441 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
18732442 when (oldHeight /= invalidHeight) $ do
18742443 writeIORef (coincidenceSubscribedHeight subscribed) $! invalidHeight
1875− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1876−
1877−recalculateSubscriberHeight :: Height -> Subscriber a -> IO ()
1878−recalculateSubscriberHeight new s = case s of
1879− SubscriberPush _ subscribed -> do
1880− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
1881− WeakBag.traverse (pushSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
1882− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
1883− SubscriberMerge _ subscribed -> do
1884− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
1885− addMergeHeight new subscribed
1886− revalidateMergeHeight subscribed
1887− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
1888− SubscriberMergeChange _ -> return ()
1889− SubscriberFan subscribed -> do
1890− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
1891− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1892− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
1893− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
1894− SubscriberHold _ -> return ()
1895− SubscriberHoldIdentity _ -> return ()
1896− SubscriberSwitch subscribed -> do
1897− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
1898− updateSwitchHeight new subscribed
1899− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
1900− SubscriberCoincidenceOuter subscribed -> do
1901− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
1902− recalculateCoincidenceHeight subscribed
1903− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
1904− SubscriberCoincidenceInner subscribed -> do
1905− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
1906− recalculateCoincidenceHeight subscribed
1907− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
1908− SubscriberHandle -> return ()
1909−
1910−updateSwitchHeight :: Height -> SwitchSubscribed a -> IO ()
2444+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
2445+
2446+updateSwitchHeight :: Height -> SwitchSubscribed x a -> IO ()
19112447updateSwitchHeight new subscribed = do
19122448 oldHeight <- readIORef $ switchSubscribedHeight subscribed
19132449 when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
19142450 when (new /= invalidHeight) $ do --TODO: This 'when' should probably be an assertion
19152451 writeIORef (switchSubscribedHeight subscribed) $! new
1916− WeakBag.traverse (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
2452+ WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
19172453
1918−recalculateCoincidenceHeight :: CoincidenceSubscribed a -> IO ()
2454+recalculateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
19192455recalculateCoincidenceHeight subscribed = do
19202456 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
19212457 when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
19222458 height <- calculateCoincidenceHeight subscribed
19232459 when (height /= invalidHeight) $ do
19242460 writeIORef (coincidenceSubscribedHeight subscribed) $! height
1925− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
1926−
1927−getEventSubscribedHeight :: EventSubscribed a -> IO Height
1928−getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
2461+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
19292462
1930−calculateSwitchHeight :: SwitchSubscribed a -> IO Height
1931−calculateSwitchHeight subscribed = readIORef . eventSubscribedHeightRef . _eventSubscription_subscribed =<< readIORef (switchSubscribedCurrentParent subscribed)
2463+calculateSwitchHeight :: SwitchSubscribed x a -> IO Height
2464+calculateSwitchHeight subscribed = getEventSubscribedHeight . _eventSubscription_subscribed =<< readIORef (switchSubscribedCurrentParent subscribed)
19322465
1933−calculateCoincidenceHeight :: CoincidenceSubscribed a -> IO Height
2466+calculateCoincidenceHeight :: CoincidenceSubscribed x a -> IO Height
19342467calculateCoincidenceHeight subscribed = do
1935− outerHeight <- readIORef $ eventSubscribedHeightRef $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
1936− innerHeight <- maybe (return zeroHeight) (readIORef . eventSubscribedHeightRef) =<< readIORef (coincidenceSubscribedInnerParent subscribed)
2468+ outerHeight <- getEventSubscribedHeight $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
2469+ innerHeight <- maybe (return zeroHeight) getEventSubscribedHeight =<< readIORef (coincidenceSubscribedInnerParent subscribed)
19372470 return $ if outerHeight == invalidHeight || innerHeight == invalidHeight then invalidHeight else max outerHeight innerHeight
19382471
1939−data SomeSwitchSubscribed = forall a. SomeSwitchSubscribed {-# NOUNPACK #-} (SwitchSubscribed a)
2472+data SomeSwitchSubscribed x = forall a. SomeSwitchSubscribed {-# NOUNPACK #-} (SwitchSubscribed x a)
19402473
1941−invalidate :: IORef [SomeSwitchSubscribed] -> WeakList Invalidator -> IO (WeakList Invalidator)
2474+invalidate :: IORef [SomeSwitchSubscribed x] -> WeakList (Invalidator x) -> IO (WeakList (Invalidator x))
19422475invalidate toReconnectRef wis = do
19432476 forM_ wis $ \wi -> do
19442477 mi <- deRefWeak wi
@@ -1964,171 +2497,329 @@ invalidate toReconnectRef wis = do
19642497-- Reflex integration
19652498--------------------------------------------------------------------------------
19662499
1967−-- | The default, global Spider environment
1968−type Spider = SpiderEnv Global
1969−
19702500-- | Designates the default, global Spider timeline
1971−data Global
1972−
1973−{-# NOINLINE globalSpiderEnv #-}
1974−globalSpiderEnv :: SpiderEnv Global
1975−globalSpiderEnv = unsafePerformIO unsafeNewSpiderEnv
1976−
1977−-- | Stores all global data relevant to a particular Spider timeline; only one
1978−-- value should exist for each type @x@
1979−data SpiderEnv x = SpiderEnv
1980− { _spiderEnv_toUnsubscribe :: !(IORef [SomeEventSubscription])
1981− , _spiderEnv_lock :: !(MVar ())
1982− , _spiderEnv_cleanups :: !(IORef [IO ()])
1983−#ifdef DEBUG
1984− , _spiderEnv_depth :: !(IORef Int)
1985−#endif
1986− }
1987−type role SpiderEnv nominal
1988−
1989−instance GEq SpiderEnv where
1990− a `geq` b = if _spiderEnv_toUnsubscribe a == _spiderEnv_toUnsubscribe b
1991− then Just $ unsafeCoerce Refl -- This unsafeCoerce is safe because the same SpiderEnv can't have two different 'x' arguments
1992− else Nothing
1993−
1994−unsafeNewSpiderEnv :: forall x. IO (SpiderEnv x)
1995−unsafeNewSpiderEnv = do
1996− toUnsubscribe <- newIORef []
1997− lock <- newMVar ()
1998− cleanups <- newIORef []
1999−#ifdef DEBUG
2000− depthRef <- newIORef 0
2001−#endif
2002− return $ SpiderEnv
2003− { _spiderEnv_toUnsubscribe = toUnsubscribe
2004− , _spiderEnv_lock = lock
2005− , _spiderEnv_cleanups = cleanups
2006−#ifdef DEBUG
2007− , _spiderEnv_depth = depthRef
2008−#endif
2009− }
2010−
2011−-- | Create a new SpiderEnv
2012−newSpiderEnv :: IO (Some SpiderEnv)
2013−newSpiderEnv = Some.This <$> unsafeNewSpiderEnv
2014−
2015−newtype SpiderPullM x a = SpiderPullM (BehaviorM a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2016−
2017−newtype SpiderPushM x a = SpiderPushM (ComputeM a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2501+data SpiderTimeline x
2502+type role SpiderTimeline nominal
20182503
2019−instance R.Reflex (SpiderEnv x) where
2020− newtype Behavior (SpiderEnv x) a = SpiderBehavior { unSpiderBehavior :: Behavior a }
2021− newtype Event (SpiderEnv x) a = SpiderEvent { unSpiderEvent :: Event a }
2022− newtype Dynamic (SpiderEnv x) a = SpiderDynamic { unSpiderDynamic :: Dynamic Identity a } deriving (Functor, Applicative, Monad)
2023− newtype Incremental (SpiderEnv x) p a = SpiderIncremental { unSpiderIncremental :: Dynamic p a }
2024− type PullM (SpiderEnv x) = SpiderPullM x
2025− type PushM (SpiderEnv x) = SpiderPushM x
2026− {-# INLINABLE never #-}
2027− never = SpiderEvent EventNever
2028− {-# INLINABLE constant #-}
2029− constant = SpiderBehavior . BehaviorConst
2030− {-# INLINABLE push #-}
2031− push f = SpiderEvent . push (coerce f) . unSpiderEvent
2032− {-# INLINABLE pull #-}
2033− pull = SpiderBehavior . pull . coerce
2034− {-# INLINABLE merge #-}
2035− merge = SpiderEvent . merge . DynamicConst . (unsafeCoerce :: DMap k (R.Event (SpiderEnv x)) -> DMap k Event)
2036− {-# INLINABLE fan #-}
2037− fan e = R.EventSelector $ SpiderEvent . select (fan (unSpiderEvent e))
2038− {-# INLINABLE switch #-}
2039− switch = SpiderEvent . switch . (unsafeCoerce :: Behavior (R.Event (SpiderEnv x) a) -> Behavior (Event a)) . unSpiderBehavior
2040− {-# INLINABLE coincidence #-}
2041− coincidence = SpiderEvent . coincidence . (unsafeCoerce :: Event (R.Event (SpiderEnv x) a) -> Event (Event a)) . unSpiderEvent
2042− {-# INLINABLE current #-}
2043− current = SpiderBehavior . current . unSpiderDynamic
2044− {-# INLINABLE updated #-}
2045− updated = SpiderEvent . fmap runIdentity . updated . unSpiderDynamic
2046− {-# INLINABLE unsafeBuildDynamic #-}
2047− unsafeBuildDynamic readV0 v' = SpiderDynamic $ DynamicDynIdentity $ unsafeDyn (coerce readV0) $ addIdentity $ unSpiderEvent v'
2048− {-# INLINABLE unsafeBuildIncremental #-}
2049− unsafeBuildIncremental readV0 dv = SpiderIncremental $ DynamicDyn $ unsafeDyn (coerce readV0) $ unSpiderEvent dv
2050− {-# INLINABLE mergeIncremental #-}
2051− mergeIncremental = SpiderEvent . merge . (unsafeCoerce :: Dynamic R.PatchDMap (DMap k (R.Event (SpiderEnv x))) -> Dynamic R.PatchDMap (DMap k Event)) . unSpiderIncremental
2052− {-# INLINABLE currentIncremental #-}
2053− currentIncremental = SpiderBehavior . current . unSpiderIncremental
2054− {-# INLINABLE updatedIncremental #-}
2055− updatedIncremental = SpiderEvent . updated . unSpiderIncremental
2056− {-# INLINABLE incrementalToDynamic #-}
2057− incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ DynamicDynIdentity $ unsafeDyn (readBehaviorUntracked $ current i) $ flip push (updated i) $ \p -> do
2058− c <- readBehaviorUntracked $ current i
2059− return $ Identity <$> R.apply p c --TODO: Avoid the redundant 'apply'
2504+-- | The default, global Spider environment
2505+type Spider = SpiderTimeline Global
20602506
2061−instance R.MonadSample (SpiderEnv x) (EventM x) where
2507+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (EventM x) where
20622508 {-# INLINABLE sample #-}
20632509 sample (SpiderBehavior b) = readBehaviorUntracked b
20642510
2065−instance R.MonadHold (SpiderEnv x) (EventM x) where
2511+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (EventM x) where
20662512 {-# INLINABLE hold #-}
20672513 hold = holdSpiderEventM
20682514 {-# INLINABLE holdDyn #-}
20692515 holdDyn = holdDynSpiderEventM
20702516 {-# INLINABLE holdIncremental #-}
20712517 holdIncremental = holdIncrementalSpiderEventM
2518+ {-# INLINABLE buildDynamic #-}
2519+ buildDynamic = buildDynamicSpiderEventM
2520+ {-# INLINABLE headE #-}
2521+ headE = R.slowHeadE
2522+-- headE (SpiderEvent e) = SpiderEvent <$> Reflex.Spider.Internal.headE e
2523+ {-# INLINABLE now #-}
2524+ now = nowSpiderEventM
2525+
2526+instance Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPullM x) where
2527+ {-# INLINABLE sample #-}
2528+ sample = coerce . readBehaviorTracked . unSpiderBehavior
2529+
2530+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPushM x) where
2531+ {-# INLINABLE sample #-}
2532+ sample (SpiderBehavior b) = SpiderPushM $ readBehaviorUntracked b
2533+
2534+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderPushM x) where
2535+ {-# INLINABLE hold #-}
2536+ hold v0 e = Reflex.Class.current <$> Reflex.Class.holdDyn v0 e
2537+ {-# INLINABLE holdDyn #-}
2538+ holdDyn v0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce e
2539+ {-# INLINABLE holdIncremental #-}
2540+ holdIncremental v0 (SpiderEvent e) = SpiderPushM $ SpiderIncremental . dynamicHold <$> Reflex.Spider.Internal.hold v0 e
2541+ {-# INLINABLE buildDynamic #-}
2542+ buildDynamic getV0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce e
2543+ {-# INLINABLE headE #-}
2544+ headE = R.slowHeadE
2545+-- headE (SpiderEvent e) = SpiderPushM $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2546+ {-# INLINABLE now #-}
2547+ now = SpiderPushM nowSpiderEventM
20722548
2073−holdSpiderEventM :: a -> R.Event (SpiderEnv x) a -> EventM x (R.Behavior (SpiderEnv x) a)
2074−holdSpiderEventM v0 e = fmap (SpiderBehavior . BehaviorHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
20752549
2076−holdDynSpiderEventM :: a -> R.Event (SpiderEnv x) a -> EventM x (R.Dynamic (SpiderEnv x) a)
2077−holdDynSpiderEventM v0 e = fmap (SpiderDynamic . DynamicHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2550+instance HasSpiderTimeline x => Monad (Reflex.Class.Dynamic (SpiderTimeline x)) where
2551+ {-# INLINE return #-}
2552+ return = pure
2553+ {-# INLINE (>>=) #-}
2554+ x >>= f = SpiderDynamic $ dynamicDynIdentity $ newJoinDyn $ newMapDyn (unSpiderDynamic . f) $ unSpiderDynamic x
2555+ {-# INLINE (>>) #-}
2556+ (>>) = (*>)
2557+#if !MIN_VERSION_base(4,13,0)
2558+ {-# INLINE fail #-}
2559+ fail _ = error "Dynamic does not support 'fail'"
2560+#endif
2561+
2562+{-# INLINABLE newJoinDyn #-}
2563+newJoinDyn :: HasSpiderTimeline x => DynamicS x (Identity (DynamicS x (Identity a))) -> Reflex.Spider.Internal.Dyn x (Identity a)
2564+newJoinDyn d =
2565+ let readV0 = readBehaviorTracked . dynamicCurrent =<< readBehaviorTracked (dynamicCurrent d)
2566+ eOuter = Reflex.Spider.Internal.push (fmap (Just . Identity) . readBehaviorUntracked . dynamicCurrent . runIdentity) $ dynamicUpdated d
2567+ eInner = Reflex.Spider.Internal.switch $ dynamicUpdated <$> dynamicCurrent d
2568+ eBoth = Reflex.Spider.Internal.coincidence $ dynamicUpdated . runIdentity <$> dynamicUpdated d
2569+ v' = unSpiderEvent $ Reflex.Class.leftmost $ map SpiderEvent [eBoth, eOuter, eInner]
2570+ in Reflex.Spider.Internal.unsafeBuildDynamic readV0 v'
2571+
2572+instance HasSpiderTimeline x => Functor (Reflex.Class.Dynamic (SpiderTimeline x)) where
2573+ fmap = mapDynamicSpider
2574+ x <$ d = R.unsafeBuildDynamic (return x) $ x <$ R.updated d
2575+
2576+mapDynamicSpider :: HasSpiderTimeline x => (a -> b) -> Reflex.Class.Dynamic (SpiderTimeline x) a -> Reflex.Class.Dynamic (SpiderTimeline x) b
2577+mapDynamicSpider f = SpiderDynamic . newMapDyn f . unSpiderDynamic
2578+{-# INLINE [1] mapDynamicSpider #-}
2579+
2580+instance HasSpiderTimeline x => Applicative (Reflex.Class.Dynamic (SpiderTimeline x)) where
2581+ pure = SpiderDynamic . dynamicConst
2582+#if MIN_VERSION_base(4,10,0)
2583+ liftA2 f a b = SpiderDynamic $ Reflex.Spider.Internal.zipDynWith f (unSpiderDynamic a) (unSpiderDynamic b)
2584+#endif
2585+ SpiderDynamic a <*> SpiderDynamic b = SpiderDynamic $ Reflex.Spider.Internal.zipDynWith ($) a b
2586+ a *> b = R.unsafeBuildDynamic (R.sample $ R.current b) $ R.leftmost [R.updated b, R.tag (R.current b) $ R.updated a]
2587+ (<*) = flip (*>) -- There are no effects, so order doesn't matter
2588+
2589+holdSpiderEventM :: HasSpiderTimeline x => a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Behavior (SpiderTimeline x) a)
2590+holdSpiderEventM v0 e = fmap (SpiderBehavior . behaviorHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2591+
2592+holdDynSpiderEventM :: HasSpiderTimeline x => a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Dynamic (SpiderTimeline x) a)
2593+holdDynSpiderEventM v0 e = fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
20782594
2079−holdIncrementalSpiderEventM :: R.Patch p => a -> R.Event (SpiderEnv x) (p a) -> EventM x (R.Incremental (SpiderEnv x) p a)
2080−holdIncrementalSpiderEventM v0 e = fmap (SpiderIncremental . DynamicHold) $ hold v0 $ unSpiderEvent e
2595+holdIncrementalSpiderEventM :: (HasSpiderTimeline x, Patch p) => PatchTarget p -> Reflex.Class.Event (SpiderTimeline x) p -> EventM x (Reflex.Class.Incremental (SpiderTimeline x) p)
2596+holdIncrementalSpiderEventM v0 e = fmap (SpiderIncremental . dynamicHold) $ Reflex.Spider.Internal.hold v0 $ unSpiderEvent e
20812597
2082−instance R.MonadHold (SpiderEnv x) (SpiderHost x) where
2598+buildDynamicSpiderEventM :: HasSpiderTimeline x => SpiderPushM x a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Dynamic (SpiderTimeline x) a)
2599+buildDynamicSpiderEventM getV0 e = fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce $ unSpiderEvent e
2600+
2601+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderHost x) where
20832602 {-# INLINABLE hold #-}
2084− hold v0 e = R.runHostFrame $ R.hold v0 e
2603+ hold v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.hold v0 e
20852604 {-# INLINABLE holdDyn #-}
2086− holdDyn v0 e = R.runHostFrame $ R.holdDyn v0 e
2605+ holdDyn v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.holdDyn v0 e
20872606 {-# INLINABLE holdIncremental #-}
2088− holdIncremental v0 e = R.runHostFrame $ R.holdIncremental v0 e
2607+ holdIncremental v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.holdIncremental v0 e
2608+ {-# INLINABLE buildDynamic #-}
2609+ buildDynamic getV0 e = runFrame . runSpiderHostFrame $ Reflex.Class.buildDynamic getV0 e
2610+ {-# INLINABLE headE #-}
2611+ headE e = runFrame . runSpiderHostFrame $ Reflex.Class.headE e
2612+ {-# INLINABLE now #-}
2613+ now = runFrame . runSpiderHostFrame $ Reflex.Class.now
2614+
2615+
2616+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHostFrame x) where
2617+ sample = SpiderHostFrame . readBehaviorUntracked . unSpiderBehavior --TODO: This can cause problems with laziness, so we should get rid of it if we can
20892618
2090−instance R.MonadSample (SpiderEnv x) (SpiderHost x) where
2619+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderHostFrame x) where
2620+ {-# INLINABLE hold #-}
2621+ hold v0 e = SpiderHostFrame $ fmap (SpiderBehavior . behaviorHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2622+ {-# INLINABLE holdDyn #-}
2623+ holdDyn v0 e = SpiderHostFrame $ fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2624+ {-# INLINABLE holdIncremental #-}
2625+ holdIncremental v0 e = SpiderHostFrame $ fmap (SpiderIncremental . dynamicHold) $ Reflex.Spider.Internal.hold v0 $ unSpiderEvent e
2626+ {-# INLINABLE buildDynamic #-}
2627+ buildDynamic getV0 e = SpiderHostFrame $ fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce $ unSpiderEvent e
2628+ {-# INLINABLE headE #-}
2629+ headE = R.slowHeadE
2630+-- headE (SpiderEvent e) = SpiderHostFrame $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2631+ {-# INLINABLE now #-}
2632+ now = SpiderHostFrame Reflex.Class.now
2633+
2634+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHost x) where
20912635 {-# INLINABLE sample #-}
20922636 sample = runFrame . readBehaviorUntracked . unSpiderBehavior
20932637
2094−instance R.MonadSample (SpiderEnv x) (SpiderPullM x) where
2095− {-# INLINABLE sample #-}
2096− sample = coerce . readBehaviorTracked . unSpiderBehavior
2097−
2098−instance R.MonadSample (SpiderEnv x) (SpiderPushM x) where
2638+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
20992639 {-# INLINABLE sample #-}
2100− sample (SpiderBehavior b) = SpiderPushM $ readBehaviorUntracked b
2640+ sample = Reflex.Spider.Internal.ReadPhase . Reflex.Class.sample
21012641
2102−instance R.MonadHold (SpiderEnv x) (SpiderPushM x) where
2642+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
21032643 {-# INLINABLE hold #-}
2104− hold v0 e = R.current <$> R.holdDyn v0 e
2644+ hold v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.hold v0 e
21052645 {-# INLINABLE holdDyn #-}
2106− holdDyn v0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . DynamicHoldIdentity) $ hold v0 $ addIdentity e
2646+ holdDyn v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.holdDyn v0 e
21072647 {-# INLINABLE holdIncremental #-}
2108− holdIncremental v0 (SpiderEvent e) = SpiderPushM $ SpiderIncremental . DynamicHold <$> hold v0 e
2648+ holdIncremental v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.holdIncremental v0 e
2649+ {-# INLINABLE buildDynamic #-}
2650+ buildDynamic getV0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.buildDynamic getV0 e
2651+ {-# INLINABLE headE #-}
2652+ headE e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.headE e
2653+ {-# INLINABLE now #-}
2654+ now = Reflex.Spider.Internal.ReadPhase Reflex.Class.now
21092655
2110−data RootTrigger a = forall k. GCompare k => RootTrigger (SubscriberList a, IORef (DMap k Identity), k a)
2111−newtype SpiderEventHandle a = SpiderEventHandle { unSpiderEventHandle :: EventSubscription a }
2656+--------------------------------------------------------------------------------
2657+-- Deprecated items
2658+--------------------------------------------------------------------------------
21122659
2113−instance R.MonadSubscribeEvent (SpiderEnv x) (SpiderHostFrame x) where
2660+-- | 'SpiderEnv' is the old name for 'SpiderTimeline'
2661+{-# DEPRECATED SpiderEnv "Use 'SpiderTimelineEnv' instead" #-}
2662+type SpiderEnv = SpiderTimeline
2663+instance HasSpiderTimeline x => Reflex.Host.Class.MonadSubscribeEvent (SpiderTimeline x) (SpiderHostFrame x) where
21142664 {-# INLINABLE subscribeEvent #-}
21152665 subscribeEvent e = SpiderHostFrame $ do
2116− subscription <- subscribe (unSpiderEvent e) SubscriberHandle --TODO: Unsubscribe eventually (manually and/or with weak ref)
2117− return $ SpiderEventHandle subscription
2118−
2119−instance R.ReflexHost (SpiderEnv x) where
2120− type EventTrigger (SpiderEnv x) = RootTrigger
2121− type EventHandle (SpiderEnv x) = SpiderEventHandle
2122− type HostFrame (SpiderEnv x) = SpiderHostFrame x
2123−
2124−instance R.MonadReadEvent (SpiderEnv x) (ReadPhase x) where
2125− {-# INLINABLE readEvent #-}
2126− readEvent h = ReadPhase $ fmap (fmap return) $ liftIO $ do
2127− let EventSubscription sln subscribed = unSpiderEventHandle h
2128− result <- readEventSubscribed subscribed
2129− touch sln
2666+ --TODO: Unsubscribe eventually (manually and/or with weak ref)
2667+ val <- liftIO $ newIORef Nothing
2668+ subscription <- subscribe (unSpiderEvent e) $ Subscriber
2669+ { subscriberPropagate = \a -> do
2670+ liftIO $ writeIORef val $ Just a
2671+ scheduleClear val
2672+ , subscriberInvalidateHeight = \_ -> return ()
2673+ , subscriberRecalculateHeight = \_ -> return ()
2674+ }
2675+ return $ SpiderEventHandle
2676+ { spiderEventHandleSubscription = subscription
2677+ , spiderEventHandleValue = val
2678+ }
2679+
2680+instance HasSpiderTimeline x => Reflex.Host.Class.ReflexHost (SpiderTimeline x) where
2681+ type EventTrigger (SpiderTimeline x) = RootTrigger x
2682+ type EventHandle (SpiderTimeline x) = SpiderEventHandle x
2683+ type HostFrame (SpiderTimeline x) = SpiderHostFrame x
2684+
2685+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReadEvent (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2686+ {-# NOINLINE readEvent #-}
2687+ readEvent h = Reflex.Spider.Internal.ReadPhase $ fmap (fmap return) $ liftIO $ do
2688+ result <- readIORef $ spiderEventHandleValue h
2689+ touch h
21302690 return result
21312691
2692+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHost x) where
2693+ newEventWithTrigger = SpiderHost . fmap SpiderEvent . newEventWithTriggerIO
2694+ newFanEventWithTrigger f = SpiderHost $ do
2695+ es <- newFanEventWithTriggerIO f
2696+ return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
2697+
2698+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHostFrame x) where
2699+ newEventWithTrigger = SpiderHostFrame . EventM . liftIO . fmap SpiderEvent . newEventWithTriggerIO
2700+ newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
2701+ es <- newFanEventWithTriggerIO f
2702+ return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
2703+
2704+instance HasSpiderTimeline x => Reflex.Host.Class.MonadSubscribeEvent (SpiderTimeline x) (SpiderHost x) where
2705+ {-# INLINABLE subscribeEvent #-}
2706+ subscribeEvent = runFrame . runSpiderHostFrame . Reflex.Host.Class.subscribeEvent
2707+
2708+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexHost (SpiderTimeline x) (SpiderHost x) where
2709+ type ReadPhase (SpiderHost x) = Reflex.Spider.Internal.ReadPhase x
2710+ fireEventsAndRead es (Reflex.Spider.Internal.ReadPhase a) = run es a
2711+ runHostFrame = runFrame . runSpiderHostFrame
2712+
2713+unsafeNewSpiderTimelineEnv :: forall x. IO (SpiderTimelineEnv x)
2714+unsafeNewSpiderTimelineEnv = do
2715+ lock <- newMVar ()
2716+ env <- newEventEnv
2717+#ifdef DEBUG
2718+ depthRef <- newIORef 0
2719+#endif
2720+ return $ STE $ SpiderTimelineEnv
2721+ { _spiderTimeline_lock = lock
2722+ , _spiderTimeline_eventEnv = env
2723+#ifdef DEBUG
2724+ , _spiderTimeline_depth = depthRef
2725+#endif
2726+ }
2727+
2728+-- | Create a new SpiderTimelineEnv
2729+newSpiderTimeline :: IO (Some SpiderTimelineEnv)
2730+newSpiderTimeline = withSpiderTimeline (pure . Some)
2731+
2732+data LocalSpiderTimeline (x :: Type) s
2733+
2734+instance Reifies s (SpiderTimelineEnv x) =>
2735+ HasSpiderTimeline (LocalSpiderTimeline x s) where
2736+ spiderTimeline = localSpiderTimeline Proxy $ reflect (Proxy :: Proxy s)
2737+
2738+localSpiderTimeline
2739+ :: proxy s
2740+ -> SpiderTimelineEnv x
2741+ -> SpiderTimelineEnv (LocalSpiderTimeline x s)
2742+localSpiderTimeline _ = coerce
2743+
2744+-- | Pass a new timeline to the given function.
2745+withSpiderTimeline :: (forall x. HasSpiderTimeline x => SpiderTimelineEnv x -> IO r) -> IO r
2746+withSpiderTimeline k = do
2747+ env <- unsafeNewSpiderTimelineEnv
2748+ reify env $ \s -> k $ localSpiderTimeline s env
2749+
2750+newtype SpiderPullM (x :: Type) a = SpiderPullM (BehaviorM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2751+
2752+type ComputeM = EventM
2753+
2754+newtype SpiderPushM (x :: Type) a = SpiderPushM (ComputeM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2755+
2756+instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
2757+ {-# SPECIALIZE instance R.Reflex (SpiderTimeline Global) #-}
2758+ newtype Behavior (SpiderTimeline x) a = SpiderBehavior { unSpiderBehavior :: Behavior x a }
2759+ newtype Event (SpiderTimeline x) a = SpiderEvent { unSpiderEvent :: Event x a }
2760+ newtype Dynamic (SpiderTimeline x) a = SpiderDynamic { unSpiderDynamic :: DynamicS x (Identity a) } -- deriving (Functor, Applicative, Monad)
2761+ newtype Incremental (SpiderTimeline x) p = SpiderIncremental { unSpiderIncremental :: DynamicS x p }
2762+ type PullM (SpiderTimeline x) = SpiderPullM x
2763+ type PushM (SpiderTimeline x) = SpiderPushM x
2764+ {-# INLINABLE never #-}
2765+ never = SpiderEvent eventNever
2766+ {-# INLINABLE constant #-}
2767+ constant = SpiderBehavior . behaviorConst
2768+ {-# INLINE push #-}
2769+ push f = SpiderEvent . push (coerce f) . unSpiderEvent
2770+ {-# INLINE pushCheap #-}
2771+ pushCheap f = SpiderEvent . pushCheap (coerce f) . unSpiderEvent
2772+ {-# INLINABLE pull #-}
2773+ pull = SpiderBehavior . pull . coerce
2774+ {-# INLINABLE fanG #-}
2775+ fanG e = R.EventSelectorG $ SpiderEvent . selectG (fanG (unSpiderEvent e))
2776+ {-# INLINABLE mergeG #-}
2777+ mergeG
2778+ :: forall k2 (k :: k2 -> *) q (v :: k2 -> *). GCompare k
2779+ => (forall a. q a -> R.Event (SpiderTimeline x) (v a))
2780+ -> DMap k q
2781+ -> R.Event (SpiderTimeline x) (DMap k v)
2782+ mergeG nt = SpiderEvent . mergeG (unSpiderEvent #. nt) . dynamicConst
2783+ {-# INLINABLE switch #-}
2784+ switch = SpiderEvent . switch . (coerce :: Behavior x (R.Event (SpiderTimeline x) a) -> Behavior x (Event x a)) . unSpiderBehavior
2785+ {-# INLINABLE coincidence #-}
2786+ coincidence = SpiderEvent . coincidence . (coerce :: Event x (R.Event (SpiderTimeline x) a) -> Event x (Event x a)) . unSpiderEvent
2787+ {-# INLINABLE current #-}
2788+ current = SpiderBehavior . dynamicCurrent . unSpiderDynamic
2789+ {-# INLINABLE updated #-}
2790+ updated = SpiderEvent #. dynamicUpdated .# fmap coerce . unSpiderDynamic
2791+ {-# INLINABLE unsafeBuildDynamic #-}
2792+ unsafeBuildDynamic readV0 v' = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (coerce readV0) $ coerce $ unSpiderEvent v'
2793+ {-# INLINABLE unsafeBuildIncremental #-}
2794+ unsafeBuildIncremental readV0 dv = SpiderIncremental $ dynamicDyn $ unsafeBuildDynamic (coerce readV0) $ unSpiderEvent dv
2795+ {-# INLINABLE mergeIncrementalG #-}
2796+ mergeIncrementalG nt = SpiderEvent #. mergeG (coerce #. nt) .# unSpiderIncremental
2797+ {-# INLINABLE mergeIncrementalWithMoveG #-}
2798+ mergeIncrementalWithMoveG nt = SpiderEvent #. mergeWithMove (coerce #. nt) .# unSpiderIncremental
2799+ {-# INLINABLE currentIncremental #-}
2800+ currentIncremental = SpiderBehavior . dynamicCurrent . unSpiderIncremental
2801+ {-# INLINABLE updatedIncremental #-}
2802+ updatedIncremental = SpiderEvent . dynamicUpdated . unSpiderIncremental
2803+ {-# INLINABLE incrementalToDynamic #-}
2804+ incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (readBehaviorUntracked $ dynamicCurrent i) $ flip push (dynamicUpdated i) $ \p -> do
2805+ c <- readBehaviorUntracked $ dynamicCurrent i
2806+ return $ Identity <$> apply p c --TODO: Avoid the redundant 'apply'
2807+ eventCoercion Coercion = Coercion
2808+ behaviorCoercion Coercion = Coercion
2809+ dynamicCoercion Coercion = Coercion
2810+ incrementalCoercion Coercion Coercion = Coercion
2811+ {-# INLINABLE mergeIntIncremental #-}
2812+ mergeIntIncremental = SpiderEvent . mergeInt . coerce
2813+ {-# INLINABLE fanInt #-}
2814+ fanInt e = R.EventSelectorInt $ SpiderEvent . selectInt (fanInt (unSpiderEvent e))
2815+
2816+data RootTrigger x a = forall k. GCompare k => RootTrigger (WeakBag (Subscriber x a), IORef (DMap k Identity), k a)
2817+
2818+data SpiderEventHandle x a = SpiderEventHandle
2819+ { spiderEventHandleSubscription :: EventSubscription x
2820+ , spiderEventHandleValue :: IORef (Maybe a)
2821+ }
2822+
21322823instance MonadRef (EventM x) where
21332824 type Ref (EventM x) = Ref IO
21342825 {-# INLINABLE newRef #-}
@@ -2143,7 +2834,7 @@ instance MonadAtomicRef (EventM x) where
21432834 atomicModifyRef r f = liftIO $ atomicModifyRef r f
21442835
21452836-- | The monad for actions that manipulate a Spider timeline identified by @x@
2146−newtype SpiderHost x a = SpiderHost { unSpiderHost :: ReaderT (SpiderEnv x) IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2837+newtype SpiderHost (x :: Type) a = SpiderHost { unSpiderHost :: IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
21472838
21482839instance Monad (SpiderHost x) where
21492840 {-# INLINABLE (>>=) #-}
@@ -2152,15 +2843,27 @@ instance Monad (SpiderHost x) where
21522843 SpiderHost x >> SpiderHost y = SpiderHost $ x >> y
21532844 {-# INLINABLE return #-}
21542845 return x = SpiderHost $ return x
2846+#if !MIN_VERSION_base(4,13,0)
2847+ {-# INLINABLE fail #-}
2848+ fail = MonadFail.fail
2849+#endif
2850+
2851+instance MonadFail (SpiderHost x) where
21552852 {-# INLINABLE fail #-}
2156− fail s = SpiderHost $ fail s
2853+ fail s = SpiderHost $ MonadFail.fail s
21572854
21582855-- | Run an action affecting the global Spider timeline; this will be guarded by
21592856-- a mutex for that timeline
21602857runSpiderHost :: SpiderHost Global a -> IO a
2161−runSpiderHost (SpiderHost a) = runReaderT a globalSpiderEnv
2858+runSpiderHost (SpiderHost a) = a
21622859
2163−newtype SpiderHostFrame x a = SpiderHostFrame { runSpiderHostFrame :: EventM x a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2860+-- | Run an action affecting a given Spider timeline; this will be guarded by a
2861+-- mutex for that timeline
2862+runSpiderHostForTimeline :: SpiderHost x a -> SpiderTimelineEnv x -> IO a
2863+runSpiderHostForTimeline (SpiderHost a) _ = a
2864+
2865+newtype SpiderHostFrame (x :: Type) a = SpiderHostFrame { runSpiderHostFrame :: EventM x a }
2866+ deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
21642867
21652868instance Monad (SpiderHostFrame x) where
21662869 {-# INLINABLE (>>=) #-}
@@ -2169,30 +2872,21 @@ instance Monad (SpiderHostFrame x) where
21692872 SpiderHostFrame x >> SpiderHostFrame y = SpiderHostFrame $ x >> y
21702873 {-# INLINABLE return #-}
21712874 return x = SpiderHostFrame $ return x
2875+#if !MIN_VERSION_base(4,13,0)
21722876 {-# INLINABLE fail #-}
21732877 fail s = SpiderHostFrame $ fail s
2878+#endif
21742879
2175−instance R.MonadSample (SpiderEnv x) (SpiderHostFrame x) where
2176− sample = SpiderHostFrame . readBehaviorUntracked . unSpiderBehavior --TODO: This can cause problems with laziness, so we should get rid of it if we can
2177−
2178−addIdentity :: Event a -> Event (Identity a)
2179−--addIdentity = fmap Identity
2180−addIdentity = unsafeCoerce
2181−
2182−instance R.MonadHold (SpiderEnv x) (SpiderHostFrame x) where
2183− {-# INLINABLE hold #-}
2184− hold v0 e = SpiderHostFrame $ fmap (SpiderBehavior . BehaviorHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2185− {-# INLINABLE holdDyn #-}
2186− holdDyn v0 e = SpiderHostFrame $ fmap (SpiderDynamic . DynamicHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2187− {-# INLINABLE holdIncremental #-}
2188− holdIncremental v0 e = SpiderHostFrame $ fmap (SpiderIncremental . DynamicHold) $ hold v0 $ unSpiderEvent e
2880+instance NotReady (SpiderTimeline x) (SpiderHostFrame x) where
2881+ notReadyUntil _ = pure ()
2882+ notReady = pure ()
21892883
2190−newEventWithTriggerIO :: forall a. (RootTrigger a -> IO (IO ())) -> IO (Event a)
2884+newEventWithTriggerIO :: forall x a. HasSpiderTimeline x => (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
21912885newEventWithTriggerIO f = do
21922886 es <- newFanEventWithTriggerIO $ \Refl -> f
21932887 return $ select es Refl
21942888
2195−newFanEventWithTriggerIO :: GCompare k => (forall a. k a -> RootTrigger a -> IO (IO ())) -> IO (EventSelector k)
2889+newFanEventWithTriggerIO :: (HasSpiderTimeline x, GCompare k) => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
21962890newFanEventWithTriggerIO f = do
21972891 occRef <- newIORef DMap.empty
21982892 subscribedRef <- newIORef DMap.empty
@@ -2201,48 +2895,10 @@ newFanEventWithTriggerIO f = do
22012895 , rootSubscribed = subscribedRef
22022896 , rootInit = f
22032897 }
2204− return $ EventSelector $ \k -> EventRoot k r
2205−
2206−instance R.MonadReflexCreateTrigger (SpiderEnv x) (SpiderHost x) where
2207− newEventWithTrigger = SpiderHost . lift . fmap SpiderEvent . newEventWithTriggerIO
2208− newFanEventWithTrigger f = SpiderHost $ lift $ do
2209− es <- newFanEventWithTriggerIO f
2210− return $ R.EventSelector $ SpiderEvent . select es
2211−
2212−instance R.MonadReflexCreateTrigger (SpiderEnv x) (SpiderHostFrame x) where
2213− newEventWithTrigger = SpiderHostFrame . EventM . liftIO . fmap SpiderEvent . newEventWithTriggerIO
2214− newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
2215− es <- newFanEventWithTriggerIO f
2216− return $ R.EventSelector $ SpiderEvent . select es
2217−
2218−instance R.MonadSubscribeEvent (SpiderEnv x) (SpiderHost x) where
2219− {-# INLINABLE subscribeEvent #-}
2220− subscribeEvent = subscribeEventSpiderHost
2221−
2222−subscribeEventSpiderHost :: R.Event (SpiderEnv x) a -> SpiderHost x (R.EventHandle (SpiderEnv x) a)
2223−subscribeEventSpiderHost e = do
2224− subscription <- runFrame $ subscribe (unSpiderEvent e) SubscriberHandle --TODO: Unsubscribe eventually (manually and/or with weak ref)
2225− return $ SpiderEventHandle subscription
2898+ return $ EventSelector $ \k -> eventRoot k r
22262899
22272900newtype ReadPhase x a = ReadPhase (ResultM x a) deriving (Functor, Applicative, Monad, MonadFix)
22282901
2229−instance R.MonadSample (SpiderEnv x) (ReadPhase x) where
2230− {-# INLINABLE sample #-}
2231− sample = ReadPhase . R.sample
2232−
2233−instance R.MonadHold (SpiderEnv x) (ReadPhase x) where
2234− {-# INLINABLE hold #-}
2235− hold v0 e = ReadPhase $ R.hold v0 e
2236− {-# INLINABLE holdDyn #-}
2237− holdDyn v0 e = ReadPhase $ R.holdDyn v0 e
2238− {-# INLINABLE holdIncremental #-}
2239− holdIncremental v0 e = ReadPhase $ R.holdIncremental v0 e
2240−
2241−instance R.MonadReflexHost (SpiderEnv x) (SpiderHost x) where
2242− type ReadPhase (SpiderHost x) = ReadPhase x
2243− fireEventsAndRead es (ReadPhase a) = run es a
2244− runHostFrame = runFrame . runSpiderHostFrame
2245−
22462902instance MonadRef (SpiderHost x) where
22472903 type Ref (SpiderHost x) = Ref IO
22482904 newRef = SpiderHost . newRef
@@ -2260,3 +2916,15 @@ instance MonadRef (SpiderHostFrame x) where
22602916
22612917instance MonadAtomicRef (SpiderHostFrame x) where
22622918 atomicModifyRef r = SpiderHostFrame . atomicModifyRef r
2919+
2920+instance PrimMonad (SpiderHostFrame x) where
2921+ type PrimState (SpiderHostFrame x) = PrimState IO
2922+ primitive = SpiderHostFrame . EventM . primitive
2923+
2924+instance NotReady (SpiderTimeline x) (SpiderHost x) where
2925+ notReadyUntil _ = return ()
2926+ notReady = return ()
2927+
2928+instance HasSpiderTimeline x => NotReady (SpiderTimeline x) (PerformEventT (SpiderTimeline x) (SpiderHost x)) where
2929+ notReadyUntil _ = return ()
2930+ notReady = return ()