@@ -1,82 +1,210 @@
1−{-# LANGUAGE CPP, ExistentialQuantification, GADTs, ScopedTypeVariables, TypeFamilies, FlexibleInstances, MultiParamTypeClasses, GeneralizedNewtypeDeriving, RankNTypes, BangPatterns, UndecidableInstances, EmptyDataDecls, RecursiveDo, RoleAnnotations, LambdaCase, TypeOperators #-}
1+{-# LANGUAGE BangPatterns #-}
3+{-# LANGUAGE ConstraintKinds #-}
4+{-# LANGUAGE EmptyDataDecls #-}
5+{-# LANGUAGE ExistentialQuantification #-}
6+{-# LANGUAGE FlexibleContexts #-}
7+{-# LANGUAGE FlexibleInstances #-}
8+{-# LANGUAGE FunctionalDependencies #-}
10+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
11+{-# LANGUAGE LambdaCase #-}
12+{-# LANGUAGE RankNTypes #-}
13+{-# LANGUAGE RoleAnnotations #-}
14+{-# LANGUAGE ScopedTypeVariables #-}
15+{-# LANGUAGE TypeFamilies #-}
16+{-# LANGUAGE TypeOperators #-}
17+{-# LANGUAGE UndecidableInstances #-}
18+{-# LANGUAGE PolyKinds #-}
19+{-# LANGUAGE DeriveFunctor #-}
20+{-# LANGUAGE StandaloneDeriving #-}
21+{-# LANGUAGE InstanceSigs #-}
22+{-# LANGUAGE MultiWayIf #-}
24+#ifdef USE_REFLEX_OPTIMIZER
25+{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
27+{-# OPTIONS_GHC -Wunused-binds #-}
28+-- | This module is the implementation of the 'Spider' 'Reflex' engine. It uses
29+-- a graph traversal algorithm to propagate 'Event's and 'Behavior's.
2−module Reflex.Spider.Internal where
30+module Reflex.Spider.Internal (module Reflex.Spider.Internal) where
4−import qualified Reflex.Class as R
5−import qualified Reflex.Host.Class as R
7−import Data.IORef
32+#if MIN_VERSION_base(4,10,0)
8−import System.Mem.Weak
33+import Control.Applicative (liftA2)
9−import Data.Foldable
34+#endif
10−import Data.Traversable
35+import Control.Concurrent
36+import Control.Exception
11−import Control.Monad hiding (mapM, mapM_, forM_, forM, sequence)
37+import Control.Monad hiding (forM, forM_, mapM, mapM_)
12−import Control.Monad.Identity hiding (mapM, mapM_, forM_, forM, sequence)
38+import Control.Monad.Exception
39+import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_)
13−import Control.Monad.Reader hiding (mapM, mapM_, forM_, forM, sequence)
40+import Control.Monad.Primitive
14−import GHC.Exts
41+import Control.Monad.Reader.Class
15−import Control.Applicative -- Unconditionally import, because otherwise it breaks on GHC 7.10.1RC2
42+import Control.Monad.IO.Class
43+import Control.Monad.ReaderIO
44+import Control.Monad.Ref
45+import Control.Monad.Fail (MonadFail)
46+import qualified Control.Monad.Fail as MonadFail
16−import Data.Dependent.Map (DMap, DSum (..))
49+import Data.Dependent.Map (DMap)
17import qualified Data.Dependent.Map as DMap
50import 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
54+import Data.Foldable hiding (concat, elem, sequence_)
55+import Data.Functor.Constant
56+import Data.Functor.Misc
57+import Data.Functor.Product
18import Data.GADT.Compare
58import Data.GADT.Compare
19−import Data.Maybe
59+import Data.IntMap.Strict (IntMap)
20−import Data.IntMap (IntMap)
21−import qualified Data.IntMap as IntMap
60+import qualified Data.IntMap.Strict as IntMap
22−import Control.Monad.Ref
61+import Data.IORef
23−import Control.Monad.Exception
62+import Data.Kind (Type)
63+import Data.Maybe hiding (mapMaybe)
24−import Data.Monoid ((<>))
64+import Data.Monoid (mempty, (<>))
67+import Data.Traversable
68+import Data.Type.Equality ((:~:)(Refl))
69+import Data.Witherable (Filterable, mapMaybe)
70+import GHC.Exts hiding (toList)
71+import GHC.IORef (IORef (..))
73+import Reflex.FastWeak
26import System.IO.Unsafe
74import System.IO.Unsafe
75+import System.Mem.Weak
27import Unsafe.Coerce
76import Unsafe.Coerce
28−import Control.Monad.Primitive
30−-- Note: must come last to silence warnings due to AMP on GHC < 7.10
78+#ifdef MIN_VERSION_semialign
79+#if MIN_VERSION_these(0,8,0)
80+import Data.These.Combinators (justThese)
82+#if MIN_VERSION_semialign(1,1,0)
83+import Data.Zip (Zip (..))
31−import Prelude hiding (mapM, mapM_, any, sequence, concat)
88+import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
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)
96+import Data.FastWeakBag (FastWeakBag, FastWeakBagTicket)
97+import qualified Data.FastWeakBag as FastWeakBag
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)
104+import qualified Data.WeakBag as WeakBag
105+import qualified Reflex.Class
106+import qualified Reflex.Class as R
107+import qualified Reflex.Host.Class
108+import Reflex.NotReady.Class
110+import qualified Data.Patch.DMapWithMove as PatchDMapWithMove
111+import Reflex.PerformEvent.Base (PerformEventT)
113+#ifdef DEBUG_TRACE_EVENTS
114+import qualified Data.ByteString.Char8 as BS8
115+import System.IO (stderr)
116+import Data.List (isPrefixOf)
119+-- TODO stdout might not be the best channel for debug output
120+debugStrLn :: String -> IO ()
121+debugStrLn = putStrLn
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"
33debugPropagate :: Bool
132debugPropagate :: Bool
35debugInvalidateHeight :: Bool
134debugInvalidateHeight :: Bool
37−#ifdef DEBUG
136+debugInvalidate :: Bool
39#define DEBUG_NODEIDS
139#define DEBUG_NODEIDS
141+#ifdef DEBUG_TRACE_PROPAGATION
41debugPropagate = True
142debugPropagate = True
144+debugPropagate = False
147+#ifdef DEBUG_TRACE_HEIGHT
43debugInvalidateHeight = True
148debugInvalidateHeight = True
150+debugInvalidateHeight = False
153+#ifdef DEBUG_TRACE_INVALIDATION
154+debugInvalidate = True
156+debugInvalidate = False
45class HasNodeId a where
159class HasNodeId a where
46 getNodeId :: a -> Int
160 getNodeId :: a -> Int
48−instance HasNodeId (Hold a) where
162+instance HasNodeId (CacheSubscribed x a) where
49− getNodeId = holdNodeId
163+ getNodeId = _cacheSubscribed_nodeId
51−instance HasNodeId (PushSubscribed a b) where
165+instance HasNodeId (FanInt x a) where
52− getNodeId = pushSubscribedNodeId
166+ getNodeId = _fanInt_nodeId
54−instance HasNodeId (SwitchSubscribed a) where
168+instance HasNodeId (Hold x p) where
55− getNodeId = switchSubscribedNodeId
169+ getNodeId = holdNodeId
57−instance HasNodeId (MergeSubscribed a) where
171+instance HasNodeId (SwitchSubscribed x a) where
58− getNodeId = mergeSubscribedNodeId
172+ getNodeId = switchSubscribedNodeId
60−instance HasNodeId (FanSubscribed a) where
174+instance HasNodeId (FanSubscribed x v a) where
61 getNodeId = fanSubscribedNodeId
175 getNodeId = fanSubscribedNodeId
63−instance HasNodeId (CoincidenceSubscribed a) where
177+instance HasNodeId (CoincidenceSubscribed x a) where
64 getNodeId = coincidenceSubscribedNodeId
178 getNodeId = coincidenceSubscribedNodeId
66−instance HasNodeId (RootSubscribed a) where
180+instance HasNodeId (RootSubscribed x a) where
67 getNodeId = rootSubscribedNodeId
181 getNodeId = rootSubscribedNodeId
183+instance HasNodeId (Pull x a) where
184+ getNodeId = pullNodeId
186+{-# INLINE showNodeId #-}
69showNodeId :: HasNodeId a => a -> String
187showNodeId :: HasNodeId a => a -> String
70−showNodeId = ("#"<>) . show . getNodeId
188+showNodeId = showNodeId' . getNodeId
190+showNodeId' :: Int -> String
191+showNodeId' = ("#"<>) . show
74debugPropagate = False
196debugPropagate = False
76debugInvalidateHeight = False
197debugInvalidateHeight = False
198+debugInvalidate = False
200+-- This must be inline, or error messages will cause memory leaks due to retaining the node in question
201+{-# INLINE showNodeId #-}
78showNodeId :: a -> String
202showNodeId :: a -> String
79−showNodeId = const ""
203+showNodeId _ = ""
205+{-# INLINE showNodeId' #-}
206+showNodeId' :: Int -> String
@@ -85,945 +213,1632 @@ showNodeId = const ""
85nextNodeIdRef :: IORef Int
213nextNodeIdRef :: IORef Int
86nextNodeIdRef = unsafePerformIO $ newIORef 1
214nextNodeIdRef = unsafePerformIO $ newIORef 1
88−{-# NOINLINE unsafeNodeId #-}
216+newNodeId :: IO Int
89−unsafeNodeId :: a -> Int
90−unsafeNodeId a = unsafePerformIO $ do
92− atomicModifyIORef' nextNodeIdRef $ \n -> (succ n, n)
217+newNodeId = atomicModifyIORef' nextNodeIdRef $ \n -> (succ n, n)
220+--------------------------------------------------------------------------------
222+--------------------------------------------------------------------------------
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)
231+unsubscribe :: EventSubscription x -> IO ()
232+unsubscribe (EventSubscription u _) = u
234+--------------------------------------------------------------------------------
236+--------------------------------------------------------------------------------
238+newtype Event x a = Event { unEvent :: Subscriber x a -> EventM x (EventSubscription x, Maybe a) }
240+{-# INLINE subscribeAndRead #-}
241+subscribeAndRead :: Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
242+subscribeAndRead = unEvent
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
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
259+ mapM_ (subscriberPropagate sub) mb
261+ occ' <- join <$> mapM f occ
262+ return (subscription, occ')
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 ()
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
283+ liftIO $ case occ of
284+ Nothing -> writeIORef subscriptionRef $! subscription
285+ Just _ -> unsubscribe subscription
286+ return (subscription, occ)
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)
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
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))
306+ , _cacheSubscribed_nodeId :: {-# UNPACK #-} !Int
310+nowSpiderEventM :: (HasSpiderTimeline x) => EventM x (R.Event (SpiderTimeline x) ())
314+now :: (MonadIO m, Defer (Some Clear) m, HasSpiderTimeline x
317+ nowOrNot <- liftIO $ newIORef $ Just ()
318+ scheduleClear nowOrNot
319+ return . Event $ \_ -> do
320+ occ <- liftIO . readIORef $ nowOrNot
321+ return ( EventSubscription (return ()) eventSubscribedNow
325+-- | Construct an 'Event' whose value is guaranteed not to be recomputed
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
331+{-# NOINLINE [0] cacheEvent #-}
332+cacheEvent :: forall x a. HasSpiderTimeline x => Event x a -> Event x a
334+#ifdef DEBUG_TRACE_EVENTS
335+ withStackOneLine $ \callSite -> Event $
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
346+ subscribedTicket <- liftIO (readIORef mSubscribedRef >>= getFastWeakTicket) >>= \case
347+ Just subscribedTicket -> return subscribedTicket
350+ nodeId <- liftIO newNodeId
352+ subscribers <- liftIO FastWeakBag.empty
353+ occRef <- liftIO $ newIORef Nothing -- This should never be read prior to being set below
355+ (parentSub, occ) <- subscribeAndRead e $ debugSubscriber' ("cacheEvent" <> showNodeId' nodeId) $ Subscriber
357+ (parentSub, occ) <- subscribeAndRead e $ Subscriber
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
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
374+ , _cacheSubscribed_nodeId = nodeId
377+ subscribedTicket <- liftIO $ mkFastWeakTicket subscribed
378+ liftIO $ writeIORef mSubscribedRef =<< getFastWeakTicketWeak subscribedTicket
379+ return subscribedTicket
380+ liftIO $ cacheSubscription sub mSubscribedRef subscribedTicket
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
389+ let parentSub = _cacheSubscribed_parent subscribed
390+ es = EventSubscription
391+ { _eventSubscription_unsubscribe = do
392+ FastWeakBag.remove ticket
394+ isEmpty <- FastWeakBag.isEmpty $ _cacheSubscribed_subscribers subscribed
396+ writeIORef mSubscribedRef emptyFastWeak
397+ unsubscribe parentSub
399+ touch subscribedTicket
400+ , _eventSubscription_subscribed = EventSubscribed
401+ { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed parentSub
402+ , eventSubscribedRetained = toAny subscribedTicket
404+ , eventSubscribedGetParents = return [_eventSubscription_subscribed parentSub]
405+ , eventSubscribedHasOwnHeightRef = False
406+ , eventSubscribedWhoCreated = whoCreatedIORef mSubscribedRef
413+subscribe :: Event x a -> Subscriber x a -> EventM x (EventSubscription x)
414+subscribe e s = fst <$> subscribeAndRead e s
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
421+ return (EventSubscription (WeakBag.remove sln >> touch sln) es, occ)
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
426+subscribeAndReadNever :: EventM x (EventSubscription x, Maybe a)
427+subscribeAndReadNever = return (EventSubscription (return ()) eventSubscribedNever, Nothing)
429+eventNever :: Event x a
430+eventNever = Event $ const subscribeAndReadNever
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
435+eventSwitch :: HasSpiderTimeline x => Switch x a -> Event x a
436+eventSwitch !s = Event $ wrap eventSubscribedSwitch $ getSwitchSubscribed s
438+eventCoincidence :: HasSpiderTimeline x => Coincidence x a -> Event x a
439+eventCoincidence !c = Event $ wrap eventSubscribedCoincidence $ getCoincidenceSubscribed c
441+eventHold :: Hold x p -> Event x p
442+eventHold !h = Event $ subscribeHoldEvent h
444+eventDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> Event x p
445+eventDyn !j = Event $ \sub -> getDynHold j >>= \h -> subscribeHoldEvent h sub
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)
457+--------------------------------------------------------------------------------
459+--------------------------------------------------------------------------------
461+data Subscriber x a = Subscriber
462+ { subscriberPropagate :: !(a -> EventM x ())
463+ , subscriberInvalidateHeight :: !(Height -> IO ())
464+ , subscriberRecalculateHeight :: !(Height -> IO ())
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 ()
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_
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
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)
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
517+ liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
518+ scheduleClear $ coincidenceSubscribedInnerParent subscribed
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
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
538+ Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
540+ liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
541+ scheduleClear $ coincidenceSubscribedOccurrence subscribed
542+ propagate a $ coincidenceSubscribedSubscribers subscribed
543+ , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
544+ , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
547+invalidateSubscriberHeight :: Height -> Subscriber x a -> IO ()
548+invalidateSubscriberHeight = flip subscriberInvalidateHeight
550+recalculateSubscriberHeight :: Height -> Subscriber x a -> IO ()
551+recalculateSubscriberHeight = flip subscriberRecalculateHeight
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
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
567+--------------------------------------------------------------------------------
569+--------------------------------------------------------------------------------
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
579+data EventSubscribed x = EventSubscribed
580+ { eventSubscribedHeightRef :: {-# UNPACK #-} !(IORef Height)
581+ , eventSubscribedRetained :: {-# NOUNPACK #-} !Any
583+ , eventSubscribedGetParents :: !(IO [EventSubscribed x]) -- For debugging loops
584+ , eventSubscribedHasOwnHeightRef :: !Bool
585+ , eventSubscribedWhoCreated :: !(IO [String])
589+eventSubscribedRoot :: RootSubscribed x a -> EventSubscribed x
590+eventSubscribedRoot !r = EventSubscribed
591+ { eventSubscribedHeightRef = zeroRef
592+ , eventSubscribedRetained = toAny r
594+ , eventSubscribedGetParents = return []
595+ , eventSubscribedHasOwnHeightRef = False
596+ , eventSubscribedWhoCreated = return ["root"]
600+eventSubscribedNever :: EventSubscribed x
601+eventSubscribedNever = EventSubscribed
602+ { eventSubscribedHeightRef = zeroRef
603+ , eventSubscribedRetained = toAny ()
605+ , eventSubscribedGetParents = return []
606+ , eventSubscribedHasOwnHeightRef = False
607+ , eventSubscribedWhoCreated = return ["never"]
610+eventSubscribedNow :: EventSubscribed x
611+eventSubscribedNow = EventSubscribed
612+ { eventSubscribedHeightRef = zeroRef
613+ , eventSubscribedRetained = toAny ()
615+ , eventSubscribedGetParents = return []
616+ , eventSubscribedHasOwnHeightRef = False
617+ , eventSubscribedWhoCreated = return ["now"]
621+eventSubscribedFan :: FanSubscribed x k v -> EventSubscribed x
622+eventSubscribedFan !subscribed = EventSubscribed
623+ { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
624+ , eventSubscribedRetained = toAny subscribed
626+ , eventSubscribedGetParents = return [_eventSubscription_subscribed $ fanSubscribedParent subscribed]
627+ , eventSubscribedHasOwnHeightRef = False
628+ , eventSubscribedWhoCreated = whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
632+eventSubscribedSwitch :: SwitchSubscribed x a -> EventSubscribed x
633+eventSubscribedSwitch !subscribed = EventSubscribed
634+ { eventSubscribedHeightRef = switchSubscribedHeight subscribed
635+ , eventSubscribedRetained = toAny subscribed
637+ , eventSubscribedGetParents = do
638+ s <- readIORef $ switchSubscribedCurrentParent subscribed
639+ return [_eventSubscription_subscribed s]
640+ , eventSubscribedHasOwnHeightRef = True
641+ , eventSubscribedWhoCreated = whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
645+eventSubscribedCoincidence :: CoincidenceSubscribed x a -> EventSubscribed x
646+eventSubscribedCoincidence !subscribed = EventSubscribed
647+ { eventSubscribedHeightRef = coincidenceSubscribedHeight subscribed
648+ , eventSubscribedRetained = toAny subscribed
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
660+getEventSubscribedHeight :: EventSubscribed x -> IO Height
661+getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
664+whoCreatedEventSubscribed :: EventSubscribed x -> IO [String]
665+whoCreatedEventSubscribed = eventSubscribedWhoCreated
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
674+ mapM_ loop =<< liftIO (eventSubscribedGetParents s)
675+ forM_ subscribers $ \s -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
679+{-# INLINE subscribeHoldEvent #-}
680+subscribeHoldEvent :: Hold x p -> Subscriber x p -> EventM x (EventSubscription x, Maybe p)
681+subscribeHoldEvent = subscribeAndRead . holdEvent
683+--------------------------------------------------------------------------------
685+--------------------------------------------------------------------------------
687+newtype Behavior x a = Behavior { readBehaviorTracked :: BehaviorM x a }
689+behaviorHold :: Hold x p -> Behavior x (PatchTarget p)
690+behaviorHold !h = Behavior $ readHoldTracked h
692+behaviorHoldIdentity :: Hold x (Identity a) -> Behavior x a
693+behaviorHoldIdentity = behaviorHold
695+behaviorConst :: a -> Behavior x a
696+behaviorConst !a = Behavior $ return a
698+behaviorPull :: Pull x a -> Behavior x a
699+behaviorPull !p = Behavior $ do
700+ val <- liftIO $ readIORef $ pullValue p
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
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
721+ liftIO $ writeIORef (pullValue p) $ Just subscribed
722+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedPull subscribed)) :))
725+behaviorDyn :: Patch p => Dyn x p -> Behavior x (PatchTarget p)
726+behaviorDyn !d = Behavior $ readHoldTracked =<< getDynHold d
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
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
743+--------------------------------------------------------------------------------
745+--------------------------------------------------------------------------------
747+type DynamicS x p = Dynamic x (PatchTarget p) p
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`?
754+deriving instance (HasSpiderTimeline x) => Functor (Dynamic x target)
759+dynamicHold :: Hold x p -> DynamicS x p
760+dynamicHold !h = Dynamic
761+ { dynamicCurrent = behaviorHold h
762+ , dynamicUpdated = eventHold h
765+dynamicHoldIdentity :: Hold x (Identity a) -> DynamicS x (Identity a)
766+dynamicHoldIdentity = dynamicHold
768+dynamicConst :: PatchTarget p -> DynamicS x p
769+dynamicConst !a = Dynamic
770+ { dynamicCurrent = behaviorConst a
771+ , dynamicUpdated = eventNever
774+dynamicDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> DynamicS x p
775+dynamicDyn !d = Dynamic
776+ { dynamicCurrent = behaviorDyn d
777+ , dynamicUpdated = eventDyn d
780+dynamicDynIdentity :: HasSpiderTimeline x => Dyn x (Identity a) -> DynamicS x (Identity a)
781+dynamicDynIdentity = dynamicDyn
783+--------------------------------------------------------------------------------
785+--------------------------------------------------------------------------------
95−--TODO: Figure out why certain things are not 'representational', then make them representational so we can use coerce
96--type role Hold representational
787--type role Hold representational
97−data Hold a
788+data Hold x p
98− = Hold { holdValue :: !(IORef a)
789+ = Hold { holdValue :: !(IORef (PatchTarget p))
99− , holdInvalidators :: !(IORef [Weak Invalidator])
790+ , holdInvalidators :: !(IORef [Weak (Invalidator x)])
100− -- We need to use 'Any' for the next two things, because otherwise Hold inherits a nominal role for its 'a' parameter, and we want to be able to use 'coerce'
791+ , holdEvent :: Event x p -- This must be lazy, or holds cannot be defined before their input Events
101− , holdSubscriber :: !(IORef Any) -- Keeps its subscription alive; for some reason, a regular (or strict) reference to the Subscriber itself wasn't working, so had to use an IORef
102− , holdParent :: !(IORef Any) -- Keeps its parent alive (will be undefined until the hold is initialized --TODO: Probably shouldn't be an IORef
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
103#ifdef DEBUG_NODEIDS
793#ifdef DEBUG_NODEIDS
104 , holdNodeId :: Int
794 , holdNodeId :: Int
108−data EventEnv
798+-- | A statically allocated 'SpiderTimeline'
109− = EventEnv { eventEnvAssignments :: !(IORef [SomeAssignment])
799+data Global
110− , eventEnvHoldInits :: !(IORef [SomeHoldInit])
800+
111− , eventEnvClears :: !(IORef [SomeMaybeIORef])
801+{-# NOINLINE globalSpiderTimelineEnv #-}
112− , eventEnvRootClears :: !(IORef [SomeDMapIORef])
802+globalSpiderTimelineEnv :: SpiderTimelineEnv Global
113− , eventEnvCurrentHeight :: !(IORef Int)
803+globalSpiderTimelineEnv = unsafePerformIO unsafeNewSpiderTimelineEnv
114− , eventEnvCoincidenceInfos :: !(IORef [SomeCoincidenceInfo])
804+
115− , eventEnvDelayedMerges :: !(IORef (IntMap [DelayedMerge]))
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
812+data SpiderTimelineEnv' x = SpiderTimelineEnv
813+ { _spiderTimeline_lock :: {-# UNPACK #-} !(MVar ())
814+ , _spiderTimeline_eventEnv :: {-# UNPACK #-} !(EventEnv x)
816+ , _spiderTimeline_depth :: {-# UNPACK #-} !(IORef Int)
819+type role SpiderTimelineEnv' phantom
821+instance Eq (SpiderTimelineEnv x) where
822+ _ == _ = True -- Since only one exists of each type
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
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])
838+ , eventEnvCurrentHeight :: !(IORef Height) -- Needed for Subscribe
839+ , eventEnvResetCoincidences :: !(IORef [SomeResetCoincidence x]) -- Needed for Subscribe
840+ , eventEnvDelayedMerges :: !(IORef (IntMap [EventM x ()]))
118−runEventM :: EventM a -> EventEnv -> IO a
843+{-# INLINE runEventM #-}
119−runEventM = runReaderT . unEventM
844+runEventM :: EventM x a -> IO a
847+asksEventEnv :: forall x a. HasSpiderTimeline x => (EventEnv x -> a) -> EventM x a
848+asksEventEnv f = return $ f $ _spiderTimeline_eventEnv (unSTE (spiderTimeline :: SpiderTimelineEnv x))
850+class MonadIO m => Defer a m where
851+ getDeferralQueue :: m (IORef [a])
854+defer :: Defer a m => a -> m ()
856+ q <- getDeferralQueue
857+ liftIO $ modifyIORef' q (a:)
859+instance HasSpiderTimeline x => Defer (SomeAssignment x) (EventM x) where
860+ {-# INLINE getDeferralQueue #-}
861+ getDeferralQueue = asksEventEnv eventEnvAssignments
863+instance HasSpiderTimeline x => Defer (SomeHoldInit x) (EventM x) where
864+ {-# INLINE getDeferralQueue #-}
865+ getDeferralQueue = asksEventEnv eventEnvHoldInits
867+instance HasSpiderTimeline x => Defer (SomeDynInit x) (EventM x) where
868+ {-# INLINE getDeferralQueue #-}
869+ getDeferralQueue = asksEventEnv eventEnvDynInits
871+instance Defer (SomeHoldInit x) (BehaviorM x) where
872+ {-# INLINE getDeferralQueue #-}
873+ getDeferralQueue = BehaviorM $ asks snd
875+instance HasSpiderTimeline x => Defer (SomeMergeUpdate x) (EventM x) where
876+ {-# INLINE getDeferralQueue #-}
877+ getDeferralQueue = asksEventEnv eventEnvMergeUpdates
121−askToAssignRef :: EventM (IORef [SomeAssignment])
879+instance HasSpiderTimeline x => Defer (SomeMergeInit x) (EventM x) where
122−askToAssignRef = EventM $ asks eventEnvAssignments
880+ {-# INLINE getDeferralQueue #-}
881+ getDeferralQueue = asksEventEnv eventEnvMergeInits
124−askHoldInitRef :: EventM (IORef [SomeHoldInit])
883+class HasSpiderTimeline x => HasCurrentHeight x m | m -> x where
125−askHoldInitRef = EventM $ asks eventEnvHoldInits
884+ getCurrentHeight :: m Height
885+ scheduleMerge :: Height -> EventM x () -> m ()
127−getCurrentHeight :: EventM Int
887+instance HasSpiderTimeline x => HasCurrentHeight x (EventM x) where
128−getCurrentHeight = EventM $ do
888+ {-# INLINE getCurrentHeight #-}
129− heightRef <- asks eventEnvCurrentHeight
889+ getCurrentHeight = do
130− liftIO $ readIORef heightRef
890+ heightRef <- asksEventEnv eventEnvCurrentHeight
891+ liftIO $ readIORef heightRef
892+ {-# INLINE scheduleMerge #-}
893+ scheduleMerge height subscribed = do
894+ delayedRef <- asksEventEnv eventEnvDelayedMerges
895+ liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) (unHeight height) [subscribed]
132−putCurrentHeight :: Int -> EventM ()
897+class HasSpiderTimeline x where
133−putCurrentHeight h = EventM $ do
898+ -- | Retrieve the current SpiderTimelineEnv
134− heightRef <- asks eventEnvCurrentHeight
899+ spiderTimeline :: SpiderTimelineEnv x
135− liftIO $ writeIORef heightRef h
137−scheduleClear :: IORef (Maybe a) -> EventM ()
901+instance HasSpiderTimeline Global where
138−scheduleClear r = EventM $ do
902+ spiderTimeline = globalSpiderTimelineEnv
139− clears <- asks eventEnvClears
140− liftIO $ modifyIORef' clears (SomeMaybeIORef r :)
142−scheduleRootClear :: IORef (DMap k Identity) -> EventM ()
904+putCurrentHeight :: HasSpiderTimeline x => Height -> EventM x ()
143−scheduleRootClear r = EventM $ do
905+putCurrentHeight h = do
144− clears <- asks eventEnvRootClears
906+ heightRef <- asksEventEnv eventEnvCurrentHeight
145− liftIO $ modifyIORef' clears (SomeDMapIORef r :)
907+ liftIO $ writeIORef heightRef $! h
147−scheduleMerge :: Int -> MergeSubscribed a -> EventM ()
909+instance HasSpiderTimeline x => Defer (Some Clear) (EventM x) where
148−scheduleMerge height subscribed = EventM $ do
910+ {-# INLINE getDeferralQueue #-}
149− delayedRef <- asks eventEnvDelayedMerges
911+ getDeferralQueue = asksEventEnv eventEnvClears
150− liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) height [DelayedMerge subscribed]
152−emitCoincidenceInfo :: SomeCoincidenceInfo -> EventM ()
913+{-# INLINE scheduleClear #-}
153−emitCoincidenceInfo sci = EventM $ do
914+scheduleClear :: Defer (Some Clear) m => IORef (Maybe a) -> m ()
154− ciRef <- asks eventEnvCoincidenceInfos
915+scheduleClear r = defer $ Some $ Clear r
155− liftIO $ modifyIORef' ciRef (sci:)
916+
917+instance HasSpiderTimeline x => Defer (Some IntClear) (EventM x) where
918+ {-# INLINE getDeferralQueue #-}
919+ getDeferralQueue = asksEventEnv eventEnvIntClears
921+{-# INLINE scheduleIntClear #-}
922+scheduleIntClear :: Defer (Some IntClear) m => IORef (IntMap a) -> m ()
923+scheduleIntClear r = defer $ Some $ IntClear r
925+instance HasSpiderTimeline x => Defer (Some RootClear) (EventM x) where
926+ {-# INLINE getDeferralQueue #-}
927+ getDeferralQueue = asksEventEnv eventEnvRootClears
929+{-# INLINE scheduleRootClear #-}
930+scheduleRootClear :: Defer (Some RootClear) m => IORef (DMap k Identity) -> m ()
931+scheduleRootClear r = defer $ Some $ RootClear r
933+instance HasSpiderTimeline x => Defer (SomeResetCoincidence x) (EventM x) where
934+ {-# INLINE getDeferralQueue #-}
935+ getDeferralQueue = asksEventEnv eventEnvResetCoincidences
157-- Note: hold cannot examine its event until after the phase is over
937-- Note: hold cannot examine its event until after the phase is over
158−hold :: a -> Event a -> EventM (Behavior a)
938+{-# INLINE [1] hold #-}
939+hold :: (Patch p, Defer (SomeHoldInit x) m) => PatchTarget p -> Event x p -> m (Hold x p)
159hold v0 e = do
940hold v0 e = do
160− holdInitRef <- askHoldInitRef
941+ valRef <- liftIO $ newIORef v0
161− liftIO $ do
942+ invsRef <- liftIO $ newIORef []
162− valRef <- newIORef v0
943+ parentRef <- liftIO $ newIORef Nothing
163− invsRef <- newIORef []
164− parentRef <- newIORef $ error "hold not yet initialized (parent)"
165− subscriberRef <- newIORef $ error "hold not yet initialized (subscriber)"
167− { holdValue = valRef
168− , holdInvalidators = invsRef
169− , holdSubscriber = subscriberRef
170− , holdParent = parentRef
171#ifdef DEBUG_NODEIDS
944#ifdef DEBUG_NODEIDS
172− , holdNodeId = unsafeNodeId (v0, e)
945+ nodeId <- liftIO newNodeId
175− s <- newSubscriberHold h
948+ { holdValue = valRef
176− writeIORef subscriberRef $ unsafeCoerce s
949+ , holdInvalidators = invsRef
177− modifyIORef' holdInitRef (SomeHoldInit e h :)
950+ , holdEvent = e
178− return $ BehaviorHold h
951+ , holdParent = parentRef
179−
952+#ifdef DEBUG_NODEIDS
180−subscribeHold :: Event a -> Hold a -> EventM ()
953+ , holdNodeId = nodeId
181−subscribeHold e h = do
954+#endif
182− toAssignRef <- askToAssignRef
955+ }
183− !s <- liftIO $ liftM unsafeCoerce $ readIORef $ holdSubscriber h -- This must be performed strictly so that the weak pointer points at the actual item
956+ defer $ SomeHoldInit h
184− ws <- liftIO $ mkWeakPtrWithDebug s "holdSubscriber"
957+ return h
185− subd <- subscribe e $ WeakSubscriberSimple ws
958+
186− liftIO $ writeIORef (holdParent h) $ unsafeCoerce subd
959+{-# INLINE getHoldEventSubscription #-}
187− occ <- liftIO $ getEventSubscribedOcc subd
960+getHoldEventSubscription :: forall p x. (HasSpiderTimeline x, Patch p) => Hold x p -> EventM x (EventSubscription x)
188− case occ of
961+getHoldEventSubscription h = do
189− Nothing -> return ()
962+ ep <- liftIO $ readIORef $ holdParent h
190− Just o -> liftIO $ modifyIORef' toAssignRef (SomeAssignment h o :)
963+ case ep of
964+ Just subd -> return subd
967+ subscriptionRef <- liftIO $ newIORef $ error "getHoldEventSubscription: subdRef uninitialized"
968+ (subscription@(EventSubscription _ _), occ) <- subscribeAndRead e =<< liftIO (newSubscriberHold h)
969+ liftIO $ writeIORef subscriptionRef $! subscription
971+ Nothing -> return ()
973+ old <- liftIO $ readIORef $ holdValue h
975+ Nothing -> return ()
977+ -- Need to evaluate these so that we don't retain the Hold itself
978+ v <- liftIO $ evaluate $ holdValue h
979+ i <- liftIO $ evaluate $ holdInvalidators h
980+ defer $ SomeAssignment v i new
981+ liftIO $ writeIORef (holdParent h) $ Just subscription
984+type BehaviorEnv x = (Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]), IORef [SomeHoldInit x])
192−--type role BehaviorM representational
193-- BehaviorM can sample behaviors
986-- BehaviorM can sample behaviors
194−newtype BehaviorM a = BehaviorM { unBehaviorM :: ReaderT (Maybe (Weak Invalidator, IORef [SomeBehaviorSubscribed])) IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
987+newtype BehaviorM x a = BehaviorM { unBehaviorM :: ReaderIO (BehaviorEnv x) a }
988+ deriving (Functor, Applicative, MonadIO, MonadFix, MonadReader (BehaviorEnv x))
990+instance Monad (BehaviorM x) where
991+ {-# INLINE (>>=) #-}
992+ BehaviorM x >>= f = BehaviorM $ x >>= unBehaviorM . f
994+ BehaviorM x >> BehaviorM y = BehaviorM $ x >> y
995+ {-# INLINE return #-}
996+ return x = BehaviorM $ return x
997+#if !MIN_VERSION_base(4,13,0)
999+ fail s = BehaviorM $ fail s
196−data BehaviorSubscribed a
1002+data BehaviorSubscribed x a
197− = BehaviorSubscribedHold (Hold a)
1003+ = forall p. BehaviorSubscribedHold (Hold x p)
198− | BehaviorSubscribedPull (PullSubscribed a)
1004+ | BehaviorSubscribedPull (PullSubscribed x a)
200−data SomeBehaviorSubscribed = forall a. SomeBehaviorSubscribed (BehaviorSubscribed a)
1006+newtype SomeBehaviorSubscribed x = SomeBehaviorSubscribed (Some (BehaviorSubscribed x))
202--type role PullSubscribed representational
1008--type role PullSubscribed representational
203−data PullSubscribed a
1009+data PullSubscribed x a
204 = PullSubscribed { pullSubscribedValue :: !a
1010 = PullSubscribed { pullSubscribedValue :: !a
205− , pullSubscribedInvalidators :: !(IORef [Weak Invalidator])
1011+ , pullSubscribedInvalidators :: !(IORef [Weak (Invalidator x)])
206− , pullSubscribedOwnInvalidator :: !Invalidator
1012+ , pullSubscribedOwnInvalidator :: !(Invalidator x)
207− , pullSubscribedParents :: ![SomeBehaviorSubscribed] -- Need to keep parent behaviors alive, or they won't let us know when they're invalidated
1013+ , pullSubscribedParents :: ![SomeBehaviorSubscribed x] -- Need to keep parent behaviors alive, or they won't let us know when they're invalidated
210−--type role Pull representational
1016+--type role Pull representational
211−data Pull a
1017+data Pull x a
212− = Pull { pullValue :: !(IORef (Maybe (PullSubscribed a)))
1018+ = Pull { pullValue :: !(IORef (Maybe (PullSubscribed x a)))
213− , pullCompute :: !(BehaviorM a)
1019+ , pullCompute :: !(BehaviorM x a)
214− }
1020+#ifdef DEBUG_NODEIDS
1021+ , pullNodeId :: Int
1026+ = forall a. InvalidatorPull (Pull x a)
1027+ | forall a. InvalidatorSwitch (SwitchSubscribed x a)
1029+data RootSubscribed x a = forall k. GCompare k => RootSubscribed
1030+ { rootSubscribedKey :: !(k a)
1031+ , rootSubscribedCachedSubscribed :: !(IORef (DMap k (RootSubscribed x))) -- From the original Root
1032+ , rootSubscribedSubscribers :: !(WeakBag (Subscriber x a))
1033+ , rootSubscribedOccurrence :: !(IO (Maybe a)) -- Lookup from rootOccurrence
1034+ , rootSubscribedUninit :: IO ()
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?
1036+#ifdef DEBUG_NODEIDS
1037+ , rootSubscribedNodeId :: Int
1042+ = Root { rootOccurrence :: !(IORef (DMap k Identity)) -- The currently-firing occurrence of this event
1043+ , rootSubscribed :: !(IORef (DMap k (RootSubscribed x)))
1044+ , rootInit :: !(forall a. k a -> RootTrigger x a -> IO (IO ()))
1047+data SomeHoldInit x = forall p. Patch p => SomeHoldInit !(Hold x p)
1049+data SomeDynInit x = forall p. Patch p => SomeDynInit !(Dyn x p)
1051+data SomeMergeUpdate x = SomeMergeUpdate
1052+ { _someMergeUpdate_update :: !(EventM x [EventSubscription x])
1053+ , _someMergeUpdate_invalidateHeight :: !(IO ())
1054+ , _someMergeUpdate_recalculateHeight :: !(IO ())
1057+newtype SomeMergeInit x = SomeMergeInit { unSomeMergeInit :: EventM x () }
1059+-- EventM can do everything BehaviorM can, plus create holds
1060+newtype EventM x a = EventM { unEventM :: IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException)
1062+newtype MergeSubscribedParent x a = MergeSubscribedParent { unMergeSubscribedParent :: EventSubscription x }
1064+data MergeSubscribedParentWithMove x k a = MergeSubscribedParentWithMove
1065+ { _mergeSubscribedParentWithMove_subscription :: !(EventSubscription x)
1066+ , _mergeSubscribedParentWithMove_key :: !(IORef (k a))
1069+data HeightBag = HeightBag
1070+ { _heightBag_size :: {-# UNPACK #-} !Int
1071+ , _heightBag_contents :: !(IntMap Word) -- Number of excess in each bucket
1073+ deriving (Show, Read, Eq, Ord)
1075+heightBagEmpty :: HeightBag
1076+heightBagEmpty = heightBagVerify $ HeightBag 0 IntMap.empty
1078+heightBagSize :: HeightBag -> Int
1079+heightBagSize = _heightBag_size
216−data Invalidator
1081+heightBagFromList :: [Height] -> HeightBag
217− = forall a. InvalidatorPull (Pull a)
1082+heightBagFromList heights = heightBagVerify $ foldl' (flip heightBagAdd) heightBagEmpty heights
218− | forall a. InvalidatorSwitch (SwitchSubscribed a)
220−data RootSubscribed a
1084+heightBagAdd :: Height -> HeightBag -> HeightBag
221− = RootSubscribed { rootSubscribedSubscribers :: !(IORef [WeakSubscriber a])
1085+heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $
222− , rootSubscribedOccurrence :: !(IO (Maybe a)) -- Lookup from rootOccurrence
1086+ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
225−data Root (k :: * -> *)
1088+heightBagRemove :: Height -> HeightBag -> HeightBag
226− = Root { rootOccurrence :: !(IORef (DMap k Identity)) -- The currently-firing occurrence of this event
1089+heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.lookup h c of
227− , rootSubscribed :: !(IORef (DMap k RootSubscribed))
1090+ Nothing -> error $ "heightBagRemove: Height " <> show h <> " not present in bag " <> show b
228− , rootInit :: !(forall a. k a -> RootTrigger a -> IO (IO ()))
1091+ Just old -> HeightBag (pred s) $ case old of
229− }
1092+ 0 -> IntMap.delete h c
1093+ _ -> IntMap.insert h (pred old) c
231−data SomeHoldInit = forall a. SomeHoldInit (Event a) (Hold a)
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
233−-- EventM can do everything BehaviorM can, plus create holds
234−newtype EventM a = EventM { unEventM :: ReaderT EventEnv IO a } deriving (Functor, Applicative, Monad, MonadFix, MonadIO, MonadException, MonadAsyncException) -- The environment should be Nothing if we are not in a frame, and Just if we are - in which case it is a list of assignments to be done after the frame is over
236−data PushSubscribed a b
237− = PushSubscribed { pushSubscribedOccurrence :: !(IORef (Maybe b)) -- If the current height is less than our height, this should always be Nothing; during our height, this will get filled in at some point, always before our children are notified; after our height, this will be filled in with the correct value (Nothing if we are not firing, Just if we are)
238− , pushSubscribedHeight :: !(IORef Int)
239− , pushSubscribedSubscribers :: !(IORef [WeakSubscriber b])
240− , pushSubscribedSelf :: !(Subscriber a) -- Hold this in memory to ensure our WeakReferences don't die
241− , pushSubscribedParent :: !(EventSubscribed a)
243− , pushSubscribedNodeId :: Int
247−data Push a b
1102+heightBagMax :: HeightBag -> Height
248− = Push { pushCompute :: !(a -> EventM (Maybe b)) -- Compute the current firing value; assumes that its parent has been computed
1103+heightBagMax (HeightBag _ c) = case IntMap.maxViewWithKey c of
249− , pushParent :: !(Event a)
1104+ Just ((h, _), _) -> Height h
250− , pushSubscribed :: !(IORef (Maybe (PushSubscribed a b))) --TODO: Can we replace this with an unsafePerformIO thunk?
1105+ Nothing -> zeroHeight
253−data MergeSubscribed k
1107+heightBagVerify :: HeightBag -> HeightBag
254− = MergeSubscribed { mergeSubscribedOccurrence :: !(IORef (Maybe (DMap k Identity)))
1108+#ifdef DEBUG
255− , mergeSubscribedAccum :: !(IORef (DMap k Identity)) -- This will accumulate occurrences until our height is reached, at which point it will be transferred to mergeSubscribedOccurrence
1109+heightBagVerify b@(HeightBag s c) = if
256− , mergeSubscribedHeight :: !(IORef Int)
1110+ | s /= IntMap.size c + fromIntegral (sum (IntMap.elems c))
257− , mergeSubscribedSubscribers :: !(IORef [WeakSubscriber (DMap k Identity)])
1111+ -> error $ "heightBagVerify: size doesn't match: " <> show b
258− , mergeSubscribedSelf :: !Any -- Hold all our Subscribers in memory
1112+ | unHeight invalidHeight `IntMap.member` c
259− , mergeSubscribedParents :: !(DMap k EventSubscribed)
1113+ -> error $ "heightBagVerify: contains invalid height: " <> show b
260−#ifdef DEBUG_NODEIDS
1114+ | otherwise -> b
261− , mergeSubscribedNodeId :: Int
1115+#else
1116+heightBagVerify = id
265−--TODO: DMap sucks; we should really write something better (with a functor for the value as well as the key)
1119+data FanSubscribedChildren x k v a = FanSubscribedChildren
266−data Merge k
1120+ { _fanSubscribedChildren_list :: !(WeakBag (Subscriber x (v a)))
267− = Merge { mergeParents :: !(DMap k Event)
1121+ , _fanSubscribedChildren_self :: {-# NOUNPACK #-} !(k a, FanSubscribed x k v)
268− , mergeSubscribed :: !(IORef (Maybe (MergeSubscribed k))) --TODO: Can we replace this with an unsafePerformIO thunk?
1122+ , _fanSubscribedChildren_weakSelf :: !(IORef (Weak (k a, FanSubscribed x k v)))
271−data FanSubscriberKey k a where
1125+data FanSubscribed x k v
272− FanSubscriberKey :: k a -> FanSubscriberKey k [WeakSubscriber a]
1126+ = FanSubscribed { fanSubscribedCachedSubscribed :: !(IORef (Maybe (FanSubscribed x k v)))
273−
1127+ , fanSubscribedOccurrence :: !(IORef (Maybe (DMap k v)))
274−instance GEq k => GEq (FanSubscriberKey k) where
1128+ , fanSubscribedSubscribers :: !(IORef (DMap k (FanSubscribedChildren x k v))) -- This DMap should never be empty
275− geq (FanSubscriberKey a) (FanSubscriberKey b) = case geq a b of
1129+ , fanSubscribedParent :: !(EventSubscription x)
277− Just Refl -> Just Refl
279−instance GCompare k => GCompare (FanSubscriberKey k) where
280− gcompare (FanSubscriberKey a) (FanSubscriberKey b) = case gcompare a b of
286− = FanSubscribed { fanSubscribedSubscribers :: !(IORef (DMap (FanSubscriberKey k) Identity))
287− , fanSubscribedParent :: !(EventSubscribed (DMap k Identity))
288− , fanSubscribedSelf :: {-# NOUNPACK #-} (Subscriber (DMap k Identity))
289#ifdef DEBUG_NODEIDS
1130#ifdef DEBUG_NODEIDS
290 , fanSubscribedNodeId :: Int
1131 , fanSubscribedNodeId :: Int
294−data Fan k
1135+data Fan x k v
295− = Fan { fanParent :: !(Event (DMap k Identity))
1136+ = Fan { fanParent :: !(Event x (DMap k v))
296− , fanSubscribed :: !(IORef (Maybe (FanSubscribed k)))
1137+ , fanSubscribed :: !(IORef (Maybe (FanSubscribed x k v)))
299−data SwitchSubscribed a
1140+data SwitchSubscribed x a
300− = SwitchSubscribed { switchSubscribedOccurrence :: !(IORef (Maybe a))
1141+ = SwitchSubscribed { switchSubscribedCachedSubscribed :: !(IORef (Maybe (SwitchSubscribed x a)))
301− , switchSubscribedHeight :: !(IORef Int)
1142+ , switchSubscribedOccurrence :: !(IORef (Maybe a))
302− , switchSubscribedSubscribers :: !(IORef [WeakSubscriber a])
1143+ , switchSubscribedHeight :: !(IORef Height)
303− , switchSubscribedSelf :: {-# NOUNPACK #-} (Subscriber a)
1144+ , switchSubscribedSubscribers :: !(WeakBag (Subscriber x a))
304− , switchSubscribedSelfWeak :: !(IORef (Weak (Subscriber a)))
1145+ , switchSubscribedOwnInvalidator :: {-# NOUNPACK #-} !(Invalidator x)
305− , switchSubscribedOwnInvalidator :: {-# NOUNPACK #-} Invalidator
1146+ , switchSubscribedOwnWeakInvalidator :: !(IORef (Weak (Invalidator x)))
306− , switchSubscribedOwnWeakInvalidator :: !(IORef (Weak Invalidator))
1147+ , switchSubscribedBehaviorParents :: !(IORef [SomeBehaviorSubscribed x])
307− , switchSubscribedBehaviorParents :: !(IORef [SomeBehaviorSubscribed])
1148+ , switchSubscribedParent :: !(Behavior x (Event x a))
308− , switchSubscribedParent :: !(Behavior (Event a))
1149+ , switchSubscribedCurrentParent :: !(IORef (EventSubscription x))
309− , switchSubscribedCurrentParent :: !(IORef (EventSubscribed a))
1150+ , switchSubscribedWeakSelf :: !(IORef (Weak (SwitchSubscribed x a)))
310#ifdef DEBUG_NODEIDS
1151#ifdef DEBUG_NODEIDS
311 , switchSubscribedNodeId :: Int
1152 , switchSubscribedNodeId :: Int
315−data Switch a
1156+data Switch x a
316− = Switch { switchParent :: !(Behavior (Event a))
1157+ = Switch { switchParent :: !(Behavior x (Event x a))
317− , switchSubscribed :: !(IORef (Maybe (SwitchSubscribed a)))
1158+ , switchSubscribed :: !(IORef (Maybe (SwitchSubscribed x a)))
320−data CoincidenceSubscribed a
1161+#ifdef USE_TEMPLATE_HASKELL
321− = CoincidenceSubscribed { coincidenceSubscribedOccurrence :: !(IORef (Maybe a))
1162+{-# ANN CoincidenceSubscribed "HLint: ignore Redundant bracket" #-}
322− , coincidenceSubscribedSubscribers :: !(IORef [WeakSubscriber a])
1163+#endif
323− , coincidenceSubscribedHeight :: !(IORef Int)
1164+data CoincidenceSubscribed x a
324− , coincidenceSubscribedOuter :: {-# NOUNPACK #-} (Subscriber (Event a))
1165+ = CoincidenceSubscribed { coincidenceSubscribedCachedSubscribed :: !(IORef (Maybe (CoincidenceSubscribed x a)))
325− , coincidenceSubscribedOuterParent :: !(EventSubscribed (Event a))
1166+ , coincidenceSubscribedOccurrence :: !(IORef (Maybe a))
326− , coincidenceSubscribedInnerParent :: !(IORef (Maybe (EventSubscribed a)))
1167+ , coincidenceSubscribedSubscribers :: !(WeakBag (Subscriber x a))
1168+ , coincidenceSubscribedHeight :: !(IORef Height)
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)))
327#ifdef DEBUG_NODEIDS
1173#ifdef DEBUG_NODEIDS
328 , coincidenceSubscribedNodeId :: Int
1174 , coincidenceSubscribedNodeId :: Int
332−data Coincidence a
1178+data Coincidence x a
333− = Coincidence { coincidenceParent :: !(Event (Event a))
1179+ = Coincidence { coincidenceParent :: !(Event x (Event x a))
334− , coincidenceSubscribed :: !(IORef (Maybe (CoincidenceSubscribed a)))
1180+ , coincidenceSubscribed :: !(IORef (Maybe (CoincidenceSubscribed x a)))
337−data Box a = Box { unBox :: a }
339−--type WeakSubscriber a = Weak (Subscriber a)
340−data WeakSubscriber a
341− = forall k. GCompare k => WeakSubscriberMerge !(k a) !(Weak (Box (MergeSubscribed k))) --TODO: Can we inline the GCompare?
342− | WeakSubscriberSimple !(Weak (Subscriber a))
344−showWeakSubscriberType :: WeakSubscriber a -> String
345−showWeakSubscriberType = \case
346− WeakSubscriberMerge _ _ -> "WeakSubscriberMerge"
347− WeakSubscriberSimple _ -> "WeakSubscriberSimple"
349−deRefWeakSubscriber :: WeakSubscriber a -> IO (Maybe (Subscriber a))
350−deRefWeakSubscriber ws = case ws of
351− WeakSubscriberSimple w -> deRefWeak w
352− WeakSubscriberMerge k w -> liftM (fmap $ SubscriberMerge k . unBox) $ deRefWeak w
355− = forall b. SubscriberPush !(a -> EventM (Maybe b)) (PushSubscribed a b)
356− | forall k. GCompare k => SubscriberMerge !(k a) (MergeSubscribed k) --TODO: Can we inline the GCompare?
357− | forall k. (GCompare k, a ~ DMap k Identity) => SubscriberFan (FanSubscribed k)
358− | SubscriberHold !(Hold a)
359− | SubscriberSwitch (SwitchSubscribed a)
360− | forall b. a ~ Event b => SubscriberCoincidenceOuter (CoincidenceSubscribed b)
361− | SubscriberCoincidenceInner (CoincidenceSubscribed a)
363−showSubscriberType :: Subscriber a -> String
364−showSubscriberType = \case
365− SubscriberPush _ _ -> "SubscriberPush"
366− SubscriberMerge _ _ -> "SubscriberMerge"
367− SubscriberFan _ -> "SubscriberFan"
368− SubscriberHold _ -> "SubscriberHold"
369− SubscriberSwitch _ -> "SubscriberSwitch"
370− SubscriberCoincidenceOuter _ -> "SubscriberCoincidenceOuter"
371− SubscriberCoincidenceInner _ -> "SubscriberCoincidenceInner"
374− = forall k. GCompare k => EventRoot !(k a) !(Root k)
376− | forall b. EventPush !(Push b a)
377− | forall k. (GCompare k, a ~ DMap k Identity) => EventMerge !(Merge k)
378− | forall k. GCompare k => EventFan !(k a) !(Fan k)
379− | EventSwitch !(Switch a)
380− | EventCoincidence !(Coincidence a)
382−showEventType :: Event a -> String
383−showEventType = \case
384− EventRoot _ _ -> "EventRoot"
385− EventNever -> "EventNever"
386− EventPush _ -> "EventPush"
387− EventMerge _ -> "EventMerge"
388− EventFan _ _ -> "EventFan"
389− EventSwitch _ -> "EventSwitch"
390− EventCoincidence _ -> "EventCoincidence"
392−data EventSubscribed a
393− = EventSubscribedRoot {-# NOUNPACK #-} (RootSubscribed a)
394− | EventSubscribedNever
395− | forall b. EventSubscribedPush !(PushSubscribed b a)
396− | forall k. (GCompare k, a ~ DMap k Identity) => EventSubscribedMerge !(MergeSubscribed k)
397− | forall k. GCompare k => EventSubscribedFan !(k a) !(FanSubscribed k)
398− | EventSubscribedSwitch !(SwitchSubscribed a)
399− | EventSubscribedCoincidence !(CoincidenceSubscribed a)
401−-- These function are constructor functions that are marked NOINLINE so they are
402−-- opaque to GHC. If we do not do this, then GHC will sometimes fuse the constructor away
403−-- so any weak references that are attached to the constructors will have their
404−-- finalizer run. Using the opaque constructor, does not see the
405−-- constructor application, so it behaves like an IORef and cannot be fused away.
407−-- The result is also evaluated to WHNF, since forcing a thunk invalidates
408−-- the weak pointer to it in some cases.
410−{-# NOINLINE newRootSubscribed #-}
411−newRootSubscribed :: IO (Maybe a) -> IORef [WeakSubscriber a] -> IO (RootSubscribed a)
412−newRootSubscribed occ subs =
413− return $! RootSubscribed
414− { rootSubscribedOccurrence = occ
415− , rootSubscribedSubscribers = subs
418−{-# NOINLINE newSubscriberPush #-}
419−newSubscriberPush :: (a -> EventM (Maybe b)) -> PushSubscribed a b -> IO (Subscriber a)
420−newSubscriberPush compute subd = return $! SubscriberPush compute subd
422−{-# NOINLINE newSubscriberHold #-}
423−newSubscriberHold :: Hold a -> IO (Subscriber a)
424−newSubscriberHold h = return $! SubscriberHold h
426−{-# NOINLINE newSubscriberFan #-}
427−newSubscriberFan :: GCompare k => FanSubscribed k -> IO (Subscriber (DMap k Identity))
428−newSubscriberFan subd = return $! SubscriberFan subd
430−{-# NOINLINE newSubscriberSwitch #-}
431−newSubscriberSwitch :: SwitchSubscribed a -> IO (Subscriber a)
432−newSubscriberSwitch subd = return $! SubscriberSwitch subd
434−{-# NOINLINE newSubscriberCoincidenceOuter #-}
435−newSubscriberCoincidenceOuter :: CoincidenceSubscribed b -> IO (Subscriber (Event b))
436−newSubscriberCoincidenceOuter subd = return $! SubscriberCoincidenceOuter subd
438−{-# NOINLINE newSubscriberCoincidenceInner #-}
439−newSubscriberCoincidenceInner :: CoincidenceSubscribed a -> IO (Subscriber a)
440−newSubscriberCoincidenceInner subd = return $! SubscriberCoincidenceInner subd
442{-# NOINLINE newInvalidatorSwitch #-}
1183{-# NOINLINE newInvalidatorSwitch #-}
443−newInvalidatorSwitch :: SwitchSubscribed a -> IO Invalidator
1184+newInvalidatorSwitch :: SwitchSubscribed x a -> IO (Invalidator x)
444newInvalidatorSwitch subd = return $! InvalidatorSwitch subd
1185newInvalidatorSwitch subd = return $! InvalidatorSwitch subd
446{-# NOINLINE newInvalidatorPull #-}
1187{-# NOINLINE newInvalidatorPull #-}
447−newInvalidatorPull :: Pull a -> IO Invalidator
1188+newInvalidatorPull :: Pull x a -> IO (Invalidator x)
448newInvalidatorPull p = return $! InvalidatorPull p
1189newInvalidatorPull p = return $! InvalidatorPull p
450−{-# NOINLINE newBox #-}
1191+instance HasSpiderTimeline x => Filterable (Event x) where
451−newBox :: a -> IO (Box a)
1192+ mapMaybe f = push $ return . f
452−newBox a = return $! Box a
1193+
1194+instance HasSpiderTimeline x => Align (Event x) where
1196+#if MIN_VERSION_these(0, 8, 0)
1197+instance HasSpiderTimeline x => Semialign (Event x) where
1199+ align ea eb = mapMaybe dmapToThese $ mergeG coerce $ dynamicConst $
1200+ DMap.fromDistinctAscList [LeftTag :=> ea, RightTag :=> eb]
1202+#ifdef MIN_VERSION_semialign
1203+#if MIN_VERSION_semialign(1,1,0)
1204+instance HasSpiderTimeline x => Zip (Event x) where
1206+ zip x y = mapMaybe justThese $ align x y
454−--type role Behavior representational
1209+data DynType x p = UnsafeDyn !(BehaviorM x (PatchTarget p), Event x p)
455−data Behavior a
1210+ | BuildDyn !(EventM x (PatchTarget p), Event x p)
456− = BehaviorHold !(Hold a)
1211+ | HoldDyn !(Hold x p)
457− | BehaviorConst !a
1212+
458− | BehaviorPull !(Pull a)
1213+newtype Dyn (x :: Type) p = Dyn { unDyn :: IORef (DynType x p) }
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)
1218+--TODO: Avoid the duplication between this and R.zipDynWith
1219+zipDynWith :: HasSpiderTimeline x => (a -> b -> c) -> DynamicS x (Identity a) -> DynamicS x (Identity b) -> DynamicS x (Identity c)
1220+zipDynWith f da db =
1221+ let eab = align (dynamicUpdated da) (dynamicUpdated db)
1222+ ec = flip push eab $ \o -> do
1223+ (a, b) <- case o of
1224+ This (Identity a) -> do
1225+ b <- readBehaviorUntracked $ dynamicCurrent db
1227+ That (Identity b) -> do
1228+ a <- readBehaviorUntracked $ dynamicCurrent da
1230+ These (Identity a) (Identity b) -> return (a, b)
1231+ return $ Just $ Identity $ f a b
1232+ in dynamicDynIdentity $ unsafeBuildDynamic (f <$> readBehaviorUntracked (dynamicCurrent da) <*> readBehaviorUntracked (dynamicCurrent db)) ec
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
1241+unsafeBuildDynamic :: BehaviorM x (PatchTarget p) -> Event x p -> Dyn x p
1242+unsafeBuildDynamic readV0 v' =
1243+ Dyn $ unsafePerformIO $ newIORef $ UnsafeDyn (readV0, v')
460-- ResultM can read behaviors and events
1245-- ResultM can read behaviors and events
461type ResultM = EventM
1246type ResultM = EventM
463−{-# NOINLINE unsafeNewIORef #-}
1248+instance HasSpiderTimeline x => Functor (Event x) where
464−unsafeNewIORef :: a -> b -> IORef b
465−unsafeNewIORef _ b = unsafePerformIO $ newIORef b
467−instance Functor Event where
468 fmap f = push $ return . Just . f
1249 fmap f = push $ return . Just . f
470−instance Functor Behavior where
1251+instance Functor (Behavior x) where
471− fmap f = pull . liftM f . readBehaviorTracked
1252+ fmap f = pull . fmap f . readBehaviorTracked
473−{-# NOINLINE push #-} --TODO: If this is helpful, we can get rid of the unsafeNewIORef and use unsafePerformIO directly
1254+{-# INLINE push #-}
474−push :: (a -> EventM (Maybe b)) -> Event a -> Event b
1255+push :: HasSpiderTimeline x => (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
475−push f e = EventPush $ Push
1256+push f e = cacheEvent (pushCheap f e)
478− , pushSubscribed = unsafeNewIORef (f, e) Nothing --TODO: Does the use of the tuple here create unnecessary overhead?
480−{-# RULES "push/push" forall f g e. push f (push g e) = push (maybe (return Nothing) f <=< g) e #-}
482−{-# NOINLINE pull #-}
483−pull :: BehaviorM a -> Behavior a
484−pull a = BehaviorPull $ Pull
486− , pullValue = unsafeNewIORef a Nothing
488−{-# RULES "pull/pull" forall a. pull (readBehaviorTracked (pull a)) = pull a #-}
490−{-# NOINLINE switch #-}
491−switch :: Behavior (Event a) -> Event a
492−switch a = EventSwitch $ Switch
494− , switchSubscribed = unsafeNewIORef a Nothing
496−{-# RULES "switch/constB" forall e. switch (BehaviorConst e) = e #-}
498−coincidence :: Event (Event a) -> Event a
1258+{-# INLINABLE pull #-}
499−coincidence a = EventCoincidence $ Coincidence
1259+pull :: BehaviorM x a -> Behavior x a
500− { coincidenceParent = a
1260+pull a = unsafePerformIO $ do
501− , coincidenceSubscribed = unsafeNewIORef a Nothing
1261+ ref <- newIORef Nothing
502− }
1262+#ifdef DEBUG_NODEIDS
1265+ pure $ behaviorPull $ Pull
1268+#ifdef DEBUG_NODEIDS
504−newRoot :: IO (Root k)
1273+{-# INLINABLE switch #-}
505−newRoot = do
1274+switch :: HasSpiderTimeline x => Behavior x (Event x a) -> Event x a
506− occRef <- newIORef DMap.empty
1275+switch a = unsafePerformIO $ do
507− subscribedRef <- newIORef DMap.empty
1276+ ref <- newIORef Nothing
508− return $ Root
1277+ pure $ eventSwitch $ Switch
509− { rootOccurrence = occRef
1278+ { switchParent = a
510− , rootSubscribed = subscribedRef
1279+ , switchSubscribed = ref
511− , rootInit = \_ _ -> return $ return ()
514−propagateAndUpdateSubscribersRef :: IORef [WeakSubscriber a] -> a -> EventM ()
1282+coincidence :: HasSpiderTimeline x => Event x (Event x a) -> Event x a
515−propagateAndUpdateSubscribersRef subscribersRef a = do
1283+coincidence a = unsafePerformIO $ do
516− subscribers <- liftIO $ readIORef subscribersRef
1284+ ref <- newIORef Nothing
517− liftIO $ writeIORef subscribersRef []
1285+ pure $ eventCoincidence $ Coincidence
518− stillAlive <- propagate a subscribers
1286+ { coincidenceParent = a
519− liftIO $ modifyIORef' subscribersRef (++stillAlive)
1287+ , coincidenceSubscribed = ref
521-- Propagate the given event occurrence; before cleaning up, run the given action, which may read the state of events and behaviors
1290-- Propagate the given event occurrence; before cleaning up, run the given action, which may read the state of events and behaviors
522−run :: [DSum RootTrigger Identity] -> ResultM b -> IO b
1291+run :: forall x b. HasSpiderTimeline x => [DSum (RootTrigger x) Identity] -> ResultM x b -> SpiderHost x b
523run roots after = do
1292run roots after = do
524− when debugPropagate $ putStrLn "Running an event frame"
1293+ tracePropagate (Proxy :: Proxy x) $ "Running an event frame with " <> show (length roots) <> " events"
525− result <- runFrame $ do
1294+ let t = spiderTimeline :: SpiderTimelineEnv x
1295+ result <- SpiderHost $ withMVar (_spiderTimeline_lock (unSTE t)) $ \_ -> unSpiderHost $ runFrame $ do
526 rootsToPropagate <- forM roots $ \r@(RootTrigger (_, occRef, k) :=> a) -> do
1296 rootsToPropagate <- forM roots $ \r@(RootTrigger (_, occRef, k) :=> a) -> do
527 occBefore <- liftIO $ do
1297 occBefore <- liftIO $ do
528 occBefore <- readIORef occRef
1298 occBefore <- readIORef occRef
529− writeIORef occRef $ DMap.insert k a occBefore
1299+ writeIORef occRef $! DMap.insert k a occBefore
530 return occBefore
1300 return occBefore
531 if DMap.null occBefore
1301 if DMap.null occBefore
532 then do scheduleRootClear occRef
1302 then do scheduleRootClear occRef
533 return $ Just r
1303 return $ Just r
534 else return Nothing
1304 else return Nothing
535 forM_ (catMaybes rootsToPropagate) $ \(RootTrigger (subscribersRef, _, _) :=> Identity a) -> do
1305 forM_ (catMaybes rootsToPropagate) $ \(RootTrigger (subscribersRef, _, _) :=> Identity a) -> do
536− propagateAndUpdateSubscribersRef subscribersRef a
1306+ propagate a subscribersRef
537− delayedRef <- EventM $ asks eventEnvDelayedMerges
1307+ delayedRef <- asksEventEnv eventEnvDelayedMerges
538 let go = do
1308 let go = do
539 delayed <- liftIO $ readIORef delayedRef
1309 delayed <- liftIO $ readIORef delayedRef
540 case IntMap.minViewWithKey delayed of
1310 case IntMap.minViewWithKey delayed of
541 Nothing -> return ()
1311 Nothing -> return ()
542− Just ((currentHeight, current), future) -> do
1312+ Just ((currentHeight, cur), future) -> do
543− when debugPropagate $ liftIO $ putStrLn $ "Running height " ++ show currentHeight
1313+ tracePropagate (Proxy :: Proxy x) $ "Running height " ++ show currentHeight
544− putCurrentHeight currentHeight
1314+ putCurrentHeight $ Height currentHeight
545− liftIO $ writeIORef delayedRef future
1315+ liftIO $ writeIORef delayedRef $! future
546− forM_ current $ \d -> case d of
1316+ sequence_ cur
547− DelayedMerge subscribed -> do
548− height <- liftIO $ readIORef $ mergeSubscribedHeight subscribed
549− case height `compare` currentHeight of
550− LT -> error "Somehow a merge's height has been decreased after it was scheduled"
551− GT -> scheduleMerge height subscribed -- The height has been increased (by a coincidence event; TODO: is this the only way?)
553− m <- liftIO $ readIORef $ mergeSubscribedAccum subscribed
554− liftIO $ writeIORef (mergeSubscribedAccum subscribed) DMap.empty
555− --TODO: Assert that m is not empty
556− liftIO $ writeIORef (mergeSubscribedOccurrence subscribed) $ Just m
557− scheduleClear $ mergeSubscribedOccurrence subscribed
558− propagateAndUpdateSubscribersRef (mergeSubscribedSubscribers subscribed) m
561 putCurrentHeight maxBound
1319 putCurrentHeight maxBound
563− when debugPropagate $ putStrLn "Done running an event frame"
1321+ tracePropagate (Proxy :: Proxy x) "Done running an event frame"
564 return result
1322 return result
566−data SomeMaybeIORef = forall a. SomeMaybeIORef (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?)
568−data SomeDMapIORef = forall k. SomeDMapIORef (IORef (DMap k Identity))
1333+newtype Clear a = Clear (IORef (Maybe a))
570−data SomeAssignment = forall a. SomeAssignment (Hold a) a
1335+newtype IntClear a = IntClear (IORef (IntMap a))
572−data DelayedMerge = forall k. DelayedMerge (MergeSubscribed k)
1337+newtype RootClear k = RootClear (IORef (DMap k Identity))
1339+data SomeAssignment x = forall a. SomeAssignment {-# UNPACK #-} !(IORef a) {-# UNPACK #-} !(IORef [Weak (Invalidator x)]) a
574debugFinalize :: Bool
1341debugFinalize :: Bool
575debugFinalize = False
1342debugFinalize = False
577mkWeakPtrWithDebug :: a -> String -> IO (Weak a)
1344mkWeakPtrWithDebug :: a -> String -> IO (Weak a)
578−mkWeakPtrWithDebug x debugNote = mkWeakPtr x $
1345+mkWeakPtrWithDebug x debugNote = do
579− if debugFinalize
1346+ x' <- evaluate x
580− then Just $ putStrLn $ "finalizing: " ++ debugNote
1347+ mkWeakPtr x' $
581− else Nothing
1348+ if debugFinalize
1349+ then Just $ debugStrLn $ "finalizing: " ++ debugNote
583type WeakList a = [Weak a]
1352type WeakList a = [Weak a]
585−--TODO: Is it faster to clean up every time, or to occasionally go through and clean up as needed?
1354+type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
586−traverseAndCleanWeakList_ :: Monad m => (wa -> m (Maybe a)) -> [wa] -> (a -> m ()) -> m [wa]
587−traverseAndCleanWeakList_ deRef ws f = go ws
588− where go [] = return []
598−-- | Propagate everything at the current height
599−propagate :: a -> [WeakSubscriber a] -> EventM [WeakSubscriber a]
600−propagate a subscribers = do
601− traverseAndCleanWeakList_ (liftIO . deRefWeakSubscriber) subscribers $ \s -> case s of
602− SubscriberPush compute subscribed -> do
603− when debugPropagate $ liftIO $ putStrLn $ "SubscriberPush" <> showNodeId subscribed
606− Nothing -> return () -- No need to write a Nothing back into the Ref
608− liftIO $ writeIORef (pushSubscribedOccurrence subscribed) occ
609− scheduleClear $ pushSubscribedOccurrence subscribed
610− liftIO . writeIORef (pushSubscribedSubscribers subscribed) =<< propagate o =<< liftIO (readIORef (pushSubscribedSubscribers subscribed))
611− SubscriberMerge k subscribed -> do
612− when debugPropagate $ liftIO $ putStrLn $ "SubscriberMerge" <> showNodeId subscribed
613− oldM <- liftIO $ readIORef $ mergeSubscribedAccum subscribed
614− liftIO $ writeIORef (mergeSubscribedAccum subscribed) $ DMap.insertWith (error "Same key fired multiple times for") k (Identity a) oldM
615− when (DMap.null oldM) $ do -- Only schedule the firing once
616− height <- liftIO $ readIORef $ mergeSubscribedHeight subscribed
617− --TODO: assertions about height
618− currentHeight <- getCurrentHeight
619− when (height <= currentHeight) $ error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")"
620− scheduleMerge height subscribed
621− SubscriberFan subscribed -> do
622− subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
623− when debugPropagate $ liftIO $ putStrLn $ "SubscriberFan" <> showNodeId subscribed <> ": " ++ show (DMap.size subs) ++ " keys subscribed, " ++ show (DMap.size a) ++ " keys firing"
624− --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
625− forM_ (DMap.toList a) $ \(k :=> Identity v) -> case DMap.lookup (FanSubscriberKey k) subs of
627− when debugPropagate $ liftIO $ putStrLn "No subscriber for key"
629− Just (Identity subsubs) -> do
630− _ <- propagate v subsubs --TODO: use the value of this
632− --TODO: The following is way too slow to do all the time
633− subs' <- liftIO $ forM (DMap.toList subs) $ ((\(FanSubscriberKey k :=> Identity subsubs) -> do
634− subsubs' <- traverseAndCleanWeakList_ (liftIO . deRefWeakSubscriber) subsubs (const $ return ())
635− return $ if null subsubs'
637− else Just $ FanSubscriberKey k :=> Identity subsubs') :: DSum (FanSubscriberKey k) Identity -> IO (Maybe (DSum (FanSubscriberKey k) Identity)))
638− liftIO $ writeIORef (fanSubscribedSubscribers subscribed) $ DMap.fromDistinctAscList $ catMaybes subs'
639− SubscriberHold h -> do
640− invalidators <- liftIO $ readIORef $ holdInvalidators h
641− when debugPropagate $ liftIO $ putStrLn $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
642− toAssignRef <- askToAssignRef
643− liftIO $ modifyIORef' toAssignRef (SomeAssignment h a :)
644− SubscriberSwitch subscribed -> do
645− when debugPropagate $ liftIO $ putStrLn $ "SubscriberSwitch" <> showNodeId subscribed
646− liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
647− scheduleClear $ switchSubscribedOccurrence subscribed
648− subs <- liftIO $ readIORef $ switchSubscribedSubscribers subscribed
649− liftIO . writeIORef (switchSubscribedSubscribers subscribed) =<< propagate a subs
650− SubscriberCoincidenceOuter subscribed -> do
651− when debugPropagate $ liftIO $ putStrLn $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
652− outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
653− when debugPropagate $ liftIO $ putStrLn $ " outerHeight = " <> show outerHeight
654− (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
655− when debugPropagate $ liftIO $ putStrLn $ " isJust occ = " <> show (isJust occ)
656− when debugPropagate $ liftIO $ putStrLn $ " innerHeight = " <> show innerHeight
657− liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
658− scheduleClear $ coincidenceSubscribedInnerParent subscribed
661− when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
662− writeIORef (coincidenceSubscribedHeight subscribed) innerHeight
663− mapM_ invalidateSubscriberHeight =<< readIORef (coincidenceSubscribedSubscribers subscribed)
664− mapM_ recalculateSubscriberHeight =<< readIORef (coincidenceSubscribedSubscribers subscribed)
665− Just o -> do -- Since it's already firing, no need to adjust height
666− liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
667− scheduleClear $ coincidenceSubscribedOccurrence subscribed
668− liftIO . writeIORef (coincidenceSubscribedSubscribers subscribed) =<< propagate o =<< liftIO (readIORef (coincidenceSubscribedSubscribers subscribed))
669− SubscriberCoincidenceInner subscribed -> do
670− when debugPropagate $ liftIO $ putStrLn $ "SubscriberCoincidenceInner" <> showNodeId subscribed
671− liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
672− scheduleClear $ coincidenceSubscribedOccurrence subscribed
673− liftIO . writeIORef (coincidenceSubscribedSubscribers subscribed) =<< propagate a =<< liftIO (readIORef (coincidenceSubscribedSubscribers subscribed))
675−data SomeCoincidenceInfo = forall a. SomeCoincidenceInfo (Weak (Subscriber a)) (Subscriber a) (Maybe (CoincidenceSubscribed a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
677−subscribeCoincidenceInner :: Event a -> Int -> CoincidenceSubscribed a -> EventM (Maybe a, Int, EventSubscribed a)
678−subscribeCoincidenceInner o outerHeight subscribedUnsafe = do
679− subInner <- liftIO $ newSubscriberCoincidenceInner subscribedUnsafe
680− wsubInner <- liftIO $ mkWeakPtrWithDebug subInner "SubscriberCoincidenceInner"
681− innerSubd <- {-# SCC "innerSubd" #-} (subscribe o $ WeakSubscriberSimple wsubInner)
682− innerOcc <- liftIO $ getEventSubscribedOcc innerSubd
683− innerHeight <- liftIO $ readIORef $ eventSubscribedHeightRef innerSubd
684− let height = max innerHeight outerHeight
685− emitCoincidenceInfo $ SomeCoincidenceInfo wsubInner subInner $ if height > outerHeight then Just subscribedUnsafe else Nothing
686− return (innerOcc, height, innerSubd)
688−readBehavior :: Behavior a -> IO a
1359+#ifdef DEBUG
689−readBehavior b = runBehaviorM (readBehaviorTracked b) Nothing --TODO: Specialize readBehaviorTracked to the Nothing and Just cases
691−runBehaviorM :: BehaviorM a -> Maybe (Weak Invalidator, IORef [SomeBehaviorSubscribed]) -> IO a
1361+debugSubscriber :: forall x a. HasSpiderTimeline x => String -> Subscriber x a -> IO (Subscriber x a)
692−runBehaviorM a mwi = runReaderT (unBehaviorM a) mwi
1362+debugSubscriber description = return . debugSubscriber' description
1364+debugSubscriber' :: forall x a. HasSpiderTimeline x => String -> Subscriber x a -> Subscriber x a
1365+debugSubscriber' description subscribed = Subscriber
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"
694−askInvalidator :: BehaviorM (Maybe (Weak Invalidator))
695−askInvalidator = liftM (fmap fst) $ BehaviorM ask
697−askParentsRef :: BehaviorM (Maybe (IORef [SomeBehaviorSubscribed]))
1381+{-# INLINE withIncreasedDepth #-}
698−askParentsRef = liftM (fmap snd) $ BehaviorM ask
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
1386+ liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) pred
700−readBehaviorTracked :: Behavior a -> BehaviorM a
1389+{-# INLINE tracePropagate #-}
701−readBehaviorTracked b = case b of
1390+tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
702− BehaviorHold h -> do
1391+tracePropagate p = when debugPropagate . trace p
703− result <- liftIO $ readIORef $ holdValue h
1392+
704− askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (holdInvalidators h) (wi:))
1393+{-# INLINE traceInvalidate #-}
705− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedHold h) :))
1394+traceInvalidate :: String -> IO ()
706− liftIO $ touch $ holdSubscriber h
1395+traceInvalidate = when debugInvalidate . liftIO . debugStrLn
708− BehaviorConst a -> return a
1397+{-# INLINE traceInvalidateHeight #-}
709− BehaviorPull p -> do
1398+traceInvalidateHeight :: String -> IO ()
710− val <- liftIO $ readIORef $ pullValue p
1399+traceInvalidateHeight = when debugInvalidateHeight . liftIO . debugStrLn
712− Just subscribed -> do
1401+{-# INLINE trace #-}
713− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
1402+trace :: (CanTrace x m) => proxy x -> String -> m ()
714− askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (pullSubscribedInvalidators subscribed) (wi:))
1403+trace p message = traceM p $ return message
715− liftIO $ touch $ pullSubscribedOwnInvalidator subscribed
1404+
716− return $ pullSubscribedValue subscribed
1405+{-# INLINE traceM #-}
717− Nothing -> do
1406+traceM :: forall x proxy m. (CanTrace x m) => proxy x -> m String -> m ()
718− i <- liftIO $ newInvalidatorPull p
1407+traceM _ getMessage = do
719− wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorPull"
1408+ message <- getMessage
720− parentsRef <- liftIO $ newIORef []
1409+ d <- liftIO $ readIORef $ _spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)
721− a <- liftIO $ runReaderT (unBehaviorM $ pullCompute p) $ Just (wi, parentsRef)
1410+ liftIO $ debugStrLn $ replicate d ' ' <> message
722− invsRef <- liftIO . newIORef . maybeToList =<< askInvalidator
1411+
723− parents <- liftIO $ readIORef parentsRef
1412+#else
724− let subscribed = PullSubscribed
1413+
725− { pullSubscribedValue = a
1414+{-# INLINE withIncreasedDepth #-}
726− , pullSubscribedInvalidators = invsRef
1415+withIncreasedDepth :: proxy x -> m a -> m a
727− , pullSubscribedOwnInvalidator = i
1416+withIncreasedDepth _ = id
728− , pullSubscribedParents = parents
1417+
729− }
1418+{-# INLINE tracePropagate #-}
730− liftIO $ writeIORef (pullValue p) $ Just subscribed
1419+tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
731− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
1420+tracePropagate _ _ = return ()
1422+{-# INLINE traceInvalidate #-}
1423+traceInvalidate :: String -> IO ()
1424+traceInvalidate _ = return ()
1426+{-# INLINE traceInvalidateHeight #-}
1427+traceInvalidateHeight :: String -> IO ()
1428+traceInvalidateHeight _ = return ()
1430+{-# INLINE debugSubscriber #-}
1431+debugSubscriber :: String -> Subscriber x a -> IO (Subscriber x a)
1432+debugSubscriber _ = return
1434+{-# INLINE debugSubscriber' #-}
1435+debugSubscriber' :: String -> Subscriber x a -> Subscriber x a
1436+debugSubscriber' _ = id
1440+{-# INLINE trace #-}
1441+trace :: (CanTrace x m) => proxy x -> String -> m ()
1442+trace _ _ = return ()
1444+{-# INLINE traceM #-}
1445+traceM :: (CanTrace x m) => proxy x -> m String -> m ()
1446+traceM _ _ = return ()
1450+whoCreatedIORef :: IORef a -> IO [String]
1451+whoCreatedIORef (IORef a) = whoCreated $! a
1453+groupByHead :: Eq a => [NonEmpty a] -> [(a, NonEmpty [a])]
1456+ (x :| xs) : t -> case groupByHead t of
1457+ [] -> [(x, xs :| [])]
1459+ | x == y -> (x, xs `NonEmpty.cons` yss) : t'
1460+ | otherwise -> (x, xs :| []) : l
1462+listsToForest :: Eq a => [[a]] -> Forest a
1463+listsToForest lists = buildForest <$> groupByHead (mapMaybe nonEmpty lists)
1464+ where buildForest (a, lists') = Node a $ listsToForest $ toList lists'
1466+showStacks :: [[String]] -> String
1467+showStacks = drawForest . listsToForest . fmap (filterStack "Reflex.Spider.Internal")
1469+filterStack :: String -> [String] -> [String]
1470+#ifdef DEBUG_HIDE_INTERNALS
1471+filterStack prefix = filter (not . (prefix `isPrefixOf`))
1473+filterStack prefix = id
1478+data EventLoopException = EventLoopException [[String]]
1479+instance Exception EventLoopException
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
1488+data EventLoopException = EventLoopException
1489+instance Exception EventLoopException
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"
1498+{-# INLINE propagateSubscriberHold #-}
1499+propagateSubscriberHold :: forall x p. (HasSpiderTimeline x, Patch p) => Hold x p -> p -> EventM x ()
1500+propagateSubscriberHold h a = do
1501+ {-# SCC "trace" #-} when debugPropagate $ traceM (Proxy :: Proxy x) $ liftIO $ do
1502+ invalidators <- liftIO $ readIORef $ holdInvalidators h
1503+ return $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
1505+ v <- {-# SCC "read" #-} liftIO $ readIORef $ holdValue h
1506+ case {-# SCC "apply" #-} apply a v of
1507+ Nothing -> return ()
1509+ {-# SCC "trace2" #-} withIncreasedDepth (Proxy :: Proxy x) $
1510+ tracePropagate (Proxy :: Proxy x) ("propagateSubscriberHold: assigning Hold" <> showNodeId h)
1511+ vRef <- {-# SCC "vRef" #-} liftIO $ evaluate $ holdValue h
1512+ iRef <- {-# SCC "iRef" #-} liftIO $ evaluate $ holdInvalidators h
1513+ defer $ {-# SCC "assignment" #-} SomeAssignment vRef iRef v'
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
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)
1520+askInvalidator :: BehaviorM x (Maybe (Weak (Invalidator x)))
1524+ Nothing -> return Nothing
1525+ Just (!wi, _) -> return $ Just wi
1527+askParentsRef :: BehaviorM x (Maybe (IORef [SomeBehaviorSubscribed x]))
1531+ Nothing -> return Nothing
1532+ Just (_, !p) -> return $ Just p
1534+askBehaviorHoldInits :: BehaviorM x (IORef [SomeHoldInit x])
1535+askBehaviorHoldInits = do
1539+{-# INLINE getDynHold #-}
1540+getDynHold :: (Defer (SomeHoldInit x) m, Patch p) => Dyn x p -> m (Hold x p)
1542+ mh <- liftIO $ readIORef $ unDyn d
1544+ HoldDyn h -> return h
1545+ UnsafeDyn (readV0, v') -> do
1546+ holdInits <- getDeferralQueue
1547+ v0 <- liftIO $ runBehaviorM readV0 Nothing holdInits
1549+ BuildDyn (readV0, v') -> do
1550+ v0 <- liftIO $ runEventM readV0
1555+ liftIO $ writeIORef (unDyn d) $ HoldDyn h
734−readEvent :: Event a -> ResultM (Maybe a)
735−readEvent e = case e of
736− EventRoot k r -> liftIO . liftM (fmap runIdentity . DMap.lookup k) . readIORef $ rootOccurrence r
737− EventNever -> return Nothing
739− subscribed <- getPushSubscribed p
741− result <- readIORef $ pushSubscribedOccurrence subscribed -- Since ResultM is always called after the final height is reached, this will always be valid
742− touch $ pushSubscribedSelf subscribed
745− subscribed <- getMergeSubscribed m
747− result <- readIORef $ mergeSubscribedOccurrence subscribed
748− touch $ mergeSubscribedSelf subscribed
751− parentOcc <- readEvent $ fanParent f
752− return . fmap runIdentity $ DMap.lookup k =<< parentOcc
754− subscribed <- getSwitchSubscribed s
756− result <- readIORef $ switchSubscribedOccurrence subscribed
757− touch $ switchSubscribedSelf subscribed
758− touch $ switchSubscribedOwnInvalidator subscribed
760− EventCoincidence c -> do
761− subscribed <- getCoincidenceSubscribed c
763− result <- readIORef $ coincidenceSubscribedOccurrence subscribed
764− touch $ coincidenceSubscribedOuter subscribed
765− --TODO: do we need to touch the inner subscriber?
768-- Always refers to 0
1559-- Always refers to 0
769{-# NOINLINE zeroRef #-}
1560{-# NOINLINE zeroRef #-}
770−zeroRef :: IORef Int
1561+zeroRef :: IORef Height
771−zeroRef = unsafePerformIO $ newIORef 0
1562+zeroRef = unsafePerformIO $ newIORef zeroHeight
773−getEventSubscribed :: Event a -> EventM (EventSubscribed 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)
774−getEventSubscribed e = case e of
1565+getRootSubscribed k r sub = do
775− EventRoot k r -> liftM EventSubscribedRoot $ getRootSubscribed k r
1566+ mSubscribed <- readIORef $ rootSubscribed r
776− EventNever -> return EventSubscribedNever
1567+ let getOcc = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
777− EventPush p -> liftM EventSubscribedPush $ getPushSubscribed p
778− EventFan k f -> liftM (EventSubscribedFan k) $ getFanSubscribed f
779− EventMerge m -> liftM EventSubscribedMerge $ getMergeSubscribed m
780− EventSwitch s -> liftM EventSubscribedSwitch $ getSwitchSubscribed s
781− EventCoincidence c -> liftM EventSubscribedCoincidence $ getCoincidenceSubscribed c
783−debugSubscribe :: Bool
784−debugSubscribe = False
786−subscribeEventSubscribed :: EventSubscribed a -> WeakSubscriber a -> IO ()
787−subscribeEventSubscribed es ws = case es of
788− EventSubscribedRoot r -> do
789− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Root"
790− modifyIORef' (rootSubscribedSubscribers r) (ws:)
791− EventSubscribedNever -> do
792− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Never"
794− EventSubscribedPush subscribed -> do
795− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Push"
796− modifyIORef' (pushSubscribedSubscribers subscribed) (ws:)
797− EventSubscribedFan k subscribed -> do
798− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Fan"
799− modifyIORef' (fanSubscribedSubscribers subscribed) $ DMap.insertWith (liftA2 (++)) (FanSubscriberKey k) (Identity [ws])
800− EventSubscribedMerge subscribed -> do
801− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Merge"
802− modifyIORef' (mergeSubscribedSubscribers subscribed) (ws:)
803− EventSubscribedSwitch subscribed -> do
804− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Switch"
805− modifyIORef' (switchSubscribedSubscribers subscribed) (ws:)
806− EventSubscribedCoincidence subscribed -> do
807− when debugSubscribe $ liftIO $ putStrLn $ "subscribeEventSubscribed Coincidence"
808− modifyIORef' (coincidenceSubscribedSubscribers subscribed) (ws:)
810−getEventSubscribedOcc :: EventSubscribed a -> IO (Maybe a)
811−getEventSubscribedOcc es = case es of
812− EventSubscribedRoot r -> rootSubscribedOccurrence r
813− EventSubscribedNever -> return Nothing
814− EventSubscribedPush subscribed -> readIORef $ pushSubscribedOccurrence subscribed
815− EventSubscribedFan k subscribed -> do
816− parentOcc <- getEventSubscribedOcc $ fanSubscribedParent subscribed
817− let occ = fmap runIdentity $ DMap.lookup k =<< parentOcc
819− EventSubscribedMerge subscribed -> readIORef $ mergeSubscribedOccurrence subscribed
820− EventSubscribedSwitch subscribed -> readIORef $ switchSubscribedOccurrence subscribed
821− EventSubscribedCoincidence subscribed -> readIORef $ coincidenceSubscribedOccurrence subscribed
823−eventSubscribedHeightRef :: EventSubscribed a -> IORef Int
824−eventSubscribedHeightRef es = case es of
825− EventSubscribedRoot _ -> zeroRef
826− EventSubscribedNever -> zeroRef
827− EventSubscribedPush subscribed -> pushSubscribedHeight subscribed
828− EventSubscribedFan _ subscribed -> eventSubscribedHeightRef $ fanSubscribedParent subscribed
829− EventSubscribedMerge subscribed -> mergeSubscribedHeight subscribed
830− EventSubscribedSwitch subscribed -> switchSubscribedHeight subscribed
831− EventSubscribedCoincidence subscribed -> coincidenceSubscribedHeight subscribed
833−subscribe :: Event a -> WeakSubscriber a -> EventM (EventSubscribed a)
835− subd <- getEventSubscribed e
836− liftIO $ subscribeEventSubscribed subd ws
839−noinlineFalse :: Bool
840−noinlineFalse = False
841−{-# NOINLINE noinlineFalse #-}
843−getRootSubscribed :: GCompare k => k a -> Root k -> EventM (RootSubscribed a)
844−getRootSubscribed k r = do
845− mSubscribed <- liftIO $ readIORef $ rootSubscribed r
846 case DMap.lookup k mSubscribed of
1568 case DMap.lookup k mSubscribed of
847− Just subscribed -> return subscribed
1569+ Just subscribed -> {-# SCC "hitRoot" #-} do
848− Nothing -> liftIO $ do
1570+ sln <- subscribeRootSubscribed subscribed sub
849− subscribersRef <- newIORef []
1571+ occ <- getOcc
850− subscribed <- newRootSubscribed (liftM (fmap runIdentity . DMap.lookup k) $ readIORef $ rootOccurrence r) subscribersRef
1572+ return (sln, subscribed, occ)
851− -- Strangely, init needs the same stuff as a RootSubscribed has, but it must not be the same as the one that everyone's subscribing to, or it'll leak memory
1573+ Nothing -> {-# SCC "missRoot" #-} do
852− uninit <- rootInit r k $ RootTrigger (subscribersRef, rootOccurrence r, k)
1574+ weakSelf <- newIORef $ error "getRootSubscribed: weakSelfRef not initialized"
853− addFinalizer subscribed $ do
1575+ let !cached = rootSubscribed r
854− when noinlineFalse $ putStr "" -- For some reason, without this line, the finalizer will run earlier than it should
1576+ uninitRef <- newIORef $ error "getRootsubscribed: uninitRef not initialized"
855−-- putStrLn "Uninit root"
1577+ (subs, sln) <- WeakBag.singleton sub weakSelf cleanupRootSubscribed
857− liftIO $ modifyIORef' (rootSubscribed r) $ DMap.insert k subscribed
1579+ tracePropagate (Proxy::Proxy x) $ "getRootSubscribed: calling rootInit"
858− return subscribed
1580+
859−
1581+ uninit <- rootInit r k $ RootTrigger (subs, rootOccurrence r, k)
860−-- When getPushSubscribed returns, the PushSubscribed returned will have a fully filled-in
1582+ writeIORef uninitRef $! uninit
861−getPushSubscribed :: Push a b -> EventM (PushSubscribed a b)
1583+#ifdef DEBUG_NODEIDS
862−getPushSubscribed p = do
1584+ nid <- newNodeId
863− mSubscribed <- liftIO $ readIORef $ pushSubscribed p
1585+#endif
864− case mSubscribed of
1586+ let !subscribed = RootSubscribed
865− Just subscribed -> return subscribed
1587+ { rootSubscribedKey = k
866− Nothing -> do -- Not yet subscribed
1588+ , rootSubscribedCachedSubscribed = cached
867− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ liftM fromJust $ readIORef $ pushSubscribed p
1589+ , rootSubscribedOccurrence = getOcc
868− s <- liftIO $ newSubscriberPush (pushCompute p) subscribedUnsafe
1590+ , rootSubscribedSubscribers = subs
869− ws <- liftIO $ mkWeakPtrWithDebug s "SubscriberPush"
1591+ , rootSubscribedUninit = uninit
870− subd <- subscribe (pushParent p) $ WeakSubscriberSimple ws
1592+ , rootSubscribedWeakSelf = weakSelf
871− parentOcc <- liftIO $ getEventSubscribedOcc subd
872− occ <- liftM join $ mapM (pushCompute p) parentOcc
873− occRef <- liftIO $ newIORef occ
874− when (isJust occ) $ scheduleClear occRef
875− subscribersRef <- liftIO $ newIORef []
876− let subscribed = PushSubscribed
877− { pushSubscribedOccurrence = occRef
878− , pushSubscribedHeight = eventSubscribedHeightRef subd -- Since pushes have the same height as their parents, share the ref
879− , pushSubscribedSubscribers = subscribersRef
880− , pushSubscribedSelf = unsafeCoerce s
881− , pushSubscribedParent = subd
882#ifdef DEBUG_NODEIDS
1593#ifdef DEBUG_NODEIDS
883− , pushSubscribedNodeId = unsafeNodeId p
1594+ , rootSubscribedNodeId = nid
886− liftIO $ writeIORef (pushSubscribed p) $ Just subscribed
1597+ -- If we die at the same moment that all our children die, they will
887− return subscribed
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.
1605+ cs <- readIORef $ _weakBag_children subs
1606+ when (not $ IntMap.null cs) (cleanupRootSubscribed subscribed)
1607+ writeIORef weakSelf =<< evaluate =<< mkWeakPtr subscribed (Just finalCleanup)
1608+ 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
1610+ return (sln, subscribed, occ)
1612+#ifdef USE_TEMPLATE_HASKELL
1613+{-# ANN cleanupRootSubscribed "HLint: ignore Redundant bracket" #-}
1615+cleanupRootSubscribed :: RootSubscribed x a -> IO ()
1616+cleanupRootSubscribed self@RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached } = do
1617+ rootSubscribedUninit self
1618+ modifyIORef' cached $ DMap.delete k
889−getMergeSubscribed :: forall k. GCompare k => Merge k -> EventM (MergeSubscribed k)
1620+{-# INLINE subscribeRootSubscribed #-}
890−getMergeSubscribed m = {-# SCC "getMergeSubscribed.entire" #-} do
1621+subscribeRootSubscribed :: RootSubscribed x a -> Subscriber x a -> IO WeakBagTicket
891− mSubscribed <- liftIO $ readIORef $ mergeSubscribed m
1622+subscribeRootSubscribed subscribed sub = WeakBag.insert sub (rootSubscribedSubscribers subscribed) (rootSubscribedWeakSelf subscribed) cleanupRootSubscribed
892− case mSubscribed of
1623+
893− Just subscribed -> return subscribed
1624+newtype EventSelectorInt x a = EventSelectorInt { selectInt :: Int -> Event x a }
894− Nothing -> if DMap.null $ mergeParents m then emptyMergeSubscribed else do
1625+
895− subscribedRef <- liftIO $ newIORef $ error "getMergeSubscribed: subscribedRef not yet initialized"
1626+data FanInt x a = FanInt
896− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
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
897− s <- liftIO $ newBox subscribedUnsafe
1628+ , _fanInt_subscriptionRef :: {-# UNPACK #-} !(IORef (EventSubscription x)) -- This should have a valid subscription iff subscribers is non-empty
898− ws <- liftIO $ mkWeakPtrWithDebug s "SubscriberMerge"
1629+ , _fanInt_occRef :: {-# UNPACK #-} !(IORef (IntMap a))
899− subscribers :: [(Any, Maybe (DSum k Identity), Int, DSum k EventSubscribed)] <- forM (DMap.toList $ mergeParents m) $ {-# SCC "getMergeSubscribed.a" #-} \(k :=> e) -> {-# SCC "getMergeSubscribed.a1" #-} do
900− parentSubd <- {-# SCC "getMergeSubscribed.a.parentSubd" #-} subscribe e $ WeakSubscriberMerge k ws
901− parentOcc <- {-# SCC "getMergeSubscribed.a.parentOcc" #-} liftIO $ getEventSubscribedOcc parentSubd
902− height <- {-# SCC "getMergeSubscribed.a.height" #-} liftIO $ readIORef $ eventSubscribedHeightRef parentSubd
903− return $ {-# SCC "getMergeSubscribed.a.returnVal" #-} (unsafeCoerce s :: Any, fmap ((k :=>) . Identity) parentOcc, height, k :=> parentSubd)
904− let dm = DMap.fromDistinctAscList $ catMaybes $ map (\(_, x, _, _) -> x) subscribers
905− subscriberHeights = map (\(_, _, x, _) -> x) subscribers
907− if any (==invalidHeight) subscriberHeights --TODO: Replace 'any' with invalidHeight-preserving 'maximum'
909− else succ $ Prelude.maximum subscriberHeights -- This is safe because the DMap will never be empty here
910− currentHeight <- getCurrentHeight
911− let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
912− then (if DMap.null dm then Nothing else Just dm, DMap.empty)
914− when (not $ DMap.null accum) $ do
915− scheduleMerge myHeight subscribedUnsafe
916− occRef <- liftIO $ newIORef occ
917− when (isJust occ) $ scheduleClear occRef
918− accumRef <- liftIO $ newIORef accum
919− heightRef <- liftIO $ newIORef myHeight
920− subsRef <- liftIO $ newIORef []
921− let subscribed = MergeSubscribed
922− { mergeSubscribedOccurrence = occRef
923− , mergeSubscribedAccum = accumRef
924− , mergeSubscribedHeight = heightRef
925− , mergeSubscribedSubscribers = subsRef
926− , mergeSubscribedSelf = unsafeCoerce $ map (\(x, _, _, _) -> x) subscribers --TODO: Does lack of strictness make this leak?
927− , mergeSubscribedParents = DMap.fromDistinctAscList $ map (\(_, _, _, x) -> x) subscribers
928#ifdef DEBUG_NODEIDS
1630#ifdef DEBUG_NODEIDS
929− , mergeSubscribedNodeId = unsafeNodeId m
1631+ , _fanInt_nodeId :: {-# UNPACK #-} !Int
932− liftIO $ writeIORef subscribedRef subscribed
1634+
933− return subscribed
1635+newFanInt :: IO (FanInt x a)
934− where emptyMergeSubscribed = do --TODO: This should never happen
1636+newFanInt = do
935− occRef <- liftIO $ newIORef Nothing
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
936− accumRef <- liftIO $ newIORef DMap.empty
1638+ subscriptionRef <- newIORef $ error "fanInt: no subscription"
937− subsRef <- liftIO $ newIORef []
1639+ occRef <- newIORef $ error "fanInt: no occurrence"
938− return $ MergeSubscribed
939− { mergeSubscribedOccurrence = occRef
940− , mergeSubscribedAccum = accumRef
941− , mergeSubscribedHeight = zeroRef
942− , mergeSubscribedSubscribers = subsRef --TODO: This will definitely leak
943− , mergeSubscribedSelf = unsafeCoerce ()
944− , mergeSubscribedParents = DMap.empty
945#ifdef DEBUG_NODEIDS
1640#ifdef DEBUG_NODEIDS
946− , mergeSubscribedNodeId = -1
1641+ nodeId <- newNodeId
948− }
1643+ return $ FanInt
1644+ { _fanInt_subscribers = subscribers
1645+ , _fanInt_subscriptionRef = subscriptionRef
1646+ , _fanInt_occRef = occRef
1647+#ifdef DEBUG_NODEIDS
1648+ , _fanInt_nodeId = nodeId
1652+fanInt :: HasSpiderTimeline x => Event x (IntMap a) -> EventSelectorInt x a
1653+fanInt p = unsafePerformIO $ do
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
1676+ writeIORef (_fanInt_subscriptionRef self) subscription
1677+ writeIORef (_fanInt_occRef self) $ fromMaybe IntMap.empty parentOcc
1678+ scheduleIntClear $ _fanInt_occRef self
1680+ b <- FastMutableIntMap.lookup (_fanInt_subscribers self) k >>= \case
1682+ b <- FastWeakBag.empty
1683+ FastMutableIntMap.insert (_fanInt_subscribers self) k b
1686+ ticket <- liftIO $ FastWeakBag.insert sub b
1687+ currentOcc <- readIORef (_fanInt_occRef self)
1689+ subscribed <- fanIntSubscribed ticket self
1690+ return (EventSubscription (FastWeakBag.remove ticket) subscribed, IntMap.lookup k currentOcc)
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)
1699+ , eventSubscribedGetParents = return [subscribedParent]
1700+ , eventSubscribedHasOwnHeightRef = False
1701+ , eventSubscribedWhoCreated = whoCreatedIORef $ _fanInt_subscriptionRef self
950−getFanSubscribed :: GCompare k => Fan k -> EventM (FanSubscribed k)
1706+{-# INLINABLE getFanSubscribed #-}
951−getFanSubscribed f = do
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))
1708+getFanSubscribed k f sub = do
952 mSubscribed <- liftIO $ readIORef $ fanSubscribed f
1709 mSubscribed <- liftIO $ readIORef $ fanSubscribed f
953 case mSubscribed of
1710 case mSubscribed of
954− Just subscribed -> return subscribed
1711+ Just subscribed -> {-# SCC "hitFan" #-} liftIO $ do
955− Nothing -> do
1712+ sln <- subscribeFanSubscribed k subscribed sub
956− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ liftM fromJust $ readIORef $ fanSubscribed f
1713+ occ <- readIORef $ fanSubscribedOccurrence subscribed
957− sub <- liftIO $ newSubscriberFan subscribedUnsafe
1714+ return (sln, subscribed, coerce $ DMap.lookup k =<< occ)
958− wsub <- liftIO $ mkWeakPtrWithDebug sub "SubscriberFan"
1715+ Nothing -> {-# SCC "missFan" #-} do
959− subd <- subscribe (fanParent f) $ WeakSubscriberSimple wsub
1716+ subscribedRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribedRef not yet initialized"
960− subscribersRef <- liftIO $ newIORef DMap.empty
1717+ subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1718+ s <- liftIO $ newSubscriberFan subscribedUnsafe
1719+ (subscription, parentOcc) <- subscribeAndRead (fanParent f) s
1720+ weakSelf <- liftIO $ newIORef $ error "getFanSubscribed: weakSelf not yet initialized"
1721+ (subsForK, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupFanSubscribed
1722+ 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
961 let subscribed = FanSubscribed
1728 let subscribed = FanSubscribed
962− { fanSubscribedParent = subd
1729+ { fanSubscribedCachedSubscribed = fanSubscribed f
1730+ , fanSubscribedOccurrence = occRef
1731+ , fanSubscribedParent = subscription
963 , fanSubscribedSubscribers = subscribersRef
1732 , fanSubscribedSubscribers = subscribersRef
964− , fanSubscribedSelf = sub
965#ifdef DEBUG_NODEIDS
1733#ifdef DEBUG_NODEIDS
966− , fanSubscribedNodeId = unsafeNodeId f
1734+ , fanSubscribedNodeId = nid
1737+ let !self = (k, subscribed)
1738+ liftIO $ writeIORef subscribersRef $! DMap.singleton k $ FanSubscribedChildren subsForK self weakSelf
1739+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug self "FanSubscribed"
1740+ liftIO $ writeIORef subscribedRef $! subscribed
969 liftIO $ writeIORef (fanSubscribed f) $ Just subscribed
1741 liftIO $ writeIORef (fanSubscribed f) $ Just subscribed
970− return subscribed
1742+ return (slnForSub, subscribed, coerce $ DMap.lookup k =<< parentOcc)
972−getSwitchSubscribed :: Switch a -> EventM (SwitchSubscribed a)
1744+cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed x k v) -> IO ()
973−getSwitchSubscribed s = do
1745+cleanupFanSubscribed (k, subscribed) = do
1746+ subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1747+ let reducedSubscribers = DMap.delete k subscribers
1748+ if DMap.null reducedSubscribers
1750+ unsubscribe $ fanSubscribedParent subscribed
1751+ -- Not necessary in this case, because this whole FanSubscribed is dead: writeIORef (fanSubscribedSubscribers subscribed) reducedSubscribers
1752+ writeIORef (fanSubscribedCachedSubscribed subscribed) Nothing
1753+ else writeIORef (fanSubscribedSubscribers subscribed) $! reducedSubscribers
1755+{-# INLINE subscribeFanSubscribed #-}
1756+subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed x k v -> Subscriber x (v a) -> IO WeakBagTicket
1757+subscribeFanSubscribed k subscribed sub = do
1758+ subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1759+ case DMap.lookup k subscribers of
1760+ Nothing -> {-# SCC "missSubscribeFanSubscribed" #-} do
1761+ let !self = (k, subscribed)
1762+ weakSelf <- newIORef =<< mkWeakPtrWithDebug self "FanSubscribed"
1763+ (list, sln) <- WeakBag.singleton sub weakSelf cleanupFanSubscribed
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
1766+ Just (FanSubscribedChildren list _ weakSelf) -> {-# SCC "hitSubscribeFanSubscribed" #-} WeakBag.insert sub list weakSelf cleanupFanSubscribed
1768+{-# INLINABLE getSwitchSubscribed #-}
1769+getSwitchSubscribed :: HasSpiderTimeline x => Switch x a -> Subscriber x a -> EventM x (WeakBagTicket, SwitchSubscribed x a, Maybe a)
1770+getSwitchSubscribed s sub = do
974 mSubscribed <- liftIO $ readIORef $ switchSubscribed s
1771 mSubscribed <- liftIO $ readIORef $ switchSubscribed s
975 case mSubscribed of
1772 case mSubscribed of
976− Just subscribed -> return subscribed
1773+ Just subscribed -> {-# SCC "hitSwitch" #-} liftIO $ do
977− Nothing -> do
1774+ sln <- subscribeSwitchSubscribed subscribed sub
1775+ occ <- readIORef $ switchSubscribedOccurrence subscribed
1776+ return (sln, subscribed, occ)
1777+ Nothing -> {-# SCC "missSwitch" #-} do
978 subscribedRef <- liftIO $ newIORef $ error "getSwitchSubscribed: subscribed has not yet been created"
1778 subscribedRef <- liftIO $ newIORef $ error "getSwitchSubscribed: subscribed has not yet been created"
979 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1779 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
980 i <- liftIO $ newInvalidatorSwitch subscribedUnsafe
1780 i <- liftIO $ newInvalidatorSwitch subscribedUnsafe
981− sub <- liftIO $ newSubscriberSwitch subscribedUnsafe
1781+ mySub <- liftIO $ newSubscriberSwitch subscribedUnsafe
982 wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorSwitch"
1782 wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorSwitch"
983 wiRef <- liftIO $ newIORef wi
1783 wiRef <- liftIO $ newIORef wi
984− wsub <- liftIO $ mkWeakPtrWithDebug sub "SubscriberSwitch"
985− selfWeakRef <- liftIO $ newIORef wsub
986 parentsRef <- liftIO $ newIORef [] --TODO: This should be unnecessary, because it will always be filled with just the single parent behavior
1784 parentsRef <- liftIO $ newIORef [] --TODO: This should be unnecessary, because it will always be filled with just the single parent behavior
987− e <- liftIO $ runBehaviorM (readBehaviorTracked (switchParent s)) $ Just (wi, parentsRef)
1785+ holdInits <- getDeferralQueue
988− subd <- subscribe e $ WeakSubscriberSimple wsub
1786+ e <- liftIO $ runBehaviorM (readBehaviorTracked (switchParent s)) (Just (wi, parentsRef)) holdInits
989− subdRef <- liftIO $ newIORef subd
1787+ (subscription@(EventSubscription _ subd), parentOcc) <- subscribeAndRead e mySub
990− parentOcc <- liftIO $ getEventSubscribedOcc subd
1788+ heightRef <- liftIO $ newIORef =<< getEventSubscribedHeight subd
1789+ subscriptionRef <- liftIO $ newIORef subscription
991 occRef <- liftIO $ newIORef parentOcc
1790 occRef <- liftIO $ newIORef parentOcc
992 when (isJust parentOcc) $ scheduleClear occRef
1791 when (isJust parentOcc) $ scheduleClear occRef
993− heightRef <- liftIO $ newIORef =<< readIORef (eventSubscribedHeightRef subd)
1792+ weakSelf <- liftIO $ newIORef $ error "getSwitchSubscribed: weakSelf not yet initialized"
994− subscribersRef <- liftIO $ newIORef []
1793+ (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupSwitchSubscribed
995− let subscribed = SwitchSubscribed
1794+#ifdef DEBUG_NODEIDS
996− { switchSubscribedOccurrence = occRef
1795+ nid <- liftIO newNodeId
1797+ let !subscribed = SwitchSubscribed
1798+ { switchSubscribedCachedSubscribed = switchSubscribed s
1799+ , switchSubscribedOccurrence = occRef
997 , switchSubscribedHeight = heightRef
1800 , switchSubscribedHeight = heightRef
998− , switchSubscribedSubscribers = subscribersRef
1801+ , switchSubscribedSubscribers = subs
999− , switchSubscribedSelf = sub
1000− , switchSubscribedSelfWeak = selfWeakRef
1001 , switchSubscribedOwnInvalidator = i
1802 , switchSubscribedOwnInvalidator = i
1002 , switchSubscribedOwnWeakInvalidator = wiRef
1803 , switchSubscribedOwnWeakInvalidator = wiRef
1003 , switchSubscribedBehaviorParents = parentsRef
1804 , switchSubscribedBehaviorParents = parentsRef
1004 , switchSubscribedParent = switchParent s
1805 , switchSubscribedParent = switchParent s
1005− , switchSubscribedCurrentParent = subdRef
1806+ , switchSubscribedCurrentParent = subscriptionRef
1807+ , switchSubscribedWeakSelf = weakSelf
1006#ifdef DEBUG_NODEIDS
1808#ifdef DEBUG_NODEIDS
1007− , switchSubscribedNodeId = unsafeNodeId s
1809+ , switchSubscribedNodeId = nid
1010− liftIO $ writeIORef subscribedRef subscribed
1812+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "switchSubscribedWeakSelf"
1813+ liftIO $ writeIORef subscribedRef $! subscribed
1011 liftIO $ writeIORef (switchSubscribed s) $ Just subscribed
1814 liftIO $ writeIORef (switchSubscribed s) $ Just subscribed
1012− return subscribed
1815+ return (slnForSub, subscribed, parentOcc)
1014−getCoincidenceSubscribed :: forall a. Coincidence a -> EventM (CoincidenceSubscribed a)
1817+cleanupSwitchSubscribed :: SwitchSubscribed x a -> IO ()
1015−getCoincidenceSubscribed c = do
1818+cleanupSwitchSubscribed subscribed = do
1819+ unsubscribe =<< readIORef (switchSubscribedCurrentParent subscribed)
1820+ finalize =<< readIORef (switchSubscribedOwnWeakInvalidator subscribed) -- We don't need to get invalidated if we're dead
1821+ writeIORef (switchSubscribedCachedSubscribed subscribed) Nothing
1823+{-# INLINE subscribeSwitchSubscribed #-}
1824+subscribeSwitchSubscribed :: SwitchSubscribed x a -> Subscriber x a -> IO WeakBagTicket
1825+subscribeSwitchSubscribed subscribed sub = WeakBag.insert sub (switchSubscribedSubscribers subscribed) (switchSubscribedWeakSelf subscribed) cleanupSwitchSubscribed
1827+{-# INLINABLE getCoincidenceSubscribed #-}
1828+getCoincidenceSubscribed :: forall x a. HasSpiderTimeline x => Coincidence x a -> Subscriber x a -> EventM x (WeakBagTicket, CoincidenceSubscribed x a, Maybe a)
1829+getCoincidenceSubscribed c sub = do
1016 mSubscribed <- liftIO $ readIORef $ coincidenceSubscribed c
1830 mSubscribed <- liftIO $ readIORef $ coincidenceSubscribed c
1017 case mSubscribed of
1831 case mSubscribed of
1018− Just subscribed -> return subscribed
1832+ Just subscribed -> {-# SCC "hitCoincidence" #-} liftIO $ do
1019− Nothing -> do
1833+ sln <- subscribeCoincidenceSubscribed subscribed sub
1834+ occ <- readIORef $ coincidenceSubscribedOccurrence subscribed
1835+ return (sln, subscribed, occ)
1836+ Nothing -> {-# SCC "missCoincidence" #-} do
1020 subscribedRef <- liftIO $ newIORef $ error "getCoincidenceSubscribed: subscribed has not yet been created"
1837 subscribedRef <- liftIO $ newIORef $ error "getCoincidenceSubscribed: subscribed has not yet been created"
1021 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1838 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1022 subOuter <- liftIO $ newSubscriberCoincidenceOuter subscribedUnsafe
1839 subOuter <- liftIO $ newSubscriberCoincidenceOuter subscribedUnsafe
1023− wsubOuter <- liftIO $ mkWeakPtrWithDebug subOuter "subOuter"
1840+ (outerSubscription@(EventSubscription _ outerSubd), outerOcc) <- subscribeAndRead (coincidenceParent c) subOuter
1024− outerSubd <- subscribe (coincidenceParent c) $ WeakSubscriberSimple wsubOuter
1841+ outerHeight <- liftIO $ getEventSubscribedHeight outerSubd
1025− outerOcc <- liftIO $ getEventSubscribedOcc outerSubd
1026− outerHeight <- liftIO $ readIORef $ eventSubscribedHeightRef outerSubd
1027 (occ, height, mInnerSubd) <- case outerOcc of
1842 (occ, height, mInnerSubd) <- case outerOcc of
1028 Nothing -> return (Nothing, outerHeight, Nothing)
1843 Nothing -> return (Nothing, outerHeight, Nothing)
1029 Just o -> do
1844 Just o -> do
@@ -1034,270 +1849,647 @@ getCoincidenceSubscribed c = do
1034 heightRef <- liftIO $ newIORef height
1849 heightRef <- liftIO $ newIORef height
1035 innerSubdRef <- liftIO $ newIORef mInnerSubd
1850 innerSubdRef <- liftIO $ newIORef mInnerSubd
1036 scheduleClear innerSubdRef
1851 scheduleClear innerSubdRef
1037− subscribersRef <- liftIO $ newIORef []
1852+ weakSelf <- liftIO $ newIORef $ error "getCoincidenceSubscribed: weakSelf not yet implemented"
1853+ (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupCoincidenceSubscribed
1854+#ifdef DEBUG_NODEIDS
1855+ nid <- liftIO newNodeId
1038 let subscribed = CoincidenceSubscribed
1857 let subscribed = CoincidenceSubscribed
1039− { coincidenceSubscribedOccurrence = occRef
1858+ { coincidenceSubscribedCachedSubscribed = coincidenceSubscribed c
1859+ , coincidenceSubscribedOccurrence = occRef
1040 , coincidenceSubscribedHeight = heightRef
1860 , coincidenceSubscribedHeight = heightRef
1041− , coincidenceSubscribedSubscribers = subscribersRef
1861+ , coincidenceSubscribedSubscribers = subs
1042 , coincidenceSubscribedOuter = subOuter
1862 , coincidenceSubscribedOuter = subOuter
1043− , coincidenceSubscribedOuterParent = outerSubd
1863+ , coincidenceSubscribedOuterParent = outerSubscription
1044 , coincidenceSubscribedInnerParent = innerSubdRef
1864 , coincidenceSubscribedInnerParent = innerSubdRef
1865+ , coincidenceSubscribedWeakSelf = weakSelf
1045#ifdef DEBUG_NODEIDS
1866#ifdef DEBUG_NODEIDS
1046− , coincidenceSubscribedNodeId = unsafeNodeId c
1867+ , coincidenceSubscribedNodeId = nid
1049− liftIO $ writeIORef subscribedRef subscribed
1870+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "CoincidenceSubscribed"
1871+ liftIO $ writeIORef subscribedRef $! subscribed
1050 liftIO $ writeIORef (coincidenceSubscribed c) $ Just subscribed
1872 liftIO $ writeIORef (coincidenceSubscribed c) $ Just subscribed
1051− return subscribed
1873+ return (slnForSub, subscribed, occ)
1875+cleanupCoincidenceSubscribed :: CoincidenceSubscribed x a -> IO ()
1876+cleanupCoincidenceSubscribed subscribed = do
1877+ unsubscribe $ coincidenceSubscribedOuterParent subscribed
1878+ writeIORef (coincidenceSubscribedCachedSubscribed subscribed) Nothing
1880+{-# INLINE subscribeCoincidenceSubscribed #-}
1881+subscribeCoincidenceSubscribed :: CoincidenceSubscribed x a -> Subscriber x a -> IO WeakBagTicket
1882+subscribeCoincidenceSubscribed subscribed sub = WeakBag.insert sub (coincidenceSubscribedSubscribers subscribed) (coincidenceSubscribedWeakSelf subscribed) cleanupCoincidenceSubscribed
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)
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)
1896+{-# INLINE [1] 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
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
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
1920+ liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1921+ return (maybeToList (unMergeSubscribedParent <$> mOldSubd) ++ subscriptionsToKill, newPs)
1922+ foldM f ([], oldParents) $ DMap.toList p
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
1936+ destroy :: MergeDestroyFunc k (MergeSubscribedParent x)
1937+ destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParent sub) -> unsubscribe sub
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
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
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
1963+ oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $
1964+ _mergeSubscribedParentWithMove_subscription parent
1966+ liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1967+ return $ Just $ _mergeSubscribedParentWithMove_subscription parent
1969+ liftIO $ writeIORef (_mergeSubscribedParentWithMove_key parent) $! toKey
1971+ toDelete <- fmap catMaybes $ mapM (\(_ :=> v) -> getConstant v) $ DMap.toList $
1972+ DMap.intersectionWithKey moveOrDelete (unPatchDMapWithMove p) oldParents
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
1988+ destroy :: MergeDestroyFunc k (MergeSubscribedParentWithMove x k)
1989+ destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParentWithMove sub _) -> unsubscribe sub
1991+type MergeUpdateFunc k v x p s
1992+ = (forall a. EventM x (k a) -> Subscriber x (v a))
1996+ -> EventM x ([EventSubscription x], DMap k s)
1998+type MergeGetSubscription x s = forall a. s a -> EventSubscription x
2000+type MergeInitFunc k v q x s
2002+ -> (forall a. EventM x (k a) -> Subscriber x (v a))
2003+ -> EventM x (DMap k v, [Height], DMap k s)
2005+type MergeDestroyFunc k s
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))
2017+invalidateMergeHeight :: Merge x k v s -> IO ()
2018+invalidateMergeHeight m = invalidateMergeHeight' (_merge_heightRef m) (_merge_sub m)
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
2028+revalidateMergeHeight :: Merge x k v s -> IO ()
2029+revalidateMergeHeight m = do
2030+ currentHeight <- readIORef $ _merge_heightRef m
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
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"
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
2055+checkCycle :: HasSpiderTimeline x => EventSubscribed x -> EventM x ()
2056+checkCycle subscribed = liftIO $ do
2057+ height <- readIORef (eventSubscribedHeightRef subscribed)
2059+ -- currentHeight <- getCurrentHeight
2060+ -- when (height <= currentHeight) $ if height /= invalidHeight
2062+ -- myStack <- liftIO $ whoCreatedIORef undefined --TODO
2063+ -- error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
2065+ when (height == invalidHeight) $
2068+ nodesInvolvedInCycle <- walkInvalidHeightParents subscribed
2069+ stacks <- forM nodesInvolvedInCycle whoCreatedEventSubscribed
2070+ throwIO (EventLoopException stacks)
2072+ throwIO EventLoopException
1053−merge :: GCompare k => DMap k Event -> Event (DMap k Identity)
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)
1054−merge m = EventMerge $ Merge
2077+mergeSubscriber subscribed m getKey = Subscriber
1055− { mergeParents = m
2078+ { subscriberPropagate = \a -> do
1056− , mergeSubscribed = unsafeNewIORef m Nothing
2079+ oldM <- liftIO $ readIORef $ _merge_accumRef m
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
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
1059−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
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"
2117+ let subscribed = EventSubscribed
2118+ { eventSubscribedHeightRef = heightRef
2119+ , eventSubscribedRetained = toAny (parentsRef, changeSubdRef)
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
2130+ { _merge_parentsRef = parentsRef
2131+ , _merge_heightBagRef = heightBagRef
2132+ , _merge_heightRef = heightRef
2134+ , _merge_accumRef = accumRef
2136+ (dm, heights, initialParentState) <- getInitialSubscribers initialParents $ mergeSubscriber subscribed m
2137+ let myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
2138+ myHeight = if invalidHeight `elem` heights
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)
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 ()
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
2166+ return (EventSubscription unsubscribeAll subscribed, occ)
2169+mergeInt :: forall x a. (HasSpiderTimeline x) => DynamicS x (PatchIntMap (Event x a)) -> Event x (IntMap a)
2170+mergeInt = cacheEvent . mergeIntCheap
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)
2185+ , eventSubscribedGetParents = fmap (_eventSubscription_subscribed . snd) <$> FastMutableIntMap.toList parents
2186+ , eventSubscribedHasOwnHeightRef = False
2187+ , eventSubscribedWhoCreated = whoCreatedIORef heightRef
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
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
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
2219+ , subscriberRecalculateHeight = \new -> do
2220+ modifyIORef' heightBagRef $ heightBagAdd new
2221+ recalculateMyHeight
2223+ forM_ (IntMap.toList initialParents) $ \(k, p) -> do
2224+ (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead p $ mySubscriber k
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
2232+ modifyIORef' heightBagRef $ heightBagAdd height
2233+ modifyIORef' heightRef $ \oldHeight ->
2234+ if oldHeight == 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
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
2246+ defer $ SomeMergeInit $ do
2247+ let updateMe a = SomeMergeUpdate u invalidateMyHeight recalculateMyHeight
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
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"
2267+ , subscriberInvalidateHeight = \_ -> return ()
2268+ , subscriberRecalculateHeight = \_ -> return ()
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
2279+ return (EventSubscription unsubscribeAll subscribed, occ)
1061−fan :: GCompare k => Event (DMap k Identity) -> EventSelector k
2281+newtype EventSelector x k = EventSelector { select :: forall a. k a -> Event x a }
1062−fan e =
2282+newtype EventSelectorG x k v = EventSelectorG { selectG :: forall a. k a -> Event x (v a) }
2284+fanG :: (HasSpiderTimeline x, GCompare k) => Event x (DMap k v) -> EventSelectorG x k v
2285+fanG e = unsafePerformIO $ do
2286+ ref <- newIORef Nothing
1063 let f = Fan
2287 let f = Fan
1064 { fanParent = e
2288 { fanParent = e
1065− , fanSubscribed = unsafeNewIORef e Nothing
2289+ , fanSubscribed = ref
1067− in EventSelector $ \k -> EventFan k f
2291+ pure $ EventSelectorG $ \k -> eventFan k f
1069−-- | Run an event action outside of a frame
2293+runHoldInits :: HasSpiderTimeline x => IORef [SomeHoldInit x] -> IORef [SomeDynInit x] -> IORef [SomeMergeInit x] -> EventM x ()
1070−runFrame :: EventM a -> IO a
2294+runHoldInits holdInitRef dynInitRef mergeInitRef = do
1071−runFrame a = do
2295+ holdInits <- liftIO $ readIORef holdInitRef
2296+ dynInits <- liftIO $ readIORef dynInitRef
2297+ mergeInits <- liftIO $ readIORef mergeInitRef
2298+ unless (null holdInits && null dynInits && null mergeInits) $ do
2299+ liftIO $ writeIORef holdInitRef []
2300+ liftIO $ writeIORef dynInitRef []
2301+ liftIO $ writeIORef mergeInitRef []
2302+ mapM_ initHold holdInits
2303+ mapM_ initDyn dynInits
2304+ mapM_ unSomeMergeInit mergeInits
2305+ runHoldInits holdInitRef dynInitRef mergeInitRef
2307+initHold :: HasSpiderTimeline x => SomeHoldInit x -> EventM x ()
2308+initHold (SomeHoldInit h) = void $ getHoldEventSubscription h
2310+initDyn :: HasSpiderTimeline x => SomeDynInit x -> EventM x ()
2311+initDyn (SomeDynInit d) = void $ getDynHold d
2313+newEventEnv :: IO (EventEnv x)
1072 toAssignRef <- newIORef [] -- This should only actually get used when events are firing
2315 toAssignRef <- newIORef [] -- This should only actually get used when events are firing
1073 holdInitRef <- newIORef []
2316 holdInitRef <- newIORef []
1074− heightRef <- newIORef 0
2317+ dynInitRef <- newIORef []
2318+ mergeUpdateRef <- newIORef []
2319+ mergeInitRef <- newIORef []
2320+ heightRef <- newIORef zeroHeight
1075 toClearRef <- newIORef []
2321 toClearRef <- newIORef []
2322+ toClearIntRef <- newIORef []
1076 toClearRootRef <- newIORef []
2323 toClearRootRef <- newIORef []
1077 coincidenceInfosRef <- newIORef []
2324 coincidenceInfosRef <- newIORef []
1078− delayedRef <- liftIO $ newIORef IntMap.empty
2325+ delayedRef <- newIORef IntMap.empty
1079− result <- flip runEventM (EventEnv toAssignRef holdInitRef toClearRef toClearRootRef heightRef coincidenceInfosRef delayedRef) $ do
2326+ return $ EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef
1081− let runHoldInits = do
2328+clearEventEnv :: EventEnv x -> IO ()
1082− holdInits <- liftIO $ readIORef holdInitRef
2329+clearEventEnv (EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef) = do
1083− if null holdInits then return () else do
2330+ writeIORef toAssignRef []
1084− liftIO $ writeIORef holdInitRef []
2331+ writeIORef holdInitRef []
1085− forM_ holdInits $ \(SomeHoldInit e h) -> subscribeHold e h
2332+ writeIORef dynInitRef []
1086− runHoldInits
2333+ writeIORef mergeUpdateRef []
1087− runHoldInits -- This must happen before doing the assignments, in case subscribing a Hold causes existing Holds to be read by the newly-propagated events
2334+ writeIORef mergeInitRef []
1088− return result
2335+ writeIORef heightRef zeroHeight
1089− toClear <- readIORef toClearRef
2336+ writeIORef toClearRef []
1090− forM_ toClear $ \(SomeMaybeIORef ref) -> writeIORef ref Nothing
2337+ writeIORef toClearIntRef []
1091− toClearRoot <- readIORef toClearRootRef
2338+ writeIORef toClearRootRef []
1092− forM_ toClearRoot $ \(SomeDMapIORef ref) -> writeIORef ref DMap.empty
2339+ writeIORef coincidenceInfosRef []
1093− toAssign <- readIORef toAssignRef
2340+ writeIORef delayedRef IntMap.empty
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)
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
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
1094 toReconnectRef <- newIORef []
2358 toReconnectRef <- newIORef []
1095− forM_ toAssign $ \(SomeAssignment h v) -> do
2359+ coincidenceInfos <- readIORef $ eventEnvResetCoincidences env
1096− writeIORef (holdValue h) v
2360+ forM_ toAssign $ \(SomeAssignment vRef iRef v) -> {-# SCC "assignment" #-} do
1097− writeIORef (holdInvalidators h) =<< invalidate toReconnectRef =<< readIORef (holdInvalidators h)
2361+ writeIORef vRef v
1098− coincidenceInfos <- readIORef coincidenceInfosRef
2362+ traceInvalidate $ "Invalidating Hold"
1099− forM_ coincidenceInfos $ \(SomeCoincidenceInfo wsubInner subInner mcs) -> do
2363+ writeIORef iRef =<< evaluate =<< invalidate toReconnectRef =<< readIORef iRef
1100− touch subInner
2364+ mergeUpdates <- readIORef $ eventEnvMergeUpdates env
1101− finalize wsubInner
2365+ writeIORef (eventEnvMergeUpdates env) []
1102− mapM_ invalidateCoincidenceHeight mcs
2366+ tracePropagate (Proxy::Proxy x) $ "Updating merges"
2367+ mergeSubscriptionsToKill <- runEventM $ concat <$> mapM _someMergeUpdate_update mergeUpdates
2368+ tracePropagate (Proxy::Proxy x) $ "Updating merges done"
1103 toReconnect <- readIORef toReconnectRef
2369 toReconnect <- readIORef toReconnectRef
1104− forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> do
2370+ clearEventEnv env
1105− wsub <- readIORef $ switchSubscribedSelfWeak subscribed
2371+ switchSubscriptionsToKill <- forM toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
1106− finalize wsub
2372+ oldSubscription <- readIORef $ switchSubscribedCurrentParent subscribed
1107 wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
2373 wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
2374+ traceInvalidate $ "Finalizing invalidator for Switch" <> showNodeId subscribed
1108 finalize wi
2375 finalize wi
1109− let !i = switchSubscribedOwnInvalidator subscribed
2376+ i <- evaluate $ switchSubscribedOwnInvalidator subscribed
1110 wi' <- mkWeakPtrWithDebug i "wi'"
2377 wi' <- mkWeakPtrWithDebug i "wi'"
2378+ writeIORef (switchSubscribedOwnWeakInvalidator subscribed) $! wi'
1111 writeIORef (switchSubscribedBehaviorParents subscribed) []
2379 writeIORef (switchSubscribedBehaviorParents subscribed) []
1112− e <- runBehaviorM (readBehaviorTracked (switchSubscribedParent subscribed)) (Just (wi', switchSubscribedBehaviorParents subscribed))
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
1113 --TODO: Make sure we touch the pieces of the SwitchSubscribed at the appropriate times
2383 --TODO: Make sure we touch the pieces of the SwitchSubscribed at the appropriate times
1114− let !sub = switchSubscribedSelf subscribed -- Must be done strictly, or the weak pointer will refer to a useless thunk
2384+ sub <- newSubscriberSwitch subscribed
1115− wsub' <- mkWeakPtrWithDebug sub "wsub'"
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
1116− writeIORef (switchSubscribedSelfWeak subscribed) wsub'
1117− subd' <- runFrame $ subscribe e $ WeakSubscriberSimple wsub' --TODO: Assert that the event isn't firing --TODO: This should not loop because none of the events should be firing, but still, it is inefficient
1119− stackTrace <- liftIO $ liftM renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
2387+ stackTrace <- liftIO $ fmap renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
1120− liftIO $ putStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
2388+ liftIO $ debugStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
1121 EventRoot _ -> "EventRoot"
2389 EventRoot _ -> "EventRoot"
1122 EventNever -> "EventNever"
2390 EventNever -> "EventNever"
1123 _ -> "something else"
2391 _ -> "something else"
1125− writeIORef (switchSubscribedCurrentParent subscribed) subd'
2393+ writeIORef (switchSubscribedCurrentParent subscribed) $! subscription
1126− parentHeight <- readIORef $ eventSubscribedHeightRef subd'
2394+ return oldSubscription
2395+ liftIO $ mapM_ unsubscribe mergeSubscriptionsToKill
2396+ liftIO $ mapM_ unsubscribe switchSubscriptionsToKill
2397+ forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
2398+ EventSubscription _ subd' <- readIORef $ switchSubscribedCurrentParent subscribed
2399+ parentHeight <- getEventSubscribedHeight subd'
1127 myHeight <- readIORef $ switchSubscribedHeight subscribed
2400 myHeight <- readIORef $ switchSubscribedHeight subscribed
1128− if parentHeight == myHeight then return () else do
2401+ when (parentHeight /= myHeight) $ do
1129− writeIORef (switchSubscribedHeight subscribed) parentHeight
2402+ writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
1130− mapM_ invalidateSubscriberHeight =<< readIORef (switchSubscribedSubscribers subscribed)
2403+ WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
1131− forM_ coincidenceInfos $ \(SomeCoincidenceInfo _ _ mcs) -> mapM_ recalculateCoincidenceHeight mcs
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
2405+ forM_ coincidenceInfos $ \(SomeResetCoincidence subscription mcs) -> do
2406+ unsubscribe subscription
2407+ mapM_ invalidateCoincidenceHeight mcs
2408+ forM_ coincidenceInfos $ \(SomeResetCoincidence _ mcs) -> mapM_ recalculateCoincidenceHeight mcs
2409+ mapM_ _someMergeUpdate_recalculateHeight mergeUpdates
1132 forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> do
2410 forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> do
1133− mapM_ recalculateSubscriberHeight =<< readIORef (switchSubscribedSubscribers subscribed)
2411+ height <- calculateSwitchHeight subscribed
2412+ updateSwitchHeight height subscribed
1134 return result
2413 return result
1136−invalidHeight :: Int
2415+newtype Height = Height { unHeight :: Int } deriving (Show, Read, Eq, Ord, Bounded)
1137−invalidHeight = -1000
2416+
1138−
2417+{-# INLINE zeroHeight #-}
1139−invalidateSubscriberHeight :: WeakSubscriber a -> IO ()
2418+zeroHeight :: Height
1140−invalidateSubscriberHeight ws = do
2419+zeroHeight = Height 0
1141− ms <- deRefWeakSubscriber ws
2420+
1142− case ms of
2421+{-# INLINE invalidHeight #-}
1143− Nothing -> return () --TODO: cleanup?
2422+invalidHeight :: Height
1144− Just s -> case s of
2423+invalidHeight = Height (-1000)
1145− SubscriberPush _ subscribed -> do
2424+
1146− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
2425+#ifdef DEBUG_CYCLES
1147− mapM_ invalidateSubscriberHeight =<< readIORef (pushSubscribedSubscribers subscribed)
2426+-- | An invalid height that is currently being traversed, e.g. by walkInvalidHeightParents
1148− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
2427+{-# INLINE invalidHeightBeingTraversed #-}
1149− SubscriberMerge _ subscribed -> do
2428+invalidHeightBeingTraversed :: Height
1150− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
2429+invalidHeightBeingTraversed = Height (-1001)
1151− oldHeight <- readIORef $ mergeSubscribedHeight subscribed
2430+#endif
1152− when (oldHeight /= invalidHeight) $ do
2431+
1153− writeIORef (mergeSubscribedHeight subscribed) $ invalidHeight
2432+{-# INLINE succHeight #-}
1154− mapM_ invalidateSubscriberHeight =<< readIORef (mergeSubscribedSubscribers subscribed)
2433+succHeight :: Height -> Height
1155− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
2434+succHeight h@(Height a) =
1156− SubscriberFan subscribed -> do
2435+ if h == invalidHeight
1157− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
2436+ then invalidHeight
1158− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
2437+ else Height $ succ a
1159− forM_ (DMap.toList subscribers) $ ((\(FanSubscriberKey _ :=> Identity v) -> mapM_ invalidateSubscriberHeight v) :: DSum (FanSubscriberKey k) Identity -> IO ())
2438+
1160− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
2439+invalidateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
1161− SubscriberHold _ -> return ()
1162− SubscriberSwitch subscribed -> do
1163− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
1164− oldHeight <- readIORef $ switchSubscribedHeight subscribed
1165− when (oldHeight /= invalidHeight) $ do
1166− writeIORef (switchSubscribedHeight subscribed) $ invalidHeight
1167− mapM_ invalidateSubscriberHeight =<< readIORef (switchSubscribedSubscribers subscribed)
1168− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
1169− SubscriberCoincidenceOuter subscribed -> do
1170− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
1171− invalidateCoincidenceHeight subscribed
1172− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
1173− SubscriberCoincidenceInner subscribed -> do
1174− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
1175− invalidateCoincidenceHeight subscribed
1176− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
1178−invalidateCoincidenceHeight :: CoincidenceSubscribed a -> IO ()
1179invalidateCoincidenceHeight subscribed = do
2440invalidateCoincidenceHeight subscribed = do
1180 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
2441 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
1181 when (oldHeight /= invalidHeight) $ do
2442 when (oldHeight /= invalidHeight) $ do
1182− writeIORef (coincidenceSubscribedHeight subscribed) $ invalidHeight
2443+ writeIORef (coincidenceSubscribedHeight subscribed) $! invalidHeight
1183− mapM_ invalidateSubscriberHeight =<< readIORef (coincidenceSubscribedSubscribers subscribed)
2444+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1185−--TODO: The recalculation algorithm seems a bit funky; make sure it doesn't miss stuff or hit stuff twice; also, it should probably be lazy
2446+updateSwitchHeight :: Height -> SwitchSubscribed x a -> IO ()
1186−
2447+updateSwitchHeight new subscribed = do
1187−recalculateSubscriberHeight :: WeakSubscriber a -> IO ()
2448+ oldHeight <- readIORef $ switchSubscribedHeight subscribed
1188−recalculateSubscriberHeight ws = do
2449+ when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
1189− ms <- deRefWeakSubscriber ws
2450+ when (new /= invalidHeight) $ do --TODO: This 'when' should probably be an assertion
1190− case ms of
2451+ writeIORef (switchSubscribedHeight subscribed) $! new
1191− Nothing -> return () --TODO: cleanup?
2452+ WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
1192− Just s -> case s of
2453+
1193− SubscriberPush _ subscribed -> do
2454+recalculateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
1194− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
1195− mapM_ recalculateSubscriberHeight =<< readIORef (pushSubscribedSubscribers subscribed)
1196− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
1197− SubscriberMerge _ subscribed -> do
1198− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
1199− oldHeight <- readIORef $ mergeSubscribedHeight subscribed
1200− when (oldHeight == invalidHeight) $ do
1201− height <- calculateMergeHeight subscribed
1202− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
1203− when (height /= invalidHeight) $ do -- If height == invalidHeight, that means some of the prereqs have not yet been recomputed; when they do recompute, they'll catch this node again --TODO: this is O(n*m), where n is the number of children of this noe and m is the number that have been invalidated
1204− writeIORef (mergeSubscribedHeight subscribed) height
1205− mapM_ recalculateSubscriberHeight =<< readIORef (mergeSubscribedSubscribers subscribed)
1206− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
1207− SubscriberFan subscribed -> do
1208− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
1209− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1210− forM_ (DMap.toList subscribers) $ ((\(FanSubscriberKey _ :=> Identity v) -> mapM_ recalculateSubscriberHeight v) :: DSum (FanSubscriberKey k) Identity -> IO ())
1211− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
1212− SubscriberHold _ -> return ()
1213− SubscriberSwitch subscribed -> do
1214− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
1215− oldHeight <- readIORef $ switchSubscribedHeight subscribed
1216− when (oldHeight == invalidHeight) $ do
1217− height <- calculateSwitchHeight subscribed
1218− when (height /= invalidHeight) $ do
1219− writeIORef (switchSubscribedHeight subscribed) height
1220− mapM_ recalculateSubscriberHeight =<< readIORef (switchSubscribedSubscribers subscribed)
1221− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
1222− SubscriberCoincidenceOuter subscribed -> do
1223− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
1224− void $ recalculateCoincidenceHeight subscribed
1225− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
1226− SubscriberCoincidenceInner subscribed -> do
1227− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
1228− void $ recalculateCoincidenceHeight subscribed
1229− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
1231−recalculateCoincidenceHeight :: CoincidenceSubscribed a -> IO ()
1232recalculateCoincidenceHeight subscribed = do
2455recalculateCoincidenceHeight subscribed = do
1233 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
2456 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
1234− when (oldHeight == invalidHeight) $ do
2457+ when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
1235 height <- calculateCoincidenceHeight subscribed
2458 height <- calculateCoincidenceHeight subscribed
1236 when (height /= invalidHeight) $ do
2459 when (height /= invalidHeight) $ do
1237− writeIORef (coincidenceSubscribedHeight subscribed) height
2460+ writeIORef (coincidenceSubscribedHeight subscribed) $! height
1238− mapM_ recalculateSubscriberHeight =<< readIORef (coincidenceSubscribedSubscribers subscribed) --TODO: This should probably be mandatory, just like with the merge and switch ones
2461+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
1240−calculateMergeHeight :: MergeSubscribed k -> IO Int
1241−calculateMergeHeight subscribed = if DMap.null (mergeSubscribedParents subscribed) then return 0 else do
1242− heights <- forM (DMap.toList $ mergeSubscribedParents subscribed) $ \(_ :=> es) -> do
1243− readIORef $ eventSubscribedHeightRef es
1244− return $ if any (== invalidHeight) heights then invalidHeight else succ $ Prelude.maximum heights --TODO: Replace 'any' with invalidHeight-preserving 'maximum'
1246−calculateSwitchHeight :: SwitchSubscribed a -> IO Int
2463+calculateSwitchHeight :: SwitchSubscribed x a -> IO Height
1247−calculateSwitchHeight subscribed = readIORef . eventSubscribedHeightRef =<< readIORef (switchSubscribedCurrentParent subscribed)
2464+calculateSwitchHeight subscribed = getEventSubscribedHeight . _eventSubscription_subscribed =<< readIORef (switchSubscribedCurrentParent subscribed)
1249−calculateCoincidenceHeight :: CoincidenceSubscribed a -> IO Int
2466+calculateCoincidenceHeight :: CoincidenceSubscribed x a -> IO Height
1250calculateCoincidenceHeight subscribed = do
2467calculateCoincidenceHeight subscribed = do
1251− outerHeight <- readIORef $ eventSubscribedHeightRef $ coincidenceSubscribedOuterParent subscribed
2468+ outerHeight <- getEventSubscribedHeight $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
1252− innerHeight <- maybe (return 0) (readIORef . eventSubscribedHeightRef) =<< readIORef (coincidenceSubscribedInnerParent subscribed)
2469+ innerHeight <- maybe (return zeroHeight) getEventSubscribedHeight =<< readIORef (coincidenceSubscribedInnerParent subscribed)
1253 return $ if outerHeight == invalidHeight || innerHeight == invalidHeight then invalidHeight else max outerHeight innerHeight
2470 return $ if outerHeight == invalidHeight || innerHeight == invalidHeight then invalidHeight else max outerHeight innerHeight
1255−{-
2472+data SomeSwitchSubscribed x = forall a. SomeSwitchSubscribed {-# NOUNPACK #-} (SwitchSubscribed x a)
1256−recalculateEventSubscribedHeight :: EventSubscribed a -> IO Int
1257−recalculateEventSubscribedHeight es = case es of
1258− EventSubscribedRoot _ -> return 0
1259− EventSubscribedNever -> return 0
1260− EventSubscribedPush subscribed -> recalculateEventSubscribedHeight $ pushSubscribedParent subscribed
1261− EventSubscribedMerge subscribed -> do
1262− oldHeight <- readIORef $ mergeSubscribedHeight subscribed
1263− if oldHeight /= invalidHeight then return oldHeight else do
1264− height <- calculateMergeHeight subscribed
1265− writeIORef (mergeSubscribedHeight subscribed) height
1267− EventSubscribedFan _ subscribed -> recalculateEventSubscribedHeight $ fanSubscribedParent subscribed
1268− EventSubscribedSwitch subscribed -> do
1269− oldHeight <- readIORef $ switchSubscribedHeight subscribed
1270− if oldHeight /= invalidHeight then return oldHeight else do
1271− height <- calculateSwitchHeight subscribed
1272− writeIORef (switchSubscribedHeight subscribed) height
1274− EventSubscribedCoincidence subscribed -> recalculateCoincidenceHeight subscribed
1277−data SomeSwitchSubscribed = forall a. SomeSwitchSubscribed (SwitchSubscribed a)
1279−debugInvalidate :: Bool
2474+invalidate :: IORef [SomeSwitchSubscribed x] -> WeakList (Invalidator x) -> IO (WeakList (Invalidator x))
1280−debugInvalidate = False
1282−invalidate :: IORef [SomeSwitchSubscribed] -> WeakList Invalidator -> IO (WeakList Invalidator)
1283invalidate toReconnectRef wis = do
2475invalidate toReconnectRef wis = do
1284 forM_ wis $ \wi -> do
2476 forM_ wis $ \wi -> do
1285 mi <- deRefWeak wi
2477 mi <- deRefWeak wi
1286 case mi of
2478 case mi of
1287 Nothing -> do
2479 Nothing -> do
1288− when debugInvalidate $ liftIO $ putStrLn "invalidate Dead"
2480+ traceInvalidate "invalidate Dead"
1289 return () --TODO: Should we clean this up here?
2481 return () --TODO: Should we clean this up here?
1290 Just i -> do
2482 Just i -> do
1291 finalize wi -- Once something's invalidated, it doesn't need to hang around; this will change when some things are strict
2483 finalize wi -- Once something's invalidated, it doesn't need to hang around; this will change when some things are strict
1292 case i of
2484 case i of
1293 InvalidatorPull p -> do
2485 InvalidatorPull p -> do
1294− when debugInvalidate $ liftIO $ putStrLn "invalidate Pull"
2486+ traceInvalidate $ "invalidate: Pull" <> showNodeId p
1295 mVal <- readIORef $ pullValue p
2487 mVal <- readIORef $ pullValue p
1296 forM_ mVal $ \val -> do
2488 forM_ mVal $ \val -> do
1297 writeIORef (pullValue p) Nothing
2489 writeIORef (pullValue p) Nothing
1298− writeIORef (pullSubscribedInvalidators val) =<< invalidate toReconnectRef =<< readIORef (pullSubscribedInvalidators val)
2490+ writeIORef (pullSubscribedInvalidators val) =<< evaluate =<< invalidate toReconnectRef =<< readIORef (pullSubscribedInvalidators val)
1299 InvalidatorSwitch subscribed -> do
2491 InvalidatorSwitch subscribed -> do
1300− when debugInvalidate $ liftIO $ putStrLn "invalidate Switch"
2492+ traceInvalidate $ "invalidate: Switch" <> showNodeId subscribed
1301 modifyIORef' toReconnectRef (SomeSwitchSubscribed subscribed :)
2493 modifyIORef' toReconnectRef (SomeSwitchSubscribed subscribed :)
1302 return [] -- Since we always finalize everything, always return an empty list --TODO: There are some things that will need to be re-subscribed every time; we should try to avoid finalizing them
2494 return [] -- Since we always finalize everything, always return an empty list --TODO: There are some things that will need to be re-subscribed every time; we should try to avoid finalizing them
@@ -1305,90 +2497,396 @@ invalidate toReconnectRef wis = do
1305-- Reflex integration
2497-- Reflex integration
1306--------------------------------------------------------------------------------
2498--------------------------------------------------------------------------------
1308−data Spider
2500+-- | Designates the default, global Spider timeline
1309−
2501+data SpiderTimeline x
1310−instance R.Reflex Spider where
2502+type role SpiderTimeline nominal
1311− newtype Behavior Spider a = SpiderBehavior { unSpiderBehavior :: Behavior a }
2503+
1312− newtype Event Spider a = SpiderEvent { unSpiderEvent :: Event a }
2504+-- | The default, global Spider environment
1313− type PullM Spider = BehaviorM
2505+type Spider = SpiderTimeline Global
1314− type PushM Spider = EventM
2506+
1315− {-# INLINE never #-}
2507+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (EventM x) where
1316− {-# INLINE constant #-}
2508+ {-# INLINABLE sample #-}
1317− never = SpiderEvent EventNever
2509+ sample (SpiderBehavior b) = readBehaviorUntracked b
1318− constant = SpiderBehavior . BehaviorConst
2510+
1319− push f = SpiderEvent. push f . unSpiderEvent
2511+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (EventM x) where
1320− pull = SpiderBehavior . pull
2512+ {-# INLINABLE hold #-}
1321− merge = SpiderEvent . merge . (unsafeCoerce :: DMap k (R.Event Spider) -> DMap k Event)
2513+ hold = holdSpiderEventM
1322− fan e = R.EventSelector $ SpiderEvent . select (fan (unSpiderEvent e))
2514+ {-# INLINABLE holdDyn #-}
1323− switch = SpiderEvent . switch . (unsafeCoerce :: Behavior (R.Event Spider a) -> Behavior (Event a)) . unSpiderBehavior
2515+ holdDyn = holdDynSpiderEventM
1324− coincidence = SpiderEvent . coincidence . (unsafeCoerce :: Event (R.Event Spider a) -> Event (Event a)) . unSpiderEvent
2516+ {-# INLINABLE holdIncremental #-}
1325−
2517+ holdIncremental = holdIncrementalSpiderEventM
1326−instance R.MonadSample Spider SpiderHost where
2518+ {-# INLINABLE buildDynamic #-}
1327− {-# INLINE sample #-}
2519+ buildDynamic = buildDynamicSpiderEventM
1328− sample = SpiderHost . readBehavior . unSpiderBehavior
2520+ {-# INLINABLE headE #-}
1329−
2521+ headE = R.slowHeadE
1330−instance R.MonadHold Spider SpiderHost where
2522+-- headE (SpiderEvent e) = SpiderEvent <$> Reflex.Spider.Internal.headE e
1331− hold v0 = SpiderHost . liftM SpiderBehavior . runFrame . hold v0 . unSpiderEvent
2523+ {-# INLINABLE now #-}
1332−
2524+ now = nowSpiderEventM
1333−instance R.MonadSample Spider BehaviorM where
2525+
1334− {-# INLINE sample #-}
2526+instance Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPullM x) where
1335− sample = readBehaviorTracked . unSpiderBehavior
2527+ {-# INLINABLE sample #-}
1336−
2528+ sample = coerce . readBehaviorTracked . unSpiderBehavior
1337−instance R.MonadSample Spider EventM where
2529+
1338− {-# INLINE sample #-}
2530+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPushM x) where
1339− sample = liftIO . readBehavior . unSpiderBehavior
2531+ {-# INLINABLE sample #-}
1340−
2532+ sample (SpiderBehavior b) = SpiderPushM $ readBehaviorUntracked b
1341−instance R.MonadHold Spider EventM where
2533+
1342− {-# INLINE hold #-}
2534+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderPushM x) where
1343− hold v0 e = SpiderBehavior <$> hold v0 (unSpiderEvent e)
2535+ {-# INLINABLE hold #-}
1344−
2536+ hold v0 e = Reflex.Class.current <$> Reflex.Class.holdDyn v0 e
1345−data RootTrigger a = forall k. GCompare k => RootTrigger (IORef [WeakSubscriber a], IORef (DMap k Identity), k a)
2537+ {-# INLINABLE holdDyn #-}
1346−newtype SpiderEventHandle a = SpiderEventHandle { unEventHandle :: Event a }
2538+ holdDyn v0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce e
1347−
2539+ {-# INLINABLE holdIncremental #-}
1348−instance R.MonadSubscribeEvent Spider SpiderHostFrame where
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
2550+instance HasSpiderTimeline x => Monad (Reflex.Class.Dynamic (SpiderTimeline x)) where
2551+ {-# INLINE return #-}
2553+ {-# INLINE (>>=) #-}
2554+ x >>= f = SpiderDynamic $ dynamicDynIdentity $ newJoinDyn $ newMapDyn (unSpiderDynamic . f) $ unSpiderDynamic x
2555+ {-# INLINE (>>) #-}
2557+#if !MIN_VERSION_base(4,13,0)
2558+ {-# INLINE fail #-}
2559+ fail _ = error "Dynamic does not support 'fail'"
2562+{-# INLINABLE newJoinDyn #-}
2563+newJoinDyn :: HasSpiderTimeline x => DynamicS x (Identity (DynamicS x (Identity a))) -> Reflex.Spider.Internal.Dyn x (Identity a)
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'
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
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 #-}
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)
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
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
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
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
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
2601+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderHost x) where
2602+ {-# INLINABLE hold #-}
2603+ hold v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.hold v0 e
2604+ {-# INLINABLE holdDyn #-}
2605+ holdDyn v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.holdDyn v0 e
2606+ {-# INLINABLE holdIncremental #-}
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
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
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
2634+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHost x) where
2635+ {-# INLINABLE sample #-}
2636+ sample = runFrame . readBehaviorUntracked . unSpiderBehavior
2638+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2639+ {-# INLINABLE sample #-}
2640+ sample = Reflex.Spider.Internal.ReadPhase . Reflex.Class.sample
2642+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2643+ {-# INLINABLE hold #-}
2644+ hold v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.hold v0 e
2645+ {-# INLINABLE holdDyn #-}
2646+ holdDyn v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.holdDyn v0 e
2647+ {-# INLINABLE holdIncremental #-}
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
2656+--------------------------------------------------------------------------------
2658+--------------------------------------------------------------------------------
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
2664+ {-# INLINABLE subscribeEvent #-}
1349 subscribeEvent e = SpiderHostFrame $ do
2665 subscribeEvent e = SpiderHostFrame $ do
1350− _ <- getEventSubscribed $ unSpiderEvent e --TODO: The result of this should actually be used
2666+ --TODO: Unsubscribe eventually (manually and/or with weak ref)
1351− return $ SpiderEventHandle (unSpiderEvent e)
2667+ val <- liftIO $ newIORef Nothing
1352−
2668+ subscription <- subscribe (unSpiderEvent e) $ Subscriber
1353−instance R.ReflexHost Spider where
2669+ { subscriberPropagate = \a -> do
1354− type EventTrigger Spider = RootTrigger
2670+ liftIO $ writeIORef val $ Just a
1355− type EventHandle Spider = SpiderEventHandle
2671+ scheduleClear val
1356− type HostFrame Spider = SpiderHostFrame
2672+ , subscriberInvalidateHeight = \_ -> return ()
1357−
2673+ , subscriberRecalculateHeight = \_ -> return ()
1358−instance R.MonadReadEvent Spider ReadPhase where
2674+ }
1359− {-# INLINE readEvent #-}
2675+ return $ SpiderEventHandle
1360− readEvent = ReadPhase . liftM (fmap return) . readEvent . unEventHandle
2676+ { spiderEventHandleSubscription = subscription
1361−
2677+ , spiderEventHandleValue = val
1362−instance MonadRef EventM where
2678+ }
1363− type Ref EventM = Ref IO
2679+
1364− {-# INLINE newRef #-}
2680+instance HasSpiderTimeline x => Reflex.Host.Class.ReflexHost (SpiderTimeline x) where
1365− {-# INLINE readRef #-}
2681+ type EventTrigger (SpiderTimeline x) = RootTrigger x
1366− {-# INLINE writeRef #-}
2682+ type EventHandle (SpiderTimeline x) = SpiderEventHandle x
2683+ type HostFrame (SpiderTimeline x) = SpiderHostFrame x
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
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
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
2704+instance HasSpiderTimeline x => Reflex.Host.Class.MonadSubscribeEvent (SpiderTimeline x) (SpiderHost x) where
2705+ {-# INLINABLE subscribeEvent #-}
2706+ subscribeEvent = runFrame . runSpiderHostFrame . Reflex.Host.Class.subscribeEvent
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
2713+unsafeNewSpiderTimelineEnv :: forall x. IO (SpiderTimelineEnv x)
2714+unsafeNewSpiderTimelineEnv = do
2718+ depthRef <- newIORef 0
2720+ return $ STE $ SpiderTimelineEnv
2721+ { _spiderTimeline_lock = lock
2722+ , _spiderTimeline_eventEnv = env
2724+ , _spiderTimeline_depth = depthRef
2728+-- | Create a new SpiderTimelineEnv
2729+newSpiderTimeline :: IO (Some SpiderTimelineEnv)
2730+newSpiderTimeline = withSpiderTimeline (pure . Some)
2732+data LocalSpiderTimeline (x :: Type) s
2734+instance Reifies s (SpiderTimelineEnv x) =>
2735+ HasSpiderTimeline (LocalSpiderTimeline x s) where
2736+ spiderTimeline = localSpiderTimeline Proxy $ reflect (Proxy :: Proxy s)
2740+ -> SpiderTimelineEnv x
2741+ -> SpiderTimelineEnv (LocalSpiderTimeline x s)
2742+localSpiderTimeline _ = coerce
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
2750+newtype SpiderPullM (x :: Type) a = SpiderPullM (BehaviorM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2752+type ComputeM = EventM
2754+newtype SpiderPushM (x :: Type) a = SpiderPushM (ComputeM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
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 #-}
2778+ :: forall k2 (k :: k2 -> *) q (v :: k2 -> *). GCompare k
2779+ => (forall a. q a -> R.Event (SpiderTimeline x) (v a))
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))
2816+data RootTrigger x a = forall k. GCompare k => RootTrigger (WeakBag (Subscriber x a), IORef (DMap k Identity), k a)
2818+data SpiderEventHandle x a = SpiderEventHandle
2819+ { spiderEventHandleSubscription :: EventSubscription x
2820+ , spiderEventHandleValue :: IORef (Maybe a)
2823+instance MonadRef (EventM x) where
2824+ type Ref (EventM x) = Ref IO
2825+ {-# INLINABLE newRef #-}
2826+ {-# INLINABLE readRef #-}
2827+ {-# INLINABLE writeRef #-}
1367 newRef = liftIO . newRef
2828 newRef = liftIO . newRef
1368 readRef = liftIO . readRef
2829 readRef = liftIO . readRef
1369 writeRef r a = liftIO $ writeRef r a
2830 writeRef r a = liftIO $ writeRef r a
1371−instance MonadAtomicRef EventM where
2832+instance MonadAtomicRef (EventM x) where
1372− {-# INLINE atomicModifyRef #-}
2833+ {-# INLINABLE atomicModifyRef #-}
1373 atomicModifyRef r f = liftIO $ atomicModifyRef r f
2834 atomicModifyRef r f = liftIO $ atomicModifyRef r f
1375−newtype SpiderHost a = SpiderHost { runSpiderHost :: IO a } deriving (Functor, Applicative, Monad, MonadFix, MonadIO, MonadException, MonadAsyncException)
2836+-- | The monad for actions that manipulate a Spider timeline identified by @x@
2837+newtype SpiderHost (x :: Type) a = SpiderHost { unSpiderHost :: IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2839+instance Monad (SpiderHost x) where
2840+ {-# INLINABLE (>>=) #-}
2841+ SpiderHost x >>= f = SpiderHost $ x >>= unSpiderHost . f
2842+ {-# INLINABLE (>>) #-}
2843+ SpiderHost x >> SpiderHost y = SpiderHost $ x >> y
2844+ {-# INLINABLE return #-}
2845+ return x = SpiderHost $ return x
2846+#if !MIN_VERSION_base(4,13,0)
2847+ {-# INLINABLE fail #-}
2848+ fail = MonadFail.fail
1377−newtype SpiderHostFrame a = SpiderHostFrame { runSpiderHostFrame :: EventM a } deriving (Functor, Applicative, Monad, MonadFix, MonadIO, MonadException, MonadAsyncException)
2851+instance MonadFail (SpiderHost x) where
2852+ {-# INLINABLE fail #-}
2853+ fail s = SpiderHost $ MonadFail.fail s
2855+-- | Run an action affecting the global Spider timeline; this will be guarded by
2856+-- a mutex for that timeline
2857+runSpiderHost :: SpiderHost Global a -> IO a
2858+runSpiderHost (SpiderHost a) = a
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
2865+newtype SpiderHostFrame (x :: Type) a = SpiderHostFrame { runSpiderHostFrame :: EventM x a }
2866+ deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2868+instance Monad (SpiderHostFrame x) where
2869+ {-# INLINABLE (>>=) #-}
2870+ SpiderHostFrame x >>= f = SpiderHostFrame $ x >>= runSpiderHostFrame . f
2871+ {-# INLINABLE (>>) #-}
2872+ SpiderHostFrame x >> SpiderHostFrame y = SpiderHostFrame $ x >> y
2873+ {-# INLINABLE return #-}
2874+ return x = SpiderHostFrame $ return x
2875+#if !MIN_VERSION_base(4,13,0)
2876+ {-# INLINABLE fail #-}
2877+ fail s = SpiderHostFrame $ fail s
1379−instance R.MonadSample Spider SpiderHostFrame where
2880+instance NotReady (SpiderTimeline x) (SpiderHostFrame x) where
1380− sample = SpiderHostFrame . R.sample --TODO: This can cause problems with laziness, so we should get rid of it if we can
2881+ notReadyUntil _ = pure ()
1381−
2882+ notReady = pure ()
1382−instance R.MonadHold Spider SpiderHostFrame where
1383− {-# INLINE hold #-}
1384− hold v0 e = SpiderHostFrame $ R.hold v0 e
1386−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)
1387newEventWithTriggerIO f = do
2885newEventWithTriggerIO f = do
1388 es <- newFanEventWithTriggerIO $ \Refl -> f
2886 es <- newFanEventWithTriggerIO $ \Refl -> f
1389 return $ select es Refl
2887 return $ select es Refl
1391−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)
1392newFanEventWithTriggerIO f = do
2890newFanEventWithTriggerIO f = do
1393 occRef <- newIORef DMap.empty
2891 occRef <- newIORef DMap.empty
1394 subscribedRef <- newIORef DMap.empty
2892 subscribedRef <- newIORef DMap.empty
@@ -1397,46 +2895,36 @@ newFanEventWithTriggerIO f = do
1397 , rootSubscribed = subscribedRef
2895 , rootSubscribed = subscribedRef
1398 , rootInit = f
2896 , rootInit = f
1400− return $ EventSelector $ \k -> EventRoot k r
2898+ return $ EventSelector $ \k -> eventRoot k r
1402−instance R.MonadReflexCreateTrigger Spider SpiderHost where
1403− newEventWithTrigger = SpiderHost . liftM SpiderEvent . newEventWithTriggerIO
1404− newFanEventWithTrigger f = SpiderHost $ do
1405− es <- newFanEventWithTriggerIO f
1406− return $ R.EventSelector $ SpiderEvent . select es
1408−instance R.MonadReflexCreateTrigger Spider SpiderHostFrame where
2900+newtype ReadPhase x a = ReadPhase (ResultM x a) deriving (Functor, Applicative, Monad, MonadFix)
1409− newEventWithTrigger = SpiderHostFrame . EventM . liftIO . liftM SpiderEvent . newEventWithTriggerIO
1410− newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
1411− es <- newFanEventWithTriggerIO f
1412− return $ R.EventSelector $ SpiderEvent . select es
1414−instance R.MonadSubscribeEvent Spider SpiderHost where
1415− subscribeEvent e = SpiderHost $ do
1416− _ <- runFrame $ getEventSubscribed $ unSpiderEvent e --TODO: The result of this should actually be used
1417− return $ SpiderEventHandle (unSpiderEvent e)
1419−newtype ReadPhase a = ReadPhase { runReadPhase :: ResultM a } deriving (Functor, Applicative, Monad, MonadFix, R.MonadSample Spider, R.MonadHold Spider)
1421−instance R.MonadReflexHost Spider SpiderHost where
2902+instance MonadRef (SpiderHost x) where
1422− type ReadPhase SpiderHost = ReadPhase
2903+ type Ref (SpiderHost x) = Ref IO
1423− fireEventsAndRead es (ReadPhase a) = SpiderHost $ run es a
1424− runHostFrame = SpiderHost . runFrame . runSpiderHostFrame
1426−instance MonadRef SpiderHost where
1427− type Ref SpiderHost = Ref IO
1428 newRef = SpiderHost . newRef
2904 newRef = SpiderHost . newRef
1429 readRef = SpiderHost . readRef
2905 readRef = SpiderHost . readRef
1430 writeRef r = SpiderHost . writeRef r
2906 writeRef r = SpiderHost . writeRef r
1432−instance MonadAtomicRef SpiderHost where
2908+instance MonadAtomicRef (SpiderHost x) where
1433 atomicModifyRef r = SpiderHost . atomicModifyRef r
2909 atomicModifyRef r = SpiderHost . atomicModifyRef r
1435−instance MonadRef SpiderHostFrame where
2911+instance MonadRef (SpiderHostFrame x) where
1436− type Ref SpiderHostFrame = Ref IO
2912+ type Ref (SpiderHostFrame x) = Ref IO
1437 newRef = SpiderHostFrame . newRef
2913 newRef = SpiderHostFrame . newRef
1438 readRef = SpiderHostFrame . readRef
2914 readRef = SpiderHostFrame . readRef
1439 writeRef r = SpiderHostFrame . writeRef r
2915 writeRef r = SpiderHostFrame . writeRef r
1441−instance MonadAtomicRef SpiderHostFrame where
2917+instance MonadAtomicRef (SpiderHostFrame x) where
1442 atomicModifyRef r = SpiderHostFrame . atomicModifyRef r
2918 atomicModifyRef r = SpiderHostFrame . atomicModifyRef r
2920+instance PrimMonad (SpiderHostFrame x) where
2921+ type PrimState (SpiderHostFrame x) = PrimState IO
2922+ primitive = SpiderHostFrame . EventM . primitive
2924+instance NotReady (SpiderTimeline x) (SpiderHost x) where
2925+ notReadyUntil _ = return ()
2926+ notReady = return ()
2928+instance HasSpiderTimeline x => NotReady (SpiderTimeline x) (PerformEventT (SpiderTimeline x) (SpiderHost x)) where
2929+ notReadyUntil _ = return ()
2930+ notReady = return ()