@@ -2,44 +2,56 @@
22{-# LANGUAGE CPP #-}
33{-# LANGUAGE ConstraintKinds #-}
44{-# LANGUAGE EmptyDataDecls #-}
5+{-# LANGUAGE ExistentialQuantification #-}
56{-# LANGUAGE FlexibleContexts #-}
67{-# LANGUAGE FlexibleInstances #-}
78{-# LANGUAGE FunctionalDependencies #-}
89{-# LANGUAGE GADTs #-}
910{-# LANGUAGE GeneralizedNewtypeDeriving #-}
1011{-# LANGUAGE LambdaCase #-}
11−{-# LANGUAGE MagicHash #-}
12−{-# LANGUAGE MultiParamTypeClasses #-}
13−{-# LANGUAGE MultiWayIf #-}
1412{-# LANGUAGE RankNTypes #-}
1513{-# LANGUAGE RoleAnnotations #-}
1614{-# LANGUAGE ScopedTypeVariables #-}
1715{-# LANGUAGE TypeFamilies #-}
1816{-# LANGUAGE TypeOperators #-}
1917{-# LANGUAGE UndecidableInstances #-}
18+{-# LANGUAGE PolyKinds #-}
19+{-# LANGUAGE DeriveFunctor #-}
20+{-# LANGUAGE StandaloneDeriving #-}
21+{-# LANGUAGE InstanceSigs #-}
22+{-# LANGUAGE MultiWayIf #-}
23+
24+#ifdef USE_REFLEX_OPTIMIZER
2025{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
21−#ifdef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
22−{-# OPTIONS_GHC -fno-warn-orphans #-}
2326#endif
27+{-# OPTIONS_GHC -Wunused-binds #-}
2428-- | This module is the implementation of the 'Spider' 'Reflex' engine. It uses
2529-- a graph traversal algorithm to propagate 'Event's and 'Behavior's.
26−module Reflex.Spider.Internal where
30+module Reflex.Spider.Internal (module Reflex.Spider.Internal) where
2731
28−import Control.Applicative
32+#if MIN_VERSION_base(4,10,0)
33+import Control.Applicative (liftA2)
34+#endif
2935import Control.Concurrent
3036import Control.Exception
31−import Control.Monad hiding (forM, forM_, mapM, mapM_, sequence)
37+import Control.Monad hiding (forM, forM_, mapM, mapM_)
3238import Control.Monad.Exception
33−import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_, sequence)
39+import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_)
3440import Control.Monad.Primitive
35−import Control.Monad.Reader hiding (forM, forM_, mapM, mapM_, sequence)
41+import Control.Monad.Reader.Class
42+import Control.Monad.IO.Class
43+import Control.Monad.ReaderIO
3644import Control.Monad.Ref
45+import Control.Monad.Fail (MonadFail)
46+import qualified Control.Monad.Fail as MonadFail
3747import Data.Align
3848import Data.Coerce
39−import Data.Dependent.Map (DMap, DSum (..))
49+import Data.Dependent.Map (DMap)
4050import 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
4154import Data.Foldable hiding (concat, elem, sequence_)
42−import Data.Function
4355import Data.Functor.Constant
4456import Data.Functor.Misc
4557import Data.Functor.Product
@@ -47,43 +59,75 @@ import Data.GADT.Compare
4759import Data.IntMap.Strict (IntMap)
4860import qualified Data.IntMap.Strict as IntMap
4961import Data.IORef
50−import Data.List hiding (foldl')
51−import Data.Maybe
52−import Data.Monoid ((<>))
62+import Data.Kind (Type)
63+import Data.Maybe hiding (mapMaybe)
64+import Data.Monoid (mempty, (<>))
5365import Data.Proxy
54−import Data.Some (Some)
55−import qualified Data.Some as Some
5666import Data.These
5767import Data.Traversable
58−import Data.Word
59−import GHC.Exts
68+import Data.Type.Equality ((:~:)(Refl))
69+import Data.Witherable (Filterable, mapMaybe)
70+import GHC.Exts hiding (toList)
6071import GHC.IORef (IORef (..))
6172import GHC.Stack
62−import Reflex.FunctorMaybe
73+import Reflex.FastWeak
6374import System.IO.Unsafe
6475import System.Mem.Weak
6576import Unsafe.Coerce
6677
78+#ifdef MIN_VERSION_semialign
79+#if MIN_VERSION_these(0,8,0)
80+import Data.These.Combinators (justThese)
81+#endif
82+#if MIN_VERSION_semialign(1,1,0)
83+import Data.Zip (Zip (..))
84+#endif
85+#endif
86+
6787#ifdef DEBUG_CYCLES
6888import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
89+#endif
90+
6991import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
7092import qualified Data.List.NonEmpty as NonEmpty
71−import Data.Monoid (mempty)
7293import Data.Tree (Forest, Tree (..), drawForest)
73−#endif
94+import Data.List (isPrefixOf)
7495
75−import Data.WeakBag (WeakBag, WeakBagTicket)
76−import qualified Data.WeakBag as WeakBag
77−#ifndef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
96+import Data.FastWeakBag (FastWeakBag, FastWeakBagTicket)
97+import qualified Data.FastWeakBag as FastWeakBag
98+
99+import Data.Reflection
100+import Data.Some (Some(Some))
78101import Data.Type.Coercion
102+import Data.Profunctor.Unsafe ((#.), (.#))
103+import Data.WeakBag (WeakBag, WeakBagTicket, _weakBag_children)
104+import qualified Data.WeakBag as WeakBag
79105import qualified Reflex.Class
80106import qualified Reflex.Class as R
81107import qualified Reflex.Host.Class
108+import Reflex.NotReady.Class
109+import Data.Patch
110+import qualified Data.Patch.DMapWithMove as PatchDMapWithMove
111+import Reflex.PerformEvent.Base (PerformEventT)
112+
113+#ifdef DEBUG_TRACE_EVENTS
114+import qualified Data.ByteString.Char8 as BS8
115+import System.IO (stderr)
116+import Data.List (isPrefixOf)
82117#endif
83−import Reflex.Patch
84118
85−-- Note: must come last to silence warnings due to AMP on GHC < 7.10
86−import Prelude hiding (any, concat, mapM, mapM_, sequence)
119+-- TODO stdout might not be the best channel for debug output
120+debugStrLn :: String -> IO ()
121+debugStrLn = putStrLn
122+
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"
129+
130+#endif
87131
88132debugPropagate :: Bool
89133
@@ -92,28 +136,42 @@ debugInvalidateHeight :: Bool
92136debugInvalidate :: Bool
93137
94138#ifdef DEBUG
95−
96139#define DEBUG_NODEIDS
97140
141+#ifdef DEBUG_TRACE_PROPAGATION
98142debugPropagate = True
143+#else
144+debugPropagate = False
145+#endif
99146
147+#ifdef DEBUG_TRACE_HEIGHT
148+debugInvalidateHeight = True
149+#else
100150debugInvalidateHeight = False
151+#endif
101152
153+#ifdef DEBUG_TRACE_INVALIDATION
102154debugInvalidate = True
155+#else
156+debugInvalidate = False
157+#endif
103158
104159class HasNodeId a where
105160 getNodeId :: a -> Int
106161
107−instance HasNodeId (Hold x p a) where
108− getNodeId = holdNodeId
162+instance HasNodeId (CacheSubscribed x a) where
163+ getNodeId = _cacheSubscribed_nodeId
109164
110−instance HasNodeId (PushSubscribed x a b) where
111− getNodeId = pushSubscribedNodeId
165+instance HasNodeId (FanInt x a) where
166+ getNodeId = _fanInt_nodeId
167+
168+instance HasNodeId (Hold x p) where
169+ getNodeId = holdNodeId
112170
113171instance HasNodeId (SwitchSubscribed x a) where
114172 getNodeId = switchSubscribedNodeId
115173
116−instance HasNodeId (FanSubscribed x a) where
174+instance HasNodeId (FanSubscribed x v a) where
117175 getNodeId = fanSubscribedNodeId
118176
119177instance HasNodeId (CoincidenceSubscribed x a) where
@@ -127,41 +185,16 @@ instance HasNodeId (Pull x a) where
127185
128186{-# INLINE showNodeId #-}
129187showNodeId :: HasNodeId a => a -> String
130−showNodeId = ("#"<>) . show . getNodeId
131−
132−showSubscriberType :: Subscriber x a -> String
133−showSubscriberType = \case
134− SubscriberPush _ _ -> "SubscriberPush"
135− SubscriberMerge _ _ -> "SubscriberMerge"
136− SubscriberFan _ -> "SubscriberFan"
137− SubscriberMergeChange _ -> "SubscriberMergeChange"
138− SubscriberHold _ -> "SubscriberHold"
139− SubscriberHoldIdentity _ -> "SubscriberHoldIdentity"
140− SubscriberSwitch _ -> "SubscriberSwitch"
141− SubscriberCoincidenceOuter _ -> "SubscriberCoincidenceOuter"
142− SubscriberCoincidenceInner _ -> "SubscriberCoincidenceInner"
143− SubscriberHandle -> "SubscriberHandle"
144−
145−showEventType :: Event x a -> String
146−showEventType = \case
147− EventRoot _ _ -> "EventRoot"
148− EventNever -> "EventNever"
149− EventPush _ -> "EventPush"
150− EventMerge _ -> "EventMerge"
151− EventFan _ _ -> "EventFan"
152− EventSwitch _ -> "EventSwitch"
153− EventCoincidence _ -> "EventCoincidence"
154− EventHold _ -> "EventHold"
155− EventDyn _ -> "EventDyn"
156− EventHoldIdentity _ -> "EventHoldIdentity"
157− EventDynIdentity _ -> "EventDynIdentity"
188+showNodeId = showNodeId' . getNodeId
189+
190+showNodeId' :: Int -> String
191+showNodeId' = ("#"<>) . show
192+
158193
159194#else
160195
161196debugPropagate = False
162−
163197debugInvalidateHeight = False
164−
165198debugInvalidate = False
166199
167200-- This must be inline, or error messages will cause memory leaks due to retaining the node in question
@@ -169,6 +202,10 @@ debugInvalidate = False
169202showNodeId :: a -> String
170203showNodeId _ = ""
171204
205+{-# INLINE showNodeId' #-}
206+showNodeId' :: Int -> String
207+showNodeId' _ = ""
208+
172209#endif
173210
174211#ifdef DEBUG_NODEIDS
@@ -178,14 +215,22 @@ nextNodeIdRef = unsafePerformIO $ newIORef 1
178215
179216newNodeId :: IO Int
180217newNodeId = atomicModifyIORef' nextNodeIdRef $ \n -> (succ n, n)
181−
182−{-# NOINLINE unsafeNodeId #-}
183−unsafeNodeId :: a -> Int
184−unsafeNodeId a = unsafePerformIO $ do
185− touch a
186− newNodeId
187218#endif
188219
220+--------------------------------------------------------------------------------
221+-- EventSubscription
222+--------------------------------------------------------------------------------
223+
224+--NB: Once you subscribe to an Event, you must always hold on the the WHOLE EventSubscription you get back
225+-- If you do not retain the subscription, you may be prematurely unsubscribed from the parent event.
226+data EventSubscription x = EventSubscription
227+ { _eventSubscription_unsubscribe :: !(IO ())
228+ , _eventSubscription_subscribed :: {-# UNPACK #-} !(EventSubscribed x)
229+ }
230+
231+unsubscribe :: EventSubscription x -> IO ()
232+unsubscribe (EventSubscription u _) = u
233+
189234--------------------------------------------------------------------------------
190235-- Event
191236--------------------------------------------------------------------------------
@@ -201,84 +246,169 @@ subscribeAndRead = unEvent
201246"cacheEvent/pushCheap" forall f e. pushCheap f (cacheEvent e) = cacheEvent (pushCheap f e)
202247"hold/cacheEvent" forall f e. hold f (cacheEvent e) = hold f e
203248 #-}
204−{- RULES
205− "subscribeAndRead/cacheEvent" forall e. subscribeAndRead (cacheEvent e) = subscribeAndRead e
206− #-}
207249
208250-- | Construct an 'Event' equivalent to that constructed by 'push', but with no
209251-- caching; if the computation function is very cheap, this is (much) more
210252-- efficient than 'push'
211−{- INLINE [1] pushCheap #-}
212−{-# NOINLINE pushCheap #-}
253+{-# INLINE [1] pushCheap #-}
213254pushCheap :: HasSpiderTimeline x => (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
214−pushCheap f e = Event $ \sub -> do
215− (subscription, occ) <- subscribeAndRead e $ sub
255+pushCheap !f e = Event $ \sub -> do
256+ (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "push" $ sub
216257 { subscriberPropagate = \a -> do
217− mb <- runComputeM $ f a
258+ mb <- f a
218259 mapM_ (subscriberPropagate sub) mb
219260 }
220− occ' <- join <$> mapM (runComputeM . f) occ
261+ occ' <- join <$> mapM f occ
221262 return (subscription, occ')
222263
264+-- | A subscriber that never triggers other 'Event's
265+{-# INLINE terminalSubscriber #-}
266+terminalSubscriber :: (a -> EventM x ()) -> Subscriber x a
267+terminalSubscriber p = Subscriber
268+ { subscriberPropagate = p
269+ , subscriberInvalidateHeight = \_ -> return ()
270+ , subscriberRecalculateHeight = \_ -> return ()
271+ }
272+
273+-- | Subscribe to an Event only for the duration of one occurrence
274+{-# INLINE subscribeAndReadHead #-}
275+subscribeAndReadHead :: HasSpiderTimeline x => Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
276+subscribeAndReadHead e sub = do
277+ subscriptionRef <- liftIO $ newIORef $ error "subscribeAndReadHead: not initialized"
278+ (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "head" $ sub
279+ { subscriberPropagate = \a -> do
280+ liftIO $ unsubscribe =<< readIORef subscriptionRef
281+ subscriberPropagate sub a
282+ }
283+ liftIO $ case occ of
284+ Nothing -> writeIORef subscriptionRef $! subscription
285+ Just _ -> unsubscribe subscription
286+ return (subscription, occ)
287+
288+--TODO: Make this lazy in its input event
289+headE :: (MonadIO m, Defer (SomeMergeInit x) m, HasSpiderTimeline x) => Event x a -> m (Event x a)
290+headE originalE = do
291+ parent <- liftIO $ newIORef $ Just originalE
292+ defer $ SomeMergeInit $ do --TODO: Rename SomeMergeInit appropriately
293+ let clearParent = liftIO $ writeIORef parent Nothing
294+ (_, occ) <- subscribeAndReadHead originalE $ terminalSubscriber $ const clearParent
295+ when (isJust occ) clearParent
296+ return $ Event $ \sub ->
297+ liftIO (readIORef parent) >>= \case
298+ Nothing -> subscribeAndReadNever
299+ Just e -> subscribeAndReadHead e sub
300+
223301data CacheSubscribed x a
224− = CacheSubscribed { _cacheSubscribed_subscribers :: {-# UNPACK #-} !(WeakBag (Subscriber x a))
225− , _cacheSubscribed_weakSelf :: {-# UNPACK #-} !(IORef (Weak (CacheSubscribed x a)))
302+ = CacheSubscribed { _cacheSubscribed_subscribers :: {-# UNPACK #-} !(FastWeakBag (Subscriber x a))
226303 , _cacheSubscribed_parent :: {-# UNPACK #-} !(EventSubscription x)
227− , _cacheSubscribed_cached :: {-# UNPACK #-} !(IORef (Maybe (CacheSubscribed x a)))
228304 , _cacheSubscribed_occurrence :: {-# UNPACK #-} !(IORef (Maybe a))
305+#ifdef DEBUG_NODEIDS
306+ , _cacheSubscribed_nodeId :: {-# UNPACK #-} !Int
307+#endif
229308 }
230309
310+nowSpiderEventM :: (HasSpiderTimeline x) => EventM x (R.Event (SpiderTimeline x) ())
311+nowSpiderEventM =
312+ SpiderEvent <$> now
313+
314+now :: (MonadIO m, Defer (Some Clear) m, HasSpiderTimeline x
315+ ) => m (Event x ())
316+now = do
317+ nowOrNot <- liftIO $ newIORef $ Just ()
318+ scheduleClear nowOrNot
319+ return . Event $ \_ -> do
320+ occ <- liftIO . readIORef $ nowOrNot
321+ return ( EventSubscription (return ()) eventSubscribedNow
322+ , occ
323+ )
324+
231325-- | Construct an 'Event' whose value is guaranteed not to be recomputed
232326-- repeatedly
233327--
234328--TODO: Try a caching strategy where we subscribe directly to the parent when
235−--there's only one subscriber, and then build our own WeakBag only when a second
329+--there's only one subscriber, and then build our own FastWeakBag only when a second
236330--subscriber joins
237−{-# NOINLINE cacheEvent #-}
238−cacheEvent :: HasSpiderTimeline x => Event x a -> Event x a
239−cacheEvent e = Event $ \sub -> {-# SCC "cacheEvent" #-} do
240− let !mSubscribedRef = unsafeNewIORef e Nothing
241− mSubscribed <- liftIO $ readIORef mSubscribedRef
242− case mSubscribed of
243− Just subscribed -> liftIO $ do
244− ticket <- WeakBag.insert sub (_cacheSubscribed_subscribers subscribed) (_cacheSubscribed_weakSelf subscribed) cleanupCacheSubscribed
245− occ <- readIORef $ _cacheSubscribed_occurrence subscribed
246− let es = EventSubscribed
247− { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ _cacheSubscribed_parent subscribed
248− , eventSubscribedRetained = toAny subscribed
249− }
250− return (EventSubscription (WeakBag.remove ticket >> touch ticket) es, occ)
251− Nothing -> do
252− weakSelf <- liftIO $ newIORef $ error "cacheEvent: weakSelf not yet intialized"
253− (subscribers, ticket) <- liftIO $ WeakBag.singleton sub weakSelf cleanupCacheSubscribed
254− occRef <- liftIO $ newIORef undefined
255− (parentSub, occ) <- subscribeAndRead e $ Subscriber
256− { subscriberPropagate = \a -> do
257− liftIO $ writeIORef occRef $ Just a
258− scheduleClear occRef
259− propagate a subscribers
260− , subscriberInvalidateHeight = \old -> do
261− WeakBag.traverse subscribers $ invalidateSubscriberHeight old
262− , subscriberRecalculateHeight = \new -> do
263− WeakBag.traverse subscribers $ recalculateSubscriberHeight new
331+{-# NOINLINE [0] cacheEvent #-}
332+cacheEvent :: forall x a. HasSpiderTimeline x => Event x a -> Event x a
333+cacheEvent e =
334+#ifdef DEBUG_TRACE_EVENTS
335+ withStackOneLine $ \callSite -> Event $
336+#else
337+ Event $
338+#endif
339+ unsafePerformIO $ do
340+ mSubscribedRef :: IORef (FastWeak (CacheSubscribed x a))
341+ <- newIORef emptyFastWeak
342+ pure $ \sub -> {-# SCC "cacheEvent" #-} do
343+#ifdef DEBUG_TRACE_EVENTS
344+ unless (BS8.null callSite) $ liftIO $ BS8.hPutStrLn stderr callSite
345+#endif
346+ subscribedTicket <- liftIO (readIORef mSubscribedRef >>= getFastWeakTicket) >>= \case
347+ Just subscribedTicket -> return subscribedTicket
348+ Nothing -> do
349+#ifdef DEBUG_NODEIDS
350+ nodeId <- liftIO newNodeId
351+#endif
352+ subscribers <- liftIO FastWeakBag.empty
353+ occRef <- liftIO $ newIORef Nothing -- This should never be read prior to being set below
354+#ifdef DEBUG_NODEIDS
355+ (parentSub, occ) <- subscribeAndRead e $ debugSubscriber' ("cacheEvent" <> showNodeId' nodeId) $ Subscriber
356+#else
357+ (parentSub, occ) <- subscribeAndRead e $ Subscriber
358+#endif
359+ { subscriberPropagate = \a -> do
360+ liftIO $ writeIORef occRef (Just a)
361+ scheduleClear occRef
362+ propagateFast a subscribers
363+ , subscriberInvalidateHeight = FastWeakBag.traverse_ subscribers . invalidateSubscriberHeight
364+ , subscriberRecalculateHeight = FastWeakBag.traverse_ subscribers . recalculateSubscriberHeight
365+ }
366+ when (isJust occ) $ do
367+ liftIO $ writeIORef occRef occ -- Set the initial value of occRef; we don't need to do this if occ is Nothing
368+ scheduleClear occRef
369+ let !subscribed = CacheSubscribed
370+ { _cacheSubscribed_subscribers = subscribers
371+ , _cacheSubscribed_parent = parentSub
372+ , _cacheSubscribed_occurrence = occRef
373+#ifdef DEBUG_NODEIDS
374+ , _cacheSubscribed_nodeId = nodeId
375+#endif
376+ }
377+ subscribedTicket <- liftIO $ mkFastWeakTicket subscribed
378+ liftIO $ writeIORef mSubscribedRef =<< getFastWeakTicketWeak subscribedTicket
379+ return subscribedTicket
380+ liftIO $ cacheSubscription sub mSubscribedRef subscribedTicket
381+
382+cacheSubscription :: Subscriber x a -> IORef (FastWeak (CacheSubscribed x a))
383+ -> FastWeakTicket (CacheSubscribed x a) -> IO (EventSubscription x, Maybe a)
384+cacheSubscription sub mSubscribedRef subscribedTicket = do
385+ subscribed <- getFastWeakTicketValue subscribedTicket
386+ ticket <- FastWeakBag.insert sub $ _cacheSubscribed_subscribers subscribed
387+ occ <- readIORef $ _cacheSubscribed_occurrence subscribed
388+
389+ let parentSub = _cacheSubscribed_parent subscribed
390+ es = EventSubscription
391+ { _eventSubscription_unsubscribe = do
392+ FastWeakBag.remove ticket
393+
394+ isEmpty <- FastWeakBag.isEmpty $ _cacheSubscribed_subscribers subscribed
395+ when isEmpty $ do
396+ writeIORef mSubscribedRef emptyFastWeak
397+ unsubscribe parentSub
398+ touch ticket
399+ touch subscribedTicket
400+ , _eventSubscription_subscribed = EventSubscribed
401+ { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed parentSub
402+ , eventSubscribedRetained = toAny subscribedTicket
403+#ifdef DEBUG_CYCLES
404+ , eventSubscribedGetParents = return [_eventSubscription_subscribed parentSub]
405+ , eventSubscribedHasOwnHeightRef = False
406+ , eventSubscribedWhoCreated = whoCreatedIORef mSubscribedRef
407+#endif
408+ }
264409 }
265− liftIO $ writeIORef occRef occ
266− when (isJust occ) $ scheduleClear occRef
267− let !subscribed = CacheSubscribed
268− { _cacheSubscribed_subscribers = subscribers
269− , _cacheSubscribed_weakSelf = weakSelf
270− , _cacheSubscribed_parent = parentSub
271− , _cacheSubscribed_cached = mSubscribedRef
272− , _cacheSubscribed_occurrence = occRef
273− }
274− liftIO $ writeIORef mSubscribedRef $ Just subscribed
275− liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "PushSubscribed"
276− return (EventSubscription (WeakBag.remove ticket >> touch ticket) (EventSubscribed (eventSubscribedHeightRef $ _eventSubscription_subscribed parentSub) (toAny subscribed)), occ)
410+ return (es, occ)
277411
278−cleanupCacheSubscribed :: CacheSubscribed x a -> IO ()
279−cleanupCacheSubscribed self = do
280− unsubscribe $ _cacheSubscribed_parent self
281− writeIORef (_cacheSubscribed_cached self) Nothing
282412
283413subscribe :: Event x a -> Subscriber x a -> EventM x (EventSubscription x)
284414subscribe e s = fst <$> subscribeAndRead e s
@@ -290,13 +420,16 @@ wrap tag getSpecificSubscribed sub = do
290420 let es = tag subd
291421 return (EventSubscription (WeakBag.remove sln >> touch sln) es, occ)
292422
293−eventRoot :: GCompare k => k a -> Root x k -> Event x a
423+eventRoot :: (GCompare k, HasSpiderTimeline x) => k a -> Root x k -> Event x a
294424eventRoot !k !r = Event $ wrap eventSubscribedRoot $ liftIO . getRootSubscribed k r
295425
426+subscribeAndReadNever :: EventM x (EventSubscription x, Maybe a)
427+subscribeAndReadNever = return (EventSubscription (return ()) eventSubscribedNever, Nothing)
428+
296429eventNever :: Event x a
297−eventNever = Event $ \_ -> return (EventSubscription (return ()) eventSubscribedNever, Nothing)
430+eventNever = Event $ const subscribeAndReadNever
298431
299−eventFan :: (GCompare k, HasSpiderTimeline x) => k a -> Fan x k -> Event x a
432+eventFan :: (GCompare k, HasSpiderTimeline x) => k a -> Fan x k v -> Event x (v a)
300433eventFan !k !f = Event $ wrap eventSubscribedFan $ getFanSubscribed k f
301434
302435eventSwitch :: HasSpiderTimeline x => Switch x a -> Event x a
@@ -305,14 +438,14 @@ eventSwitch !s = Event $ wrap eventSubscribedSwitch $ getSwitchSubscribed s
305438eventCoincidence :: HasSpiderTimeline x => Coincidence x a -> Event x a
306439eventCoincidence !c = Event $ wrap eventSubscribedCoincidence $ getCoincidenceSubscribed c
307440
308−eventHold :: HasSpiderTimeline x => Hold x p -> Event x p
441+eventHold :: Hold x p -> Event x p
309442eventHold !h = Event $ subscribeHoldEvent h
310443
311444eventDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> Event x p
312445eventDyn !j = Event $ \sub -> getDynHold j >>= \h -> subscribeHoldEvent h sub
313446
314447{-# INLINE subscribeCoincidenceInner #-}
315−subscribeCoincidenceInner :: CanSubscribe x m => Event x a -> Height -> CoincidenceSubscribed x a -> m (Maybe a, Height, EventSubscribed x)
448+subscribeCoincidenceInner :: HasSpiderTimeline x => Event x a -> Height -> CoincidenceSubscribed x a -> EventM x (Maybe a, Height, EventSubscribed x)
316449subscribeCoincidenceInner inner outerHeight subscribedUnsafe = do
317450 subInner <- liftIO $ newSubscriberCoincidenceInner subscribedUnsafe
318451 (subscription@(EventSubscription _ innerSubd), innerOcc) <- subscribeAndRead inner subInner
@@ -331,16 +464,6 @@ data Subscriber x a = Subscriber
331464 , subscriberRecalculateHeight :: !(Height -> IO ())
332465 }
333466
334−--TODO: Move this comment to WeakBag
335−-- These function are constructor functions that are marked NOINLINE so they are
336−-- opaque to GHC. If we do not do this, then GHC will sometimes fuse the constructor away
337−-- so any weak references that are attached to the constructors will have their
338−-- finalizer run. Using the opaque constructor, does not see the
339−-- constructor application, so it behaves like an IORef and cannot be fused away.
340−--
341−-- The result is also evaluated to WHNF, since forcing a thunk invalidates
342−-- the weak pointer to it in some cases.
343−
344467newSubscriberHold :: (HasSpiderTimeline x, Patch p) => Hold x p -> IO (Subscriber x p)
345468newSubscriberHold h = return $ Subscriber
346469 { subscriberPropagate = {-# SCC "traverseHold" #-} propagateSubscriberHold h
@@ -348,85 +471,68 @@ newSubscriberHold h = return $ Subscriber
348471 , subscriberRecalculateHeight = \_ -> return ()
349472 }
350473
351−newSubscriberFan :: forall x k. (HasSpiderTimeline x, GCompare k) => FanSubscribed x k -> IO (Subscriber x (DMap k Identity))
352−newSubscriberFan subscribed = return $ Subscriber
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
353476 { subscriberPropagate = \a -> {-# SCC "traverseFan" #-} do
354477 subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
355− tracePropagate (Proxy :: Proxy x) $ "SubscriberFan" <> showNodeId subscribed <> ": " ++ show (DMap.size subs) ++ " keys subscribed, " ++ show (DMap.size a) ++ " keys firing"
478+ tracePropagate (Proxy :: Proxy x) $ show (DMap.size subs) <> " keys subscribed, " <> show (DMap.size a) <> " keys firing"
356479 liftIO $ writeIORef (fanSubscribedOccurrence subscribed) $ Just a
357480 scheduleClear $ fanSubscribedOccurrence subscribed
358− let f _ (Pair (Identity v) subsubs) = do
481+ let f _ (Pair v subsubs) = do
359482 propagate v $ _fanSubscribedChildren_list subsubs
360483 return $ Constant ()
361484 _ <- DMap.traverseWithKey f $ DMap.intersectionWithKey (\_ -> Pair) a subs --TODO: Would be nice to have DMap.traverse_
362485 return ()
363486 , subscriberInvalidateHeight = \old -> do
364− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
365487 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
366− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
367− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
488+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
368489 , subscriberRecalculateHeight = \new -> do
369− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
370490 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
371− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
372− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
491+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
373492 }
374493
375494newSubscriberSwitch :: forall x a. HasSpiderTimeline x => SwitchSubscribed x a -> IO (Subscriber x a)
376−newSubscriberSwitch subscribed = return $ Subscriber
495+newSubscriberSwitch subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
377496 { subscriberPropagate = \a -> {-# SCC "traverseSwitch" #-} do
378− tracePropagate (Proxy :: Proxy x) $ "SubscriberSwitch" <> showNodeId subscribed
379497 liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
380498 scheduleClear $ switchSubscribedOccurrence subscribed
381499 propagate a $ switchSubscribedSubscribers subscribed
382500 , subscriberInvalidateHeight = \_ -> do
383− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
384501 oldHeight <- readIORef $ switchSubscribedHeight subscribed
385502 when (oldHeight /= invalidHeight) $ do
386503 writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
387− WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
388− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
389− , subscriberRecalculateHeight = \new -> do
390− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
391− updateSwitchHeight new subscribed
392− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
393− }
504+ WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
505+ , subscriberRecalculateHeight = (`updateSwitchHeight` subscribed)
506+ }
394507
395508newSubscriberCoincidenceOuter :: forall x b. HasSpiderTimeline x => CoincidenceSubscribed x b -> IO (Subscriber x (Event x b))
396−newSubscriberCoincidenceOuter subscribed = return $ Subscriber
509+newSubscriberCoincidenceOuter subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
397510 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceOuter" #-} do
398− tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
399511 outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
400512 tracePropagate (Proxy :: Proxy x) $ " outerHeight = " <> show outerHeight
401513 (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
402514 tracePropagate (Proxy :: Proxy x) $ " isJust occ = " <> show (isJust occ)
403515 tracePropagate (Proxy :: Proxy x) $ " innerHeight = " <> show innerHeight
516+
404517 liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
405518 scheduleClear $ coincidenceSubscribedInnerParent subscribed
406519 case occ of
407− Nothing -> do
520+ Nothing ->
408521 when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
409522 writeIORef (coincidenceSubscribedHeight subscribed) $! innerHeight
410− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
411− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
523+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
524+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
412525 Just o -> do -- Since it's already firing, no need to adjust height
413526 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
414527 scheduleClear $ coincidenceSubscribedOccurrence subscribed
415528 propagate o $ coincidenceSubscribedSubscribers subscribed
416− , subscriberInvalidateHeight = \_ -> do
417− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
418− invalidateCoincidenceHeight subscribed
419− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
420− , subscriberRecalculateHeight = \_ -> do
421− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
422− recalculateCoincidenceHeight subscribed
423− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
529+ , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
530+ , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
424531 }
425532
426533newSubscriberCoincidenceInner :: forall x a. HasSpiderTimeline x => CoincidenceSubscribed x a -> IO (Subscriber x a)
427−newSubscriberCoincidenceInner subscribed = return $ Subscriber
534+newSubscriberCoincidenceInner subscribed = debugSubscriber ("SubscriberCoincidenceInner" <> showNodeId subscribed) $ Subscriber
428535 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceInner" #-} do
429− tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceInner" <> showNodeId subscribed
430536 occ <- liftIO $ readIORef $ coincidenceSubscribedOccurrence subscribed
431537 case occ of
432538 Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
@@ -434,14 +540,8 @@ newSubscriberCoincidenceInner subscribed = return $ Subscriber
434540 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
435541 scheduleClear $ coincidenceSubscribedOccurrence subscribed
436542 propagate a $ coincidenceSubscribedSubscribers subscribed
437− , subscriberInvalidateHeight = \_ -> do
438− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
439− invalidateCoincidenceHeight subscribed
440− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
441− , subscriberRecalculateHeight = \_ -> do
442− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
443− recalculateCoincidenceHeight subscribed
444− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
543+ , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
544+ , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
445545 }
446546
447547invalidateSubscriberHeight :: Height -> Subscriber x a -> IO ()
@@ -451,11 +551,18 @@ recalculateSubscriberHeight :: Height -> Subscriber x a -> IO ()
451551recalculateSubscriberHeight = flip subscriberRecalculateHeight
452552
453553-- | Propagate everything at the current height
454−propagate :: a -> WeakBag (Subscriber x a) -> EventM x ()
455−propagate a subscribers = withIncreasedDepth $ do
554+propagate :: forall x a. HasSpiderTimeline x => a -> WeakBag (Subscriber x a) -> EventM x ()
555+propagate a subscribers = withIncreasedDepth (Proxy::Proxy x) $
456556 -- 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
457557 --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
458− WeakBag.traverse subscribers $ \s -> subscriberPropagate s a
558+ WeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
559+
560+-- | Propagate everything at the current height
561+propagateFast :: forall x a. HasSpiderTimeline x => a -> FastWeakBag (Subscriber x a) -> EventM x ()
562+propagateFast a subscribers = withIncreasedDepth (Proxy::Proxy x) $
563+ -- Note: in the following traversal, we do not visit nodes that are added to the list during our traversal; they are new events, which will necessarily have full information already, so there is no need to traverse them
564+ --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
565+ FastWeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
459566
460567--------------------------------------------------------------------------------
461568-- EventSubscribed
@@ -464,11 +571,16 @@ propagate a subscribers = withIncreasedDepth $ do
464571toAny :: a -> Any
465572toAny = unsafeCoerce
466573
574+-- Why do we use Any here, instead of just giving eventSubscribedRetained an
575+-- existential type? Sadly, GHC does not currently know how to unbox types
576+-- with existentially quantified fields. So instead we just coerce values
577+-- to type Any on the way in. Since we never coerce them back, this is
578+-- perfectly safe.
467579data EventSubscribed x = EventSubscribed
468580 { eventSubscribedHeightRef :: {-# UNPACK #-} !(IORef Height)
469581 , eventSubscribedRetained :: {-# NOUNPACK #-} !Any
470582#ifdef DEBUG_CYCLES
471− , eventSubscribedGetParents :: !(IO [Some (EventSubscribed x)]) -- For debugging loops
583+ , eventSubscribedGetParents :: !(IO [EventSubscribed x]) -- For debugging loops
472584 , eventSubscribedHasOwnHeightRef :: !Bool
473585 , eventSubscribedWhoCreated :: !(IO [String])
474586#endif
@@ -495,13 +607,23 @@ eventSubscribedNever = EventSubscribed
495607 , eventSubscribedWhoCreated = return ["never"]
496608#endif
497609 }
610+eventSubscribedNow :: EventSubscribed x
611+eventSubscribedNow = EventSubscribed
612+ { eventSubscribedHeightRef = zeroRef
613+ , eventSubscribedRetained = toAny ()
614+#ifdef DEBUG_CYCLES
615+ , eventSubscribedGetParents = return []
616+ , eventSubscribedHasOwnHeightRef = False
617+ , eventSubscribedWhoCreated = return ["now"]
618+#endif
619+ }
498620
499−eventSubscribedFan :: FanSubscribed x k -> EventSubscribed x
621+eventSubscribedFan :: FanSubscribed x k v -> EventSubscribed x
500622eventSubscribedFan !subscribed = EventSubscribed
501623 { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
502624 , eventSubscribedRetained = toAny subscribed
503625#ifdef DEBUG_CYCLES
504− , eventSubscribedGetParents = return [Some.This $ _eventSubscription_subscribed $ fanSubscribedParent subscribed]
626+ , eventSubscribedGetParents = return [_eventSubscription_subscribed $ fanSubscribedParent subscribed]
505627 , eventSubscribedHasOwnHeightRef = False
506628 , eventSubscribedWhoCreated = whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
507629#endif
@@ -514,7 +636,7 @@ eventSubscribedSwitch !subscribed = EventSubscribed
514636#ifdef DEBUG_CYCLES
515637 , eventSubscribedGetParents = do
516638 s <- readIORef $ switchSubscribedCurrentParent subscribed
517− return [Some.This $ _eventSubscription_subscribed s]
639+ return [_eventSubscription_subscribed s]
518640 , eventSubscribedHasOwnHeightRef = True
519641 , eventSubscribedWhoCreated = whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
520642#endif
@@ -527,8 +649,8 @@ eventSubscribedCoincidence !subscribed = EventSubscribed
527649#ifdef DEBUG_CYCLES
528650 , eventSubscribedGetParents = do
529651 innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
530− let outerParent = Some.This $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
531− innerParents = maybeToList $ fmap Some.This innerSubscription
652+ let outerParent = _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
653+ innerParents = maybeToList $ innerSubscription
532654 return $ outerParent : innerParents
533655 , eventSubscribedHasOwnHeightRef = True
534656 , eventSubscribedWhoCreated = whoCreatedIORef $ coincidenceSubscribedCachedSubscribed subscribed
@@ -542,34 +664,22 @@ getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
542664whoCreatedEventSubscribed :: EventSubscribed x -> IO [String]
543665whoCreatedEventSubscribed = eventSubscribedWhoCreated
544666
545−walkInvalidHeightParents :: EventSubscribed x -> IO [Some (EventSubscribed x)]
667+walkInvalidHeightParents :: EventSubscribed x -> IO [EventSubscribed x]
546668walkInvalidHeightParents s0 = do
547− subscribers <- flip execStateT mempty $ ($ Some.This s0) $ fix $ \loop (Some.This s) -> do
669+ subscribers <- flip execStateT mempty $ ($ s0) $ fix $ \loop s -> do
548670 h <- liftIO $ readIORef $ eventSubscribedHeightRef s
549671 when (h == invalidHeight) $ do
550672 when (eventSubscribedHasOwnHeightRef s) $ liftIO $ writeIORef (eventSubscribedHeightRef s) $! invalidHeightBeingTraversed
551− modify (Some.This s :)
673+ modify (s :)
552674 mapM_ loop =<< liftIO (eventSubscribedGetParents s)
553− forM_ subscribers $ \(Some.This s) -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
675+ forM_ subscribers $ \s -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
554676 return subscribers
555677#endif
556678
557679{-# INLINE subscribeHoldEvent #-}
558−subscribeHoldEvent :: CanSubscribe x m => Hold x p -> Subscriber x p -> m (EventSubscription x, Maybe p)
680+subscribeHoldEvent :: Hold x p -> Subscriber x p -> EventM x (EventSubscription x, Maybe p)
559681subscribeHoldEvent = subscribeAndRead . holdEvent
560682
561−--------------------------------------------------------------------------------
562−-- EventSubscription
563−--------------------------------------------------------------------------------
564−
565−data EventSubscription x = EventSubscription
566− { _eventSubscription_unsubscribe :: !(IO ())
567− , _eventSubscription_subscribed :: {-# UNPACK #-} !(EventSubscribed x)
568− }
569−
570−unsubscribe :: EventSubscription x -> IO ()
571−unsubscribe (EventSubscription u _) = u
572−
573683--------------------------------------------------------------------------------
574684-- Behavior
575685--------------------------------------------------------------------------------
@@ -590,7 +700,7 @@ behaviorPull !p = Behavior $ do
590700 val <- liftIO $ readIORef $ pullValue p
591701 case val of
592702 Just subscribed -> do
593− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
703+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedPull subscribed)) :))
594704 askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (pullSubscribedInvalidators subscribed) (wi:))
595705 liftIO $ touch $ pullSubscribedOwnInvalidator subscribed
596706 return $ pullSubscribedValue subscribed
@@ -599,7 +709,7 @@ behaviorPull !p = Behavior $ do
599709 wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorPull"
600710 parentsRef <- liftIO $ newIORef []
601711 holdInits <- askBehaviorHoldInits
602− a <- liftIO $ runReaderT (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
712+ a <- liftIO $ runReaderIO (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
603713 invsRef <- liftIO . newIORef . maybeToList =<< askInvalidator
604714 parents <- liftIO $ readIORef parentsRef
605715 let subscribed = PullSubscribed
@@ -609,7 +719,7 @@ behaviorPull !p = Behavior $ do
609719 , pullSubscribedParents = parents
610720 }
611721 liftIO $ writeIORef (pullValue p) $ Just subscribed
612− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
722+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedPull subscribed)) :))
613723 return a
614724
615725behaviorDyn :: Patch p => Dyn x p -> Behavior x (PatchTarget p)
@@ -620,7 +730,8 @@ readHoldTracked :: Hold x p -> BehaviorM x (PatchTarget p)
620730readHoldTracked h = do
621731 result <- liftIO $ readIORef $ holdValue h
622732 askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (holdInvalidators h) (wi:))
623− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedHold h) :))
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
624735 return result
625736
626737{-# INLINABLE readBehaviorUntracked #-}
@@ -633,42 +744,46 @@ readBehaviorUntracked b = do
633744-- Dynamic
634745--------------------------------------------------------------------------------
635746
636−data Dynamic x p = Dynamic
637− { dynamicCurrent :: !(Behavior x (PatchTarget p))
638− , dynamicUpdated :: !(Event x p)
747+type DynamicS x p = Dynamic x (PatchTarget p) p
748+
749+data Dynamic x target p = Dynamic
750+ { dynamicCurrent :: !(Behavior x target)
751+ , dynamicUpdated :: Event x p -- This must be lazy; see the comment on holdEvent --TODO: Would this let us eliminate `Dyn`?
639752 }
640753
641−dynamicHold :: HasSpiderTimeline x => Hold x p -> Dynamic x p
754+deriving instance (HasSpiderTimeline x) => Functor (Dynamic x target)
755+
756+
757+
758+
759+dynamicHold :: Hold x p -> DynamicS x p
642760dynamicHold !h = Dynamic
643761 { dynamicCurrent = behaviorHold h
644762 , dynamicUpdated = eventHold h
645763 }
646764
647−dynamicHoldIdentity :: HasSpiderTimeline x => Hold x (Identity a) -> Dynamic x (Identity a)
765+dynamicHoldIdentity :: Hold x (Identity a) -> DynamicS x (Identity a)
648766dynamicHoldIdentity = dynamicHold
649767
650−dynamicConst :: PatchTarget p -> Dynamic x p
768+dynamicConst :: PatchTarget p -> DynamicS x p
651769dynamicConst !a = Dynamic
652770 { dynamicCurrent = behaviorConst a
653771 , dynamicUpdated = eventNever
654772 }
655773
656−dynamicDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> Dynamic x p
774+dynamicDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> DynamicS x p
657775dynamicDyn !d = Dynamic
658776 { dynamicCurrent = behaviorDyn d
659777 , dynamicUpdated = eventDyn d
660778 }
661779
662−dynamicDynIdentity :: HasSpiderTimeline x => Dyn x (Identity a) -> Dynamic x (Identity a)
780+dynamicDynIdentity :: HasSpiderTimeline x => Dyn x (Identity a) -> DynamicS x (Identity a)
663781dynamicDynIdentity = dynamicDyn
664782
665783--------------------------------------------------------------------------------
666784-- Combinators
667785--------------------------------------------------------------------------------
668786
669−--TODO: Figure out why certain things are not 'representational', then make them
670−--representational so we can use coerce
671−
672787--type role Hold representational
673788data Hold x p
674789 = Hold { holdValue :: !(IORef (PatchTarget p))
@@ -680,35 +795,46 @@ data Hold x p
680795#endif
681796 }
682797
798+-- | A statically allocated 'SpiderTimeline'
683799data Global
684800
685801{-# NOINLINE globalSpiderTimelineEnv #-}
686802globalSpiderTimelineEnv :: SpiderTimelineEnv Global
687−!globalSpiderTimelineEnv = unsafePerformIO unsafeNewSpiderTimelineEnv
803+globalSpiderTimelineEnv = unsafePerformIO unsafeNewSpiderTimelineEnv
688804
689805-- | Stores all global data relevant to a particular Spider timeline; only one
690806-- value should exist for each type @x@
691−data SpiderTimelineEnv x = SpiderTimelineEnv
807+newtype SpiderTimelineEnv x = STE {unSTE :: SpiderTimelineEnv' x}
808+-- We implement SpiderTimelineEnv with a newtype wrapper so
809+-- we can get the coercions we want safely.
810+type role SpiderTimelineEnv nominal
811+
812+data SpiderTimelineEnv' x = SpiderTimelineEnv
692813 { _spiderTimeline_lock :: {-# UNPACK #-} !(MVar ())
693814 , _spiderTimeline_eventEnv :: {-# UNPACK #-} !(EventEnv x)
694815#ifdef DEBUG
695816 , _spiderTimeline_depth :: {-# UNPACK #-} !(IORef Int)
696817#endif
697818 }
698−type role SpiderTimelineEnv nominal
819+type role SpiderTimelineEnv' phantom
820+
821+instance Eq (SpiderTimelineEnv x) where
822+ _ == _ = True -- Since only one exists of each type
699823
700824instance GEq SpiderTimelineEnv where
701− a `geq` b = if _spiderTimeline_lock a == _spiderTimeline_lock b
825+ a `geq` b = if _spiderTimeline_lock (unSTE a) == _spiderTimeline_lock (unSTE b)
702826 then Just $ unsafeCoerce Refl -- This unsafeCoerce is safe because the same SpiderTimelineEnv can't have two different 'x' arguments
703827 else Nothing
704828
705829data EventEnv x
706830 = EventEnv { eventEnvAssignments :: !(IORef [SomeAssignment x]) -- Needed for Subscribe
707831 , eventEnvHoldInits :: !(IORef [SomeHoldInit x]) -- Needed for Subscribe
832+ , eventEnvDynInits :: !(IORef [SomeDynInit x])
708833 , eventEnvMergeUpdates :: !(IORef [SomeMergeUpdate x])
709834 , eventEnvMergeInits :: !(IORef [SomeMergeInit x]) -- Needed for Subscribe
710− , eventEnvClears :: !(IORef [SomeClear]) -- Needed for Subscribe
711− , eventEnvRootClears :: !(IORef [SomeRootClear])
835+ , eventEnvClears :: !(IORef [Some Clear]) -- Needed for Subscribe
836+ , eventEnvIntClears :: !(IORef [Some IntClear])
837+ , eventEnvRootClears :: !(IORef [Some RootClear])
712838 , eventEnvCurrentHeight :: !(IORef Height) -- Needed for Subscribe
713839 , eventEnvResetCoincidences :: !(IORef [SomeResetCoincidence x]) -- Needed for Subscribe
714840 , eventEnvDelayedMerges :: !(IORef (IntMap [EventM x ()]))
@@ -719,7 +845,7 @@ runEventM :: EventM x a -> IO a
719845runEventM = unEventM
720846
721847asksEventEnv :: forall x a. HasSpiderTimeline x => (EventEnv x -> a) -> EventM x a
722−asksEventEnv f = return $ f $ _spiderTimeline_eventEnv (spiderTimeline :: SpiderTimelineEnv x)
848+asksEventEnv f = return $ f $ _spiderTimeline_eventEnv (unSTE (spiderTimeline :: SpiderTimelineEnv x))
723849
724850class MonadIO m => Defer a m where
725851 getDeferralQueue :: m (IORef [a])
@@ -738,6 +864,10 @@ instance HasSpiderTimeline x => Defer (SomeHoldInit x) (EventM x) where
738864 {-# INLINE getDeferralQueue #-}
739865 getDeferralQueue = asksEventEnv eventEnvHoldInits
740866
867+instance HasSpiderTimeline x => Defer (SomeDynInit x) (EventM x) where
868+ {-# INLINE getDeferralQueue #-}
869+ getDeferralQueue = asksEventEnv eventEnvDynInits
870+
741871instance Defer (SomeHoldInit x) (BehaviorM x) where
742872 {-# INLINE getDeferralQueue #-}
743873 getDeferralQueue = BehaviorM $ asks snd
@@ -764,11 +894,7 @@ instance HasSpiderTimeline x => HasCurrentHeight x (EventM x) where
764894 delayedRef <- asksEventEnv eventEnvDelayedMerges
765895 liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) (unHeight height) [subscribed]
766896
767−#ifdef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
768−class x ~ Global => HasSpiderTimeline x where
769−#else
770897class HasSpiderTimeline x where
771−#endif
772898 -- | Retrieve the current SpiderTimelineEnv
773899 spiderTimeline :: SpiderTimelineEnv x
774900
@@ -780,28 +906,35 @@ putCurrentHeight h = do
780906 heightRef <- asksEventEnv eventEnvCurrentHeight
781907 liftIO $ writeIORef heightRef $! h
782908
783−instance HasSpiderTimeline x => Defer SomeClear (EventM x) where
909+instance HasSpiderTimeline x => Defer (Some Clear) (EventM x) where
784910 {-# INLINE getDeferralQueue #-}
785911 getDeferralQueue = asksEventEnv eventEnvClears
786912
787913{-# INLINE scheduleClear #-}
788−scheduleClear :: Defer SomeClear m => IORef (Maybe a) -> m ()
789−scheduleClear r = defer $ SomeClear r
914+scheduleClear :: Defer (Some Clear) m => IORef (Maybe a) -> m ()
915+scheduleClear r = defer $ Some $ Clear r
790916
791−instance HasSpiderTimeline x => Defer SomeRootClear (EventM x) where
917+instance HasSpiderTimeline x => Defer (Some IntClear) (EventM x) where
918+ {-# INLINE getDeferralQueue #-}
919+ getDeferralQueue = asksEventEnv eventEnvIntClears
920+
921+{-# INLINE scheduleIntClear #-}
922+scheduleIntClear :: Defer (Some IntClear) m => IORef (IntMap a) -> m ()
923+scheduleIntClear r = defer $ Some $ IntClear r
924+
925+instance HasSpiderTimeline x => Defer (Some RootClear) (EventM x) where
792926 {-# INLINE getDeferralQueue #-}
793927 getDeferralQueue = asksEventEnv eventEnvRootClears
794928
795929{-# INLINE scheduleRootClear #-}
796−scheduleRootClear :: Defer SomeRootClear m => IORef (DMap k Identity) -> m ()
797−scheduleRootClear r = defer $ SomeRootClear r
930+scheduleRootClear :: Defer (Some RootClear) m => IORef (DMap k Identity) -> m ()
931+scheduleRootClear r = defer $ Some $ RootClear r
798932
799933instance HasSpiderTimeline x => Defer (SomeResetCoincidence x) (EventM x) where
800934 {-# INLINE getDeferralQueue #-}
801935 getDeferralQueue = asksEventEnv eventEnvResetCoincidences
802936
803937-- Note: hold cannot examine its event until after the phase is over
804−{- SPECIALIZE hold :: (HasSpiderTimeline x, Patch p) => PatchTarget p -> Event x p -> EventM x (Hold x p) #-}
805938{-# INLINE [1] hold #-}
806939hold :: (Patch p, Defer (SomeHoldInit x) m) => PatchTarget p -> Event x p -> m (Hold x p)
807940hold v0 e = do
@@ -824,7 +957,7 @@ hold v0 e = do
824957 return h
825958
826959{-# INLINE getHoldEventSubscription #-}
827−getHoldEventSubscription :: forall m p x. (Defer (SomeAssignment x) m, Defer (SomeHoldInit x) m, Defer SomeClear m, Patch p, HasCurrentHeight x m, Defer (SomeMergeInit x) m, Defer (SomeResetCoincidence x) m, HasSpiderTimeline x, m ~ EventM x) => Hold x p -> m (EventSubscription x)
960+getHoldEventSubscription :: forall p x. (HasSpiderTimeline x, Patch p) => Hold x p -> EventM x (EventSubscription x)
828961getHoldEventSubscription h = do
829962 ep <- liftIO $ readIORef $ holdParent h
830963 case ep of
@@ -850,9 +983,9 @@ getHoldEventSubscription h = do
850983
851984type BehaviorEnv x = (Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]), IORef [SomeHoldInit x])
852985
853−--type role BehaviorM representational
854986-- BehaviorM can sample behaviors
855−newtype BehaviorM x a = BehaviorM { unBehaviorM :: ReaderT (BehaviorEnv x) IO a } deriving (Functor, Applicative, MonadIO, MonadFix)
987+newtype BehaviorM x a = BehaviorM { unBehaviorM :: ReaderIO (BehaviorEnv x) a }
988+ deriving (Functor, Applicative, MonadIO, MonadFix, MonadReader (BehaviorEnv x))
856989
857990instance Monad (BehaviorM x) where
858991 {-# INLINE (>>=) #-}
@@ -861,14 +994,16 @@ instance Monad (BehaviorM x) where
861994 BehaviorM x >> BehaviorM y = BehaviorM $ x >> y
862995 {-# INLINE return #-}
863996 return x = BehaviorM $ return x
997+#if !MIN_VERSION_base(4,13,0)
864998 {-# INLINE fail #-}
865999 fail s = BehaviorM $ fail s
1000+#endif
8661001
8671002data BehaviorSubscribed x a
8681003 = forall p. BehaviorSubscribedHold (Hold x p)
8691004 | BehaviorSubscribedPull (PullSubscribed x a)
8701005
871−data SomeBehaviorSubscribed x = forall a. SomeBehaviorSubscribed (BehaviorSubscribed x a)
1006+newtype SomeBehaviorSubscribed x = SomeBehaviorSubscribed (Some (BehaviorSubscribed x))
8721007
8731008--type role PullSubscribed representational
8741009data PullSubscribed x a
@@ -903,7 +1038,7 @@ data RootSubscribed x a = forall k. GCompare k => RootSubscribed
9031038#endif
9041039 }
9051040
906−data Root x (k :: * -> *)
1041+data Root x k
9071042 = Root { rootOccurrence :: !(IORef (DMap k Identity)) -- The currently-firing occurrence of this event
9081043 , rootSubscribed :: !(IORef (DMap k (RootSubscribed x)))
9091044 , rootInit :: !(forall a. k a -> RootTrigger x a -> IO (IO ()))
@@ -911,6 +1046,8 @@ data Root x (k :: * -> *)
9111046
9121047data SomeHoldInit x = forall p. Patch p => SomeHoldInit !(Hold x p)
9131048
1049+data SomeDynInit x = forall p. Patch p => SomeDynInit !(Dyn x p)
1050+
9141051data SomeMergeUpdate x = SomeMergeUpdate
9151052 { _someMergeUpdate_update :: !(EventM x [EventSubscription x])
9161053 , _someMergeUpdate_invalidateHeight :: !(IO ())
@@ -920,19 +1057,15 @@ data SomeMergeUpdate x = SomeMergeUpdate
9201057newtype SomeMergeInit x = SomeMergeInit { unSomeMergeInit :: EventM x () }
9211058
9221059-- EventM can do everything BehaviorM can, plus create holds
923−newtype EventM x a = EventM { unEventM :: IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException) -- The environment should be Nothing if we are not in a frame, and Just if we are - in which case it is a list of assignments to be done after the frame is over
924−
925−newtype ComputeM x a = ComputeM (ReaderT (IORef [SomeHoldInit x]) IO a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
926−
927−instance Defer (SomeHoldInit x) (ComputeM x) where
928− getDeferralQueue = ComputeM ask
929−
930−{-# INLINABLE runComputeM #-}
931−runComputeM :: Defer (SomeHoldInit x) m => ComputeM x a -> m a
932−runComputeM (ComputeM a) = liftIO . runReaderT a =<< getDeferralQueue
1060+newtype EventM x a = EventM { unEventM :: IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException)
9331061
9341062newtype MergeSubscribedParent x a = MergeSubscribedParent { unMergeSubscribedParent :: EventSubscription x }
9351063
1064+data MergeSubscribedParentWithMove x k a = MergeSubscribedParentWithMove
1065+ { _mergeSubscribedParentWithMove_subscription :: !(EventSubscription x)
1066+ , _mergeSubscribedParentWithMove_key :: !(IORef (k a))
1067+ }
1068+
9361069data HeightBag = HeightBag
9371070 { _heightBag_size :: {-# UNPACK #-} !Int
9381071 , _heightBag_contents :: !(IntMap Word) -- Number of excess in each bucket
@@ -949,7 +1082,8 @@ heightBagFromList :: [Height] -> HeightBag
9491082heightBagFromList heights = heightBagVerify $ foldl' (flip heightBagAdd) heightBagEmpty heights
9501083
9511084heightBagAdd :: Height -> HeightBag -> HeightBag
952−heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
1085+heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $
1086+ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
9531087
9541088heightBagRemove :: Height -> HeightBag -> HeightBag
9551089heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.lookup h c of
@@ -958,6 +1092,13 @@ heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.loo
9581092 0 -> IntMap.delete h c
9591093 _ -> IntMap.insert h (pred old) c
9601094
1095+heightBagRemoveMaybe :: Height -> HeightBag -> Maybe HeightBag
1096+heightBagRemoveMaybe (Height h) b@(HeightBag s c) = heightBagVerify . removed <$> IntMap.lookup h c where
1097+ removed old = HeightBag (pred s) $ case old of
1098+ 0 -> IntMap.delete h c
1099+ _ -> IntMap.insert h (pred old) c
1100+
1101+
9611102heightBagMax :: HeightBag -> Height
9621103heightBagMax (HeightBag _ c) = case IntMap.maxViewWithKey c of
9631104 Just ((h, _), _) -> Height h
@@ -975,25 +1116,25 @@ heightBagVerify b@(HeightBag s c) = if
9751116heightBagVerify = id
9761117#endif
9771118
978−data FanSubscribedChildren (x :: *) k a = FanSubscribedChildren
979− { _fanSubscribedChildren_list :: !(WeakBag (Subscriber x a))
980− , _fanSubscribedChildren_self :: {-# NOUNPACK #-} !(k a, FanSubscribed x k)
981− , _fanSubscribedChildren_weakSelf :: !(IORef (Weak (k a, FanSubscribed x k)))
1119+data FanSubscribedChildren x k v a = FanSubscribedChildren
1120+ { _fanSubscribedChildren_list :: !(WeakBag (Subscriber x (v a)))
1121+ , _fanSubscribedChildren_self :: {-# NOUNPACK #-} !(k a, FanSubscribed x k v)
1122+ , _fanSubscribedChildren_weakSelf :: !(IORef (Weak (k a, FanSubscribed x k v)))
9821123 }
9831124
984−data FanSubscribed (x :: *) k
985− = FanSubscribed { fanSubscribedCachedSubscribed :: !(IORef (Maybe (FanSubscribed x k)))
986− , fanSubscribedOccurrence :: !(IORef (Maybe (DMap k Identity)))
987− , fanSubscribedSubscribers :: !(IORef (DMap k (FanSubscribedChildren x k))) -- This DMap should never be empty
1125+data FanSubscribed x k v
1126+ = FanSubscribed { fanSubscribedCachedSubscribed :: !(IORef (Maybe (FanSubscribed x k v)))
1127+ , fanSubscribedOccurrence :: !(IORef (Maybe (DMap k v)))
1128+ , fanSubscribedSubscribers :: !(IORef (DMap k (FanSubscribedChildren x k v))) -- This DMap should never be empty
9881129 , fanSubscribedParent :: !(EventSubscription x)
9891130#ifdef DEBUG_NODEIDS
9901131 , fanSubscribedNodeId :: Int
9911132#endif
9921133 }
9931134
994−data Fan x k
995− = Fan { fanParent :: !(Event x (DMap k Identity))
996− , fanSubscribed :: !(IORef (Maybe (FanSubscribed x k)))
1135+data Fan x k v
1136+ = Fan { fanParent :: !(Event x (DMap k v))
1137+ , fanSubscribed :: !(IORef (Maybe (FanSubscribed x k v)))
9971138 }
9981139
9991140data SwitchSubscribed x a
@@ -1017,7 +1158,9 @@ data Switch x a
10171158 , switchSubscribed :: !(IORef (Maybe (SwitchSubscribed x a)))
10181159 }
10191160
1161+#ifdef USE_TEMPLATE_HASKELL
10201162{-# ANN CoincidenceSubscribed "HLint: ignore Redundant bracket" #-}
1163+#endif
10211164data CoincidenceSubscribed x a
10221165 = CoincidenceSubscribed { coincidenceSubscribedCachedSubscribed :: !(IORef (Maybe (CoincidenceSubscribed x a)))
10231166 , coincidenceSubscribedOccurrence :: !(IORef (Maybe a))
@@ -1045,20 +1188,35 @@ newInvalidatorSwitch subd = return $! InvalidatorSwitch subd
10451188newInvalidatorPull :: Pull x a -> IO (Invalidator x)
10461189newInvalidatorPull p = return $! InvalidatorPull p
10471190
1048−instance HasSpiderTimeline x => FunctorMaybe (Event x) where
1049− fmapMaybe f = push $ return . f
1191+instance HasSpiderTimeline x => Filterable (Event x) where
1192+ mapMaybe f = push $ return . f
10501193
10511194instance HasSpiderTimeline x => Align (Event x) where
10521195 nil = eventNever
1053− align ea eb = fmapMaybe dmapToThese $ merge $ dynamicConst $ DMap.fromList [LeftTag :=> ea, RightTag :=> eb]
1196+#if MIN_VERSION_these(0, 8, 0)
1197+instance HasSpiderTimeline x => Semialign (Event x) where
1198+#endif
1199+ align ea eb = mapMaybe dmapToThese $ mergeG coerce $ dynamicConst $
1200+ DMap.fromDistinctAscList [LeftTag :=> ea, RightTag :=> eb]
1201+
1202+#ifdef MIN_VERSION_semialign
1203+#if MIN_VERSION_semialign(1,1,0)
1204+instance HasSpiderTimeline x => Zip (Event x) where
1205+#endif
1206+ zip x y = mapMaybe justThese $ align x y
1207+#endif
1208+
1209+data DynType x p = UnsafeDyn !(BehaviorM x (PatchTarget p), Event x p)
1210+ | BuildDyn !(EventM x (PatchTarget p), Event x p)
1211+ | HoldDyn !(Hold x p)
10541212
1055−newtype Dyn x p = Dyn { unDyn :: IORef (Either (BehaviorM x (PatchTarget p), Event x p) (Hold x p)) }
1213+newtype Dyn (x :: Type) p = Dyn { unDyn :: IORef (DynType x p) }
10561214
1057−newMapDyn :: HasSpiderTimeline x => (a -> b) -> Dynamic x (Identity a) -> Dynamic x (Identity b)
1058−newMapDyn f d = dynamicDynIdentity $ unsafeDyn (fmap f $ readBehaviorTracked $ dynamicCurrent d) (Identity . f . runIdentity <$> dynamicUpdated d)
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)
10591217
10601218--TODO: Avoid the duplication between this and R.zipDynWith
1061−zipDynWith :: HasSpiderTimeline x => (a -> b -> c) -> Dynamic x (Identity a) -> Dynamic x (Identity b) -> Dynamic x (Identity c)
1219+zipDynWith :: HasSpiderTimeline x => (a -> b -> c) -> DynamicS x (Identity a) -> DynamicS x (Identity b) -> DynamicS x (Identity c)
10621220zipDynWith f da db =
10631221 let eab = align (dynamicUpdated da) (dynamicUpdated db)
10641222 ec = flip push eab $ \o -> do
@@ -1071,19 +1229,22 @@ zipDynWith f da db =
10711229 return (a, b)
10721230 These (Identity a) (Identity b) -> return (a, b)
10731231 return $ Just $ Identity $ f a b
1074− in dynamicDynIdentity $ unsafeDyn (f <$> readBehaviorUntracked (dynamicCurrent da) <*> readBehaviorUntracked (dynamicCurrent db)) ec
1232+ in dynamicDynIdentity $ unsafeBuildDynamic (f <$> readBehaviorUntracked (dynamicCurrent da) <*> readBehaviorUntracked (dynamicCurrent db)) ec
1233+
1234+buildDynamic :: (Defer (SomeDynInit x) m, Patch p) => EventM x (PatchTarget p) -> Event x p -> m (Dyn x p)
1235+buildDynamic readV0 v' = do
1236+ result <- liftIO $ newIORef $ BuildDyn (readV0, v')
1237+ let !d = Dyn result
1238+ defer $ SomeDynInit d
1239+ return d
10751240
1076−unsafeDyn :: BehaviorM x (PatchTarget p) -> Event x p -> Dyn x p
1077−unsafeDyn readV0 v' = Dyn $ unsafeNewIORef x $ Left x
1078− where x = (readV0, v')
1241+unsafeBuildDynamic :: BehaviorM x (PatchTarget p) -> Event x p -> Dyn x p
1242+unsafeBuildDynamic readV0 v' =
1243+ Dyn $ unsafePerformIO $ newIORef $ UnsafeDyn (readV0, v')
10791244
10801245-- ResultM can read behaviors and events
10811246type ResultM = EventM
10821247
1083−{-# NOINLINE unsafeNewIORef #-}
1084−unsafeNewIORef :: a -> b -> IORef b
1085−unsafeNewIORef _ b = unsafePerformIO $ newIORef b
1086−
10871248instance HasSpiderTimeline x => Functor (Event x) where
10881249 fmap f = push $ return . Just . f
10891250
@@ -1096,33 +1257,42 @@ push f e = cacheEvent (pushCheap f e)
10961257
10971258{-# INLINABLE pull #-}
10981259pull :: BehaviorM x a -> Behavior x a
1099−pull a = behaviorPull $ Pull
1100− { pullCompute = a
1101− , pullValue = unsafeNewIORef a Nothing
1260+pull a = unsafePerformIO $ do
1261+ ref <- newIORef Nothing
11021262#ifdef DEBUG_NODEIDS
1103− , pullNodeId = unsafeNodeId a
1263+ nid <- newNodeId
11041264#endif
1105− }
1265+ pure $ behaviorPull $ Pull
1266+ { pullCompute = a
1267+ , pullValue = ref
1268+#ifdef DEBUG_NODEIDS
1269+ , pullNodeId = nid
1270+#endif
1271+ }
11061272
11071273{-# INLINABLE switch #-}
11081274switch :: HasSpiderTimeline x => Behavior x (Event x a) -> Event x a
1109−switch a = eventSwitch $ Switch
1110− { switchParent = a
1111− , switchSubscribed = unsafeNewIORef a Nothing
1112− }
1275+switch a = unsafePerformIO $ do
1276+ ref <- newIORef Nothing
1277+ pure $ eventSwitch $ Switch
1278+ { switchParent = a
1279+ , switchSubscribed = ref
1280+ }
11131281
11141282coincidence :: HasSpiderTimeline x => Event x (Event x a) -> Event x a
1115−coincidence a = eventCoincidence $ Coincidence
1116− { coincidenceParent = a
1117− , coincidenceSubscribed = unsafeNewIORef a Nothing
1118− }
1283+coincidence a = unsafePerformIO $ do
1284+ ref <- newIORef Nothing
1285+ pure $ eventCoincidence $ Coincidence
1286+ { coincidenceParent = a
1287+ , coincidenceSubscribed = ref
1288+ }
11191289
11201290-- Propagate the given event occurrence; before cleaning up, run the given action, which may read the state of events and behaviors
11211291run :: forall x b. HasSpiderTimeline x => [DSum (RootTrigger x) Identity] -> ResultM x b -> SpiderHost x b
11221292run roots after = do
11231293 tracePropagate (Proxy :: Proxy x) $ "Running an event frame with " <> show (length roots) <> " events"
1124− t <- SpiderHost ask
1125− result <- SpiderHost $ lift $ withMVar (_spiderTimeline_lock t) $ \_ -> flip runReaderT t $ unSpiderHost $ runFrame $ do
1294+ let t = spiderTimeline :: SpiderTimelineEnv x
1295+ result <- SpiderHost $ withMVar (_spiderTimeline_lock (unSTE t)) $ \_ -> unSpiderHost $ runFrame $ do
11261296 rootsToPropagate <- forM roots $ \r@(RootTrigger (_, occRef, k) :=> a) -> do
11271297 occBefore <- liftIO $ do
11281298 occBefore <- readIORef occRef
@@ -1160,9 +1330,11 @@ scheduleMerge' initialHeight heightRef a = scheduleMerge initialHeight $ do
11601330 GT -> scheduleMerge' height heightRef a -- The height has been increased (by a coincidence event; TODO: is this the only way?)
11611331 EQ -> a
11621332
1163−data SomeClear = forall a. SomeClear (IORef (Maybe a))
1333+newtype Clear a = Clear (IORef (Maybe a))
1334+
1335+newtype IntClear a = IntClear (IORef (IntMap a))
11641336
1165−data SomeRootClear = forall k. SomeRootClear (IORef (DMap k Identity))
1337+newtype RootClear k = RootClear (IORef (DMap k Identity))
11661338
11671339data SomeAssignment x = forall a. SomeAssignment {-# UNPACK #-} !(IORef a) {-# UNPACK #-} !(IORef [Weak (Invalidator x)]) a
11681340
@@ -1174,55 +1346,110 @@ mkWeakPtrWithDebug x debugNote = do
11741346 x' <- evaluate x
11751347 mkWeakPtr x' $
11761348 if debugFinalize
1177− then Just $ putStrLn $ "finalizing: " ++ debugNote
1349+ then Just $ debugStrLn $ "finalizing: " ++ debugNote
11781350 else Nothing
11791351
11801352type WeakList a = [Weak a]
11811353
1182−{-# INLINE withIncreasedDepth #-}
1354+type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
1355+
1356+
1357+
1358+
11831359#ifdef DEBUG
1184−withIncreasedDepth :: CanTrace x m => m a -> m a
1185−withIncreasedDepth a = do
1186− spiderTimeline <- askSpiderTimelineEnv
1187− liftIO $ modifyIORef' (_spiderTimeline_depth spiderTimeline) succ
1360+
1361+debugSubscriber :: forall x a. HasSpiderTimeline x => String -> Subscriber x a -> IO (Subscriber x a)
1362+debugSubscriber description = return . debugSubscriber' description
1363+
1364+debugSubscriber' :: forall x a. HasSpiderTimeline x => String -> Subscriber x a -> Subscriber x a
1365+debugSubscriber' description subscribed = Subscriber
1366+ {
1367+ subscriberPropagate = \m -> do
1368+ tracePropagate (Proxy :: Proxy x) ("subscriberPropagate: " <> description)
1369+ subscriberPropagate subscribed m
1370+ , subscriberInvalidateHeight = \old -> do
1371+ traceInvalidateHeight $ "invalidateSubscriberHeight: " <> description <> ", old = " <> show (unHeight old)
1372+ subscriberInvalidateHeight subscribed old
1373+ traceInvalidateHeight $ "invalidateSubscriberHeight: " <> description <> ", done"
1374+ , subscriberRecalculateHeight = \new -> do
1375+ traceInvalidateHeight $ "subscriberRecalculateHeight: " <> description <> ", new = " <> show (unHeight new)
1376+ subscriberRecalculateHeight subscribed new
1377+ traceInvalidateHeight $ "subscriberRecalculateHeight: " <> description <> ", done"
1378+ }
1379+
1380+
1381+{-# INLINE withIncreasedDepth #-}
1382+withIncreasedDepth :: forall proxy x m a. CanTrace x m => proxy x -> m a -> m a
1383+withIncreasedDepth _ a = do
1384+ liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) succ
11881385 result <- a
1189− liftIO $ modifyIORef' (_spiderTimeline_depth spiderTimeline) pred
1386+ liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) pred
11901387 return result
1191−#else
1192−withIncreasedDepth :: m a -> m a
1193−withIncreasedDepth = id
1194−#endif
1195−
1196−type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
11971388
11981389{-# INLINE tracePropagate #-}
11991390tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1200−tracePropagate p = traceWhen p debugPropagate
1391+tracePropagate p = when debugPropagate . trace p
12011392
12021393{-# INLINE traceInvalidate #-}
12031394traceInvalidate :: String -> IO ()
1204−traceInvalidate = when debugInvalidate . liftIO . putStrLn
1395+traceInvalidate = when debugInvalidate . liftIO . debugStrLn
1396+
1397+{-# INLINE traceInvalidateHeight #-}
1398+traceInvalidateHeight :: String -> IO ()
1399+traceInvalidateHeight = when debugInvalidateHeight . liftIO . debugStrLn
12051400
1206−{-# INLINE traceWhen #-}
1207−traceWhen :: (CanTrace x m) => proxy x -> Bool -> String -> m ()
1208−traceWhen p b message = traceMWhen p b $ return message
1401+{-# INLINE trace #-}
1402+trace :: (CanTrace x m) => proxy x -> String -> m ()
1403+trace p message = traceM p $ return message
12091404
1210−{-# INLINE traceMWhen #-}
1211−traceMWhen :: (CanTrace x m) => proxy x -> Bool -> m String -> m ()
1212−traceMWhen _ b getMessage = when b $ do
1405+{-# INLINE traceM #-}
1406+traceM :: forall x proxy m. (CanTrace x m) => proxy x -> m String -> m ()
1407+traceM _ getMessage = do
12131408 message <- getMessage
1214−#ifdef DEBUG
1215− spiderTimeline <- askSpiderTimelineEnv
1216− d <- liftIO $ readIORef $ _spiderTimeline_depth spiderTimeline
1409+ d <- liftIO $ readIORef $ _spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)
1410+ liftIO $ debugStrLn $ replicate d ' ' <> message
1411+
12171412#else
1218− let d = 0
1413+
1414+{-# INLINE withIncreasedDepth #-}
1415+withIncreasedDepth :: proxy x -> m a -> m a
1416+withIncreasedDepth _ = id
1417+
1418+{-# INLINE tracePropagate #-}
1419+tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1420+tracePropagate _ _ = return ()
1421+
1422+{-# INLINE traceInvalidate #-}
1423+traceInvalidate :: String -> IO ()
1424+traceInvalidate _ = return ()
1425+
1426+{-# INLINE traceInvalidateHeight #-}
1427+traceInvalidateHeight :: String -> IO ()
1428+traceInvalidateHeight _ = return ()
1429+
1430+{-# INLINE debugSubscriber #-}
1431+debugSubscriber :: String -> Subscriber x a -> IO (Subscriber x a)
1432+debugSubscriber _ = return
1433+
1434+{-# INLINE debugSubscriber' #-}
1435+debugSubscriber' :: String -> Subscriber x a -> Subscriber x a
1436+debugSubscriber' _ = id
1437+
1438+
1439+
1440+{-# INLINE trace #-}
1441+trace :: (CanTrace x m) => proxy x -> String -> m ()
1442+trace _ _ = return ()
1443+
1444+{-# INLINE traceM #-}
1445+traceM :: (CanTrace x m) => proxy x -> m String -> m ()
1446+traceM _ _ = return ()
1447+
12191448#endif
1220− liftIO $ putStrLn $ replicate d ' ' <> message
12211449
12221450whoCreatedIORef :: IORef a -> IO [String]
12231451whoCreatedIORef (IORef a) = whoCreated $! a
12241452
1225−#ifdef DEBUG_CYCLES
12261453groupByHead :: Eq a => [NonEmpty a] -> [(a, NonEmpty [a])]
12271454groupByHead = \case
12281455 [] -> []
@@ -1233,20 +1460,54 @@ groupByHead = \case
12331460 | otherwise -> (x, xs :| []) : l
12341461
12351462listsToForest :: Eq a => [[a]] -> Forest a
1236−listsToForest l = fmap (\(a, l') -> Node a $ listsToForest $ toList l') $ groupByHead $ catMaybes $ fmap nonEmpty l
1463+listsToForest lists = buildForest <$> groupByHead (mapMaybe nonEmpty lists)
1464+ where buildForest (a, lists') = Node a $ listsToForest $ toList lists'
1465+
1466+showStacks :: [[String]] -> String
1467+showStacks = drawForest . listsToForest . fmap (filterStack "Reflex.Spider.Internal")
1468+
1469+filterStack :: String -> [String] -> [String]
1470+#ifdef DEBUG_HIDE_INTERNALS
1471+filterStack prefix = filter (not . (prefix `isPrefixOf`))
1472+#else
1473+filterStack prefix = id
1474+#endif
1475+
1476+#ifdef DEBUG_CYCLES
1477+
1478+data EventLoopException = EventLoopException [[String]]
1479+instance Exception EventLoopException
1480+
1481+instance Show EventLoopException where
1482+ show (EventLoopException stacks) = "causality loop detected:\n" <> if null stacks
1483+ then "no location information, compile with profiling enabled for stack tree"
1484+ else showStacks stacks
1485+
1486+#else
1487+
1488+data EventLoopException = EventLoopException
1489+instance Exception EventLoopException
1490+
1491+instance Show EventLoopException where
1492+ show EventLoopException = "causality loop detected: \n" <>
1493+ "compile reflex with flag 'debug-cycles' and compile with profiling enabled for stack tree"
1494+
12371495#endif
12381496
1497+
12391498{-# INLINE propagateSubscriberHold #-}
12401499propagateSubscriberHold :: forall x p. (HasSpiderTimeline x, Patch p) => Hold x p -> p -> EventM x ()
12411500propagateSubscriberHold h a = do
1242− {-# SCC "trace" #-} traceMWhen (Proxy :: Proxy x) debugPropagate $ liftIO $ do
1501+ {-# SCC "trace" #-} when debugPropagate $ traceM (Proxy :: Proxy x) $ liftIO $ do
12431502 invalidators <- liftIO $ readIORef $ holdInvalidators h
12441503 return $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
1504+
12451505 v <- {-# SCC "read" #-} liftIO $ readIORef $ holdValue h
12461506 case {-# SCC "apply" #-} apply a v of
12471507 Nothing -> return ()
12481508 Just v' -> do
1249− {-# SCC "trace2" #-} withIncreasedDepth $ tracePropagate (Proxy :: Proxy x) $ "propagateSubscriberHold: assigning Hold" <> showNodeId h
1509+ {-# SCC "trace2" #-} withIncreasedDepth (Proxy :: Proxy x) $
1510+ tracePropagate (Proxy :: Proxy x) ("propagateSubscriberHold: assigning Hold" <> showNodeId h)
12501511 vRef <- {-# SCC "vRef" #-} liftIO $ evaluate $ holdValue h
12511512 iRef <- {-# SCC "iRef" #-} liftIO $ evaluate $ holdInvalidators h
12521513 defer $ {-# SCC "assignment" #-} SomeAssignment vRef iRef v'
@@ -1254,25 +1515,25 @@ propagateSubscriberHold h a = do
12541515data SomeResetCoincidence x = forall a. SomeResetCoincidence !(EventSubscription x) !(Maybe (CoincidenceSubscribed x a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
12551516
12561517runBehaviorM :: BehaviorM x a -> Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]) -> IORef [SomeHoldInit x] -> IO a
1257−runBehaviorM a mwi holdInits = runReaderT (unBehaviorM a) (mwi, holdInits)
1518+runBehaviorM a mwi holdInits = runReaderIO (unBehaviorM a) (mwi, holdInits)
12581519
12591520askInvalidator :: BehaviorM x (Maybe (Weak (Invalidator x)))
12601521askInvalidator = do
1261− (!m, _) <- BehaviorM ask
1522+ (!m, _) <- ask
12621523 case m of
12631524 Nothing -> return Nothing
12641525 Just (!wi, _) -> return $ Just wi
12651526
12661527askParentsRef :: BehaviorM x (Maybe (IORef [SomeBehaviorSubscribed x]))
12671528askParentsRef = do
1268− (!m, _) <- BehaviorM ask
1529+ (!m, _) <- ask
12691530 case m of
12701531 Nothing -> return Nothing
12711532 Just (_, !p) -> return $ Just p
12721533
12731534askBehaviorHoldInits :: BehaviorM x (IORef [SomeHoldInit x])
12741535askBehaviorHoldInits = do
1275− (_, !his) <- BehaviorM ask
1536+ (_, !his) <- ask
12761537 return his
12771538
12781539{-# INLINE getDynHold #-}
@@ -1280,30 +1541,27 @@ getDynHold :: (Defer (SomeHoldInit x) m, Patch p) => Dyn x p -> m (Hold x p)
12801541getDynHold d = do
12811542 mh <- liftIO $ readIORef $ unDyn d
12821543 case mh of
1283− Right h -> return h
1284− Left (readV0, v') -> do
1544+ HoldDyn h -> return h
1545+ UnsafeDyn (readV0, v') -> do
12851546 holdInits <- getDeferralQueue
12861547 v0 <- liftIO $ runBehaviorM readV0 Nothing holdInits
1548+ hold' v0 v'
1549+ BuildDyn (readV0, v') -> do
1550+ v0 <- liftIO $ runEventM readV0
1551+ hold' v0 v'
1552+ where
1553+ hold' v0 v' = do
12871554 h <- hold v0 v'
1288− liftIO $ writeIORef (unDyn d) $ Right h
1555+ liftIO $ writeIORef (unDyn d) $ HoldDyn h
12891556 return h
12901557
1558+
12911559-- Always refers to 0
12921560{-# NOINLINE zeroRef #-}
12931561zeroRef :: IORef Height
12941562zeroRef = unsafePerformIO $ newIORef zeroHeight
12951563
1296−type CanSubscribe x m =
1297− ( HasSpiderTimeline x
1298− , HasCurrentHeight x m
1299− , Defer (SomeHoldInit x) m, Defer (SomeMergeInit x) m -- The things we need to lazily initialize state
1300− , Defer SomeClear m -- Wiping out event firings
1301− , Defer (SomeAssignment x) m -- Updating state
1302− , Defer (SomeResetCoincidence x) m
1303− , m ~ EventM x
1304− )
1305−
1306−getRootSubscribed :: GCompare k => k a -> Root x k -> Subscriber x a -> IO (WeakBagTicket, RootSubscribed x a, Maybe 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)
13071565getRootSubscribed k r sub = do
13081566 mSubscribed <- readIORef $ rootSubscribed r
13091567 let getOcc = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
@@ -1317,10 +1575,15 @@ getRootSubscribed k r sub = do
13171575 let !cached = rootSubscribed r
13181576 uninitRef <- newIORef $ error "getRootsubscribed: uninitRef not initialized"
13191577 (subs, sln) <- WeakBag.singleton sub weakSelf cleanupRootSubscribed
1320− when debugPropagate $ putStrLn $ "getRootSubscribed: calling rootInit"
1578+
1579+ tracePropagate (Proxy::Proxy x) $ "getRootSubscribed: calling rootInit"
1580+
13211581 uninit <- rootInit r k $ RootTrigger (subs, rootOccurrence r, k)
13221582 writeIORef uninitRef $! uninit
1323− let subscribed = RootSubscribed
1583+#ifdef DEBUG_NODEIDS
1584+ nid <- newNodeId
1585+#endif
1586+ let !subscribed = RootSubscribed
13241587 { rootSubscribedKey = k
13251588 , rootSubscribedCachedSubscribed = cached
13261589 , rootSubscribedOccurrence = getOcc
@@ -1328,17 +1591,29 @@ getRootSubscribed k r sub = do
13281591 , rootSubscribedUninit = uninit
13291592 , rootSubscribedWeakSelf = weakSelf
13301593#ifdef DEBUG_NODEIDS
1331− , rootSubscribedNodeId = unsafeNodeId (k, r, subs)
1594+ , rootSubscribedNodeId = nid
13321595#endif
13331596 }
1334− writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "RootSubscribed"
1597+ -- If we die at the same moment that all our children die, they will
1598+ -- try to clean us up but will fail because their Weak reference to us
1599+ -- will also be dead. So, if we are dying, check if there are any
1600+ -- children; since children don't bother cleaning themselves up if
1601+ -- their parents are already dead, I don't think there's a race
1602+ -- condition here. However, if there are any children, then we can
1603+ -- infer that we need to clean ourselves up, so we do.
1604+ finalCleanup = do
1605+ cs <- readIORef $ _weakBag_children subs
1606+ when (not $ IntMap.null cs) (cleanupRootSubscribed subscribed)
1607+ writeIORef weakSelf =<< evaluate =<< mkWeakPtr subscribed (Just finalCleanup)
13351608 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
13361609 occ <- getOcc
13371610 return (sln, subscribed, occ)
13381611
1612+#ifdef USE_TEMPLATE_HASKELL
13391613{-# ANN cleanupRootSubscribed "HLint: ignore Redundant bracket" #-}
1614+#endif
13401615cleanupRootSubscribed :: RootSubscribed x a -> IO ()
1341−cleanupRootSubscribed self@(RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached }) = do
1616+cleanupRootSubscribed self@RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached } = do
13421617 rootSubscribedUninit self
13431618 modifyIORef' cached $ DMap.delete k
13441619
@@ -1346,8 +1621,90 @@ cleanupRootSubscribed self@(RootSubscribed { rootSubscribedKey = k, rootSubscrib
13461621subscribeRootSubscribed :: RootSubscribed x a -> Subscriber x a -> IO WeakBagTicket
13471622subscribeRootSubscribed subscribed sub = WeakBag.insert sub (rootSubscribedSubscribers subscribed) (rootSubscribedWeakSelf subscribed) cleanupRootSubscribed
13481623
1624+newtype EventSelectorInt x a = EventSelectorInt { selectInt :: Int -> Event x a }
1625+
1626+data FanInt x a = FanInt
1627+ { _fanInt_subscribers :: {-# UNPACK #-} !(FastMutableIntMap (FastWeakBag (Subscriber x a))) --TODO: Clean up the keys in here when their child weak bags get empty --TODO: Remove our own subscription when the subscribers list is completely empty
1628+ , _fanInt_subscriptionRef :: {-# UNPACK #-} !(IORef (EventSubscription x)) -- This should have a valid subscription iff subscribers is non-empty
1629+ , _fanInt_occRef :: {-# UNPACK #-} !(IORef (IntMap a))
1630+#ifdef DEBUG_NODEIDS
1631+ , _fanInt_nodeId :: {-# UNPACK #-} !Int
1632+#endif
1633+ }
1634+
1635+newFanInt :: IO (FanInt x a)
1636+newFanInt = do
1637+ subscribers <- FastMutableIntMap.newEmpty --TODO: Clean up the keys in here when their child weak bags get empty --TODO: Remove our own subscription when the subscribers list is completely empty
1638+ subscriptionRef <- newIORef $ error "fanInt: no subscription"
1639+ occRef <- newIORef $ error "fanInt: no occurrence"
1640+#ifdef DEBUG_NODEIDS
1641+ nodeId <- newNodeId
1642+#endif
1643+ return $ FanInt
1644+ { _fanInt_subscribers = subscribers
1645+ , _fanInt_subscriptionRef = subscriptionRef
1646+ , _fanInt_occRef = occRef
1647+#ifdef DEBUG_NODEIDS
1648+ , _fanInt_nodeId = nodeId
1649+#endif
1650+ }
1651+
1652+fanInt :: HasSpiderTimeline x => Event x (IntMap a) -> EventSelectorInt x a
1653+fanInt p = unsafePerformIO $ do
1654+ self <- newFanInt
1655+ pure $ EventSelectorInt $ \k -> Event $ \sub -> do
1656+ isEmpty <- liftIO $ FastMutableIntMap.isEmpty (_fanInt_subscribers self)
1657+ when isEmpty $ do -- This is the first subscriber, so we need to subscribe to our input
1658+ let desc = "fanInt" <> showNodeId self <> ", k = " <> show k
1659+ (subscription, parentOcc) <- subscribeAndRead p $ debugSubscriber' desc $ Subscriber
1660+ { subscriberPropagate = \m -> do
1661+ liftIO $ writeIORef (_fanInt_occRef self) m
1662+ scheduleIntClear $ _fanInt_occRef self
1663+ FastMutableIntMap.forIntersectionWithImmutable_ (_fanInt_subscribers self) m $ \b v -> --TODO: Do we need to know that no subscribers are being added as we traverse?
1664+ FastWeakBag.traverse_ b $ \s ->
1665+ subscriberPropagate s v
1666+ , subscriberInvalidateHeight = \old ->
1667+ FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1668+ FastWeakBag.traverse_ b $ \s ->
1669+ subscriberInvalidateHeight s old
1670+ , subscriberRecalculateHeight = \new ->
1671+ FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1672+ FastWeakBag.traverse_ b $ \s ->
1673+ subscriberRecalculateHeight s new
1674+ }
1675+ liftIO $ do
1676+ writeIORef (_fanInt_subscriptionRef self) subscription
1677+ writeIORef (_fanInt_occRef self) $ fromMaybe IntMap.empty parentOcc
1678+ scheduleIntClear $ _fanInt_occRef self
1679+ liftIO $ do
1680+ b <- FastMutableIntMap.lookup (_fanInt_subscribers self) k >>= \case
1681+ Nothing -> do
1682+ b <- FastWeakBag.empty
1683+ FastMutableIntMap.insert (_fanInt_subscribers self) k b
1684+ return b
1685+ Just b -> return b
1686+ ticket <- liftIO $ FastWeakBag.insert sub b
1687+ currentOcc <- readIORef (_fanInt_occRef self)
1688+
1689+ subscribed <- fanIntSubscribed ticket self
1690+ return (EventSubscription (FastWeakBag.remove ticket) subscribed, IntMap.lookup k currentOcc)
1691+
1692+fanIntSubscribed :: FastWeakBagTicket k -> FanInt x a -> IO (EventSubscribed x)
1693+fanIntSubscribed ticket self = do
1694+ subscribedParent <- _eventSubscription_subscribed <$> readIORef (_fanInt_subscriptionRef self)
1695+ return $ EventSubscribed
1696+ { eventSubscribedHeightRef = eventSubscribedHeightRef subscribedParent
1697+ , eventSubscribedRetained = toAny (_fanInt_subscriptionRef self, ticket)
1698+#ifdef DEBUG_CYCLES
1699+ , eventSubscribedGetParents = return [subscribedParent]
1700+ , eventSubscribedHasOwnHeightRef = False
1701+ , eventSubscribedWhoCreated = whoCreatedIORef $ _fanInt_subscriptionRef self
1702+#endif
1703+ }
1704+
1705+
13491706{-# INLINABLE getFanSubscribed #-}
1350−getFanSubscribed :: (Defer (SomeAssignment x) m, Defer (SomeHoldInit x) m, Defer (SomeMergeInit x) m, Defer SomeClear m, HasCurrentHeight x m, Defer (SomeResetCoincidence x) m, HasSpiderTimeline x, m ~ EventM x, GCompare k) => k a -> Fan x k -> Subscriber x a -> m (WeakBagTicket, FanSubscribed x k, Maybe a)
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))
13511708getFanSubscribed k f sub = do
13521709 mSubscribed <- liftIO $ readIORef $ fanSubscribed f
13531710 case mSubscribed of
@@ -1365,13 +1722,16 @@ getFanSubscribed k f sub = do
13651722 subscribersRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribersRef not yet initialized"
13661723 occRef <- liftIO $ newIORef parentOcc
13671724 when (isJust parentOcc) $ scheduleClear occRef
1725+#ifdef DEBUG_NODEIDS
1726+ nid <- liftIO newNodeId
1727+#endif
13681728 let subscribed = FanSubscribed
13691729 { fanSubscribedCachedSubscribed = fanSubscribed f
13701730 , fanSubscribedOccurrence = occRef
13711731 , fanSubscribedParent = subscription
13721732 , fanSubscribedSubscribers = subscribersRef
13731733#ifdef DEBUG_NODEIDS
1374− , fanSubscribedNodeId = unsafeNodeId f
1734+ , fanSubscribedNodeId = nid
13751735#endif
13761736 }
13771737 let !self = (k, subscribed)
@@ -1381,7 +1741,7 @@ getFanSubscribed k f sub = do
13811741 liftIO $ writeIORef (fanSubscribed f) $ Just subscribed
13821742 return (slnForSub, subscribed, coerce $ DMap.lookup k =<< parentOcc)
13831743
1384−cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed x k) -> IO ()
1744+cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed x k v) -> IO ()
13851745cleanupFanSubscribed (k, subscribed) = do
13861746 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
13871747 let reducedSubscribers = DMap.delete k subscribers
@@ -1393,7 +1753,7 @@ cleanupFanSubscribed (k, subscribed) = do
13931753 else writeIORef (fanSubscribedSubscribers subscribed) $! reducedSubscribers
13941754
13951755{-# INLINE subscribeFanSubscribed #-}
1396−subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed x k -> Subscriber x a -> IO WeakBagTicket
1756+subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed x k v -> Subscriber x (v a) -> IO WeakBagTicket
13971757subscribeFanSubscribed k subscribed sub = do
13981758 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
13991759 case DMap.lookup k subscribers of
@@ -1406,7 +1766,7 @@ subscribeFanSubscribed k subscribed sub = do
14061766 Just (FanSubscribedChildren list _ weakSelf) -> {-# SCC "hitSubscribeFanSubscribed" #-} WeakBag.insert sub list weakSelf cleanupFanSubscribed
14071767
14081768{-# INLINABLE getSwitchSubscribed #-}
1409−getSwitchSubscribed :: (Defer (SomeHoldInit x) m, Defer (SomeAssignment x) m, Defer (SomeMergeInit x) m, Defer SomeClear m, Defer (SomeResetCoincidence x) m, HasCurrentHeight x m, HasSpiderTimeline x, m ~ EventM x) => Switch x a -> Subscriber x a -> m (WeakBagTicket, SwitchSubscribed x a, Maybe a)
1769+getSwitchSubscribed :: HasSpiderTimeline x => Switch x a -> Subscriber x a -> EventM x (WeakBagTicket, SwitchSubscribed x a, Maybe a)
14101770getSwitchSubscribed s sub = do
14111771 mSubscribed <- liftIO $ readIORef $ switchSubscribed s
14121772 case mSubscribed of
@@ -1431,6 +1791,9 @@ getSwitchSubscribed s sub = do
14311791 when (isJust parentOcc) $ scheduleClear occRef
14321792 weakSelf <- liftIO $ newIORef $ error "getSwitchSubscribed: weakSelf not yet initialized"
14331793 (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupSwitchSubscribed
1794+#ifdef DEBUG_NODEIDS
1795+ nid <- liftIO newNodeId
1796+#endif
14341797 let !subscribed = SwitchSubscribed
14351798 { switchSubscribedCachedSubscribed = switchSubscribed s
14361799 , switchSubscribedOccurrence = occRef
@@ -1443,7 +1806,7 @@ getSwitchSubscribed s sub = do
14431806 , switchSubscribedCurrentParent = subscriptionRef
14441807 , switchSubscribedWeakSelf = weakSelf
14451808#ifdef DEBUG_NODEIDS
1446− , switchSubscribedNodeId = unsafeNodeId s
1809+ , switchSubscribedNodeId = nid
14471810#endif
14481811 }
14491812 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "switchSubscribedWeakSelf"
@@ -1462,7 +1825,7 @@ subscribeSwitchSubscribed :: SwitchSubscribed x a -> Subscriber x a -> IO WeakBa
14621825subscribeSwitchSubscribed subscribed sub = WeakBag.insert sub (switchSubscribedSubscribers subscribed) (switchSubscribedWeakSelf subscribed) cleanupSwitchSubscribed
14631826
14641827{-# INLINABLE getCoincidenceSubscribed #-}
1465−getCoincidenceSubscribed :: forall x a m. (Defer (SomeAssignment x) m, Defer (SomeHoldInit x) m, Defer (SomeMergeInit x) m, Defer SomeClear m, HasCurrentHeight x m, Defer (SomeResetCoincidence x) m, HasSpiderTimeline x, m ~ EventM x) => Coincidence x a -> Subscriber x a -> m (WeakBagTicket, CoincidenceSubscribed x a, Maybe a)
1828+getCoincidenceSubscribed :: forall x a. HasSpiderTimeline x => Coincidence x a -> Subscriber x a -> EventM x (WeakBagTicket, CoincidenceSubscribed x a, Maybe a)
14661829getCoincidenceSubscribed c sub = do
14671830 mSubscribed <- liftIO $ readIORef $ coincidenceSubscribed c
14681831 case mSubscribed of
@@ -1488,6 +1851,9 @@ getCoincidenceSubscribed c sub = do
14881851 scheduleClear innerSubdRef
14891852 weakSelf <- liftIO $ newIORef $ error "getCoincidenceSubscribed: weakSelf not yet implemented"
14901853 (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupCoincidenceSubscribed
1854+#ifdef DEBUG_NODEIDS
1855+ nid <- liftIO newNodeId
1856+#endif
14911857 let subscribed = CoincidenceSubscribed
14921858 { coincidenceSubscribedCachedSubscribed = coincidenceSubscribed c
14931859 , coincidenceSubscribedOccurrence = occRef
@@ -1498,7 +1864,7 @@ getCoincidenceSubscribed c sub = do
14981864 , coincidenceSubscribedInnerParent = innerSubdRef
14991865 , coincidenceSubscribedWeakSelf = weakSelf
15001866#ifdef DEBUG_NODEIDS
1501− , coincidenceSubscribedNodeId = unsafeNodeId c
1867+ , coincidenceSubscribedNodeId = nid
15021868#endif
15031869 }
15041870 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "CoincidenceSubscribed"
@@ -1515,83 +1881,260 @@ cleanupCoincidenceSubscribed subscribed = do
15151881subscribeCoincidenceSubscribed :: CoincidenceSubscribed x a -> Subscriber x a -> IO WeakBagTicket
15161882subscribeCoincidenceSubscribed subscribed sub = WeakBag.insert sub (coincidenceSubscribedSubscribers subscribed) (coincidenceSubscribedWeakSelf subscribed) cleanupCoincidenceSubscribed
15171883
1518−{-# INLINE merge #-}
1519−merge :: forall k x. (HasSpiderTimeline x, GCompare k) => Dynamic x (PatchDMap k (Event x)) -> Event x (DMap k Identity)
1520−merge d = cacheEvent (mergeCheap d)
1884+{-# INLINE mergeG #-}
1885+mergeG :: forall k q x v. (HasSpiderTimeline x, GCompare k)
1886+ => (forall a. q a -> Event x (v a))
1887+ -> DynamicS x (PatchDMap k q) -> Event x (DMap k v)
1888+mergeG nt d = cacheEvent (mergeCheap nt d)
1889+
1890+{-# INLINE mergeWithMove #-}
1891+mergeWithMove :: forall k v q x. (HasSpiderTimeline x, GCompare k)
1892+ => (forall a. q a -> Event x (v a))
1893+ -> DynamicS x (PatchDMapWithMove k q) -> Event x (DMap k v)
1894+mergeWithMove nt d = cacheEvent (mergeCheapWithMove nt d)
15211895
15221896{-# INLINE [1] mergeCheap #-}
1523−mergeCheap :: forall k x. (HasSpiderTimeline x, GCompare k) => Dynamic x (PatchDMap k (Event x)) -> Event x (DMap k Identity)
1524−mergeCheap d = Event $ \sub -> do
1897+mergeCheap
1898+ :: forall k x q v. (HasSpiderTimeline x, GCompare k)
1899+ => (forall a. q a -> Event x (v a))
1900+ -> DynamicS x (PatchDMap k q)
1901+ -> Event x (DMap k v)
1902+mergeCheap nt = mergeGCheap' unMergeSubscribedParent getInitialSubscribers updateMe destroy
1903+ where
1904+ updateMe :: MergeUpdateFunc k v x (PatchDMap k q) (MergeSubscribedParent x)
1905+ updateMe subscriber heightBagRef oldParents (PatchDMap p) = do
1906+ let f (subscriptionsToKill, ps) (k :=> ComposeMaybe me) = do
1907+ (mOldSubd, newPs) <- case me of
1908+ Nothing -> return $ DMap.updateLookupWithKey (\_ _ -> Nothing) k ps
1909+ Just e -> do
1910+ let s = subscriber $ return k
1911+ subscription@(EventSubscription _ subd) <- subscribe (nt e) s
1912+ newParentHeight <- liftIO $ getEventSubscribedHeight subd
1913+ let newParent = MergeSubscribedParent subscription
1914+ liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1915+ return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
1916+ forM_ mOldSubd $ \oldSubd -> do
1917+ oldHeight <- liftIO $ getEventSubscribedHeight $
1918+ _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1919+
1920+ liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1921+ return (maybeToList (unMergeSubscribedParent <$> mOldSubd) ++ subscriptionsToKill, newPs)
1922+ foldM f ([], oldParents) $ DMap.toList p
1923+
1924+ getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParent x)
1925+ getInitialSubscribers initialParents subscriber = do
1926+ subscribers <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1927+ let s = subscriber $ return k
1928+ (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead (nt e) s
1929+ height <- liftIO $ getEventSubscribedHeight parentSubd
1930+ return (fmap (k :=>) parentOcc, height, k :=> MergeSubscribedParent subscription)
1931+ return ( DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1932+ , fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1933+ , DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1934+ )
1935+
1936+ destroy :: MergeDestroyFunc k (MergeSubscribedParent x)
1937+ destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParent sub) -> unsubscribe sub
1938+
1939+{-# INLINE [1] mergeCheapWithMove #-}
1940+mergeCheapWithMove :: forall k x v q. (HasSpiderTimeline x, GCompare k)
1941+ => (forall a. q a -> Event x (v a))
1942+ -> DynamicS x (PatchDMapWithMove k q)
1943+ -> Event x (DMap k v)
1944+mergeCheapWithMove nt = mergeGCheap' _mergeSubscribedParentWithMove_subscription getInitialSubscribers updateMe destroy
1945+ where
1946+ updateMe :: MergeUpdateFunc k v x (PatchDMapWithMove k q) (MergeSubscribedParentWithMove x k)
1947+ updateMe subscriber heightBagRef oldParents p = do
1948+ -- Prepare new parents for insertion
1949+ let subscribeParent :: forall a. k a -> Event x (v a) -> EventM x (MergeSubscribedParentWithMove x k a)
1950+ subscribeParent k e = do
1951+ keyRef <- liftIO $ newIORef k
1952+ let s = subscriber $ liftIO $ readIORef keyRef
1953+ subscription@(EventSubscription _ subd) <- subscribe e s
1954+ liftIO $ do
1955+ newParentHeight <- getEventSubscribedHeight subd
1956+ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1957+ return $ MergeSubscribedParentWithMove subscription keyRef
1958+ p' <- PatchDMapWithMove.traversePatchDMapWithMoveWithKey (\k q -> subscribeParent k (nt q)) p
1959+ -- Collect old parents for deletion and update the keys of moved parents
1960+ let moveOrDelete :: forall a. k a -> PatchDMapWithMove.NodeInfo k q a -> MergeSubscribedParentWithMove x k a -> Constant (EventM x (Maybe (EventSubscription x))) a
1961+ moveOrDelete _ ni parent = Constant $ case getComposeMaybe $ PatchDMapWithMove._nodeInfo_to ni of
1962+ Nothing -> do
1963+ oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $
1964+ _mergeSubscribedParentWithMove_subscription parent
1965+
1966+ liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1967+ return $ Just $ _mergeSubscribedParentWithMove_subscription parent
1968+ Just toKey -> do
1969+ liftIO $ writeIORef (_mergeSubscribedParentWithMove_key parent) $! toKey
1970+ return Nothing
1971+ toDelete <- fmap catMaybes $ mapM (\(_ :=> v) -> getConstant v) $ DMap.toList $
1972+ DMap.intersectionWithKey moveOrDelete (unPatchDMapWithMove p) oldParents
1973+
1974+ return (toDelete, applyAlways p' oldParents)
1975+ getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParentWithMove x k)
1976+ getInitialSubscribers initialParents subscriber = do
1977+ subscribers <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1978+ keyRef <- liftIO $ newIORef k
1979+ let s = subscriber $ liftIO $ readIORef keyRef
1980+ (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead (nt e) s
1981+ height <- liftIO $ getEventSubscribedHeight parentSubd
1982+ return (fmap (k :=>) parentOcc, height, k :=> MergeSubscribedParentWithMove subscription keyRef)
1983+ return ( DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1984+ , fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1985+ , DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1986+ )
1987+
1988+ destroy :: MergeDestroyFunc k (MergeSubscribedParentWithMove x k)
1989+ destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParentWithMove sub _) -> unsubscribe sub
1990+
1991+type MergeUpdateFunc k v x p s
1992+ = (forall a. EventM x (k a) -> Subscriber x (v a))
1993+ -> IORef HeightBag
1994+ -> DMap k s
1995+ -> p
1996+ -> EventM x ([EventSubscription x], DMap k s)
1997+
1998+type MergeGetSubscription x s = forall a. s a -> EventSubscription x
1999+
2000+type MergeInitFunc k v q x s
2001+ = DMap k q
2002+ -> (forall a. EventM x (k a) -> Subscriber x (v a))
2003+ -> EventM x (DMap k v, [Height], DMap k s)
2004+
2005+type MergeDestroyFunc k s
2006+ = DMap k s
2007+ -> IO ()
2008+
2009+data Merge x k v s = Merge
2010+ { _merge_parentsRef :: {-# UNPACK #-} !(IORef (DMap k s))
2011+ , _merge_heightBagRef :: {-# UNPACK #-} !(IORef HeightBag)
2012+ , _merge_heightRef :: {-# UNPACK #-} !(IORef Height)
2013+ , _merge_sub :: {-# UNPACK #-} !(Subscriber x (DMap k v))
2014+ , _merge_accumRef :: {-# UNPACK #-} !(IORef (DMap k v))
2015+ }
2016+
2017+invalidateMergeHeight :: Merge x k v s -> IO ()
2018+invalidateMergeHeight m = invalidateMergeHeight' (_merge_heightRef m) (_merge_sub m)
2019+
2020+invalidateMergeHeight' :: IORef Height -> Subscriber x a -> IO ()
2021+invalidateMergeHeight' heightRef sub = do
2022+ oldHeight <- readIORef heightRef
2023+ -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
2024+ when (oldHeight /= invalidHeight) $ do
2025+ writeIORef heightRef $! invalidHeight
2026+ subscriberInvalidateHeight sub oldHeight
2027+
2028+revalidateMergeHeight :: Merge x k v s -> IO ()
2029+revalidateMergeHeight m = do
2030+ currentHeight <- readIORef $ _merge_heightRef m
2031+
2032+ -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
2033+ when (currentHeight == invalidHeight) $ do
2034+ heights <- readIORef $ _merge_heightBagRef m
2035+ parents <- readIORef $ _merge_parentsRef m
2036+ -- When the number of heights in the bag reaches the number of parents, we should have a valid height
2037+ case heightBagSize heights `compare` DMap.size parents of
2038+ LT -> return ()
2039+ EQ -> do
2040+ let height = succHeight $ heightBagMax heights
2041+ traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
2042+ writeIORef (_merge_heightRef m) $! height
2043+ subscriberRecalculateHeight (_merge_sub m) height
2044+ GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show (DMap.size parents) <> ") for Merge"
2045+
2046+scheduleMergeSelf :: HasSpiderTimeline x => Merge x k v s -> Height -> EventM x ()
2047+scheduleMergeSelf m height = scheduleMerge' height (_merge_heightRef m) $ do
2048+ vals <- liftIO $ readIORef $ _merge_accumRef m
2049+ -- Once we're done with this, we can clear it immediately, because if there's a cacheEvent in front of us,
2050+ -- it'll handle subsequent subscribers, and if not, we won't get subsequent subscribers
2051+ liftIO $ writeIORef (_merge_accumRef m) $! DMap.empty
2052+ --TODO: Assert that m is not empty
2053+ subscriberPropagate (_merge_sub m) vals
2054+
2055+checkCycle :: HasSpiderTimeline x => EventSubscribed x -> EventM x ()
2056+checkCycle subscribed = liftIO $ do
2057+ height <- readIORef (eventSubscribedHeightRef subscribed)
2058+
2059+ -- currentHeight <- getCurrentHeight
2060+ -- when (height <= currentHeight) $ if height /= invalidHeight
2061+ -- then do
2062+ -- myStack <- liftIO $ whoCreatedIORef undefined --TODO
2063+ -- error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
2064+ -- else liftIO $
2065+ when (height == invalidHeight) $
2066+#ifdef DEBUG_CYCLES
2067+ do
2068+ nodesInvolvedInCycle <- walkInvalidHeightParents subscribed
2069+ stacks <- forM nodesInvolvedInCycle whoCreatedEventSubscribed
2070+ throwIO (EventLoopException stacks)
2071+#else
2072+ throwIO EventLoopException
2073+#endif
2074+
2075+
2076+mergeSubscriber :: forall x k v s a. (HasSpiderTimeline x, GCompare k) => EventSubscribed x -> Merge x k v s -> EventM x (k a) -> Subscriber x (v a)
2077+mergeSubscriber subscribed m getKey = Subscriber
2078+ { subscriberPropagate = \a -> do
2079+ oldM <- liftIO $ readIORef $ _merge_accumRef m
2080+ k <- getKey
2081+ let newM = DMap.insertWith (error "Same key fired multiple times for Merge") k a oldM
2082+ tracePropagate (Proxy :: Proxy x) $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
2083+ liftIO $ writeIORef (_merge_accumRef m) $! newM
2084+ when (DMap.null oldM) $ do -- Only schedule the firing once
2085+ height <- liftIO $ readIORef $ _merge_heightRef m
2086+ checkCycle subscribed
2087+
2088+ scheduleMergeSelf m height
2089+ , subscriberInvalidateHeight = \old -> do --TODO: When removing a parent doesn't actually change the height, maybe we can avoid invalidating
2090+ modifyIORef' (_merge_heightBagRef m) $ heightBagRemove old
2091+ invalidateMergeHeight m
2092+ , subscriberRecalculateHeight = \new -> do
2093+ modifyIORef' (_merge_heightBagRef m) $ heightBagAdd new
2094+ revalidateMergeHeight m
2095+ }
2096+
2097+--TODO: Be able to run as much of this as possible promptly
2098+updateMerge :: (HasSpiderTimeline x, GCompare k) => EventSubscribed x -> Merge x k v s -> MergeUpdateFunc k v x p s -> p -> SomeMergeUpdate x
2099+updateMerge subscribed m updateFunc p = SomeMergeUpdate updateMe (invalidateMergeHeight m) (revalidateMergeHeight m)
2100+ where updateMe = do
2101+ oldParents <- liftIO $ readIORef $ _merge_parentsRef m
2102+ (subscriptionsToKill, newParents) <- updateFunc (mergeSubscriber subscribed m) (_merge_heightBagRef m) oldParents p
2103+ liftIO $ writeIORef (_merge_parentsRef m) $! newParents
2104+ return subscriptionsToKill
2105+
2106+{-# INLINE mergeGCheap' #-}
2107+mergeGCheap' :: forall k v x p s q. (HasSpiderTimeline x, GCompare k, PatchTarget p ~ DMap k q)
2108+ => MergeGetSubscription x s -> MergeInitFunc k v q x s -> MergeUpdateFunc k v x p s -> MergeDestroyFunc k s -> DynamicS x p -> Event x (DMap k v)
2109+mergeGCheap' getParent getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
15252110 initialParents <- readBehaviorUntracked $ dynamicCurrent d
15262111 accumRef <- liftIO $ newIORef $ error "merge: accumRef not yet initialized"
15272112 heightRef <- liftIO $ newIORef $ error "merge: heightRef not yet initialized"
15282113 heightBagRef <- liftIO $ newIORef $ error "merge: heightBagRef not yet initialized"
1529− parentsRef <- liftIO $ newIORef $ error "merge: parentsRef not yet initialized"
1530− let scheduleSelf height = scheduleMerge' height heightRef $ do
1531− m <- liftIO $ readIORef accumRef
1532− liftIO $ writeIORef accumRef $! DMap.empty
1533− --TODO: Assert that m is not empty
1534− subscriberPropagate sub m
1535− invalidateMyHeight = do
1536− oldHeight <- readIORef heightRef
1537− when (oldHeight /= invalidHeight) $ do -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
1538− writeIORef heightRef $! invalidHeight
1539− subscriberInvalidateHeight sub oldHeight
1540− revalidateMyHeight = do
1541− currentHeight <- readIORef heightRef
1542− when (currentHeight == invalidHeight) $ do -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
1543− heights <- readIORef heightBagRef
1544− parents <- readIORef parentsRef
1545− -- When the number of heights in the bag reaches the number of parents, we should have a valid height
1546− case heightBagSize heights `compare` DMap.size parents of
1547− LT -> return ()
1548− EQ -> do
1549− let height = succHeight $ heightBagMax heights
1550− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
1551− writeIORef heightRef $! height
1552− subscriberRecalculateHeight sub height
1553− GT -> error $ "revalidateMergeHeight: more heights than parents for Merge"
1554− subscriber :: forall a. k a -> Subscriber x a
1555− subscriber k = Subscriber
1556− { subscriberPropagate = \a -> do
1557− oldM <- liftIO $ readIORef accumRef
1558− let newM = DMap.insertWith (error $ "Same key fired multiple times for Merge") k (Identity a) oldM
1559− tracePropagate (Proxy :: Proxy x) $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
1560− liftIO $ writeIORef accumRef $! newM
1561− when (DMap.null oldM) $ do -- Only schedule the firing once
1562− height <- liftIO $ readIORef heightRef
1563− --TODO: assertions about height
1564− currentHeight <- getCurrentHeight
1565− when (height <= currentHeight) $ do
1566− if height /= invalidHeight
1567− then do
1568− myStack <- liftIO $ whoCreatedIORef undefined --TODO
1569− error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
1570− else liftIO $ do
2114+ parentsRef :: IORef (DMap k s) <- liftIO $ newIORef $ error "merge: parentsRef not yet initialized"
2115+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2116+
2117+ let subscribed = EventSubscribed
2118+ { eventSubscribedHeightRef = heightRef
2119+ , eventSubscribedRetained = toAny (parentsRef, changeSubdRef)
15712120#ifdef DEBUG_CYCLES
1572− nodesInvolvedInCycle <- walkInvalidHeightParents $ eventSubscribedMerge subscribed
1573− stacks <- forM nodesInvolvedInCycle $ \(Some.This es) -> whoCreatedEventSubscribed es
1574− let cycleInfo = ":\n" <> drawForest (listsToForest stacks)
1575−#else
1576− let cycleInfo = ""
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
15772126#endif
1578− error $ "Causality loop found" <> cycleInfo
1579− scheduleSelf height
1580− , subscriberInvalidateHeight = \old -> do --TODO: When removing a parent doesn't actually change the height, maybe we can avoid invalidating
1581− modifyIORef' heightBagRef $ heightBagRemove old
1582− invalidateMyHeight
1583− , subscriberRecalculateHeight = \new -> do
1584− modifyIORef' heightBagRef $ heightBagAdd new
1585− revalidateMyHeight
2127+ }
2128+
2129+ m = Merge
2130+ { _merge_parentsRef = parentsRef
2131+ , _merge_heightBagRef = heightBagRef
2132+ , _merge_heightRef = heightRef
2133+ , _merge_sub = sub
2134+ , _merge_accumRef = accumRef
15862135 }
1587− subscribers :: [(Maybe (DSum k Identity), Height, DSum k (MergeSubscribedParent x))] <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1588− let s = subscriber k
1589− (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead e s
1590− height <- liftIO $ getEventSubscribedHeight parentSubd
1591− return $ (fmap (\x -> k :=> Identity x) parentOcc, height, k :=> MergeSubscribedParent subscription)
1592− let dm = DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1593− heights = fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1594− myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
2136+ (dm, heights, initialParentState) <- getInitialSubscribers initialParents $ mergeSubscriber subscribed m
2137+ let myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
15952138 myHeight = if invalidHeight `elem` heights
15962139 then invalidHeight
15972140 else succHeight $ heightBagMax myHeightBag
@@ -1599,132 +2142,236 @@ mergeCheap d = Event $ \sub -> do
15992142 let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
16002143 then (if DMap.null dm then Nothing else Just dm, DMap.empty)
16012144 else (Nothing, dm)
1602− unless (DMap.null accum) $ do
1603− scheduleSelf myHeight
1604− occRef <- liftIO $ newIORef occ
1605− when (isJust occ) $ scheduleClear occRef
2145+ unless (DMap.null accum) $ scheduleMergeSelf m myHeight
16062146 liftIO $ writeIORef accumRef $! accum
16072147 liftIO $ writeIORef heightRef $! myHeight
16082148 liftIO $ writeIORef heightBagRef $! myHeightBag
2149+ liftIO $ writeIORef parentsRef $! initialParentState
2150+ defer $ SomeMergeInit $ do
2151+ let changeSubscriber = Subscriber
2152+ { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
2153+ tracePropagate (Proxy :: Proxy x) "SubscriberMerge/Change"
2154+ defer $ updateMerge subscribed m updateFunc a
2155+ , subscriberInvalidateHeight = \_ -> return ()
2156+ , subscriberRecalculateHeight = \_ -> return ()
2157+ }
2158+ (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
2159+ forM_ change $ \c -> defer $ updateMerge subscribed m updateFunc c
2160+ -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
2161+ -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
2162+ -- its subscription.
2163+ liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
2164+ let unsubscribeAll = destroy =<< readIORef parentsRef
2165+
2166+ return (EventSubscription unsubscribeAll subscribed, occ)
2167+
2168+
2169+mergeInt :: forall x a. (HasSpiderTimeline x) => DynamicS x (PatchIntMap (Event x a)) -> Event x (IntMap a)
2170+mergeInt = cacheEvent . mergeIntCheap
2171+
2172+{-# INLINABLE mergeIntCheap #-}
2173+mergeIntCheap :: forall x a. (HasSpiderTimeline x) => DynamicS x (PatchIntMap (Event x a)) -> Event x (IntMap a)
2174+mergeIntCheap d = Event $ \sub -> do
2175+ initialParents <- readBehaviorUntracked $ dynamicCurrent d
2176+ accum <- liftIO $ FastMutableIntMap.newEmpty
2177+ heightRef <- liftIO $ newIORef zeroHeight
2178+ heightBagRef <- liftIO $ newIORef heightBagEmpty
2179+ parents <- liftIO $ FastMutableIntMap.newEmpty
16092180 changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
1610− liftIO $ writeIORef parentsRef $! DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1611− let updateMe (PatchDMap p) = do
1612− oldParents <- liftIO $ readIORef parentsRef
1613− let f (subscriptionsToKill, ps) (k :=> ComposeMaybe me) = do
1614− (mOldSubd, newPs) <- case me of
1615− Nothing -> return $ DMap.updateLookupWithKey (\_ _ -> Nothing) k ps
1616− Just e -> do
1617− let s = subscriber k
1618− subscription@(EventSubscription _ subd) <- subscribe e s
1619− newParentHeight <- liftIO $ getEventSubscribedHeight subd
1620− let newParent = MergeSubscribedParent subscription
1621− liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1622− return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
1623− forM_ mOldSubd $ \oldSubd -> do
1624− oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1625− liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1626− return (maybeToList (unMergeSubscribedParent <$> mOldSubd) ++ subscriptionsToKill, newPs)
1627− (subscriptionsToKill, newParents) <- foldM f ([], oldParents) $ DMap.toList p --TODO: I think this runEventM is OK, since no events are firing at this time, but it might not be
1628− liftIO $ writeIORef parentsRef $! newParents
1629− return subscriptionsToKill
2181+ let subscribed = EventSubscribed
2182+ { eventSubscribedHeightRef = heightRef
2183+ , eventSubscribedRetained = toAny (parents, changeSubdRef)
2184+#ifdef DEBUG_CYCLES
2185+ , eventSubscribedGetParents = fmap (_eventSubscription_subscribed . snd) <$> FastMutableIntMap.toList parents
2186+ , eventSubscribedHasOwnHeightRef = False
2187+ , eventSubscribedWhoCreated = whoCreatedIORef heightRef
2188+#endif
2189+ }
2190+ let scheduleSelf = do
2191+ height <- liftIO $ readIORef $ heightRef
2192+ scheduleMerge' height heightRef $ do
2193+ vals <- liftIO $ FastMutableIntMap.getFrozenAndClear accum
2194+ subscriberPropagate sub vals
2195+ invalidateMyHeight = invalidateMergeHeight' heightRef sub
2196+ recalculateMyHeight = do
2197+ currentHeight <- readIORef heightRef
2198+ when (currentHeight == invalidHeight) $ do --TODO: This will almost always be true; can we get rid of this check and just proceed to the next one always?
2199+ heights <- readIORef heightBagRef
2200+ numParents <- FastMutableIntMap.size parents
2201+ case heightBagSize heights `compare` numParents of
2202+ LT -> return ()
2203+ EQ -> do
2204+ let height = succHeight $ heightBagMax heights
2205+ traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
2206+ writeIORef heightRef $! height
2207+ subscriberRecalculateHeight sub height
2208+ GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show numParents <> ") for Merge"
2209+ mySubscriber k = Subscriber
2210+ { subscriberPropagate = \a -> do
2211+ checkCycle subscribed
2212+
2213+ wasEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
2214+ liftIO $ FastMutableIntMap.insert accum k a
2215+ when wasEmpty scheduleSelf
2216+ , subscriberInvalidateHeight = \old -> do
2217+ modifyIORef' heightBagRef $ heightBagRemove old
2218+ invalidateMyHeight
2219+ , subscriberRecalculateHeight = \new -> do
2220+ modifyIORef' heightBagRef $ heightBagAdd new
2221+ recalculateMyHeight
2222+ }
2223+ forM_ (IntMap.toList initialParents) $ \(k, p) -> do
2224+ (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead p $ mySubscriber k
2225+ liftIO $ do
2226+ forM_ parentOcc $ FastMutableIntMap.insert accum k
2227+ FastMutableIntMap.insert parents k subscription
2228+ height <- getEventSubscribedHeight parentSubd
2229+ if height == invalidHeight
2230+ then writeIORef heightRef invalidHeight
2231+ else do
2232+ modifyIORef' heightBagRef $ heightBagAdd height
2233+ modifyIORef' heightRef $ \oldHeight ->
2234+ if oldHeight == invalidHeight
2235+ then invalidHeight
2236+ else max (succHeight height) oldHeight
2237+ myHeight <- liftIO $ readIORef heightRef
2238+ currentHeight <- getCurrentHeight
2239+ isEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
2240+ occ <- if currentHeight >= myHeight -- If we should have fired by now
2241+ then if isEmpty
2242+ then return Nothing
2243+ else liftIO $ Just <$> FastMutableIntMap.getFrozenAndClear accum
2244+ else do when (not isEmpty) scheduleSelf -- We have things accumulated, but we shouldn't have fired them yet
2245+ return Nothing
16302246 defer $ SomeMergeInit $ do
1631− let s = Subscriber
2247+ let updateMe a = SomeMergeUpdate u invalidateMyHeight recalculateMyHeight
2248+ where
2249+ u = do
2250+ let f k newParent = do
2251+ subscription@(EventSubscription _ subd) <- subscribe newParent $ mySubscriber k
2252+ newParentHeight <- liftIO $ getEventSubscribedHeight subd
2253+ liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
2254+ return subscription
2255+ newSubscriptions <- FastMutableIntMap.traverseIntMapPatchWithKey f a
2256+ oldParents <- liftIO $ FastMutableIntMap.applyPatch parents newSubscriptions
2257+ liftIO $ for_ oldParents $ \oldParent -> do
2258+ oldParentHeight <- getEventSubscribedHeight $ _eventSubscription_subscribed oldParent
2259+
2260+ print ("updateMe", oldParentHeight)
2261+ modifyIORef' heightBagRef $ heightBagRemove oldParentHeight
2262+ return $ IntMap.elems oldParents
2263+ let changeSubscriber = Subscriber
16322264 { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
1633− tracePropagate (Proxy :: Proxy x) $ "SubscriberMerge/Change"
1634− defer $ SomeMergeUpdate (updateMe a) invalidateMyHeight revalidateMyHeight
2265+ tracePropagate (Proxy :: Proxy x) $ "SubscriberMergeInt/Change"
2266+ defer $ updateMe a
16352267 , subscriberInvalidateHeight = \_ -> return ()
16362268 , subscriberRecalculateHeight = \_ -> return ()
16372269 }
1638− (EventSubscription _ changeSubd, change) <- subscribeAndRead (dynamicUpdated d) s
1639− forM_ change $ \c -> defer $ SomeMergeUpdate (updateMe c) invalidateMyHeight revalidateMyHeight
1640− liftIO $ writeIORef changeSubdRef (s, changeSubd)
1641− let unsubscribeAll = do
1642− parents <- readIORef parentsRef
1643− forM_ (DMap.toList parents) $ \(_ :=> MergeSubscribedParent s) -> unsubscribe s
1644− return ( EventSubscription unsubscribeAll $ EventSubscribed heightRef $ toAny (parentsRef, changeSubdRef)
1645− , occ
1646− )
2270+ (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
2271+ forM_ change $ \c -> defer $ updateMe c
2272+ -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
2273+ -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
2274+ -- its subscription.
2275+ liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
2276+ let unsubscribeAll = traverse_ unsubscribe =<< FastMutableIntMap.getFrozenAndClear parents
2277+
2278+
2279+ return (EventSubscription unsubscribeAll subscribed, occ)
16472280
16482281newtype EventSelector x k = EventSelector { select :: forall a. k a -> Event x a }
2282+newtype EventSelectorG x k v = EventSelectorG { selectG :: forall a. k a -> Event x (v a) }
16492283
1650−fan :: (HasSpiderTimeline x, GCompare k) => Event x (DMap k Identity) -> EventSelector x k
1651−fan e =
2284+fanG :: (HasSpiderTimeline x, GCompare k) => Event x (DMap k v) -> EventSelectorG x k v
2285+fanG e = unsafePerformIO $ do
2286+ ref <- newIORef Nothing
16522287 let f = Fan
16532288 { fanParent = e
1654− , fanSubscribed = unsafeNewIORef e Nothing
2289+ , fanSubscribed = ref
16552290 }
1656− in EventSelector $ \k -> eventFan k f
2291+ pure $ EventSelectorG $ \k -> eventFan k f
16572292
1658−runHoldInits :: HasSpiderTimeline x => IORef [SomeHoldInit x] -> IORef [SomeMergeInit x] -> EventM x ()
1659−runHoldInits holdInitRef mergeInitRef = do
2293+runHoldInits :: HasSpiderTimeline x => IORef [SomeHoldInit x] -> IORef [SomeDynInit x] -> IORef [SomeMergeInit x] -> EventM x ()
2294+runHoldInits holdInitRef dynInitRef mergeInitRef = do
16602295 holdInits <- liftIO $ readIORef holdInitRef
2296+ dynInits <- liftIO $ readIORef dynInitRef
16612297 mergeInits <- liftIO $ readIORef mergeInitRef
1662− unless (null holdInits && null mergeInits) $ do
2298+ unless (null holdInits && null dynInits && null mergeInits) $ do
16632299 liftIO $ writeIORef holdInitRef []
2300+ liftIO $ writeIORef dynInitRef []
16642301 liftIO $ writeIORef mergeInitRef []
16652302 mapM_ initHold holdInits
2303+ mapM_ initDyn dynInits
16662304 mapM_ unSomeMergeInit mergeInits
1667− runHoldInits holdInitRef mergeInitRef
2305+ runHoldInits holdInitRef dynInitRef mergeInitRef
16682306
16692307initHold :: HasSpiderTimeline x => SomeHoldInit x -> EventM x ()
16702308initHold (SomeHoldInit h) = void $ getHoldEventSubscription h
16712309
2310+initDyn :: HasSpiderTimeline x => SomeDynInit x -> EventM x ()
2311+initDyn (SomeDynInit d) = void $ getDynHold d
2312+
16722313newEventEnv :: IO (EventEnv x)
16732314newEventEnv = do
16742315 toAssignRef <- newIORef [] -- This should only actually get used when events are firing
16752316 holdInitRef <- newIORef []
2317+ dynInitRef <- newIORef []
16762318 mergeUpdateRef <- newIORef []
16772319 mergeInitRef <- newIORef []
16782320 heightRef <- newIORef zeroHeight
16792321 toClearRef <- newIORef []
2322+ toClearIntRef <- newIORef []
16802323 toClearRootRef <- newIORef []
16812324 coincidenceInfosRef <- newIORef []
16822325 delayedRef <- newIORef IntMap.empty
1683− return $ EventEnv toAssignRef holdInitRef mergeUpdateRef mergeInitRef toClearRef toClearRootRef heightRef coincidenceInfosRef delayedRef
2326+ return $ EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef
16842327
16852328clearEventEnv :: EventEnv x -> IO ()
1686−clearEventEnv (EventEnv toAssignRef holdInitRef mergeUpdateRef mergeInitRef toClearRef toClearRootRef heightRef coincidenceInfosRef delayedRef) = do
2329+clearEventEnv (EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef) = do
16872330 writeIORef toAssignRef []
16882331 writeIORef holdInitRef []
2332+ writeIORef dynInitRef []
16892333 writeIORef mergeUpdateRef []
16902334 writeIORef mergeInitRef []
16912335 writeIORef heightRef zeroHeight
16922336 writeIORef toClearRef []
2337+ writeIORef toClearIntRef []
16932338 writeIORef toClearRootRef []
16942339 writeIORef coincidenceInfosRef []
16952340 writeIORef delayedRef IntMap.empty
16962341
16972342-- | Run an event action outside of a frame
16982343runFrame :: forall x a. HasSpiderTimeline x => EventM x a -> SpiderHost x a --TODO: This function also needs to hold the mutex
1699−runFrame a = SpiderHost $ ask >>= \_ -> lift $ do
1700− let env = _spiderTimeline_eventEnv (spiderTimeline :: SpiderTimelineEnv x)
2344+runFrame a = SpiderHost $ do
2345+ let env = _spiderTimeline_eventEnv $ unSTE (spiderTimeline :: SpiderTimelineEnv x)
17012346 let go = do
17022347 result <- a
1703− runHoldInits (eventEnvHoldInits 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
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
17042349 return result
17052350 result <- runEventM go
17062351 toClear <- readIORef $ eventEnvClears env
1707− forM_ toClear $ \(SomeClear ref) -> {-# SCC "clear" #-} writeIORef ref Nothing
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
17082355 toClearRoot <- readIORef $ eventEnvRootClears env
1709− forM_ toClearRoot $ \(SomeRootClear ref) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
2356+ forM_ toClearRoot $ \(Some (RootClear ref)) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
17102357 toAssign <- readIORef $ eventEnvAssignments env
17112358 toReconnectRef <- newIORef []
17122359 coincidenceInfos <- readIORef $ eventEnvResetCoincidences env
17132360 forM_ toAssign $ \(SomeAssignment vRef iRef v) -> {-# SCC "assignment" #-} do
17142361 writeIORef vRef v
1715− when debugInvalidate $ putStrLn $ "Invalidating Hold"
2362+ traceInvalidate $ "Invalidating Hold"
17162363 writeIORef iRef =<< evaluate =<< invalidate toReconnectRef =<< readIORef iRef
17172364 mergeUpdates <- readIORef $ eventEnvMergeUpdates env
17182365 writeIORef (eventEnvMergeUpdates env) []
1719− when debugPropagate $ putStrLn "Updating merges"
2366+ tracePropagate (Proxy::Proxy x) $ "Updating merges"
17202367 mergeSubscriptionsToKill <- runEventM $ concat <$> mapM _someMergeUpdate_update mergeUpdates
1721− when debugPropagate $ putStrLn "Updating merges done"
2368+ tracePropagate (Proxy::Proxy x) $ "Updating merges done"
17222369 toReconnect <- readIORef toReconnectRef
17232370 clearEventEnv env
17242371 switchSubscriptionsToKill <- forM toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
17252372 oldSubscription <- readIORef $ switchSubscribedCurrentParent subscribed
17262373 wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
1727− when debugInvalidate $ putStrLn $ "Finalizing invalidator for Switch" <> showNodeId subscribed
2374+ traceInvalidate $ "Finalizing invalidator for Switch" <> showNodeId subscribed
17282375 finalize wi
17292376 i <- evaluate $ switchSubscribedOwnInvalidator subscribed
17302377 wi' <- mkWeakPtrWithDebug i "wi'"
@@ -1732,13 +2379,13 @@ runFrame a = SpiderHost $ ask >>= \_ -> lift $ do
17322379 writeIORef (switchSubscribedBehaviorParents subscribed) []
17332380 writeIORef (eventEnvHoldInits env) [] --TODO: Should we reuse this?
17342381 e <- runBehaviorM (readBehaviorTracked (switchSubscribedParent subscribed)) (Just (wi', switchSubscribedBehaviorParents subscribed)) $ eventEnvHoldInits env
1735− runEventM $ runHoldInits (eventEnvHoldInits 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
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
17362383 --TODO: Make sure we touch the pieces of the SwitchSubscribed at the appropriate times
17372384 sub <- newSubscriberSwitch subscribed
1738− subscription <- runReaderT (unSpiderHost (runFrame ({-# SCC "subscribeSwitch" #-} subscribe e sub))) spiderTimeline --TODO: Assert that the event isn't firing --TODO: This should not loop because none of the events should be firing, but still, it is inefficient
2385+ subscription <- unSpiderHost $ runFrame $ {-# SCC "subscribeSwitch" #-} subscribe e sub --TODO: Assert that the event isn't firing --TODO: This should not loop because none of the events should be firing, but still, it is inefficient
17392386 {-
17402387 stackTrace <- liftIO $ fmap renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
1741− liftIO $ putStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
2388+ liftIO $ debugStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
17422389 EventRoot _ -> "EventRoot"
17432390 EventNever -> "EventNever"
17442391 _ -> "something else"
@@ -1753,7 +2400,7 @@ runFrame a = SpiderHost $ ask >>= \_ -> lift $ do
17532400 myHeight <- readIORef $ switchSubscribedHeight subscribed
17542401 when (parentHeight /= myHeight) $ do
17552402 writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
1756− WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
2403+ WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
17572404 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
17582405 forM_ coincidenceInfos $ \(SomeResetCoincidence subscription mcs) -> do
17592406 unsubscribe subscription
@@ -1794,7 +2441,7 @@ invalidateCoincidenceHeight subscribed = do
17942441 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
17952442 when (oldHeight /= invalidHeight) $ do
17962443 writeIORef (coincidenceSubscribedHeight subscribed) $! invalidHeight
1797− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
2444+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
17982445
17992446updateSwitchHeight :: Height -> SwitchSubscribed x a -> IO ()
18002447updateSwitchHeight new subscribed = do
@@ -1802,7 +2449,7 @@ updateSwitchHeight new subscribed = do
18022449 when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
18032450 when (new /= invalidHeight) $ do --TODO: This 'when' should probably be an assertion
18042451 writeIORef (switchSubscribedHeight subscribed) $! new
1805− WeakBag.traverse (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
2452+ WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
18062453
18072454recalculateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
18082455recalculateCoincidenceHeight subscribed = do
@@ -1811,7 +2458,7 @@ recalculateCoincidenceHeight subscribed = do
18112458 height <- calculateCoincidenceHeight subscribed
18122459 when (height /= invalidHeight) $ do
18132460 writeIORef (coincidenceSubscribedHeight subscribed) $! height
1814− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
2461+ WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
18152462
18162463calculateSwitchHeight :: SwitchSubscribed x a -> IO Height
18172464calculateSwitchHeight subscribed = getEventSubscribedHeight . _eventSubscription_subscribed =<< readIORef (switchSubscribedCurrentParent subscribed)
@@ -1850,14 +2497,219 @@ invalidate toReconnectRef wis = do
18502497-- Reflex integration
18512498--------------------------------------------------------------------------------
18522499
1853−#ifndef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
1854−-- When we're specializing, we include this from Reflex.Class instead, because
1855−-- it needs access to these types; when we're not, we want them here, so our
1856−-- instance isn't an orphan instance.
1857−#include "SpiderTimeline.include.hs"
1858−#include "SpiderTimelineHost.include.hs"
2500+-- | Designates the default, global Spider timeline
2501+data SpiderTimeline x
2502+type role SpiderTimeline nominal
2503+
2504+-- | The default, global Spider environment
2505+type Spider = SpiderTimeline Global
2506+
2507+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (EventM x) where
2508+ {-# INLINABLE sample #-}
2509+ sample (SpiderBehavior b) = readBehaviorUntracked b
2510+
2511+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (EventM x) where
2512+ {-# INLINABLE hold #-}
2513+ hold = holdSpiderEventM
2514+ {-# INLINABLE holdDyn #-}
2515+ holdDyn = holdDynSpiderEventM
2516+ {-# INLINABLE holdIncremental #-}
2517+ holdIncremental = holdIncrementalSpiderEventM
2518+ {-# INLINABLE buildDynamic #-}
2519+ buildDynamic = buildDynamicSpiderEventM
2520+ {-# INLINABLE headE #-}
2521+ headE = R.slowHeadE
2522+-- headE (SpiderEvent e) = SpiderEvent <$> Reflex.Spider.Internal.headE e
2523+ {-# INLINABLE now #-}
2524+ now = nowSpiderEventM
2525+
2526+instance Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPullM x) where
2527+ {-# INLINABLE sample #-}
2528+ sample = coerce . readBehaviorTracked . unSpiderBehavior
2529+
2530+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPushM x) where
2531+ {-# INLINABLE sample #-}
2532+ sample (SpiderBehavior b) = SpiderPushM $ readBehaviorUntracked b
2533+
2534+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderPushM x) where
2535+ {-# INLINABLE hold #-}
2536+ hold v0 e = Reflex.Class.current <$> Reflex.Class.holdDyn v0 e
2537+ {-# INLINABLE holdDyn #-}
2538+ holdDyn v0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce e
2539+ {-# INLINABLE holdIncremental #-}
2540+ holdIncremental v0 (SpiderEvent e) = SpiderPushM $ SpiderIncremental . dynamicHold <$> Reflex.Spider.Internal.hold v0 e
2541+ {-# INLINABLE buildDynamic #-}
2542+ buildDynamic getV0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce e
2543+ {-# INLINABLE headE #-}
2544+ headE = R.slowHeadE
2545+-- headE (SpiderEvent e) = SpiderPushM $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2546+ {-# INLINABLE now #-}
2547+ now = SpiderPushM nowSpiderEventM
2548+
2549+
2550+instance HasSpiderTimeline x => Monad (Reflex.Class.Dynamic (SpiderTimeline x)) where
2551+ {-# INLINE return #-}
2552+ return = pure
2553+ {-# INLINE (>>=) #-}
2554+ x >>= f = SpiderDynamic $ dynamicDynIdentity $ newJoinDyn $ newMapDyn (unSpiderDynamic . f) $ unSpiderDynamic x
2555+ {-# INLINE (>>) #-}
2556+ (>>) = (*>)
2557+#if !MIN_VERSION_base(4,13,0)
2558+ {-# INLINE fail #-}
2559+ fail _ = error "Dynamic does not support 'fail'"
18592560#endif
18602561
2562+{-# INLINABLE newJoinDyn #-}
2563+newJoinDyn :: HasSpiderTimeline x => DynamicS x (Identity (DynamicS x (Identity a))) -> Reflex.Spider.Internal.Dyn x (Identity a)
2564+newJoinDyn d =
2565+ let readV0 = readBehaviorTracked . dynamicCurrent =<< readBehaviorTracked (dynamicCurrent d)
2566+ eOuter = Reflex.Spider.Internal.push (fmap (Just . Identity) . readBehaviorUntracked . dynamicCurrent . runIdentity) $ dynamicUpdated d
2567+ eInner = Reflex.Spider.Internal.switch $ dynamicUpdated <$> dynamicCurrent d
2568+ eBoth = Reflex.Spider.Internal.coincidence $ dynamicUpdated . runIdentity <$> dynamicUpdated d
2569+ v' = unSpiderEvent $ Reflex.Class.leftmost $ map SpiderEvent [eBoth, eOuter, eInner]
2570+ in Reflex.Spider.Internal.unsafeBuildDynamic readV0 v'
2571+
2572+instance HasSpiderTimeline x => Functor (Reflex.Class.Dynamic (SpiderTimeline x)) where
2573+ fmap = mapDynamicSpider
2574+ x <$ d = R.unsafeBuildDynamic (return x) $ x <$ R.updated d
2575+
2576+mapDynamicSpider :: HasSpiderTimeline x => (a -> b) -> Reflex.Class.Dynamic (SpiderTimeline x) a -> Reflex.Class.Dynamic (SpiderTimeline x) b
2577+mapDynamicSpider f = SpiderDynamic . newMapDyn f . unSpiderDynamic
2578+{-# INLINE [1] mapDynamicSpider #-}
2579+
2580+instance HasSpiderTimeline x => Applicative (Reflex.Class.Dynamic (SpiderTimeline x)) where
2581+ pure = SpiderDynamic . dynamicConst
2582+#if MIN_VERSION_base(4,10,0)
2583+ liftA2 f a b = SpiderDynamic $ Reflex.Spider.Internal.zipDynWith f (unSpiderDynamic a) (unSpiderDynamic b)
2584+#endif
2585+ SpiderDynamic a <*> SpiderDynamic b = SpiderDynamic $ Reflex.Spider.Internal.zipDynWith ($) a b
2586+ a *> b = R.unsafeBuildDynamic (R.sample $ R.current b) $ R.leftmost [R.updated b, R.tag (R.current b) $ R.updated a]
2587+ (<*) = flip (*>) -- There are no effects, so order doesn't matter
2588+
2589+holdSpiderEventM :: HasSpiderTimeline x => a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Behavior (SpiderTimeline x) a)
2590+holdSpiderEventM v0 e = fmap (SpiderBehavior . behaviorHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2591+
2592+holdDynSpiderEventM :: HasSpiderTimeline x => a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Dynamic (SpiderTimeline x) a)
2593+holdDynSpiderEventM v0 e = fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2594+
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
2597+
2598+buildDynamicSpiderEventM :: HasSpiderTimeline x => SpiderPushM x a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Dynamic (SpiderTimeline x) a)
2599+buildDynamicSpiderEventM getV0 e = fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce $ unSpiderEvent e
2600+
2601+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderHost x) where
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
2614+
2615+
2616+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHostFrame x) where
2617+ sample = SpiderHostFrame . readBehaviorUntracked . unSpiderBehavior --TODO: This can cause problems with laziness, so we should get rid of it if we can
2618+
2619+instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderHostFrame x) where
2620+ {-# INLINABLE hold #-}
2621+ hold v0 e = SpiderHostFrame $ fmap (SpiderBehavior . behaviorHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2622+ {-# INLINABLE holdDyn #-}
2623+ holdDyn v0 e = SpiderHostFrame $ fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2624+ {-# INLINABLE holdIncremental #-}
2625+ holdIncremental v0 e = SpiderHostFrame $ fmap (SpiderIncremental . dynamicHold) $ Reflex.Spider.Internal.hold v0 $ unSpiderEvent e
2626+ {-# INLINABLE buildDynamic #-}
2627+ buildDynamic getV0 e = SpiderHostFrame $ fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce $ unSpiderEvent e
2628+ {-# INLINABLE headE #-}
2629+ headE = R.slowHeadE
2630+-- headE (SpiderEvent e) = SpiderHostFrame $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2631+ {-# INLINABLE now #-}
2632+ now = SpiderHostFrame Reflex.Class.now
2633+
2634+instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHost x) where
2635+ {-# INLINABLE sample #-}
2636+ sample = runFrame . readBehaviorUntracked . unSpiderBehavior
2637+
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
2641+
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
2655+
2656+--------------------------------------------------------------------------------
2657+-- Deprecated items
2658+--------------------------------------------------------------------------------
2659+
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 #-}
2665+ subscribeEvent e = SpiderHostFrame $ do
2666+ --TODO: Unsubscribe eventually (manually and/or with weak ref)
2667+ val <- liftIO $ newIORef Nothing
2668+ subscription <- subscribe (unSpiderEvent e) $ Subscriber
2669+ { subscriberPropagate = \a -> do
2670+ liftIO $ writeIORef val $ Just a
2671+ scheduleClear val
2672+ , subscriberInvalidateHeight = \_ -> return ()
2673+ , subscriberRecalculateHeight = \_ -> return ()
2674+ }
2675+ return $ SpiderEventHandle
2676+ { spiderEventHandleSubscription = subscription
2677+ , spiderEventHandleValue = val
2678+ }
2679+
2680+instance HasSpiderTimeline x => Reflex.Host.Class.ReflexHost (SpiderTimeline x) where
2681+ type EventTrigger (SpiderTimeline x) = RootTrigger x
2682+ type EventHandle (SpiderTimeline x) = SpiderEventHandle x
2683+ type HostFrame (SpiderTimeline x) = SpiderHostFrame x
2684+
2685+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReadEvent (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2686+ {-# NOINLINE readEvent #-}
2687+ readEvent h = Reflex.Spider.Internal.ReadPhase $ fmap (fmap return) $ liftIO $ do
2688+ result <- readIORef $ spiderEventHandleValue h
2689+ touch h
2690+ return result
2691+
2692+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHost x) where
2693+ newEventWithTrigger = SpiderHost . fmap SpiderEvent . newEventWithTriggerIO
2694+ newFanEventWithTrigger f = SpiderHost $ do
2695+ es <- newFanEventWithTriggerIO f
2696+ return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
2697+
2698+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHostFrame x) where
2699+ newEventWithTrigger = SpiderHostFrame . EventM . liftIO . fmap SpiderEvent . newEventWithTriggerIO
2700+ newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
2701+ es <- newFanEventWithTriggerIO f
2702+ return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
2703+
2704+instance HasSpiderTimeline x => Reflex.Host.Class.MonadSubscribeEvent (SpiderTimeline x) (SpiderHost x) where
2705+ {-# INLINABLE subscribeEvent #-}
2706+ subscribeEvent = runFrame . runSpiderHostFrame . Reflex.Host.Class.subscribeEvent
2707+
2708+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexHost (SpiderTimeline x) (SpiderHost x) where
2709+ type ReadPhase (SpiderHost x) = Reflex.Spider.Internal.ReadPhase x
2710+ fireEventsAndRead es (Reflex.Spider.Internal.ReadPhase a) = run es a
2711+ runHostFrame = runFrame . runSpiderHostFrame
2712+
18612713unsafeNewSpiderTimelineEnv :: forall x. IO (SpiderTimelineEnv x)
18622714unsafeNewSpiderTimelineEnv = do
18632715 lock <- newMVar ()
@@ -1865,7 +2717,7 @@ unsafeNewSpiderTimelineEnv = do
18652717#ifdef DEBUG
18662718 depthRef <- newIORef 0
18672719#endif
1868− return $ SpiderTimelineEnv
2720+ return $ STE $ SpiderTimelineEnv
18692721 { _spiderTimeline_lock = lock
18702722 , _spiderTimeline_eventEnv = env
18712723#ifdef DEBUG
@@ -1875,23 +2727,38 @@ unsafeNewSpiderTimelineEnv = do
18752727
18762728-- | Create a new SpiderTimelineEnv
18772729newSpiderTimeline :: IO (Some SpiderTimelineEnv)
1878−newSpiderTimeline = withSpiderTimeline (pure . Some.This)
2730+newSpiderTimeline = withSpiderTimeline (pure . Some)
2731+
2732+data LocalSpiderTimeline (x :: Type) s
2733+
2734+instance Reifies s (SpiderTimelineEnv x) =>
2735+ HasSpiderTimeline (LocalSpiderTimeline x s) where
2736+ spiderTimeline = localSpiderTimeline Proxy $ reflect (Proxy :: Proxy s)
2737+
2738+localSpiderTimeline
2739+ :: proxy s
2740+ -> SpiderTimelineEnv x
2741+ -> SpiderTimelineEnv (LocalSpiderTimeline x s)
2742+localSpiderTimeline _ = coerce
18792743
18802744-- | Pass a new timeline to the given function.
1881−withSpiderTimeline :: (forall x. SpiderTimelineEnv x -> IO r) -> IO r
1882−withSpiderTimeline k = unsafeNewSpiderTimelineEnv >>= k
2745+withSpiderTimeline :: (forall x. HasSpiderTimeline x => SpiderTimelineEnv x -> IO r) -> IO r
2746+withSpiderTimeline k = do
2747+ env <- unsafeNewSpiderTimelineEnv
2748+ reify env $ \s -> k $ localSpiderTimeline s env
2749+
2750+newtype SpiderPullM (x :: Type) a = SpiderPullM (BehaviorM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
18832751
1884−newtype SpiderPullM x a = SpiderPullM (BehaviorM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2752+type ComputeM = EventM
18852753
1886−newtype SpiderPushM x a = SpiderPushM (ComputeM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2754+newtype SpiderPushM (x :: Type) a = SpiderPushM (ComputeM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
18872755
1888−#ifndef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
18892756instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
18902757 {-# SPECIALIZE instance R.Reflex (SpiderTimeline Global) #-}
18912758 newtype Behavior (SpiderTimeline x) a = SpiderBehavior { unSpiderBehavior :: Behavior x a }
18922759 newtype Event (SpiderTimeline x) a = SpiderEvent { unSpiderEvent :: Event x a }
1893− newtype Dynamic (SpiderTimeline x) a = SpiderDynamic { unSpiderDynamic :: Dynamic x (Identity a) } -- deriving (Functor, Applicative, Monad)
1894− newtype Incremental (SpiderTimeline x) p = SpiderIncremental { unSpiderIncremental :: Dynamic x p }
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 }
18952762 type PullM (SpiderTimeline x) = SpiderPullM x
18962763 type PushM (SpiderTimeline x) = SpiderPushM x
18972764 {-# INLINABLE never #-}
@@ -1900,12 +2767,19 @@ instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
19002767 constant = SpiderBehavior . behaviorConst
19012768 {-# INLINE push #-}
19022769 push f = SpiderEvent . push (coerce f) . unSpiderEvent
2770+ {-# INLINE pushCheap #-}
2771+ pushCheap f = SpiderEvent . pushCheap (coerce f) . unSpiderEvent
19032772 {-# INLINABLE pull #-}
19042773 pull = SpiderBehavior . pull . coerce
1905− {-# INLINABLE merge #-}
1906− merge = SpiderEvent . merge . dynamicConst . (coerce :: DMap k (R.Event (SpiderTimeline x)) -> DMap k (Event x))
1907− {-# INLINABLE fan #-}
1908− fan e = R.EventSelector $ SpiderEvent . select (fan (unSpiderEvent e))
2774+ {-# INLINABLE fanG #-}
2775+ fanG e = R.EventSelectorG $ SpiderEvent . selectG (fanG (unSpiderEvent e))
2776+ {-# INLINABLE mergeG #-}
2777+ mergeG
2778+ :: forall k2 (k :: k2 -> *) q (v :: k2 -> *). GCompare k
2779+ => (forall a. q a -> R.Event (SpiderTimeline x) (v a))
2780+ -> DMap k q
2781+ -> R.Event (SpiderTimeline x) (DMap k v)
2782+ mergeG nt = SpiderEvent . mergeG (unSpiderEvent #. nt) . dynamicConst
19092783 {-# INLINABLE switch #-}
19102784 switch = SpiderEvent . switch . (coerce :: Behavior x (R.Event (SpiderTimeline x) a) -> Behavior x (Event x a)) . unSpiderBehavior
19112785 {-# INLINABLE coincidence #-}
@@ -1913,25 +2787,31 @@ instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
19132787 {-# INLINABLE current #-}
19142788 current = SpiderBehavior . dynamicCurrent . unSpiderDynamic
19152789 {-# INLINABLE updated #-}
1916− updated = SpiderEvent . fmap runIdentity . dynamicUpdated . unSpiderDynamic
2790+ updated = SpiderEvent #. dynamicUpdated .# fmap coerce . unSpiderDynamic
19172791 {-# INLINABLE unsafeBuildDynamic #-}
1918− unsafeBuildDynamic readV0 v' = SpiderDynamic $ dynamicDynIdentity $ unsafeDyn (coerce readV0) $ coerce $ unSpiderEvent v'
2792+ unsafeBuildDynamic readV0 v' = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (coerce readV0) $ coerce $ unSpiderEvent v'
19192793 {-# INLINABLE unsafeBuildIncremental #-}
1920− unsafeBuildIncremental readV0 dv = SpiderIncremental $ dynamicDyn $ unsafeDyn (coerce readV0) $ unSpiderEvent dv
1921− {-# INLINABLE mergeIncremental #-}
1922− mergeIncremental = SpiderEvent . merge . (unsafeCoerce :: Dynamic x (PatchDMap k (R.Event (SpiderTimeline x))) -> Dynamic x (PatchDMap k (Event x))) . unSpiderIncremental
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
19232799 {-# INLINABLE currentIncremental #-}
19242800 currentIncremental = SpiderBehavior . dynamicCurrent . unSpiderIncremental
19252801 {-# INLINABLE updatedIncremental #-}
19262802 updatedIncremental = SpiderEvent . dynamicUpdated . unSpiderIncremental
19272803 {-# INLINABLE incrementalToDynamic #-}
1928− incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ dynamicDynIdentity $ unsafeDyn (readBehaviorUntracked $ dynamicCurrent i) $ flip push (dynamicUpdated i) $ \p -> do
2804+ incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (readBehaviorUntracked $ dynamicCurrent i) $ flip push (dynamicUpdated i) $ \p -> do
19292805 c <- readBehaviorUntracked $ dynamicCurrent i
19302806 return $ Identity <$> apply p c --TODO: Avoid the redundant 'apply'
19312807 eventCoercion Coercion = Coercion
19322808 behaviorCoercion Coercion = Coercion
1933− dynamicCoercion = unsafeCoerce --TODO: How can we avoid this unsafeCoerce? This is safe only because we know how Identity works as a Patch instance
1934−#endif
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))
19352815
19362816data RootTrigger x a = forall k. GCompare k => RootTrigger (WeakBag (Subscriber x a), IORef (DMap k Identity), k a)
19372817
@@ -1954,7 +2834,7 @@ instance MonadAtomicRef (EventM x) where
19542834 atomicModifyRef r f = liftIO $ atomicModifyRef r f
19552835
19562836-- | The monad for actions that manipulate a Spider timeline identified by @x@
1957−newtype SpiderHost x a = SpiderHost { unSpiderHost :: ReaderT (SpiderTimelineEnv x) IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2837+newtype SpiderHost (x :: Type) a = SpiderHost { unSpiderHost :: IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
19582838
19592839instance Monad (SpiderHost x) where
19602840 {-# INLINABLE (>>=) #-}
@@ -1963,20 +2843,27 @@ instance Monad (SpiderHost x) where
19632843 SpiderHost x >> SpiderHost y = SpiderHost $ x >> y
19642844 {-# INLINABLE return #-}
19652845 return x = SpiderHost $ return x
2846+#if !MIN_VERSION_base(4,13,0)
2847+ {-# INLINABLE fail #-}
2848+ fail = MonadFail.fail
2849+#endif
2850+
2851+instance MonadFail (SpiderHost x) where
19662852 {-# INLINABLE fail #-}
1967− fail s = SpiderHost $ fail s
2853+ fail s = SpiderHost $ MonadFail.fail s
19682854
19692855-- | Run an action affecting the global Spider timeline; this will be guarded by
19702856-- a mutex for that timeline
19712857runSpiderHost :: SpiderHost Global a -> IO a
1972−runSpiderHost (SpiderHost a) = runReaderT a globalSpiderTimelineEnv
2858+runSpiderHost (SpiderHost a) = a
19732859
19742860-- | Run an action affecting a given Spider timeline; this will be guarded by a
19752861-- mutex for that timeline
19762862runSpiderHostForTimeline :: SpiderHost x a -> SpiderTimelineEnv x -> IO a
1977−runSpiderHostForTimeline (SpiderHost a) = runReaderT a
2863+runSpiderHostForTimeline (SpiderHost a) _ = a
19782864
1979−newtype SpiderHostFrame x a = SpiderHostFrame { runSpiderHostFrame :: EventM x a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2865+newtype SpiderHostFrame (x :: Type) a = SpiderHostFrame { runSpiderHostFrame :: EventM x a }
2866+ deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
19802867
19812868instance Monad (SpiderHostFrame x) where
19822869 {-# INLINABLE (>>=) #-}
@@ -1985,15 +2872,21 @@ instance Monad (SpiderHostFrame x) where
19852872 SpiderHostFrame x >> SpiderHostFrame y = SpiderHostFrame $ x >> y
19862873 {-# INLINABLE return #-}
19872874 return x = SpiderHostFrame $ return x
2875+#if !MIN_VERSION_base(4,13,0)
19882876 {-# INLINABLE fail #-}
19892877 fail s = SpiderHostFrame $ fail s
2878+#endif
2879+
2880+instance NotReady (SpiderTimeline x) (SpiderHostFrame x) where
2881+ notReadyUntil _ = pure ()
2882+ notReady = pure ()
19902883
1991−newEventWithTriggerIO :: (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
2884+newEventWithTriggerIO :: forall x a. HasSpiderTimeline x => (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
19922885newEventWithTriggerIO f = do
19932886 es <- newFanEventWithTriggerIO $ \Refl -> f
19942887 return $ select es Refl
19952888
1996−newFanEventWithTriggerIO :: GCompare k => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
2889+newFanEventWithTriggerIO :: (HasSpiderTimeline x, GCompare k) => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
19972890newFanEventWithTriggerIO f = do
19982891 occRef <- newIORef DMap.empty
19992892 subscribedRef <- newIORef DMap.empty
@@ -2027,3 +2920,11 @@ instance MonadAtomicRef (SpiderHostFrame x) where
20272920instance PrimMonad (SpiderHostFrame x) where
20282921 type PrimState (SpiderHostFrame x) = PrimState IO
20292922 primitive = SpiderHostFrame . EventM . primitive
2923+
2924+instance NotReady (SpiderTimeline x) (SpiderHost x) where
2925+ notReadyUntil _ = return ()
2926+ notReady = return ()
2927+
2928+instance HasSpiderTimeline x => NotReady (SpiderTimeline x) (PerformEventT (SpiderTimeline x) (SpiderHost x)) where
2929+ notReadyUntil _ = return ()
2930+ notReady = return ()