@@ -9,7 +9,6 @@
99{-# LANGUAGE GADTs #-}
1010{-# LANGUAGE GeneralizedNewtypeDeriving #-}
1111{-# LANGUAGE LambdaCase #-}
12−{-# LANGUAGE MultiWayIf #-}
1312{-# LANGUAGE RankNTypes #-}
1413{-# LANGUAGE RoleAnnotations #-}
1514{-# LANGUAGE ScopedTypeVariables #-}
@@ -20,6 +19,7 @@
2019{-# LANGUAGE DeriveFunctor #-}
2120{-# LANGUAGE StandaloneDeriving #-}
2221{-# LANGUAGE InstanceSigs #-}
22+{-# LANGUAGE MultiWayIf #-}
2323
2424#ifdef USE_REFLEX_OPTIMIZER
2525{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
@@ -38,7 +38,6 @@ import Control.Monad hiding (forM, forM_, mapM, mapM_)
3838import Control.Monad.Exception
3939import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_)
4040import Control.Monad.Primitive
41−--import Control.Monad.Reader hiding (forM, forM_, mapM, mapM_)
4241import Control.Monad.Reader.Class
4342import Control.Monad.IO.Class
4443import Control.Monad.ReaderIO
@@ -47,8 +46,9 @@ import Control.Monad.Fail (MonadFail)
4746import qualified Control.Monad.Fail as MonadFail
4847import Data.Align
4948import Data.Coerce
50−import Data.Dependent.Map (DMap, DSum (..))
49+import Data.Dependent.Map (DMap)
5150import qualified Data.Dependent.Map as DMap
51+import Data.Dependent.Sum (DSum (..))
5252import Data.FastMutableIntMap (FastMutableIntMap, PatchIntMap (..))
5353import qualified Data.FastMutableIntMap as FastMutableIntMap
5454import Data.Foldable hiding (concat, elem, sequence_)
@@ -61,13 +61,13 @@ import qualified Data.IntMap.Strict as IntMap
6161import Data.IORef
6262import Data.Kind (Type)
6363import Data.Maybe hiding (mapMaybe)
64−import Data.Monoid ((<>))
64+import Data.Monoid (mempty, (<>))
6565import Data.Proxy
6666import Data.These
6767import Data.Traversable
6868import Data.Type.Equality ((:~:)(Refl))
6969import Data.Witherable (Filterable, mapMaybe)
70−import GHC.Exts
70+import GHC.Exts hiding (toList)
7171import GHC.IORef (IORef (..))
7272import GHC.Stack
7373import Reflex.FastWeak
@@ -86,14 +86,16 @@ import Data.Zip (Zip (..))
8686
8787#ifdef DEBUG_CYCLES
8888import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
89+#endif
90+
8991import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
9092import qualified Data.List.NonEmpty as NonEmpty
91−import Data.Monoid (mempty)
9293import Data.Tree (Forest, Tree (..), drawForest)
93−#endif
94+import Data.List (isPrefixOf)
9495
95−import Data.FastWeakBag (FastWeakBag)
96+import Data.FastWeakBag (FastWeakBag, FastWeakBagTicket)
9697import qualified Data.FastWeakBag as FastWeakBag
98+
9799import Data.Reflection
98100import Data.Some (Some(Some))
99101import Data.Type.Coercion
@@ -111,14 +113,19 @@ import Reflex.PerformEvent.Base (PerformEventT)
111113#ifdef DEBUG_TRACE_EVENTS
112114import qualified Data.ByteString.Char8 as BS8
113115import System.IO (stderr)
116+import Data.List (isPrefixOf)
114117#endif
115118
116−#ifdef DEBUG_TRACE_EVENTS
119+-- TODO stdout might not be the best channel for debug output
120+debugStrLn :: String -> IO ()
121+debugStrLn = putStrLn
117122
123+#ifdef DEBUG_TRACE_EVENTS
118124withStackOneLine :: (BS8.ByteString -> a) -> a
119125withStackOneLine expr = unsafePerformIO $ do
120126 stack <- currentCallStack
121− return (expr (BS8.pack (unwords (reverse stack))))
127+ return (expr . BS8.pack . unwords . dropInternal . reverse $ stack)
128+ where dropInternal = filterStack "Reflex.Spider.Internal"
122129
123130#endif
124131
@@ -129,28 +136,42 @@ debugInvalidateHeight :: Bool
129136debugInvalidate :: Bool
130137
131138#ifdef DEBUG
132−
133139#define DEBUG_NODEIDS
134140
141+#ifdef DEBUG_TRACE_PROPAGATION
135142debugPropagate = True
143+#else
144+debugPropagate = False
145+#endif
136146
147+#ifdef DEBUG_TRACE_HEIGHT
148+debugInvalidateHeight = True
149+#else
137150debugInvalidateHeight = False
151+#endif
138152
153+#ifdef DEBUG_TRACE_INVALIDATION
139154debugInvalidate = True
155+#else
156+debugInvalidate = False
157+#endif
140158
141159class HasNodeId a where
142160 getNodeId :: a -> Int
143161
144−instance HasNodeId (Hold x p a) where
145− getNodeId = holdNodeId
162+instance HasNodeId (CacheSubscribed x a) where
163+ getNodeId = _cacheSubscribed_nodeId
146164
147−instance HasNodeId (PushSubscribed x a b) where
148− getNodeId = pushSubscribedNodeId
165+instance HasNodeId (FanInt x a) where
166+ getNodeId = _fanInt_nodeId
167+
168+instance HasNodeId (Hold x p) where
169+ getNodeId = holdNodeId
149170
150171instance HasNodeId (SwitchSubscribed x a) where
151172 getNodeId = switchSubscribedNodeId
152173
153−instance HasNodeId (FanSubscribed x a) where
174+instance HasNodeId (FanSubscribed x v a) where
154175 getNodeId = fanSubscribedNodeId
155176
156177instance HasNodeId (CoincidenceSubscribed x a) where
@@ -164,41 +185,16 @@ instance HasNodeId (Pull x a) where
164185
165186{-# INLINE showNodeId #-}
166187showNodeId :: HasNodeId a => a -> String
167−showNodeId = ("#"<>) . show . getNodeId
168−
169−showSubscriberType :: Subscriber x a -> String
170−showSubscriberType = \case
171− SubscriberPush _ _ -> "SubscriberPush"
172− SubscriberMerge _ _ -> "SubscriberMerge"
173− SubscriberFan _ -> "SubscriberFan"
174− SubscriberMergeChange _ -> "SubscriberMergeChange"
175− SubscriberHold _ -> "SubscriberHold"
176− SubscriberHoldIdentity _ -> "SubscriberHoldIdentity"
177− SubscriberSwitch _ -> "SubscriberSwitch"
178− SubscriberCoincidenceOuter _ -> "SubscriberCoincidenceOuter"
179− SubscriberCoincidenceInner _ -> "SubscriberCoincidenceInner"
180− SubscriberHandle -> "SubscriberHandle"
181−
182−showEventType :: Event x a -> String
183−showEventType = \case
184− EventRoot _ _ -> "EventRoot"
185− EventNever -> "EventNever"
186− EventPush _ -> "EventPush"
187− EventMerge _ -> "EventMerge"
188− EventFan _ _ -> "EventFan"
189− EventSwitch _ -> "EventSwitch"
190− EventCoincidence _ -> "EventCoincidence"
191− EventHold _ -> "EventHold"
192− EventDyn _ -> "EventDyn"
193− EventHoldIdentity _ -> "EventHoldIdentity"
194− EventDynIdentity _ -> "EventDynIdentity"
188+showNodeId = showNodeId' . getNodeId
189+
190+showNodeId' :: Int -> String
191+showNodeId' = ("#"<>) . show
192+
195193
196194#else
197195
198196debugPropagate = False
199−
200197debugInvalidateHeight = False
201−
202198debugInvalidate = False
203199
204200-- This must be inline, or error messages will cause memory leaks due to retaining the node in question
@@ -206,6 +202,10 @@ debugInvalidate = False
206202showNodeId :: a -> String
207203showNodeId _ = ""
208204
205+{-# INLINE showNodeId' #-}
206+showNodeId' :: Int -> String
207+showNodeId' _ = ""
208+
209209#endif
210210
211211#ifdef DEBUG_NODEIDS
@@ -251,9 +251,9 @@ subscribeAndRead = unEvent
251251-- caching; if the computation function is very cheap, this is (much) more
252252-- efficient than 'push'
253253{-# INLINE [1] pushCheap #-}
254−pushCheap :: (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
254+pushCheap :: HasSpiderTimeline x => (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
255255pushCheap !f e = Event $ \sub -> do
256− (subscription, occ) <- subscribeAndRead e $ sub
256+ (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "push" $ sub
257257 { subscriberPropagate = \a -> do
258258 mb <- f a
259259 mapM_ (subscriberPropagate sub) mb
@@ -272,10 +272,10 @@ terminalSubscriber p = Subscriber
272272
273273-- | Subscribe to an Event only for the duration of one occurrence
274274{-# INLINE subscribeAndReadHead #-}
275−subscribeAndReadHead :: Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
275+subscribeAndReadHead :: HasSpiderTimeline x => Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
276276subscribeAndReadHead e sub = do
277277 subscriptionRef <- liftIO $ newIORef $ error "subscribeAndReadHead: not initialized"
278− (subscription, occ) <- subscribeAndRead e $ sub
278+ (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "head" $ sub
279279 { subscriberPropagate = \a -> do
280280 liftIO $ unsubscribe =<< readIORef subscriptionRef
281281 subscriberPropagate sub a
@@ -286,24 +286,42 @@ subscribeAndReadHead e sub = do
286286 return (subscription, occ)
287287
288288--TODO: Make this lazy in its input event
289−headE :: (MonadIO m, Defer (SomeMergeInit x) m) => Event x a -> m (Event x a)
289+headE :: (MonadIO m, Defer (SomeMergeInit x) m, HasSpiderTimeline x) => Event x a -> m (Event x a)
290290headE originalE = do
291291 parent <- liftIO $ newIORef $ Just originalE
292292 defer $ SomeMergeInit $ do --TODO: Rename SomeMergeInit appropriately
293293 let clearParent = liftIO $ writeIORef parent Nothing
294− (_, occ) <- subscribeAndReadHead originalE $ terminalSubscriber $ \_ -> clearParent
294+ (_, occ) <- subscribeAndReadHead originalE $ terminalSubscriber $ const clearParent
295295 when (isJust occ) clearParent
296− return $ Event $ \sub -> do
296+ return $ Event $ \sub ->
297297 liftIO (readIORef parent) >>= \case
298− Nothing -> return (EventSubscription (return ()) $ EventSubscribed zeroRef $ toAny (), Nothing)
298+ Nothing -> subscribeAndReadNever
299299 Just e -> subscribeAndReadHead e sub
300300
301301data CacheSubscribed x a
302302 = CacheSubscribed { _cacheSubscribed_subscribers :: {-# UNPACK #-} !(FastWeakBag (Subscriber x a))
303303 , _cacheSubscribed_parent :: {-# UNPACK #-} !(EventSubscription x)
304304 , _cacheSubscribed_occurrence :: {-# UNPACK #-} !(IORef (Maybe a))
305+#ifdef DEBUG_NODEIDS
306+ , _cacheSubscribed_nodeId :: {-# UNPACK #-} !Int
307+#endif
305308 }
306309
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+
307325-- | Construct an 'Event' whose value is guaranteed not to be recomputed
308326-- repeatedly
309327--
@@ -328,18 +346,23 @@ cacheEvent e =
328346 subscribedTicket <- liftIO (readIORef mSubscribedRef >>= getFastWeakTicket) >>= \case
329347 Just subscribedTicket -> return subscribedTicket
330348 Nothing -> do
349+#ifdef DEBUG_NODEIDS
350+ nodeId <- liftIO newNodeId
351+#endif
331352 subscribers <- liftIO FastWeakBag.empty
332353 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
333357 (parentSub, occ) <- subscribeAndRead e $ Subscriber
334− { subscriberPropagate = \a -> do
335− liftIO $ writeIORef occRef $ Just a
336− scheduleClear occRef
337− propagateFast a subscribers
338− , subscriberInvalidateHeight = \old -> do
339− FastWeakBag.traverse_ subscribers $ invalidateSubscriberHeight old
340− , subscriberRecalculateHeight = \new -> do
341− FastWeakBag.traverse_ subscribers $ recalculateSubscriberHeight new
342− }
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+ }
343366 when (isJust occ) $ do
344367 liftIO $ writeIORef occRef occ -- Set the initial value of occRef; we don't need to do this if occ is Nothing
345368 scheduleClear occRef
@@ -347,29 +370,45 @@ cacheEvent e =
347370 { _cacheSubscribed_subscribers = subscribers
348371 , _cacheSubscribed_parent = parentSub
349372 , _cacheSubscribed_occurrence = occRef
373+#ifdef DEBUG_NODEIDS
374+ , _cacheSubscribed_nodeId = nodeId
375+#endif
350376 }
351377 subscribedTicket <- liftIO $ mkFastWeakTicket subscribed
352378 liftIO $ writeIORef mSubscribedRef =<< getFastWeakTicketWeak subscribedTicket
353379 return subscribedTicket
354− liftIO $ do
355− subscribed <- getFastWeakTicketValue subscribedTicket
356− ticket <- FastWeakBag.insert sub $ _cacheSubscribed_subscribers subscribed
357− occ <- readIORef $ _cacheSubscribed_occurrence subscribed
358− let es = EventSubscription
359− { _eventSubscription_unsubscribe = do
360− FastWeakBag.remove ticket
361− isEmpty <- FastWeakBag.isEmpty $ _cacheSubscribed_subscribers subscribed
362− when isEmpty $ do
363− writeIORef mSubscribedRef emptyFastWeak
364− unsubscribe $ _cacheSubscribed_parent subscribed
365− touch ticket
366− touch subscribedTicket
367− , _eventSubscription_subscribed = EventSubscribed
368− { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ _cacheSubscribed_parent subscribed
369− , eventSubscribedRetained = toAny subscribedTicket
370− }
371− }
372− return (es, occ)
380+ liftIO $ cacheSubscription sub mSubscribedRef subscribedTicket
381+
382+cacheSubscription :: Subscriber x a -> IORef (FastWeak (CacheSubscribed x a))
383+ -> FastWeakTicket (CacheSubscribed x a) -> IO (EventSubscription x, Maybe a)
384+cacheSubscription sub mSubscribedRef subscribedTicket = do
385+ subscribed <- getFastWeakTicketValue subscribedTicket
386+ ticket <- FastWeakBag.insert sub $ _cacheSubscribed_subscribers subscribed
387+ occ <- readIORef $ _cacheSubscribed_occurrence subscribed
388+
389+ let parentSub = _cacheSubscribed_parent subscribed
390+ es = EventSubscription
391+ { _eventSubscription_unsubscribe = do
392+ FastWeakBag.remove ticket
393+
394+ isEmpty <- FastWeakBag.isEmpty $ _cacheSubscribed_subscribers subscribed
395+ when isEmpty $ do
396+ writeIORef mSubscribedRef emptyFastWeak
397+ unsubscribe parentSub
398+ touch ticket
399+ touch subscribedTicket
400+ , _eventSubscription_subscribed = EventSubscribed
401+ { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed parentSub
402+ , eventSubscribedRetained = toAny subscribedTicket
403+#ifdef DEBUG_CYCLES
404+ , eventSubscribedGetParents = return [_eventSubscription_subscribed parentSub]
405+ , eventSubscribedHasOwnHeightRef = False
406+ , eventSubscribedWhoCreated = whoCreatedIORef mSubscribedRef
407+#endif
408+ }
409+ }
410+ return (es, occ)
411+
373412
374413subscribe :: Event x a -> Subscriber x a -> EventM x (EventSubscription x)
375414subscribe e s = fst <$> subscribeAndRead e s
@@ -381,11 +420,14 @@ wrap tag getSpecificSubscribed sub = do
381420 let es = tag subd
382421 return (EventSubscription (WeakBag.remove sln >> touch sln) es, occ)
383422
384−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
385424eventRoot !k !r = Event $ wrap eventSubscribedRoot $ liftIO . getRootSubscribed k r
386425
426+subscribeAndReadNever :: EventM x (EventSubscription x, Maybe a)
427+subscribeAndReadNever = return (EventSubscription (return ()) eventSubscribedNever, Nothing)
428+
387429eventNever :: Event x a
388−eventNever = Event $ \_ -> return (EventSubscription (return ()) eventSubscribedNever, Nothing)
430+eventNever = Event $ const subscribeAndReadNever
389431
390432eventFan :: (GCompare k, HasSpiderTimeline x) => k a -> Fan x k v -> Event x (v a)
391433eventFan !k !f = Event $ wrap eventSubscribedFan $ getFanSubscribed k f
@@ -422,16 +464,6 @@ data Subscriber x a = Subscriber
422464 , subscriberRecalculateHeight :: !(Height -> IO ())
423465 }
424466
425−--TODO: Move this comment to WeakBag
426−-- These function are constructor functions that are marked NOINLINE so they are
427−-- opaque to GHC. If we do not do this, then GHC will sometimes fuse the constructor away
428−-- so any weak references that are attached to the constructors will have their
429−-- finalizer run. Using the opaque constructor, does not see the
430−-- constructor application, so it behaves like an IORef and cannot be fused away.
431−--
432−-- The result is also evaluated to WHNF, since forcing a thunk invalidates
433−-- the weak pointer to it in some cases.
434−
435467newSubscriberHold :: (HasSpiderTimeline x, Patch p) => Hold x p -> IO (Subscriber x p)
436468newSubscriberHold h = return $ Subscriber
437469 { subscriberPropagate = {-# SCC "traverseHold" #-} propagateSubscriberHold h
@@ -440,10 +472,10 @@ newSubscriberHold h = return $ Subscriber
440472 }
441473
442474newSubscriberFan :: forall x k v. (HasSpiderTimeline x, GCompare k) => FanSubscribed x k v -> IO (Subscriber x (DMap k v))
443−newSubscriberFan subscribed = return $ Subscriber
475+newSubscriberFan subscribed = debugSubscriber ("SubscriberFan " <> showNodeId subscribed) $ Subscriber
444476 { subscriberPropagate = \a -> {-# SCC "traverseFan" #-} do
445477 subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
446− 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"
447479 liftIO $ writeIORef (fanSubscribedOccurrence subscribed) $ Just a
448480 scheduleClear $ fanSubscribedOccurrence subscribed
449481 let f _ (Pair v subsubs) = do
@@ -452,50 +484,40 @@ newSubscriberFan subscribed = return $ Subscriber
452484 _ <- DMap.traverseWithKey f $ DMap.intersectionWithKey (\_ -> Pair) a subs --TODO: Would be nice to have DMap.traverse_
453485 return ()
454486 , subscriberInvalidateHeight = \old -> do
455− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
456487 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
457488 forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
458− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
459489 , subscriberRecalculateHeight = \new -> do
460− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
461490 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
462491 forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
463− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
464492 }
465493
466494newSubscriberSwitch :: forall x a. HasSpiderTimeline x => SwitchSubscribed x a -> IO (Subscriber x a)
467−newSubscriberSwitch subscribed = return $ Subscriber
495+newSubscriberSwitch subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
468496 { subscriberPropagate = \a -> {-# SCC "traverseSwitch" #-} do
469− tracePropagate (Proxy :: Proxy x) $ "SubscriberSwitch" <> showNodeId subscribed
470497 liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
471498 scheduleClear $ switchSubscribedOccurrence subscribed
472499 propagate a $ switchSubscribedSubscribers subscribed
473500 , subscriberInvalidateHeight = \_ -> do
474− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
475501 oldHeight <- readIORef $ switchSubscribedHeight subscribed
476502 when (oldHeight /= invalidHeight) $ do
477503 writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
478504 WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
479− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
480− , subscriberRecalculateHeight = \new -> do
481− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
482− updateSwitchHeight new subscribed
483− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
484− }
505+ , subscriberRecalculateHeight = (`updateSwitchHeight` subscribed)
506+ }
485507
486508newSubscriberCoincidenceOuter :: forall x b. HasSpiderTimeline x => CoincidenceSubscribed x b -> IO (Subscriber x (Event x b))
487−newSubscriberCoincidenceOuter subscribed = return $ Subscriber
509+newSubscriberCoincidenceOuter subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
488510 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceOuter" #-} do
489− tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
490511 outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
491512 tracePropagate (Proxy :: Proxy x) $ " outerHeight = " <> show outerHeight
492513 (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
493514 tracePropagate (Proxy :: Proxy x) $ " isJust occ = " <> show (isJust occ)
494515 tracePropagate (Proxy :: Proxy x) $ " innerHeight = " <> show innerHeight
516+
495517 liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
496518 scheduleClear $ coincidenceSubscribedInnerParent subscribed
497519 case occ of
498− Nothing -> do
520+ Nothing ->
499521 when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
500522 writeIORef (coincidenceSubscribedHeight subscribed) $! innerHeight
501523 WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
@@ -504,20 +526,13 @@ newSubscriberCoincidenceOuter subscribed = return $ Subscriber
504526 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
505527 scheduleClear $ coincidenceSubscribedOccurrence subscribed
506528 propagate o $ coincidenceSubscribedSubscribers subscribed
507− , subscriberInvalidateHeight = \_ -> do
508− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
509− invalidateCoincidenceHeight subscribed
510− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
511− , subscriberRecalculateHeight = \_ -> do
512− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
513− recalculateCoincidenceHeight subscribed
514− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
529+ , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
530+ , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
515531 }
516532
517533newSubscriberCoincidenceInner :: forall x a. HasSpiderTimeline x => CoincidenceSubscribed x a -> IO (Subscriber x a)
518−newSubscriberCoincidenceInner subscribed = return $ Subscriber
534+newSubscriberCoincidenceInner subscribed = debugSubscriber ("SubscriberCoincidenceInner" <> showNodeId subscribed) $ Subscriber
519535 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceInner" #-} do
520− tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceInner" <> showNodeId subscribed
521536 occ <- liftIO $ readIORef $ coincidenceSubscribedOccurrence subscribed
522537 case occ of
523538 Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
@@ -525,14 +540,8 @@ newSubscriberCoincidenceInner subscribed = return $ Subscriber
525540 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
526541 scheduleClear $ coincidenceSubscribedOccurrence subscribed
527542 propagate a $ coincidenceSubscribedSubscribers subscribed
528− , subscriberInvalidateHeight = \_ -> do
529− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
530− invalidateCoincidenceHeight subscribed
531− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
532− , subscriberRecalculateHeight = \_ -> do
533− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
534− recalculateCoincidenceHeight subscribed
535− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
543+ , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
544+ , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
536545 }
537546
538547invalidateSubscriberHeight :: Height -> Subscriber x a -> IO ()
@@ -542,15 +551,15 @@ recalculateSubscriberHeight :: Height -> Subscriber x a -> IO ()
542551recalculateSubscriberHeight = flip subscriberRecalculateHeight
543552
544553-- | Propagate everything at the current height
545−propagate :: a -> WeakBag (Subscriber x a) -> EventM x ()
546−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) $
547556 -- 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
548557 --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
549558 WeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
550559
551560-- | Propagate everything at the current height
552−propagateFast :: a -> FastWeakBag (Subscriber x a) -> EventM x ()
553−propagateFast a subscribers = withIncreasedDepth $ do
561+propagateFast :: forall x a. HasSpiderTimeline x => a -> FastWeakBag (Subscriber x a) -> EventM x ()
562+propagateFast a subscribers = withIncreasedDepth (Proxy::Proxy x) $
554563 -- 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
555564 --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
556565 FastWeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
@@ -571,7 +580,7 @@ data EventSubscribed x = EventSubscribed
571580 { eventSubscribedHeightRef :: {-# UNPACK #-} !(IORef Height)
572581 , eventSubscribedRetained :: {-# NOUNPACK #-} !Any
573582#ifdef DEBUG_CYCLES
574− , eventSubscribedGetParents :: !(IO [Some (EventSubscribed x)]) -- For debugging loops
583+ , eventSubscribedGetParents :: !(IO [EventSubscribed x]) -- For debugging loops
575584 , eventSubscribedHasOwnHeightRef :: !Bool
576585 , eventSubscribedWhoCreated :: !(IO [String])
577586#endif
@@ -598,13 +607,23 @@ eventSubscribedNever = EventSubscribed
598607 , eventSubscribedWhoCreated = return ["never"]
599608#endif
600609 }
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+ }
601620
602621eventSubscribedFan :: FanSubscribed x k v -> EventSubscribed x
603622eventSubscribedFan !subscribed = EventSubscribed
604623 { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
605624 , eventSubscribedRetained = toAny subscribed
606625#ifdef DEBUG_CYCLES
607− , eventSubscribedGetParents = return [Some $ _eventSubscription_subscribed $ fanSubscribedParent subscribed]
626+ , eventSubscribedGetParents = return [_eventSubscription_subscribed $ fanSubscribedParent subscribed]
608627 , eventSubscribedHasOwnHeightRef = False
609628 , eventSubscribedWhoCreated = whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
610629#endif
@@ -617,7 +636,7 @@ eventSubscribedSwitch !subscribed = EventSubscribed
617636#ifdef DEBUG_CYCLES
618637 , eventSubscribedGetParents = do
619638 s <- readIORef $ switchSubscribedCurrentParent subscribed
620− return [Some $ _eventSubscription_subscribed s]
639+ return [_eventSubscription_subscribed s]
621640 , eventSubscribedHasOwnHeightRef = True
622641 , eventSubscribedWhoCreated = whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
623642#endif
@@ -630,8 +649,8 @@ eventSubscribedCoincidence !subscribed = EventSubscribed
630649#ifdef DEBUG_CYCLES
631650 , eventSubscribedGetParents = do
632651 innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
633− let outerParent = Some $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
634− innerParents = maybeToList $ fmap Some innerSubscription
652+ let outerParent = _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
653+ innerParents = maybeToList $ innerSubscription
635654 return $ outerParent : innerParents
636655 , eventSubscribedHasOwnHeightRef = True
637656 , eventSubscribedWhoCreated = whoCreatedIORef $ coincidenceSubscribedCachedSubscribed subscribed
@@ -645,15 +664,15 @@ getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
645664whoCreatedEventSubscribed :: EventSubscribed x -> IO [String]
646665whoCreatedEventSubscribed = eventSubscribedWhoCreated
647666
648−walkInvalidHeightParents :: EventSubscribed x -> IO [Some (EventSubscribed x)]
667+walkInvalidHeightParents :: EventSubscribed x -> IO [EventSubscribed x]
649668walkInvalidHeightParents s0 = do
650− subscribers <- flip execStateT mempty $ ($ Some s0) $ fix $ \loop (Some s) -> do
669+ subscribers <- flip execStateT mempty $ ($ s0) $ fix $ \loop s -> do
651670 h <- liftIO $ readIORef $ eventSubscribedHeightRef s
652671 when (h == invalidHeight) $ do
653672 when (eventSubscribedHasOwnHeightRef s) $ liftIO $ writeIORef (eventSubscribedHeightRef s) $! invalidHeightBeingTraversed
654− modify (Some s :)
673+ modify (s :)
655674 mapM_ loop =<< liftIO (eventSubscribedGetParents s)
656− forM_ subscribers $ \(Some s) -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
675+ forM_ subscribers $ \s -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
657676 return subscribers
658677#endif
659678
@@ -1038,7 +1057,7 @@ data SomeMergeUpdate x = SomeMergeUpdate
10381057newtype SomeMergeInit x = SomeMergeInit { unSomeMergeInit :: EventM x () }
10391058
10401059-- EventM can do everything BehaviorM can, plus create holds
1041−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
1060+newtype EventM x a = EventM { unEventM :: IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException)
10421061
10431062newtype MergeSubscribedParent x a = MergeSubscribedParent { unMergeSubscribedParent :: EventSubscription x }
10441063
@@ -1063,7 +1082,8 @@ heightBagFromList :: [Height] -> HeightBag
10631082heightBagFromList heights = heightBagVerify $ foldl' (flip heightBagAdd) heightBagEmpty heights
10641083
10651084heightBagAdd :: Height -> HeightBag -> HeightBag
1066−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
10671087
10681088heightBagRemove :: Height -> HeightBag -> HeightBag
10691089heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.lookup h c of
@@ -1072,6 +1092,13 @@ heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.loo
10721092 0 -> IntMap.delete h c
10731093 _ -> IntMap.insert h (pred old) c
10741094
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+
10751102heightBagMax :: HeightBag -> Height
10761103heightBagMax (HeightBag _ c) = case IntMap.maxViewWithKey c of
10771104 Just ((h, _), _) -> Height h
@@ -1319,55 +1346,110 @@ mkWeakPtrWithDebug x debugNote = do
13191346 x' <- evaluate x
13201347 mkWeakPtr x' $
13211348 if debugFinalize
1322− then Just $ putStrLn $ "finalizing: " ++ debugNote
1349+ then Just $ debugStrLn $ "finalizing: " ++ debugNote
13231350 else Nothing
13241351
13251352type WeakList a = [Weak a]
13261353
1327−{-# INLINE withIncreasedDepth #-}
1354+type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
1355+
1356+
1357+
1358+
13281359#ifdef DEBUG
1329−withIncreasedDepth :: CanTrace x m => m a -> m a
1330−withIncreasedDepth a = do
1331− spiderTimeline <- askSpiderTimelineEnv
1332− liftIO $ modifyIORef' (_spiderTimeline_depth (unSTE 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
13331385 result <- a
1334− liftIO $ modifyIORef' (_spiderTimeline_depth (unSTE spiderTimeline)) pred
1386+ liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) pred
13351387 return result
1336−#else
1337−withIncreasedDepth :: m a -> m a
1338−withIncreasedDepth = id
1339−#endif
1340−
1341−type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
13421388
13431389{-# INLINE tracePropagate #-}
13441390tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1345−tracePropagate p = traceWhen p debugPropagate
1391+tracePropagate p = when debugPropagate . trace p
13461392
13471393{-# INLINE traceInvalidate #-}
13481394traceInvalidate :: String -> IO ()
1349−traceInvalidate = when debugInvalidate . liftIO . putStrLn
1395+traceInvalidate = when debugInvalidate . liftIO . debugStrLn
13501396
1351−{-# INLINE traceWhen #-}
1352−traceWhen :: (CanTrace x m) => proxy x -> Bool -> String -> m ()
1353−traceWhen p b message = traceMWhen p b $ return message
1397+{-# INLINE traceInvalidateHeight #-}
1398+traceInvalidateHeight :: String -> IO ()
1399+traceInvalidateHeight = when debugInvalidateHeight . liftIO . debugStrLn
13541400
1355−{-# INLINE traceMWhen #-}
1356−traceMWhen :: (CanTrace x m) => proxy x -> Bool -> m String -> m ()
1357−traceMWhen _ b getMessage = when b $ do
1401+{-# INLINE trace #-}
1402+trace :: (CanTrace x m) => proxy x -> String -> m ()
1403+trace p message = traceM p $ return message
1404+
1405+{-# INLINE traceM #-}
1406+traceM :: forall x proxy m. (CanTrace x m) => proxy x -> m String -> m ()
1407+traceM _ getMessage = do
13581408 message <- getMessage
1359−#ifdef DEBUG
1360− spiderTimeline <- askSpiderTimelineEnv
1361− d <- liftIO $ readIORef $ _spiderTimeline_depth $ unSTE spiderTimeline
1409+ d <- liftIO $ readIORef $ _spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)
1410+ liftIO $ debugStrLn $ replicate d ' ' <> message
1411+
13621412#else
1363− 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+
13641448#endif
1365− liftIO $ putStrLn $ replicate d ' ' <> message
13661449
13671450whoCreatedIORef :: IORef a -> IO [String]
13681451whoCreatedIORef (IORef a) = whoCreated $! a
13691452
1370−#ifdef DEBUG_CYCLES
13711453groupByHead :: Eq a => [NonEmpty a] -> [(a, NonEmpty [a])]
13721454groupByHead = \case
13731455 [] -> []
@@ -1378,20 +1460,54 @@ groupByHead = \case
13781460 | otherwise -> (x, xs :| []) : l
13791461
13801462listsToForest :: Eq a => [[a]] -> Forest a
1381−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
13821474#endif
13831475
1476+#ifdef DEBUG_CYCLES
1477+
1478+data EventLoopException = EventLoopException [[String]]
1479+instance Exception EventLoopException
1480+
1481+instance Show EventLoopException where
1482+ show (EventLoopException stacks) = "causality loop detected:\n" <> if null stacks
1483+ then "no location information, compile with profiling enabled for stack tree"
1484+ else showStacks stacks
1485+
1486+#else
1487+
1488+data EventLoopException = EventLoopException
1489+instance Exception EventLoopException
1490+
1491+instance Show EventLoopException where
1492+ show EventLoopException = "causality loop detected: \n" <>
1493+ "compile reflex with flag 'debug-cycles' and compile with profiling enabled for stack tree"
1494+
1495+#endif
1496+
1497+
13841498{-# INLINE propagateSubscriberHold #-}
13851499propagateSubscriberHold :: forall x p. (HasSpiderTimeline x, Patch p) => Hold x p -> p -> EventM x ()
13861500propagateSubscriberHold h a = do
1387− {-# SCC "trace" #-} traceMWhen (Proxy :: Proxy x) debugPropagate $ liftIO $ do
1501+ {-# SCC "trace" #-} when debugPropagate $ traceM (Proxy :: Proxy x) $ liftIO $ do
13881502 invalidators <- liftIO $ readIORef $ holdInvalidators h
13891503 return $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
1504+
13901505 v <- {-# SCC "read" #-} liftIO $ readIORef $ holdValue h
13911506 case {-# SCC "apply" #-} apply a v of
13921507 Nothing -> return ()
13931508 Just v' -> do
1394− {-# 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)
13951511 vRef <- {-# SCC "vRef" #-} liftIO $ evaluate $ holdValue h
13961512 iRef <- {-# SCC "iRef" #-} liftIO $ evaluate $ holdInvalidators h
13971513 defer $ {-# SCC "assignment" #-} SomeAssignment vRef iRef v'
@@ -1445,7 +1561,7 @@ getDynHold d = do
14451561zeroRef :: IORef Height
14461562zeroRef = unsafePerformIO $ newIORef zeroHeight
14471563
1448−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)
14491565getRootSubscribed k r sub = do
14501566 mSubscribed <- readIORef $ rootSubscribed r
14511567 let getOcc = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
@@ -1459,7 +1575,9 @@ getRootSubscribed k r sub = do
14591575 let !cached = rootSubscribed r
14601576 uninitRef <- newIORef $ error "getRootsubscribed: uninitRef not initialized"
14611577 (subs, sln) <- WeakBag.singleton sub weakSelf cleanupRootSubscribed
1462− when debugPropagate $ putStrLn $ "getRootSubscribed: calling rootInit"
1578+
1579+ tracePropagate (Proxy::Proxy x) $ "getRootSubscribed: calling rootInit"
1580+
14631581 uninit <- rootInit r k $ RootTrigger (subs, rootOccurrence r, k)
14641582 writeIORef uninitRef $! uninit
14651583#ifdef DEBUG_NODEIDS
@@ -1509,6 +1627,9 @@ data FanInt x a = FanInt
15091627 { _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
15101628 , _fanInt_subscriptionRef :: {-# UNPACK #-} !(IORef (EventSubscription x)) -- This should have a valid subscription iff subscribers is non-empty
15111629 , _fanInt_occRef :: {-# UNPACK #-} !(IORef (IntMap a))
1630+#ifdef DEBUG_NODEIDS
1631+ , _fanInt_nodeId :: {-# UNPACK #-} !Int
1632+#endif
15121633 }
15131634
15141635newFanInt :: IO (FanInt x a)
@@ -1516,10 +1637,16 @@ newFanInt = do
15161637 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
15171638 subscriptionRef <- newIORef $ error "fanInt: no subscription"
15181639 occRef <- newIORef $ error "fanInt: no occurrence"
1640+#ifdef DEBUG_NODEIDS
1641+ nodeId <- newNodeId
1642+#endif
15191643 return $ FanInt
15201644 { _fanInt_subscribers = subscribers
15211645 , _fanInt_subscriptionRef = subscriptionRef
15221646 , _fanInt_occRef = occRef
1647+#ifdef DEBUG_NODEIDS
1648+ , _fanInt_nodeId = nodeId
1649+#endif
15231650 }
15241651
15251652fanInt :: HasSpiderTimeline x => Event x (IntMap a) -> EventSelectorInt x a
@@ -1528,20 +1655,21 @@ fanInt p = unsafePerformIO $ do
15281655 pure $ EventSelectorInt $ \k -> Event $ \sub -> do
15291656 isEmpty <- liftIO $ FastMutableIntMap.isEmpty (_fanInt_subscribers self)
15301657 when isEmpty $ do -- This is the first subscriber, so we need to subscribe to our input
1531− (subscription, parentOcc) <- subscribeAndRead p $ Subscriber
1658+ let desc = "fanInt" <> showNodeId self <> ", k = " <> show k
1659+ (subscription, parentOcc) <- subscribeAndRead p $ debugSubscriber' desc $ Subscriber
15321660 { subscriberPropagate = \m -> do
15331661 liftIO $ writeIORef (_fanInt_occRef self) m
15341662 scheduleIntClear $ _fanInt_occRef self
1535− FastMutableIntMap.forIntersectionWithImmutable_ (_fanInt_subscribers self) m $ \b v -> do --TODO: Do we need to know that no subscribers are being added as we traverse?
1536− FastWeakBag.traverse_ b $ \s -> do
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 ->
15371665 subscriberPropagate s v
1538− , subscriberInvalidateHeight = \old -> do
1539− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b -> do
1540− FastWeakBag.traverse_ b $ \s -> do
1666+ , subscriberInvalidateHeight = \old ->
1667+ FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1668+ FastWeakBag.traverse_ b $ \s ->
15411669 subscriberInvalidateHeight s old
1542− , subscriberRecalculateHeight = \new -> do
1543− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b -> do
1544− FastWeakBag.traverse_ b $ \s -> do
1670+ , subscriberRecalculateHeight = \new ->
1671+ FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1672+ FastWeakBag.traverse_ b $ \s ->
15451673 subscriberRecalculateHeight s new
15461674 }
15471675 liftIO $ do
@@ -1555,10 +1683,25 @@ fanInt p = unsafePerformIO $ do
15551683 FastMutableIntMap.insert (_fanInt_subscribers self) k b
15561684 return b
15571685 Just b -> return b
1558− t <- liftIO $ FastWeakBag.insert sub b
1686+ ticket <- liftIO $ FastWeakBag.insert sub b
15591687 currentOcc <- readIORef (_fanInt_occRef self)
1560− (EventSubscription _ (EventSubscribed !heightRef _)) <- readIORef (_fanInt_subscriptionRef self)
1561− return (EventSubscription (FastWeakBag.remove t) $! EventSubscribed heightRef $! toAny (_fanInt_subscriptionRef self, t), IntMap.lookup k currentOcc)
1688+
1689+ subscribed <- fanIntSubscribed ticket self
1690+ return (EventSubscription (FastWeakBag.remove ticket) subscribed, IntMap.lookup k currentOcc)
1691+
1692+fanIntSubscribed :: FastWeakBagTicket k -> FanInt x a -> IO (EventSubscribed x)
1693+fanIntSubscribed ticket self = do
1694+ subscribedParent <- _eventSubscription_subscribed <$> 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+
15621705
15631706{-# INLINABLE getFanSubscribed #-}
15641707getFanSubscribed :: (HasSpiderTimeline x, GCompare k) => k a -> Fan x k v -> Subscriber x (v a) -> EventM x (WeakBagTicket, FanSubscribed x k v, Maybe (v a))
@@ -1756,7 +1899,7 @@ mergeCheap
17561899 => (forall a. q a -> Event x (v a))
17571900 -> DynamicS x (PatchDMap k q)
17581901 -> Event x (DMap k v)
1759−mergeCheap nt = mergeGCheap' getInitialSubscribers updateMe destroy
1902+mergeCheap nt = mergeGCheap' unMergeSubscribedParent getInitialSubscribers updateMe destroy
17601903 where
17611904 updateMe :: MergeUpdateFunc k v x (PatchDMap k q) (MergeSubscribedParent x)
17621905 updateMe subscriber heightBagRef oldParents (PatchDMap p) = do
@@ -1771,7 +1914,9 @@ mergeCheap nt = mergeGCheap' getInitialSubscribers updateMe destroy
17711914 liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
17721915 return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
17731916 forM_ mOldSubd $ \oldSubd -> do
1774− oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1917+ oldHeight <- liftIO $ getEventSubscribedHeight $
1918+ _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1919+
17751920 liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
17761921 return (maybeToList (unMergeSubscribedParent <$> mOldSubd) ++ subscriptionsToKill, newPs)
17771922 foldM f ([], oldParents) $ DMap.toList p
@@ -1796,7 +1941,7 @@ mergeCheapWithMove :: forall k x v q. (HasSpiderTimeline x, GCompare k)
17961941 => (forall a. q a -> Event x (v a))
17971942 -> DynamicS x (PatchDMapWithMove k q)
17981943 -> Event x (DMap k v)
1799−mergeCheapWithMove nt = mergeGCheap' getInitialSubscribers updateMe destroy
1944+mergeCheapWithMove nt = mergeGCheap' _mergeSubscribedParentWithMove_subscription getInitialSubscribers updateMe destroy
18001945 where
18011946 updateMe :: MergeUpdateFunc k v x (PatchDMapWithMove k q) (MergeSubscribedParentWithMove x k)
18021947 updateMe subscriber heightBagRef oldParents p = do
@@ -1815,13 +1960,17 @@ mergeCheapWithMove nt = mergeGCheap' getInitialSubscribers updateMe destroy
18151960 let moveOrDelete :: forall a. k a -> PatchDMapWithMove.NodeInfo k q a -> MergeSubscribedParentWithMove x k a -> Constant (EventM x (Maybe (EventSubscription x))) a
18161961 moveOrDelete _ ni parent = Constant $ case getComposeMaybe $ PatchDMapWithMove._nodeInfo_to ni of
18171962 Nothing -> do
1818− oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $ _mergeSubscribedParentWithMove_subscription parent
1963+ oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $
1964+ _mergeSubscribedParentWithMove_subscription parent
1965+
18191966 liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
18201967 return $ Just $ _mergeSubscribedParentWithMove_subscription parent
18211968 Just toKey -> do
18221969 liftIO $ writeIORef (_mergeSubscribedParentWithMove_key parent) $! toKey
18231970 return Nothing
1824− toDelete <- fmap catMaybes $ mapM (\(_ :=> v) -> getConstant v) $ DMap.toList $ DMap.intersectionWithKey moveOrDelete (unPatchDMapWithMove p) oldParents
1971+ toDelete <- fmap catMaybes $ mapM (\(_ :=> v) -> getConstant v) $ DMap.toList $
1972+ DMap.intersectionWithKey moveOrDelete (unPatchDMapWithMove p) oldParents
1973+
18251974 return (toDelete, applyAlways p' oldParents)
18261975 getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParentWithMove x k)
18271976 getInitialSubscribers initialParents subscriber = do
@@ -1846,6 +1995,8 @@ type MergeUpdateFunc k v x p s
18461995 -> p
18471996 -> EventM x ([EventSubscription x], DMap k s)
18481997
1998+type MergeGetSubscription x s = forall a. s a -> EventSubscription x
1999+
18492000type MergeInitFunc k v q x s
18502001 = DMap k q
18512002 -> (forall a. EventM x (k a) -> Subscriber x (v a))
@@ -1869,14 +2020,17 @@ invalidateMergeHeight m = invalidateMergeHeight' (_merge_heightRef m) (_merge_su
18692020invalidateMergeHeight' :: IORef Height -> Subscriber x a -> IO ()
18702021invalidateMergeHeight' heightRef sub = do
18712022 oldHeight <- readIORef heightRef
1872− 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
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
18732025 writeIORef heightRef $! invalidHeight
18742026 subscriberInvalidateHeight sub oldHeight
18752027
18762028revalidateMergeHeight :: Merge x k v s -> IO ()
18772029revalidateMergeHeight m = do
18782030 currentHeight <- readIORef $ _merge_heightRef m
1879− when (currentHeight == invalidHeight) $ do -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
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
18802034 heights <- readIORef $ _merge_heightBagRef m
18812035 parents <- readIORef $ _merge_parentsRef m
18822036 -- When the number of heights in the bag reaches the number of parents, we should have a valid height
@@ -1884,7 +2038,7 @@ revalidateMergeHeight m = do
18842038 LT -> return ()
18852039 EQ -> do
18862040 let height = succHeight $ heightBagMax heights
1887− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
2041+ traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
18882042 writeIORef (_merge_heightRef m) $! height
18892043 subscriberRecalculateHeight (_merge_sub m) height
18902044 GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show (DMap.size parents) <> ") for Merge"
@@ -1892,36 +2046,45 @@ revalidateMergeHeight m = do
18922046scheduleMergeSelf :: HasSpiderTimeline x => Merge x k v s -> Height -> EventM x ()
18932047scheduleMergeSelf m height = scheduleMerge' height (_merge_heightRef m) $ do
18942048 vals <- liftIO $ readIORef $ _merge_accumRef m
1895− liftIO $ writeIORef (_merge_accumRef m) $! DMap.empty -- Once we're done with this, we can clear it immediately, because if there's a cacheEvent in front of us, it'll handle subsequent subscribers, and if not, we won't get subsequent subscribers
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
18962052 --TODO: Assert that m is not empty
18972053 subscriberPropagate (_merge_sub m) vals
18982054
1899−mergeSubscriber :: forall x k v s a. (HasSpiderTimeline x, GCompare k) => Merge x k v s -> EventM x (k a) -> Subscriber x (v a)
1900−mergeSubscriber m getKey = Subscriber
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
19012078 { subscriberPropagate = \a -> do
19022079 oldM <- liftIO $ readIORef $ _merge_accumRef m
19032080 k <- getKey
1904− let newM = DMap.insertWith (error $ "Same key fired multiple times for Merge") k a oldM
2081+ let newM = DMap.insertWith (error "Same key fired multiple times for Merge") k a oldM
19052082 tracePropagate (Proxy :: Proxy x) $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
19062083 liftIO $ writeIORef (_merge_accumRef m) $! newM
19072084 when (DMap.null oldM) $ do -- Only schedule the firing once
19082085 height <- liftIO $ readIORef $ _merge_heightRef m
1909− --TODO: assertions about height
1910− currentHeight <- getCurrentHeight
1911− when (height <= currentHeight) $ do
1912− if height /= invalidHeight
1913− then do
1914− myStack <- liftIO $ whoCreatedIORef undefined --TODO
1915− error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
1916− else liftIO $ do
1917−#ifdef DEBUG_CYCLES
1918− nodesInvolvedInCycle <- walkInvalidHeightParents $ eventSubscribedMerge subscribed
1919− stacks <- forM nodesInvolvedInCycle $ \(Some es) -> whoCreatedEventSubscribed es
1920− let cycleInfo = ":\n" <> drawForest (listsToForest stacks)
1921−#else
1922− let cycleInfo = ""
1923−#endif
1924− error $ "Causality loop found" <> cycleInfo
2086+ checkCycle subscribed
2087+
19252088 scheduleMergeSelf m height
19262089 , subscriberInvalidateHeight = \old -> do --TODO: When removing a parent doesn't actually change the height, maybe we can avoid invalidating
19272090 modifyIORef' (_merge_heightBagRef m) $ heightBagRemove old
@@ -1932,31 +2095,45 @@ mergeSubscriber m getKey = Subscriber
19322095 }
19332096
19342097--TODO: Be able to run as much of this as possible promptly
1935−updateMerge :: (HasSpiderTimeline x, GCompare k) => Merge x k v s -> MergeUpdateFunc k v x p s -> p -> SomeMergeUpdate x
1936−updateMerge m updateFunc p = SomeMergeUpdate updateMe (invalidateMergeHeight m) (revalidateMergeHeight m)
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)
19372100 where updateMe = do
19382101 oldParents <- liftIO $ readIORef $ _merge_parentsRef m
1939− (subscriptionsToKill, newParents) <- updateFunc (mergeSubscriber m) (_merge_heightBagRef m) oldParents p
2102+ (subscriptionsToKill, newParents) <- updateFunc (mergeSubscriber subscribed m) (_merge_heightBagRef m) oldParents p
19402103 liftIO $ writeIORef (_merge_parentsRef m) $! newParents
19412104 return subscriptionsToKill
19422105
19432106{-# INLINE mergeGCheap' #-}
19442107mergeGCheap' :: forall k v x p s q. (HasSpiderTimeline x, GCompare k, PatchTarget p ~ DMap k q)
1945− => MergeInitFunc k v q x s -> MergeUpdateFunc k v x p s -> MergeDestroyFunc k s -> DynamicS x p -> Event x (DMap k v)
1946−mergeGCheap' getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
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
19472110 initialParents <- readBehaviorUntracked $ dynamicCurrent d
19482111 accumRef <- liftIO $ newIORef $ error "merge: accumRef not yet initialized"
19492112 heightRef <- liftIO $ newIORef $ error "merge: heightRef not yet initialized"
19502113 heightBagRef <- liftIO $ newIORef $ error "merge: heightBagRef not yet initialized"
19512114 parentsRef :: IORef (DMap k s) <- liftIO $ newIORef $ error "merge: parentsRef not yet initialized"
1952− let m = Merge
2115+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2116+
2117+ let subscribed = EventSubscribed
2118+ { eventSubscribedHeightRef = heightRef
2119+ , eventSubscribedRetained = toAny (parentsRef, changeSubdRef)
2120+#ifdef DEBUG_CYCLES
2121+ , eventSubscribedGetParents = do
2122+ let getParent' (_ :=> v) = _eventSubscription_subscribed (getParent v)
2123+ fmap getParent' . DMap.toList <$> readIORef parentsRef
2124+ , eventSubscribedHasOwnHeightRef = False
2125+ , eventSubscribedWhoCreated = whoCreatedIORef heightRef
2126+#endif
2127+ }
2128+
2129+ m = Merge
19532130 { _merge_parentsRef = parentsRef
19542131 , _merge_heightBagRef = heightBagRef
19552132 , _merge_heightRef = heightRef
19562133 , _merge_sub = sub
19572134 , _merge_accumRef = accumRef
19582135 }
1959− (dm, heights, initialParentState) <- getInitialSubscribers initialParents $ mergeSubscriber m
2136+ (dm, heights, initialParentState) <- getInitialSubscribers initialParents $ mergeSubscriber subscribed m
19602137 let myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
19612138 myHeight = if invalidHeight `elem` heights
19622139 then invalidHeight
@@ -1965,31 +2142,29 @@ mergeGCheap' getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
19652142 let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
19662143 then (if DMap.null dm then Nothing else Just dm, DMap.empty)
19672144 else (Nothing, dm)
1968− unless (DMap.null accum) $ do
1969− scheduleMergeSelf m myHeight
2145+ unless (DMap.null accum) $ scheduleMergeSelf m myHeight
19702146 liftIO $ writeIORef accumRef $! accum
19712147 liftIO $ writeIORef heightRef $! myHeight
19722148 liftIO $ writeIORef heightBagRef $! myHeightBag
1973− changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
19742149 liftIO $ writeIORef parentsRef $! initialParentState
19752150 defer $ SomeMergeInit $ do
1976− let s = Subscriber
2151+ let changeSubscriber = Subscriber
19772152 { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
1978− tracePropagate (Proxy :: Proxy x) $ "SubscriberMerge/Change"
1979− defer $ updateMerge m updateFunc a
2153+ tracePropagate (Proxy :: Proxy x) "SubscriberMerge/Change"
2154+ defer $ updateMerge subscribed m updateFunc a
19802155 , subscriberInvalidateHeight = \_ -> return ()
19812156 , subscriberRecalculateHeight = \_ -> return ()
19822157 }
1983− (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) s
1984− forM_ change $ \c -> defer $ updateMerge m updateFunc c
2158+ (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
2159+ forM_ change $ \c -> defer $ updateMerge subscribed m updateFunc c
19852160 -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
19862161 -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
19872162 -- its subscription.
1988− liftIO $ writeIORef changeSubdRef (s, changeSubscription)
2163+ liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
19892164 let unsubscribeAll = destroy =<< readIORef parentsRef
1990− return ( EventSubscription unsubscribeAll $ EventSubscribed heightRef $ toAny (parentsRef, changeSubdRef)
1991− , occ
1992− )
2165+
2166+ return (EventSubscription unsubscribeAll subscribed, occ)
2167+
19932168
19942169mergeInt :: forall x a. (HasSpiderTimeline x) => DynamicS x (PatchIntMap (Event x a)) -> Event x (IntMap a)
19952170mergeInt = cacheEvent . mergeIntCheap
@@ -2002,13 +2177,22 @@ mergeIntCheap d = Event $ \sub -> do
20022177 heightRef <- liftIO $ newIORef zeroHeight
20032178 heightBagRef <- liftIO $ newIORef heightBagEmpty
20042179 parents <- liftIO $ FastMutableIntMap.newEmpty
2180+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2181+ let subscribed = EventSubscribed
2182+ { eventSubscribedHeightRef = heightRef
2183+ , eventSubscribedRetained = toAny (parents, changeSubdRef)
2184+#ifdef DEBUG_CYCLES
2185+ , eventSubscribedGetParents = fmap (_eventSubscription_subscribed . snd) <$> FastMutableIntMap.toList parents
2186+ , eventSubscribedHasOwnHeightRef = False
2187+ , eventSubscribedWhoCreated = whoCreatedIORef heightRef
2188+#endif
2189+ }
20052190 let scheduleSelf = do
20062191 height <- liftIO $ readIORef $ heightRef
20072192 scheduleMerge' height heightRef $ do
20082193 vals <- liftIO $ FastMutableIntMap.getFrozenAndClear accum
20092194 subscriberPropagate sub vals
2010− invalidateMyHeight = do
2011− invalidateMergeHeight' heightRef sub
2195+ invalidateMyHeight = invalidateMergeHeight' heightRef sub
20122196 recalculateMyHeight = do
20132197 currentHeight <- readIORef heightRef
20142198 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?
@@ -2018,12 +2202,14 @@ mergeIntCheap d = Event $ \sub -> do
20182202 LT -> return ()
20192203 EQ -> do
20202204 let height = succHeight $ heightBagMax heights
2021− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
2205+ traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
20222206 writeIORef heightRef $! height
20232207 subscriberRecalculateHeight sub height
20242208 GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show numParents <> ") for Merge"
20252209 mySubscriber k = Subscriber
20262210 { subscriberPropagate = \a -> do
2211+ checkCycle subscribed
2212+
20272213 wasEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
20282214 liftIO $ FastMutableIntMap.insert accum k a
20292215 when wasEmpty scheduleSelf
@@ -2057,7 +2243,6 @@ mergeIntCheap d = Event $ \sub -> do
20572243 else liftIO $ Just <$> FastMutableIntMap.getFrozenAndClear accum
20582244 else do when (not isEmpty) scheduleSelf -- We have things accumulated, but we shouldn't have fired them yet
20592245 return Nothing
2060− changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
20612246 defer $ SomeMergeInit $ do
20622247 let updateMe a = SomeMergeUpdate u invalidateMyHeight recalculateMyHeight
20632248 where
@@ -2071,25 +2256,27 @@ mergeIntCheap d = Event $ \sub -> do
20712256 oldParents <- liftIO $ FastMutableIntMap.applyPatch parents newSubscriptions
20722257 liftIO $ for_ oldParents $ \oldParent -> do
20732258 oldParentHeight <- getEventSubscribedHeight $ _eventSubscription_subscribed oldParent
2259+
2260+ print ("updateMe", oldParentHeight)
20742261 modifyIORef' heightBagRef $ heightBagRemove oldParentHeight
20752262 return $ IntMap.elems oldParents
2076− let s = Subscriber
2263+ let changeSubscriber = Subscriber
20772264 { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
20782265 tracePropagate (Proxy :: Proxy x) $ "SubscriberMergeInt/Change"
20792266 defer $ updateMe a
20802267 , subscriberInvalidateHeight = \_ -> return ()
20812268 , subscriberRecalculateHeight = \_ -> return ()
20822269 }
2083− (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) s
2270+ (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
20842271 forM_ change $ \c -> defer $ updateMe c
20852272 -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
20862273 -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
20872274 -- its subscription.
2088− liftIO $ writeIORef changeSubdRef (s, changeSubscription)
2275+ liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
20892276 let unsubscribeAll = traverse_ unsubscribe =<< FastMutableIntMap.getFrozenAndClear parents
2090− return ( EventSubscription unsubscribeAll $ EventSubscribed heightRef $ toAny (parents, changeSubdRef)
2091− , occ
2092− )
2277+
2278+
2279+ return (EventSubscription unsubscribeAll subscribed, occ)
20932280
20942281newtype EventSelector x k = EventSelector { select :: forall a. k a -> Event x a }
20952282newtype EventSelectorG x k v = EventSelectorG { selectG :: forall a. k a -> Event x (v a) }
@@ -2172,19 +2359,19 @@ runFrame a = SpiderHost $ do
21722359 coincidenceInfos <- readIORef $ eventEnvResetCoincidences env
21732360 forM_ toAssign $ \(SomeAssignment vRef iRef v) -> {-# SCC "assignment" #-} do
21742361 writeIORef vRef v
2175− when debugInvalidate $ putStrLn $ "Invalidating Hold"
2362+ traceInvalidate $ "Invalidating Hold"
21762363 writeIORef iRef =<< evaluate =<< invalidate toReconnectRef =<< readIORef iRef
21772364 mergeUpdates <- readIORef $ eventEnvMergeUpdates env
21782365 writeIORef (eventEnvMergeUpdates env) []
2179− when debugPropagate $ putStrLn "Updating merges"
2366+ tracePropagate (Proxy::Proxy x) $ "Updating merges"
21802367 mergeSubscriptionsToKill <- runEventM $ concat <$> mapM _someMergeUpdate_update mergeUpdates
2181− when debugPropagate $ putStrLn "Updating merges done"
2368+ tracePropagate (Proxy::Proxy x) $ "Updating merges done"
21822369 toReconnect <- readIORef toReconnectRef
21832370 clearEventEnv env
21842371 switchSubscriptionsToKill <- forM toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
21852372 oldSubscription <- readIORef $ switchSubscribedCurrentParent subscribed
21862373 wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
2187− when debugInvalidate $ putStrLn $ "Finalizing invalidator for Switch" <> showNodeId subscribed
2374+ traceInvalidate $ "Finalizing invalidator for Switch" <> showNodeId subscribed
21882375 finalize wi
21892376 i <- evaluate $ switchSubscribedOwnInvalidator subscribed
21902377 wi' <- mkWeakPtrWithDebug i "wi'"
@@ -2198,7 +2385,7 @@ runFrame a = SpiderHost $ do
21982385 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
21992386 {-
22002387 stackTrace <- liftIO $ fmap renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
2201− liftIO $ putStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
2388+ liftIO $ debugStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
22022389 EventRoot _ -> "EventRoot"
22032390 EventNever -> "EventNever"
22042391 _ -> "something else"
@@ -2333,6 +2520,8 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Event
23332520 {-# INLINABLE headE #-}
23342521 headE = R.slowHeadE
23352522-- headE (SpiderEvent e) = SpiderEvent <$> Reflex.Spider.Internal.headE e
2523+ {-# INLINABLE now #-}
2524+ now = nowSpiderEventM
23362525
23372526instance Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPullM x) where
23382527 {-# INLINABLE sample #-}
@@ -2354,6 +2543,9 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Spide
23542543 {-# INLINABLE headE #-}
23552544 headE = R.slowHeadE
23562545-- headE (SpiderEvent e) = SpiderPushM $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2546+ {-# INLINABLE now #-}
2547+ now = SpiderPushM nowSpiderEventM
2548+
23572549
23582550instance HasSpiderTimeline x => Monad (Reflex.Class.Dynamic (SpiderTimeline x)) where
23592551 {-# INLINE return #-}
@@ -2417,6 +2609,9 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Spide
24172609 buildDynamic getV0 e = runFrame . runSpiderHostFrame $ Reflex.Class.buildDynamic getV0 e
24182610 {-# INLINABLE headE #-}
24192611 headE e = runFrame . runSpiderHostFrame $ Reflex.Class.headE e
2612+ {-# INLINABLE now #-}
2613+ now = runFrame . runSpiderHostFrame $ Reflex.Class.now
2614+
24202615
24212616instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHostFrame x) where
24222617 sample = SpiderHostFrame . readBehaviorUntracked . unSpiderBehavior --TODO: This can cause problems with laziness, so we should get rid of it if we can
@@ -2433,6 +2628,8 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Spide
24332628 {-# INLINABLE headE #-}
24342629 headE = R.slowHeadE
24352630-- headE (SpiderEvent e) = SpiderHostFrame $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2631+ {-# INLINABLE now #-}
2632+ now = SpiderHostFrame Reflex.Class.now
24362633
24372634instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHost x) where
24382635 {-# INLINABLE sample #-}
@@ -2453,6 +2650,8 @@ instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Refle
24532650 buildDynamic getV0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.buildDynamic getV0 e
24542651 {-# INLINABLE headE #-}
24552652 headE e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.headE e
2653+ {-# INLINABLE now #-}
2654+ now = Reflex.Spider.Internal.ReadPhase Reflex.Class.now
24562655
24572656--------------------------------------------------------------------------------
24582657-- Deprecated items
@@ -2490,13 +2689,13 @@ instance HasSpiderTimeline x => Reflex.Host.Class.MonadReadEvent (SpiderTimeline
24902689 touch h
24912690 return result
24922691
2493−instance Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHost x) where
2692+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHost x) where
24942693 newEventWithTrigger = SpiderHost . fmap SpiderEvent . newEventWithTriggerIO
24952694 newFanEventWithTrigger f = SpiderHost $ do
24962695 es <- newFanEventWithTriggerIO f
24972696 return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
24982697
2499−instance Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHostFrame x) where
2698+instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHostFrame x) where
25002699 newEventWithTrigger = SpiderHostFrame . EventM . liftIO . fmap SpiderEvent . newEventWithTriggerIO
25012700 newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
25022701 es <- newFanEventWithTriggerIO f
@@ -2576,7 +2775,7 @@ instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
25762775 fanG e = R.EventSelectorG $ SpiderEvent . selectG (fanG (unSpiderEvent e))
25772776 {-# INLINABLE mergeG #-}
25782777 mergeG
2579− :: forall (k :: k2 -> *) q (v :: k2 -> *). GCompare k
2778+ :: forall k2 (k :: k2 -> *) q (v :: k2 -> *). GCompare k
25802779 => (forall a. q a -> R.Event (SpiderTimeline x) (v a))
25812780 -> DMap k q
25822781 -> R.Event (SpiderTimeline x) (DMap k v)
@@ -2682,12 +2881,12 @@ instance NotReady (SpiderTimeline x) (SpiderHostFrame x) where
26822881 notReadyUntil _ = pure ()
26832882 notReady = pure ()
26842883
2685−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)
26862885newEventWithTriggerIO f = do
26872886 es <- newFanEventWithTriggerIO $ \Refl -> f
26882887 return $ select es Refl
26892888
2690−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)
26912890newFanEventWithTriggerIO f = do
26922891 occRef <- newIORef DMap.empty
26932892 subscribedRef <- newIORef DMap.empty
@@ -2728,4 +2927,4 @@ instance NotReady (SpiderTimeline x) (SpiderHost x) where
27282927
27292928instance HasSpiderTimeline x => NotReady (SpiderTimeline x) (PerformEventT (SpiderTimeline x) (SpiderHost x)) where
27302929 notReadyUntil _ = return ()
2731− notReady = return ()
2930+ notReady = return ()