@@ -9,125 +9,72 @@
99{-# LANGUAGE GADTs #-}
1010{-# LANGUAGE GeneralizedNewtypeDeriving #-}
1111{-# LANGUAGE LambdaCase #-}
12+{-# LANGUAGE MagicHash #-}
13+{-# LANGUAGE MultiParamTypeClasses #-}
14+{-# LANGUAGE MultiWayIf #-}
1215{-# LANGUAGE RankNTypes #-}
1316{-# LANGUAGE RoleAnnotations #-}
1417{-# LANGUAGE ScopedTypeVariables #-}
1518{-# LANGUAGE TypeFamilies #-}
1619{-# LANGUAGE TypeOperators #-}
1720{-# LANGUAGE UndecidableInstances #-}
18−{-# LANGUAGE PolyKinds #-}
19−{-# LANGUAGE DeriveFunctor #-}
20−{-# LANGUAGE StandaloneDeriving #-}
21−{-# LANGUAGE InstanceSigs #-}
22−{-# LANGUAGE MultiWayIf #-}
23−
24−#ifdef USE_REFLEX_OPTIMIZER
25−{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
26−#endif
27−{-# OPTIONS_GHC -Wunused-binds #-}
2821-- | This module is the implementation of the 'Spider' 'Reflex' engine. It uses
2922-- a graph traversal algorithm to propagate 'Event's and 'Behavior's.
30−module Reflex.Spider.Internal (module Reflex.Spider.Internal) where
31−
32−#if MIN_VERSION_base(4,10,0)
33−import Control.Applicative (liftA2)
34−#endif
23+module Reflex.Spider.Internal
24+ ( Spider
25+ , SpiderEnv (..)
26+ , Global
27+ , SpiderHost
28+ , runSpiderHost
29+ , newSpiderEnv
30+ , askSpiderEnv
31+ ) where
32+
33+import Control.Applicative
3534import Control.Concurrent
3635import Control.Exception
37−import Control.Monad hiding (forM, forM_, mapM, mapM_)
36+import Control.Monad hiding (forM, forM_, mapM, mapM_, sequence)
3837import Control.Monad.Exception
39−import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_)
38+import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_, sequence)
4039import Control.Monad.Primitive
41−import Control.Monad.Reader.Class
42−import Control.Monad.IO.Class
43−import Control.Monad.ReaderIO
40+import Control.Monad.Reader hiding (forM, forM_, mapM, mapM_, sequence)
4441import Control.Monad.Ref
45−import Control.Monad.Fail (MonadFail)
46−import qualified Control.Monad.Fail as MonadFail
42+import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
4743import Data.Align
4844import Data.Coerce
49−import Data.Dependent.Map (DMap)
45+import Data.Dependent.Map (DMap, DSum (..))
5046import 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
5447import Data.Foldable hiding (concat, elem, sequence_)
55−import Data.Functor.Constant
56−import Data.Functor.Misc
57−import Data.Functor.Product
48+import Data.Function
49+import Data.Functor.Compose
5850import Data.GADT.Compare
5951import Data.IntMap.Strict (IntMap)
6052import qualified Data.IntMap.Strict as IntMap
6153import Data.IORef
62−import Data.Kind (Type)
63−import Data.Maybe hiding (mapMaybe)
54+import Data.List hiding (foldl')
55+import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
56+import qualified Data.List.NonEmpty as NonEmpty
57+import Data.Maybe
6458import Data.Monoid (mempty, (<>))
65−import Data.Proxy
59+import Data.Some (Some)
60+import qualified Data.Some as Some
6661import Data.These
6762import Data.Traversable
68−import Data.Type.Equality ((:~:)(Refl))
69−import Data.Witherable (Filterable, mapMaybe)
70−import GHC.Exts hiding (toList)
63+import Data.Tree (Forest, Tree (..), drawForest)
64+import Data.Word
7165import GHC.IORef (IORef (..))
7266import GHC.Stack
73−import Reflex.FastWeak
7467import System.IO.Unsafe
7568import System.Mem.Weak
7669import Unsafe.Coerce
7770
78−#ifdef MIN_VERSION_semialign
79−#if MIN_VERSION_these(0,8,0)
80−import Data.These.Combinators (justThese)
81−#endif
82−#if MIN_VERSION_semialign(1,1,0)
83−import Data.Zip (Zip (..))
84−#endif
85−#endif
86−
87−#ifdef DEBUG_CYCLES
88−import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
89−#endif
90−
91−import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
92−import qualified Data.List.NonEmpty as NonEmpty
93−import Data.Tree (Forest, Tree (..), drawForest)
94−import Data.List (isPrefixOf)
95−
96−import Data.FastWeakBag (FastWeakBag, FastWeakBagTicket)
97−import qualified Data.FastWeakBag as FastWeakBag
98−
99−import Data.Reflection
100−import Data.Some (Some(Some))
101−import Data.Type.Coercion
102−import Data.Profunctor.Unsafe ((#.), (.#))
103−import Data.WeakBag (WeakBag, WeakBagTicket, _weakBag_children)
71+import Data.WeakBag (WeakBag, WeakBagTicket)
10472import qualified Data.WeakBag as WeakBag
105−import qualified Reflex.Class
10673import qualified Reflex.Class as R
107−import qualified Reflex.Host.Class
108−import Reflex.NotReady.Class
109−import Data.Patch
110−import qualified Data.Patch.DMapWithMove as PatchDMapWithMove
111−import Reflex.PerformEvent.Base (PerformEventT)
112−
113−#ifdef DEBUG_TRACE_EVENTS
114−import qualified Data.ByteString.Char8 as BS8
115−import System.IO (stderr)
116−import Data.List (isPrefixOf)
117−#endif
118−
119−-- TODO stdout might not be the best channel for debug output
120−debugStrLn :: String -> IO ()
121−debugStrLn = putStrLn
74+import qualified Reflex.Host.Class as R
12275
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
76+-- Note: must come last to silence warnings due to AMP on GHC < 7.10
77+import Prelude hiding (any, concat, mapM, mapM_, sequence)
13178
13279debugPropagate :: Bool
13380
@@ -136,42 +83,31 @@ debugInvalidateHeight :: Bool
13683debugInvalidate :: Bool
13784
13885#ifdef DEBUG
86+
13987#define DEBUG_NODEIDS
14088
141−#ifdef DEBUG_TRACE_PROPAGATION
14289debugPropagate = True
143−#else
144−debugPropagate = False
145−#endif
14690
147−#ifdef DEBUG_TRACE_HEIGHT
148−debugInvalidateHeight = True
149−#else
15091debugInvalidateHeight = False
151−#endif
15292
153−#ifdef DEBUG_TRACE_INVALIDATION
15493debugInvalidate = True
155−#else
156−debugInvalidate = False
157−#endif
15894
15995class HasNodeId a where
16096 getNodeId :: a -> Int
16197
162−instance HasNodeId (CacheSubscribed x a) where
163− getNodeId = _cacheSubscribed_nodeId
164−
165−instance HasNodeId (FanInt x a) where
166− getNodeId = _fanInt_nodeId
167−
168−instance HasNodeId (Hold x p) where
98+instance HasNodeId (Hold x p a) where
16999 getNodeId = holdNodeId
170100
101+instance HasNodeId (PushSubscribed x a b) where
102+ getNodeId = pushSubscribedNodeId
103+
171104instance HasNodeId (SwitchSubscribed x a) where
172105 getNodeId = switchSubscribedNodeId
173106
174−instance HasNodeId (FanSubscribed x v a) where
107+instance HasNodeId (MergeSubscribed x a) where
108+ getNodeId = mergeSubscribedNodeId
109+
110+instance HasNodeId (FanSubscribed x a) where
175111 getNodeId = fanSubscribedNodeId
176112
177113instance HasNodeId (CoincidenceSubscribed x a) where
@@ -185,16 +121,41 @@ instance HasNodeId (Pull x a) where
185121
186122{-# INLINE showNodeId #-}
187123showNodeId :: HasNodeId a => a -> String
188−showNodeId = showNodeId' . getNodeId
189−
190−showNodeId' :: Int -> String
191−showNodeId' = ("#"<>) . show
192−
124+showNodeId = ("#"<>) . show . getNodeId
125+
126+showSubscriberType :: Subscriber x a -> String
127+showSubscriberType = \case
128+ SubscriberPush _ _ -> "SubscriberPush"
129+ SubscriberMerge _ _ -> "SubscriberMerge"
130+ SubscriberFan _ -> "SubscriberFan"
131+ SubscriberMergeChange _ -> "SubscriberMergeChange"
132+ SubscriberHold _ -> "SubscriberHold"
133+ SubscriberHoldIdentity _ -> "SubscriberHoldIdentity"
134+ SubscriberSwitch _ -> "SubscriberSwitch"
135+ SubscriberCoincidenceOuter _ -> "SubscriberCoincidenceOuter"
136+ SubscriberCoincidenceInner _ -> "SubscriberCoincidenceInner"
137+ SubscriberHandle -> "SubscriberHandle"
138+
139+showEventType :: Event x a -> String
140+showEventType = \case
141+ EventRoot _ _ -> "EventRoot"
142+ EventNever -> "EventNever"
143+ EventPush _ -> "EventPush"
144+ EventMerge _ -> "EventMerge"
145+ EventFan _ _ -> "EventFan"
146+ EventSwitch _ -> "EventSwitch"
147+ EventCoincidence _ -> "EventCoincidence"
148+ EventHold _ -> "EventHold"
149+ EventDyn _ -> "EventDyn"
150+ EventHoldIdentity _ -> "EventHoldIdentity"
151+ EventDynIdentity _ -> "EventDynIdentity"
193152
194153#else
195154
196155debugPropagate = False
156+
197157debugInvalidateHeight = False
158+
198159debugInvalidate = False
199160
200161-- This must be inline, or error messages will cause memory leaks due to retaining the node in question
@@ -202,10 +163,6 @@ debugInvalidate = False
202163showNodeId :: a -> String
203164showNodeId _ = ""
204165
205−{-# INLINE showNodeId' #-}
206−showNodeId' :: Int -> String
207−showNodeId' _ = ""
208−
209166#endif
210167
211168#ifdef DEBUG_NODEIDS
@@ -215,240 +172,64 @@ nextNodeIdRef = unsafePerformIO $ newIORef 1
215172
216173newNodeId :: IO Int
217174newNodeId = atomicModifyIORef' nextNodeIdRef $ \n -> (succ n, n)
218−#endif
219−
220−--------------------------------------------------------------------------------
221−-- EventSubscription
222−--------------------------------------------------------------------------------
223−
224−--NB: Once you subscribe to an Event, you must always hold on the the WHOLE EventSubscription you get back
225−-- If you do not retain the subscription, you may be prematurely unsubscribed from the parent event.
226−data EventSubscription x = EventSubscription
227− { _eventSubscription_unsubscribe :: !(IO ())
228− , _eventSubscription_subscribed :: {-# UNPACK #-} !(EventSubscribed x)
229− }
230175
231−unsubscribe :: EventSubscription x -> IO ()
232−unsubscribe (EventSubscription u _) = u
176+{-# NOINLINE unsafeNodeId #-}
177+unsafeNodeId :: a -> Int
178+unsafeNodeId a = unsafePerformIO $ do
179+ touch a
180+ newNodeId
181+#endif
233182
234183--------------------------------------------------------------------------------
235184-- Event
236185--------------------------------------------------------------------------------
237186
238−newtype Event x a = Event { unEvent :: Subscriber x a -> EventM x (EventSubscription x, Maybe a) }
239−
240−{-# INLINE subscribeAndRead #-}
241−subscribeAndRead :: Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
242−subscribeAndRead = unEvent
243−
244−{-# RULES
245−"cacheEvent/cacheEvent" forall e. cacheEvent (cacheEvent e) = cacheEvent e
246−"cacheEvent/pushCheap" forall f e. pushCheap f (cacheEvent e) = cacheEvent (pushCheap f e)
247−"hold/cacheEvent" forall f e. hold f (cacheEvent e) = hold f e
248− #-}
249−
250−-- | Construct an 'Event' equivalent to that constructed by 'push', but with no
251−-- caching; if the computation function is very cheap, this is (much) more
252−-- efficient than 'push'
253−{-# INLINE [1] pushCheap #-}
254−pushCheap :: HasSpiderTimeline x => (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
255−pushCheap !f e = Event $ \sub -> do
256− (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "push" $ sub
257− { subscriberPropagate = \a -> do
258− mb <- f a
259− mapM_ (subscriberPropagate sub) mb
260− }
261− occ' <- join <$> mapM f occ
262− return (subscription, occ')
263−
264−-- | A subscriber that never triggers other 'Event's
265−{-# INLINE terminalSubscriber #-}
266−terminalSubscriber :: (a -> EventM x ()) -> Subscriber x a
267−terminalSubscriber p = Subscriber
268− { subscriberPropagate = p
269− , subscriberInvalidateHeight = \_ -> return ()
270− , subscriberRecalculateHeight = \_ -> return ()
271− }
272−
273−-- | Subscribe to an Event only for the duration of one occurrence
274−{-# INLINE subscribeAndReadHead #-}
275−subscribeAndReadHead :: HasSpiderTimeline x => Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
276−subscribeAndReadHead e sub = do
277− subscriptionRef <- liftIO $ newIORef $ error "subscribeAndReadHead: not initialized"
278− (subscription, occ) <- subscribeAndRead e $ debugSubscriber' "head" $ sub
279− { subscriberPropagate = \a -> do
280− liftIO $ unsubscribe =<< readIORef subscriptionRef
281− subscriberPropagate sub a
282− }
283− liftIO $ case occ of
284− Nothing -> writeIORef subscriptionRef $! subscription
285− Just _ -> unsubscribe subscription
286− return (subscription, occ)
287−
288−--TODO: Make this lazy in its input event
289−headE :: (MonadIO m, Defer (SomeMergeInit x) m, HasSpiderTimeline x) => Event x a -> m (Event x a)
290−headE originalE = do
291− parent <- liftIO $ newIORef $ Just originalE
292− defer $ SomeMergeInit $ do --TODO: Rename SomeMergeInit appropriately
293− let clearParent = liftIO $ writeIORef parent Nothing
294− (_, occ) <- subscribeAndReadHead originalE $ terminalSubscriber $ const clearParent
295− when (isJust occ) clearParent
296− return $ Event $ \sub ->
297− liftIO (readIORef parent) >>= \case
298− Nothing -> subscribeAndReadNever
299− Just e -> subscribeAndReadHead e sub
300−
301−data CacheSubscribed x a
302− = CacheSubscribed { _cacheSubscribed_subscribers :: {-# UNPACK #-} !(FastWeakBag (Subscriber x a))
303− , _cacheSubscribed_parent :: {-# UNPACK #-} !(EventSubscription x)
304− , _cacheSubscribed_occurrence :: {-# UNPACK #-} !(IORef (Maybe a))
305−#ifdef DEBUG_NODEIDS
306− , _cacheSubscribed_nodeId :: {-# UNPACK #-} !Int
307−#endif
308− }
309−
310−nowSpiderEventM :: (HasSpiderTimeline x) => EventM x (R.Event (SpiderTimeline x) ())
311−nowSpiderEventM =
312− SpiderEvent <$> now
313−
314−now :: (MonadIO m, Defer (Some Clear) m, HasSpiderTimeline x
315− ) => m (Event x ())
316−now = do
317− nowOrNot <- liftIO $ newIORef $ Just ()
318− scheduleClear nowOrNot
319− return . Event $ \_ -> do
320− occ <- liftIO . readIORef $ nowOrNot
321− return ( EventSubscription (return ()) eventSubscribedNow
322− , occ
323− )
324−
325−-- | Construct an 'Event' whose value is guaranteed not to be recomputed
326−-- repeatedly
327−--
328−--TODO: Try a caching strategy where we subscribe directly to the parent when
329−--there's only one subscriber, and then build our own FastWeakBag only when a second
330−--subscriber joins
331−{-# NOINLINE [0] cacheEvent #-}
332−cacheEvent :: forall x a. HasSpiderTimeline x => Event x a -> Event x a
333−cacheEvent e =
334−#ifdef DEBUG_TRACE_EVENTS
335− withStackOneLine $ \callSite -> Event $
336−#else
337− Event $
338−#endif
339− unsafePerformIO $ do
340− mSubscribedRef :: IORef (FastWeak (CacheSubscribed x a))
341− <- newIORef emptyFastWeak
342− pure $ \sub -> {-# SCC "cacheEvent" #-} do
343−#ifdef DEBUG_TRACE_EVENTS
344− unless (BS8.null callSite) $ liftIO $ BS8.hPutStrLn stderr callSite
345−#endif
346− subscribedTicket <- liftIO (readIORef mSubscribedRef >>= getFastWeakTicket) >>= \case
347− Just subscribedTicket -> return subscribedTicket
348− Nothing -> do
349−#ifdef DEBUG_NODEIDS
350− nodeId <- liftIO newNodeId
351−#endif
352− subscribers <- liftIO FastWeakBag.empty
353− occRef <- liftIO $ newIORef Nothing -- This should never be read prior to being set below
354−#ifdef DEBUG_NODEIDS
355− (parentSub, occ) <- subscribeAndRead e $ debugSubscriber' ("cacheEvent" <> showNodeId' nodeId) $ Subscriber
356−#else
357− (parentSub, occ) <- subscribeAndRead e $ Subscriber
358−#endif
359− { subscriberPropagate = \a -> do
360− liftIO $ writeIORef occRef (Just a)
361− scheduleClear occRef
362− propagateFast a subscribers
363− , subscriberInvalidateHeight = FastWeakBag.traverse_ subscribers . invalidateSubscriberHeight
364− , subscriberRecalculateHeight = FastWeakBag.traverse_ subscribers . recalculateSubscriberHeight
365− }
366− when (isJust occ) $ do
367− liftIO $ writeIORef occRef occ -- Set the initial value of occRef; we don't need to do this if occ is Nothing
368− scheduleClear occRef
369− let !subscribed = CacheSubscribed
370− { _cacheSubscribed_subscribers = subscribers
371− , _cacheSubscribed_parent = parentSub
372− , _cacheSubscribed_occurrence = occRef
373−#ifdef DEBUG_NODEIDS
374− , _cacheSubscribed_nodeId = nodeId
375−#endif
376− }
377− subscribedTicket <- liftIO $ mkFastWeakTicket subscribed
378− liftIO $ writeIORef mSubscribedRef =<< getFastWeakTicketWeak subscribedTicket
379− return subscribedTicket
380− liftIO $ cacheSubscription sub mSubscribedRef subscribedTicket
381−
382−cacheSubscription :: Subscriber x a -> IORef (FastWeak (CacheSubscribed x a))
383− -> FastWeakTicket (CacheSubscribed x a) -> IO (EventSubscription x, Maybe a)
384−cacheSubscription sub mSubscribedRef subscribedTicket = do
385− subscribed <- getFastWeakTicketValue subscribedTicket
386− ticket <- FastWeakBag.insert sub $ _cacheSubscribed_subscribers subscribed
387− occ <- readIORef $ _cacheSubscribed_occurrence subscribed
388−
389− let parentSub = _cacheSubscribed_parent subscribed
390− es = EventSubscription
391− { _eventSubscription_unsubscribe = do
392− FastWeakBag.remove ticket
393−
394− isEmpty <- FastWeakBag.isEmpty $ _cacheSubscribed_subscribers subscribed
395− when isEmpty $ do
396− writeIORef mSubscribedRef emptyFastWeak
397− unsubscribe parentSub
398− touch ticket
399− touch subscribedTicket
400− , _eventSubscription_subscribed = EventSubscribed
401− { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed parentSub
402− , eventSubscribedRetained = toAny subscribedTicket
403−#ifdef DEBUG_CYCLES
404− , eventSubscribedGetParents = return [_eventSubscription_subscribed parentSub]
405− , eventSubscribedHasOwnHeightRef = False
406− , eventSubscribedWhoCreated = whoCreatedIORef mSubscribedRef
407−#endif
408− }
409− }
410− return (es, occ)
411−
187+newtype Event x a = Event { subscribe :: Subscriber x a -> EventM x (EventSubscription x a) }
412188
413−subscribe :: Event x a -> Subscriber x a -> EventM x (EventSubscription x)
414−subscribe e s = fst <$> subscribeAndRead e s
415−
416−{-# INLINE wrap #-}
417−wrap :: MonadIO m => (t -> EventSubscribed x) -> (Subscriber x a -> m (WeakBagTicket, t, Maybe a)) -> Subscriber x a -> m (EventSubscription x, Maybe a)
189+wrap :: Monad m => (t -> EventSubscribed x a) -> (Subscriber x a -> m (WeakBagTicket (Subscriber x a), t)) -> Subscriber x a -> m (EventSubscription x a)
418190wrap tag getSpecificSubscribed sub = do
419− (sln, subd, occ) <- getSpecificSubscribed sub
420− let es = tag subd
421− return (EventSubscription (WeakBag.remove sln >> touch sln) es, occ)
422−
423−eventRoot :: (GCompare k, HasSpiderTimeline x) => k a -> Root x k -> Event x a
424−eventRoot !k !r = Event $ wrap eventSubscribedRoot $ liftIO . getRootSubscribed k r
191+ (sln, subd) <- getSpecificSubscribed sub
192+ return $ EventSubscription (Just sln) $ tag subd
425193
426−subscribeAndReadNever :: EventM x (EventSubscription x, Maybe a)
427−subscribeAndReadNever = return (EventSubscription (return ()) eventSubscribedNever, Nothing)
194+eventRoot :: GCompare k => k a -> Root x k -> Event x a
195+eventRoot !k !r = Event $ wrap EventSubscribedRoot $ liftIO . getRootSubscribed k r
428196
429197eventNever :: Event x a
430−eventNever = Event $ const subscribeAndReadNever
198+eventNever = Event $ \_ -> return $ EventSubscription Nothing EventSubscribedNever
431199
432−eventFan :: (GCompare k, HasSpiderTimeline x) => k a -> Fan x k v -> Event x (v a)
433−eventFan !k !f = Event $ wrap eventSubscribedFan $ getFanSubscribed k f
200+eventPush :: Push x b a -> Event x a
201+eventPush !p = Event $ wrap EventSubscribedPush $ getPushSubscribed p
434202
435−eventSwitch :: HasSpiderTimeline x => Switch x a -> Event x a
436−eventSwitch !s = Event $ wrap eventSubscribedSwitch $ getSwitchSubscribed s
203+eventMerge :: (GCompare k, a ~ DMap k Identity) => Merge x k -> Event x a
204+eventMerge !m = Event $ wrap EventSubscribedMerge $ getMergeSubscribed m
437205
438−eventCoincidence :: HasSpiderTimeline x => Coincidence x a -> Event x a
439−eventCoincidence !c = Event $ wrap eventSubscribedCoincidence $ getCoincidenceSubscribed c
206+eventFan :: GCompare k => k a -> Fan x k -> Event x a
207+eventFan !k !f = Event $ wrap (EventSubscribedFan k) $ getFanSubscribed k f
440208
441−eventHold :: Hold x p -> Event x p
209+eventSwitch :: Switch x a -> Event x a
210+eventSwitch !s = Event $ wrap EventSubscribedSwitch $ getSwitchSubscribed s
211+
212+eventCoincidence :: Coincidence x a -> Event x a
213+eventCoincidence !c = Event $ wrap EventSubscribedCoincidence $ getCoincidenceSubscribed c
214+
215+eventHold :: (a ~ p b, R.Patch p) => Hold x p b -> Event x a
442216eventHold !h = Event $ subscribeHoldEvent h
443217
444−eventDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> Event x p
218+eventDyn :: (a ~ p b, R.Patch p) => Dyn x p b -> Event x a
445219eventDyn !j = Event $ \sub -> getDynHold j >>= \h -> subscribeHoldEvent h sub
446220
221+eventHoldIdentity :: (a ~ Identity b) => Hold x Identity b -> Event x a
222+eventHoldIdentity !h = Event $ subscribeHoldEvent h
223+
224+eventDynIdentity :: (a ~ Identity b) => Dyn x Identity b -> Event x a
225+eventDynIdentity !j = Event $ \sub -> getDynHold j >>= \h -> subscribeHoldEvent h sub
226+
447227{-# INLINE subscribeCoincidenceInner #-}
448−subscribeCoincidenceInner :: HasSpiderTimeline x => Event x a -> Height -> CoincidenceSubscribed x a -> EventM x (Maybe a, Height, EventSubscribed x)
228+subscribeCoincidenceInner :: CanSubscribe x m => Event x a -> Height -> CoincidenceSubscribed x a -> m (Maybe a, Height, EventSubscribed x a)
449229subscribeCoincidenceInner inner outerHeight subscribedUnsafe = do
450230 subInner <- liftIO $ newSubscriberCoincidenceInner subscribedUnsafe
451− (subscription@(EventSubscription _ innerSubd), innerOcc) <- subscribeAndRead inner subInner
231+ subscription@(EventSubscription _ innerSubd) <- subscribe inner subInner
232+ innerOcc <- liftIO $ readEventSubscribed innerSubd
452233 innerHeight <- liftIO $ getEventSubscribedHeight innerSubd
453234 let height = max innerHeight outerHeight
454235 defer $ SomeResetCoincidence subscription $ if height > outerHeight then Just subscribedUnsafe else Nothing
@@ -464,75 +245,166 @@ data Subscriber x a = Subscriber
464245 , subscriberRecalculateHeight :: !(Height -> IO ())
465246 }
466247
467−newSubscriberHold :: (HasSpiderTimeline x, Patch p) => Hold x p -> IO (Subscriber x p)
248+--TODO: Move this comment to WeakBag
249+-- These function are constructor functions that are marked NOINLINE so they are
250+-- opaque to GHC. If we do not do this, then GHC will sometimes fuse the constructor away
251+-- so any weak references that are attached to the constructors will have their
252+-- finalizer run. Using the opaque constructor, does not see the
253+-- constructor application, so it behaves like an IORef and cannot be fused away.
254+--
255+-- The result is also evaluated to WHNF, since forcing a thunk invalidates
256+-- the weak pointer to it in some cases.
257+
258+newSubscriberPush :: (a -> ComputeM x (Maybe b)) -> PushSubscribed x a b -> IO (Subscriber x a)
259+newSubscriberPush compute subscribed = return $ Subscriber
260+ { subscriberPropagate = \a -> {-# SCC "traversePush" #-} do
261+ tracePropagate $ "SubscriberPush" <> showNodeId subscribed
262+ occ <- runComputeM $ compute a
263+ case occ of
264+ Nothing -> return () -- No need to write a Nothing back into the Ref
265+ Just o -> do
266+ liftIO $ writeIORef (pushSubscribedOccurrence subscribed) occ
267+ scheduleClear $ pushSubscribedOccurrence subscribed
268+ propagate o $ pushSubscribedSubscribers subscribed
269+ , subscriberInvalidateHeight = \old -> do
270+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
271+ WeakBag.traverse (pushSubscribedSubscribers subscribed) $ invalidateSubscriberHeight old
272+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
273+ , subscriberRecalculateHeight = \new -> do
274+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed
275+ WeakBag.traverse (pushSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
276+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberPush" <> showNodeId subscribed <> " done"
277+ }
278+
279+newSubscriberHold :: R.Patch p => Hold x p a -> IO (Subscriber x (p a))
468280newSubscriberHold h = return $ Subscriber
469281 { subscriberPropagate = {-# SCC "traverseHold" #-} propagateSubscriberHold h
470282 , subscriberInvalidateHeight = \_ -> return ()
471283 , subscriberRecalculateHeight = \_ -> return ()
472284 }
473285
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
286+newSubscriberMerge :: GCompare k => k a -> MergeSubscribed x k -> IO (Subscriber x a)
287+newSubscriberMerge k subscribed = return $ Subscriber
288+ { subscriberPropagate = \a -> {-# SCC "traverseMerge" #-} do
289+ tracePropagate $ "SubscriberMerge" <> showNodeId subscribed
290+ oldM <- liftIO $ readIORef $ mergeSubscribedAccum subscribed
291+ let newM = DMap.insertWith (error $ "Same key fired multiple times for Merge" <> showNodeId subscribed) k (Identity a) oldM
292+ tracePropagate $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
293+ liftIO $ writeIORef (mergeSubscribedAccum subscribed) $! newM
294+ when (DMap.null oldM) $ do -- Only schedule the firing once
295+ height <- liftIO $ readIORef $ mergeSubscribedHeight subscribed
296+ --TODO: assertions about height
297+ currentHeight <- getCurrentHeight
298+ when (height <= currentHeight) $ do
299+ myStack <- liftIO $ whoCreatedIORef $ mergeSubscribedCachedSubscribed subscribed
300+ if height /= invalidHeight
301+ then error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
302+ else liftIO $ do
303+ nodesInvolvedInCycle <- walkInvalidHeightParents $ EventSubscribedMerge subscribed
304+ stacks <- forM nodesInvolvedInCycle $ \(Some.This es) -> whoCreatedEventSubscribed es
305+ error $ "Causality loop found:\n" <> drawForest (listsToForest stacks)
306+ scheduleMerge height subscribed
307+ , subscriberInvalidateHeight = \old -> do
308+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
309+ removeMergeHeight old subscribed
310+ invalidateMergeHeight subscribed
311+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
312+ , subscriberRecalculateHeight = \new -> do
313+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed
314+ addMergeHeight new subscribed
315+ revalidateMergeHeight subscribed
316+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberMerge" <> showNodeId subscribed <> " done"
317+ }
318+
319+newSubscriberMergeChange :: GCompare k => MergeSubscribed x k -> IO (Subscriber x (R.PatchDMap (DMap k (Event x))))
320+newSubscriberMergeChange subscribed = return $ Subscriber
321+ { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
322+ tracePropagate $ "SubscriberMerge" <> showNodeId subscribed
323+ defer $ SomeMergeUpdate a subscribed
324+ , subscriberInvalidateHeight = \_ -> return ()
325+ , subscriberRecalculateHeight = \_ -> return ()
326+ }
327+
328+newSubscriberFan :: GCompare k => FanSubscribed x k -> IO (Subscriber x (DMap k Identity))
329+newSubscriberFan subscribed = return $ Subscriber
476330 { subscriberPropagate = \a -> {-# SCC "traverseFan" #-} do
477331 subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
478− tracePropagate (Proxy :: Proxy x) $ show (DMap.size subs) <> " keys subscribed, " <> show (DMap.size a) <> " keys firing"
479− liftIO $ writeIORef (fanSubscribedOccurrence subscribed) $ Just a
480− scheduleClear $ fanSubscribedOccurrence subscribed
481− let f _ (Pair v subsubs) = do
482− propagate v $ _fanSubscribedChildren_list subsubs
483− return $ Constant ()
484− _ <- DMap.traverseWithKey f $ DMap.intersectionWithKey (\_ -> Pair) a subs --TODO: Would be nice to have DMap.traverse_
485− return ()
332+ tracePropagate $ "SubscriberFan" <> showNodeId subscribed <> ": " ++ show (DMap.size subs) ++ " keys subscribed, " ++ show (DMap.size a) ++ " keys firing"
333+ --TODO: We need a better DMap intersection; here, we are assuming that the number of firing keys is small and the number of subscribers is large
334+ forM_ (DMap.toList a) $ \(k :=> Identity v) -> {-# SCC "SubscriberFan" #-} case DMap.lookup k subs of
335+ Nothing -> do
336+ tracePropagate "No subscriber for key"
337+ return ()
338+ Just subsubs -> do
339+ propagate v $ _fanSubscribedChildren_list subsubs
340+ return ()
486341 , subscriberInvalidateHeight = \old -> do
342+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
487343 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
488− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
344+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
345+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
489346 , subscriberRecalculateHeight = \new -> do
347+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
490348 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
491− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
349+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
350+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
492351 }
493352
494−newSubscriberSwitch :: forall x a. HasSpiderTimeline x => SwitchSubscribed x a -> IO (Subscriber x a)
495−newSubscriberSwitch subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
353+newSubscriberSwitch :: SwitchSubscribed x a -> IO (Subscriber x a)
354+newSubscriberSwitch subscribed = return $ Subscriber
496355 { subscriberPropagate = \a -> {-# SCC "traverseSwitch" #-} do
356+ tracePropagate $ "SubscriberSwitch" <> showNodeId subscribed
497357 liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
498358 scheduleClear $ switchSubscribedOccurrence subscribed
499359 propagate a $ switchSubscribedSubscribers subscribed
500360 , subscriberInvalidateHeight = \_ -> do
361+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
501362 oldHeight <- readIORef $ switchSubscribedHeight subscribed
502363 when (oldHeight /= invalidHeight) $ do
503364 writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
504− WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
505− , subscriberRecalculateHeight = (`updateSwitchHeight` subscribed)
506− }
365+ WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
366+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
367+ , subscriberRecalculateHeight = \new -> do
368+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
369+ updateSwitchHeight new subscribed
370+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
371+ }
507372
508−newSubscriberCoincidenceOuter :: forall x b. HasSpiderTimeline x => CoincidenceSubscribed x b -> IO (Subscriber x (Event x b))
509−newSubscriberCoincidenceOuter subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
373+newSubscriberCoincidenceOuter :: CoincidenceSubscribed x b -> IO (Subscriber x (Event x b))
374+newSubscriberCoincidenceOuter subscribed = return $ Subscriber
510375 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceOuter" #-} do
376+ tracePropagate $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
511377 outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
512− tracePropagate (Proxy :: Proxy x) $ " outerHeight = " <> show outerHeight
378+ tracePropagate $ " outerHeight = " <> show outerHeight
513379 (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
514− tracePropagate (Proxy :: Proxy x) $ " isJust occ = " <> show (isJust occ)
515− tracePropagate (Proxy :: Proxy x) $ " innerHeight = " <> show innerHeight
516−
380+ tracePropagate $ " isJust occ = " <> show (isJust occ)
381+ tracePropagate $ " innerHeight = " <> show innerHeight
517382 liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
518383 scheduleClear $ coincidenceSubscribedInnerParent subscribed
519384 case occ of
520− Nothing ->
385+ Nothing -> do
521386 when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
522387 writeIORef (coincidenceSubscribedHeight subscribed) $! innerHeight
523− WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
524− WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
388+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
389+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
525390 Just o -> do -- Since it's already firing, no need to adjust height
526391 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
527392 scheduleClear $ coincidenceSubscribedOccurrence subscribed
528393 propagate o $ coincidenceSubscribedSubscribers subscribed
529− , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
530− , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
394+ , subscriberInvalidateHeight = \_ -> do
395+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
396+ invalidateCoincidenceHeight subscribed
397+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
398+ , subscriberRecalculateHeight = \_ -> do
399+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
400+ recalculateCoincidenceHeight subscribed
401+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
531402 }
532403
533−newSubscriberCoincidenceInner :: forall x a. HasSpiderTimeline x => CoincidenceSubscribed x a -> IO (Subscriber x a)
534−newSubscriberCoincidenceInner subscribed = debugSubscriber ("SubscriberCoincidenceInner" <> showNodeId subscribed) $ Subscriber
404+newSubscriberCoincidenceInner :: CoincidenceSubscribed x a -> IO (Subscriber x a)
405+newSubscriberCoincidenceInner subscribed = return $ Subscriber
535406 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceInner" #-} do
407+ tracePropagate $ "SubscriberCoincidenceInner" <> showNodeId subscribed
536408 occ <- liftIO $ readIORef $ coincidenceSubscribedOccurrence subscribed
537409 case occ of
538410 Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
@@ -540,8 +412,14 @@ newSubscriberCoincidenceInner subscribed = debugSubscriber ("SubscriberCoinciden
540412 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
541413 scheduleClear $ coincidenceSubscribedOccurrence subscribed
542414 propagate a $ coincidenceSubscribedSubscribers subscribed
543− , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
544− , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
415+ , subscriberInvalidateHeight = \_ -> do
416+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
417+ invalidateCoincidenceHeight subscribed
418+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
419+ , subscriberRecalculateHeight = \_ -> do
420+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
421+ recalculateCoincidenceHeight subscribed
422+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
545423 }
546424
547425invalidateSubscriberHeight :: Height -> Subscriber x a -> IO ()
@@ -551,301 +429,177 @@ recalculateSubscriberHeight :: Height -> Subscriber x a -> IO ()
551429recalculateSubscriberHeight = flip subscriberRecalculateHeight
552430
553431-- | Propagate everything at the current height
554−propagate :: forall x a. HasSpiderTimeline x => a -> WeakBag (Subscriber x a) -> EventM x ()
555−propagate a subscribers = withIncreasedDepth (Proxy::Proxy x) $
556− -- Note: in the following traversal, we do not visit nodes that are added to the list during our traversal; they are new events, which will necessarily have full information already, so there is no need to traverse them
557− --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
558− WeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
559−
560−-- | Propagate everything at the current height
561−propagateFast :: forall x a. HasSpiderTimeline x => a -> FastWeakBag (Subscriber x a) -> EventM x ()
562−propagateFast a subscribers = withIncreasedDepth (Proxy::Proxy x) $
432+propagate :: a -> WeakBag (Subscriber x a) -> EventM x ()
433+propagate a subscribers = withIncreasedDepth $ do
563434 -- 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
564435 --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
436+ WeakBag.traverse subscribers $ \s -> subscriberPropagate s a
566437
567438--------------------------------------------------------------------------------
568439-- EventSubscribed
569440--------------------------------------------------------------------------------
570441
571−toAny :: a -> Any
572−toAny = unsafeCoerce
573−
574−-- Why do we use Any here, instead of just giving eventSubscribedRetained an
575−-- existential type? Sadly, GHC does not currently know how to unbox types
576−-- with existentially quantified fields. So instead we just coerce values
577−-- to type Any on the way in. Since we never coerce them back, this is
578−-- perfectly safe.
579−data EventSubscribed x = EventSubscribed
580− { eventSubscribedHeightRef :: {-# UNPACK #-} !(IORef Height)
581− , eventSubscribedRetained :: {-# NOUNPACK #-} !Any
582−#ifdef DEBUG_CYCLES
583− , eventSubscribedGetParents :: !(IO [EventSubscribed x]) -- For debugging loops
584− , eventSubscribedHasOwnHeightRef :: !Bool
585− , eventSubscribedWhoCreated :: !(IO [String])
586−#endif
587− }
588−
589−eventSubscribedRoot :: RootSubscribed x a -> EventSubscribed x
590−eventSubscribedRoot !r = EventSubscribed
591− { eventSubscribedHeightRef = zeroRef
592− , eventSubscribedRetained = toAny r
593−#ifdef DEBUG_CYCLES
594− , eventSubscribedGetParents = return []
595− , eventSubscribedHasOwnHeightRef = False
596− , eventSubscribedWhoCreated = return ["root"]
597−#endif
598− }
599−
600−eventSubscribedNever :: EventSubscribed x
601−eventSubscribedNever = EventSubscribed
602− { eventSubscribedHeightRef = zeroRef
603− , eventSubscribedRetained = toAny ()
604−#ifdef DEBUG_CYCLES
605− , eventSubscribedGetParents = return []
606− , eventSubscribedHasOwnHeightRef = False
607− , eventSubscribedWhoCreated = return ["never"]
608−#endif
609− }
610−eventSubscribedNow :: EventSubscribed x
611−eventSubscribedNow = EventSubscribed
612− { eventSubscribedHeightRef = zeroRef
613− , eventSubscribedRetained = toAny ()
614−#ifdef DEBUG_CYCLES
615− , eventSubscribedGetParents = return []
616− , eventSubscribedHasOwnHeightRef = False
617− , eventSubscribedWhoCreated = return ["now"]
618−#endif
619− }
620−
621−eventSubscribedFan :: FanSubscribed x k v -> EventSubscribed x
622−eventSubscribedFan !subscribed = EventSubscribed
623− { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
624− , eventSubscribedRetained = toAny subscribed
625−#ifdef DEBUG_CYCLES
626− , eventSubscribedGetParents = return [_eventSubscription_subscribed $ fanSubscribedParent subscribed]
627− , eventSubscribedHasOwnHeightRef = False
628− , eventSubscribedWhoCreated = whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
629−#endif
630− }
631−
632−eventSubscribedSwitch :: SwitchSubscribed x a -> EventSubscribed x
633−eventSubscribedSwitch !subscribed = EventSubscribed
634− { eventSubscribedHeightRef = switchSubscribedHeight subscribed
635− , eventSubscribedRetained = toAny subscribed
636−#ifdef DEBUG_CYCLES
637− , eventSubscribedGetParents = do
638− s <- readIORef $ switchSubscribedCurrentParent subscribed
639− return [_eventSubscription_subscribed s]
640− , eventSubscribedHasOwnHeightRef = True
641− , eventSubscribedWhoCreated = whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
642−#endif
643− }
644−
645−eventSubscribedCoincidence :: CoincidenceSubscribed x a -> EventSubscribed x
646−eventSubscribedCoincidence !subscribed = EventSubscribed
647− { eventSubscribedHeightRef = coincidenceSubscribedHeight subscribed
648− , eventSubscribedRetained = toAny subscribed
649−#ifdef DEBUG_CYCLES
650− , eventSubscribedGetParents = do
651− innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
652− let outerParent = _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
653− innerParents = maybeToList $ innerSubscription
654− return $ outerParent : innerParents
655− , eventSubscribedHasOwnHeightRef = True
656− , eventSubscribedWhoCreated = whoCreatedIORef $ coincidenceSubscribedCachedSubscribed subscribed
657−#endif
658− }
659−
660−getEventSubscribedHeight :: EventSubscribed x -> IO Height
442+data EventSubscribed x a
443+ = EventSubscribedRoot {-# NOUNPACK #-} (RootSubscribed x a)
444+ | EventSubscribedNever
445+ | forall b. EventSubscribedPush !(PushSubscribed x b a)
446+ | forall k. (GCompare k, a ~ DMap k Identity) => EventSubscribedMerge !(MergeSubscribed x k)
447+ | forall k. GCompare k => EventSubscribedFan !(k a) !(FanSubscribed x k)
448+ | EventSubscribedSwitch !(SwitchSubscribed x a)
449+ | EventSubscribedCoincidence !(CoincidenceSubscribed x a)
450+
451+readEventSubscribed :: EventSubscribed x a -> IO (Maybe a)
452+readEventSubscribed = \case
453+ EventSubscribedRoot rs -> readRootSubscribed rs
454+ EventSubscribedNever -> return Nothing
455+ EventSubscribedPush ps -> readPushSubscribed ps
456+ EventSubscribedMerge ms -> readMergeSubscribed ms
457+ EventSubscribedFan k fs -> readFanSubscribed k fs
458+ EventSubscribedSwitch ss -> readSwitchSubscribed ss
459+ EventSubscribedCoincidence cs -> readCoincidenceSubscribed cs
460+
461+{-# INLINE subscribeEventSubscribed #-}
462+subscribeEventSubscribed :: EventSubscribed x a -> Subscriber x a -> IO (Maybe (WeakBagTicket (Subscriber x a)))
463+subscribeEventSubscribed es sub = case es of
464+ EventSubscribedRoot r -> do
465+ traceSubscribe $ "subscribeEventSubscribed Root"
466+ Just <$> subscribeRootSubscribed r sub
467+ EventSubscribedNever -> do
468+ traceSubscribe $ "subscribeEventSubscribed Never"
469+ return Nothing
470+ EventSubscribedPush subscribed -> do
471+ traceSubscribe $ "subscribeEventSubscribed Push"
472+ Just <$> subscribePushSubscribed subscribed sub
473+ EventSubscribedFan k subscribed -> do
474+ traceSubscribe $ "subscribeEventSubscribed Fan"
475+ Just <$> subscribeFanSubscribed k subscribed sub
476+ EventSubscribedMerge subscribed -> do
477+ traceSubscribe $ "subscribeEventSubscribed Merge"
478+ Just <$> subscribeMergeSubscribed subscribed sub
479+ EventSubscribedSwitch subscribed -> do
480+ traceSubscribe $ "subscribeEventSubscribed Switch"
481+ Just <$> subscribeSwitchSubscribed subscribed sub
482+ EventSubscribedCoincidence subscribed -> do
483+ traceSubscribe $ "subscribeEventSubscribed Coincidence"
484+ Just <$> subscribeCoincidenceSubscribed subscribed sub
485+
486+{-# INLINE eventSubscribedGetParents #-}
487+eventSubscribedGetParents :: EventSubscribed x a -> IO [Some (EventSubscribed x)]
488+eventSubscribedGetParents = \case
489+ EventSubscribedRoot _ -> return []
490+ EventSubscribedNever -> return []
491+ EventSubscribedPush subscribed -> return [Some.This $ _eventSubscription_subscribed $ pushSubscribedParent subscribed]
492+ EventSubscribedFan _ subscribed -> return [Some.This $ _eventSubscription_subscribed $ fanSubscribedParent subscribed]
493+ EventSubscribedMerge subscribed -> do
494+ ps <- readIORef $ mergeSubscribedParents subscribed
495+ return $ R.ffor (DMap.toList ps) $ \(_ :=> v) -> Some.This $ _eventSubscription_subscribed $ mergeSubscribedParentSubscription v
496+ EventSubscribedSwitch subscribed -> do
497+ s <- readIORef $ switchSubscribedCurrentParent subscribed
498+ return [Some.This $ _eventSubscription_subscribed s]
499+ EventSubscribedCoincidence subscribed -> do
500+ innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
501+ let outerParent = Some.This $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
502+ innerParents = maybeToList $ fmap Some.This innerSubscription
503+ return $ outerParent : innerParents
504+
505+getEventSubscribedHeight :: EventSubscribed x a -> IO Height
661506getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
662507
663−#ifdef DEBUG_CYCLES
664−whoCreatedEventSubscribed :: EventSubscribed x -> IO [String]
665−whoCreatedEventSubscribed = eventSubscribedWhoCreated
666−
667−walkInvalidHeightParents :: EventSubscribed x -> IO [EventSubscribed x]
508+{-# INLINE eventSubscribedHeightRef #-}
509+eventSubscribedHeightRef :: EventSubscribed x a -> IORef Height
510+eventSubscribedHeightRef = \case
511+ EventSubscribedRoot _ -> zeroRef
512+ EventSubscribedNever -> zeroRef
513+ EventSubscribedPush subscribed -> pushSubscribedHeight subscribed
514+ EventSubscribedFan _ subscribed -> eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
515+ EventSubscribedMerge subscribed -> mergeSubscribedHeight subscribed
516+ EventSubscribedSwitch subscribed -> switchSubscribedHeight subscribed
517+ EventSubscribedCoincidence subscribed -> coincidenceSubscribedHeight subscribed
518+
519+whoCreatedEventSubscribed :: EventSubscribed x a -> IO [String]
520+whoCreatedEventSubscribed = \case
521+ EventSubscribedRoot _ -> return ["root"]
522+ EventSubscribedNever -> return ["never"]
523+ EventSubscribedPush subscribed -> whoCreatedIORef $ pushSubscribedCachedSubscribed subscribed
524+ EventSubscribedFan _ subscribed -> whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
525+ EventSubscribedMerge subscribed -> whoCreatedIORef $ mergeSubscribedCachedSubscribed subscribed
526+ EventSubscribedSwitch subscribed -> whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
527+ EventSubscribedCoincidence subscribed -> whoCreatedIORef $ coincidenceSubscribedCachedSubscribed subscribed
528+
529+{-# INLINE eventSubscribedHasOwnHeightRef #-}
530+eventSubscribedHasOwnHeightRef :: EventSubscribed x a -> Bool
531+eventSubscribedHasOwnHeightRef = \case
532+ EventSubscribedRoot _ -> False
533+ EventSubscribedNever -> False
534+ EventSubscribedPush _ -> False
535+ EventSubscribedFan _ _ -> False
536+ EventSubscribedMerge _ -> True
537+ EventSubscribedSwitch _ -> True
538+ EventSubscribedCoincidence _ -> True
539+
540+walkInvalidHeightParents :: EventSubscribed x a -> IO [Some (EventSubscribed x)]
668541walkInvalidHeightParents s0 = do
669− subscribers <- flip execStateT mempty $ ($ s0) $ fix $ \loop s -> do
542+ subscribers <- flip execStateT mempty $ ($ Some.This s0) $ fix $ \loop (Some.This s) -> do
670543 h <- liftIO $ readIORef $ eventSubscribedHeightRef s
671544 when (h == invalidHeight) $ do
672545 when (eventSubscribedHasOwnHeightRef s) $ liftIO $ writeIORef (eventSubscribedHeightRef s) $! invalidHeightBeingTraversed
673− modify (s :)
546+ modify (Some.This s :)
674547 mapM_ loop =<< liftIO (eventSubscribedGetParents s)
675− forM_ subscribers $ \s -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
548+ forM_ subscribers $ \(Some.This s) -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
676549 return subscribers
677−#endif
678550
679551{-# INLINE subscribeHoldEvent #-}
680−subscribeHoldEvent :: Hold x p -> Subscriber x p -> EventM x (EventSubscription x, Maybe p)
681−subscribeHoldEvent = subscribeAndRead . holdEvent
682−
683−--------------------------------------------------------------------------------
684−-- Behavior
685−--------------------------------------------------------------------------------
686−
687−newtype Behavior x a = Behavior { readBehaviorTracked :: BehaviorM x a }
688−
689−behaviorHold :: Hold x p -> Behavior x (PatchTarget p)
690−behaviorHold !h = Behavior $ readHoldTracked h
691−
692−behaviorHoldIdentity :: Hold x (Identity a) -> Behavior x a
693−behaviorHoldIdentity = behaviorHold
694−
695−behaviorConst :: a -> Behavior x a
696−behaviorConst !a = Behavior $ return a
697−
698−behaviorPull :: Pull x a -> Behavior x a
699−behaviorPull !p = Behavior $ do
700− val <- liftIO $ readIORef $ pullValue p
701− case val of
702− Just subscribed -> do
703− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedPull subscribed)) :))
704− askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (pullSubscribedInvalidators subscribed) (wi:))
705− liftIO $ touch $ pullSubscribedOwnInvalidator subscribed
706− return $ pullSubscribedValue subscribed
707− Nothing -> do
708− i <- liftIO $ newInvalidatorPull p
709− wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorPull"
710− parentsRef <- liftIO $ newIORef []
711− holdInits <- askBehaviorHoldInits
712− a <- liftIO $ runReaderIO (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
713− invsRef <- liftIO . newIORef . maybeToList =<< askInvalidator
714− parents <- liftIO $ readIORef parentsRef
715− let subscribed = PullSubscribed
716− { pullSubscribedValue = a
717− , pullSubscribedInvalidators = invsRef
718− , pullSubscribedOwnInvalidator = i
719− , pullSubscribedParents = parents
720− }
721− liftIO $ writeIORef (pullValue p) $ Just subscribed
722− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedPull subscribed)) :))
723− return a
724−
725−behaviorDyn :: Patch p => Dyn x p -> Behavior x (PatchTarget p)
726−behaviorDyn !d = Behavior $ readHoldTracked =<< getDynHold d
727−
728−{-# INLINE readHoldTracked #-}
729−readHoldTracked :: Hold x p -> BehaviorM x (PatchTarget p)
730−readHoldTracked h = do
731− result <- liftIO $ readIORef $ holdValue h
732− askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (holdInvalidators h) (wi:))
733− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedHold h)) :))
734− liftIO $ touch h -- Otherwise, if this gets inlined enough, the hold's parent reference may get collected
735− return result
736−
737−{-# INLINABLE readBehaviorUntracked #-}
738−readBehaviorUntracked :: Defer (SomeHoldInit x) m => Behavior x a -> m a
739−readBehaviorUntracked b = do
740− holdInits <- getDeferralQueue
741− liftIO $ runBehaviorM (readBehaviorTracked b) Nothing holdInits --TODO: Specialize readBehaviorTracked to the Nothing and Just cases
552+subscribeHoldEvent :: (CanSubscribe x m, R.Patch p) => Hold x p a -> Subscriber x (p a) -> m (EventSubscription x (p a))
553+subscribeHoldEvent h sub = do
554+ EventSubscription _ subd <- getHoldEventSubscription h
555+ sln <- liftIO $ subscribeEventSubscribed subd sub
556+ return $ EventSubscription sln subd
742557
743558--------------------------------------------------------------------------------
744−-- Dynamic
559+-- EventSubscription
745560--------------------------------------------------------------------------------
746561
747−type DynamicS x p = Dynamic x (PatchTarget p) p
748−
749−data Dynamic x target p = Dynamic
750− { dynamicCurrent :: !(Behavior x target)
751− , dynamicUpdated :: Event x p -- This must be lazy; see the comment on holdEvent --TODO: Would this let us eliminate `Dyn`?
752− }
753−
754−deriving instance (HasSpiderTimeline x) => Functor (Dynamic x target)
755−
756−
757−
758−
759−dynamicHold :: Hold x p -> DynamicS x p
760−dynamicHold !h = Dynamic
761− { dynamicCurrent = behaviorHold h
762− , dynamicUpdated = eventHold h
763− }
764−
765−dynamicHoldIdentity :: Hold x (Identity a) -> DynamicS x (Identity a)
766−dynamicHoldIdentity = dynamicHold
767−
768−dynamicConst :: PatchTarget p -> DynamicS x p
769−dynamicConst !a = Dynamic
770− { dynamicCurrent = behaviorConst a
771− , dynamicUpdated = eventNever
772− }
773−
774−dynamicDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> DynamicS x p
775−dynamicDyn !d = Dynamic
776− { dynamicCurrent = behaviorDyn d
777− , dynamicUpdated = eventDyn d
562+data EventSubscription x a = EventSubscription
563+ { _eventSubscription_ticket :: !(Maybe (WeakBagTicket (Subscriber x a)))
564+ , _eventSubscription_subscribed :: !(EventSubscribed x a)
778565 }
779566
780−dynamicDynIdentity :: HasSpiderTimeline x => Dyn x (Identity a) -> DynamicS x (Identity a)
781−dynamicDynIdentity = dynamicDyn
567+unsubscribe :: EventSubscription x a -> IO ()
568+unsubscribe (EventSubscription msln _) = forM_ msln $ \sln -> WeakBag.remove sln
782569
783570--------------------------------------------------------------------------------
784571-- Combinators
785572--------------------------------------------------------------------------------
786573
574+--TODO: Figure out why certain things are not 'representational', then make them
575+--representational so we can use coerce
576+
787577--type role Hold representational
788−data Hold x p
789− = Hold { holdValue :: !(IORef (PatchTarget p))
578+data Hold x p a
579+ = Hold { holdValue :: !(IORef a)
790580 , holdInvalidators :: !(IORef [Weak (Invalidator x)])
791− , holdEvent :: Event x p -- This must be lazy, or holds cannot be defined before their input Events
792− , holdParent :: !(IORef (Maybe (EventSubscription x))) -- Keeps its parent alive (will be undefined until the hold is initialized) --TODO: Probably shouldn't be an IORef
581+ , holdParent :: !(IORef (Either (Event x (p a)) (EventSubscription x (p a)))) -- Keeps its parent alive (will be undefined until the hold is initialized) --TODO: Probably shouldn't be an IORef
793582#ifdef DEBUG_NODEIDS
794583 , holdNodeId :: Int
795584#endif
796585 }
797586
798−-- | A statically allocated 'SpiderTimeline'
799−data Global
800−
801−{-# NOINLINE globalSpiderTimelineEnv #-}
802−globalSpiderTimelineEnv :: SpiderTimelineEnv Global
803−globalSpiderTimelineEnv = unsafePerformIO unsafeNewSpiderTimelineEnv
804−
805−-- | Stores all global data relevant to a particular Spider timeline; only one
806−-- value should exist for each type @x@
807−newtype SpiderTimelineEnv x = STE {unSTE :: SpiderTimelineEnv' x}
808−-- We implement SpiderTimelineEnv with a newtype wrapper so
809−-- we can get the coercions we want safely.
810−type role SpiderTimelineEnv nominal
811−
812−data SpiderTimelineEnv' x = SpiderTimelineEnv
813− { _spiderTimeline_lock :: {-# UNPACK #-} !(MVar ())
814− , _spiderTimeline_eventEnv :: {-# UNPACK #-} !(EventEnv x)
815−#ifdef DEBUG
816− , _spiderTimeline_depth :: {-# UNPACK #-} !(IORef Int)
817−#endif
818− }
819−type role SpiderTimelineEnv' phantom
820−
821−instance Eq (SpiderTimelineEnv x) where
822− _ == _ = True -- Since only one exists of each type
823−
824−instance GEq SpiderTimelineEnv where
825− a `geq` b = if _spiderTimeline_lock (unSTE a) == _spiderTimeline_lock (unSTE b)
826− then Just $ unsafeCoerce Refl -- This unsafeCoerce is safe because the same SpiderTimelineEnv can't have two different 'x' arguments
827− else Nothing
828−
829587data EventEnv x
830− = EventEnv { eventEnvAssignments :: !(IORef [SomeAssignment x]) -- Needed for Subscribe
588+ = EventEnv { eventEnvSpiderEnv :: !(SpiderEnv x)
589+ , eventEnvAssignments :: !(IORef [SomeAssignment x]) -- Needed for Subscribe
831590 , eventEnvHoldInits :: !(IORef [SomeHoldInit x]) -- Needed for Subscribe
832− , eventEnvDynInits :: !(IORef [SomeDynInit x])
833591 , eventEnvMergeUpdates :: !(IORef [SomeMergeUpdate x])
834592 , eventEnvMergeInits :: !(IORef [SomeMergeInit x]) -- Needed for Subscribe
835− , eventEnvClears :: !(IORef [Some Clear]) -- Needed for Subscribe
836− , eventEnvIntClears :: !(IORef [Some IntClear])
837− , eventEnvRootClears :: !(IORef [Some RootClear])
593+ , eventEnvClears :: !(IORef [SomeClear]) -- Needed for Subscribe
594+ , eventEnvRootClears :: !(IORef [SomeRootClear])
838595 , eventEnvCurrentHeight :: !(IORef Height) -- Needed for Subscribe
839596 , eventEnvResetCoincidences :: !(IORef [SomeResetCoincidence x]) -- Needed for Subscribe
840− , eventEnvDelayedMerges :: !(IORef (IntMap [EventM x ()]))
597+ , eventEnvDelayedMerges :: !(IORef (IntMap [DelayedMerge x]))
841598 }
842599
843600{-# INLINE runEventM #-}
844−runEventM :: EventM x a -> IO a
845−runEventM = unEventM
846−
847−asksEventEnv :: forall x a. HasSpiderTimeline x => (EventEnv x -> a) -> EventM x a
848−asksEventEnv f = return $ f $ _spiderTimeline_eventEnv (unSTE (spiderTimeline :: SpiderTimelineEnv x))
601+runEventM :: EventM x a -> EventEnv x -> IO a
602+runEventM = runReaderT . unEventM
849603
850604class MonadIO m => Defer a m where
851605 getDeferralQueue :: m (IORef [a])
@@ -856,98 +610,91 @@ defer a = do
856610 q <- getDeferralQueue
857611 liftIO $ modifyIORef' q (a:)
858612
859−instance HasSpiderTimeline x => Defer (SomeAssignment x) (EventM x) where
860− {-# INLINE getDeferralQueue #-}
861− getDeferralQueue = asksEventEnv eventEnvAssignments
862−
863−instance HasSpiderTimeline x => Defer (SomeHoldInit x) (EventM x) where
613+instance Defer (SomeAssignment x) (EventM x) where
864614 {-# INLINE getDeferralQueue #-}
865− getDeferralQueue = asksEventEnv eventEnvHoldInits
615+ getDeferralQueue = EventM $ asks eventEnvAssignments
866616
867−instance HasSpiderTimeline x => Defer (SomeDynInit x) (EventM x) where
617+instance Defer (SomeHoldInit x) (EventM x) where
868618 {-# INLINE getDeferralQueue #-}
869− getDeferralQueue = asksEventEnv eventEnvDynInits
619+ getDeferralQueue = EventM $ asks eventEnvHoldInits
870620
871621instance Defer (SomeHoldInit x) (BehaviorM x) where
872622 {-# INLINE getDeferralQueue #-}
873623 getDeferralQueue = BehaviorM $ asks snd
874624
875−instance HasSpiderTimeline x => Defer (SomeMergeUpdate x) (EventM x) where
625+instance Defer (SomeMergeUpdate x) (EventM x) where
876626 {-# INLINE getDeferralQueue #-}
877− getDeferralQueue = asksEventEnv eventEnvMergeUpdates
627+ getDeferralQueue = EventM $ asks eventEnvMergeUpdates
878628
879−instance HasSpiderTimeline x => Defer (SomeMergeInit x) (EventM x) where
629+instance Defer (SomeMergeInit x) (EventM x) where
880630 {-# INLINE getDeferralQueue #-}
881− getDeferralQueue = asksEventEnv eventEnvMergeInits
631+ getDeferralQueue = EventM $ asks eventEnvMergeInits
882632
883−class HasSpiderTimeline x => HasCurrentHeight x m | m -> x where
633+class HasCurrentHeight x m | m -> x where
884634 getCurrentHeight :: m Height
885− scheduleMerge :: Height -> EventM x () -> m ()
635+ scheduleMerge :: Height -> MergeSubscribed x a -> m ()
886636
887−instance HasSpiderTimeline x => HasCurrentHeight x (EventM x) where
637+instance HasCurrentHeight x (EventM x) where
888638 {-# INLINE getCurrentHeight #-}
889− getCurrentHeight = do
890− heightRef <- asksEventEnv eventEnvCurrentHeight
639+ getCurrentHeight = EventM $ do
640+ heightRef <- asks eventEnvCurrentHeight
891641 liftIO $ readIORef heightRef
892642 {-# INLINE scheduleMerge #-}
893− scheduleMerge height subscribed = do
894− delayedRef <- asksEventEnv eventEnvDelayedMerges
895− liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) (unHeight height) [subscribed]
643+ scheduleMerge height subscribed = EventM $ do
644+ delayedRef <- asks eventEnvDelayedMerges
645+ liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) (unHeight height) [DelayedMerge subscribed]
896646
897−class HasSpiderTimeline x where
898− -- | Retrieve the current SpiderTimelineEnv
899− spiderTimeline :: SpiderTimelineEnv x
647+class HasSpiderEnv x m | m -> x where
648+ -- | Retrieve the current SpiderEnv
649+ askSpiderEnv :: m (SpiderEnv x)
900650
901−instance HasSpiderTimeline Global where
902− spiderTimeline = globalSpiderTimelineEnv
651+instance HasSpiderEnv x (EventM x) where
652+ {-# INLINE askSpiderEnv #-}
653+ askSpiderEnv = EventM $ asks eventEnvSpiderEnv
903654
904−putCurrentHeight :: HasSpiderTimeline x => Height -> EventM x ()
905−putCurrentHeight h = do
906− heightRef <- asksEventEnv eventEnvCurrentHeight
655+instance HasSpiderEnv x (SpiderHost x) where
656+ {-# INLINE askSpiderEnv #-}
657+ askSpiderEnv = SpiderHost ask
658+
659+putCurrentHeight :: Height -> EventM x ()
660+putCurrentHeight h = EventM $ do
661+ heightRef <- asks eventEnvCurrentHeight
907662 liftIO $ writeIORef heightRef $! h
908663
909−instance HasSpiderTimeline x => Defer (Some Clear) (EventM x) where
664+instance Defer SomeClear (EventM x) where
910665 {-# INLINE getDeferralQueue #-}
911− getDeferralQueue = asksEventEnv eventEnvClears
666+ getDeferralQueue = EventM $ asks eventEnvClears
912667
913668{-# INLINE scheduleClear #-}
914−scheduleClear :: Defer (Some Clear) m => IORef (Maybe a) -> m ()
915−scheduleClear r = defer $ Some $ Clear r
916−
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
669+scheduleClear :: Defer SomeClear m => IORef (Maybe a) -> m ()
670+scheduleClear r = defer $ SomeClear r
924671
925−instance HasSpiderTimeline x => Defer (Some RootClear) (EventM x) where
672+instance Defer SomeRootClear (EventM x) where
926673 {-# INLINE getDeferralQueue #-}
927− getDeferralQueue = asksEventEnv eventEnvRootClears
674+ getDeferralQueue = EventM $ asks eventEnvRootClears
928675
929676{-# INLINE scheduleRootClear #-}
930−scheduleRootClear :: Defer (Some RootClear) m => IORef (DMap k Identity) -> m ()
931−scheduleRootClear r = defer $ Some $ RootClear r
677+scheduleRootClear :: Defer SomeRootClear m => IORef (DMap k Identity) -> m ()
678+scheduleRootClear r = defer $ SomeRootClear r
932679
933−instance HasSpiderTimeline x => Defer (SomeResetCoincidence x) (EventM x) where
680+instance Defer (SomeResetCoincidence x) (EventM x) where
934681 {-# INLINE getDeferralQueue #-}
935− getDeferralQueue = asksEventEnv eventEnvResetCoincidences
682+ getDeferralQueue = EventM $ asks eventEnvResetCoincidences
936683
937684-- Note: hold cannot examine its event until after the phase is over
938−{-# INLINE [1] hold #-}
939−hold :: (Patch p, Defer (SomeHoldInit x) m) => PatchTarget p -> Event x p -> m (Hold x p)
685+{-# SPECIALIZE hold :: R.Patch p => a -> Event x (p a) -> EventM x (Hold x p a) #-}
686+{-# SPECIALIZE hold :: R.Patch p => a -> Event x (p a) -> ComputeM x (Hold x p a) #-}
687+hold :: (R.Patch p, Defer (SomeHoldInit x) m) => a -> Event x (p a) -> m (Hold x p a)
940688hold v0 e = do
941689 valRef <- liftIO $ newIORef v0
942690 invsRef <- liftIO $ newIORef []
943− parentRef <- liftIO $ newIORef Nothing
691+ parentRef <- liftIO $ newIORef $ Left e
944692#ifdef DEBUG_NODEIDS
945693 nodeId <- liftIO newNodeId
946694#endif
947695 let h = Hold
948696 { holdValue = valRef
949697 , holdInvalidators = invsRef
950− , holdEvent = e
951698 , holdParent = parentRef
952699#ifdef DEBUG_NODEIDS
953700 , holdNodeId = nodeId
@@ -957,35 +704,35 @@ hold v0 e = do
957704 return h
958705
959706{-# INLINE getHoldEventSubscription #-}
960−getHoldEventSubscription :: forall p x. (HasSpiderTimeline x, Patch p) => Hold x p -> EventM x (EventSubscription x)
707+getHoldEventSubscription :: forall m p a x. (Defer (SomeAssignment x) m, Defer (SomeHoldInit x) m, Defer SomeClear m, R.Patch p, HasCurrentHeight x m, Defer (SomeMergeInit x) m, Defer (SomeResetCoincidence x) m, HasSpiderEnv x m, m ~ EventM x) => Hold x p a -> m (EventSubscription x (p a))
961708getHoldEventSubscription h = do
962709 ep <- liftIO $ readIORef $ holdParent h
963710 case ep of
964− Just subd -> return subd
965− Nothing -> do
966− let e = holdEvent h
711+ Right subd -> return subd
712+ Left e -> do
967713 subscriptionRef <- liftIO $ newIORef $ error "getHoldEventSubscription: subdRef uninitialized"
968− (subscription@(EventSubscription _ _), occ) <- subscribeAndRead e =<< liftIO (newSubscriberHold h)
714+ subscription@(EventSubscription _ subd) <- subscribe e =<< liftIO (newSubscriberHold h)
969715 liftIO $ writeIORef subscriptionRef $! subscription
716+ occ <- liftIO $ readEventSubscribed subd
970717 case occ of
971718 Nothing -> return ()
972719 Just o -> do
973720 old <- liftIO $ readIORef $ holdValue h
974− case apply o old of
721+ case R.apply o old of
975722 Nothing -> return ()
976723 Just new -> do
977724 -- Need to evaluate these so that we don't retain the Hold itself
978725 v <- liftIO $ evaluate $ holdValue h
979726 i <- liftIO $ evaluate $ holdInvalidators h
980727 defer $ SomeAssignment v i new
981− liftIO $ writeIORef (holdParent h) $ Just subscription
728+ liftIO $ writeIORef (holdParent h) $ Right subscription
982729 return subscription
983730
984731type BehaviorEnv x = (Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]), IORef [SomeHoldInit x])
985732
733+--type role BehaviorM representational
986734-- BehaviorM can sample behaviors
987−newtype BehaviorM x a = BehaviorM { unBehaviorM :: ReaderIO (BehaviorEnv x) a }
988− deriving (Functor, Applicative, MonadIO, MonadFix, MonadReader (BehaviorEnv x))
735+newtype BehaviorM x a = BehaviorM { unBehaviorM :: ReaderT (BehaviorEnv x) IO a } deriving (Functor, Applicative, MonadIO, MonadFix)
989736
990737instance Monad (BehaviorM x) where
991738 {-# INLINE (>>=) #-}
@@ -994,16 +741,14 @@ instance Monad (BehaviorM x) where
994741 BehaviorM x >> BehaviorM y = BehaviorM $ x >> y
995742 {-# INLINE return #-}
996743 return x = BehaviorM $ return x
997−#if !MIN_VERSION_base(4,13,0)
998744 {-# INLINE fail #-}
999745 fail s = BehaviorM $ fail s
1000−#endif
1001746
1002747data BehaviorSubscribed x a
1003− = forall p. BehaviorSubscribedHold (Hold x p)
748+ = forall p. BehaviorSubscribedHold (Hold x p a)
1004749 | BehaviorSubscribedPull (PullSubscribed x a)
1005750
1006−newtype SomeBehaviorSubscribed x = SomeBehaviorSubscribed (Some (BehaviorSubscribed x))
751+data SomeBehaviorSubscribed x = forall a. SomeBehaviorSubscribed (BehaviorSubscribed x a)
1007752
1008753--type role PullSubscribed representational
1009754data PullSubscribed x a
@@ -1038,33 +783,55 @@ data RootSubscribed x a = forall k. GCompare k => RootSubscribed
1038783#endif
1039784 }
1040785
1041−data Root x k
786+data Root x (k :: * -> *)
1042787 = Root { rootOccurrence :: !(IORef (DMap k Identity)) -- The currently-firing occurrence of this event
1043788 , rootSubscribed :: !(IORef (DMap k (RootSubscribed x)))
1044789 , rootInit :: !(forall a. k a -> RootTrigger x a -> IO (IO ()))
1045790 }
1046791
1047−data SomeHoldInit x = forall p. Patch p => SomeHoldInit !(Hold x p)
792+data SomeHoldInit x = forall p a. R.Patch p => SomeHoldInit !(Hold x p a)
1048793
1049−data SomeDynInit x = forall p. Patch p => SomeDynInit !(Dyn x p)
794+data SomeMergeUpdate x = forall k. GCompare k => SomeMergeUpdate (R.PatchDMap (DMap k (Event x))) (MergeSubscribed x k)
1050795
1051−data SomeMergeUpdate x = SomeMergeUpdate
1052− { _someMergeUpdate_update :: !(EventM x [EventSubscription x])
1053− , _someMergeUpdate_invalidateHeight :: !(IO ())
1054− , _someMergeUpdate_recalculateHeight :: !(IO ())
1055− }
796+data SomeMergeInit x = forall k. GCompare k => SomeMergeInit !(MergeSubscribed x k) !(Event x (R.PatchDMap (DMap k (Event x))))
1056797
1057−newtype SomeMergeInit x = SomeMergeInit { unSomeMergeInit :: EventM x () }
798+data SomeEventSubscription x = forall a. SomeEventSubscription (EventSubscription x a)
1058799
1059800-- EventM can do everything BehaviorM can, plus create holds
1060−newtype EventM x a = EventM { unEventM :: IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException)
801+newtype EventM x (a :: *) = EventM { unEventM :: ReaderT (EventEnv x) IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException) -- The environment should be Nothing if we are not in a frame, and Just if we are - in which case it is a list of assignments to be done after the frame is over
802+
803+data PushSubscribed x a b
804+ = PushSubscribed { pushSubscribedCachedSubscribed :: !(IORef (Maybe (PushSubscribed x a b)))
805+ , pushSubscribedOccurrence :: !(IORef (Maybe b)) -- If the current height is less than our height, this should always be Nothing; during our height, this will get filled in at some point, always before our children are notified; after our height, this will be filled in with the correct value (Nothing if we are not firing, Just if we are)
806+ , pushSubscribedHeight :: !(IORef Height)
807+ , pushSubscribedSubscribers :: !(WeakBag (Subscriber x b))
808+ , pushSubscribedSelf :: !(Subscriber x a) -- Hold this in memory to ensure our WeakReferences don't die --TODO: Probably unneeded now
809+ , pushSubscribedWeakSelf :: !(IORef (Weak (PushSubscribed x a b)))
810+ , pushSubscribedParent :: !(EventSubscription x a)
811+#ifdef DEBUG_NODEIDS
812+ , pushSubscribedNodeId :: Int
813+#endif
814+ }
1061815
1062−newtype MergeSubscribedParent x a = MergeSubscribedParent { unMergeSubscribedParent :: EventSubscription x }
816+newtype ComputeM x a = ComputeM (ReaderT (IORef [SomeHoldInit x]) IO a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
1063817
1064−data MergeSubscribedParentWithMove x k a = MergeSubscribedParentWithMove
1065− { _mergeSubscribedParentWithMove_subscription :: !(EventSubscription x)
1066− , _mergeSubscribedParentWithMove_key :: !(IORef (k a))
1067− }
818+instance Defer (SomeHoldInit x) (ComputeM x) where
819+ getDeferralQueue = ComputeM ask
820+
821+{-# SPECIALIZE runComputeM :: ComputeM x a -> EventM x a #-}
822+runComputeM :: Defer (SomeHoldInit x) m => ComputeM x a -> m a
823+runComputeM (ComputeM a) = liftIO . runReaderT a =<< getDeferralQueue
824+
825+data Push x a b
826+ = Push { pushCompute :: !(a -> ComputeM x (Maybe b)) -- Compute the current firing value; assumes that its parent has been computed --TODO: This only uses Defer SomeHoldInit EventM; perhaps only the hold init queue should be passed in (also, perhaps those hold inits can be accelerated - can there be a loop we would need to worry about?)
827+ , pushParent :: !(Event x a)
828+ , pushSubscribed :: !(IORef (Maybe (PushSubscribed x a b))) --TODO: Can we replace this with an unsafePerformIO thunk?
829+ }
830+
831+data MergeSubscribedParent (x :: *) k a = MergeSubscribedParent !(EventSubscription x a) !(Subscriber x a)
832+
833+mergeSubscribedParentSubscription :: MergeSubscribedParent x k a -> EventSubscription x a
834+mergeSubscribedParentSubscription (MergeSubscribedParent es _) = es
1068835
1069836data HeightBag = HeightBag
1070837 { _heightBag_size :: {-# UNPACK #-} !Int
@@ -1082,8 +849,7 @@ heightBagFromList :: [Height] -> HeightBag
1082849heightBagFromList heights = heightBagVerify $ foldl' (flip heightBagAdd) heightBagEmpty heights
1083850
1084851heightBagAdd :: Height -> HeightBag -> HeightBag
1085−heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $
1086− IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
852+heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
1087853
1088854heightBagRemove :: Height -> HeightBag -> HeightBag
1089855heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.lookup h c of
@@ -1092,13 +858,6 @@ heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.loo
1092858 0 -> IntMap.delete h c
1093859 _ -> IntMap.insert h (pred old) c
1094860
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−
1102861heightBagMax :: HeightBag -> Height
1103862heightBagMax (HeightBag _ c) = case IntMap.maxViewWithKey c of
1104863 Just ((h, _), _) -> Height h
@@ -1116,25 +875,45 @@ heightBagVerify b@(HeightBag s c) = if
1116875heightBagVerify = id
1117876#endif
1118877
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)))
878+data MergeSubscribed x k
879+ = MergeSubscribed { mergeSubscribedCachedSubscribed :: !(IORef (Maybe (MergeSubscribed x k))) -- From the original merge
880+ , mergeSubscribedOccurrence :: !(IORef (Maybe (DMap k Identity)))
881+ , mergeSubscribedAccum :: !(IORef (DMap k Identity)) -- This will accumulate occurrences until our height is reached, at which point it will be transferred to mergeSubscribedOccurrence
882+ , mergeSubscribedHeight :: !(IORef Height)
883+ , mergeSubscribedHeightBag :: !(IORef HeightBag)
884+ , mergeSubscribedSubscribers :: !(WeakBag (Subscriber x (DMap k Identity)))
885+ , mergeSubscribedChange :: !(IORef (Subscriber x (R.PatchDMap (DMap k (Event x))), EventSubscribed x (R.PatchDMap (DMap k (Event x)))))
886+ , mergeSubscribedParents :: !(IORef (DMap k (MergeSubscribedParent x k)))
887+ , mergeSubscribedWeakSelf :: !(IORef (Weak (MergeSubscribed x k)))
888+#ifdef DEBUG_NODEIDS
889+ , mergeSubscribedNodeId :: Int
890+#endif
891+ }
892+
893+--TODO: DMap sucks; we should really write something better (with a functor for the value as well as the key)
894+data Merge x k
895+ = Merge { mergeParents :: !(Dynamic x R.PatchDMap (DMap k (Event x)))
896+ , mergeSubscribed :: !(IORef (Maybe (MergeSubscribed x k)))
897+ }
898+
899+data FanSubscribedChildren (x :: *) k a = FanSubscribedChildren
900+ { _fanSubscribedChildren_list :: !(WeakBag (Subscriber x a))
901+ , _fanSubscribedChildren_self :: {-# NOUNPACK #-} !(k a, FanSubscribed x k)
902+ , _fanSubscribedChildren_weakSelf :: !(IORef (Weak (k a, FanSubscribed x k)))
1123903 }
1124904
1125−data FanSubscribed x k v
1126− = FanSubscribed { fanSubscribedCachedSubscribed :: !(IORef (Maybe (FanSubscribed x k v)))
1127− , fanSubscribedOccurrence :: !(IORef (Maybe (DMap k v)))
1128− , fanSubscribedSubscribers :: !(IORef (DMap k (FanSubscribedChildren x k v))) -- This DMap should never be empty
1129− , fanSubscribedParent :: !(EventSubscription x)
905+data FanSubscribed (x :: *) k
906+ = FanSubscribed { fanSubscribedCachedSubscribed :: !(IORef (Maybe (FanSubscribed x k)))
907+ , fanSubscribedSubscribers :: !(IORef (DMap k (FanSubscribedChildren x k))) -- This DMap should never be empty
908+ , fanSubscribedParent :: !(EventSubscription x (DMap k Identity))
1130909#ifdef DEBUG_NODEIDS
1131910 , fanSubscribedNodeId :: Int
1132911#endif
1133912 }
1134913
1135−data Fan x k v
1136− = Fan { fanParent :: !(Event x (DMap k v))
1137− , fanSubscribed :: !(IORef (Maybe (FanSubscribed x k v)))
914+data Fan x k
915+ = Fan { fanParent :: !(Event x (DMap k Identity))
916+ , fanSubscribed :: !(IORef (Maybe (FanSubscribed x k)))
1138917 }
1139918
1140919data SwitchSubscribed x a
@@ -1146,7 +925,7 @@ data SwitchSubscribed x a
1146925 , switchSubscribedOwnWeakInvalidator :: !(IORef (Weak (Invalidator x)))
1147926 , switchSubscribedBehaviorParents :: !(IORef [SomeBehaviorSubscribed x])
1148927 , switchSubscribedParent :: !(Behavior x (Event x a))
1149− , switchSubscribedCurrentParent :: !(IORef (EventSubscription x))
928+ , switchSubscribedCurrentParent :: !(IORef (EventSubscription x a))
1150929 , switchSubscribedWeakSelf :: !(IORef (Weak (SwitchSubscribed x a)))
1151930#ifdef DEBUG_NODEIDS
1152931 , switchSubscribedNodeId :: Int
@@ -1158,17 +937,15 @@ data Switch x a
1158937 , switchSubscribed :: !(IORef (Maybe (SwitchSubscribed x a)))
1159938 }
1160939
1161−#ifdef USE_TEMPLATE_HASKELL
1162940{-# ANN CoincidenceSubscribed "HLint: ignore Redundant bracket" #-}
1163−#endif
1164941data CoincidenceSubscribed x a
1165942 = CoincidenceSubscribed { coincidenceSubscribedCachedSubscribed :: !(IORef (Maybe (CoincidenceSubscribed x a)))
1166943 , coincidenceSubscribedOccurrence :: !(IORef (Maybe a))
1167944 , coincidenceSubscribedSubscribers :: !(WeakBag (Subscriber x a))
1168945 , coincidenceSubscribedHeight :: !(IORef Height)
1169946 , coincidenceSubscribedOuter :: {-# NOUNPACK #-} (Subscriber x (Event x a))
1170− , coincidenceSubscribedOuterParent :: !(EventSubscription x)
1171− , coincidenceSubscribedInnerParent :: !(IORef (Maybe (EventSubscribed x)))
947+ , coincidenceSubscribedOuterParent :: !(EventSubscription x (Event x a))
948+ , coincidenceSubscribedInnerParent :: !(IORef (Maybe (EventSubscribed x a)))
1172949 , coincidenceSubscribedWeakSelf :: !(IORef (Weak (CoincidenceSubscribed x a)))
1173950#ifdef DEBUG_NODEIDS
1174951 , coincidenceSubscribedNodeId :: Int
@@ -1188,111 +965,152 @@ newInvalidatorSwitch subd = return $! InvalidatorSwitch subd
1188965newInvalidatorPull :: Pull x a -> IO (Invalidator x)
1189966newInvalidatorPull p = return $! InvalidatorPull p
1190967
1191−instance HasSpiderTimeline x => Filterable (Event x) where
1192− mapMaybe f = push $ return . f
1193−
1194−instance HasSpiderTimeline x => Align (Event x) where
968+data Dynamic x p a
969+ = DynamicHold !(Hold x p a)
970+ | p ~ Identity => DynamicHoldIdentity !(Hold x Identity a)
971+ | DynamicConst !a
972+ | DynamicDyn !(Dyn x p a)
973+ | p ~ Identity => DynamicDynIdentity !(Dyn x Identity a)
974+
975+{-# INLINE current #-}
976+current :: R.Patch p => Dynamic x p a -> Behavior x a
977+current = \case
978+ DynamicHold h -> BehaviorHold h
979+ DynamicHoldIdentity h -> BehaviorHoldIdentity h
980+ DynamicConst a -> BehaviorConst a
981+ DynamicDyn d -> BehaviorDyn d
982+ DynamicDynIdentity d -> BehaviorDynIdentity d
983+
984+--TODO: If you only need updated, not current, can we avoid actually constructing the Hold?
985+{-# INLINE updated #-}
986+updated :: R.Patch p => Dynamic x p a -> Event x (p a)
987+updated = \case
988+ DynamicHold h -> eventHold h
989+ DynamicHoldIdentity h -> eventHoldIdentity h
990+ DynamicConst _ -> eventNever
991+ DynamicDyn d -> eventDyn d
992+ DynamicDynIdentity d -> eventDynIdentity d
993+
994+newMapDyn :: (a -> b) -> Dynamic x Identity a -> Dynamic x Identity b
995+newMapDyn f d = DynamicDynIdentity $ unsafeDyn (fmap f $ readBehaviorTracked $ current d) (Identity . f . runIdentity <$> updated d)
996+
997+instance Functor (Dynamic x Identity) where
998+ fmap = newMapDyn
999+
1000+instance Applicative (Dynamic x Identity) where
1001+ pure = DynamicConst
1002+ (<*>) = zipDynWith ($)
1003+ _ *> b = b
1004+ a <* _ = a
1005+
1006+instance R.FunctorMaybe (Event x) where
1007+ fmapMaybe f = push $ return . f
1008+
1009+instance Align (Event x) where
11951010 nil = eventNever
1196−#if MIN_VERSION_these(0, 8, 0)
1197−instance HasSpiderTimeline x => Semialign (Event x) where
1198−#endif
1199− align ea eb = mapMaybe dmapToThese $ mergeG coerce $ dynamicConst $
1200− DMap.fromDistinctAscList [LeftTag :=> ea, RightTag :=> eb]
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)
1212−
1213−newtype Dyn (x :: Type) p = Dyn { unDyn :: IORef (DynType x p) }
1214−
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)
1011+ align ea eb = R.fmapMaybe R.dmapToThese $ merge $ DynamicConst $ DMap.fromList [R.LeftTag :=> ea, R.RightTag :=> eb]
12171012
12181013--TODO: Avoid the duplication between this and R.zipDynWith
1219−zipDynWith :: HasSpiderTimeline x => (a -> b -> c) -> DynamicS x (Identity a) -> DynamicS x (Identity b) -> DynamicS x (Identity c)
1014+zipDynWith :: (a -> b -> c) -> Dynamic x Identity a -> Dynamic x Identity b -> Dynamic x Identity c
12201015zipDynWith f da db =
1221− let eab = align (dynamicUpdated da) (dynamicUpdated db)
1016+ let eab = align (updated da) (updated db)
12221017 ec = flip push eab $ \o -> do
12231018 (a, b) <- case o of
12241019 This (Identity a) -> do
1225− b <- readBehaviorUntracked $ dynamicCurrent db
1020+ b <- readBehaviorUntracked $ current db
12261021 return (a, b)
12271022 That (Identity b) -> do
1228− a <- readBehaviorUntracked $ dynamicCurrent da
1023+ a <- readBehaviorUntracked $ current da
12291024 return (a, b)
12301025 These (Identity a) (Identity b) -> return (a, b)
12311026 return $ Just $ Identity $ f a b
1232− in dynamicDynIdentity $ unsafeBuildDynamic (f <$> readBehaviorUntracked (dynamicCurrent da) <*> readBehaviorUntracked (dynamicCurrent db)) ec
1027+ in DynamicDynIdentity $ unsafeDyn (f <$> readBehaviorUntracked (current da) <*> readBehaviorUntracked (current db)) ec
1028+
1029+instance Monad (Dynamic x Identity) where
1030+ {-# INLINE return #-}
1031+ return = pure
1032+ {-# INLINE (>>=) #-}
1033+ x >>= f = DynamicDynIdentity $ newJoinDyn $ newMapDyn f x --TODO: (>>), fail
1034+ {-# INLINE (>>) #-}
1035+ _ >> y = y
1036+ {-# INLINE fail #-}
1037+ fail _ = error "Dynamic does not support 'fail'"
12331038
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
1039+newtype Dyn x p a = Dyn { unDyn :: IORef (Either (BehaviorM x a, Event x (p a)) (Hold x p a)) }
12401040
1241−unsafeBuildDynamic :: BehaviorM x (PatchTarget p) -> Event x p -> Dyn x p
1242−unsafeBuildDynamic readV0 v' =
1243− Dyn $ unsafePerformIO $ newIORef $ UnsafeDyn (readV0, v')
1041+unsafeDyn :: BehaviorM x a -> Event x (p a) -> Dyn x p a
1042+unsafeDyn readV0 v' = Dyn $ unsafeNewIORef x $ Left x
1043+ where x = (readV0, v')
1044+
1045+newJoinDyn :: Dynamic x Identity (Dynamic x Identity a) -> Dyn x Identity a
1046+newJoinDyn d =
1047+ let readV0 = readBehaviorTracked . current =<< readBehaviorTracked (current d)
1048+ eOuter = push (fmap (Just . Identity) . readBehaviorUntracked . current . runIdentity) $ updated d
1049+ eInner = switch $ updated <$> current d
1050+ eBoth = coincidence $ updated . runIdentity <$> updated d
1051+ v' = unSpiderEvent $ R.leftmost $ map SpiderEvent [eBoth, eOuter, eInner]
1052+ in unsafeDyn readV0 v'
1053+
1054+--type role Behavior representational
1055+data Behavior x a
1056+ = forall p. BehaviorHold !(Hold x p a)
1057+ | BehaviorHoldIdentity !(Hold x Identity a)
1058+ | BehaviorConst !a
1059+ | BehaviorPull !(Pull x a)
1060+ | BehaviorDynIdentity !(Dyn x Identity a)
1061+ | forall p. R.Patch p => BehaviorDyn !(Dyn x p a)
12441062
12451063-- ResultM can read behaviors and events
12461064type ResultM = EventM
12471065
1248−instance HasSpiderTimeline x => Functor (Event x) where
1066+{-# NOINLINE unsafeNewIORef #-}
1067+unsafeNewIORef :: a -> b -> IORef b
1068+unsafeNewIORef _ b = unsafePerformIO $ newIORef b
1069+
1070+instance Functor (Event x) where
12491071 fmap f = push $ return . Just . f
12501072
12511073instance Functor (Behavior x) where
12521074 fmap f = pull . fmap f . readBehaviorTracked
12531075
1254−{-# INLINE push #-}
1255−push :: HasSpiderTimeline x => (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
1256−push f e = cacheEvent (pushCheap f e)
1076+{-# NOINLINE push #-} --TODO: If this is helpful, we can get rid of the unsafeNewIORef and use unsafePerformIO directly
1077+push :: (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
1078+push f e = eventPush $ Push
1079+ { pushCompute = f
1080+ , pushParent = e
1081+ , pushSubscribed = unsafeNewIORef (f, e) Nothing --TODO: Does the use of the tuple here create unnecessary overhead?
1082+ }
1083+-- DISABLED: {- RULES "push/push" forall f g e. push f (push g e) = push (maybe (return Nothing) f <=< g) e #-}
12571084
1258−{-# INLINABLE pull #-}
1085+{-# NOINLINE pull #-}
12591086pull :: BehaviorM x a -> Behavior x a
1260−pull a = unsafePerformIO $ do
1261− ref <- newIORef Nothing
1087+pull a = BehaviorPull $ Pull
1088+ { pullCompute = a
1089+ , pullValue = unsafeNewIORef a Nothing
12621090#ifdef DEBUG_NODEIDS
1263− nid <- newNodeId
1091+ , pullNodeId = unsafeNodeId a
12641092#endif
1265− pure $ behaviorPull $ Pull
1266− { pullCompute = a
1267− , pullValue = ref
1268−#ifdef DEBUG_NODEIDS
1269− , pullNodeId = nid
1270−#endif
1271− }
1093+ }
12721094
1273−{-# INLINABLE switch #-}
1274−switch :: HasSpiderTimeline x => Behavior x (Event x a) -> Event x a
1275−switch a = unsafePerformIO $ do
1276− ref <- newIORef Nothing
1277− pure $ eventSwitch $ Switch
1278− { switchParent = a
1279− , switchSubscribed = ref
1280− }
1095+{-# NOINLINE switch #-}
1096+switch :: Behavior x (Event x a) -> Event x a
1097+switch a = eventSwitch $ Switch
1098+ { switchParent = a
1099+ , switchSubscribed = unsafeNewIORef a Nothing
1100+ }
12811101
1282−coincidence :: HasSpiderTimeline x => Event x (Event x a) -> Event x a
1283−coincidence a = unsafePerformIO $ do
1284− ref <- newIORef Nothing
1285− pure $ eventCoincidence $ Coincidence
1286− { coincidenceParent = a
1287− , coincidenceSubscribed = ref
1288− }
1102+coincidence :: Event x (Event x a) -> Event x a
1103+coincidence a = eventCoincidence $ Coincidence
1104+ { coincidenceParent = a
1105+ , coincidenceSubscribed = unsafeNewIORef a Nothing
1106+ }
12891107
12901108-- Propagate the given event occurrence; before cleaning up, run the given action, which may read the state of events and behaviors
1291−run :: forall x b. HasSpiderTimeline x => [DSum (RootTrigger x) Identity] -> ResultM x b -> SpiderHost x b
1109+run :: [DSum (RootTrigger x) Identity] -> ResultM x b -> SpiderHost x b
12921110run roots after = do
1293− tracePropagate (Proxy :: Proxy x) $ "Running an event frame with " <> show (length roots) <> " events"
1294− let t = spiderTimeline :: SpiderTimelineEnv x
1295− result <- SpiderHost $ withMVar (_spiderTimeline_lock (unSTE t)) $ \_ -> unSpiderHost $ runFrame $ do
1111+ tracePropagate $ "Running an event frame with " <> show (length roots) <> " events"
1112+ spiderEnv <- SpiderHost ask
1113+ result <- SpiderHost $ lift $ withMVar (_spiderEnv_lock spiderEnv) $ \_ -> flip runReaderT spiderEnv $ unSpiderHost $ runFrame $ do
12961114 rootsToPropagate <- forM roots $ \r@(RootTrigger (_, occRef, k) :=> a) -> do
12971115 occBefore <- liftIO $ do
12981116 occBefore <- readIORef occRef
@@ -1304,40 +1122,43 @@ run roots after = do
13041122 else return Nothing
13051123 forM_ (catMaybes rootsToPropagate) $ \(RootTrigger (subscribersRef, _, _) :=> Identity a) -> do
13061124 propagate a subscribersRef
1307− delayedRef <- asksEventEnv eventEnvDelayedMerges
1125+ delayedRef <- EventM $ asks eventEnvDelayedMerges
13081126 let go = do
13091127 delayed <- liftIO $ readIORef delayedRef
13101128 case IntMap.minViewWithKey delayed of
13111129 Nothing -> return ()
13121130 Just ((currentHeight, cur), future) -> do
1313− tracePropagate (Proxy :: Proxy x) $ "Running height " ++ show currentHeight
1131+ tracePropagate $ "Running height " ++ show currentHeight
13141132 putCurrentHeight $ Height currentHeight
13151133 liftIO $ writeIORef delayedRef $! future
1316− sequence_ cur
1134+ forM_ cur $ \d -> case d of
1135+ DelayedMerge subscribed -> do
1136+ height <- liftIO $ readIORef $ mergeSubscribedHeight subscribed
1137+ case height `compare` Height currentHeight of
1138+ LT -> error "Somehow a merge's height has been decreased after it was scheduled"
1139+ GT -> scheduleMerge height subscribed -- The height has been increased (by a coincidence event; TODO: is this the only way?)
1140+ EQ -> do
1141+ m <- liftIO $ readIORef $ mergeSubscribedAccum subscribed
1142+ liftIO $ writeIORef (mergeSubscribedAccum subscribed) $! DMap.empty
1143+ --TODO: Assert that m is not empty
1144+ liftIO $ writeIORef (mergeSubscribedOccurrence subscribed) $ Just m
1145+ scheduleClear $ mergeSubscribedOccurrence subscribed
1146+ propagate m $ mergeSubscribedSubscribers subscribed
13171147 go
13181148 go
13191149 putCurrentHeight maxBound
13201150 after
1321− tracePropagate (Proxy :: Proxy x) "Done running an event frame"
1151+ tracePropagate "Done running an event frame"
13221152 return result
13231153
1324−scheduleMerge' :: HasSpiderTimeline x => Height -> IORef Height -> EventM x () -> EventM x ()
1325−scheduleMerge' initialHeight heightRef a = scheduleMerge initialHeight $ do
1326− height <- liftIO $ readIORef heightRef
1327− currentHeight <- getCurrentHeight
1328− case height `compare` currentHeight of
1329− LT -> error "Somehow a merge's height has been decreased after it was scheduled"
1330− GT -> scheduleMerge' height heightRef a -- The height has been increased (by a coincidence event; TODO: is this the only way?)
1331− EQ -> a
1154+data SomeClear = forall a. SomeClear (IORef (Maybe a))
13321155
1333−newtype Clear a = Clear (IORef (Maybe a))
1334−
1335−newtype IntClear a = IntClear (IORef (IntMap a))
1336−
1337−newtype RootClear k = RootClear (IORef (DMap k Identity))
1156+data SomeRootClear = forall k. SomeRootClear (IORef (DMap k Identity))
13381157
13391158data SomeAssignment x = forall a. SomeAssignment {-# UNPACK #-} !(IORef a) {-# UNPACK #-} !(IORef [Weak (Invalidator x)]) a
13401159
1160+data DelayedMerge x = forall k. DelayedMerge (MergeSubscribed x k)
1161+
13411162debugFinalize :: Bool
13421163debugFinalize = False
13431164
@@ -1346,106 +1167,54 @@ mkWeakPtrWithDebug x debugNote = do
13461167 x' <- evaluate x
13471168 mkWeakPtr x' $
13481169 if debugFinalize
1349− then Just $ debugStrLn $ "finalizing: " ++ debugNote
1170+ then Just $ putStrLn $ "finalizing: " ++ debugNote
13501171 else Nothing
13511172
13521173type WeakList a = [Weak a]
13531174
1354−type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
1355−
1356−
1357−
1358−
1359−#ifdef DEBUG
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−
13811175{-# 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
1176+#ifdef DEBUG
1177+withIncreasedDepth :: CanTrace x m => m a -> m a
1178+withIncreasedDepth a = do
1179+ spiderEnv <- askSpiderEnv
1180+ liftIO $ modifyIORef' (_spiderEnv_depth spiderEnv) succ
13851181 result <- a
1386− liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) pred
1182+ liftIO $ modifyIORef' (_spiderEnv_depth spiderEnv) pred
13871183 return result
1388−
1389−{-# INLINE tracePropagate #-}
1390−tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1391−tracePropagate p = when debugPropagate . trace p
1392−
1393−{-# INLINE traceInvalidate #-}
1394−traceInvalidate :: String -> IO ()
1395−traceInvalidate = when debugInvalidate . liftIO . debugStrLn
1396−
1397−{-# INLINE traceInvalidateHeight #-}
1398−traceInvalidateHeight :: String -> IO ()
1399−traceInvalidateHeight = when debugInvalidateHeight . liftIO . debugStrLn
1400−
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
1408− message <- getMessage
1409− d <- liftIO $ readIORef $ _spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)
1410− liftIO $ debugStrLn $ replicate d ' ' <> message
1411−
14121184#else
1185+withIncreasedDepth :: m a -> m a
1186+withIncreasedDepth = id
1187+#endif
14131188
1414−{-# INLINE withIncreasedDepth #-}
1415−withIncreasedDepth :: proxy x -> m a -> m a
1416−withIncreasedDepth _ = id
1189+type CanTrace x m = (HasSpiderEnv x m, MonadIO m)
14171190
14181191{-# INLINE tracePropagate #-}
1419−tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1420−tracePropagate _ _ = return ()
1192+tracePropagate :: (CanTrace x m) => String -> m ()
1193+tracePropagate = traceWhen debugPropagate
1194+
1195+{-# INLINE traceSubscribe #-}
1196+traceSubscribe :: String -> IO ()
1197+traceSubscribe = when debugSubscribe . liftIO . putStrLn
14211198
14221199{-# INLINE traceInvalidate #-}
14231200traceInvalidate :: 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
1201+traceInvalidate = when debugInvalidate . liftIO . putStrLn
14371202
1203+{-# INLINE traceWhen #-}
1204+traceWhen :: (CanTrace x m) => Bool -> String -> m ()
1205+traceWhen b message = traceMWhen b $ return message
14381206
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−
1207+{-# INLINE traceMWhen #-}
1208+traceMWhen :: (CanTrace x m) => Bool -> m String -> m ()
1209+traceMWhen b getMessage = when b $ do
1210+ message <- getMessage
1211+#ifdef DEBUG
1212+ spiderEnv <- askSpiderEnv
1213+ d <- liftIO $ readIORef $ _spiderEnv_depth spiderEnv
1214+#else
1215+ let d = 0
14481216#endif
1217+ liftIO $ putStrLn $ replicate d ' ' <> message
14491218
14501219whoCreatedIORef :: IORef a -> IO [String]
14511220whoCreatedIORef (IORef a) = whoCreated $! a
@@ -1460,278 +1229,339 @@ groupByHead = \case
14601229 | otherwise -> (x, xs :| []) : l
14611230
14621231listsToForest :: Eq a => [[a]] -> Forest a
1463−listsToForest lists = buildForest <$> groupByHead (mapMaybe nonEmpty lists)
1464− where buildForest (a, lists') = Node a $ listsToForest $ toList lists'
1465−
1466−showStacks :: [[String]] -> String
1467−showStacks = drawForest . listsToForest . fmap (filterStack "Reflex.Spider.Internal")
1468−
1469−filterStack :: String -> [String] -> [String]
1470−#ifdef DEBUG_HIDE_INTERNALS
1471−filterStack prefix = filter (not . (prefix `isPrefixOf`))
1472−#else
1473−filterStack prefix = id
1474−#endif
1475−
1476−#ifdef DEBUG_CYCLES
1477−
1478−data EventLoopException = EventLoopException [[String]]
1479−instance Exception EventLoopException
1480−
1481−instance Show EventLoopException where
1482− show (EventLoopException stacks) = "causality loop detected:\n" <> if null stacks
1483− then "no location information, compile with profiling enabled for stack tree"
1484− else showStacks stacks
1485−
1486−#else
1487−
1488−data EventLoopException = EventLoopException
1489−instance Exception EventLoopException
1490−
1491−instance Show EventLoopException where
1492− show EventLoopException = "causality loop detected: \n" <>
1493− "compile reflex with flag 'debug-cycles' and compile with profiling enabled for stack tree"
1494−
1495−#endif
1496−
1232+listsToForest l = fmap (\(a, l') -> Node a $ listsToForest $ toList l') $ groupByHead $ catMaybes $ fmap nonEmpty l
14971233
14981234{-# INLINE propagateSubscriberHold #-}
1499−propagateSubscriberHold :: forall x p. (HasSpiderTimeline x, Patch p) => Hold x p -> p -> EventM x ()
1235+propagateSubscriberHold :: R.Patch p => Hold x p a -> p a -> EventM x ()
15001236propagateSubscriberHold h a = do
1501− {-# SCC "trace" #-} when debugPropagate $ traceM (Proxy :: Proxy x) $ liftIO $ do
1237+ {-# SCC "trace" #-} traceMWhen debugPropagate $ liftIO $ do
15021238 invalidators <- liftIO $ readIORef $ holdInvalidators h
15031239 return $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
1504−
15051240 v <- {-# SCC "read" #-} liftIO $ readIORef $ holdValue h
1506− case {-# SCC "apply" #-} apply a v of
1241+ case {-# SCC "apply" #-} R.apply a v of
15071242 Nothing -> return ()
15081243 Just v' -> do
1509− {-# SCC "trace2" #-} withIncreasedDepth (Proxy :: Proxy x) $
1510− tracePropagate (Proxy :: Proxy x) ("propagateSubscriberHold: assigning Hold" <> showNodeId h)
1244+ {-# SCC "trace2" #-} withIncreasedDepth $ tracePropagate $ "propagateSubscriberHold: assigning Hold" <> showNodeId h
15111245 vRef <- {-# SCC "vRef" #-} liftIO $ evaluate $ holdValue h
15121246 iRef <- {-# SCC "iRef" #-} liftIO $ evaluate $ holdInvalidators h
15131247 defer $ {-# SCC "assignment" #-} SomeAssignment vRef iRef v'
15141248
1515−data SomeResetCoincidence x = forall a. SomeResetCoincidence !(EventSubscription x) !(Maybe (CoincidenceSubscribed x a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
1249+data SomeResetCoincidence x = forall a. SomeResetCoincidence !(EventSubscription x a) !(Maybe (CoincidenceSubscribed x a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
1250+
1251+{-# SPECIALIZE readBehaviorUntracked :: Behavior x a -> BehaviorM x a #-}
1252+{-# SPECIALIZE readBehaviorUntracked :: Behavior x a -> EventM x a #-}
1253+readBehaviorUntracked :: Defer (SomeHoldInit x) m => Behavior x a -> m a
1254+readBehaviorUntracked b = do
1255+ holdInits <- getDeferralQueue
1256+ liftIO $ runBehaviorM (readBehaviorTracked b) Nothing holdInits --TODO: Specialize readBehaviorTracked to the Nothing and Just cases
15161257
15171258runBehaviorM :: BehaviorM x a -> Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]) -> IORef [SomeHoldInit x] -> IO a
1518−runBehaviorM a mwi holdInits = runReaderIO (unBehaviorM a) (mwi, holdInits)
1259+runBehaviorM a mwi holdInits = runReaderT (unBehaviorM a) (mwi, holdInits)
15191260
15201261askInvalidator :: BehaviorM x (Maybe (Weak (Invalidator x)))
15211262askInvalidator = do
1522− (!m, _) <- ask
1263+ (!m, _) <- BehaviorM ask
15231264 case m of
15241265 Nothing -> return Nothing
15251266 Just (!wi, _) -> return $ Just wi
15261267
15271268askParentsRef :: BehaviorM x (Maybe (IORef [SomeBehaviorSubscribed x]))
15281269askParentsRef = do
1529− (!m, _) <- ask
1270+ (!m, _) <- BehaviorM ask
15301271 case m of
15311272 Nothing -> return Nothing
15321273 Just (_, !p) -> return $ Just p
15331274
15341275askBehaviorHoldInits :: BehaviorM x (IORef [SomeHoldInit x])
15351276askBehaviorHoldInits = do
1536− (_, !his) <- ask
1277+ (_, !his) <- BehaviorM ask
15371278 return his
15381279
1280+readBehaviorTracked :: Behavior x a -> BehaviorM x a
1281+readBehaviorTracked b = case b of
1282+ BehaviorHold h -> readHoldTracked h
1283+ BehaviorHoldIdentity h -> readHoldTracked h
1284+ BehaviorConst a -> return a
1285+ BehaviorPull p -> do
1286+ val <- liftIO $ readIORef $ pullValue p
1287+ case val of
1288+ Just subscribed -> do
1289+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
1290+ askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (pullSubscribedInvalidators subscribed) (wi:))
1291+ liftIO $ touch $ pullSubscribedOwnInvalidator subscribed
1292+ return $ pullSubscribedValue subscribed
1293+ Nothing -> do
1294+ i <- liftIO $ newInvalidatorPull p
1295+ wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorPull"
1296+ parentsRef <- liftIO $ newIORef []
1297+ holdInits <- askBehaviorHoldInits
1298+ a <- liftIO $ runReaderT (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
1299+ invsRef <- liftIO . newIORef . maybeToList =<< askInvalidator
1300+ parents <- liftIO $ readIORef parentsRef
1301+ let subscribed = PullSubscribed
1302+ { pullSubscribedValue = a
1303+ , pullSubscribedInvalidators = invsRef
1304+ , pullSubscribedOwnInvalidator = i
1305+ , pullSubscribedParents = parents
1306+ }
1307+ liftIO $ writeIORef (pullValue p) $ Just subscribed
1308+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
1309+ return a
1310+ BehaviorDyn d -> readHoldTracked =<< getDynHold d
1311+ BehaviorDynIdentity d -> readHoldTracked =<< getDynHold d
1312+
1313+{-# INLINE readHoldTracked #-}
1314+readHoldTracked :: Hold x p a -> BehaviorM x a
1315+readHoldTracked h = do
1316+ result <- liftIO $ readIORef $ holdValue h
1317+ askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (holdInvalidators h) (wi:))
1318+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedHold h) :))
1319+ return result
1320+
15391321{-# INLINE getDynHold #-}
1540−getDynHold :: (Defer (SomeHoldInit x) m, Patch p) => Dyn x p -> m (Hold x p)
1322+getDynHold :: (Defer (SomeHoldInit x) m, R.Patch p) => Dyn x p a -> m (Hold x p a)
15411323getDynHold d = do
15421324 mh <- liftIO $ readIORef $ unDyn d
15431325 case mh of
1544− HoldDyn h -> return h
1545− UnsafeDyn (readV0, v') -> do
1326+ Right h -> return h
1327+ Left (readV0, v') -> do
15461328 holdInits <- getDeferralQueue
15471329 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
15541330 h <- hold v0 v'
1555− liftIO $ writeIORef (unDyn d) $ HoldDyn h
1331+ liftIO $ writeIORef (unDyn d) $ Right h
15561332 return h
15571333
1334+readRootSubscribed :: RootSubscribed x a -> IO (Maybe a)
1335+readRootSubscribed = rootSubscribedOccurrence
1336+
1337+readPushSubscribed :: PushSubscribed x b a -> IO (Maybe a)
1338+readPushSubscribed subscribed = do
1339+ result <- readIORef $ pushSubscribedOccurrence subscribed -- Since ResultM is always called after the final height is reached, this will always be valid
1340+ touch $ pushSubscribedSelf subscribed
1341+ return result
1342+
1343+readMergeSubscribed :: MergeSubscribed x k -> IO (Maybe (DMap k Identity))
1344+readMergeSubscribed subscribed = do
1345+ result <- readIORef $ mergeSubscribedOccurrence subscribed
1346+ touch $ mergeSubscribedParents subscribed
1347+ return result
1348+
1349+readFanSubscribed :: GCompare k => k a -> FanSubscribed x k -> IO (Maybe a)
1350+readFanSubscribed k fs = do
1351+ parentOcc <- readEventSubscribed $ _eventSubscription_subscribed $ fanSubscribedParent fs
1352+ return $ coerce $ DMap.lookup k =<< parentOcc
1353+
1354+readSwitchSubscribed :: SwitchSubscribed x a -> IO (Maybe a)
1355+readSwitchSubscribed subscribed = do
1356+ result <- readIORef $ switchSubscribedOccurrence subscribed
1357+ touch $ switchSubscribedOwnInvalidator subscribed
1358+ return result
1359+
1360+readCoincidenceSubscribed :: CoincidenceSubscribed x a -> IO (Maybe a)
1361+readCoincidenceSubscribed subscribed = do
1362+ result <- readIORef $ coincidenceSubscribedOccurrence subscribed
1363+ touch $ coincidenceSubscribedOuter subscribed
1364+ --TODO: do we need to touch the inner subscriber?
1365+ return result
15581366
15591367-- Always refers to 0
15601368{-# NOINLINE zeroRef #-}
15611369zeroRef :: IORef Height
15621370zeroRef = unsafePerformIO $ newIORef zeroHeight
15631371
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)
1372+{-# INLINE debugSubscribe #-}
1373+debugSubscribe :: Bool
1374+debugSubscribe = False
1375+
1376+type CanSubscribe x m =
1377+ ( HasSpiderEnv x m
1378+ , HasCurrentHeight x m
1379+ , Defer (SomeHoldInit x) m, Defer (SomeMergeInit x) m -- The things we need to lazily initialize state
1380+ , Defer SomeClear m -- Wiping out event firings
1381+ , Defer (SomeAssignment x) m -- Updating state
1382+ , Defer (SomeResetCoincidence x) m
1383+ , m ~ EventM x
1384+ )
1385+
1386+getRootSubscribed :: GCompare k => k a -> Root x k -> Subscriber x a -> IO (WeakBagTicket (Subscriber x a), RootSubscribed x a)
15651387getRootSubscribed k r sub = do
15661388 mSubscribed <- readIORef $ rootSubscribed r
1567− let getOcc = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
15681389 case DMap.lookup k mSubscribed of
15691390 Just subscribed -> {-# SCC "hitRoot" #-} do
15701391 sln <- subscribeRootSubscribed subscribed sub
1571− occ <- getOcc
1572− return (sln, subscribed, occ)
1392+ return (sln, subscribed)
15731393 Nothing -> {-# SCC "missRoot" #-} do
15741394 weakSelf <- newIORef $ error "getRootSubscribed: weakSelfRef not initialized"
15751395 let !cached = rootSubscribed r
15761396 uninitRef <- newIORef $ error "getRootsubscribed: uninitRef not initialized"
15771397 (subs, sln) <- WeakBag.singleton sub weakSelf cleanupRootSubscribed
1578−
1579− tracePropagate (Proxy::Proxy x) $ "getRootSubscribed: calling rootInit"
1580−
1398+ when debugPropagate $ putStrLn $ "getRootSubscribed: calling rootInit"
15811399 uninit <- rootInit r k $ RootTrigger (subs, rootOccurrence r, k)
15821400 writeIORef uninitRef $! uninit
1583−#ifdef DEBUG_NODEIDS
1584− nid <- newNodeId
1585−#endif
1586− let !subscribed = RootSubscribed
1401+ let subscribed = RootSubscribed
15871402 { rootSubscribedKey = k
15881403 , rootSubscribedCachedSubscribed = cached
1589− , rootSubscribedOccurrence = getOcc
1404+ , rootSubscribedOccurrence = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
15901405 , rootSubscribedSubscribers = subs
15911406 , rootSubscribedUninit = uninit
15921407 , rootSubscribedWeakSelf = weakSelf
15931408#ifdef DEBUG_NODEIDS
1594− , rootSubscribedNodeId = nid
1409+ , rootSubscribedNodeId = unsafeNodeId (k, r, subs)
15951410#endif
15961411 }
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)
1412+ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "RootSubscribed"
16081413 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
1609− occ <- getOcc
1610− return (sln, subscribed, occ)
1414+ return (sln, subscribed)
16111415
1612−#ifdef USE_TEMPLATE_HASKELL
16131416{-# ANN cleanupRootSubscribed "HLint: ignore Redundant bracket" #-}
1614−#endif
16151417cleanupRootSubscribed :: RootSubscribed x a -> IO ()
1616−cleanupRootSubscribed self@RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached } = do
1418+cleanupRootSubscribed self@(RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached }) = do
16171419 rootSubscribedUninit self
16181420 modifyIORef' cached $ DMap.delete k
16191421
16201422{-# INLINE subscribeRootSubscribed #-}
1621−subscribeRootSubscribed :: RootSubscribed x a -> Subscriber x a -> IO WeakBagTicket
1423+subscribeRootSubscribed :: RootSubscribed x a -> Subscriber x a -> IO (WeakBagTicket (Subscriber x a))
16221424subscribeRootSubscribed subscribed sub = WeakBag.insert sub (rootSubscribedSubscribers subscribed) (rootSubscribedWeakSelf subscribed) cleanupRootSubscribed
16231425
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"
1426+-- When getPushSubscribed returns, the PushSubscribed returned will have a fully filled-in
1427+{-# SPECIALIZE getPushSubscribed :: Push x a b -> Subscriber x b -> EventM x (WeakBagTicket (Subscriber x b), PushSubscribed x a b) #-}
1428+getPushSubscribed :: CanSubscribe x m => Push x a b -> Subscriber x b -> m (WeakBagTicket (Subscriber x b), PushSubscribed x a b)
1429+getPushSubscribed p sub = do
1430+ mSubscribed <- liftIO $ readIORef $ pushSubscribed p
1431+ case mSubscribed of
1432+ Just subscribed -> {-# SCC "hitPush" #-} do
1433+ sln <- liftIO $ subscribePushSubscribed subscribed sub
1434+ return (sln, subscribed)
1435+ Nothing -> {-# SCC "missPush" #-} do -- Not yet subscribed
1436+ subscribedRef <- liftIO $ newIORef $ error "getPushSubscribed: subscribed not yet intialized"
1437+ subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1438+ s <- liftIO $ newSubscriberPush (pushCompute p) subscribedUnsafe
1439+ subscription@(EventSubscription _ subd) <- subscribe (pushParent p) s
1440+ parentOcc <- liftIO $ readEventSubscribed subd
1441+ occ <- runComputeM $ join <$> mapM (pushCompute p) parentOcc
1442+ occRef <- liftIO $ newIORef occ
1443+ when (isJust occ) $ scheduleClear occRef
1444+ weakSelf <- liftIO $ newIORef $ error "getPushSubscribed: weakSelf not initialized"
1445+ let !cached = pushSubscribed p
1446+ (subs, sln) <- liftIO $ WeakBag.singleton sub weakSelf cleanupPushSubscribed
1447+ let subscribed = PushSubscribed
1448+ { pushSubscribedCachedSubscribed = cached
1449+ , pushSubscribedOccurrence = occRef
1450+ , pushSubscribedHeight = eventSubscribedHeightRef subd -- Since pushes have the same height as their parents, share the ref
1451+ , pushSubscribedSubscribers = subs
1452+ , pushSubscribedSelf = s
1453+ , pushSubscribedWeakSelf = weakSelf
1454+ , pushSubscribedParent = subscription
16401455#ifdef DEBUG_NODEIDS
1641− nodeId <- newNodeId
1456+ , pushSubscribedNodeId = unsafeNodeId p
16421457#endif
1643− return $ FanInt
1644− { _fanInt_subscribers = subscribers
1645− , _fanInt_subscriptionRef = subscriptionRef
1646− , _fanInt_occRef = occRef
1458+ }
1459+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "PushSubscribed"
1460+ liftIO $ writeIORef subscribedRef $! subscribed
1461+ liftIO $ writeIORef (pushSubscribed p) $ Just subscribed
1462+ return (sln, subscribed)
1463+
1464+cleanupPushSubscribed :: PushSubscribed x a b -> IO ()
1465+cleanupPushSubscribed self = do
1466+ unsubscribe $ pushSubscribedParent self
1467+ writeIORef (pushSubscribedCachedSubscribed self) $ Nothing
1468+
1469+{-# INLINE subscribePushSubscribed #-}
1470+subscribePushSubscribed :: PushSubscribed x a b -> Subscriber x b -> IO (WeakBagTicket (Subscriber x b))
1471+subscribePushSubscribed subscribed sub = WeakBag.insert sub (pushSubscribedSubscribers subscribed) (pushSubscribedWeakSelf subscribed) cleanupPushSubscribed
1472+
1473+{-# SPECIALIZE getMergeSubscribed :: GCompare k => Merge x k -> Subscriber x (DMap k Identity) -> EventM x (WeakBagTicket (Subscriber x (DMap k Identity)), MergeSubscribed x k) #-}
1474+getMergeSubscribed :: forall x k m. (CanSubscribe x m, GCompare k) => Merge x k -> Subscriber x (DMap k Identity) -> m (WeakBagTicket (Subscriber x (DMap k Identity)), MergeSubscribed x k)
1475+getMergeSubscribed m sub = do
1476+ mSubscribed <- liftIO $ readIORef $ mergeSubscribed m
1477+ case mSubscribed of
1478+ Just subscribed -> {-# SCC "hitMerge" #-} do
1479+ sln <- liftIO $ subscribeMergeSubscribed subscribed sub
1480+ return (sln, subscribed)
1481+ Nothing -> {-# SCC "missMerge" #-} do
1482+ subscribedRef <- liftIO $ newIORef $ error "getMergeSubscribed: subscribedRef not yet initialized"
1483+ subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1484+ initialParents <- readBehaviorUntracked $ current $ mergeParents m
1485+ subscribers :: [(Maybe (DSum k Identity), Height, DSum k (MergeSubscribedParent x k))] <- forM (DMap.toList initialParents) $ {-# SCC "getMergeSubscribed.a" #-} \(k :=> e) -> do
1486+ s <- {-# SCC "getMergeSubscribed.a.1" #-} liftIO $ newSubscriberMerge k subscribedUnsafe
1487+ subscription@(EventSubscription _ parentSubd) <- {-# SCC "getMergeSubscribed.a.2" #-} subscribe e s
1488+ parentOcc <- {-# SCC "getMergeSubscribed.a.3" #-} liftIO $ readEventSubscribed parentSubd
1489+ height <- {-# SCC "getMergeSubscribed.a.4" #-} liftIO $ getEventSubscribedHeight parentSubd
1490+ {-# SCC "getMergeSubscribed.a.5" #-} return $ (fmap (\x -> k :=> Identity x) parentOcc, height, k :=> MergeSubscribedParent subscription s)
1491+ let dm = DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1492+ heights = fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1493+ myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
1494+ myHeight = if invalidHeight `elem` heights
1495+ then invalidHeight
1496+ else succHeight $ heightBagMax myHeightBag
1497+ currentHeight <- getCurrentHeight
1498+ let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
1499+ then (if DMap.null dm then Nothing else Just dm, DMap.empty)
1500+ else (Nothing, dm)
1501+ unless (DMap.null accum) $ do
1502+ scheduleMerge myHeight subscribedUnsafe
1503+ occRef <- liftIO $ newIORef occ
1504+ when (isJust occ) $ scheduleClear occRef
1505+ accumRef <- liftIO $ newIORef accum
1506+ heightRef <- liftIO $ newIORef myHeight
1507+ heightMapRef <- liftIO $ newIORef myHeightBag
1508+ weakSelf <- liftIO $ newIORef $ error "getMergeSubscribed: weakSelf not yet initialized"
1509+ (subs, sln) <- liftIO $ WeakBag.singleton sub weakSelf cleanupMergeSubscribed
1510+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
1511+ parentsRef <- liftIO $ newIORef $ DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1512+ let !subscribed = MergeSubscribed
1513+ { mergeSubscribedCachedSubscribed = mergeSubscribed m
1514+ , mergeSubscribedOccurrence = occRef
1515+ , mergeSubscribedAccum = accumRef
1516+ , mergeSubscribedHeight = heightRef
1517+ , mergeSubscribedHeightBag = heightMapRef
1518+ , mergeSubscribedSubscribers = subs
1519+ , mergeSubscribedChange = changeSubdRef
1520+ , mergeSubscribedParents = parentsRef
1521+ , mergeSubscribedWeakSelf = weakSelf
16471522#ifdef DEBUG_NODEIDS
1648− , _fanInt_nodeId = nodeId
1523+ , mergeSubscribedNodeId = unsafeNodeId m
16491524#endif
1650− }
1651−
1652−fanInt :: HasSpiderTimeline x => Event x (IntMap a) -> EventSelectorInt x a
1653−fanInt p = unsafePerformIO $ do
1654− self <- newFanInt
1655− pure $ EventSelectorInt $ \k -> Event $ \sub -> do
1656− isEmpty <- liftIO $ FastMutableIntMap.isEmpty (_fanInt_subscribers self)
1657− when isEmpty $ do -- This is the first subscriber, so we need to subscribe to our input
1658− let desc = "fanInt" <> showNodeId self <> ", k = " <> show k
1659− (subscription, parentOcc) <- subscribeAndRead p $ debugSubscriber' desc $ Subscriber
1660− { subscriberPropagate = \m -> do
1661− liftIO $ writeIORef (_fanInt_occRef self) m
1662− scheduleIntClear $ _fanInt_occRef self
1663− FastMutableIntMap.forIntersectionWithImmutable_ (_fanInt_subscribers self) m $ \b v -> --TODO: Do we need to know that no subscribers are being added as we traverse?
1664− FastWeakBag.traverse_ b $ \s ->
1665− subscriberPropagate s v
1666− , subscriberInvalidateHeight = \old ->
1667− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1668− FastWeakBag.traverse_ b $ \s ->
1669− subscriberInvalidateHeight s old
1670− , subscriberRecalculateHeight = \new ->
1671− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1672− FastWeakBag.traverse_ b $ \s ->
1673− subscriberRecalculateHeight s new
1674− }
1675− liftIO $ do
1676− writeIORef (_fanInt_subscriptionRef self) subscription
1677− writeIORef (_fanInt_occRef self) $ fromMaybe IntMap.empty parentOcc
1678− scheduleIntClear $ _fanInt_occRef self
1679− liftIO $ do
1680− b <- FastMutableIntMap.lookup (_fanInt_subscribers self) k >>= \case
1681− Nothing -> do
1682− b <- FastWeakBag.empty
1683− FastMutableIntMap.insert (_fanInt_subscribers self) k b
1684− return b
1685− Just b -> return b
1686− ticket <- liftIO $ FastWeakBag.insert sub b
1687− currentOcc <- readIORef (_fanInt_occRef self)
1688−
1689− subscribed <- fanIntSubscribed ticket self
1690− return (EventSubscription (FastWeakBag.remove ticket) subscribed, IntMap.lookup k currentOcc)
1691−
1692−fanIntSubscribed :: FastWeakBagTicket k -> FanInt x a -> IO (EventSubscribed x)
1693−fanIntSubscribed ticket self = do
1694− subscribedParent <- _eventSubscription_subscribed <$> readIORef (_fanInt_subscriptionRef self)
1695− return $ EventSubscribed
1696− { eventSubscribedHeightRef = eventSubscribedHeightRef subscribedParent
1697− , eventSubscribedRetained = toAny (_fanInt_subscriptionRef self, ticket)
1698−#ifdef DEBUG_CYCLES
1699− , eventSubscribedGetParents = return [subscribedParent]
1700− , eventSubscribedHasOwnHeightRef = False
1701− , eventSubscribedWhoCreated = whoCreatedIORef $ _fanInt_subscriptionRef self
1702−#endif
1703− }
1704−
1705−
1706−{-# INLINABLE getFanSubscribed #-}
1707−getFanSubscribed :: (HasSpiderTimeline x, GCompare k) => k a -> Fan x k v -> Subscriber x (v a) -> EventM x (WeakBagTicket, FanSubscribed x k v, Maybe (v a))
1525+ }
1526+ defer $ SomeMergeInit subscribed $ updated $ mergeParents m
1527+ liftIO $ writeIORef subscribedRef $! subscribed
1528+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "MergeSubscribed"
1529+ liftIO $ writeIORef (mergeSubscribed m) $ Just subscribed
1530+ return (sln, subscribed)
1531+
1532+cleanupMergeSubscribed :: MergeSubscribed x k -> IO ()
1533+cleanupMergeSubscribed subscribed = do
1534+ parents <- readIORef $ mergeSubscribedParents subscribed
1535+ forM_ (DMap.toList parents) $ \(_ :=> msp) -> unsubscribe $ mergeSubscribedParentSubscription msp
1536+ -- Not necessary, because this whole MergeSubscribed is dead: writeIORef (mergeSubscribedParents subscribed) DMap.empty
1537+ writeIORef (mergeSubscribedCachedSubscribed subscribed) $ Nothing -- Get rid of the cached subscribed
1538+
1539+{-# INLINE subscribeMergeSubscribed #-}
1540+subscribeMergeSubscribed :: MergeSubscribed x k -> Subscriber x (DMap k Identity) -> IO (WeakBagTicket (Subscriber x (DMap k Identity)))
1541+subscribeMergeSubscribed subscribed sub = WeakBag.insert sub (mergeSubscribedSubscribers subscribed) (mergeSubscribedWeakSelf subscribed) cleanupMergeSubscribed
1542+
1543+{-# SPECIALIZE getFanSubscribed :: GCompare k => k a -> Fan x k -> Subscriber x a -> EventM x (WeakBagTicket (Subscriber x a), FanSubscribed x k) #-}
1544+getFanSubscribed :: (Defer (SomeAssignment x) m, Defer (SomeHoldInit x) m, Defer (SomeMergeInit x) m, Defer SomeClear m, HasCurrentHeight x m, Defer (SomeResetCoincidence x) m, HasSpiderEnv x m, m ~ EventM x, GCompare k) => k a -> Fan x k -> Subscriber x a -> m (WeakBagTicket (Subscriber x a), FanSubscribed x k)
17081545getFanSubscribed k f sub = do
17091546 mSubscribed <- liftIO $ readIORef $ fanSubscribed f
17101547 case mSubscribed of
1711− Just subscribed -> {-# SCC "hitFan" #-} liftIO $ do
1712− sln <- subscribeFanSubscribed k subscribed sub
1713− occ <- readIORef $ fanSubscribedOccurrence subscribed
1714− return (sln, subscribed, coerce $ DMap.lookup k =<< occ)
1548+ Just subscribed -> {-# SCC "hitFan" #-} do
1549+ sln <- liftIO $ subscribeFanSubscribed k subscribed sub
1550+ return (sln, subscribed)
17151551 Nothing -> {-# SCC "missFan" #-} do
17161552 subscribedRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribedRef not yet initialized"
17171553 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
17181554 s <- liftIO $ newSubscriberFan subscribedUnsafe
1719− (subscription, parentOcc) <- subscribeAndRead (fanParent f) s
1555+ subscription <- subscribe (fanParent f) s
17201556 weakSelf <- liftIO $ newIORef $ error "getFanSubscribed: weakSelf not yet initialized"
17211557 (subsForK, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupFanSubscribed
17221558 subscribersRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribersRef not yet initialized"
1723− occRef <- liftIO $ newIORef parentOcc
1724− when (isJust parentOcc) $ scheduleClear occRef
1725−#ifdef DEBUG_NODEIDS
1726− nid <- liftIO newNodeId
1727−#endif
17281559 let subscribed = FanSubscribed
17291560 { fanSubscribedCachedSubscribed = fanSubscribed f
1730− , fanSubscribedOccurrence = occRef
17311561 , fanSubscribedParent = subscription
17321562 , fanSubscribedSubscribers = subscribersRef
17331563#ifdef DEBUG_NODEIDS
1734− , fanSubscribedNodeId = nid
1564+ , fanSubscribedNodeId = unsafeNodeId f
17351565#endif
17361566 }
17371567 let !self = (k, subscribed)
@@ -1739,9 +1569,9 @@ getFanSubscribed k f sub = do
17391569 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug self "FanSubscribed"
17401570 liftIO $ writeIORef subscribedRef $! subscribed
17411571 liftIO $ writeIORef (fanSubscribed f) $ Just subscribed
1742− return (slnForSub, subscribed, coerce $ DMap.lookup k =<< parentOcc)
1572+ return (slnForSub, subscribed)
17431573
1744−cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed x k v) -> IO ()
1574+cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed x k) -> IO ()
17451575cleanupFanSubscribed (k, subscribed) = do
17461576 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
17471577 let reducedSubscribers = DMap.delete k subscribers
@@ -1753,7 +1583,7 @@ cleanupFanSubscribed (k, subscribed) = do
17531583 else writeIORef (fanSubscribedSubscribers subscribed) $! reducedSubscribers
17541584
17551585{-# INLINE subscribeFanSubscribed #-}
1756−subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed x k v -> Subscriber x (v a) -> IO WeakBagTicket
1586+subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed x k -> Subscriber x a -> IO (WeakBagTicket (Subscriber x a))
17571587subscribeFanSubscribed k subscribed sub = do
17581588 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
17591589 case DMap.lookup k subscribers of
@@ -1761,19 +1591,18 @@ subscribeFanSubscribed k subscribed sub = do
17611591 let !self = (k, subscribed)
17621592 weakSelf <- newIORef =<< mkWeakPtrWithDebug self "FanSubscribed"
17631593 (list, sln) <- WeakBag.singleton sub weakSelf cleanupFanSubscribed
1764− writeIORef (fanSubscribedSubscribers subscribed) $! DMap.insertWith (error "subscribeFanSubscribed: key that we just failed to find is present - should be impossible") k (FanSubscribedChildren list self weakSelf) subscribers
1594+ writeIORef (fanSubscribedSubscribers subscribed) $! DMap.insertWith (error "subscribeEventSubscribed: key that we just failed to find is present - should be impossible") k (FanSubscribedChildren list self weakSelf) subscribers
17651595 return sln
17661596 Just (FanSubscribedChildren list _ weakSelf) -> {-# SCC "hitSubscribeFanSubscribed" #-} WeakBag.insert sub list weakSelf cleanupFanSubscribed
17671597
1768−{-# INLINABLE getSwitchSubscribed #-}
1769−getSwitchSubscribed :: HasSpiderTimeline x => Switch x a -> Subscriber x a -> EventM x (WeakBagTicket, SwitchSubscribed x a, Maybe a)
1598+{-# SPECIALIZE getSwitchSubscribed :: Switch x a -> Subscriber x a -> EventM x (WeakBagTicket (Subscriber x a), SwitchSubscribed x a) #-}
1599+getSwitchSubscribed :: (Defer (SomeHoldInit x) m, Defer (SomeAssignment x) m, Defer (SomeMergeInit x) m, Defer SomeClear m, Defer (SomeResetCoincidence x) m, HasCurrentHeight x m, HasSpiderEnv x m, m ~ EventM x) => Switch x a -> Subscriber x a -> m (WeakBagTicket (Subscriber x a), SwitchSubscribed x a)
17701600getSwitchSubscribed s sub = do
17711601 mSubscribed <- liftIO $ readIORef $ switchSubscribed s
17721602 case mSubscribed of
1773− Just subscribed -> {-# SCC "hitSwitch" #-} liftIO $ do
1774− sln <- subscribeSwitchSubscribed subscribed sub
1775− occ <- readIORef $ switchSubscribedOccurrence subscribed
1776− return (sln, subscribed, occ)
1603+ Just subscribed -> {-# SCC "hitSwitch" #-} do
1604+ sln <- liftIO $ subscribeSwitchSubscribed subscribed sub
1605+ return (sln, subscribed)
17771606 Nothing -> {-# SCC "missSwitch" #-} do
17781607 subscribedRef <- liftIO $ newIORef $ error "getSwitchSubscribed: subscribed has not yet been created"
17791608 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
@@ -1784,16 +1613,14 @@ getSwitchSubscribed s sub = do
17841613 parentsRef <- liftIO $ newIORef [] --TODO: This should be unnecessary, because it will always be filled with just the single parent behavior
17851614 holdInits <- getDeferralQueue
17861615 e <- liftIO $ runBehaviorM (readBehaviorTracked (switchParent s)) (Just (wi, parentsRef)) holdInits
1787− (subscription@(EventSubscription _ subd), parentOcc) <- subscribeAndRead e mySub
1788− heightRef <- liftIO $ newIORef =<< getEventSubscribedHeight subd
1616+ subscription@(EventSubscription _ subd) <- subscribe e mySub
17891617 subscriptionRef <- liftIO $ newIORef subscription
1618+ parentOcc <- liftIO $ readEventSubscribed subd
17901619 occRef <- liftIO $ newIORef parentOcc
17911620 when (isJust parentOcc) $ scheduleClear occRef
1621+ heightRef <- liftIO $ newIORef =<< getEventSubscribedHeight subd
17921622 weakSelf <- liftIO $ newIORef $ error "getSwitchSubscribed: weakSelf not yet initialized"
17931623 (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupSwitchSubscribed
1794−#ifdef DEBUG_NODEIDS
1795− nid <- liftIO newNodeId
1796−#endif
17971624 let !subscribed = SwitchSubscribed
17981625 { switchSubscribedCachedSubscribed = switchSubscribed s
17991626 , switchSubscribedOccurrence = occRef
@@ -1806,13 +1633,13 @@ getSwitchSubscribed s sub = do
18061633 , switchSubscribedCurrentParent = subscriptionRef
18071634 , switchSubscribedWeakSelf = weakSelf
18081635#ifdef DEBUG_NODEIDS
1809− , switchSubscribedNodeId = nid
1636+ , switchSubscribedNodeId = unsafeNodeId s
18101637#endif
18111638 }
18121639 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "switchSubscribedWeakSelf"
18131640 liftIO $ writeIORef subscribedRef $! subscribed
18141641 liftIO $ writeIORef (switchSubscribed s) $ Just subscribed
1815− return (slnForSub, subscribed, parentOcc)
1642+ return (slnForSub, subscribed)
18161643
18171644cleanupSwitchSubscribed :: SwitchSubscribed x a -> IO ()
18181645cleanupSwitchSubscribed subscribed = do
@@ -1821,23 +1648,23 @@ cleanupSwitchSubscribed subscribed = do
18211648 writeIORef (switchSubscribedCachedSubscribed subscribed) Nothing
18221649
18231650{-# INLINE subscribeSwitchSubscribed #-}
1824−subscribeSwitchSubscribed :: SwitchSubscribed x a -> Subscriber x a -> IO WeakBagTicket
1651+subscribeSwitchSubscribed :: SwitchSubscribed x a -> Subscriber x a -> IO (WeakBagTicket (Subscriber x a))
18251652subscribeSwitchSubscribed subscribed sub = WeakBag.insert sub (switchSubscribedSubscribers subscribed) (switchSubscribedWeakSelf subscribed) cleanupSwitchSubscribed
18261653
1827−{-# INLINABLE getCoincidenceSubscribed #-}
1828−getCoincidenceSubscribed :: forall x a. HasSpiderTimeline x => Coincidence x a -> Subscriber x a -> EventM x (WeakBagTicket, CoincidenceSubscribed x a, Maybe a)
1654+{-# SPECIALIZE getCoincidenceSubscribed :: Coincidence x a -> Subscriber x a -> EventM x (WeakBagTicket (Subscriber x a), CoincidenceSubscribed x a) #-}
1655+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, HasSpiderEnv x m, m ~ EventM x) => Coincidence x a -> Subscriber x a -> m (WeakBagTicket (Subscriber x a), CoincidenceSubscribed x a)
18291656getCoincidenceSubscribed c sub = do
18301657 mSubscribed <- liftIO $ readIORef $ coincidenceSubscribed c
18311658 case mSubscribed of
1832− Just subscribed -> {-# SCC "hitCoincidence" #-} liftIO $ do
1833− sln <- subscribeCoincidenceSubscribed subscribed sub
1834− occ <- readIORef $ coincidenceSubscribedOccurrence subscribed
1835− return (sln, subscribed, occ)
1659+ Just subscribed -> {-# SCC "hitCoincidence" #-} do
1660+ sln <- liftIO $ subscribeCoincidenceSubscribed subscribed sub
1661+ return (sln, subscribed)
18361662 Nothing -> {-# SCC "missCoincidence" #-} do
18371663 subscribedRef <- liftIO $ newIORef $ error "getCoincidenceSubscribed: subscribed has not yet been created"
18381664 subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
18391665 subOuter <- liftIO $ newSubscriberCoincidenceOuter subscribedUnsafe
1840− (outerSubscription@(EventSubscription _ outerSubd), outerOcc) <- subscribeAndRead (coincidenceParent c) subOuter
1666+ outerSubscription@(EventSubscription _ outerSubd) <- subscribe (coincidenceParent c) subOuter
1667+ outerOcc <- liftIO $ readEventSubscribed outerSubd
18411668 outerHeight <- liftIO $ getEventSubscribedHeight outerSubd
18421669 (occ, height, mInnerSubd) <- case outerOcc of
18431670 Nothing -> return (Nothing, outerHeight, Nothing)
@@ -1851,9 +1678,6 @@ getCoincidenceSubscribed c sub = do
18511678 scheduleClear innerSubdRef
18521679 weakSelf <- liftIO $ newIORef $ error "getCoincidenceSubscribed: weakSelf not yet implemented"
18531680 (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupCoincidenceSubscribed
1854−#ifdef DEBUG_NODEIDS
1855− nid <- liftIO newNodeId
1856−#endif
18571681 let subscribed = CoincidenceSubscribed
18581682 { coincidenceSubscribedCachedSubscribed = coincidenceSubscribed c
18591683 , coincidenceSubscribedOccurrence = occRef
@@ -1864,13 +1688,13 @@ getCoincidenceSubscribed c sub = do
18641688 , coincidenceSubscribedInnerParent = innerSubdRef
18651689 , coincidenceSubscribedWeakSelf = weakSelf
18661690#ifdef DEBUG_NODEIDS
1867− , coincidenceSubscribedNodeId = nid
1691+ , coincidenceSubscribedNodeId = unsafeNodeId c
18681692#endif
18691693 }
18701694 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "CoincidenceSubscribed"
18711695 liftIO $ writeIORef subscribedRef $! subscribed
18721696 liftIO $ writeIORef (coincidenceSubscribed c) $ Just subscribed
1873− return (slnForSub, subscribed, occ)
1697+ return (slnForSub, subscribed)
18741698
18751699cleanupCoincidenceSubscribed :: CoincidenceSubscribed x a -> IO ()
18761700cleanupCoincidenceSubscribed subscribed = do
@@ -1878,535 +1702,146 @@ cleanupCoincidenceSubscribed subscribed = do
18781702 writeIORef (coincidenceSubscribedCachedSubscribed subscribed) Nothing
18791703
18801704{-# INLINE subscribeCoincidenceSubscribed #-}
1881−subscribeCoincidenceSubscribed :: CoincidenceSubscribed x a -> Subscriber x a -> IO WeakBagTicket
1705+subscribeCoincidenceSubscribed :: CoincidenceSubscribed x a -> Subscriber x a -> IO (WeakBagTicket (Subscriber x a))
18821706subscribeCoincidenceSubscribed subscribed sub = WeakBag.insert sub (coincidenceSubscribedSubscribers subscribed) (coincidenceSubscribedWeakSelf subscribed) cleanupCoincidenceSubscribed
18831707
1884−{-# INLINE mergeG #-}
1885−mergeG :: forall k q x v. (HasSpiderTimeline x, GCompare k)
1886− => (forall a. q a -> Event x (v a))
1887− -> DynamicS x (PatchDMap k q) -> Event x (DMap k v)
1888−mergeG nt d = cacheEvent (mergeCheap nt d)
1889−
1890−{-# INLINE mergeWithMove #-}
1891−mergeWithMove :: forall k v q x. (HasSpiderTimeline x, GCompare k)
1892− => (forall a. q a -> Event x (v a))
1893− -> DynamicS x (PatchDMapWithMove k q) -> Event x (DMap k v)
1894−mergeWithMove nt d = cacheEvent (mergeCheapWithMove nt d)
1895−
1896−{-# INLINE [1] mergeCheap #-}
1897−mergeCheap
1898− :: forall k x q v. (HasSpiderTimeline x, GCompare k)
1899− => (forall a. q a -> Event x (v a))
1900− -> DynamicS x (PatchDMap k q)
1901− -> Event x (DMap k v)
1902−mergeCheap nt = mergeGCheap' unMergeSubscribedParent getInitialSubscribers updateMe destroy
1903− where
1904− updateMe :: MergeUpdateFunc k v x (PatchDMap k q) (MergeSubscribedParent x)
1905− updateMe subscriber heightBagRef oldParents (PatchDMap p) = do
1906− let f (subscriptionsToKill, ps) (k :=> ComposeMaybe me) = do
1907− (mOldSubd, newPs) <- case me of
1908− Nothing -> return $ DMap.updateLookupWithKey (\_ _ -> Nothing) k ps
1909− Just e -> do
1910− let s = subscriber $ return k
1911− subscription@(EventSubscription _ subd) <- subscribe (nt e) s
1912− newParentHeight <- liftIO $ getEventSubscribedHeight subd
1913− let newParent = MergeSubscribedParent subscription
1914− liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1915− return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
1916− forM_ mOldSubd $ \oldSubd -> do
1917− oldHeight <- liftIO $ getEventSubscribedHeight $
1918− _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1919−
1920− liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1921− return (maybeToList (unMergeSubscribedParent <$> mOldSubd) ++ subscriptionsToKill, newPs)
1922− foldM f ([], oldParents) $ DMap.toList p
1923−
1924− getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParent x)
1925− getInitialSubscribers initialParents subscriber = do
1926− subscribers <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1927− let s = subscriber $ return k
1928− (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead (nt e) s
1929− height <- liftIO $ getEventSubscribedHeight parentSubd
1930− return (fmap (k :=>) parentOcc, height, k :=> MergeSubscribedParent subscription)
1931− return ( DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1932− , fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1933− , DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1934− )
1935−
1936− destroy :: MergeDestroyFunc k (MergeSubscribedParent x)
1937− destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParent sub) -> unsubscribe sub
1938−
1939−{-# INLINE [1] mergeCheapWithMove #-}
1940−mergeCheapWithMove :: forall k x v q. (HasSpiderTimeline x, GCompare k)
1941− => (forall a. q a -> Event x (v a))
1942− -> DynamicS x (PatchDMapWithMove k q)
1943− -> Event x (DMap k v)
1944−mergeCheapWithMove nt = mergeGCheap' _mergeSubscribedParentWithMove_subscription getInitialSubscribers updateMe destroy
1945− where
1946− updateMe :: MergeUpdateFunc k v x (PatchDMapWithMove k q) (MergeSubscribedParentWithMove x k)
1947− updateMe subscriber heightBagRef oldParents p = do
1948− -- Prepare new parents for insertion
1949− let subscribeParent :: forall a. k a -> Event x (v a) -> EventM x (MergeSubscribedParentWithMove x k a)
1950− subscribeParent k e = do
1951− keyRef <- liftIO $ newIORef k
1952− let s = subscriber $ liftIO $ readIORef keyRef
1953− subscription@(EventSubscription _ subd) <- subscribe e s
1954− liftIO $ do
1955− newParentHeight <- getEventSubscribedHeight subd
1956− modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1957− return $ MergeSubscribedParentWithMove subscription keyRef
1958− p' <- PatchDMapWithMove.traversePatchDMapWithMoveWithKey (\k q -> subscribeParent k (nt q)) p
1959− -- Collect old parents for deletion and update the keys of moved parents
1960− let moveOrDelete :: forall a. k a -> PatchDMapWithMove.NodeInfo k q a -> MergeSubscribedParentWithMove x k a -> Constant (EventM x (Maybe (EventSubscription x))) a
1961− moveOrDelete _ ni parent = Constant $ case getComposeMaybe $ PatchDMapWithMove._nodeInfo_to ni of
1962− Nothing -> do
1963− oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $
1964− _mergeSubscribedParentWithMove_subscription parent
1965−
1966− liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1967− return $ Just $ _mergeSubscribedParentWithMove_subscription parent
1968− Just toKey -> do
1969− liftIO $ writeIORef (_mergeSubscribedParentWithMove_key parent) $! toKey
1970− return Nothing
1971− toDelete <- fmap catMaybes $ mapM (\(_ :=> v) -> getConstant v) $ DMap.toList $
1972− DMap.intersectionWithKey moveOrDelete (unPatchDMapWithMove p) oldParents
1973−
1974− return (toDelete, applyAlways p' oldParents)
1975− getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParentWithMove x k)
1976− getInitialSubscribers initialParents subscriber = do
1977− subscribers <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1978− keyRef <- liftIO $ newIORef k
1979− let s = subscriber $ liftIO $ readIORef keyRef
1980− (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead (nt e) s
1981− height <- liftIO $ getEventSubscribedHeight parentSubd
1982− return (fmap (k :=>) parentOcc, height, k :=> MergeSubscribedParentWithMove subscription keyRef)
1983− return ( DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1984− , fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1985− , DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1986− )
1987−
1988− destroy :: MergeDestroyFunc k (MergeSubscribedParentWithMove x k)
1989− destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParentWithMove sub _) -> unsubscribe sub
1990−
1991−type MergeUpdateFunc k v x p s
1992− = (forall a. EventM x (k a) -> Subscriber x (v a))
1993− -> IORef HeightBag
1994− -> DMap k s
1995− -> p
1996− -> EventM x ([EventSubscription x], DMap k s)
1997−
1998−type MergeGetSubscription x s = forall a. s a -> EventSubscription x
1999−
2000−type MergeInitFunc k v q x s
2001− = DMap k q
2002− -> (forall a. EventM x (k a) -> Subscriber x (v a))
2003− -> EventM x (DMap k v, [Height], DMap k s)
2004−
2005−type MergeDestroyFunc k s
2006− = DMap k s
2007− -> IO ()
2008−
2009−data Merge x k v s = Merge
2010− { _merge_parentsRef :: {-# UNPACK #-} !(IORef (DMap k s))
2011− , _merge_heightBagRef :: {-# UNPACK #-} !(IORef HeightBag)
2012− , _merge_heightRef :: {-# UNPACK #-} !(IORef Height)
2013− , _merge_sub :: {-# UNPACK #-} !(Subscriber x (DMap k v))
2014− , _merge_accumRef :: {-# UNPACK #-} !(IORef (DMap k v))
2015− }
2016−
2017−invalidateMergeHeight :: Merge x k v s -> IO ()
2018−invalidateMergeHeight m = invalidateMergeHeight' (_merge_heightRef m) (_merge_sub m)
2019−
2020−invalidateMergeHeight' :: IORef Height -> Subscriber x a -> IO ()
2021−invalidateMergeHeight' heightRef sub = do
2022− oldHeight <- readIORef heightRef
2023− -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
2024− when (oldHeight /= invalidHeight) $ do
2025− writeIORef heightRef $! invalidHeight
2026− subscriberInvalidateHeight sub oldHeight
2027−
2028−revalidateMergeHeight :: Merge x k v s -> IO ()
2029−revalidateMergeHeight m = do
2030− currentHeight <- readIORef $ _merge_heightRef m
2031−
2032− -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
2033− when (currentHeight == invalidHeight) $ do
2034− heights <- readIORef $ _merge_heightBagRef m
2035− parents <- readIORef $ _merge_parentsRef m
2036− -- When the number of heights in the bag reaches the number of parents, we should have a valid height
2037− case heightBagSize heights `compare` DMap.size parents of
2038− LT -> return ()
2039− EQ -> do
2040− let height = succHeight $ heightBagMax heights
2041− traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
2042− writeIORef (_merge_heightRef m) $! height
2043− subscriberRecalculateHeight (_merge_sub m) height
2044− GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show (DMap.size parents) <> ") for Merge"
2045−
2046−scheduleMergeSelf :: HasSpiderTimeline x => Merge x k v s -> Height -> EventM x ()
2047−scheduleMergeSelf m height = scheduleMerge' height (_merge_heightRef m) $ do
2048− vals <- liftIO $ readIORef $ _merge_accumRef m
2049− -- Once we're done with this, we can clear it immediately, because if there's a cacheEvent in front of us,
2050− -- it'll handle subsequent subscribers, and if not, we won't get subsequent subscribers
2051− liftIO $ writeIORef (_merge_accumRef m) $! DMap.empty
2052− --TODO: Assert that m is not empty
2053− subscriberPropagate (_merge_sub m) vals
2054−
2055−checkCycle :: HasSpiderTimeline x => EventSubscribed x -> EventM x ()
2056−checkCycle subscribed = liftIO $ do
2057− height <- readIORef (eventSubscribedHeightRef subscribed)
2058−
2059− -- currentHeight <- getCurrentHeight
2060− -- when (height <= currentHeight) $ if height /= invalidHeight
2061− -- then do
2062− -- myStack <- liftIO $ whoCreatedIORef undefined --TODO
2063− -- error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
2064− -- else liftIO $
2065− when (height == invalidHeight) $
2066−#ifdef DEBUG_CYCLES
2067− do
2068− nodesInvolvedInCycle <- walkInvalidHeightParents subscribed
2069− stacks <- forM nodesInvolvedInCycle whoCreatedEventSubscribed
2070− throwIO (EventLoopException stacks)
2071−#else
2072− throwIO EventLoopException
2073−#endif
2074−
2075−
2076−mergeSubscriber :: forall x k v s a. (HasSpiderTimeline x, GCompare k) => EventSubscribed x -> Merge x k v s -> EventM x (k a) -> Subscriber x (v a)
2077−mergeSubscriber subscribed m getKey = Subscriber
2078− { subscriberPropagate = \a -> do
2079− oldM <- liftIO $ readIORef $ _merge_accumRef m
2080− k <- getKey
2081− let newM = DMap.insertWith (error "Same key fired multiple times for Merge") k a oldM
2082− tracePropagate (Proxy :: Proxy x) $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
2083− liftIO $ writeIORef (_merge_accumRef m) $! newM
2084− when (DMap.null oldM) $ do -- Only schedule the firing once
2085− height <- liftIO $ readIORef $ _merge_heightRef m
2086− checkCycle subscribed
2087−
2088− scheduleMergeSelf m height
2089− , subscriberInvalidateHeight = \old -> do --TODO: When removing a parent doesn't actually change the height, maybe we can avoid invalidating
2090− modifyIORef' (_merge_heightBagRef m) $ heightBagRemove old
2091− invalidateMergeHeight m
2092− , subscriberRecalculateHeight = \new -> do
2093− modifyIORef' (_merge_heightBagRef m) $ heightBagAdd new
2094− revalidateMergeHeight m
1708+{-# INLINE merge #-}
1709+merge :: GCompare k => Dynamic x R.PatchDMap (DMap k (Event x)) -> Event x (DMap k Identity)
1710+merge m = eventMerge $ Merge
1711+ { mergeParents = m
1712+ , mergeSubscribed = unsafeNewIORef m Nothing
20951713 }
20961714
2097−--TODO: Be able to run as much of this as possible promptly
2098−updateMerge :: (HasSpiderTimeline x, GCompare k) => EventSubscribed x -> Merge x k v s -> MergeUpdateFunc k v x p s -> p -> SomeMergeUpdate x
2099−updateMerge subscribed m updateFunc p = SomeMergeUpdate updateMe (invalidateMergeHeight m) (revalidateMergeHeight m)
2100− where updateMe = do
2101− oldParents <- liftIO $ readIORef $ _merge_parentsRef m
2102− (subscriptionsToKill, newParents) <- updateFunc (mergeSubscriber subscribed m) (_merge_heightBagRef m) oldParents p
2103− liftIO $ writeIORef (_merge_parentsRef m) $! newParents
2104− return subscriptionsToKill
2105−
2106−{-# INLINE mergeGCheap' #-}
2107−mergeGCheap' :: forall k v x p s q. (HasSpiderTimeline x, GCompare k, PatchTarget p ~ DMap k q)
2108− => MergeGetSubscription x s -> MergeInitFunc k v q x s -> MergeUpdateFunc k v x p s -> MergeDestroyFunc k s -> DynamicS x p -> Event x (DMap k v)
2109−mergeGCheap' getParent getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
2110− initialParents <- readBehaviorUntracked $ dynamicCurrent d
2111− accumRef <- liftIO $ newIORef $ error "merge: accumRef not yet initialized"
2112− heightRef <- liftIO $ newIORef $ error "merge: heightRef not yet initialized"
2113− heightBagRef <- liftIO $ newIORef $ error "merge: heightBagRef not yet initialized"
2114− parentsRef :: IORef (DMap k s) <- liftIO $ newIORef $ error "merge: parentsRef not yet initialized"
2115− changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2116−
2117− let subscribed = EventSubscribed
2118− { eventSubscribedHeightRef = heightRef
2119− , eventSubscribedRetained = toAny (parentsRef, changeSubdRef)
2120−#ifdef DEBUG_CYCLES
2121− , eventSubscribedGetParents = do
2122− let getParent' (_ :=> v) = _eventSubscription_subscribed (getParent v)
2123− fmap getParent' . DMap.toList <$> readIORef parentsRef
2124− , eventSubscribedHasOwnHeightRef = False
2125− , eventSubscribedWhoCreated = whoCreatedIORef heightRef
2126−#endif
2127− }
2128−
2129− m = Merge
2130− { _merge_parentsRef = parentsRef
2131− , _merge_heightBagRef = heightBagRef
2132− , _merge_heightRef = heightRef
2133− , _merge_sub = sub
2134− , _merge_accumRef = accumRef
2135− }
2136− (dm, heights, initialParentState) <- getInitialSubscribers initialParents $ mergeSubscriber subscribed m
2137− let myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
2138− myHeight = if invalidHeight `elem` heights
2139− then invalidHeight
2140− else succHeight $ heightBagMax myHeightBag
2141− currentHeight <- getCurrentHeight
2142− let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
2143− then (if DMap.null dm then Nothing else Just dm, DMap.empty)
2144− else (Nothing, dm)
2145− unless (DMap.null accum) $ scheduleMergeSelf m myHeight
2146− liftIO $ writeIORef accumRef $! accum
2147− liftIO $ writeIORef heightRef $! myHeight
2148− liftIO $ writeIORef heightBagRef $! myHeightBag
2149− liftIO $ writeIORef parentsRef $! initialParentState
2150− defer $ SomeMergeInit $ do
2151− let changeSubscriber = Subscriber
2152− { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
2153− tracePropagate (Proxy :: Proxy x) "SubscriberMerge/Change"
2154− defer $ updateMerge subscribed m updateFunc a
2155− , subscriberInvalidateHeight = \_ -> return ()
2156− , subscriberRecalculateHeight = \_ -> return ()
2157− }
2158− (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
2159− forM_ change $ \c -> defer $ updateMerge subscribed m updateFunc c
2160− -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
2161− -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
2162− -- its subscription.
2163− liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
2164− let unsubscribeAll = destroy =<< readIORef parentsRef
2165−
2166− return (EventSubscription unsubscribeAll subscribed, occ)
2167−
2168−
2169−mergeInt :: forall x a. (HasSpiderTimeline x) => DynamicS x (PatchIntMap (Event x a)) -> Event x (IntMap a)
2170−mergeInt = cacheEvent . mergeIntCheap
2171−
2172−{-# INLINABLE mergeIntCheap #-}
2173−mergeIntCheap :: forall x a. (HasSpiderTimeline x) => DynamicS x (PatchIntMap (Event x a)) -> Event x (IntMap a)
2174−mergeIntCheap d = Event $ \sub -> do
2175− initialParents <- readBehaviorUntracked $ dynamicCurrent d
2176− accum <- liftIO $ FastMutableIntMap.newEmpty
2177− heightRef <- liftIO $ newIORef zeroHeight
2178− heightBagRef <- liftIO $ newIORef heightBagEmpty
2179− parents <- liftIO $ FastMutableIntMap.newEmpty
2180− changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2181− let subscribed = EventSubscribed
2182− { eventSubscribedHeightRef = heightRef
2183− , eventSubscribedRetained = toAny (parents, changeSubdRef)
2184−#ifdef DEBUG_CYCLES
2185− , eventSubscribedGetParents = fmap (_eventSubscription_subscribed . snd) <$> FastMutableIntMap.toList parents
2186− , eventSubscribedHasOwnHeightRef = False
2187− , eventSubscribedWhoCreated = whoCreatedIORef heightRef
2188−#endif
2189− }
2190− let scheduleSelf = do
2191− height <- liftIO $ readIORef $ heightRef
2192− scheduleMerge' height heightRef $ do
2193− vals <- liftIO $ FastMutableIntMap.getFrozenAndClear accum
2194− subscriberPropagate sub vals
2195− invalidateMyHeight = invalidateMergeHeight' heightRef sub
2196− recalculateMyHeight = do
2197− currentHeight <- readIORef heightRef
2198− when (currentHeight == invalidHeight) $ do --TODO: This will almost always be true; can we get rid of this check and just proceed to the next one always?
2199− heights <- readIORef heightBagRef
2200− numParents <- FastMutableIntMap.size parents
2201− case heightBagSize heights `compare` numParents of
2202− LT -> return ()
2203− EQ -> do
2204− let height = succHeight $ heightBagMax heights
2205− traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
2206− writeIORef heightRef $! height
2207− subscriberRecalculateHeight sub height
2208− GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show numParents <> ") for Merge"
2209− mySubscriber k = Subscriber
2210− { subscriberPropagate = \a -> do
2211− checkCycle subscribed
2212−
2213− wasEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
2214− liftIO $ FastMutableIntMap.insert accum k a
2215− when wasEmpty scheduleSelf
2216− , subscriberInvalidateHeight = \old -> do
2217− modifyIORef' heightBagRef $ heightBagRemove old
2218− invalidateMyHeight
2219− , subscriberRecalculateHeight = \new -> do
2220− modifyIORef' heightBagRef $ heightBagAdd new
2221− recalculateMyHeight
2222− }
2223− forM_ (IntMap.toList initialParents) $ \(k, p) -> do
2224− (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead p $ mySubscriber k
2225− liftIO $ do
2226− forM_ parentOcc $ FastMutableIntMap.insert accum k
2227− FastMutableIntMap.insert parents k subscription
2228− height <- getEventSubscribedHeight parentSubd
2229− if height == invalidHeight
2230− then writeIORef heightRef invalidHeight
2231− else do
2232− modifyIORef' heightBagRef $ heightBagAdd height
2233− modifyIORef' heightRef $ \oldHeight ->
2234− if oldHeight == invalidHeight
2235− then invalidHeight
2236− else max (succHeight height) oldHeight
2237− myHeight <- liftIO $ readIORef heightRef
2238− currentHeight <- getCurrentHeight
2239− isEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
2240− occ <- if currentHeight >= myHeight -- If we should have fired by now
2241− then if isEmpty
2242− then return Nothing
2243− else liftIO $ Just <$> FastMutableIntMap.getFrozenAndClear accum
2244− else do when (not isEmpty) scheduleSelf -- We have things accumulated, but we shouldn't have fired them yet
2245− return Nothing
2246− defer $ SomeMergeInit $ do
2247− let updateMe a = SomeMergeUpdate u invalidateMyHeight recalculateMyHeight
2248− where
2249− u = do
2250− let f k newParent = do
2251− subscription@(EventSubscription _ subd) <- subscribe newParent $ mySubscriber k
2252− newParentHeight <- liftIO $ getEventSubscribedHeight subd
2253− liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
2254− return subscription
2255− newSubscriptions <- FastMutableIntMap.traverseIntMapPatchWithKey f a
2256− oldParents <- liftIO $ FastMutableIntMap.applyPatch parents newSubscriptions
2257− liftIO $ for_ oldParents $ \oldParent -> do
2258− oldParentHeight <- getEventSubscribedHeight $ _eventSubscription_subscribed oldParent
2259−
2260− print ("updateMe", oldParentHeight)
2261− modifyIORef' heightBagRef $ heightBagRemove oldParentHeight
2262− return $ IntMap.elems oldParents
2263− let changeSubscriber = Subscriber
2264− { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
2265− tracePropagate (Proxy :: Proxy x) $ "SubscriberMergeInt/Change"
2266− defer $ updateMe a
2267− , subscriberInvalidateHeight = \_ -> return ()
2268− , subscriberRecalculateHeight = \_ -> return ()
2269− }
2270− (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) changeSubscriber
2271− forM_ change $ \c -> defer $ updateMe c
2272− -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
2273− -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
2274− -- its subscription.
2275− liftIO $ writeIORef changeSubdRef (changeSubscriber, changeSubscription)
2276− let unsubscribeAll = traverse_ unsubscribe =<< FastMutableIntMap.getFrozenAndClear parents
2277−
2278−
2279− return (EventSubscription unsubscribeAll subscribed, occ)
2280−
22811715newtype 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) }
22831716
2284−fanG :: (HasSpiderTimeline x, GCompare k) => Event x (DMap k v) -> EventSelectorG x k v
2285−fanG e = unsafePerformIO $ do
2286− ref <- newIORef Nothing
1717+fan :: GCompare k => Event x (DMap k Identity) -> EventSelector x k
1718+fan e =
22871719 let f = Fan
22881720 { fanParent = e
2289− , fanSubscribed = ref
1721+ , fanSubscribed = unsafeNewIORef e Nothing
22901722 }
2291− pure $ EventSelectorG $ \k -> eventFan k f
1723+ in EventSelector $ \k -> eventFan k f
22921724
2293−runHoldInits :: HasSpiderTimeline x => IORef [SomeHoldInit x] -> IORef [SomeDynInit x] -> IORef [SomeMergeInit x] -> EventM x ()
2294−runHoldInits holdInitRef dynInitRef mergeInitRef = do
1725+runHoldInits :: IORef [SomeHoldInit x] -> IORef [SomeMergeInit x] -> EventM x ()
1726+runHoldInits holdInitRef mergeInitRef = do
22951727 holdInits <- liftIO $ readIORef holdInitRef
2296− dynInits <- liftIO $ readIORef dynInitRef
22971728 mergeInits <- liftIO $ readIORef mergeInitRef
2298− unless (null holdInits && null dynInits && null mergeInits) $ do
1729+ unless (null holdInits && null mergeInits) $ do
22991730 liftIO $ writeIORef holdInitRef []
2300− liftIO $ writeIORef dynInitRef []
23011731 liftIO $ writeIORef mergeInitRef []
23021732 mapM_ initHold holdInits
2303− mapM_ initDyn dynInits
2304− mapM_ unSomeMergeInit mergeInits
2305− runHoldInits holdInitRef dynInitRef mergeInitRef
1733+ mapM_ initMerge mergeInits
1734+ runHoldInits holdInitRef mergeInitRef
23061735
2307−initHold :: HasSpiderTimeline x => SomeHoldInit x -> EventM x ()
1736+initHold :: SomeHoldInit x -> EventM x ()
23081737initHold (SomeHoldInit h) = void $ getHoldEventSubscription h
23091738
2310−initDyn :: HasSpiderTimeline x => SomeDynInit x -> EventM x ()
2311−initDyn (SomeDynInit d) = void $ getDynHold d
1739+initMerge :: SomeMergeInit x -> EventM x ()
1740+initMerge (SomeMergeInit subscribed changed) = do
1741+ changeSub <- liftIO $ newSubscriberMergeChange subscribed
1742+ EventSubscription _ changeSubd <- subscribe changed changeSub
1743+ change <- liftIO $ readEventSubscribed changeSubd
1744+ forM_ change $ \c -> defer $ SomeMergeUpdate c subscribed
1745+ liftIO $ writeIORef (mergeSubscribedChange subscribed) (changeSub, changeSubd)
23121746
2313−newEventEnv :: IO (EventEnv x)
2314−newEventEnv = do
1747+-- | Run an event action outside of a frame
1748+runFrame :: forall x a. EventM x a -> SpiderHost x a --TODO: This function also needs to hold the mutex
1749+runFrame a = SpiderHost $ ask >>= \spiderEnv -> lift $ do
1750+ -- Clear out pending unsubscriptions; these will need to happen eventually anyway, and might cause us a lot of extra work during the frame, so get rid of them now
1751+ pendingCleanups <- atomicModifyIORef (_spiderEnv_cleanups spiderEnv) $ \x -> ([], x)
1752+ {-# SCC "cleanups" #-} sequence_ pendingCleanups
23151753 toAssignRef <- newIORef [] -- This should only actually get used when events are firing
23161754 holdInitRef <- newIORef []
2317− dynInitRef <- newIORef []
23181755 mergeUpdateRef <- newIORef []
23191756 mergeInitRef <- newIORef []
23201757 heightRef <- newIORef zeroHeight
23211758 toClearRef <- newIORef []
2322− toClearIntRef <- newIORef []
23231759 toClearRootRef <- newIORef []
23241760 coincidenceInfosRef <- newIORef []
2325− delayedRef <- newIORef IntMap.empty
2326− return $ EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef
2327−
2328−clearEventEnv :: EventEnv x -> IO ()
2329−clearEventEnv (EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef) = do
2330− writeIORef toAssignRef []
2331− writeIORef holdInitRef []
2332− writeIORef dynInitRef []
2333− writeIORef mergeUpdateRef []
2334− writeIORef mergeInitRef []
2335− writeIORef heightRef zeroHeight
2336− writeIORef toClearRef []
2337− writeIORef toClearIntRef []
2338− writeIORef toClearRootRef []
2339− writeIORef coincidenceInfosRef []
2340− writeIORef delayedRef IntMap.empty
2341−
2342−-- | Run an event action outside of a frame
2343−runFrame :: forall x a. HasSpiderTimeline x => EventM x a -> SpiderHost x a --TODO: This function also needs to hold the mutex
2344−runFrame a = SpiderHost $ do
2345− let env = _spiderTimeline_eventEnv $ unSTE (spiderTimeline :: SpiderTimelineEnv x)
1761+ delayedRef <- liftIO $ newIORef IntMap.empty
1762+ let env = EventEnv spiderEnv toAssignRef holdInitRef mergeUpdateRef mergeInitRef toClearRef toClearRootRef heightRef coincidenceInfosRef delayedRef
23461763 let go = do
23471764 result <- a
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
1765+ runHoldInits holdInitRef mergeInitRef -- This must happen before doing the assignments, in case subscribing a Hold causes existing Holds to be read by the newly-propagated events
23491766 return result
2350− result <- runEventM go
2351− toClear <- readIORef $ eventEnvClears env
2352− forM_ toClear $ \(Some (Clear ref)) -> {-# SCC "clear" #-} writeIORef ref Nothing
2353− toClearInt <- readIORef $ eventEnvIntClears env
2354− forM_ toClearInt $ \(Some (IntClear ref)) -> {-# SCC "intClear" #-} writeIORef ref $! IntMap.empty
2355− toClearRoot <- readIORef $ eventEnvRootClears env
2356− forM_ toClearRoot $ \(Some (RootClear ref)) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
2357− toAssign <- readIORef $ eventEnvAssignments env
1767+ result <- runEventM go env
1768+ toClear <- readIORef toClearRef
1769+ forM_ toClear $ \(SomeClear ref) -> {-# SCC "clear" #-} writeIORef ref Nothing
1770+ toClearRoot <- readIORef toClearRootRef
1771+ forM_ toClearRoot $ \(SomeRootClear ref) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
1772+ toAssign <- readIORef toAssignRef
23581773 toReconnectRef <- newIORef []
2359− coincidenceInfos <- readIORef $ eventEnvResetCoincidences env
1774+ coincidenceInfos <- readIORef coincidenceInfosRef
23601775 forM_ toAssign $ \(SomeAssignment vRef iRef v) -> {-# SCC "assignment" #-} do
23611776 writeIORef vRef v
2362− traceInvalidate $ "Invalidating Hold"
1777+ when debugInvalidate $ putStrLn $ "Invalidating Hold"
23631778 writeIORef iRef =<< evaluate =<< invalidate toReconnectRef =<< readIORef iRef
2364− mergeUpdates <- readIORef $ eventEnvMergeUpdates env
2365− writeIORef (eventEnvMergeUpdates env) []
2366− tracePropagate (Proxy::Proxy x) $ "Updating merges"
2367− mergeSubscriptionsToKill <- runEventM $ concat <$> mapM _someMergeUpdate_update mergeUpdates
2368− tracePropagate (Proxy::Proxy x) $ "Updating merges done"
1779+ mergeUpdates <- readIORef mergeUpdateRef
1780+ writeIORef mergeUpdateRef []
1781+ let updateMerge :: SomeMergeUpdate x -> IO [SomeEventSubscription x]
1782+ updateMerge (SomeMergeUpdate (R.PatchDMap p :: R.PatchDMap (DMap k (Event x))) m) = do
1783+ oldParents <- readIORef $ mergeSubscribedParents m
1784+ let f (subscriptionsToKill, ps) (k :=> Compose me) = do
1785+ (mOldSubd, newPs) <- case me of
1786+ Nothing -> return $ DMap.updateLookupWithKey (\_ _ -> Nothing) k ps
1787+ Just e -> do
1788+ s <- liftIO $ newSubscriberMerge k m
1789+ subscription@(EventSubscription _ subd) <- subscribe e s
1790+ let newParent = MergeSubscribedParent subscription s
1791+ newParentHeight <- liftIO $ getEventSubscribedHeight subd
1792+ liftIO $ addMergeHeight newParentHeight m
1793+ return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
1794+ forM_ mOldSubd $ \oldSubd -> do
1795+ oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $ mergeSubscribedParentSubscription oldSubd
1796+ liftIO $ removeMergeHeight oldHeight m
1797+ return (maybeToList (SomeEventSubscription . mergeSubscribedParentSubscription <$> mOldSubd) ++ subscriptionsToKill, newPs)
1798+ (subscriptionsToKill, newParents) <- flip runEventM env $ foldM f ([], oldParents) $ DMap.toList p --TODO: I think this runEventM is OK, since no events are firing at this time, but it might not be
1799+ writeIORef (mergeSubscribedParents m) $! newParents
1800+ return subscriptionsToKill
1801+ when debugPropagate $ putStrLn "Updating merges"
1802+ mergeSubscriptionsToKill <- concat <$> mapM updateMerge mergeUpdates
1803+ when debugPropagate $ putStrLn "Updating merges done"
23691804 toReconnect <- readIORef toReconnectRef
2370− clearEventEnv env
23711805 switchSubscriptionsToKill <- forM toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
23721806 oldSubscription <- readIORef $ switchSubscribedCurrentParent subscribed
23731807 wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
2374− traceInvalidate $ "Finalizing invalidator for Switch" <> showNodeId subscribed
1808+ when debugInvalidate $ putStrLn $ "Finalizing invalidator for Switch" <> showNodeId subscribed
23751809 finalize wi
23761810 i <- evaluate $ switchSubscribedOwnInvalidator subscribed
23771811 wi' <- mkWeakPtrWithDebug i "wi'"
23781812 writeIORef (switchSubscribedOwnWeakInvalidator subscribed) $! wi'
23791813 writeIORef (switchSubscribedBehaviorParents subscribed) []
2380− writeIORef (eventEnvHoldInits env) [] --TODO: Should we reuse this?
2381− e <- runBehaviorM (readBehaviorTracked (switchSubscribedParent subscribed)) (Just (wi', switchSubscribedBehaviorParents subscribed)) $ eventEnvHoldInits env
2382− runEventM $ runHoldInits (eventEnvHoldInits env) (eventEnvDynInits env) (eventEnvMergeInits env) --TODO: Is this actually OK? It seems like it should be, since we know that no events are firing at this point, but it still seems inelegant
1814+ writeIORef holdInitRef [] --TODO: Should we reuse this?
1815+ e <- runBehaviorM (readBehaviorTracked (switchSubscribedParent subscribed)) (Just (wi', switchSubscribedBehaviorParents subscribed)) holdInitRef
1816+ runEventM (runHoldInits holdInitRef mergeInitRef) env --TODO: Is this actually OK? It seems like it should be, since we know that no events are firing at this point, but it still seems inelegant
23831817 --TODO: Make sure we touch the pieces of the SwitchSubscribed at the appropriate times
23841818 sub <- newSubscriberSwitch subscribed
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
1819+ subscription <- runReaderT (unSpiderHost (runFrame ({-# SCC "subscribeSwitch" #-} subscribe e sub))) spiderEnv --TODO: Assert that the event isn't firing --TODO: This should not loop because none of the events should be firing, but still, it is inefficient
23861820 {-
23871821 stackTrace <- liftIO $ fmap renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
2388− liftIO $ debugStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
1822+ liftIO $ putStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
23891823 EventRoot _ -> "EventRoot"
23901824 EventNever -> "EventNever"
23911825 _ -> "something else"
23921826 -}
23931827 writeIORef (switchSubscribedCurrentParent subscribed) $! subscription
2394− return oldSubscription
2395− liftIO $ mapM_ unsubscribe mergeSubscriptionsToKill
2396− liftIO $ mapM_ unsubscribe switchSubscriptionsToKill
1828+ return $ SomeEventSubscription oldSubscription
1829+ forM_ mergeSubscriptionsToKill $ \(SomeEventSubscription oldSubscription) -> liftIO $ unsubscribe oldSubscription
1830+ forM_ switchSubscriptionsToKill $ \(SomeEventSubscription oldSubscription) -> liftIO $ unsubscribe oldSubscription
23971831 forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
23981832 EventSubscription _ subd' <- readIORef $ switchSubscribedCurrentParent subscribed
23991833 parentHeight <- getEventSubscribedHeight subd'
24001834 myHeight <- readIORef $ switchSubscribedHeight subscribed
24011835 when (parentHeight /= myHeight) $ do
24021836 writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
2403− WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
2404− mapM_ _someMergeUpdate_invalidateHeight mergeUpdates --TODO: In addition to when the patch is completely empty, we should also not run this if it has some Nothing values, but none of them have actually had any effect; potentially, we could even check for Just values with no effect (e.g. by comparing their IORefs and ignoring them if they are unchanged); actually, we could just check if the new height is different
1837+ WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
1838+ forM_ mergeUpdates $ \(SomeMergeUpdate _ m) -> do
1839+ invalidateMergeHeight m --TODO: In addition to when the patch is completely empty, we should also not run this if it has some Nothing values, but none of them have actually had any effect; potentially, we could even check for Just values with no effect (e.g. by comparing their IORefs and ignoring them if they are unchanged); actually, we could just check if the new height is different
24051840 forM_ coincidenceInfos $ \(SomeResetCoincidence subscription mcs) -> do
24061841 unsubscribe subscription
24071842 mapM_ invalidateCoincidenceHeight mcs
24081843 forM_ coincidenceInfos $ \(SomeResetCoincidence _ mcs) -> mapM_ recalculateCoincidenceHeight mcs
2409− mapM_ _someMergeUpdate_recalculateHeight mergeUpdates
1844+ forM_ mergeUpdates $ \(SomeMergeUpdate _ m) -> revalidateMergeHeight m
24101845 forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> do
24111846 height <- calculateSwitchHeight subscribed
24121847 updateSwitchHeight height subscribed
@@ -2422,12 +1857,10 @@ zeroHeight = Height 0
24221857invalidHeight :: Height
24231858invalidHeight = Height (-1000)
24241859
2425−#ifdef DEBUG_CYCLES
24261860-- | An invalid height that is currently being traversed, e.g. by walkInvalidHeightParents
24271861{-# INLINE invalidHeightBeingTraversed #-}
24281862invalidHeightBeingTraversed :: Height
24291863invalidHeightBeingTraversed = Height (-1001)
2430−#endif
24311864
24321865{-# INLINE succHeight #-}
24331866succHeight :: Height -> Height
@@ -2436,12 +1869,50 @@ succHeight h@(Height a) =
24361869 then invalidHeight
24371870 else Height $ succ a
24381871
1872+removeMergeHeight :: Height -> MergeSubscribed x k -> IO ()
1873+removeMergeHeight oldParentHeight subscribed = do
1874+ when debugInvalidateHeight $ putStrLn $ "removeMergeHeight: " <> show oldParentHeight <> " Merge" <> showNodeId subscribed
1875+ oldHeights <- readIORef $ mergeSubscribedHeightBag subscribed
1876+ let newHeights = heightBagRemove oldParentHeight oldHeights
1877+ writeIORef (mergeSubscribedHeightBag subscribed) $! newHeights
1878+
1879+invalidateMergeHeight :: MergeSubscribed x k -> IO ()
1880+invalidateMergeHeight subscribed = do
1881+ oldHeight <- readIORef $ mergeSubscribedHeight subscribed
1882+ -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
1883+ when (oldHeight /= invalidHeight) $ do
1884+ writeIORef (mergeSubscribedHeight subscribed) $! invalidHeight
1885+ WeakBag.traverse (mergeSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1886+
1887+addMergeHeight :: Height -> MergeSubscribed x k -> IO ()
1888+addMergeHeight newParentHeight subscribed = do
1889+ when debugInvalidateHeight $ putStrLn $ "addMergeHeight: " <> show newParentHeight <> " Merge" <> showNodeId subscribed
1890+ oldHeights <- readIORef $ mergeSubscribedHeightBag subscribed
1891+ let newHeights = heightBagAdd newParentHeight oldHeights
1892+ writeIORef (mergeSubscribedHeightBag subscribed) $! newHeights
1893+
1894+revalidateMergeHeight :: MergeSubscribed x k -> IO ()
1895+revalidateMergeHeight subscribed = do
1896+ currentHeight <- readIORef $ mergeSubscribedHeight subscribed
1897+ when (currentHeight == invalidHeight) $ do -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
1898+ heights <- readIORef $ mergeSubscribedHeightBag subscribed
1899+ parents <- readIORef $ mergeSubscribedParents subscribed
1900+ -- When the number of heights in the bag reaches the number of parents, we should have a valid height
1901+ case heightBagSize heights `compare` DMap.size parents of
1902+ LT -> return ()
1903+ EQ -> do
1904+ let height = succHeight $ heightBagMax heights
1905+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
1906+ writeIORef (mergeSubscribedHeight subscribed) $! height
1907+ WeakBag.traverse (mergeSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
1908+ GT -> error $ "revalidateMergeHeight: more heights than parents for Merge" <> showNodeId subscribed
1909+
24391910invalidateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
24401911invalidateCoincidenceHeight subscribed = do
24411912 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
24421913 when (oldHeight /= invalidHeight) $ do
24431914 writeIORef (coincidenceSubscribedHeight subscribed) $! invalidHeight
2444− WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1915+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
24451916
24461917updateSwitchHeight :: Height -> SwitchSubscribed x a -> IO ()
24471918updateSwitchHeight new subscribed = do
@@ -2449,7 +1920,7 @@ updateSwitchHeight new subscribed = do
24491920 when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
24501921 when (new /= invalidHeight) $ do --TODO: This 'when' should probably be an assertion
24511922 writeIORef (switchSubscribedHeight subscribed) $! new
2452− WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
1923+ WeakBag.traverse (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
24531924
24541925recalculateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
24551926recalculateCoincidenceHeight subscribed = do
@@ -2458,7 +1929,7 @@ recalculateCoincidenceHeight subscribed = do
24581929 height <- calculateCoincidenceHeight subscribed
24591930 when (height /= invalidHeight) $ do
24601931 writeIORef (coincidenceSubscribedHeight subscribed) $! height
2461− WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
1932+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
24621933
24631934calculateSwitchHeight :: SwitchSubscribed x a -> IO Height
24641935calculateSwitchHeight subscribed = getEventSubscribedHeight . _eventSubscription_subscribed =<< readIORef (switchSubscribedCurrentParent subscribed)
@@ -2497,329 +1968,178 @@ invalidate toReconnectRef wis = do
24971968-- Reflex integration
24981969--------------------------------------------------------------------------------
24991970
2500−-- | Designates the default, global Spider timeline
2501−data SpiderTimeline x
2502−type role SpiderTimeline nominal
2503−
25041971-- | 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
1972+type Spider = SpiderEnv Global
25481973
1974+-- | Designates the default, global Spider timeline
1975+data Global
25491976
2550−instance HasSpiderTimeline x => Monad (Reflex.Class.Dynamic (SpiderTimeline x)) where
2551− {-# INLINE return #-}
2552− return = pure
2553− {-# INLINE (>>=) #-}
2554− x >>= f = SpiderDynamic $ dynamicDynIdentity $ newJoinDyn $ newMapDyn (unSpiderDynamic . f) $ unSpiderDynamic x
2555− {-# INLINE (>>) #-}
2556− (>>) = (*>)
2557−#if !MIN_VERSION_base(4,13,0)
2558− {-# INLINE fail #-}
2559− fail _ = error "Dynamic does not support 'fail'"
2560−#endif
1977+{-# NOINLINE globalSpiderEnv #-}
1978+globalSpiderEnv :: SpiderEnv Global
1979+globalSpiderEnv = unsafePerformIO unsafeNewSpiderEnv
25611980
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)
1981+-- | Stores all global data relevant to a particular Spider timeline; only one
1982+-- value should exist for each type @x@
1983+data SpiderEnv x = SpiderEnv
1984+ { _spiderEnv_toUnsubscribe :: !(IORef [SomeEventSubscription x])
1985+ , _spiderEnv_lock :: !(MVar ())
1986+ , _spiderEnv_cleanups :: !(IORef [IO ()])
1987+#ifdef DEBUG
1988+ , _spiderEnv_depth :: !(IORef Int)
25841989#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
1990+ }
1991+type role SpiderEnv nominal
27071992
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
1993+instance GEq SpiderEnv where
1994+ a `geq` b = if _spiderEnv_lock a == _spiderEnv_lock b
1995+ then Just $ unsafeCoerce Refl -- This unsafeCoerce is safe because the same SpiderEnv can't have two different 'x' arguments
1996+ else Nothing
27121997
2713−unsafeNewSpiderTimelineEnv :: forall x. IO (SpiderTimelineEnv x)
2714−unsafeNewSpiderTimelineEnv = do
1998+unsafeNewSpiderEnv :: forall x. IO (SpiderEnv x)
1999+unsafeNewSpiderEnv = do
2000+ toUnsubscribe <- newIORef []
27152001 lock <- newMVar ()
2716− env <- newEventEnv
2002+ cleanups <- newIORef []
27172003#ifdef DEBUG
27182004 depthRef <- newIORef 0
27192005#endif
2720− return $ STE $ SpiderTimelineEnv
2721− { _spiderTimeline_lock = lock
2722− , _spiderTimeline_eventEnv = env
2006+ return $ SpiderEnv
2007+ { _spiderEnv_toUnsubscribe = toUnsubscribe
2008+ , _spiderEnv_lock = lock
2009+ , _spiderEnv_cleanups = cleanups
27232010#ifdef DEBUG
2724− , _spiderTimeline_depth = depthRef
2011+ , _spiderEnv_depth = depthRef
27252012#endif
27262013 }
27272014
2728−-- | Create a new SpiderTimelineEnv
2729−newSpiderTimeline :: IO (Some SpiderTimelineEnv)
2730−newSpiderTimeline = withSpiderTimeline (pure . Some)
2015+-- | Create a new SpiderEnv
2016+newSpiderEnv :: IO (Some SpiderEnv)
2017+newSpiderEnv = Some.This <$> unsafeNewSpiderEnv
27312018
2732−data LocalSpiderTimeline (x :: Type) s
2019+newtype SpiderPullM x a = SpiderPullM (BehaviorM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
27332020
2734−instance Reifies s (SpiderTimelineEnv x) =>
2735− HasSpiderTimeline (LocalSpiderTimeline x s) where
2736− spiderTimeline = localSpiderTimeline Proxy $ reflect (Proxy :: Proxy s)
2021+newtype SpiderPushM x a = SpiderPushM (ComputeM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
27372022
2738−localSpiderTimeline
2739− :: proxy s
2740− -> SpiderTimelineEnv x
2741− -> SpiderTimelineEnv (LocalSpiderTimeline x s)
2742−localSpiderTimeline _ = coerce
2743−
2744−-- | Pass a new timeline to the given function.
2745−withSpiderTimeline :: (forall x. HasSpiderTimeline x => SpiderTimelineEnv x -> IO r) -> IO r
2746−withSpiderTimeline k = do
2747− env <- unsafeNewSpiderTimelineEnv
2748− reify env $ \s -> k $ localSpiderTimeline s env
2749−
2750−newtype SpiderPullM (x :: Type) a = SpiderPullM (BehaviorM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2751−
2752−type ComputeM = EventM
2753−
2754−newtype SpiderPushM (x :: Type) a = SpiderPushM (ComputeM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2755−
2756−instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
2757− {-# SPECIALIZE instance R.Reflex (SpiderTimeline Global) #-}
2758− newtype Behavior (SpiderTimeline x) a = SpiderBehavior { unSpiderBehavior :: Behavior x a }
2759− newtype Event (SpiderTimeline x) a = SpiderEvent { unSpiderEvent :: Event x a }
2760− newtype Dynamic (SpiderTimeline x) a = SpiderDynamic { unSpiderDynamic :: DynamicS x (Identity a) } -- deriving (Functor, Applicative, Monad)
2761− newtype Incremental (SpiderTimeline x) p = SpiderIncremental { unSpiderIncremental :: DynamicS x p }
2762− type PullM (SpiderTimeline x) = SpiderPullM x
2763− type PushM (SpiderTimeline x) = SpiderPushM x
2023+instance R.Reflex (SpiderEnv x) where
2024+ newtype Behavior (SpiderEnv x) a = SpiderBehavior { unSpiderBehavior :: Behavior x a }
2025+ newtype Event (SpiderEnv x) a = SpiderEvent { unSpiderEvent :: Event x a }
2026+ newtype Dynamic (SpiderEnv x) a = SpiderDynamic { unSpiderDynamic :: Dynamic x Identity a } deriving (Functor, Applicative, Monad)
2027+ newtype Incremental (SpiderEnv x) p a = SpiderIncremental { unSpiderIncremental :: Dynamic x p a }
2028+ type PullM (SpiderEnv x) = SpiderPullM x
2029+ type PushM (SpiderEnv x) = SpiderPushM x
27642030 {-# INLINABLE never #-}
27652031 never = SpiderEvent eventNever
27662032 {-# INLINABLE constant #-}
2767− constant = SpiderBehavior . behaviorConst
2768− {-# INLINE push #-}
2033+ constant = SpiderBehavior . BehaviorConst
2034+ {-# INLINABLE push #-}
27692035 push f = SpiderEvent . push (coerce f) . unSpiderEvent
2770− {-# INLINE pushCheap #-}
2771− pushCheap f = SpiderEvent . pushCheap (coerce f) . unSpiderEvent
27722036 {-# INLINABLE pull #-}
27732037 pull = SpiderBehavior . pull . coerce
2774− {-# INLINABLE fanG #-}
2775− fanG e = R.EventSelectorG $ SpiderEvent . selectG (fanG (unSpiderEvent e))
2776− {-# INLINABLE mergeG #-}
2777− mergeG
2778− :: forall k2 (k :: k2 -> *) q (v :: k2 -> *). GCompare k
2779− => (forall a. q a -> R.Event (SpiderTimeline x) (v a))
2780− -> DMap k q
2781− -> R.Event (SpiderTimeline x) (DMap k v)
2782− mergeG nt = SpiderEvent . mergeG (unSpiderEvent #. nt) . dynamicConst
2038+ {-# INLINABLE merge #-}
2039+ merge = SpiderEvent . merge . DynamicConst . (unsafeCoerce :: DMap k (R.Event (SpiderEnv x)) -> DMap k (Event x))
2040+ {-# INLINABLE fan #-}
2041+ fan e = R.EventSelector $ SpiderEvent . select (fan (unSpiderEvent e))
27832042 {-# INLINABLE switch #-}
2784− switch = SpiderEvent . switch . (coerce :: Behavior x (R.Event (SpiderTimeline x) a) -> Behavior x (Event x a)) . unSpiderBehavior
2043+ switch = SpiderEvent . switch . (unsafeCoerce :: Behavior x (R.Event (SpiderEnv x) a) -> Behavior x (Event x a)) . unSpiderBehavior
27852044 {-# INLINABLE coincidence #-}
2786− coincidence = SpiderEvent . coincidence . (coerce :: Event x (R.Event (SpiderTimeline x) a) -> Event x (Event x a)) . unSpiderEvent
2045+ coincidence = SpiderEvent . coincidence . (unsafeCoerce :: Event x (R.Event (SpiderEnv x) a) -> Event x (Event x a)) . unSpiderEvent
27872046 {-# INLINABLE current #-}
2788− current = SpiderBehavior . dynamicCurrent . unSpiderDynamic
2047+ current = SpiderBehavior . current . unSpiderDynamic
27892048 {-# INLINABLE updated #-}
2790− updated = SpiderEvent #. dynamicUpdated .# fmap coerce . unSpiderDynamic
2049+ updated = SpiderEvent . fmap runIdentity . updated . unSpiderDynamic
27912050 {-# INLINABLE unsafeBuildDynamic #-}
2792− unsafeBuildDynamic readV0 v' = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (coerce readV0) $ coerce $ unSpiderEvent v'
2051+ unsafeBuildDynamic readV0 v' = SpiderDynamic $ DynamicDynIdentity $ unsafeDyn (coerce readV0) $ addIdentity $ unSpiderEvent v'
27932052 {-# INLINABLE unsafeBuildIncremental #-}
2794− unsafeBuildIncremental readV0 dv = SpiderIncremental $ dynamicDyn $ unsafeBuildDynamic (coerce readV0) $ unSpiderEvent dv
2795− {-# INLINABLE mergeIncrementalG #-}
2796− mergeIncrementalG nt = SpiderEvent #. mergeG (coerce #. nt) .# unSpiderIncremental
2797− {-# INLINABLE mergeIncrementalWithMoveG #-}
2798− mergeIncrementalWithMoveG nt = SpiderEvent #. mergeWithMove (coerce #. nt) .# unSpiderIncremental
2053+ unsafeBuildIncremental readV0 dv = SpiderIncremental $ DynamicDyn $ unsafeDyn (coerce readV0) $ unSpiderEvent dv
2054+ {-# INLINABLE mergeIncremental #-}
2055+ mergeIncremental = SpiderEvent . merge . (unsafeCoerce :: Dynamic x R.PatchDMap (DMap k (R.Event (SpiderEnv x))) -> Dynamic x R.PatchDMap (DMap k (Event x))) . unSpiderIncremental
27992056 {-# INLINABLE currentIncremental #-}
2800− currentIncremental = SpiderBehavior . dynamicCurrent . unSpiderIncremental
2057+ currentIncremental = SpiderBehavior . current . unSpiderIncremental
28012058 {-# INLINABLE updatedIncremental #-}
2802− updatedIncremental = SpiderEvent . dynamicUpdated . unSpiderIncremental
2059+ updatedIncremental = SpiderEvent . updated . unSpiderIncremental
28032060 {-# INLINABLE incrementalToDynamic #-}
2804− incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (readBehaviorUntracked $ dynamicCurrent i) $ flip push (dynamicUpdated i) $ \p -> do
2805− c <- readBehaviorUntracked $ dynamicCurrent i
2806− return $ Identity <$> apply p c --TODO: Avoid the redundant 'apply'
2807− eventCoercion Coercion = Coercion
2808− behaviorCoercion Coercion = Coercion
2809− dynamicCoercion Coercion = Coercion
2810− incrementalCoercion Coercion Coercion = Coercion
2811− {-# INLINABLE mergeIntIncremental #-}
2812− mergeIntIncremental = SpiderEvent . mergeInt . coerce
2813− {-# INLINABLE fanInt #-}
2814− fanInt e = R.EventSelectorInt $ SpiderEvent . selectInt (fanInt (unSpiderEvent e))
2061+ incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ DynamicDynIdentity $ unsafeDyn (readBehaviorUntracked $ current i) $ flip push (updated i) $ \p -> do
2062+ c <- readBehaviorUntracked $ current i
2063+ return $ Identity <$> R.apply p c --TODO: Avoid the redundant 'apply'
2064+
2065+instance R.MonadSample (SpiderEnv x) (EventM x) where
2066+ {-# INLINABLE sample #-}
2067+ sample (SpiderBehavior b) = readBehaviorUntracked b
2068+
2069+instance R.MonadHold (SpiderEnv x) (EventM x) where
2070+ {-# INLINABLE hold #-}
2071+ hold = holdSpiderEventM
2072+ {-# INLINABLE holdDyn #-}
2073+ holdDyn = holdDynSpiderEventM
2074+ {-# INLINABLE holdIncremental #-}
2075+ holdIncremental = holdIncrementalSpiderEventM
2076+
2077+holdSpiderEventM :: a -> R.Event (SpiderEnv x) a -> EventM x (R.Behavior (SpiderEnv x) a)
2078+holdSpiderEventM v0 e = fmap (SpiderBehavior . BehaviorHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2079+
2080+holdDynSpiderEventM :: a -> R.Event (SpiderEnv x) a -> EventM x (R.Dynamic (SpiderEnv x) a)
2081+holdDynSpiderEventM v0 e = fmap (SpiderDynamic . DynamicHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2082+
2083+holdIncrementalSpiderEventM :: R.Patch p => a -> R.Event (SpiderEnv x) (p a) -> EventM x (R.Incremental (SpiderEnv x) p a)
2084+holdIncrementalSpiderEventM v0 e = fmap (SpiderIncremental . DynamicHold) $ hold v0 $ unSpiderEvent e
2085+
2086+instance R.MonadHold (SpiderEnv x) (SpiderHost x) where
2087+ {-# INLINABLE hold #-}
2088+ hold v0 e = R.runHostFrame $ R.hold v0 e
2089+ {-# INLINABLE holdDyn #-}
2090+ holdDyn v0 e = R.runHostFrame $ R.holdDyn v0 e
2091+ {-# INLINABLE holdIncremental #-}
2092+ holdIncremental v0 e = R.runHostFrame $ R.holdIncremental v0 e
2093+
2094+instance R.MonadSample (SpiderEnv x) (SpiderHost x) where
2095+ {-# INLINABLE sample #-}
2096+ sample = runFrame . readBehaviorUntracked . unSpiderBehavior
2097+
2098+instance R.MonadSample (SpiderEnv x) (SpiderPullM x) where
2099+ {-# INLINABLE sample #-}
2100+ sample = coerce . readBehaviorTracked . unSpiderBehavior
2101+
2102+instance R.MonadSample (SpiderEnv x) (SpiderPushM x) where
2103+ {-# INLINABLE sample #-}
2104+ sample (SpiderBehavior b) = SpiderPushM $ readBehaviorUntracked b
2105+
2106+instance R.MonadHold (SpiderEnv x) (SpiderPushM x) where
2107+ {-# INLINABLE hold #-}
2108+ hold v0 e = R.current <$> R.holdDyn v0 e
2109+ {-# INLINABLE holdDyn #-}
2110+ holdDyn v0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . DynamicHoldIdentity) $ hold v0 $ addIdentity e
2111+ {-# INLINABLE holdIncremental #-}
2112+ holdIncremental v0 (SpiderEvent e) = SpiderPushM $ SpiderIncremental . DynamicHold <$> hold v0 e
28152113
28162114data RootTrigger x a = forall k. GCompare k => RootTrigger (WeakBag (Subscriber x a), IORef (DMap k Identity), k a)
2115+newtype SpiderEventHandle x a = SpiderEventHandle { unSpiderEventHandle :: EventSubscription x a }
28172116
2818−data SpiderEventHandle x a = SpiderEventHandle
2819− { spiderEventHandleSubscription :: EventSubscription x
2820− , spiderEventHandleValue :: IORef (Maybe a)
2117+emptySubscriber :: Subscriber x a
2118+emptySubscriber = Subscriber
2119+ { subscriberPropagate = \_ -> return ()
2120+ , subscriberInvalidateHeight = \_ -> return ()
2121+ , subscriberRecalculateHeight = \_ -> return ()
28212122 }
28222123
2124+instance R.MonadSubscribeEvent (SpiderEnv x) (SpiderHostFrame x) where
2125+ {-# INLINABLE subscribeEvent #-}
2126+ subscribeEvent e = SpiderHostFrame $ do
2127+ subscription <- subscribe (unSpiderEvent e) emptySubscriber --TODO: Unsubscribe eventually (manually and/or with weak ref)
2128+ return $ SpiderEventHandle subscription
2129+
2130+instance R.ReflexHost (SpiderEnv x) where
2131+ type EventTrigger (SpiderEnv x) = RootTrigger x
2132+ type EventHandle (SpiderEnv x) = SpiderEventHandle x
2133+ type HostFrame (SpiderEnv x) = SpiderHostFrame x
2134+
2135+instance R.MonadReadEvent (SpiderEnv x) (ReadPhase x) where
2136+ {-# INLINABLE readEvent #-}
2137+ readEvent h = ReadPhase $ fmap (fmap return) $ liftIO $ do
2138+ let EventSubscription sln subscribed = unSpiderEventHandle h
2139+ result <- readEventSubscribed subscribed
2140+ touch sln
2141+ return result
2142+
28232143instance MonadRef (EventM x) where
28242144 type Ref (EventM x) = Ref IO
28252145 {-# INLINABLE newRef #-}
@@ -2834,7 +2154,7 @@ instance MonadAtomicRef (EventM x) where
28342154 atomicModifyRef r f = liftIO $ atomicModifyRef r f
28352155
28362156-- | The monad for actions that manipulate a Spider timeline identified by @x@
2837−newtype SpiderHost (x :: Type) a = SpiderHost { unSpiderHost :: IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2157+newtype SpiderHost x a = SpiderHost { unSpiderHost :: ReaderT (SpiderEnv x) IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
28382158
28392159instance Monad (SpiderHost x) where
28402160 {-# INLINABLE (>>=) #-}
@@ -2843,27 +2163,15 @@ instance Monad (SpiderHost x) where
28432163 SpiderHost x >> SpiderHost y = SpiderHost $ x >> y
28442164 {-# INLINABLE return #-}
28452165 return x = SpiderHost $ return x
2846−#if !MIN_VERSION_base(4,13,0)
28472166 {-# INLINABLE fail #-}
2848− fail = MonadFail.fail
2849−#endif
2850−
2851−instance MonadFail (SpiderHost x) where
2852− {-# INLINABLE fail #-}
2853− fail s = SpiderHost $ MonadFail.fail s
2167+ fail s = SpiderHost $ fail s
28542168
28552169-- | Run an action affecting the global Spider timeline; this will be guarded by
28562170-- a mutex for that timeline
28572171runSpiderHost :: SpiderHost Global a -> IO a
2858−runSpiderHost (SpiderHost a) = a
2859−
2860−-- | Run an action affecting a given Spider timeline; this will be guarded by a
2861−-- mutex for that timeline
2862−runSpiderHostForTimeline :: SpiderHost x a -> SpiderTimelineEnv x -> IO a
2863−runSpiderHostForTimeline (SpiderHost a) _ = a
2172+runSpiderHost (SpiderHost a) = runReaderT a globalSpiderEnv
28642173
2865−newtype SpiderHostFrame (x :: Type) a = SpiderHostFrame { runSpiderHostFrame :: EventM x a }
2866− deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2174+newtype SpiderHostFrame x a = SpiderHostFrame { runSpiderHostFrame :: EventM x a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
28672175
28682176instance Monad (SpiderHostFrame x) where
28692177 {-# INLINABLE (>>=) #-}
@@ -2872,21 +2180,30 @@ instance Monad (SpiderHostFrame x) where
28722180 SpiderHostFrame x >> SpiderHostFrame y = SpiderHostFrame $ x >> y
28732181 {-# INLINABLE return #-}
28742182 return x = SpiderHostFrame $ return x
2875−#if !MIN_VERSION_base(4,13,0)
28762183 {-# INLINABLE fail #-}
28772184 fail s = SpiderHostFrame $ fail s
2878−#endif
28792185
2880−instance NotReady (SpiderTimeline x) (SpiderHostFrame x) where
2881− notReadyUntil _ = pure ()
2882− notReady = pure ()
2186+instance R.MonadSample (SpiderEnv x) (SpiderHostFrame x) where
2187+ sample = SpiderHostFrame . readBehaviorUntracked . unSpiderBehavior --TODO: This can cause problems with laziness, so we should get rid of it if we can
2188+
2189+addIdentity :: Event x a -> Event x (Identity a)
2190+--addIdentity = fmap Identity
2191+addIdentity = unsafeCoerce
2192+
2193+instance R.MonadHold (SpiderEnv x) (SpiderHostFrame x) where
2194+ {-# INLINABLE hold #-}
2195+ hold v0 e = SpiderHostFrame $ fmap (SpiderBehavior . BehaviorHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2196+ {-# INLINABLE holdDyn #-}
2197+ holdDyn v0 e = SpiderHostFrame $ fmap (SpiderDynamic . DynamicHoldIdentity) $ hold v0 $ addIdentity $ unSpiderEvent e
2198+ {-# INLINABLE holdIncremental #-}
2199+ holdIncremental v0 e = SpiderHostFrame $ fmap (SpiderIncremental . DynamicHold) $ hold v0 $ unSpiderEvent e
28832200
2884−newEventWithTriggerIO :: forall x a. HasSpiderTimeline x => (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
2201+newEventWithTriggerIO :: (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
28852202newEventWithTriggerIO f = do
28862203 es <- newFanEventWithTriggerIO $ \Refl -> f
28872204 return $ select es Refl
28882205
2889−newFanEventWithTriggerIO :: (HasSpiderTimeline x, GCompare k) => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
2206+newFanEventWithTriggerIO :: GCompare k => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
28902207newFanEventWithTriggerIO f = do
28912208 occRef <- newIORef DMap.empty
28922209 subscribedRef <- newIORef DMap.empty
@@ -2897,8 +2214,46 @@ newFanEventWithTriggerIO f = do
28972214 }
28982215 return $ EventSelector $ \k -> eventRoot k r
28992216
2217+instance R.MonadReflexCreateTrigger (SpiderEnv x) (SpiderHost x) where
2218+ newEventWithTrigger = SpiderHost . lift . fmap SpiderEvent . newEventWithTriggerIO
2219+ newFanEventWithTrigger f = SpiderHost $ lift $ do
2220+ es <- newFanEventWithTriggerIO f
2221+ return $ R.EventSelector $ SpiderEvent . select es
2222+
2223+instance R.MonadReflexCreateTrigger (SpiderEnv x) (SpiderHostFrame x) where
2224+ newEventWithTrigger = SpiderHostFrame . EventM . liftIO . fmap SpiderEvent . newEventWithTriggerIO
2225+ newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
2226+ es <- newFanEventWithTriggerIO f
2227+ return $ R.EventSelector $ SpiderEvent . select es
2228+
2229+instance R.MonadSubscribeEvent (SpiderEnv x) (SpiderHost x) where
2230+ {-# INLINABLE subscribeEvent #-}
2231+ subscribeEvent = subscribeEventSpiderHost
2232+
2233+subscribeEventSpiderHost :: R.Event (SpiderEnv x) a -> SpiderHost x (R.EventHandle (SpiderEnv x) a)
2234+subscribeEventSpiderHost e = do
2235+ subscription <- runFrame $ subscribe (unSpiderEvent e) emptySubscriber --TODO: Unsubscribe eventually (manually and/or with weak ref)
2236+ return $ SpiderEventHandle subscription
2237+
29002238newtype ReadPhase x a = ReadPhase (ResultM x a) deriving (Functor, Applicative, Monad, MonadFix)
29012239
2240+instance R.MonadSample (SpiderEnv x) (ReadPhase x) where
2241+ {-# INLINABLE sample #-}
2242+ sample = ReadPhase . R.sample
2243+
2244+instance R.MonadHold (SpiderEnv x) (ReadPhase x) where
2245+ {-# INLINABLE hold #-}
2246+ hold v0 e = ReadPhase $ R.hold v0 e
2247+ {-# INLINABLE holdDyn #-}
2248+ holdDyn v0 e = ReadPhase $ R.holdDyn v0 e
2249+ {-# INLINABLE holdIncremental #-}
2250+ holdIncremental v0 e = ReadPhase $ R.holdIncremental v0 e
2251+
2252+instance R.MonadReflexHost (SpiderEnv x) (SpiderHost x) where
2253+ type ReadPhase (SpiderHost x) = ReadPhase x
2254+ fireEventsAndRead es (ReadPhase a) = run es a
2255+ runHostFrame = runFrame . runSpiderHostFrame
2256+
29022257instance MonadRef (SpiderHost x) where
29032258 type Ref (SpiderHost x) = Ref IO
29042259 newRef = SpiderHost . newRef
@@ -2916,15 +2271,3 @@ instance MonadRef (SpiderHostFrame x) where
29162271
29172272instance MonadAtomicRef (SpiderHostFrame x) where
29182273 atomicModifyRef r = SpiderHostFrame . atomicModifyRef r
2919−
2920−instance PrimMonad (SpiderHostFrame x) where
2921− type PrimState (SpiderHostFrame x) = PrimState IO
2922− primitive = SpiderHostFrame . EventM . primitive
2923−
2924−instance NotReady (SpiderTimeline x) (SpiderHost x) where
2925− notReadyUntil _ = return ()
2926− notReady = return ()
2927−
2928−instance HasSpiderTimeline x => NotReady (SpiderTimeline x) (PerformEventT (SpiderTimeline x) (SpiderHost x)) where
2929− notReadyUntil _ = return ()
2930− notReady = return ()