@@ -2,56 +2,46 @@
22{-# LANGUAGE CPP #-}
33{-# LANGUAGE ConstraintKinds #-}
44{-# LANGUAGE EmptyDataDecls #-}
5−{-# LANGUAGE ExistentialQuantification #-}
65{-# LANGUAGE FlexibleContexts #-}
76{-# LANGUAGE FlexibleInstances #-}
87{-# LANGUAGE FunctionalDependencies #-}
98{-# LANGUAGE GADTs #-}
109{-# LANGUAGE GeneralizedNewtypeDeriving #-}
1110{-# LANGUAGE LambdaCase #-}
11+{-# LANGUAGE MagicHash #-}
12+{-# LANGUAGE MultiParamTypeClasses #-}
13+{-# LANGUAGE MultiWayIf #-}
1214{-# LANGUAGE RankNTypes #-}
1315{-# LANGUAGE RoleAnnotations #-}
1416{-# LANGUAGE ScopedTypeVariables #-}
1517{-# LANGUAGE TypeFamilies #-}
1618{-# LANGUAGE TypeOperators #-}
1719{-# LANGUAGE UndecidableInstances #-}
18−{-# LANGUAGE PolyKinds #-}
19−{-# LANGUAGE DeriveFunctor #-}
20−{-# LANGUAGE StandaloneDeriving #-}
21−{-# LANGUAGE InstanceSigs #-}
22−{-# LANGUAGE MultiWayIf #-}
23−
2420#ifdef USE_REFLEX_OPTIMIZER
2521{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
2622#endif
27−{-# OPTIONS_GHC -Wunused-binds #-}
23+#ifdef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
24+{-# OPTIONS_GHC -fno-warn-orphans #-}
25+#endif
2826-- | This module is the implementation of the 'Spider' 'Reflex' engine. It uses
2927-- a graph traversal algorithm to propagate 'Event's and 'Behavior's.
30−module Reflex.Spider.Internal (module Reflex.Spider.Internal) where
28+module Reflex.Spider.Internal where
3129
32−#if MIN_VERSION_base(4,10,0)
33−import Control.Applicative (liftA2)
34−#endif
30+import Control.Applicative
3531import Control.Concurrent
3632import Control.Exception
37−import Control.Monad hiding (forM, forM_, mapM, mapM_)
33+import Control.Monad hiding (forM, forM_, mapM, mapM_, sequence)
3834import Control.Monad.Exception
39−import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_)
35+import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_, sequence)
4036import Control.Monad.Primitive
41−import Control.Monad.Reader.Class
42−import Control.Monad.IO.Class
43−import Control.Monad.ReaderIO
37+import Control.Monad.Reader hiding (forM, forM_, mapM, mapM_, sequence)
4438import Control.Monad.Ref
45−import Control.Monad.Fail (MonadFail)
46−import qualified Control.Monad.Fail as MonadFail
4739import Data.Align
4840import Data.Coerce
49−import Data.Dependent.Map (DMap)
41+import Data.Dependent.Map (DMap, DSum (..))
5042import 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
5443import Data.Foldable hiding (concat, elem, sequence_)
44+import Data.Function
5545import Data.Functor.Constant
5646import Data.Functor.Misc
5747import Data.Functor.Product
@@ -59,75 +49,44 @@ import Data.GADT.Compare
5949import Data.IntMap.Strict (IntMap)
6050import qualified Data.IntMap.Strict as IntMap
6151import Data.IORef
62−import Data.Kind (Type)
63−import Data.Maybe hiding (mapMaybe)
64−import Data.Monoid (mempty, (<>))
52+import Data.List hiding (foldl')
53+import Data.Maybe
54+import Data.Monoid ((<>))
6555import Data.Proxy
6656import Data.These
6757import Data.Traversable
68−import Data.Type.Equality ((:~:)(Refl))
69−import Data.Witherable (Filterable, mapMaybe)
70−import GHC.Exts hiding (toList)
58+import Data.Word
59+import GHC.Exts
7160import GHC.IORef (IORef (..))
7261import GHC.Stack
73−import Reflex.FastWeak
62+import Reflex.FunctorMaybe
7463import System.IO.Unsafe
7564import System.Mem.Weak
7665import Unsafe.Coerce
7766
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−
8767#ifdef DEBUG_CYCLES
8868import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
89−#endif
90−
9169import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
9270import qualified Data.List.NonEmpty as NonEmpty
71+import Data.Monoid (mempty)
9372import Data.Tree (Forest, Tree (..), drawForest)
94−import Data.List (isPrefixOf)
95−
96−import Data.FastWeakBag (FastWeakBag, FastWeakBagTicket)
97−import qualified Data.FastWeakBag as FastWeakBag
73+#endif
9874
75+import Data.WeakBag (WeakBag, WeakBagTicket)
76+import qualified Data.WeakBag as WeakBag
77+#ifndef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
9978import Data.Reflection
100−import Data.Some (Some(Some))
79+import Data.Some (Some)
80+import qualified Data.Some as Some
10181import Data.Type.Coercion
102−import Data.Profunctor.Unsafe ((#.), (.#))
103−import Data.WeakBag (WeakBag, WeakBagTicket, _weakBag_children)
104−import qualified Data.WeakBag as WeakBag
10582import qualified Reflex.Class
10683import qualified Reflex.Class as R
10784import 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)
11785#endif
86+import Reflex.Patch
11887
119−-- TODO stdout might not be the best channel for debug output
120−debugStrLn :: String -> IO ()
121−debugStrLn = putStrLn
122−
123−#ifdef DEBUG_TRACE_EVENTS
124−withStackOneLine :: (BS8.ByteString -> a) -> a
125−withStackOneLine expr = unsafePerformIO $ do
126− stack <- currentCallStack
127− return (expr . BS8.pack . unwords . dropInternal . reverse $ stack)
128− where dropInternal = filterStack "Reflex.Spider.Internal"
129−
130−#endif
88+-- Note: must come last to silence warnings due to AMP on GHC < 7.10
89+import Prelude hiding (any, concat, mapM, mapM_, sequence)
13190
13291debugPropagate :: Bool
13392
@@ -136,42 +95,28 @@ debugInvalidateHeight :: Bool
13695debugInvalidate :: Bool
13796
13897#ifdef DEBUG
98+
13999#define DEBUG_NODEIDS
140100
141−#ifdef DEBUG_TRACE_PROPAGATION
142101debugPropagate = True
143−#else
144−debugPropagate = False
145−#endif
146102
147−#ifdef DEBUG_TRACE_HEIGHT
148−debugInvalidateHeight = True
149−#else
150103debugInvalidateHeight = False
151−#endif
152104
153−#ifdef DEBUG_TRACE_INVALIDATION
154105debugInvalidate = True
155−#else
156−debugInvalidate = False
157−#endif
158106
159107class HasNodeId a where
160108 getNodeId :: a -> Int
161109
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
110+instance HasNodeId (Hold x p a) where
169111 getNodeId = holdNodeId
170112
113+instance HasNodeId (PushSubscribed x a b) where
114+ getNodeId = pushSubscribedNodeId
115+
171116instance HasNodeId (SwitchSubscribed x a) where
172117 getNodeId = switchSubscribedNodeId
173118
174−instance HasNodeId (FanSubscribed x v a) where
119+instance HasNodeId (FanSubscribed x a) where
175120 getNodeId = fanSubscribedNodeId
176121
177122instance HasNodeId (CoincidenceSubscribed x a) where
@@ -185,16 +130,41 @@ instance HasNodeId (Pull x a) where
185130
186131{-# INLINE showNodeId #-}
187132showNodeId :: HasNodeId a => a -> String
188−showNodeId = showNodeId' . getNodeId
189−
190−showNodeId' :: Int -> String
191−showNodeId' = ("#"<>) . show
192−
133+showNodeId = ("#"<>) . show . getNodeId
134+
135+showSubscriberType :: Subscriber x a -> String
136+showSubscriberType = \case
137+ SubscriberPush _ _ -> "SubscriberPush"
138+ SubscriberMerge _ _ -> "SubscriberMerge"
139+ SubscriberFan _ -> "SubscriberFan"
140+ SubscriberMergeChange _ -> "SubscriberMergeChange"
141+ SubscriberHold _ -> "SubscriberHold"
142+ SubscriberHoldIdentity _ -> "SubscriberHoldIdentity"
143+ SubscriberSwitch _ -> "SubscriberSwitch"
144+ SubscriberCoincidenceOuter _ -> "SubscriberCoincidenceOuter"
145+ SubscriberCoincidenceInner _ -> "SubscriberCoincidenceInner"
146+ SubscriberHandle -> "SubscriberHandle"
147+
148+showEventType :: Event x a -> String
149+showEventType = \case
150+ EventRoot _ _ -> "EventRoot"
151+ EventNever -> "EventNever"
152+ EventPush _ -> "EventPush"
153+ EventMerge _ -> "EventMerge"
154+ EventFan _ _ -> "EventFan"
155+ EventSwitch _ -> "EventSwitch"
156+ EventCoincidence _ -> "EventCoincidence"
157+ EventHold _ -> "EventHold"
158+ EventDyn _ -> "EventDyn"
159+ EventHoldIdentity _ -> "EventHoldIdentity"
160+ EventDynIdentity _ -> "EventDynIdentity"
193161
194162#else
195163
196164debugPropagate = False
165+
197166debugInvalidateHeight = False
167+
198168debugInvalidate = False
199169
200170-- This must be inline, or error messages will cause memory leaks due to retaining the node in question
@@ -202,10 +172,6 @@ debugInvalidate = False
202172showNodeId :: a -> String
203173showNodeId _ = ""
204174
205−{-# INLINE showNodeId' #-}
206−showNodeId' :: Int -> String
207−showNodeId' _ = ""
208−
209175#endif
210176
211177#ifdef DEBUG_NODEIDS
@@ -215,21 +181,13 @@ nextNodeIdRef = unsafePerformIO $ newIORef 1
215181
216182newNodeId :: IO Int
217183newNodeId = atomicModifyIORef' nextNodeIdRef $ \n -> (succ n, n)
218−#endif
219184
220−--------------------------------------------------------------------------------
221−-- EventSubscription
222−--------------------------------------------------------------------------------
223−
224−--NB: Once you subscribe to an Event, you must always hold on the the WHOLE EventSubscription you get back
225−-- If you do not retain the subscription, you may be prematurely unsubscribed from the parent event.
226−data EventSubscription x = EventSubscription
227− { _eventSubscription_unsubscribe :: !(IO ())
228− , _eventSubscription_subscribed :: {-# UNPACK #-} !(EventSubscribed x)
229− }
230−
231−unsubscribe :: EventSubscription x -> IO ()
232−unsubscribe (EventSubscription u _) = u
185+{-# NOINLINE unsafeNodeId #-}
186+unsafeNodeId :: a -> Int
187+unsafeNodeId a = unsafePerformIO $ do
188+ touch a
189+ newNodeId
190+#endif
233191
234192--------------------------------------------------------------------------------
235193-- Event
@@ -250,165 +208,76 @@ subscribeAndRead = unEvent
250208-- | Construct an 'Event' equivalent to that constructed by 'push', but with no
251209-- caching; if the computation function is very cheap, this is (much) more
252210-- efficient than 'push'
253−{-# INLINE [1] pushCheap #-}
211+{-# NOINLINE pushCheap #-}
254212pushCheap :: 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
213+pushCheap f e = Event $ \sub -> do
214+ (subscription, occ) <- subscribeAndRead e $ sub
257215 { subscriberPropagate = \a -> do
258− mb <- f a
216+ mb <- runComputeM $ f a
259217 mapM_ (subscriberPropagate sub) mb
260218 }
261− occ' <- join <$> mapM f occ
219+ occ' <- join <$> mapM (runComputeM . f) occ
262220 return (subscription, occ')
263221
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−
301222data CacheSubscribed x a
302− = CacheSubscribed { _cacheSubscribed_subscribers :: {-# UNPACK #-} !(FastWeakBag (Subscriber x a))
223+ = CacheSubscribed { _cacheSubscribed_subscribers :: {-# UNPACK #-} !(WeakBag (Subscriber x a))
224+ , _cacheSubscribed_weakSelf :: {-# UNPACK #-} !(IORef (Weak (CacheSubscribed x a)))
303225 , _cacheSubscribed_parent :: {-# UNPACK #-} !(EventSubscription x)
226+ , _cacheSubscribed_cached :: {-# UNPACK #-} !(IORef (Maybe (CacheSubscribed x a)))
304227 , _cacheSubscribed_occurrence :: {-# UNPACK #-} !(IORef (Maybe a))
305−#ifdef DEBUG_NODEIDS
306− , _cacheSubscribed_nodeId :: {-# UNPACK #-} !Int
307−#endif
308228 }
309229
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−
325230-- | Construct an 'Event' whose value is guaranteed not to be recomputed
326231-- repeatedly
327232--
328233--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
234+--there's only one subscriber, and then build our own WeakBag only when a second
330235--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− }
236+{-# NOINLINE cacheEvent #-}
237+cacheEvent :: HasSpiderTimeline x => Event x a -> Event x a
238+cacheEvent e = Event $ \sub -> {-# SCC "cacheEvent" #-} do
239+ let !mSubscribedRef = unsafeNewIORef e Nothing
240+ mSubscribed <- liftIO $ readIORef mSubscribedRef
241+ case mSubscribed of
242+ Just subscribed -> liftIO $ do
243+ ticket <- WeakBag.insert sub (_cacheSubscribed_subscribers subscribed) (_cacheSubscribed_weakSelf subscribed) cleanupCacheSubscribed
244+ occ <- readIORef $ _cacheSubscribed_occurrence subscribed
245+ let es = EventSubscribed
246+ { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ _cacheSubscribed_parent subscribed
247+ , eventSubscribedRetained = toAny subscribed
248+ }
249+ return (EventSubscription (WeakBag.remove ticket >> touch ticket) es, occ)
250+ Nothing -> do
251+ weakSelf <- liftIO $ newIORef $ error "cacheEvent: weakSelf not yet intialized"
252+ (subscribers, ticket) <- liftIO $ WeakBag.singleton sub weakSelf cleanupCacheSubscribed
253+ occRef <- liftIO $ newIORef undefined
254+ (parentSub, occ) <- subscribeAndRead e $ Subscriber
255+ { subscriberPropagate = \a -> do
256+ liftIO $ writeIORef occRef $ Just a
257+ scheduleClear occRef
258+ propagate a subscribers
259+ , subscriberInvalidateHeight = \old -> do
260+ WeakBag.traverse subscribers $ invalidateSubscriberHeight old
261+ , subscriberRecalculateHeight = \new -> do
262+ WeakBag.traverse subscribers $ recalculateSubscriberHeight new
409263 }
410− return (es, occ)
264+ liftIO $ writeIORef occRef occ
265+ when (isJust occ) $ scheduleClear occRef
266+ let !subscribed = CacheSubscribed
267+ { _cacheSubscribed_subscribers = subscribers
268+ , _cacheSubscribed_weakSelf = weakSelf
269+ , _cacheSubscribed_parent = parentSub
270+ , _cacheSubscribed_cached = mSubscribedRef
271+ , _cacheSubscribed_occurrence = occRef
272+ }
273+ liftIO $ writeIORef mSubscribedRef $ Just subscribed
274+ liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "PushSubscribed"
275+ return (EventSubscription (WeakBag.remove ticket >> touch ticket) (EventSubscribed (eventSubscribedHeightRef $ _eventSubscription_subscribed parentSub) (toAny subscribed)), occ)
411276
277+cleanupCacheSubscribed :: CacheSubscribed x a -> IO ()
278+cleanupCacheSubscribed self = do
279+ unsubscribe $ _cacheSubscribed_parent self
280+ writeIORef (_cacheSubscribed_cached self) Nothing
412281
413282subscribe :: Event x a -> Subscriber x a -> EventM x (EventSubscription x)
414283subscribe e s = fst <$> subscribeAndRead e s
@@ -420,16 +289,13 @@ wrap tag getSpecificSubscribed sub = do
420289 let es = tag subd
421290 return (EventSubscription (WeakBag.remove sln >> touch sln) es, occ)
422291
423−eventRoot :: (GCompare k, HasSpiderTimeline x) => k a -> Root x k -> Event x a
292+eventRoot :: GCompare k => k a -> Root x k -> Event x a
424293eventRoot !k !r = Event $ wrap eventSubscribedRoot $ liftIO . getRootSubscribed k r
425294
426−subscribeAndReadNever :: EventM x (EventSubscription x, Maybe a)
427−subscribeAndReadNever = return (EventSubscription (return ()) eventSubscribedNever, Nothing)
428−
429295eventNever :: Event x a
430−eventNever = Event $ const subscribeAndReadNever
296+eventNever = Event $ \_ -> return (EventSubscription (return ()) eventSubscribedNever, Nothing)
431297
432−eventFan :: (GCompare k, HasSpiderTimeline x) => k a -> Fan x k v -> Event x (v a)
298+eventFan :: (GCompare k, HasSpiderTimeline x) => k a -> Fan x k -> Event x a
433299eventFan !k !f = Event $ wrap eventSubscribedFan $ getFanSubscribed k f
434300
435301eventSwitch :: HasSpiderTimeline x => Switch x a -> Event x a
@@ -438,14 +304,14 @@ eventSwitch !s = Event $ wrap eventSubscribedSwitch $ getSwitchSubscribed s
438304eventCoincidence :: HasSpiderTimeline x => Coincidence x a -> Event x a
439305eventCoincidence !c = Event $ wrap eventSubscribedCoincidence $ getCoincidenceSubscribed c
440306
441−eventHold :: Hold x p -> Event x p
307+eventHold :: HasSpiderTimeline x => Hold x p -> Event x p
442308eventHold !h = Event $ subscribeHoldEvent h
443309
444310eventDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> Event x p
445311eventDyn !j = Event $ \sub -> getDynHold j >>= \h -> subscribeHoldEvent h sub
446312
447313{-# INLINE subscribeCoincidenceInner #-}
448−subscribeCoincidenceInner :: HasSpiderTimeline x => Event x a -> Height -> CoincidenceSubscribed x a -> EventM x (Maybe a, Height, EventSubscribed x)
314+subscribeCoincidenceInner :: CanSubscribe x m => Event x a -> Height -> CoincidenceSubscribed x a -> m (Maybe a, Height, EventSubscribed x)
449315subscribeCoincidenceInner inner outerHeight subscribedUnsafe = do
450316 subInner <- liftIO $ newSubscriberCoincidenceInner subscribedUnsafe
451317 (subscription@(EventSubscription _ innerSubd), innerOcc) <- subscribeAndRead inner subInner
@@ -464,6 +330,16 @@ data Subscriber x a = Subscriber
464330 , subscriberRecalculateHeight :: !(Height -> IO ())
465331 }
466332
333+--TODO: Move this comment to WeakBag
334+-- These function are constructor functions that are marked NOINLINE so they are
335+-- opaque to GHC. If we do not do this, then GHC will sometimes fuse the constructor away
336+-- so any weak references that are attached to the constructors will have their
337+-- finalizer run. Using the opaque constructor, does not see the
338+-- constructor application, so it behaves like an IORef and cannot be fused away.
339+--
340+-- The result is also evaluated to WHNF, since forcing a thunk invalidates
341+-- the weak pointer to it in some cases.
342+
467343newSubscriberHold :: (HasSpiderTimeline x, Patch p) => Hold x p -> IO (Subscriber x p)
468344newSubscriberHold h = return $ Subscriber
469345 { subscriberPropagate = {-# SCC "traverseHold" #-} propagateSubscriberHold h
@@ -471,68 +347,85 @@ newSubscriberHold h = return $ Subscriber
471347 , subscriberRecalculateHeight = \_ -> return ()
472348 }
473349
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
350+newSubscriberFan :: forall x k. (HasSpiderTimeline x, GCompare k) => FanSubscribed x k -> IO (Subscriber x (DMap k Identity))
351+newSubscriberFan subscribed = return $ Subscriber
476352 { subscriberPropagate = \a -> {-# SCC "traverseFan" #-} do
477353 subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
478− tracePropagate (Proxy :: Proxy x) $ show (DMap.size subs) <> " keys subscribed, " <> show (DMap.size a) <> " keys firing"
354+ tracePropagate (Proxy :: Proxy x) $ "SubscriberFan" <> showNodeId subscribed <> ": " ++ show (DMap.size subs) ++ " keys subscribed, " ++ show (DMap.size a) ++ " keys firing"
479355 liftIO $ writeIORef (fanSubscribedOccurrence subscribed) $ Just a
480356 scheduleClear $ fanSubscribedOccurrence subscribed
481− let f _ (Pair v subsubs) = do
357+ let f _ (Pair (Identity v) subsubs) = do
482358 propagate v $ _fanSubscribedChildren_list subsubs
483359 return $ Constant ()
484360 _ <- DMap.traverseWithKey f $ DMap.intersectionWithKey (\_ -> Pair) a subs --TODO: Would be nice to have DMap.traverse_
485361 return ()
486362 , subscriberInvalidateHeight = \old -> do
363+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
487364 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
488− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
365+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
366+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
489367 , subscriberRecalculateHeight = \new -> do
368+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
490369 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
491− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse_ (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
370+ forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
371+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
492372 }
493373
494374newSubscriberSwitch :: forall x a. HasSpiderTimeline x => SwitchSubscribed x a -> IO (Subscriber x a)
495−newSubscriberSwitch subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
375+newSubscriberSwitch subscribed = return $ Subscriber
496376 { subscriberPropagate = \a -> {-# SCC "traverseSwitch" #-} do
377+ tracePropagate (Proxy :: Proxy x) $ "SubscriberSwitch" <> showNodeId subscribed
497378 liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
498379 scheduleClear $ switchSubscribedOccurrence subscribed
499380 propagate a $ switchSubscribedSubscribers subscribed
500381 , subscriberInvalidateHeight = \_ -> do
382+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
501383 oldHeight <- readIORef $ switchSubscribedHeight subscribed
502384 when (oldHeight /= invalidHeight) $ do
503385 writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
504− WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
505− , subscriberRecalculateHeight = (`updateSwitchHeight` subscribed)
506− }
386+ WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
387+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
388+ , subscriberRecalculateHeight = \new -> do
389+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
390+ updateSwitchHeight new subscribed
391+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
392+ }
507393
508394newSubscriberCoincidenceOuter :: forall x b. HasSpiderTimeline x => CoincidenceSubscribed x b -> IO (Subscriber x (Event x b))
509−newSubscriberCoincidenceOuter subscribed = debugSubscriber ("SubscriberCoincidenceOuter" <> showNodeId subscribed) $ Subscriber
395+newSubscriberCoincidenceOuter subscribed = return $ Subscriber
510396 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceOuter" #-} do
397+ tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
511398 outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
512399 tracePropagate (Proxy :: Proxy x) $ " outerHeight = " <> show outerHeight
513400 (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
514401 tracePropagate (Proxy :: Proxy x) $ " isJust occ = " <> show (isJust occ)
515402 tracePropagate (Proxy :: Proxy x) $ " innerHeight = " <> show innerHeight
516−
517403 liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
518404 scheduleClear $ coincidenceSubscribedInnerParent subscribed
519405 case occ of
520− Nothing ->
406+ Nothing -> do
521407 when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
522408 writeIORef (coincidenceSubscribedHeight subscribed) $! innerHeight
523− WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
524− WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
409+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
410+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
525411 Just o -> do -- Since it's already firing, no need to adjust height
526412 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
527413 scheduleClear $ coincidenceSubscribedOccurrence subscribed
528414 propagate o $ coincidenceSubscribedSubscribers subscribed
529− , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
530− , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
415+ , subscriberInvalidateHeight = \_ -> do
416+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
417+ invalidateCoincidenceHeight subscribed
418+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
419+ , subscriberRecalculateHeight = \_ -> do
420+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
421+ recalculateCoincidenceHeight subscribed
422+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
531423 }
532424
533425newSubscriberCoincidenceInner :: forall x a. HasSpiderTimeline x => CoincidenceSubscribed x a -> IO (Subscriber x a)
534−newSubscriberCoincidenceInner subscribed = debugSubscriber ("SubscriberCoincidenceInner" <> showNodeId subscribed) $ Subscriber
426+newSubscriberCoincidenceInner subscribed = return $ Subscriber
535427 { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceInner" #-} do
428+ tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceInner" <> showNodeId subscribed
536429 occ <- liftIO $ readIORef $ coincidenceSubscribedOccurrence subscribed
537430 case occ of
538431 Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
@@ -540,8 +433,14 @@ newSubscriberCoincidenceInner subscribed = debugSubscriber ("SubscriberCoinciden
540433 liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
541434 scheduleClear $ coincidenceSubscribedOccurrence subscribed
542435 propagate a $ coincidenceSubscribedSubscribers subscribed
543− , subscriberInvalidateHeight = \_ -> invalidateCoincidenceHeight subscribed
544− , subscriberRecalculateHeight = \_ -> recalculateCoincidenceHeight subscribed
436+ , subscriberInvalidateHeight = \_ -> do
437+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
438+ invalidateCoincidenceHeight subscribed
439+ when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
440+ , subscriberRecalculateHeight = \_ -> do
441+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
442+ recalculateCoincidenceHeight subscribed
443+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
545444 }
546445
547446invalidateSubscriberHeight :: Height -> Subscriber x a -> IO ()
@@ -551,18 +450,11 @@ recalculateSubscriberHeight :: Height -> Subscriber x a -> IO ()
551450recalculateSubscriberHeight = flip subscriberRecalculateHeight
552451
553452-- | 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) $
453+propagate :: a -> WeakBag (Subscriber x a) -> EventM x ()
454+propagate a subscribers = withIncreasedDepth $ do
556455 -- 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
557456 --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
558− WeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
559−
560−-- | Propagate everything at the current height
561−propagateFast :: forall x a. HasSpiderTimeline x => a -> FastWeakBag (Subscriber x a) -> EventM x ()
562−propagateFast a subscribers = withIncreasedDepth (Proxy::Proxy x) $
563− -- Note: in the following traversal, we do not visit nodes that are added to the list during our traversal; they are new events, which will necessarily have full information already, so there is no need to traverse them
564− --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
565− FastWeakBag.traverse_ subscribers $ \s -> subscriberPropagate s a
457+ WeakBag.traverse subscribers $ \s -> subscriberPropagate s a
566458
567459--------------------------------------------------------------------------------
568460-- EventSubscribed
@@ -571,16 +463,11 @@ propagateFast a subscribers = withIncreasedDepth (Proxy::Proxy x) $
571463toAny :: a -> Any
572464toAny = unsafeCoerce
573465
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.
579466data EventSubscribed x = EventSubscribed
580467 { eventSubscribedHeightRef :: {-# UNPACK #-} !(IORef Height)
581468 , eventSubscribedRetained :: {-# NOUNPACK #-} !Any
582469#ifdef DEBUG_CYCLES
583− , eventSubscribedGetParents :: !(IO [EventSubscribed x]) -- For debugging loops
470+ , eventSubscribedGetParents :: !(IO [Some (EventSubscribed x)]) -- For debugging loops
584471 , eventSubscribedHasOwnHeightRef :: !Bool
585472 , eventSubscribedWhoCreated :: !(IO [String])
586473#endif
@@ -607,23 +494,13 @@ eventSubscribedNever = EventSubscribed
607494 , eventSubscribedWhoCreated = return ["never"]
608495#endif
609496 }
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− }
620497
621−eventSubscribedFan :: FanSubscribed x k v -> EventSubscribed x
498+eventSubscribedFan :: FanSubscribed x k -> EventSubscribed x
622499eventSubscribedFan !subscribed = EventSubscribed
623500 { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
624501 , eventSubscribedRetained = toAny subscribed
625502#ifdef DEBUG_CYCLES
626− , eventSubscribedGetParents = return [_eventSubscription_subscribed $ fanSubscribedParent subscribed]
503+ , eventSubscribedGetParents = return [Some.This $ _eventSubscription_subscribed $ fanSubscribedParent subscribed]
627504 , eventSubscribedHasOwnHeightRef = False
628505 , eventSubscribedWhoCreated = whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
629506#endif
@@ -636,7 +513,7 @@ eventSubscribedSwitch !subscribed = EventSubscribed
636513#ifdef DEBUG_CYCLES
637514 , eventSubscribedGetParents = do
638515 s <- readIORef $ switchSubscribedCurrentParent subscribed
639− return [_eventSubscription_subscribed s]
516+ return [Some.This $ _eventSubscription_subscribed s]
640517 , eventSubscribedHasOwnHeightRef = True
641518 , eventSubscribedWhoCreated = whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
642519#endif
@@ -649,8 +526,8 @@ eventSubscribedCoincidence !subscribed = EventSubscribed
649526#ifdef DEBUG_CYCLES
650527 , eventSubscribedGetParents = do
651528 innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
652− let outerParent = _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
653− innerParents = maybeToList $ innerSubscription
529+ let outerParent = Some.This $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
530+ innerParents = maybeToList $ fmap Some.This innerSubscription
654531 return $ outerParent : innerParents
655532 , eventSubscribedHasOwnHeightRef = True
656533 , eventSubscribedWhoCreated = whoCreatedIORef $ coincidenceSubscribedCachedSubscribed subscribed
@@ -664,22 +541,34 @@ getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
664541whoCreatedEventSubscribed :: EventSubscribed x -> IO [String]
665542whoCreatedEventSubscribed = eventSubscribedWhoCreated
666543
667−walkInvalidHeightParents :: EventSubscribed x -> IO [EventSubscribed x]
544+walkInvalidHeightParents :: EventSubscribed x -> IO [Some (EventSubscribed x)]
668545walkInvalidHeightParents s0 = do
669− subscribers <- flip execStateT mempty $ ($ s0) $ fix $ \loop s -> do
546+ subscribers <- flip execStateT mempty $ ($ Some.This s0) $ fix $ \loop (Some.This s) -> do
670547 h <- liftIO $ readIORef $ eventSubscribedHeightRef s
671548 when (h == invalidHeight) $ do
672549 when (eventSubscribedHasOwnHeightRef s) $ liftIO $ writeIORef (eventSubscribedHeightRef s) $! invalidHeightBeingTraversed
673− modify (s :)
550+ modify (Some.This s :)
674551 mapM_ loop =<< liftIO (eventSubscribedGetParents s)
675− forM_ subscribers $ \s -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
552+ forM_ subscribers $ \(Some.This s) -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
676553 return subscribers
677554#endif
678555
679556{-# INLINE subscribeHoldEvent #-}
680−subscribeHoldEvent :: Hold x p -> Subscriber x p -> EventM x (EventSubscription x, Maybe p)
557+subscribeHoldEvent :: CanSubscribe x m => Hold x p -> Subscriber x p -> m (EventSubscription x, Maybe p)
681558subscribeHoldEvent = subscribeAndRead . holdEvent
682559
560+--------------------------------------------------------------------------------
561+-- EventSubscription
562+--------------------------------------------------------------------------------
563+
564+data EventSubscription x = EventSubscription
565+ { _eventSubscription_unsubscribe :: !(IO ())
566+ , _eventSubscription_subscribed :: {-# UNPACK #-} !(EventSubscribed x)
567+ }
568+
569+unsubscribe :: EventSubscription x -> IO ()
570+unsubscribe (EventSubscription u _) = u
571+
683572--------------------------------------------------------------------------------
684573-- Behavior
685574--------------------------------------------------------------------------------
@@ -700,7 +589,7 @@ behaviorPull !p = Behavior $ do
700589 val <- liftIO $ readIORef $ pullValue p
701590 case val of
702591 Just subscribed -> do
703− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedPull subscribed)) :))
592+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
704593 askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (pullSubscribedInvalidators subscribed) (wi:))
705594 liftIO $ touch $ pullSubscribedOwnInvalidator subscribed
706595 return $ pullSubscribedValue subscribed
@@ -709,7 +598,7 @@ behaviorPull !p = Behavior $ do
709598 wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorPull"
710599 parentsRef <- liftIO $ newIORef []
711600 holdInits <- askBehaviorHoldInits
712− a <- liftIO $ runReaderIO (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
601+ a <- liftIO $ runReaderT (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
713602 invsRef <- liftIO . newIORef . maybeToList =<< askInvalidator
714603 parents <- liftIO $ readIORef parentsRef
715604 let subscribed = PullSubscribed
@@ -719,7 +608,7 @@ behaviorPull !p = Behavior $ do
719608 , pullSubscribedParents = parents
720609 }
721610 liftIO $ writeIORef (pullValue p) $ Just subscribed
722− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some (BehaviorSubscribedPull subscribed)) :))
611+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedPull subscribed) :))
723612 return a
724613
725614behaviorDyn :: Patch p => Dyn x p -> Behavior x (PatchTarget p)
@@ -730,8 +619,7 @@ readHoldTracked :: Hold x p -> BehaviorM x (PatchTarget p)
730619readHoldTracked h = do
731620 result <- liftIO $ readIORef $ holdValue h
732621 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
622+ askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (BehaviorSubscribedHold h) :))
735623 return result
736624
737625{-# INLINABLE readBehaviorUntracked #-}
@@ -744,46 +632,42 @@ readBehaviorUntracked b = do
744632-- Dynamic
745633--------------------------------------------------------------------------------
746634
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`?
635+data Dynamic x p = Dynamic
636+ { dynamicCurrent :: !(Behavior x (PatchTarget p))
637+ , dynamicUpdated :: !(Event x p)
752638 }
753639
754−deriving instance (HasSpiderTimeline x) => Functor (Dynamic x target)
755−
756−
757−
758−
759−dynamicHold :: Hold x p -> DynamicS x p
640+dynamicHold :: HasSpiderTimeline x => Hold x p -> Dynamic x p
760641dynamicHold !h = Dynamic
761642 { dynamicCurrent = behaviorHold h
762643 , dynamicUpdated = eventHold h
763644 }
764645
765−dynamicHoldIdentity :: Hold x (Identity a) -> DynamicS x (Identity a)
646+dynamicHoldIdentity :: HasSpiderTimeline x => Hold x (Identity a) -> Dynamic x (Identity a)
766647dynamicHoldIdentity = dynamicHold
767648
768−dynamicConst :: PatchTarget p -> DynamicS x p
649+dynamicConst :: PatchTarget p -> Dynamic x p
769650dynamicConst !a = Dynamic
770651 { dynamicCurrent = behaviorConst a
771652 , dynamicUpdated = eventNever
772653 }
773654
774−dynamicDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> DynamicS x p
655+dynamicDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> Dynamic x p
775656dynamicDyn !d = Dynamic
776657 { dynamicCurrent = behaviorDyn d
777658 , dynamicUpdated = eventDyn d
778659 }
779660
780−dynamicDynIdentity :: HasSpiderTimeline x => Dyn x (Identity a) -> DynamicS x (Identity a)
661+dynamicDynIdentity :: HasSpiderTimeline x => Dyn x (Identity a) -> Dynamic x (Identity a)
781662dynamicDynIdentity = dynamicDyn
782663
783664--------------------------------------------------------------------------------
784665-- Combinators
785666--------------------------------------------------------------------------------
786667
668+--TODO: Figure out why certain things are not 'representational', then make them
669+--representational so we can use coerce
670+
787671--type role Hold representational
788672data Hold x p
789673 = Hold { holdValue :: !(IORef (PatchTarget p))
@@ -795,46 +679,35 @@ data Hold x p
795679#endif
796680 }
797681
798−-- | A statically allocated 'SpiderTimeline'
799682data Global
800683
801684{-# NOINLINE globalSpiderTimelineEnv #-}
802685globalSpiderTimelineEnv :: SpiderTimelineEnv Global
803−globalSpiderTimelineEnv = unsafePerformIO unsafeNewSpiderTimelineEnv
686+!globalSpiderTimelineEnv = unsafePerformIO unsafeNewSpiderTimelineEnv
804687
805688-- | Stores all global data relevant to a particular Spider timeline; only one
806689-- 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
690+data SpiderTimelineEnv x = SpiderTimelineEnv
813691 { _spiderTimeline_lock :: {-# UNPACK #-} !(MVar ())
814692 , _spiderTimeline_eventEnv :: {-# UNPACK #-} !(EventEnv x)
815693#ifdef DEBUG
816694 , _spiderTimeline_depth :: {-# UNPACK #-} !(IORef Int)
817695#endif
818696 }
819−type role SpiderTimelineEnv' phantom
820−
821−instance Eq (SpiderTimelineEnv x) where
822− _ == _ = True -- Since only one exists of each type
697+type role SpiderTimelineEnv nominal
823698
824699instance GEq SpiderTimelineEnv where
825− a `geq` b = if _spiderTimeline_lock (unSTE a) == _spiderTimeline_lock (unSTE b)
700+ a `geq` b = if _spiderTimeline_lock a == _spiderTimeline_lock b
826701 then Just $ unsafeCoerce Refl -- This unsafeCoerce is safe because the same SpiderTimelineEnv can't have two different 'x' arguments
827702 else Nothing
828703
829704data EventEnv x
830705 = EventEnv { eventEnvAssignments :: !(IORef [SomeAssignment x]) -- Needed for Subscribe
831706 , eventEnvHoldInits :: !(IORef [SomeHoldInit x]) -- Needed for Subscribe
832− , eventEnvDynInits :: !(IORef [SomeDynInit x])
833707 , eventEnvMergeUpdates :: !(IORef [SomeMergeUpdate x])
834708 , 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])
709+ , eventEnvClears :: !(IORef [SomeClear]) -- Needed for Subscribe
710+ , eventEnvRootClears :: !(IORef [SomeRootClear])
838711 , eventEnvCurrentHeight :: !(IORef Height) -- Needed for Subscribe
839712 , eventEnvResetCoincidences :: !(IORef [SomeResetCoincidence x]) -- Needed for Subscribe
840713 , eventEnvDelayedMerges :: !(IORef (IntMap [EventM x ()]))
@@ -845,7 +718,7 @@ runEventM :: EventM x a -> IO a
845718runEventM = unEventM
846719
847720asksEventEnv :: forall x a. HasSpiderTimeline x => (EventEnv x -> a) -> EventM x a
848−asksEventEnv f = return $ f $ _spiderTimeline_eventEnv (unSTE (spiderTimeline :: SpiderTimelineEnv x))
721+asksEventEnv f = return $ f $ _spiderTimeline_eventEnv (spiderTimeline :: SpiderTimelineEnv x)
849722
850723class MonadIO m => Defer a m where
851724 getDeferralQueue :: m (IORef [a])
@@ -864,10 +737,6 @@ instance HasSpiderTimeline x => Defer (SomeHoldInit x) (EventM x) where
864737 {-# INLINE getDeferralQueue #-}
865738 getDeferralQueue = asksEventEnv eventEnvHoldInits
866739
867−instance HasSpiderTimeline x => Defer (SomeDynInit x) (EventM x) where
868− {-# INLINE getDeferralQueue #-}
869− getDeferralQueue = asksEventEnv eventEnvDynInits
870−
871740instance Defer (SomeHoldInit x) (BehaviorM x) where
872741 {-# INLINE getDeferralQueue #-}
873742 getDeferralQueue = BehaviorM $ asks snd
@@ -894,7 +763,11 @@ instance HasSpiderTimeline x => HasCurrentHeight x (EventM x) where
894763 delayedRef <- asksEventEnv eventEnvDelayedMerges
895764 liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) (unHeight height) [subscribed]
896765
766+#ifdef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
767+class x ~ Global => HasSpiderTimeline x where
768+#else
897769class HasSpiderTimeline x where
770+#endif
898771 -- | Retrieve the current SpiderTimelineEnv
899772 spiderTimeline :: SpiderTimelineEnv x
900773
@@ -906,29 +779,21 @@ putCurrentHeight h = do
906779 heightRef <- asksEventEnv eventEnvCurrentHeight
907780 liftIO $ writeIORef heightRef $! h
908781
909−instance HasSpiderTimeline x => Defer (Some Clear) (EventM x) where
782+instance HasSpiderTimeline x => Defer SomeClear (EventM x) where
910783 {-# INLINE getDeferralQueue #-}
911784 getDeferralQueue = asksEventEnv eventEnvClears
912785
913786{-# INLINE scheduleClear #-}
914−scheduleClear :: Defer (Some Clear) m => IORef (Maybe a) -> m ()
915−scheduleClear r = defer $ Some $ Clear r
787+scheduleClear :: Defer SomeClear m => IORef (Maybe a) -> m ()
788+scheduleClear r = defer $ SomeClear r
916789
917−instance HasSpiderTimeline x => Defer (Some IntClear) (EventM x) where
918− {-# INLINE getDeferralQueue #-}
919− getDeferralQueue = asksEventEnv eventEnvIntClears
920−
921−{-# INLINE scheduleIntClear #-}
922−scheduleIntClear :: Defer (Some IntClear) m => IORef (IntMap a) -> m ()
923−scheduleIntClear r = defer $ Some $ IntClear r
924−
925−instance HasSpiderTimeline x => Defer (Some RootClear) (EventM x) where
790+instance HasSpiderTimeline x => Defer SomeRootClear (EventM x) where
926791 {-# INLINE getDeferralQueue #-}
927792 getDeferralQueue = asksEventEnv eventEnvRootClears
928793
929794{-# INLINE scheduleRootClear #-}
930−scheduleRootClear :: Defer (Some RootClear) m => IORef (DMap k Identity) -> m ()
931−scheduleRootClear r = defer $ Some $ RootClear r
795+scheduleRootClear :: Defer SomeRootClear m => IORef (DMap k Identity) -> m ()
796+scheduleRootClear r = defer $ SomeRootClear r
932797
933798instance HasSpiderTimeline x => Defer (SomeResetCoincidence x) (EventM x) where
934799 {-# INLINE getDeferralQueue #-}
@@ -957,7 +822,7 @@ hold v0 e = do
957822 return h
958823
959824{-# INLINE getHoldEventSubscription #-}
960−getHoldEventSubscription :: forall p x. (HasSpiderTimeline x, Patch p) => Hold x p -> EventM x (EventSubscription x)
825+getHoldEventSubscription :: forall m p x. (Defer (SomeAssignment x) m, Defer (SomeHoldInit x) m, Defer SomeClear m, Patch p, HasCurrentHeight x m, Defer (SomeMergeInit x) m, Defer (SomeResetCoincidence x) m, HasSpiderTimeline x, m ~ EventM x) => Hold x p -> m (EventSubscription x)
961826getHoldEventSubscription h = do
962827 ep <- liftIO $ readIORef $ holdParent h
963828 case ep of
@@ -983,9 +848,9 @@ getHoldEventSubscription h = do
983848
984849type BehaviorEnv x = (Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]), IORef [SomeHoldInit x])
985850
851+--type role BehaviorM representational
986852-- BehaviorM can sample behaviors
987−newtype BehaviorM x a = BehaviorM { unBehaviorM :: ReaderIO (BehaviorEnv x) a }
988− deriving (Functor, Applicative, MonadIO, MonadFix, MonadReader (BehaviorEnv x))
853+newtype BehaviorM x a = BehaviorM { unBehaviorM :: ReaderT (BehaviorEnv x) IO a } deriving (Functor, Applicative, MonadIO, MonadFix)
989854
990855instance Monad (BehaviorM x) where
991856 {-# INLINE (>>=) #-}
@@ -994,16 +859,14 @@ instance Monad (BehaviorM x) where
994859 BehaviorM x >> BehaviorM y = BehaviorM $ x >> y
995860 {-# INLINE return #-}
996861 return x = BehaviorM $ return x
997−#if !MIN_VERSION_base(4,13,0)
998862 {-# INLINE fail #-}
999863 fail s = BehaviorM $ fail s
1000−#endif
1001864
1002865data BehaviorSubscribed x a
1003866 = forall p. BehaviorSubscribedHold (Hold x p)
1004867 | BehaviorSubscribedPull (PullSubscribed x a)
1005868
1006−newtype SomeBehaviorSubscribed x = SomeBehaviorSubscribed (Some (BehaviorSubscribed x))
869+data SomeBehaviorSubscribed x = forall a. SomeBehaviorSubscribed (BehaviorSubscribed x a)
1007870
1008871--type role PullSubscribed representational
1009872data PullSubscribed x a
@@ -1038,7 +901,7 @@ data RootSubscribed x a = forall k. GCompare k => RootSubscribed
1038901#endif
1039902 }
1040903
1041−data Root x k
904+data Root x (k :: * -> *)
1042905 = Root { rootOccurrence :: !(IORef (DMap k Identity)) -- The currently-firing occurrence of this event
1043906 , rootSubscribed :: !(IORef (DMap k (RootSubscribed x)))
1044907 , rootInit :: !(forall a. k a -> RootTrigger x a -> IO (IO ()))
@@ -1046,8 +909,6 @@ data Root x k
1046909
1047910data SomeHoldInit x = forall p. Patch p => SomeHoldInit !(Hold x p)
1048911
1049−data SomeDynInit x = forall p. Patch p => SomeDynInit !(Dyn x p)
1050−
1051912data SomeMergeUpdate x = SomeMergeUpdate
1052913 { _someMergeUpdate_update :: !(EventM x [EventSubscription x])
1053914 , _someMergeUpdate_invalidateHeight :: !(IO ())
@@ -1057,14 +918,18 @@ data SomeMergeUpdate x = SomeMergeUpdate
1057918newtype SomeMergeInit x = SomeMergeInit { unSomeMergeInit :: EventM x () }
1058919
1059920-- 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)
921+newtype EventM x a = EventM { unEventM :: IO a } deriving (Functor, Applicative, Monad, MonadIO, MonadFix, MonadException, MonadAsyncException) -- The environment should be Nothing if we are not in a frame, and Just if we are - in which case it is a list of assignments to be done after the frame is over
1061922
1062−newtype MergeSubscribedParent x a = MergeSubscribedParent { unMergeSubscribedParent :: EventSubscription x }
923+newtype ComputeM x a = ComputeM (ReaderT (IORef [SomeHoldInit x]) IO a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
1063924
1064−data MergeSubscribedParentWithMove x k a = MergeSubscribedParentWithMove
1065− { _mergeSubscribedParentWithMove_subscription :: !(EventSubscription x)
1066− , _mergeSubscribedParentWithMove_key :: !(IORef (k a))
1067− }
925+instance Defer (SomeHoldInit x) (ComputeM x) where
926+ getDeferralQueue = ComputeM ask
927+
928+{-# INLINABLE runComputeM #-}
929+runComputeM :: Defer (SomeHoldInit x) m => ComputeM x a -> m a
930+runComputeM (ComputeM a) = liftIO . runReaderT a =<< getDeferralQueue
931+
932+newtype MergeSubscribedParent x a = MergeSubscribedParent { unMergeSubscribedParent :: EventSubscription x }
1068933
1069934data HeightBag = HeightBag
1070935 { _heightBag_size :: {-# UNPACK #-} !Int
@@ -1082,8 +947,7 @@ heightBagFromList :: [Height] -> HeightBag
1082947heightBagFromList heights = heightBagVerify $ foldl' (flip heightBagAdd) heightBagEmpty heights
1083948
1084949heightBagAdd :: Height -> HeightBag -> HeightBag
1085−heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $
1086− IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
950+heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
1087951
1088952heightBagRemove :: Height -> HeightBag -> HeightBag
1089953heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.lookup h c of
@@ -1092,13 +956,6 @@ heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.loo
1092956 0 -> IntMap.delete h c
1093957 _ -> IntMap.insert h (pred old) c
1094958
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−
1102959heightBagMax :: HeightBag -> Height
1103960heightBagMax (HeightBag _ c) = case IntMap.maxViewWithKey c of
1104961 Just ((h, _), _) -> Height h
@@ -1116,25 +973,25 @@ heightBagVerify b@(HeightBag s c) = if
1116973heightBagVerify = id
1117974#endif
1118975
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)))
976+data FanSubscribedChildren (x :: *) k a = FanSubscribedChildren
977+ { _fanSubscribedChildren_list :: !(WeakBag (Subscriber x a))
978+ , _fanSubscribedChildren_self :: {-# NOUNPACK #-} !(k a, FanSubscribed x k)
979+ , _fanSubscribedChildren_weakSelf :: !(IORef (Weak (k a, FanSubscribed x k)))
1123980 }
1124981
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
982+data FanSubscribed (x :: *) k
983+ = FanSubscribed { fanSubscribedCachedSubscribed :: !(IORef (Maybe (FanSubscribed x k)))
984+ , fanSubscribedOccurrence :: !(IORef (Maybe (DMap k Identity)))
985+ , fanSubscribedSubscribers :: !(IORef (DMap k (FanSubscribedChildren x k))) -- This DMap should never be empty
1129986 , fanSubscribedParent :: !(EventSubscription x)
1130987#ifdef DEBUG_NODEIDS
1131988 , fanSubscribedNodeId :: Int
1132989#endif
1133990 }
1134991
1135−data Fan x k v
1136− = Fan { fanParent :: !(Event x (DMap k v))
1137− , fanSubscribed :: !(IORef (Maybe (FanSubscribed x k v)))
992+data Fan x k
993+ = Fan { fanParent :: !(Event x (DMap k Identity))
994+ , fanSubscribed :: !(IORef (Maybe (FanSubscribed x k)))
1138995 }
1139996
1140997data SwitchSubscribed x a
@@ -1158,9 +1015,7 @@ data Switch x a
11581015 , switchSubscribed :: !(IORef (Maybe (SwitchSubscribed x a)))
11591016 }
11601017
1161−#ifdef USE_TEMPLATE_HASKELL
11621018{-# ANN CoincidenceSubscribed "HLint: ignore Redundant bracket" #-}
1163−#endif
11641019data CoincidenceSubscribed x a
11651020 = CoincidenceSubscribed { coincidenceSubscribedCachedSubscribed :: !(IORef (Maybe (CoincidenceSubscribed x a)))
11661021 , coincidenceSubscribedOccurrence :: !(IORef (Maybe a))
@@ -1188,35 +1043,20 @@ newInvalidatorSwitch subd = return $! InvalidatorSwitch subd
11881043newInvalidatorPull :: Pull x a -> IO (Invalidator x)
11891044newInvalidatorPull p = return $! InvalidatorPull p
11901045
1191−instance HasSpiderTimeline x => Filterable (Event x) where
1192− mapMaybe f = push $ return . f
1046+instance HasSpiderTimeline x => FunctorMaybe (Event x) where
1047+ fmapMaybe f = push $ return . f
11931048
11941049instance HasSpiderTimeline x => Align (Event x) where
11951050 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)
1051+ align ea eb = fmapMaybe dmapToThese $ merge $ dynamicConst $ DMap.fromList [LeftTag :=> ea, RightTag :=> eb]
12121052
1213−newtype Dyn (x :: Type) p = Dyn { unDyn :: IORef (DynType x p) }
1053+newtype Dyn x p = Dyn { unDyn :: IORef (Either (BehaviorM x (PatchTarget p), Event x p) (Hold x p)) }
12141054
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)
1055+newMapDyn :: HasSpiderTimeline x => (a -> b) -> Dynamic x (Identity a) -> Dynamic x (Identity b)
1056+newMapDyn f d = dynamicDynIdentity $ unsafeDyn (fmap f $ readBehaviorTracked $ dynamicCurrent d) (Identity . f . runIdentity <$> dynamicUpdated d)
12171057
12181058--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)
1059+zipDynWith :: HasSpiderTimeline x => (a -> b -> c) -> Dynamic x (Identity a) -> Dynamic x (Identity b) -> Dynamic x (Identity c)
12201060zipDynWith f da db =
12211061 let eab = align (dynamicUpdated da) (dynamicUpdated db)
12221062 ec = flip push eab $ \o -> do
@@ -1229,22 +1069,19 @@ zipDynWith f da db =
12291069 return (a, b)
12301070 These (Identity a) (Identity b) -> return (a, b)
12311071 return $ Just $ Identity $ f a b
1232− in dynamicDynIdentity $ unsafeBuildDynamic (f <$> readBehaviorUntracked (dynamicCurrent da) <*> readBehaviorUntracked (dynamicCurrent db)) ec
1233−
1234−buildDynamic :: (Defer (SomeDynInit x) m, Patch p) => EventM x (PatchTarget p) -> Event x p -> m (Dyn x p)
1235−buildDynamic readV0 v' = do
1236− result <- liftIO $ newIORef $ BuildDyn (readV0, v')
1237− let !d = Dyn result
1238− defer $ SomeDynInit d
1239− return d
1072+ in dynamicDynIdentity $ unsafeDyn (f <$> readBehaviorUntracked (dynamicCurrent da) <*> readBehaviorUntracked (dynamicCurrent db)) ec
12401073
1241−unsafeBuildDynamic :: BehaviorM x (PatchTarget p) -> Event x p -> Dyn x p
1242−unsafeBuildDynamic readV0 v' =
1243− Dyn $ unsafePerformIO $ newIORef $ UnsafeDyn (readV0, v')
1074+unsafeDyn :: BehaviorM x (PatchTarget p) -> Event x p -> Dyn x p
1075+unsafeDyn readV0 v' = Dyn $ unsafeNewIORef x $ Left x
1076+ where x = (readV0, v')
12441077
12451078-- ResultM can read behaviors and events
12461079type ResultM = EventM
12471080
1081+{-# NOINLINE unsafeNewIORef #-}
1082+unsafeNewIORef :: a -> b -> IORef b
1083+unsafeNewIORef _ b = unsafePerformIO $ newIORef b
1084+
12481085instance HasSpiderTimeline x => Functor (Event x) where
12491086 fmap f = push $ return . Just . f
12501087
@@ -1257,42 +1094,33 @@ push f e = cacheEvent (pushCheap f e)
12571094
12581095{-# INLINABLE pull #-}
12591096pull :: BehaviorM x a -> Behavior x a
1260−pull a = unsafePerformIO $ do
1261− ref <- newIORef Nothing
1262−#ifdef DEBUG_NODEIDS
1263− nid <- newNodeId
1264−#endif
1265− pure $ behaviorPull $ Pull
1266− { pullCompute = a
1267− , pullValue = ref
1097+pull a = behaviorPull $ Pull
1098+ { pullCompute = a
1099+ , pullValue = unsafeNewIORef a Nothing
12681100#ifdef DEBUG_NODEIDS
1269− , pullNodeId = nid
1101+ , pullNodeId = unsafeNodeId a
12701102#endif
1271− }
1103+ }
12721104
12731105{-# INLINABLE switch #-}
12741106switch :: 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− }
1107+switch a = eventSwitch $ Switch
1108+ { switchParent = a
1109+ , switchSubscribed = unsafeNewIORef a Nothing
1110+ }
12811111
12821112coincidence :: 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− }
1113+coincidence a = eventCoincidence $ Coincidence
1114+ { coincidenceParent = a
1115+ , coincidenceSubscribed = unsafeNewIORef a Nothing
1116+ }
12891117
12901118-- Propagate the given event occurrence; before cleaning up, run the given action, which may read the state of events and behaviors
12911119run :: forall x b. HasSpiderTimeline x => [DSum (RootTrigger x) Identity] -> ResultM x b -> SpiderHost x b
12921120run roots after = do
12931121 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
1122+ t <- SpiderHost ask
1123+ result <- SpiderHost $ lift $ withMVar (_spiderTimeline_lock t) $ \_ -> flip runReaderT t $ unSpiderHost $ runFrame $ do
12961124 rootsToPropagate <- forM roots $ \r@(RootTrigger (_, occRef, k) :=> a) -> do
12971125 occBefore <- liftIO $ do
12981126 occBefore <- readIORef occRef
@@ -1330,11 +1158,9 @@ scheduleMerge' initialHeight heightRef a = scheduleMerge initialHeight $ do
13301158 GT -> scheduleMerge' height heightRef a -- The height has been increased (by a coincidence event; TODO: is this the only way?)
13311159 EQ -> a
13321160
1333−newtype Clear a = Clear (IORef (Maybe a))
1334−
1335−newtype IntClear a = IntClear (IORef (IntMap a))
1161+data SomeClear = forall a. SomeClear (IORef (Maybe a))
13361162
1337−newtype RootClear k = RootClear (IORef (DMap k Identity))
1163+data SomeRootClear = forall k. SomeRootClear (IORef (DMap k Identity))
13381164
13391165data SomeAssignment x = forall a. SomeAssignment {-# UNPACK #-} !(IORef a) {-# UNPACK #-} !(IORef [Weak (Invalidator x)]) a
13401166
@@ -1346,110 +1172,55 @@ mkWeakPtrWithDebug x debugNote = do
13461172 x' <- evaluate x
13471173 mkWeakPtr x' $
13481174 if debugFinalize
1349− then Just $ debugStrLn $ "finalizing: " ++ debugNote
1175+ then Just $ putStrLn $ "finalizing: " ++ debugNote
13501176 else Nothing
13511177
13521178type WeakList a = [Weak a]
13531179
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−
13811180{-# 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
1181+#ifdef DEBUG
1182+withIncreasedDepth :: CanTrace x m => m a -> m a
1183+withIncreasedDepth a = do
1184+ spiderTimeline <- askSpiderTimelineEnv
1185+ liftIO $ modifyIORef' (_spiderTimeline_depth spiderTimeline) succ
13851186 result <- a
1386− liftIO $ modifyIORef' (_spiderTimeline_depth $ unSTE (spiderTimeline :: SpiderTimelineEnv x)) pred
1187+ liftIO $ modifyIORef' (_spiderTimeline_depth spiderTimeline) pred
13871188 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−
14121189#else
1190+withIncreasedDepth :: m a -> m a
1191+withIncreasedDepth = id
1192+#endif
14131193
1414−{-# INLINE withIncreasedDepth #-}
1415−withIncreasedDepth :: proxy x -> m a -> m a
1416−withIncreasedDepth _ = id
1194+type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
14171195
14181196{-# INLINE tracePropagate #-}
14191197tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1420−tracePropagate _ _ = return ()
1198+tracePropagate p = traceWhen p debugPropagate
14211199
14221200{-# INLINE traceInvalidate #-}
14231201traceInvalidate :: String -> IO ()
1424−traceInvalidate _ = return ()
1425−
1426−{-# INLINE traceInvalidateHeight #-}
1427−traceInvalidateHeight :: String -> IO ()
1428−traceInvalidateHeight _ = return ()
1429−
1430−{-# INLINE debugSubscriber #-}
1431−debugSubscriber :: String -> Subscriber x a -> IO (Subscriber x a)
1432−debugSubscriber _ = return
1433−
1434−{-# INLINE debugSubscriber' #-}
1435−debugSubscriber' :: String -> Subscriber x a -> Subscriber x a
1436−debugSubscriber' _ = id
1437−
1438−
1202+traceInvalidate = when debugInvalidate . liftIO . putStrLn
14391203
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 ()
1204+{-# INLINE traceWhen #-}
1205+traceWhen :: (CanTrace x m) => proxy x -> Bool -> String -> m ()
1206+traceWhen p b message = traceMWhen p b $ return message
14471207
1208+{-# INLINE traceMWhen #-}
1209+traceMWhen :: (CanTrace x m) => proxy x -> Bool -> m String -> m ()
1210+traceMWhen _ b getMessage = when b $ do
1211+ message <- getMessage
1212+#ifdef DEBUG
1213+ spiderTimeline <- askSpiderTimelineEnv
1214+ d <- liftIO $ readIORef $ _spiderTimeline_depth spiderTimeline
1215+#else
1216+ let d = 0
14481217#endif
1218+ liftIO $ putStrLn $ replicate d ' ' <> message
14491219
14501220whoCreatedIORef :: IORef a -> IO [String]
14511221whoCreatedIORef (IORef a) = whoCreated $! a
14521222
1223+#ifdef DEBUG_CYCLES
14531224groupByHead :: Eq a => [NonEmpty a] -> [(a, NonEmpty [a])]
14541225groupByHead = \case
14551226 [] -> []
@@ -1460,54 +1231,20 @@ groupByHead = \case
14601231 | otherwise -> (x, xs :| []) : l
14611232
14621233listsToForest :: Eq a => [[a]] -> Forest a
1463−listsToForest lists = buildForest <$> 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−
1234+listsToForest l = fmap (\(a, l') -> Node a $ listsToForest $ toList l') $ groupByHead $ catMaybes $ fmap nonEmpty l
14951235#endif
14961236
1497−
14981237{-# INLINE propagateSubscriberHold #-}
14991238propagateSubscriberHold :: forall x p. (HasSpiderTimeline x, Patch p) => Hold x p -> p -> EventM x ()
15001239propagateSubscriberHold h a = do
1501− {-# SCC "trace" #-} when debugPropagate $ traceM (Proxy :: Proxy x) $ liftIO $ do
1240+ {-# SCC "trace" #-} traceMWhen (Proxy :: Proxy x) debugPropagate $ liftIO $ do
15021241 invalidators <- liftIO $ readIORef $ holdInvalidators h
15031242 return $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
1504−
15051243 v <- {-# SCC "read" #-} liftIO $ readIORef $ holdValue h
15061244 case {-# SCC "apply" #-} apply a v of
15071245 Nothing -> return ()
15081246 Just v' -> do
1509− {-# SCC "trace2" #-} withIncreasedDepth (Proxy :: Proxy x) $
1510− tracePropagate (Proxy :: Proxy x) ("propagateSubscriberHold: assigning Hold" <> showNodeId h)
1247+ {-# SCC "trace2" #-} withIncreasedDepth $ tracePropagate (Proxy :: Proxy x) $ "propagateSubscriberHold: assigning Hold" <> showNodeId h
15111248 vRef <- {-# SCC "vRef" #-} liftIO $ evaluate $ holdValue h
15121249 iRef <- {-# SCC "iRef" #-} liftIO $ evaluate $ holdInvalidators h
15131250 defer $ {-# SCC "assignment" #-} SomeAssignment vRef iRef v'
@@ -1515,25 +1252,25 @@ propagateSubscriberHold h a = do
15151252data SomeResetCoincidence x = forall a. SomeResetCoincidence !(EventSubscription x) !(Maybe (CoincidenceSubscribed x a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
15161253
15171254runBehaviorM :: 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)
1255+runBehaviorM a mwi holdInits = runReaderT (unBehaviorM a) (mwi, holdInits)
15191256
15201257askInvalidator :: BehaviorM x (Maybe (Weak (Invalidator x)))
15211258askInvalidator = do
1522− (!m, _) <- ask
1259+ (!m, _) <- BehaviorM ask
15231260 case m of
15241261 Nothing -> return Nothing
15251262 Just (!wi, _) -> return $ Just wi
15261263
15271264askParentsRef :: BehaviorM x (Maybe (IORef [SomeBehaviorSubscribed x]))
15281265askParentsRef = do
1529− (!m, _) <- ask
1266+ (!m, _) <- BehaviorM ask
15301267 case m of
15311268 Nothing -> return Nothing
15321269 Just (_, !p) -> return $ Just p
15331270
15341271askBehaviorHoldInits :: BehaviorM x (IORef [SomeHoldInit x])
15351272askBehaviorHoldInits = do
1536− (_, !his) <- ask
1273+ (_, !his) <- BehaviorM ask
15371274 return his
15381275
15391276{-# INLINE getDynHold #-}
@@ -1541,27 +1278,30 @@ getDynHold :: (Defer (SomeHoldInit x) m, Patch p) => Dyn x p -> m (Hold x p)
15411278getDynHold d = do
15421279 mh <- liftIO $ readIORef $ unDyn d
15431280 case mh of
1544− HoldDyn h -> return h
1545− UnsafeDyn (readV0, v') -> do
1281+ Right h -> return h
1282+ Left (readV0, v') -> do
15461283 holdInits <- getDeferralQueue
15471284 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
15541285 h <- hold v0 v'
1555− liftIO $ writeIORef (unDyn d) $ HoldDyn h
1286+ liftIO $ writeIORef (unDyn d) $ Right h
15561287 return h
15571288
1558−
15591289-- Always refers to 0
15601290{-# NOINLINE zeroRef #-}
15611291zeroRef :: IORef Height
15621292zeroRef = unsafePerformIO $ newIORef zeroHeight
15631293
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)
1294+type CanSubscribe x m =
1295+ ( HasSpiderTimeline x
1296+ , HasCurrentHeight x m
1297+ , Defer (SomeHoldInit x) m, Defer (SomeMergeInit x) m -- The things we need to lazily initialize state
1298+ , Defer SomeClear m -- Wiping out event firings
1299+ , Defer (SomeAssignment x) m -- Updating state
1300+ , Defer (SomeResetCoincidence x) m
1301+ , m ~ EventM x
1302+ )
1303+
1304+getRootSubscribed :: GCompare k => k a -> Root x k -> Subscriber x a -> IO (WeakBagTicket, RootSubscribed x a, Maybe a)
15651305getRootSubscribed k r sub = do
15661306 mSubscribed <- readIORef $ rootSubscribed r
15671307 let getOcc = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
@@ -1575,15 +1315,10 @@ getRootSubscribed k r sub = do
15751315 let !cached = rootSubscribed r
15761316 uninitRef <- newIORef $ error "getRootsubscribed: uninitRef not initialized"
15771317 (subs, sln) <- WeakBag.singleton sub weakSelf cleanupRootSubscribed
1578−
1579− tracePropagate (Proxy::Proxy x) $ "getRootSubscribed: calling rootInit"
1580−
1318+ when debugPropagate $ putStrLn $ "getRootSubscribed: calling rootInit"
15811319 uninit <- rootInit r k $ RootTrigger (subs, rootOccurrence r, k)
15821320 writeIORef uninitRef $! uninit
1583−#ifdef DEBUG_NODEIDS
1584− nid <- newNodeId
1585−#endif
1586− let !subscribed = RootSubscribed
1321+ let subscribed = RootSubscribed
15871322 { rootSubscribedKey = k
15881323 , rootSubscribedCachedSubscribed = cached
15891324 , rootSubscribedOccurrence = getOcc
@@ -1591,29 +1326,17 @@ getRootSubscribed k r sub = do
15911326 , rootSubscribedUninit = uninit
15921327 , rootSubscribedWeakSelf = weakSelf
15931328#ifdef DEBUG_NODEIDS
1594− , rootSubscribedNodeId = nid
1329+ , rootSubscribedNodeId = unsafeNodeId (k, r, subs)
15951330#endif
15961331 }
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)
1332+ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "RootSubscribed"
16081333 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
16091334 occ <- getOcc
16101335 return (sln, subscribed, occ)
16111336
1612−#ifdef USE_TEMPLATE_HASKELL
16131337{-# ANN cleanupRootSubscribed "HLint: ignore Redundant bracket" #-}
1614−#endif
16151338cleanupRootSubscribed :: RootSubscribed x a -> IO ()
1616−cleanupRootSubscribed self@RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached } = do
1339+cleanupRootSubscribed self@(RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached }) = do
16171340 rootSubscribedUninit self
16181341 modifyIORef' cached $ DMap.delete k
16191342
@@ -1621,90 +1344,8 @@ cleanupRootSubscribed self@RootSubscribed { rootSubscribedKey = k, rootSubscribe
16211344subscribeRootSubscribed :: RootSubscribed x a -> Subscriber x a -> IO WeakBagTicket
16221345subscribeRootSubscribed subscribed sub = WeakBag.insert sub (rootSubscribedSubscribers subscribed) (rootSubscribedWeakSelf subscribed) cleanupRootSubscribed
16231346
1624−newtype EventSelectorInt x a = EventSelectorInt { selectInt :: Int -> Event x a }
1625−
1626−data FanInt x a = FanInt
1627− { _fanInt_subscribers :: {-# UNPACK #-} !(FastMutableIntMap (FastWeakBag (Subscriber x a))) --TODO: Clean up the keys in here when their child weak bags get empty --TODO: Remove our own subscription when the subscribers list is completely empty
1628− , _fanInt_subscriptionRef :: {-# UNPACK #-} !(IORef (EventSubscription x)) -- This should have a valid subscription iff subscribers is non-empty
1629− , _fanInt_occRef :: {-# UNPACK #-} !(IORef (IntMap a))
1630−#ifdef DEBUG_NODEIDS
1631− , _fanInt_nodeId :: {-# UNPACK #-} !Int
1632−#endif
1633− }
1634−
1635−newFanInt :: IO (FanInt x a)
1636−newFanInt = do
1637− subscribers <- FastMutableIntMap.newEmpty --TODO: Clean up the keys in here when their child weak bags get empty --TODO: Remove our own subscription when the subscribers list is completely empty
1638− subscriptionRef <- newIORef $ error "fanInt: no subscription"
1639− occRef <- newIORef $ error "fanInt: no occurrence"
1640−#ifdef DEBUG_NODEIDS
1641− nodeId <- newNodeId
1642−#endif
1643− return $ FanInt
1644− { _fanInt_subscribers = subscribers
1645− , _fanInt_subscriptionRef = subscriptionRef
1646− , _fanInt_occRef = occRef
1647−#ifdef DEBUG_NODEIDS
1648− , _fanInt_nodeId = nodeId
1649−#endif
1650− }
1651−
1652−fanInt :: HasSpiderTimeline x => Event x (IntMap a) -> EventSelectorInt x a
1653−fanInt p = unsafePerformIO $ do
1654− self <- newFanInt
1655− pure $ EventSelectorInt $ \k -> Event $ \sub -> do
1656− isEmpty <- liftIO $ FastMutableIntMap.isEmpty (_fanInt_subscribers self)
1657− when isEmpty $ do -- This is the first subscriber, so we need to subscribe to our input
1658− let desc = "fanInt" <> showNodeId self <> ", k = " <> show k
1659− (subscription, parentOcc) <- subscribeAndRead p $ debugSubscriber' desc $ Subscriber
1660− { subscriberPropagate = \m -> do
1661− liftIO $ writeIORef (_fanInt_occRef self) m
1662− scheduleIntClear $ _fanInt_occRef self
1663− FastMutableIntMap.forIntersectionWithImmutable_ (_fanInt_subscribers self) m $ \b v -> --TODO: Do we need to know that no subscribers are being added as we traverse?
1664− FastWeakBag.traverse_ b $ \s ->
1665− subscriberPropagate s v
1666− , subscriberInvalidateHeight = \old ->
1667− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1668− FastWeakBag.traverse_ b $ \s ->
1669− subscriberInvalidateHeight s old
1670− , subscriberRecalculateHeight = \new ->
1671− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b ->
1672− FastWeakBag.traverse_ b $ \s ->
1673− subscriberRecalculateHeight s new
1674− }
1675− liftIO $ do
1676− writeIORef (_fanInt_subscriptionRef self) subscription
1677− writeIORef (_fanInt_occRef self) $ fromMaybe IntMap.empty parentOcc
1678− scheduleIntClear $ _fanInt_occRef self
1679− liftIO $ do
1680− b <- FastMutableIntMap.lookup (_fanInt_subscribers self) k >>= \case
1681− Nothing -> do
1682− b <- FastWeakBag.empty
1683− FastMutableIntMap.insert (_fanInt_subscribers self) k b
1684− return b
1685− Just b -> return b
1686− ticket <- liftIO $ FastWeakBag.insert sub b
1687− currentOcc <- readIORef (_fanInt_occRef self)
1688−
1689− subscribed <- fanIntSubscribed ticket self
1690− return (EventSubscription (FastWeakBag.remove ticket) subscribed, IntMap.lookup k currentOcc)
1691−
1692−fanIntSubscribed :: FastWeakBagTicket k -> FanInt x a -> IO (EventSubscribed x)
1693−fanIntSubscribed ticket self = do
1694− subscribedParent <- _eventSubscription_subscribed <$> readIORef (_fanInt_subscriptionRef self)
1695− return $ EventSubscribed
1696− { eventSubscribedHeightRef = eventSubscribedHeightRef subscribedParent
1697− , eventSubscribedRetained = toAny (_fanInt_subscriptionRef self, ticket)
1698−#ifdef DEBUG_CYCLES
1699− , eventSubscribedGetParents = return [subscribedParent]
1700− , eventSubscribedHasOwnHeightRef = False
1701− , eventSubscribedWhoCreated = whoCreatedIORef $ _fanInt_subscriptionRef self
1702−#endif
1703− }
1704−
1705−
17061347{-# 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))
1348+getFanSubscribed :: (Defer (SomeAssignment x) m, Defer (SomeHoldInit x) m, Defer (SomeMergeInit x) m, Defer SomeClear m, HasCurrentHeight x m, Defer (SomeResetCoincidence x) m, HasSpiderTimeline x, m ~ EventM x, GCompare k) => k a -> Fan x k -> Subscriber x a -> m (WeakBagTicket, FanSubscribed x k, Maybe a)
17081349getFanSubscribed k f sub = do
17091350 mSubscribed <- liftIO $ readIORef $ fanSubscribed f
17101351 case mSubscribed of
@@ -1722,16 +1363,13 @@ getFanSubscribed k f sub = do
17221363 subscribersRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribersRef not yet initialized"
17231364 occRef <- liftIO $ newIORef parentOcc
17241365 when (isJust parentOcc) $ scheduleClear occRef
1725−#ifdef DEBUG_NODEIDS
1726− nid <- liftIO newNodeId
1727−#endif
17281366 let subscribed = FanSubscribed
17291367 { fanSubscribedCachedSubscribed = fanSubscribed f
17301368 , fanSubscribedOccurrence = occRef
17311369 , fanSubscribedParent = subscription
17321370 , fanSubscribedSubscribers = subscribersRef
17331371#ifdef DEBUG_NODEIDS
1734− , fanSubscribedNodeId = nid
1372+ , fanSubscribedNodeId = unsafeNodeId f
17351373#endif
17361374 }
17371375 let !self = (k, subscribed)
@@ -1741,7 +1379,7 @@ getFanSubscribed k f sub = do
17411379 liftIO $ writeIORef (fanSubscribed f) $ Just subscribed
17421380 return (slnForSub, subscribed, coerce $ DMap.lookup k =<< parentOcc)
17431381
1744−cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed x k v) -> IO ()
1382+cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed x k) -> IO ()
17451383cleanupFanSubscribed (k, subscribed) = do
17461384 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
17471385 let reducedSubscribers = DMap.delete k subscribers
@@ -1753,7 +1391,7 @@ cleanupFanSubscribed (k, subscribed) = do
17531391 else writeIORef (fanSubscribedSubscribers subscribed) $! reducedSubscribers
17541392
17551393{-# INLINE subscribeFanSubscribed #-}
1756−subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed x k v -> Subscriber x (v a) -> IO WeakBagTicket
1394+subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed x k -> Subscriber x a -> IO WeakBagTicket
17571395subscribeFanSubscribed k subscribed sub = do
17581396 subscribers <- readIORef $ fanSubscribedSubscribers subscribed
17591397 case DMap.lookup k subscribers of
@@ -1766,7 +1404,7 @@ subscribeFanSubscribed k subscribed sub = do
17661404 Just (FanSubscribedChildren list _ weakSelf) -> {-# SCC "hitSubscribeFanSubscribed" #-} WeakBag.insert sub list weakSelf cleanupFanSubscribed
17671405
17681406{-# INLINABLE getSwitchSubscribed #-}
1769−getSwitchSubscribed :: HasSpiderTimeline x => Switch x a -> Subscriber x a -> EventM x (WeakBagTicket, SwitchSubscribed x a, Maybe a)
1407+getSwitchSubscribed :: (Defer (SomeHoldInit x) m, Defer (SomeAssignment x) m, Defer (SomeMergeInit x) m, Defer SomeClear m, Defer (SomeResetCoincidence x) m, HasCurrentHeight x m, HasSpiderTimeline x, m ~ EventM x) => Switch x a -> Subscriber x a -> m (WeakBagTicket, SwitchSubscribed x a, Maybe a)
17701408getSwitchSubscribed s sub = do
17711409 mSubscribed <- liftIO $ readIORef $ switchSubscribed s
17721410 case mSubscribed of
@@ -1791,9 +1429,6 @@ getSwitchSubscribed s sub = do
17911429 when (isJust parentOcc) $ scheduleClear occRef
17921430 weakSelf <- liftIO $ newIORef $ error "getSwitchSubscribed: weakSelf not yet initialized"
17931431 (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupSwitchSubscribed
1794−#ifdef DEBUG_NODEIDS
1795− nid <- liftIO newNodeId
1796−#endif
17971432 let !subscribed = SwitchSubscribed
17981433 { switchSubscribedCachedSubscribed = switchSubscribed s
17991434 , switchSubscribedOccurrence = occRef
@@ -1806,7 +1441,7 @@ getSwitchSubscribed s sub = do
18061441 , switchSubscribedCurrentParent = subscriptionRef
18071442 , switchSubscribedWeakSelf = weakSelf
18081443#ifdef DEBUG_NODEIDS
1809− , switchSubscribedNodeId = nid
1444+ , switchSubscribedNodeId = unsafeNodeId s
18101445#endif
18111446 }
18121447 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "switchSubscribedWeakSelf"
@@ -1825,7 +1460,7 @@ subscribeSwitchSubscribed :: SwitchSubscribed x a -> Subscriber x a -> IO WeakBa
18251460subscribeSwitchSubscribed subscribed sub = WeakBag.insert sub (switchSubscribedSubscribers subscribed) (switchSubscribedWeakSelf subscribed) cleanupSwitchSubscribed
18261461
18271462{-# INLINABLE getCoincidenceSubscribed #-}
1828−getCoincidenceSubscribed :: forall x a. HasSpiderTimeline x => Coincidence x a -> Subscriber x a -> EventM x (WeakBagTicket, CoincidenceSubscribed x a, Maybe a)
1463+getCoincidenceSubscribed :: forall x a m. (Defer (SomeAssignment x) m, Defer (SomeHoldInit x) m, Defer (SomeMergeInit x) m, Defer SomeClear m, HasCurrentHeight x m, Defer (SomeResetCoincidence x) m, HasSpiderTimeline x, m ~ EventM x) => Coincidence x a -> Subscriber x a -> m (WeakBagTicket, CoincidenceSubscribed x a, Maybe a)
18291464getCoincidenceSubscribed c sub = do
18301465 mSubscribed <- liftIO $ readIORef $ coincidenceSubscribed c
18311466 case mSubscribed of
@@ -1851,9 +1486,6 @@ getCoincidenceSubscribed c sub = do
18511486 scheduleClear innerSubdRef
18521487 weakSelf <- liftIO $ newIORef $ error "getCoincidenceSubscribed: weakSelf not yet implemented"
18531488 (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupCoincidenceSubscribed
1854−#ifdef DEBUG_NODEIDS
1855− nid <- liftIO newNodeId
1856−#endif
18571489 let subscribed = CoincidenceSubscribed
18581490 { coincidenceSubscribedCachedSubscribed = coincidenceSubscribed c
18591491 , coincidenceSubscribedOccurrence = occRef
@@ -1864,7 +1496,7 @@ getCoincidenceSubscribed c sub = do
18641496 , coincidenceSubscribedInnerParent = innerSubdRef
18651497 , coincidenceSubscribedWeakSelf = weakSelf
18661498#ifdef DEBUG_NODEIDS
1867− , coincidenceSubscribedNodeId = nid
1499+ , coincidenceSubscribedNodeId = unsafeNodeId c
18681500#endif
18691501 }
18701502 liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "CoincidenceSubscribed"
@@ -1881,497 +1513,216 @@ cleanupCoincidenceSubscribed subscribed = do
18811513subscribeCoincidenceSubscribed :: CoincidenceSubscribed x a -> Subscriber x a -> IO WeakBagTicket
18821514subscribeCoincidenceSubscribed subscribed sub = WeakBag.insert sub (coincidenceSubscribedSubscribers subscribed) (coincidenceSubscribedWeakSelf subscribed) cleanupCoincidenceSubscribed
18831515
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)
1516+{-# INLINE merge #-}
1517+merge :: forall k x. (HasSpiderTimeline x, GCompare k) => Dynamic x (PatchDMap k (Event x)) -> Event x (DMap k Identity)
1518+merge d = cacheEvent (mergeCheap d)
18951519
18961520{-# 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
2095− }
2096−
2097−--TODO: Be able to run as much of this as possible promptly
2098−updateMerge :: (HasSpiderTimeline x, GCompare k) => EventSubscribed x -> Merge x k v s -> MergeUpdateFunc k v x p s -> p -> SomeMergeUpdate x
2099−updateMerge subscribed m updateFunc p = SomeMergeUpdate updateMe (invalidateMergeHeight m) (revalidateMergeHeight m)
2100− where updateMe = do
2101− oldParents <- liftIO $ readIORef $ _merge_parentsRef m
2102− (subscriptionsToKill, newParents) <- updateFunc (mergeSubscriber subscribed m) (_merge_heightBagRef m) oldParents p
2103− liftIO $ writeIORef (_merge_parentsRef m) $! newParents
2104− return subscriptionsToKill
2105−
2106−{-# INLINE mergeGCheap' #-}
2107−mergeGCheap' :: forall k v x p s q. (HasSpiderTimeline x, GCompare k, PatchTarget p ~ DMap k q)
2108− => MergeGetSubscription x s -> MergeInitFunc k v q x s -> MergeUpdateFunc k v x p s -> MergeDestroyFunc k s -> DynamicS x p -> Event x (DMap k v)
2109−mergeGCheap' getParent getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
1521+mergeCheap :: forall k x. (HasSpiderTimeline x, GCompare k) => Dynamic x (PatchDMap k (Event x)) -> Event x (DMap k Identity)
1522+mergeCheap d = Event $ \sub -> do
21101523 initialParents <- readBehaviorUntracked $ dynamicCurrent d
21111524 accumRef <- liftIO $ newIORef $ error "merge: accumRef not yet initialized"
21121525 heightRef <- liftIO $ newIORef $ error "merge: heightRef not yet initialized"
21131526 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
1527+ parentsRef <- liftIO $ newIORef $ error "merge: parentsRef not yet initialized"
1528+ let scheduleSelf height = scheduleMerge' height heightRef $ do
1529+ m <- liftIO $ readIORef accumRef
1530+ liftIO $ writeIORef accumRef $! DMap.empty
1531+ --TODO: Assert that m is not empty
1532+ subscriberPropagate sub m
1533+ invalidateMyHeight = do
1534+ oldHeight <- readIORef heightRef
1535+ when (oldHeight /= invalidHeight) $ do -- If the height used to be valid, it must be invalid now; we should never have *more* heights than we have parents
1536+ writeIORef heightRef $! invalidHeight
1537+ subscriberInvalidateHeight sub oldHeight
1538+ revalidateMyHeight = do
21971539 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?
1540+ when (currentHeight == invalidHeight) $ do -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
21991541 heights <- readIORef heightBagRef
2200− numParents <- FastMutableIntMap.size parents
2201− case heightBagSize heights `compare` numParents of
1542+ parents <- readIORef parentsRef
1543+ -- When the number of heights in the bag reaches the number of parents, we should have a valid height
1544+ case heightBagSize heights `compare` DMap.size parents of
22021545 LT -> return ()
22031546 EQ -> do
22041547 let height = succHeight $ heightBagMax heights
2205− traceInvalidateHeight $ "recalculateSubscriberHeight: height: " <> show height
1548+ when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
22061549 writeIORef heightRef $! height
22071550 subscriberRecalculateHeight sub height
2208− GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show numParents <> ") for Merge"
2209− mySubscriber k = Subscriber
1551+ GT -> error $ "revalidateMergeHeight: more heights than parents for Merge"
1552+ subscriber :: forall a. k a -> Subscriber x a
1553+ subscriber k = Subscriber
22101554 { 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
1555+ oldM <- liftIO $ readIORef accumRef
1556+ let newM = DMap.insertWith (error $ "Same key fired multiple times for Merge") k (Identity a) oldM
1557+ tracePropagate (Proxy :: Proxy x) $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
1558+ liftIO $ writeIORef accumRef $! newM
1559+ when (DMap.null oldM) $ do -- Only schedule the firing once
1560+ height <- liftIO $ readIORef heightRef
1561+ --TODO: assertions about height
1562+ currentHeight <- getCurrentHeight
1563+ when (height <= currentHeight) $ do
1564+ if height /= invalidHeight
1565+ then do
1566+ myStack <- liftIO $ whoCreatedIORef undefined --TODO
1567+ error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
1568+ else liftIO $ do
1569+#ifdef DEBUG_CYCLES
1570+ nodesInvolvedInCycle <- walkInvalidHeightParents $ eventSubscribedMerge subscribed
1571+ stacks <- forM nodesInvolvedInCycle $ \(Some.This es) -> whoCreatedEventSubscribed es
1572+ let cycleInfo = ":\n" <> drawForest (listsToForest stacks)
1573+#else
1574+ let cycleInfo = ""
1575+#endif
1576+ error $ "Causality loop found" <> cycleInfo
1577+ scheduleSelf height
1578+ , subscriberInvalidateHeight = \old -> do --TODO: When removing a parent doesn't actually change the height, maybe we can avoid invalidating
22171579 modifyIORef' heightBagRef $ heightBagRemove old
22181580 invalidateMyHeight
22191581 , subscriberRecalculateHeight = \new -> do
22201582 modifyIORef' heightBagRef $ heightBagAdd new
2221− recalculateMyHeight
1583+ revalidateMyHeight
22221584 }
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
1585+ subscribers :: [(Maybe (DSum k Identity), Height, DSum k (MergeSubscribedParent x))] <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1586+ let s = subscriber k
1587+ (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead e s
1588+ height <- liftIO $ getEventSubscribedHeight parentSubd
1589+ return $ (fmap (\x -> k :=> Identity x) parentOcc, height, k :=> MergeSubscribedParent subscription)
1590+ let dm = DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1591+ heights = fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1592+ myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
1593+ myHeight = if invalidHeight `elem` heights
1594+ then invalidHeight
1595+ else succHeight $ heightBagMax myHeightBag
22381596 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
1597+ let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
1598+ then (if DMap.null dm then Nothing else Just dm, DMap.empty)
1599+ else (Nothing, dm)
1600+ unless (DMap.null accum) $ do
1601+ scheduleSelf myHeight
1602+ occRef <- liftIO $ newIORef occ
1603+ when (isJust occ) $ scheduleClear occRef
1604+ liftIO $ writeIORef accumRef $! accum
1605+ liftIO $ writeIORef heightRef $! myHeight
1606+ liftIO $ writeIORef heightBagRef $! myHeightBag
1607+ changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
1608+ liftIO $ writeIORef parentsRef $! DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1609+ let updateMe (PatchDMap p) = do
1610+ oldParents <- liftIO $ readIORef parentsRef
1611+ let f (subscriptionsToKill, ps) (k :=> ComposeMaybe me) = do
1612+ (mOldSubd, newPs) <- case me of
1613+ Nothing -> return $ DMap.updateLookupWithKey (\_ _ -> Nothing) k ps
1614+ Just e -> do
1615+ let s = subscriber k
1616+ subscription@(EventSubscription _ subd) <- subscribe e s
1617+ newParentHeight <- liftIO $ getEventSubscribedHeight subd
1618+ let newParent = MergeSubscribedParent subscription
1619+ liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1620+ return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
1621+ forM_ mOldSubd $ \oldSubd -> do
1622+ oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1623+ liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1624+ return (maybeToList (unMergeSubscribedParent <$> mOldSubd) ++ subscriptionsToKill, newPs)
1625+ (subscriptionsToKill, newParents) <- foldM f ([], oldParents) $ DMap.toList p --TODO: I think this runEventM is OK, since no events are firing at this time, but it might not be
1626+ liftIO $ writeIORef parentsRef $! newParents
1627+ return subscriptionsToKill
22461628 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
1629+ let s = Subscriber
22641630 { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
2265− tracePropagate (Proxy :: Proxy x) $ "SubscriberMergeInt/Change"
2266− defer $ updateMe a
1631+ tracePropagate (Proxy :: Proxy x) $ "SubscriberMerge/Change"
1632+ defer $ SomeMergeUpdate (updateMe a) invalidateMyHeight revalidateMyHeight
22671633 , subscriberInvalidateHeight = \_ -> return ()
22681634 , subscriberRecalculateHeight = \_ -> return ()
22691635 }
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)
1636+ (EventSubscription _ changeSubd, change) <- subscribeAndRead (dynamicUpdated d) s
1637+ forM_ change $ \c -> defer $ SomeMergeUpdate (updateMe c) invalidateMyHeight revalidateMyHeight
1638+ liftIO $ writeIORef changeSubdRef (s, changeSubd)
1639+ let unsubscribeAll = do
1640+ parents <- readIORef parentsRef
1641+ forM_ (DMap.toList parents) $ \(_ :=> MergeSubscribedParent s) -> unsubscribe s
1642+ return ( EventSubscription unsubscribeAll $ EventSubscribed heightRef $ toAny (parentsRef, changeSubdRef)
1643+ , occ
1644+ )
22801645
22811646newtype 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) }
22831647
2284−fanG :: (HasSpiderTimeline x, GCompare k) => Event x (DMap k v) -> EventSelectorG x k v
2285−fanG e = unsafePerformIO $ do
2286− ref <- newIORef Nothing
1648+fan :: (HasSpiderTimeline x, GCompare k) => Event x (DMap k Identity) -> EventSelector x k
1649+fan e =
22871650 let f = Fan
22881651 { fanParent = e
2289− , fanSubscribed = ref
1652+ , fanSubscribed = unsafeNewIORef e Nothing
22901653 }
2291− pure $ EventSelectorG $ \k -> eventFan k f
1654+ in EventSelector $ \k -> eventFan k f
22921655
2293−runHoldInits :: HasSpiderTimeline x => IORef [SomeHoldInit x] -> IORef [SomeDynInit x] -> IORef [SomeMergeInit x] -> EventM x ()
2294−runHoldInits holdInitRef dynInitRef mergeInitRef = do
1656+runHoldInits :: HasSpiderTimeline x => IORef [SomeHoldInit x] -> IORef [SomeMergeInit x] -> EventM x ()
1657+runHoldInits holdInitRef mergeInitRef = do
22951658 holdInits <- liftIO $ readIORef holdInitRef
2296− dynInits <- liftIO $ readIORef dynInitRef
22971659 mergeInits <- liftIO $ readIORef mergeInitRef
2298− unless (null holdInits && null dynInits && null mergeInits) $ do
1660+ unless (null holdInits && null mergeInits) $ do
22991661 liftIO $ writeIORef holdInitRef []
2300− liftIO $ writeIORef dynInitRef []
23011662 liftIO $ writeIORef mergeInitRef []
23021663 mapM_ initHold holdInits
2303− mapM_ initDyn dynInits
23041664 mapM_ unSomeMergeInit mergeInits
2305− runHoldInits holdInitRef dynInitRef mergeInitRef
1665+ runHoldInits holdInitRef mergeInitRef
23061666
23071667initHold :: HasSpiderTimeline x => SomeHoldInit x -> EventM x ()
23081668initHold (SomeHoldInit h) = void $ getHoldEventSubscription h
23091669
2310−initDyn :: HasSpiderTimeline x => SomeDynInit x -> EventM x ()
2311−initDyn (SomeDynInit d) = void $ getDynHold d
2312−
23131670newEventEnv :: IO (EventEnv x)
23141671newEventEnv = do
23151672 toAssignRef <- newIORef [] -- This should only actually get used when events are firing
23161673 holdInitRef <- newIORef []
2317− dynInitRef <- newIORef []
23181674 mergeUpdateRef <- newIORef []
23191675 mergeInitRef <- newIORef []
23201676 heightRef <- newIORef zeroHeight
23211677 toClearRef <- newIORef []
2322− toClearIntRef <- newIORef []
23231678 toClearRootRef <- newIORef []
23241679 coincidenceInfosRef <- newIORef []
23251680 delayedRef <- newIORef IntMap.empty
2326− return $ EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef
1681+ return $ EventEnv toAssignRef holdInitRef mergeUpdateRef mergeInitRef toClearRef toClearRootRef heightRef coincidenceInfosRef delayedRef
23271682
23281683clearEventEnv :: EventEnv x -> IO ()
2329−clearEventEnv (EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef) = do
1684+clearEventEnv (EventEnv toAssignRef holdInitRef mergeUpdateRef mergeInitRef toClearRef toClearRootRef heightRef coincidenceInfosRef delayedRef) = do
23301685 writeIORef toAssignRef []
23311686 writeIORef holdInitRef []
2332− writeIORef dynInitRef []
23331687 writeIORef mergeUpdateRef []
23341688 writeIORef mergeInitRef []
23351689 writeIORef heightRef zeroHeight
23361690 writeIORef toClearRef []
2337− writeIORef toClearIntRef []
23381691 writeIORef toClearRootRef []
23391692 writeIORef coincidenceInfosRef []
23401693 writeIORef delayedRef IntMap.empty
23411694
23421695-- | Run an event action outside of a frame
23431696runFrame :: 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)
1697+runFrame a = SpiderHost $ ask >>= \_ -> lift $ do
1698+ let env = _spiderTimeline_eventEnv (spiderTimeline :: SpiderTimelineEnv x)
23461699 let go = do
23471700 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
1701+ runHoldInits (eventEnvHoldInits env) (eventEnvMergeInits env) -- This must happen before doing the assignments, in case subscribing a Hold causes existing Holds to be read by the newly-propagated events
23491702 return result
23501703 result <- runEventM go
23511704 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
1705+ forM_ toClear $ \(SomeClear ref) -> {-# SCC "clear" #-} writeIORef ref Nothing
23551706 toClearRoot <- readIORef $ eventEnvRootClears env
2356− forM_ toClearRoot $ \(Some (RootClear ref)) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
1707+ forM_ toClearRoot $ \(SomeRootClear ref) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
23571708 toAssign <- readIORef $ eventEnvAssignments env
23581709 toReconnectRef <- newIORef []
23591710 coincidenceInfos <- readIORef $ eventEnvResetCoincidences env
23601711 forM_ toAssign $ \(SomeAssignment vRef iRef v) -> {-# SCC "assignment" #-} do
23611712 writeIORef vRef v
2362− traceInvalidate $ "Invalidating Hold"
1713+ when debugInvalidate $ putStrLn $ "Invalidating Hold"
23631714 writeIORef iRef =<< evaluate =<< invalidate toReconnectRef =<< readIORef iRef
23641715 mergeUpdates <- readIORef $ eventEnvMergeUpdates env
23651716 writeIORef (eventEnvMergeUpdates env) []
2366− tracePropagate (Proxy::Proxy x) $ "Updating merges"
1717+ when debugPropagate $ putStrLn "Updating merges"
23671718 mergeSubscriptionsToKill <- runEventM $ concat <$> mapM _someMergeUpdate_update mergeUpdates
2368− tracePropagate (Proxy::Proxy x) $ "Updating merges done"
1719+ when debugPropagate $ putStrLn "Updating merges done"
23691720 toReconnect <- readIORef toReconnectRef
23701721 clearEventEnv env
23711722 switchSubscriptionsToKill <- forM toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
23721723 oldSubscription <- readIORef $ switchSubscribedCurrentParent subscribed
23731724 wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
2374− traceInvalidate $ "Finalizing invalidator for Switch" <> showNodeId subscribed
1725+ when debugInvalidate $ putStrLn $ "Finalizing invalidator for Switch" <> showNodeId subscribed
23751726 finalize wi
23761727 i <- evaluate $ switchSubscribedOwnInvalidator subscribed
23771728 wi' <- mkWeakPtrWithDebug i "wi'"
@@ -2379,13 +1730,13 @@ runFrame a = SpiderHost $ do
23791730 writeIORef (switchSubscribedBehaviorParents subscribed) []
23801731 writeIORef (eventEnvHoldInits env) [] --TODO: Should we reuse this?
23811732 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
1733+ runEventM $ runHoldInits (eventEnvHoldInits env) (eventEnvMergeInits env) --TODO: Is this actually OK? It seems like it should be, since we know that no events are firing at this point, but it still seems inelegant
23831734 --TODO: Make sure we touch the pieces of the SwitchSubscribed at the appropriate times
23841735 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
1736+ subscription <- runReaderT (unSpiderHost (runFrame ({-# SCC "subscribeSwitch" #-} subscribe e sub))) spiderTimeline --TODO: Assert that the event isn't firing --TODO: This should not loop because none of the events should be firing, but still, it is inefficient
23861737 {-
23871738 stackTrace <- liftIO $ fmap renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
2388− liftIO $ debugStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
1739+ liftIO $ putStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
23891740 EventRoot _ -> "EventRoot"
23901741 EventNever -> "EventNever"
23911742 _ -> "something else"
@@ -2400,7 +1751,7 @@ runFrame a = SpiderHost $ do
24001751 myHeight <- readIORef $ switchSubscribedHeight subscribed
24011752 when (parentHeight /= myHeight) $ do
24021753 writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
2403− WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
1754+ WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
24041755 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
24051756 forM_ coincidenceInfos $ \(SomeResetCoincidence subscription mcs) -> do
24061757 unsubscribe subscription
@@ -2441,7 +1792,7 @@ invalidateCoincidenceHeight subscribed = do
24411792 oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
24421793 when (oldHeight /= invalidHeight) $ do
24431794 writeIORef (coincidenceSubscribedHeight subscribed) $! invalidHeight
2444− WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
1795+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
24451796
24461797updateSwitchHeight :: Height -> SwitchSubscribed x a -> IO ()
24471798updateSwitchHeight new subscribed = do
@@ -2449,7 +1800,7 @@ updateSwitchHeight new subscribed = do
24491800 when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
24501801 when (new /= invalidHeight) $ do --TODO: This 'when' should probably be an assertion
24511802 writeIORef (switchSubscribedHeight subscribed) $! new
2452− WeakBag.traverse_ (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
1803+ WeakBag.traverse (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
24531804
24541805recalculateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
24551806recalculateCoincidenceHeight subscribed = do
@@ -2458,7 +1809,7 @@ recalculateCoincidenceHeight subscribed = do
24581809 height <- calculateCoincidenceHeight subscribed
24591810 when (height /= invalidHeight) $ do
24601811 writeIORef (coincidenceSubscribedHeight subscribed) $! height
2461− WeakBag.traverse_ (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
1812+ WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
24621813
24631814calculateSwitchHeight :: SwitchSubscribed x a -> IO Height
24641815calculateSwitchHeight subscribed = getEventSubscribedHeight . _eventSubscription_subscribed =<< readIORef (switchSubscribedCurrentParent subscribed)
@@ -2497,218 +1848,13 @@ invalidate toReconnectRef wis = do
24971848-- Reflex integration
24981849--------------------------------------------------------------------------------
24991850
2500−-- | Designates the default, global Spider timeline
2501−data SpiderTimeline x
2502−type role SpiderTimeline nominal
2503−
2504−-- | The default, global Spider environment
2505−type Spider = SpiderTimeline Global
2506−
2507−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (EventM x) where
2508− {-# INLINABLE sample #-}
2509− sample (SpiderBehavior b) = readBehaviorUntracked b
2510−
2511−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (EventM x) where
2512− {-# INLINABLE hold #-}
2513− hold = holdSpiderEventM
2514− {-# INLINABLE holdDyn #-}
2515− holdDyn = holdDynSpiderEventM
2516− {-# INLINABLE holdIncremental #-}
2517− holdIncremental = holdIncrementalSpiderEventM
2518− {-# INLINABLE buildDynamic #-}
2519− buildDynamic = buildDynamicSpiderEventM
2520− {-# INLINABLE headE #-}
2521− headE = R.slowHeadE
2522−-- headE (SpiderEvent e) = SpiderEvent <$> Reflex.Spider.Internal.headE e
2523− {-# INLINABLE now #-}
2524− now = nowSpiderEventM
2525−
2526−instance Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPullM x) where
2527− {-# INLINABLE sample #-}
2528− sample = coerce . readBehaviorTracked . unSpiderBehavior
2529−
2530−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPushM x) where
2531− {-# INLINABLE sample #-}
2532− sample (SpiderBehavior b) = SpiderPushM $ readBehaviorUntracked b
2533−
2534−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderPushM x) where
2535− {-# INLINABLE hold #-}
2536− hold v0 e = Reflex.Class.current <$> Reflex.Class.holdDyn v0 e
2537− {-# INLINABLE holdDyn #-}
2538− holdDyn v0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce e
2539− {-# INLINABLE holdIncremental #-}
2540− holdIncremental v0 (SpiderEvent e) = SpiderPushM $ SpiderIncremental . dynamicHold <$> Reflex.Spider.Internal.hold v0 e
2541− {-# INLINABLE buildDynamic #-}
2542− buildDynamic getV0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce e
2543− {-# INLINABLE headE #-}
2544− headE = R.slowHeadE
2545−-- headE (SpiderEvent e) = SpiderPushM $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2546− {-# INLINABLE now #-}
2547− now = SpiderPushM nowSpiderEventM
2548−
2549−
2550−instance HasSpiderTimeline x => Monad (Reflex.Class.Dynamic (SpiderTimeline x)) where
2551− {-# INLINE return #-}
2552− return = pure
2553− {-# INLINE (>>=) #-}
2554− x >>= f = SpiderDynamic $ dynamicDynIdentity $ newJoinDyn $ newMapDyn (unSpiderDynamic . f) $ unSpiderDynamic x
2555− {-# INLINE (>>) #-}
2556− (>>) = (*>)
2557−#if !MIN_VERSION_base(4,13,0)
2558− {-# INLINE fail #-}
2559− fail _ = error "Dynamic does not support 'fail'"
2560−#endif
2561−
2562−{-# INLINABLE newJoinDyn #-}
2563−newJoinDyn :: HasSpiderTimeline x => DynamicS x (Identity (DynamicS x (Identity a))) -> Reflex.Spider.Internal.Dyn x (Identity a)
2564−newJoinDyn d =
2565− let readV0 = readBehaviorTracked . dynamicCurrent =<< readBehaviorTracked (dynamicCurrent d)
2566− eOuter = Reflex.Spider.Internal.push (fmap (Just . Identity) . readBehaviorUntracked . dynamicCurrent . runIdentity) $ dynamicUpdated d
2567− eInner = Reflex.Spider.Internal.switch $ dynamicUpdated <$> dynamicCurrent d
2568− eBoth = Reflex.Spider.Internal.coincidence $ dynamicUpdated . runIdentity <$> dynamicUpdated d
2569− v' = unSpiderEvent $ Reflex.Class.leftmost $ map SpiderEvent [eBoth, eOuter, eInner]
2570− in Reflex.Spider.Internal.unsafeBuildDynamic readV0 v'
2571−
2572−instance HasSpiderTimeline x => Functor (Reflex.Class.Dynamic (SpiderTimeline x)) where
2573− fmap = mapDynamicSpider
2574− x <$ d = R.unsafeBuildDynamic (return x) $ x <$ R.updated d
2575−
2576−mapDynamicSpider :: HasSpiderTimeline x => (a -> b) -> Reflex.Class.Dynamic (SpiderTimeline x) a -> Reflex.Class.Dynamic (SpiderTimeline x) b
2577−mapDynamicSpider f = SpiderDynamic . newMapDyn f . unSpiderDynamic
2578−{-# INLINE [1] mapDynamicSpider #-}
2579−
2580−instance HasSpiderTimeline x => Applicative (Reflex.Class.Dynamic (SpiderTimeline x)) where
2581− pure = SpiderDynamic . dynamicConst
2582−#if MIN_VERSION_base(4,10,0)
2583− liftA2 f a b = SpiderDynamic $ Reflex.Spider.Internal.zipDynWith f (unSpiderDynamic a) (unSpiderDynamic b)
1851+#ifndef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
1852+-- When we're specializing, we include this from Reflex.Class instead, because
1853+-- it needs access to these types; when we're not, we want them here, so our
1854+-- instance isn't an orphan instance.
1855+#include "SpiderTimeline.include.hs"
1856+#include "SpiderTimelineHost.include.hs"
25841857#endif
2585− SpiderDynamic a <*> SpiderDynamic b = SpiderDynamic $ Reflex.Spider.Internal.zipDynWith ($) a b
2586− a *> b = R.unsafeBuildDynamic (R.sample $ R.current b) $ R.leftmost [R.updated b, R.tag (R.current b) $ R.updated a]
2587− (<*) = flip (*>) -- There are no effects, so order doesn't matter
2588−
2589−holdSpiderEventM :: HasSpiderTimeline x => a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Behavior (SpiderTimeline x) a)
2590−holdSpiderEventM v0 e = fmap (SpiderBehavior . behaviorHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2591−
2592−holdDynSpiderEventM :: HasSpiderTimeline x => a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Dynamic (SpiderTimeline x) a)
2593−holdDynSpiderEventM v0 e = fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2594−
2595−holdIncrementalSpiderEventM :: (HasSpiderTimeline x, Patch p) => PatchTarget p -> Reflex.Class.Event (SpiderTimeline x) p -> EventM x (Reflex.Class.Incremental (SpiderTimeline x) p)
2596−holdIncrementalSpiderEventM v0 e = fmap (SpiderIncremental . dynamicHold) $ Reflex.Spider.Internal.hold v0 $ unSpiderEvent e
2597−
2598−buildDynamicSpiderEventM :: HasSpiderTimeline x => SpiderPushM x a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Dynamic (SpiderTimeline x) a)
2599−buildDynamicSpiderEventM getV0 e = fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce $ unSpiderEvent e
2600−
2601−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderHost x) where
2602− {-# INLINABLE hold #-}
2603− hold v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.hold v0 e
2604− {-# INLINABLE holdDyn #-}
2605− holdDyn v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.holdDyn v0 e
2606− {-# INLINABLE holdIncremental #-}
2607− holdIncremental v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.holdIncremental v0 e
2608− {-# INLINABLE buildDynamic #-}
2609− buildDynamic getV0 e = runFrame . runSpiderHostFrame $ Reflex.Class.buildDynamic getV0 e
2610− {-# INLINABLE headE #-}
2611− headE e = runFrame . runSpiderHostFrame $ Reflex.Class.headE e
2612− {-# INLINABLE now #-}
2613− now = runFrame . runSpiderHostFrame $ Reflex.Class.now
2614−
2615−
2616−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHostFrame x) where
2617− sample = SpiderHostFrame . readBehaviorUntracked . unSpiderBehavior --TODO: This can cause problems with laziness, so we should get rid of it if we can
2618−
2619−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderHostFrame x) where
2620− {-# INLINABLE hold #-}
2621− hold v0 e = SpiderHostFrame $ fmap (SpiderBehavior . behaviorHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2622− {-# INLINABLE holdDyn #-}
2623− holdDyn v0 e = SpiderHostFrame $ fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2624− {-# INLINABLE holdIncremental #-}
2625− holdIncremental v0 e = SpiderHostFrame $ fmap (SpiderIncremental . dynamicHold) $ Reflex.Spider.Internal.hold v0 $ unSpiderEvent e
2626− {-# INLINABLE buildDynamic #-}
2627− buildDynamic getV0 e = SpiderHostFrame $ fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce $ unSpiderEvent e
2628− {-# INLINABLE headE #-}
2629− headE = R.slowHeadE
2630−-- headE (SpiderEvent e) = SpiderHostFrame $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2631− {-# INLINABLE now #-}
2632− now = SpiderHostFrame Reflex.Class.now
2633−
2634−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHost x) where
2635− {-# INLINABLE sample #-}
2636− sample = runFrame . readBehaviorUntracked . unSpiderBehavior
2637−
2638−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2639− {-# INLINABLE sample #-}
2640− sample = Reflex.Spider.Internal.ReadPhase . Reflex.Class.sample
2641−
2642−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2643− {-# INLINABLE hold #-}
2644− hold v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.hold v0 e
2645− {-# INLINABLE holdDyn #-}
2646− holdDyn v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.holdDyn v0 e
2647− {-# INLINABLE holdIncremental #-}
2648− holdIncremental v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.holdIncremental v0 e
2649− {-# INLINABLE buildDynamic #-}
2650− buildDynamic getV0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.buildDynamic getV0 e
2651− {-# INLINABLE headE #-}
2652− headE e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.headE e
2653− {-# INLINABLE now #-}
2654− now = Reflex.Spider.Internal.ReadPhase Reflex.Class.now
2655−
2656−--------------------------------------------------------------------------------
2657−-- Deprecated items
2658−--------------------------------------------------------------------------------
2659−
2660−-- | 'SpiderEnv' is the old name for 'SpiderTimeline'
2661−{-# DEPRECATED SpiderEnv "Use 'SpiderTimelineEnv' instead" #-}
2662−type SpiderEnv = SpiderTimeline
2663−instance HasSpiderTimeline x => Reflex.Host.Class.MonadSubscribeEvent (SpiderTimeline x) (SpiderHostFrame x) where
2664− {-# INLINABLE subscribeEvent #-}
2665− subscribeEvent e = SpiderHostFrame $ do
2666− --TODO: Unsubscribe eventually (manually and/or with weak ref)
2667− val <- liftIO $ newIORef Nothing
2668− subscription <- subscribe (unSpiderEvent e) $ Subscriber
2669− { subscriberPropagate = \a -> do
2670− liftIO $ writeIORef val $ Just a
2671− scheduleClear val
2672− , subscriberInvalidateHeight = \_ -> return ()
2673− , subscriberRecalculateHeight = \_ -> return ()
2674− }
2675− return $ SpiderEventHandle
2676− { spiderEventHandleSubscription = subscription
2677− , spiderEventHandleValue = val
2678− }
2679−
2680−instance HasSpiderTimeline x => Reflex.Host.Class.ReflexHost (SpiderTimeline x) where
2681− type EventTrigger (SpiderTimeline x) = RootTrigger x
2682− type EventHandle (SpiderTimeline x) = SpiderEventHandle x
2683− type HostFrame (SpiderTimeline x) = SpiderHostFrame x
2684−
2685−instance HasSpiderTimeline x => Reflex.Host.Class.MonadReadEvent (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2686− {-# NOINLINE readEvent #-}
2687− readEvent h = Reflex.Spider.Internal.ReadPhase $ fmap (fmap return) $ liftIO $ do
2688− result <- readIORef $ spiderEventHandleValue h
2689− touch h
2690− return result
2691−
2692−instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHost x) where
2693− newEventWithTrigger = SpiderHost . fmap SpiderEvent . newEventWithTriggerIO
2694− newFanEventWithTrigger f = SpiderHost $ do
2695− es <- newFanEventWithTriggerIO f
2696− return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
2697−
2698−instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHostFrame x) where
2699− newEventWithTrigger = SpiderHostFrame . EventM . liftIO . fmap SpiderEvent . newEventWithTriggerIO
2700− newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
2701− es <- newFanEventWithTriggerIO f
2702− return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
2703−
2704−instance HasSpiderTimeline x => Reflex.Host.Class.MonadSubscribeEvent (SpiderTimeline x) (SpiderHost x) where
2705− {-# INLINABLE subscribeEvent #-}
2706− subscribeEvent = runFrame . runSpiderHostFrame . Reflex.Host.Class.subscribeEvent
2707−
2708−instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexHost (SpiderTimeline x) (SpiderHost x) where
2709− type ReadPhase (SpiderHost x) = Reflex.Spider.Internal.ReadPhase x
2710− fireEventsAndRead es (Reflex.Spider.Internal.ReadPhase a) = run es a
2711− runHostFrame = runFrame . runSpiderHostFrame
27121858
27131859unsafeNewSpiderTimelineEnv :: forall x. IO (SpiderTimelineEnv x)
27141860unsafeNewSpiderTimelineEnv = do
@@ -2717,7 +1863,7 @@ unsafeNewSpiderTimelineEnv = do
27171863#ifdef DEBUG
27181864 depthRef <- newIORef 0
27191865#endif
2720− return $ STE $ SpiderTimelineEnv
1866+ return $ SpiderTimelineEnv
27211867 { _spiderTimeline_lock = lock
27221868 , _spiderTimeline_eventEnv = env
27231869#ifdef DEBUG
@@ -2725,40 +1871,41 @@ unsafeNewSpiderTimelineEnv = do
27251871#endif
27261872 }
27271873
1874+#ifndef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
27281875-- | Create a new SpiderTimelineEnv
27291876newSpiderTimeline :: IO (Some SpiderTimelineEnv)
2730−newSpiderTimeline = withSpiderTimeline (pure . Some)
1877+newSpiderTimeline = withSpiderTimeline (pure . Some.This)
27311878
2732−data LocalSpiderTimeline (x :: Type) s
1879+data LocalSpiderTimeline x s
27331880
27341881instance Reifies s (SpiderTimelineEnv x) =>
27351882 HasSpiderTimeline (LocalSpiderTimeline x s) where
2736− spiderTimeline = localSpiderTimeline Proxy $ reflect (Proxy :: Proxy s)
1883+ spiderTimeline = localSpiderTimeline (Proxy :: Proxy s) $ reflect (Proxy :: Proxy s)
27371884
27381885localSpiderTimeline
2739− :: proxy s
1886+ :: Proxy s
27401887 -> SpiderTimelineEnv x
27411888 -> SpiderTimelineEnv (LocalSpiderTimeline x s)
2742−localSpiderTimeline _ = coerce
1889+localSpiderTimeline _ = unsafeCoerce
27431890
27441891-- | Pass a new timeline to the given function.
27451892withSpiderTimeline :: (forall x. HasSpiderTimeline x => SpiderTimelineEnv x -> IO r) -> IO r
27461893withSpiderTimeline k = do
27471894 env <- unsafeNewSpiderTimelineEnv
27481895 reify env $ \s -> k $ localSpiderTimeline s env
1896+#endif
27491897
2750−newtype SpiderPullM (x :: Type) a = SpiderPullM (BehaviorM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2751−
2752−type ComputeM = EventM
1898+newtype SpiderPullM x a = SpiderPullM (BehaviorM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
27531899
2754−newtype SpiderPushM (x :: Type) a = SpiderPushM (ComputeM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
1900+newtype SpiderPushM x a = SpiderPushM (ComputeM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
27551901
1902+#ifndef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
27561903instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
27571904 {-# SPECIALIZE instance R.Reflex (SpiderTimeline Global) #-}
27581905 newtype Behavior (SpiderTimeline x) a = SpiderBehavior { unSpiderBehavior :: Behavior x a }
27591906 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 }
1907+ newtype Dynamic (SpiderTimeline x) a = SpiderDynamic { unSpiderDynamic :: Dynamic x (Identity a) } -- deriving (Functor, Applicative, Monad)
1908+ newtype Incremental (SpiderTimeline x) p = SpiderIncremental { unSpiderIncremental :: Dynamic x p }
27621909 type PullM (SpiderTimeline x) = SpiderPullM x
27631910 type PushM (SpiderTimeline x) = SpiderPushM x
27641911 {-# INLINABLE never #-}
@@ -2767,19 +1914,12 @@ instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
27671914 constant = SpiderBehavior . behaviorConst
27681915 {-# INLINE push #-}
27691916 push f = SpiderEvent . push (coerce f) . unSpiderEvent
2770− {-# INLINE pushCheap #-}
2771− pushCheap f = SpiderEvent . pushCheap (coerce f) . unSpiderEvent
27721917 {-# INLINABLE pull #-}
27731918 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
1919+ {-# INLINABLE merge #-}
1920+ merge = SpiderEvent . merge . dynamicConst . (coerce :: DMap k (R.Event (SpiderTimeline x)) -> DMap k (Event x))
1921+ {-# INLINABLE fan #-}
1922+ fan e = R.EventSelector $ SpiderEvent . select (fan (unSpiderEvent e))
27831923 {-# INLINABLE switch #-}
27841924 switch = SpiderEvent . switch . (coerce :: Behavior x (R.Event (SpiderTimeline x) a) -> Behavior x (Event x a)) . unSpiderBehavior
27851925 {-# INLINABLE coincidence #-}
@@ -2787,31 +1927,25 @@ instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
27871927 {-# INLINABLE current #-}
27881928 current = SpiderBehavior . dynamicCurrent . unSpiderDynamic
27891929 {-# INLINABLE updated #-}
2790− updated = SpiderEvent #. dynamicUpdated .# fmap coerce . unSpiderDynamic
1930+ updated = SpiderEvent . fmap runIdentity . dynamicUpdated . unSpiderDynamic
27911931 {-# INLINABLE unsafeBuildDynamic #-}
2792− unsafeBuildDynamic readV0 v' = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (coerce readV0) $ coerce $ unSpiderEvent v'
1932+ unsafeBuildDynamic readV0 v' = SpiderDynamic $ dynamicDynIdentity $ unsafeDyn (coerce readV0) $ coerce $ unSpiderEvent v'
27931933 {-# 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
1934+ unsafeBuildIncremental readV0 dv = SpiderIncremental $ dynamicDyn $ unsafeDyn (coerce readV0) $ unSpiderEvent dv
1935+ {-# INLINABLE mergeIncremental #-}
1936+ mergeIncremental = SpiderEvent . merge . (unsafeCoerce :: Dynamic x (PatchDMap k (R.Event (SpiderTimeline x))) -> Dynamic x (PatchDMap k (Event x))) . unSpiderIncremental
27991937 {-# INLINABLE currentIncremental #-}
28001938 currentIncremental = SpiderBehavior . dynamicCurrent . unSpiderIncremental
28011939 {-# INLINABLE updatedIncremental #-}
28021940 updatedIncremental = SpiderEvent . dynamicUpdated . unSpiderIncremental
28031941 {-# INLINABLE incrementalToDynamic #-}
2804− incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (readBehaviorUntracked $ dynamicCurrent i) $ flip push (dynamicUpdated i) $ \p -> do
1942+ incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ dynamicDynIdentity $ unsafeDyn (readBehaviorUntracked $ dynamicCurrent i) $ flip push (dynamicUpdated i) $ \p -> do
28051943 c <- readBehaviorUntracked $ dynamicCurrent i
28061944 return $ Identity <$> apply p c --TODO: Avoid the redundant 'apply'
28071945 eventCoercion Coercion = Coercion
28081946 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))
1947+ dynamicCoercion = unsafeCoerce --TODO: How can we avoid this unsafeCoerce? This is safe only because we know how Identity works as a Patch instance
1948+#endif
28151949
28161950data RootTrigger x a = forall k. GCompare k => RootTrigger (WeakBag (Subscriber x a), IORef (DMap k Identity), k a)
28171951
@@ -2834,7 +1968,7 @@ instance MonadAtomicRef (EventM x) where
28341968 atomicModifyRef r f = liftIO $ atomicModifyRef r f
28351969
28361970-- | 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)
1971+newtype SpiderHost x a = SpiderHost { unSpiderHost :: ReaderT (SpiderTimelineEnv x) IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
28381972
28391973instance Monad (SpiderHost x) where
28401974 {-# INLINABLE (>>=) #-}
@@ -2843,27 +1977,22 @@ instance Monad (SpiderHost x) where
28431977 SpiderHost x >> SpiderHost y = SpiderHost $ x >> y
28441978 {-# INLINABLE return #-}
28451979 return x = SpiderHost $ return x
2846−#if !MIN_VERSION_base(4,13,0)
2847− {-# INLINABLE fail #-}
2848− fail = MonadFail.fail
2849−#endif
2850−
2851−instance MonadFail (SpiderHost x) where
28521980 {-# INLINABLE fail #-}
2853− fail s = SpiderHost $ MonadFail.fail s
1981+ fail s = SpiderHost $ fail s
28541982
28551983-- | Run an action affecting the global Spider timeline; this will be guarded by
28561984-- a mutex for that timeline
28571985runSpiderHost :: SpiderHost Global a -> IO a
2858−runSpiderHost (SpiderHost a) = a
1986+runSpiderHost (SpiderHost a) = runReaderT a globalSpiderTimelineEnv
28591987
1988+#ifndef SPECIALIZE_TO_SPIDERTIMELINE_GLOBAL
28601989-- | Run an action affecting a given Spider timeline; this will be guarded by a
28611990-- mutex for that timeline
28621991runSpiderHostForTimeline :: SpiderHost x a -> SpiderTimelineEnv x -> IO a
2863−runSpiderHostForTimeline (SpiderHost a) _ = a
1992+runSpiderHostForTimeline (SpiderHost a) = runReaderT a
1993+#endif
28641994
2865−newtype SpiderHostFrame (x :: Type) a = SpiderHostFrame { runSpiderHostFrame :: EventM x a }
2866− deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
1995+newtype SpiderHostFrame x a = SpiderHostFrame { runSpiderHostFrame :: EventM x a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
28671996
28681997instance Monad (SpiderHostFrame x) where
28691998 {-# INLINABLE (>>=) #-}
@@ -2872,21 +2001,15 @@ instance Monad (SpiderHostFrame x) where
28722001 SpiderHostFrame x >> SpiderHostFrame y = SpiderHostFrame $ x >> y
28732002 {-# INLINABLE return #-}
28742003 return x = SpiderHostFrame $ return x
2875−#if !MIN_VERSION_base(4,13,0)
28762004 {-# INLINABLE fail #-}
28772005 fail s = SpiderHostFrame $ fail s
2878−#endif
2879−
2880−instance NotReady (SpiderTimeline x) (SpiderHostFrame x) where
2881− notReadyUntil _ = pure ()
2882− notReady = pure ()
28832006
2884−newEventWithTriggerIO :: forall x a. HasSpiderTimeline x => (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
2007+newEventWithTriggerIO :: (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
28852008newEventWithTriggerIO f = do
28862009 es <- newFanEventWithTriggerIO $ \Refl -> f
28872010 return $ select es Refl
28882011
2889−newFanEventWithTriggerIO :: (HasSpiderTimeline x, GCompare k) => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
2012+newFanEventWithTriggerIO :: GCompare k => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
28902013newFanEventWithTriggerIO f = do
28912014 occRef <- newIORef DMap.empty
28922015 subscribedRef <- newIORef DMap.empty
@@ -2920,11 +2043,3 @@ instance MonadAtomicRef (SpiderHostFrame x) where
29202043instance PrimMonad (SpiderHostFrame x) where
29212044 type PrimState (SpiderHostFrame x) = PrimState IO
29222045 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 ()