@@ -1,2666 +0,0 @@
1−{-# LANGUAGE BangPatterns #-}
3−{-# LANGUAGE ConstraintKinds #-}
4−{-# LANGUAGE EmptyDataDecls #-}
5−{-# LANGUAGE ExistentialQuantification #-}
6−{-# LANGUAGE FlexibleContexts #-}
7−{-# LANGUAGE FlexibleInstances #-}
8−{-# LANGUAGE FunctionalDependencies #-}
10−{-# LANGUAGE GeneralizedNewtypeDeriving #-}
11−{-# LANGUAGE LambdaCase #-}
12−{-# LANGUAGE MultiParamTypeClasses #-}
13−{-# LANGUAGE MultiWayIf #-}
14−{-# LANGUAGE RankNTypes #-}
15−{-# LANGUAGE RoleAnnotations #-}
16−{-# LANGUAGE ScopedTypeVariables #-}
17−{-# LANGUAGE TypeFamilies #-}
18−{-# LANGUAGE TypeOperators #-}
19−{-# LANGUAGE UndecidableInstances #-}
20−{-# LANGUAGE PolyKinds #-}
21−{-# LANGUAGE InstanceSigs #-}
22−#ifdef USE_REFLEX_OPTIMIZER
23−{-# OPTIONS_GHC -fplugin=Reflex.Optimizer #-}
25−{-# OPTIONS_GHC -Wunused-binds #-}
26−-- | This module is the implementation of the 'Spider' 'Reflex' engine. It uses
27−-- a graph traversal algorithm to propagate 'Event's and 'Behavior's.
28−module Reflex.Spider.Internal (module Reflex.Spider.Internal) where
30−#if MIN_VERSION_base(4,10,0)
31−import Control.Applicative (liftA2)
33−import Control.Concurrent
34−import Control.Exception
35−import Control.Monad hiding (forM, forM_, mapM, mapM_)
36−import Control.Monad.Exception
37−import Control.Monad.Identity hiding (forM, forM_, mapM, mapM_)
38−import Control.Monad.Primitive
39−import Control.Monad.Reader hiding (forM, forM_, mapM, mapM_)
40−import Control.Monad.Ref
43−import Data.Dependent.Map (DMap, DSum (..))
44−import qualified Data.Dependent.Map as DMap
45−import Data.FastMutableIntMap (FastMutableIntMap, PatchIntMap (..))
46−import qualified Data.FastMutableIntMap as FastMutableIntMap
47−import Data.Foldable hiding (concat, elem, sequence_)
48−import Data.Functor.Constant
49−import Data.Functor.Misc
50−import Data.Functor.Product
51−import Data.GADT.Compare
52−import Data.IntMap.Strict (IntMap)
53−import qualified Data.IntMap.Strict as IntMap
55−import Data.Kind (Type)
56−import Data.Maybe hiding (mapMaybe)
57−import Data.Monoid ((<>))
60−import Data.Traversable
61−import Data.Witherable (Filterable, mapMaybe)
63−import GHC.IORef (IORef (..))
65−import Reflex.FastWeak
66−import System.IO.Unsafe
67−import System.Mem.Weak
71−import Control.Monad.State hiding (forM, forM_, mapM, mapM_, sequence)
72−import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
73−import qualified Data.List.NonEmpty as NonEmpty
74−import Data.Monoid (mempty)
75−import Data.Tree (Forest, Tree (..), drawForest)
78−import Data.FastWeakBag (FastWeakBag)
79−import qualified Data.FastWeakBag as FastWeakBag
80−import Data.Reflection
81−import Data.Some (Some)
82−import qualified Data.Some as Some
83−import Data.Type.Coercion
84−import Data.Profunctor.Unsafe ((#.), (.#))
85−import Data.WeakBag (WeakBag, WeakBagTicket, _weakBag_children)
86−import qualified Data.WeakBag as WeakBag
87−import qualified Reflex.Class
88−import qualified Reflex.Class as R
89−import qualified Reflex.Host.Class
90−import Reflex.NotReady.Class
92−import qualified Reflex.Patch.DMapWithMove as PatchDMapWithMove
94−#ifdef DEBUG_TRACE_EVENTS
95−import qualified Data.ByteString.Char8 as BS8
96−import System.IO (stderr)
99−#ifdef DEBUG_TRACE_EVENTS
101−withStackOneLine :: (BS8.ByteString -> a) -> a
102−withStackOneLine expr = unsafePerformIO $ do
103− stack <- currentCallStack
104− return (expr (BS8.pack (unwords (reverse stack))))
108−debugPropagate :: Bool
110−debugInvalidateHeight :: Bool
112−debugInvalidate :: Bool
116−#define DEBUG_NODEIDS
118−debugPropagate = True
120−debugInvalidateHeight = False
122−debugInvalidate = True
124−class HasNodeId a where
125− getNodeId :: a -> Int
127−instance HasNodeId (Hold x p a) where
128− getNodeId = holdNodeId
130−instance HasNodeId (PushSubscribed x a b) where
131− getNodeId = pushSubscribedNodeId
133−instance HasNodeId (SwitchSubscribed x a) where
134− getNodeId = switchSubscribedNodeId
136−instance HasNodeId (FanSubscribed x a) where
137− getNodeId = fanSubscribedNodeId
139−instance HasNodeId (CoincidenceSubscribed x a) where
140− getNodeId = coincidenceSubscribedNodeId
142−instance HasNodeId (RootSubscribed x a) where
143− getNodeId = rootSubscribedNodeId
145−instance HasNodeId (Pull x a) where
146− getNodeId = pullNodeId
148−{-# INLINE showNodeId #-}
149−showNodeId :: HasNodeId a => a -> String
150−showNodeId = ("#"<>) . show . getNodeId
152−showSubscriberType :: Subscriber x a -> String
153−showSubscriberType = \case
154− SubscriberPush _ _ -> "SubscriberPush"
155− SubscriberMerge _ _ -> "SubscriberMerge"
156− SubscriberFan _ -> "SubscriberFan"
157− SubscriberMergeChange _ -> "SubscriberMergeChange"
158− SubscriberHold _ -> "SubscriberHold"
159− SubscriberHoldIdentity _ -> "SubscriberHoldIdentity"
160− SubscriberSwitch _ -> "SubscriberSwitch"
161− SubscriberCoincidenceOuter _ -> "SubscriberCoincidenceOuter"
162− SubscriberCoincidenceInner _ -> "SubscriberCoincidenceInner"
163− SubscriberHandle -> "SubscriberHandle"
165−showEventType :: Event x a -> String
166−showEventType = \case
167− EventRoot _ _ -> "EventRoot"
168− EventNever -> "EventNever"
169− EventPush _ -> "EventPush"
170− EventMerge _ -> "EventMerge"
171− EventFan _ _ -> "EventFan"
172− EventSwitch _ -> "EventSwitch"
173− EventCoincidence _ -> "EventCoincidence"
174− EventHold _ -> "EventHold"
175− EventDyn _ -> "EventDyn"
176− EventHoldIdentity _ -> "EventHoldIdentity"
177− EventDynIdentity _ -> "EventDynIdentity"
181−debugPropagate = False
183−debugInvalidateHeight = False
185−debugInvalidate = False
187−-- This must be inline, or error messages will cause memory leaks due to retaining the node in question
188−{-# INLINE showNodeId #-}
189−showNodeId :: a -> String
195−{-# NOINLINE nextNodeIdRef #-}
196−nextNodeIdRef :: IORef Int
197−nextNodeIdRef = unsafePerformIO $ newIORef 1
200−newNodeId = atomicModifyIORef' nextNodeIdRef $ \n -> (succ n, n)
202−{-# NOINLINE unsafeNodeId #-}
203−unsafeNodeId :: a -> Int
204−unsafeNodeId a = unsafePerformIO $ do
209−--------------------------------------------------------------------------------
211−--------------------------------------------------------------------------------
213−--NB: Once you subscribe to an Event, you must always hold on the the WHOLE EventSubscription you get back
214−-- If you do not retain the subscription, you may be prematurely unsubscribed from the parent event.
215−data EventSubscription x = EventSubscription
216− { _eventSubscription_unsubscribe :: !(IO ())
217− , _eventSubscription_subscribed :: {-# UNPACK #-} !(EventSubscribed x)
220−unsubscribe :: EventSubscription x -> IO ()
221−unsubscribe (EventSubscription u _) = u
223−--------------------------------------------------------------------------------
225−--------------------------------------------------------------------------------
227−newtype Event x a = Event { unEvent :: Subscriber x a -> EventM x (EventSubscription x, Maybe a) }
229−{-# INLINE subscribeAndRead #-}
230−subscribeAndRead :: Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
231−subscribeAndRead = unEvent
234−"cacheEvent/cacheEvent" forall e. cacheEvent (cacheEvent e) = cacheEvent e
235−"cacheEvent/pushCheap" forall f e. pushCheap f (cacheEvent e) = cacheEvent (pushCheap f e)
236−"hold/cacheEvent" forall f e. hold f (cacheEvent e) = hold f e
239−-- | Construct an 'Event' equivalent to that constructed by 'push', but with no
240−-- caching; if the computation function is very cheap, this is (much) more
241−-- efficient than 'push'
242−{-# INLINE [1] pushCheap #-}
243−pushCheap :: (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
244−pushCheap !f e = Event $ \sub -> do
245− (subscription, occ) <- subscribeAndRead e $ sub
246− { subscriberPropagate = \a -> do
248− mapM_ (subscriberPropagate sub) mb
250− occ' <- join <$> mapM f occ
251− return (subscription, occ')
253−-- | A subscriber that never triggers other 'Event's
254−{-# INLINE terminalSubscriber #-}
255−terminalSubscriber :: (a -> EventM x ()) -> Subscriber x a
256−terminalSubscriber p = Subscriber
257− { subscriberPropagate = p
258− , subscriberInvalidateHeight = \_ -> return ()
259− , subscriberRecalculateHeight = \_ -> return ()
262−-- | Subscribe to an Event only for the duration of one occurrence
263−{-# INLINE subscribeAndReadHead #-}
264−subscribeAndReadHead :: Event x a -> Subscriber x a -> EventM x (EventSubscription x, Maybe a)
265−subscribeAndReadHead e sub = do
266− subscriptionRef <- liftIO $ newIORef $ error "subscribeAndReadHead: not initialized"
267− (subscription, occ) <- subscribeAndRead e $ sub
268− { subscriberPropagate = \a -> do
269− liftIO $ unsubscribe =<< readIORef subscriptionRef
270− subscriberPropagate sub a
272− liftIO $ case occ of
273− Nothing -> writeIORef subscriptionRef $! subscription
274− Just _ -> unsubscribe subscription
275− return (subscription, occ)
277−--TODO: Make this lazy in its input event
278−headE :: (MonadIO m, Defer (SomeMergeInit x) m) => Event x a -> m (Event x a)
280− parent <- liftIO $ newIORef $ Just originalE
281− defer $ SomeMergeInit $ do --TODO: Rename SomeMergeInit appropriately
282− let clearParent = liftIO $ writeIORef parent Nothing
283− (_, occ) <- subscribeAndReadHead originalE $ terminalSubscriber $ \_ -> clearParent
284− when (isJust occ) clearParent
285− return $ Event $ \sub -> do
286− liftIO (readIORef parent) >>= \case
287− Nothing -> return (EventSubscription (return ()) $ EventSubscribed zeroRef $ toAny (), Nothing)
288− Just e -> subscribeAndReadHead e sub
290−data CacheSubscribed x a
291− = CacheSubscribed { _cacheSubscribed_subscribers :: {-# UNPACK #-} !(FastWeakBag (Subscriber x a))
292− , _cacheSubscribed_parent :: {-# UNPACK #-} !(EventSubscription x)
293− , _cacheSubscribed_occurrence :: {-# UNPACK #-} !(IORef (Maybe a))
296−-- | Construct an 'Event' whose value is guaranteed not to be recomputed
299−--TODO: Try a caching strategy where we subscribe directly to the parent when
300−--there's only one subscriber, and then build our own FastWeakBag only when a second
302−{-# NOINLINE [0] cacheEvent #-}
303−cacheEvent :: forall x a. HasSpiderTimeline x => Event x a -> Event x a
305−#ifdef DEBUG_TRACE_EVENTS
306− withStackOneLine $ \callSite -> Event $
310− let mSubscribedRef :: IORef (FastWeak (CacheSubscribed x a))
311− !mSubscribedRef = unsafeNewIORef e emptyFastWeak
312− in \sub -> {-# SCC "cacheEvent" #-} do
313−#ifdef DEBUG_TRACE_EVENTS
314− unless (BS8.null callSite) $ liftIO $ BS8.hPutStrLn stderr callSite
316− subscribedTicket <- liftIO (readIORef mSubscribedRef >>= getFastWeakTicket) >>= \case
317− Just subscribedTicket -> return subscribedTicket
319− subscribers <- liftIO FastWeakBag.empty
320− occRef <- liftIO $ newIORef Nothing -- This should never be read prior to being set below
321− (parentSub, occ) <- subscribeAndRead e $ Subscriber
322− { subscriberPropagate = \a -> do
323− liftIO $ writeIORef occRef $ Just a
324− scheduleClear occRef
325− propagateFast a subscribers
326− , subscriberInvalidateHeight = \old -> do
327− FastWeakBag.traverse subscribers $ invalidateSubscriberHeight old
328− , subscriberRecalculateHeight = \new -> do
329− FastWeakBag.traverse subscribers $ recalculateSubscriberHeight new
331− when (isJust occ) $ do
332− liftIO $ writeIORef occRef occ -- Set the initial value of occRef; we don't need to do this if occ is Nothing
333− scheduleClear occRef
334− let !subscribed = CacheSubscribed
335− { _cacheSubscribed_subscribers = subscribers
336− , _cacheSubscribed_parent = parentSub
337− , _cacheSubscribed_occurrence = occRef
339− subscribedTicket <- liftIO $ mkFastWeakTicket subscribed
340− liftIO $ writeIORef mSubscribedRef =<< getFastWeakTicketWeak subscribedTicket
341− return subscribedTicket
343− subscribed <- getFastWeakTicketValue subscribedTicket
344− ticket <- FastWeakBag.insert sub $ _cacheSubscribed_subscribers subscribed
345− occ <- readIORef $ _cacheSubscribed_occurrence subscribed
346− let es = EventSubscription
347− { _eventSubscription_unsubscribe = do
348− FastWeakBag.remove ticket
349− isEmpty <- FastWeakBag.isEmpty $ _cacheSubscribed_subscribers subscribed
351− writeIORef mSubscribedRef emptyFastWeak
352− unsubscribe $ _cacheSubscribed_parent subscribed
354− touch subscribedTicket
355− , _eventSubscription_subscribed = EventSubscribed
356− { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ _cacheSubscribed_parent subscribed
357− , eventSubscribedRetained = toAny subscribedTicket
362−subscribe :: Event x a -> Subscriber x a -> EventM x (EventSubscription x)
363−subscribe e s = fst <$> subscribeAndRead e s
366−wrap :: MonadIO m => (t -> EventSubscribed x) -> (Subscriber x a -> m (WeakBagTicket, t, Maybe a)) -> Subscriber x a -> m (EventSubscription x, Maybe a)
367−wrap tag getSpecificSubscribed sub = do
368− (sln, subd, occ) <- getSpecificSubscribed sub
370− return (EventSubscription (WeakBag.remove sln >> touch sln) es, occ)
372−eventRoot :: GCompare k => k a -> Root x k -> Event x a
373−eventRoot !k !r = Event $ wrap eventSubscribedRoot $ liftIO . getRootSubscribed k r
375−eventNever :: Event x a
376−eventNever = Event $ \_ -> return (EventSubscription (return ()) eventSubscribedNever, Nothing)
378−eventFan :: (GCompare k, HasSpiderTimeline x) => k a -> Fan x k -> Event x a
379−eventFan !k !f = Event $ wrap eventSubscribedFan $ getFanSubscribed k f
381−eventSwitch :: HasSpiderTimeline x => Switch x a -> Event x a
382−eventSwitch !s = Event $ wrap eventSubscribedSwitch $ getSwitchSubscribed s
384−eventCoincidence :: HasSpiderTimeline x => Coincidence x a -> Event x a
385−eventCoincidence !c = Event $ wrap eventSubscribedCoincidence $ getCoincidenceSubscribed c
387−eventHold :: Hold x p -> Event x p
388−eventHold !h = Event $ subscribeHoldEvent h
390−eventDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> Event x p
391−eventDyn !j = Event $ \sub -> getDynHold j >>= \h -> subscribeHoldEvent h sub
393−{-# INLINE subscribeCoincidenceInner #-}
394−subscribeCoincidenceInner :: HasSpiderTimeline x => Event x a -> Height -> CoincidenceSubscribed x a -> EventM x (Maybe a, Height, EventSubscribed x)
395−subscribeCoincidenceInner inner outerHeight subscribedUnsafe = do
396− subInner <- liftIO $ newSubscriberCoincidenceInner subscribedUnsafe
397− (subscription@(EventSubscription _ innerSubd), innerOcc) <- subscribeAndRead inner subInner
398− innerHeight <- liftIO $ getEventSubscribedHeight innerSubd
399− let height = max innerHeight outerHeight
400− defer $ SomeResetCoincidence subscription $ if height > outerHeight then Just subscribedUnsafe else Nothing
401− return (innerOcc, height, innerSubd)
403−--------------------------------------------------------------------------------
405−--------------------------------------------------------------------------------
407−data Subscriber x a = Subscriber
408− { subscriberPropagate :: !(a -> EventM x ())
409− , subscriberInvalidateHeight :: !(Height -> IO ())
410− , subscriberRecalculateHeight :: !(Height -> IO ())
413−--TODO: Move this comment to WeakBag
414−-- These function are constructor functions that are marked NOINLINE so they are
415−-- opaque to GHC. If we do not do this, then GHC will sometimes fuse the constructor away
416−-- so any weak references that are attached to the constructors will have their
417−-- finalizer run. Using the opaque constructor, does not see the
418−-- constructor application, so it behaves like an IORef and cannot be fused away.
420−-- The result is also evaluated to WHNF, since forcing a thunk invalidates
421−-- the weak pointer to it in some cases.
423−newSubscriberHold :: (HasSpiderTimeline x, Patch p) => Hold x p -> IO (Subscriber x p)
424−newSubscriberHold h = return $ Subscriber
425− { subscriberPropagate = {-# SCC "traverseHold" #-} propagateSubscriberHold h
426− , subscriberInvalidateHeight = \_ -> return ()
427− , subscriberRecalculateHeight = \_ -> return ()
430−newSubscriberFan :: forall x k. (HasSpiderTimeline x, GCompare k) => FanSubscribed x k -> IO (Subscriber x (DMap k Identity))
431−newSubscriberFan subscribed = return $ Subscriber
432− { subscriberPropagate = \a -> {-# SCC "traverseFan" #-} do
433− subs <- liftIO $ readIORef $ fanSubscribedSubscribers subscribed
434− tracePropagate (Proxy :: Proxy x) $ "SubscriberFan" <> showNodeId subscribed <> ": " ++ show (DMap.size subs) ++ " keys subscribed, " ++ show (DMap.size a) ++ " keys firing"
435− liftIO $ writeIORef (fanSubscribedOccurrence subscribed) $ Just a
436− scheduleClear $ fanSubscribedOccurrence subscribed
437− let f _ (Pair (Identity v) subsubs) = do
438− propagate v $ _fanSubscribedChildren_list subsubs
439− return $ Constant ()
440− _ <- DMap.traverseWithKey f $ DMap.intersectionWithKey (\_ -> Pair) a subs --TODO: Would be nice to have DMap.traverse_
442− , subscriberInvalidateHeight = \old -> do
443− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
444− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
445− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ invalidateSubscriberHeight old
446− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
447− , subscriberRecalculateHeight = \new -> do
448− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed
449− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
450− forM_ (DMap.toList subscribers) $ \(_ :=> v) -> WeakBag.traverse (_fanSubscribedChildren_list v) $ recalculateSubscriberHeight new
451− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberFan" <> showNodeId subscribed <> " done"
454−newSubscriberSwitch :: forall x a. HasSpiderTimeline x => SwitchSubscribed x a -> IO (Subscriber x a)
455−newSubscriberSwitch subscribed = return $ Subscriber
456− { subscriberPropagate = \a -> {-# SCC "traverseSwitch" #-} do
457− tracePropagate (Proxy :: Proxy x) $ "SubscriberSwitch" <> showNodeId subscribed
458− liftIO $ writeIORef (switchSubscribedOccurrence subscribed) $ Just a
459− scheduleClear $ switchSubscribedOccurrence subscribed
460− propagate a $ switchSubscribedSubscribers subscribed
461− , subscriberInvalidateHeight = \_ -> do
462− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
463− oldHeight <- readIORef $ switchSubscribedHeight subscribed
464− when (oldHeight /= invalidHeight) $ do
465− writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
466− WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
467− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
468− , subscriberRecalculateHeight = \new -> do
469− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed
470− updateSwitchHeight new subscribed
471− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberSwitch" <> showNodeId subscribed <> " done"
474−newSubscriberCoincidenceOuter :: forall x b. HasSpiderTimeline x => CoincidenceSubscribed x b -> IO (Subscriber x (Event x b))
475−newSubscriberCoincidenceOuter subscribed = return $ Subscriber
476− { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceOuter" #-} do
477− tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceOuter" <> showNodeId subscribed
478− outerHeight <- liftIO $ readIORef $ coincidenceSubscribedHeight subscribed
479− tracePropagate (Proxy :: Proxy x) $ " outerHeight = " <> show outerHeight
480− (occ, innerHeight, innerSubd) <- subscribeCoincidenceInner a outerHeight subscribed
481− tracePropagate (Proxy :: Proxy x) $ " isJust occ = " <> show (isJust occ)
482− tracePropagate (Proxy :: Proxy x) $ " innerHeight = " <> show innerHeight
483− liftIO $ writeIORef (coincidenceSubscribedInnerParent subscribed) $ Just innerSubd
484− scheduleClear $ coincidenceSubscribedInnerParent subscribed
487− when (innerHeight > outerHeight) $ liftIO $ do -- If the event fires, it will fire at a later height
488− writeIORef (coincidenceSubscribedHeight subscribed) $! innerHeight
489− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight outerHeight
490− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight innerHeight
491− Just o -> do -- Since it's already firing, no need to adjust height
492− liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) occ
493− scheduleClear $ coincidenceSubscribedOccurrence subscribed
494− propagate o $ coincidenceSubscribedSubscribers subscribed
495− , subscriberInvalidateHeight = \_ -> do
496− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
497− invalidateCoincidenceHeight subscribed
498− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
499− , subscriberRecalculateHeight = \_ -> do
500− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed
501− recalculateCoincidenceHeight subscribed
502− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceOuter" <> showNodeId subscribed <> " done"
505−newSubscriberCoincidenceInner :: forall x a. HasSpiderTimeline x => CoincidenceSubscribed x a -> IO (Subscriber x a)
506−newSubscriberCoincidenceInner subscribed = return $ Subscriber
507− { subscriberPropagate = \a -> {-# SCC "traverseCoincidenceInner" #-} do
508− tracePropagate (Proxy :: Proxy x) $ "SubscriberCoincidenceInner" <> showNodeId subscribed
509− occ <- liftIO $ readIORef $ coincidenceSubscribedOccurrence subscribed
511− Just _ -> return () -- SubscriberCoincidenceOuter must have already propagated this event
513− liftIO $ writeIORef (coincidenceSubscribedOccurrence subscribed) $ Just a
514− scheduleClear $ coincidenceSubscribedOccurrence subscribed
515− propagate a $ coincidenceSubscribedSubscribers subscribed
516− , subscriberInvalidateHeight = \_ -> do
517− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
518− invalidateCoincidenceHeight subscribed
519− when debugInvalidateHeight $ putStrLn $ "invalidateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
520− , subscriberRecalculateHeight = \_ -> do
521− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed
522− recalculateCoincidenceHeight subscribed
523− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: SubscriberCoincidenceInner" <> showNodeId subscribed <> " done"
526−invalidateSubscriberHeight :: Height -> Subscriber x a -> IO ()
527−invalidateSubscriberHeight = flip subscriberInvalidateHeight
529−recalculateSubscriberHeight :: Height -> Subscriber x a -> IO ()
530−recalculateSubscriberHeight = flip subscriberRecalculateHeight
532−-- | Propagate everything at the current height
533−propagate :: a -> WeakBag (Subscriber x a) -> EventM x ()
534−propagate a subscribers = withIncreasedDepth $ do
535− -- 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
536− --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
537− WeakBag.traverse subscribers $ \s -> subscriberPropagate s a
539−-- | Propagate everything at the current height
540−propagateFast :: a -> FastWeakBag (Subscriber x a) -> EventM x ()
541−propagateFast a subscribers = withIncreasedDepth $ do
542− -- 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
543− --TODO: Should we check if nodes already have their values before propagating? Maybe we're re-doing work
544− FastWeakBag.traverse subscribers $ \s -> subscriberPropagate s a
546−--------------------------------------------------------------------------------
548−--------------------------------------------------------------------------------
553−data EventSubscribed x = EventSubscribed
554− { eventSubscribedHeightRef :: {-# UNPACK #-} !(IORef Height)
555− , eventSubscribedRetained :: {-# NOUNPACK #-} !Any
557− , eventSubscribedGetParents :: !(IO [Some (EventSubscribed x)]) -- For debugging loops
558− , eventSubscribedHasOwnHeightRef :: !Bool
559− , eventSubscribedWhoCreated :: !(IO [String])
563−eventSubscribedRoot :: RootSubscribed x a -> EventSubscribed x
564−eventSubscribedRoot !r = EventSubscribed
565− { eventSubscribedHeightRef = zeroRef
566− , eventSubscribedRetained = toAny r
568− , eventSubscribedGetParents = return []
569− , eventSubscribedHasOwnHeightRef = False
570− , eventSubscribedWhoCreated = return ["root"]
574−eventSubscribedNever :: EventSubscribed x
575−eventSubscribedNever = EventSubscribed
576− { eventSubscribedHeightRef = zeroRef
577− , eventSubscribedRetained = toAny ()
579− , eventSubscribedGetParents = return []
580− , eventSubscribedHasOwnHeightRef = False
581− , eventSubscribedWhoCreated = return ["never"]
585−eventSubscribedFan :: FanSubscribed x k -> EventSubscribed x
586−eventSubscribedFan !subscribed = EventSubscribed
587− { eventSubscribedHeightRef = eventSubscribedHeightRef $ _eventSubscription_subscribed $ fanSubscribedParent subscribed
588− , eventSubscribedRetained = toAny subscribed
590− , eventSubscribedGetParents = return [Some.This $ _eventSubscription_subscribed $ fanSubscribedParent subscribed]
591− , eventSubscribedHasOwnHeightRef = False
592− , eventSubscribedWhoCreated = whoCreatedIORef $ fanSubscribedCachedSubscribed subscribed
596−eventSubscribedSwitch :: SwitchSubscribed x a -> EventSubscribed x
597−eventSubscribedSwitch !subscribed = EventSubscribed
598− { eventSubscribedHeightRef = switchSubscribedHeight subscribed
599− , eventSubscribedRetained = toAny subscribed
601− , eventSubscribedGetParents = do
602− s <- readIORef $ switchSubscribedCurrentParent subscribed
603− return [Some.This $ _eventSubscription_subscribed s]
604− , eventSubscribedHasOwnHeightRef = True
605− , eventSubscribedWhoCreated = whoCreatedIORef $ switchSubscribedCachedSubscribed subscribed
609−eventSubscribedCoincidence :: CoincidenceSubscribed x a -> EventSubscribed x
610−eventSubscribedCoincidence !subscribed = EventSubscribed
611− { eventSubscribedHeightRef = coincidenceSubscribedHeight subscribed
612− , eventSubscribedRetained = toAny subscribed
614− , eventSubscribedGetParents = do
615− innerSubscription <- readIORef $ coincidenceSubscribedInnerParent subscribed
616− let outerParent = Some.This $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
617− innerParents = maybeToList $ fmap Some.This innerSubscription
618− return $ outerParent : innerParents
619− , eventSubscribedHasOwnHeightRef = True
620− , eventSubscribedWhoCreated = whoCreatedIORef $ coincidenceSubscribedCachedSubscribed subscribed
624−getEventSubscribedHeight :: EventSubscribed x -> IO Height
625−getEventSubscribedHeight es = readIORef $ eventSubscribedHeightRef es
628−whoCreatedEventSubscribed :: EventSubscribed x -> IO [String]
629−whoCreatedEventSubscribed = eventSubscribedWhoCreated
631−walkInvalidHeightParents :: EventSubscribed x -> IO [Some (EventSubscribed x)]
632−walkInvalidHeightParents s0 = do
633− subscribers <- flip execStateT mempty $ ($ Some.This s0) $ fix $ \loop (Some.This s) -> do
634− h <- liftIO $ readIORef $ eventSubscribedHeightRef s
635− when (h == invalidHeight) $ do
636− when (eventSubscribedHasOwnHeightRef s) $ liftIO $ writeIORef (eventSubscribedHeightRef s) $! invalidHeightBeingTraversed
637− modify (Some.This s :)
638− mapM_ loop =<< liftIO (eventSubscribedGetParents s)
639− forM_ subscribers $ \(Some.This s) -> writeIORef (eventSubscribedHeightRef s) $! invalidHeight
643−{-# INLINE subscribeHoldEvent #-}
644−subscribeHoldEvent :: Hold x p -> Subscriber x p -> EventM x (EventSubscription x, Maybe p)
645−subscribeHoldEvent = subscribeAndRead . holdEvent
647−--------------------------------------------------------------------------------
649−--------------------------------------------------------------------------------
651−newtype Behavior x a = Behavior { readBehaviorTracked :: BehaviorM x a }
653−behaviorHold :: Hold x p -> Behavior x (PatchTarget p)
654−behaviorHold !h = Behavior $ readHoldTracked h
656−behaviorHoldIdentity :: Hold x (Identity a) -> Behavior x a
657−behaviorHoldIdentity = behaviorHold
659−behaviorConst :: a -> Behavior x a
660−behaviorConst !a = Behavior $ return a
662−behaviorPull :: Pull x a -> Behavior x a
663−behaviorPull !p = Behavior $ do
664− val <- liftIO $ readIORef $ pullValue p
666− Just subscribed -> do
667− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some.This (BehaviorSubscribedPull subscribed)) :))
668− askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (pullSubscribedInvalidators subscribed) (wi:))
669− liftIO $ touch $ pullSubscribedOwnInvalidator subscribed
670− return $ pullSubscribedValue subscribed
672− i <- liftIO $ newInvalidatorPull p
673− wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorPull"
674− parentsRef <- liftIO $ newIORef []
675− holdInits <- askBehaviorHoldInits
676− a <- liftIO $ runReaderT (unBehaviorM $ pullCompute p) (Just (wi, parentsRef), holdInits)
677− invsRef <- liftIO . newIORef . maybeToList =<< askInvalidator
678− parents <- liftIO $ readIORef parentsRef
679− let subscribed = PullSubscribed
680− { pullSubscribedValue = a
681− , pullSubscribedInvalidators = invsRef
682− , pullSubscribedOwnInvalidator = i
683− , pullSubscribedParents = parents
685− liftIO $ writeIORef (pullValue p) $ Just subscribed
686− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some.This (BehaviorSubscribedPull subscribed)) :))
689−behaviorDyn :: Patch p => Dyn x p -> Behavior x (PatchTarget p)
690−behaviorDyn !d = Behavior $ readHoldTracked =<< getDynHold d
692−{-# INLINE readHoldTracked #-}
693−readHoldTracked :: Hold x p -> BehaviorM x (PatchTarget p)
694−readHoldTracked h = do
695− result <- liftIO $ readIORef $ holdValue h
696− askInvalidator >>= mapM_ (\wi -> liftIO $ modifyIORef' (holdInvalidators h) (wi:))
697− askParentsRef >>= mapM_ (\r -> liftIO $ modifyIORef' r (SomeBehaviorSubscribed (Some.This (BehaviorSubscribedHold h)) :))
698− liftIO $ touch h -- Otherwise, if this gets inlined enough, the hold's parent reference may get collected
701−{-# INLINABLE readBehaviorUntracked #-}
702−readBehaviorUntracked :: Defer (SomeHoldInit x) m => Behavior x a -> m a
703−readBehaviorUntracked b = do
704− holdInits <- getDeferralQueue
705− liftIO $ runBehaviorM (readBehaviorTracked b) Nothing holdInits --TODO: Specialize readBehaviorTracked to the Nothing and Just cases
707−--------------------------------------------------------------------------------
709−--------------------------------------------------------------------------------
711−data Dynamic x p = Dynamic
712− { dynamicCurrent :: !(Behavior x (PatchTarget p))
713− , dynamicUpdated :: Event x p -- This must be lazy; see the comment on holdEvent --TODO: Would this let us eliminate `Dyn`?
716−dynamicHold :: Hold x p -> Dynamic x p
717−dynamicHold !h = Dynamic
718− { dynamicCurrent = behaviorHold h
719− , dynamicUpdated = eventHold h
722−dynamicHoldIdentity :: Hold x (Identity a) -> Dynamic x (Identity a)
723−dynamicHoldIdentity = dynamicHold
725−dynamicConst :: PatchTarget p -> Dynamic x p
726−dynamicConst !a = Dynamic
727− { dynamicCurrent = behaviorConst a
728− , dynamicUpdated = eventNever
731−dynamicDyn :: (HasSpiderTimeline x, Patch p) => Dyn x p -> Dynamic x p
732−dynamicDyn !d = Dynamic
733− { dynamicCurrent = behaviorDyn d
734− , dynamicUpdated = eventDyn d
737−dynamicDynIdentity :: HasSpiderTimeline x => Dyn x (Identity a) -> Dynamic x (Identity a)
738−dynamicDynIdentity = dynamicDyn
740−--------------------------------------------------------------------------------
742−--------------------------------------------------------------------------------
744−--TODO: Figure out why certain things are not 'representational', then make them
745−--representational so we can use coerce
747−--type role Hold representational
749− = Hold { holdValue :: !(IORef (PatchTarget p))
750− , holdInvalidators :: !(IORef [Weak (Invalidator x)])
751− , holdEvent :: Event x p -- This must be lazy, or holds cannot be defined before their input Events
752− , holdParent :: !(IORef (Maybe (EventSubscription x))) -- Keeps its parent alive (will be undefined until the hold is initialized) --TODO: Probably shouldn't be an IORef
758−-- | A statically allocated 'SpiderTimeline'
761−{-# NOINLINE globalSpiderTimelineEnv #-}
762−globalSpiderTimelineEnv :: SpiderTimelineEnv Global
763−globalSpiderTimelineEnv = unsafePerformIO unsafeNewSpiderTimelineEnv
765−-- | Stores all global data relevant to a particular Spider timeline; only one
766−-- value should exist for each type @x@
767−data SpiderTimelineEnv x = SpiderTimelineEnv
768− { _spiderTimeline_lock :: {-# UNPACK #-} !(MVar ())
769− , _spiderTimeline_eventEnv :: {-# UNPACK #-} !(EventEnv x)
771− , _spiderTimeline_depth :: {-# UNPACK #-} !(IORef Int)
774−type role SpiderTimelineEnv nominal
776−instance Eq (SpiderTimelineEnv x) where
777− _ == _ = True -- Since only one exists of each type
779−instance GEq SpiderTimelineEnv where
780− a `geq` b = if _spiderTimeline_lock a == _spiderTimeline_lock b
781− then Just $ unsafeCoerce Refl -- This unsafeCoerce is safe because the same SpiderTimelineEnv can't have two different 'x' arguments
785− = EventEnv { eventEnvAssignments :: !(IORef [SomeAssignment x]) -- Needed for Subscribe
786− , eventEnvHoldInits :: !(IORef [SomeHoldInit x]) -- Needed for Subscribe
787− , eventEnvDynInits :: !(IORef [SomeDynInit x])
788− , eventEnvMergeUpdates :: !(IORef [SomeMergeUpdate x])
789− , eventEnvMergeInits :: !(IORef [SomeMergeInit x]) -- Needed for Subscribe
790− , eventEnvClears :: !(IORef [Some Clear]) -- Needed for Subscribe
791− , eventEnvIntClears :: !(IORef [Some IntClear])
792− , eventEnvRootClears :: !(IORef [Some RootClear])
793− , eventEnvCurrentHeight :: !(IORef Height) -- Needed for Subscribe
794− , eventEnvResetCoincidences :: !(IORef [SomeResetCoincidence x]) -- Needed for Subscribe
795− , eventEnvDelayedMerges :: !(IORef (IntMap [EventM x ()]))
798−{-# INLINE runEventM #-}
799−runEventM :: EventM x a -> IO a
802−asksEventEnv :: forall x a. HasSpiderTimeline x => (EventEnv x -> a) -> EventM x a
803−asksEventEnv f = return $ f $ _spiderTimeline_eventEnv (spiderTimeline :: SpiderTimelineEnv x)
805−class MonadIO m => Defer a m where
806− getDeferralQueue :: m (IORef [a])
809−defer :: Defer a m => a -> m ()
811− q <- getDeferralQueue
812− liftIO $ modifyIORef' q (a:)
814−instance HasSpiderTimeline x => Defer (SomeAssignment x) (EventM x) where
815− {-# INLINE getDeferralQueue #-}
816− getDeferralQueue = asksEventEnv eventEnvAssignments
818−instance HasSpiderTimeline x => Defer (SomeHoldInit x) (EventM x) where
819− {-# INLINE getDeferralQueue #-}
820− getDeferralQueue = asksEventEnv eventEnvHoldInits
822−instance HasSpiderTimeline x => Defer (SomeDynInit x) (EventM x) where
823− {-# INLINE getDeferralQueue #-}
824− getDeferralQueue = asksEventEnv eventEnvDynInits
826−instance Defer (SomeHoldInit x) (BehaviorM x) where
827− {-# INLINE getDeferralQueue #-}
828− getDeferralQueue = BehaviorM $ asks snd
830−instance HasSpiderTimeline x => Defer (SomeMergeUpdate x) (EventM x) where
831− {-# INLINE getDeferralQueue #-}
832− getDeferralQueue = asksEventEnv eventEnvMergeUpdates
834−instance HasSpiderTimeline x => Defer (SomeMergeInit x) (EventM x) where
835− {-# INLINE getDeferralQueue #-}
836− getDeferralQueue = asksEventEnv eventEnvMergeInits
838−class HasSpiderTimeline x => HasCurrentHeight x m | m -> x where
839− getCurrentHeight :: m Height
840− scheduleMerge :: Height -> EventM x () -> m ()
842−instance HasSpiderTimeline x => HasCurrentHeight x (EventM x) where
843− {-# INLINE getCurrentHeight #-}
844− getCurrentHeight = do
845− heightRef <- asksEventEnv eventEnvCurrentHeight
846− liftIO $ readIORef heightRef
847− {-# INLINE scheduleMerge #-}
848− scheduleMerge height subscribed = do
849− delayedRef <- asksEventEnv eventEnvDelayedMerges
850− liftIO $ modifyIORef' delayedRef $ IntMap.insertWith (++) (unHeight height) [subscribed]
852−class HasSpiderTimeline x where
853− -- | Retrieve the current SpiderTimelineEnv
854− spiderTimeline :: SpiderTimelineEnv x
856−instance HasSpiderTimeline Global where
857− spiderTimeline = globalSpiderTimelineEnv
859−putCurrentHeight :: HasSpiderTimeline x => Height -> EventM x ()
860−putCurrentHeight h = do
861− heightRef <- asksEventEnv eventEnvCurrentHeight
862− liftIO $ writeIORef heightRef $! h
864−instance HasSpiderTimeline x => Defer (Some Clear) (EventM x) where
865− {-# INLINE getDeferralQueue #-}
866− getDeferralQueue = asksEventEnv eventEnvClears
868−{-# INLINE scheduleClear #-}
869−scheduleClear :: Defer (Some Clear) m => IORef (Maybe a) -> m ()
870−scheduleClear r = defer $ Some.This $ Clear r
872−instance HasSpiderTimeline x => Defer (Some IntClear) (EventM x) where
873− {-# INLINE getDeferralQueue #-}
874− getDeferralQueue = asksEventEnv eventEnvIntClears
876−{-# INLINE scheduleIntClear #-}
877−scheduleIntClear :: Defer (Some IntClear) m => IORef (IntMap a) -> m ()
878−scheduleIntClear r = defer $ Some.This $ IntClear r
880−instance HasSpiderTimeline x => Defer (Some RootClear) (EventM x) where
881− {-# INLINE getDeferralQueue #-}
882− getDeferralQueue = asksEventEnv eventEnvRootClears
884−{-# INLINE scheduleRootClear #-}
885−scheduleRootClear :: Defer (Some RootClear) m => IORef (DMap k Identity) -> m ()
886−scheduleRootClear r = defer $ Some.This $ RootClear r
888−instance HasSpiderTimeline x => Defer (SomeResetCoincidence x) (EventM x) where
889− {-# INLINE getDeferralQueue #-}
890− getDeferralQueue = asksEventEnv eventEnvResetCoincidences
892−-- Note: hold cannot examine its event until after the phase is over
893−{-# INLINE [1] hold #-}
894−hold :: (Patch p, Defer (SomeHoldInit x) m) => PatchTarget p -> Event x p -> m (Hold x p)
896− valRef <- liftIO $ newIORef v0
897− invsRef <- liftIO $ newIORef []
898− parentRef <- liftIO $ newIORef Nothing
900− nodeId <- liftIO newNodeId
903− { holdValue = valRef
904− , holdInvalidators = invsRef
906− , holdParent = parentRef
908− , holdNodeId = nodeId
911− defer $ SomeHoldInit h
914−{-# INLINE getHoldEventSubscription #-}
915−getHoldEventSubscription :: forall p x. (HasSpiderTimeline x, Patch p) => Hold x p -> EventM x (EventSubscription x)
916−getHoldEventSubscription h = do
917− ep <- liftIO $ readIORef $ holdParent h
919− Just subd -> return subd
922− subscriptionRef <- liftIO $ newIORef $ error "getHoldEventSubscription: subdRef uninitialized"
923− (subscription@(EventSubscription _ _), occ) <- subscribeAndRead e =<< liftIO (newSubscriberHold h)
924− liftIO $ writeIORef subscriptionRef $! subscription
926− Nothing -> return ()
928− old <- liftIO $ readIORef $ holdValue h
930− Nothing -> return ()
932− -- Need to evaluate these so that we don't retain the Hold itself
933− v <- liftIO $ evaluate $ holdValue h
934− i <- liftIO $ evaluate $ holdInvalidators h
935− defer $ SomeAssignment v i new
936− liftIO $ writeIORef (holdParent h) $ Just subscription
939−type BehaviorEnv x = (Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]), IORef [SomeHoldInit x])
941−--type role BehaviorM representational
942−-- BehaviorM can sample behaviors
943−newtype BehaviorM x a = BehaviorM { unBehaviorM :: ReaderT (BehaviorEnv x) IO a } deriving (Functor, Applicative, MonadIO, MonadFix)
945−instance Monad (BehaviorM x) where
946− {-# INLINE (>>=) #-}
947− BehaviorM x >>= f = BehaviorM $ x >>= unBehaviorM . f
949− BehaviorM x >> BehaviorM y = BehaviorM $ x >> y
950− {-# INLINE return #-}
951− return x = BehaviorM $ return x
953− fail s = BehaviorM $ fail s
955−data BehaviorSubscribed x a
956− = forall p. BehaviorSubscribedHold (Hold x p)
957− | BehaviorSubscribedPull (PullSubscribed x a)
959−newtype SomeBehaviorSubscribed x = SomeBehaviorSubscribed (Some (BehaviorSubscribed x))
961−--type role PullSubscribed representational
962−data PullSubscribed x a
963− = PullSubscribed { pullSubscribedValue :: !a
964− , pullSubscribedInvalidators :: !(IORef [Weak (Invalidator x)])
965− , pullSubscribedOwnInvalidator :: !(Invalidator x)
966− , pullSubscribedParents :: ![SomeBehaviorSubscribed x] -- Need to keep parent behaviors alive, or they won't let us know when they're invalidated
969−--type role Pull representational
971− = Pull { pullValue :: !(IORef (Maybe (PullSubscribed x a)))
972− , pullCompute :: !(BehaviorM x a)
979− = forall a. InvalidatorPull (Pull x a)
980− | forall a. InvalidatorSwitch (SwitchSubscribed x a)
982−data RootSubscribed x a = forall k. GCompare k => RootSubscribed
983− { rootSubscribedKey :: !(k a)
984− , rootSubscribedCachedSubscribed :: !(IORef (DMap k (RootSubscribed x))) -- From the original Root
985− , rootSubscribedSubscribers :: !(WeakBag (Subscriber x a))
986− , rootSubscribedOccurrence :: !(IO (Maybe a)) -- Lookup from rootOccurrence
987− , rootSubscribedUninit :: IO ()
988− , rootSubscribedWeakSelf :: !(IORef (Weak (RootSubscribed x a))) --TODO: Can we make this a lazy non-IORef and then force it manually to avoid an indirection each time we use it?
990− , rootSubscribedNodeId :: Int
994−data Root x (k :: * -> *)
995− = Root { rootOccurrence :: !(IORef (DMap k Identity)) -- The currently-firing occurrence of this event
996− , rootSubscribed :: !(IORef (DMap k (RootSubscribed x)))
997− , rootInit :: !(forall a. k a -> RootTrigger x a -> IO (IO ()))
1000−data SomeHoldInit x = forall p. Patch p => SomeHoldInit !(Hold x p)
1002−data SomeDynInit x = forall p. Patch p => SomeDynInit !(Dyn x p)
1004−data SomeMergeUpdate x = SomeMergeUpdate
1005− { _someMergeUpdate_update :: !(EventM x [EventSubscription x])
1006− , _someMergeUpdate_invalidateHeight :: !(IO ())
1007− , _someMergeUpdate_recalculateHeight :: !(IO ())
1010−newtype SomeMergeInit x = SomeMergeInit { unSomeMergeInit :: EventM x () }
1012−-- EventM can do everything BehaviorM can, plus create holds
1013−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
1015−newtype MergeSubscribedParent x a = MergeSubscribedParent { unMergeSubscribedParent :: EventSubscription x }
1017−data MergeSubscribedParentWithMove x k a = MergeSubscribedParentWithMove
1018− { _mergeSubscribedParentWithMove_subscription :: !(EventSubscription x)
1019− , _mergeSubscribedParentWithMove_key :: !(IORef (k a))
1022−data HeightBag = HeightBag
1023− { _heightBag_size :: {-# UNPACK #-} !Int
1024− , _heightBag_contents :: !(IntMap Word) -- Number of excess in each bucket
1026− deriving (Show, Read, Eq, Ord)
1028−heightBagEmpty :: HeightBag
1029−heightBagEmpty = heightBagVerify $ HeightBag 0 IntMap.empty
1031−heightBagSize :: HeightBag -> Int
1032−heightBagSize = _heightBag_size
1034−heightBagFromList :: [Height] -> HeightBag
1035−heightBagFromList heights = heightBagVerify $ foldl' (flip heightBagAdd) heightBagEmpty heights
1037−heightBagAdd :: Height -> HeightBag -> HeightBag
1038−heightBagAdd (Height h) (HeightBag s c) = heightBagVerify $ HeightBag (succ s) $ IntMap.insertWithKey (\_ _ old -> succ old) h 0 c
1040−heightBagRemove :: Height -> HeightBag -> HeightBag
1041−heightBagRemove (Height h) b@(HeightBag s c) = heightBagVerify $ case IntMap.lookup h c of
1042− Nothing -> error $ "heightBagRemove: Height " <> show h <> " not present in bag " <> show b
1043− Just old -> HeightBag (pred s) $ case old of
1044− 0 -> IntMap.delete h c
1045− _ -> IntMap.insert h (pred old) c
1047−heightBagMax :: HeightBag -> Height
1048−heightBagMax (HeightBag _ c) = case IntMap.maxViewWithKey c of
1049− Just ((h, _), _) -> Height h
1050− Nothing -> zeroHeight
1052−heightBagVerify :: HeightBag -> HeightBag
1054−heightBagVerify b@(HeightBag s c) = if
1055− | s /= IntMap.size c + fromIntegral (sum (IntMap.elems c))
1056− -> error $ "heightBagVerify: size doesn't match: " <> show b
1057− | unHeight invalidHeight `IntMap.member` c
1058− -> error $ "heightBagVerify: contains invalid height: " <> show b
1061−heightBagVerify = id
1064−data FanSubscribedChildren (x :: *) k a = FanSubscribedChildren
1065− { _fanSubscribedChildren_list :: !(WeakBag (Subscriber x a))
1066− , _fanSubscribedChildren_self :: {-# NOUNPACK #-} !(k a, FanSubscribed x k)
1067− , _fanSubscribedChildren_weakSelf :: !(IORef (Weak (k a, FanSubscribed x k)))
1070−data FanSubscribed (x :: *) k
1071− = FanSubscribed { fanSubscribedCachedSubscribed :: !(IORef (Maybe (FanSubscribed x k)))
1072− , fanSubscribedOccurrence :: !(IORef (Maybe (DMap k Identity)))
1073− , fanSubscribedSubscribers :: !(IORef (DMap k (FanSubscribedChildren x k))) -- This DMap should never be empty
1074− , fanSubscribedParent :: !(EventSubscription x)
1075−#ifdef DEBUG_NODEIDS
1076− , fanSubscribedNodeId :: Int
1081− = Fan { fanParent :: !(Event x (DMap k Identity))
1082− , fanSubscribed :: !(IORef (Maybe (FanSubscribed x k)))
1085−data SwitchSubscribed x a
1086− = SwitchSubscribed { switchSubscribedCachedSubscribed :: !(IORef (Maybe (SwitchSubscribed x a)))
1087− , switchSubscribedOccurrence :: !(IORef (Maybe a))
1088− , switchSubscribedHeight :: !(IORef Height)
1089− , switchSubscribedSubscribers :: !(WeakBag (Subscriber x a))
1090− , switchSubscribedOwnInvalidator :: {-# NOUNPACK #-} !(Invalidator x)
1091− , switchSubscribedOwnWeakInvalidator :: !(IORef (Weak (Invalidator x)))
1092− , switchSubscribedBehaviorParents :: !(IORef [SomeBehaviorSubscribed x])
1093− , switchSubscribedParent :: !(Behavior x (Event x a))
1094− , switchSubscribedCurrentParent :: !(IORef (EventSubscription x))
1095− , switchSubscribedWeakSelf :: !(IORef (Weak (SwitchSubscribed x a)))
1096−#ifdef DEBUG_NODEIDS
1097− , switchSubscribedNodeId :: Int
1102− = Switch { switchParent :: !(Behavior x (Event x a))
1103− , switchSubscribed :: !(IORef (Maybe (SwitchSubscribed x a)))
1106−#ifdef USE_TEMPLATE_HASKELL
1107−{-# ANN CoincidenceSubscribed "HLint: ignore Redundant bracket" #-}
1109−data CoincidenceSubscribed x a
1110− = CoincidenceSubscribed { coincidenceSubscribedCachedSubscribed :: !(IORef (Maybe (CoincidenceSubscribed x a)))
1111− , coincidenceSubscribedOccurrence :: !(IORef (Maybe a))
1112− , coincidenceSubscribedSubscribers :: !(WeakBag (Subscriber x a))
1113− , coincidenceSubscribedHeight :: !(IORef Height)
1114− , coincidenceSubscribedOuter :: {-# NOUNPACK #-} (Subscriber x (Event x a))
1115− , coincidenceSubscribedOuterParent :: !(EventSubscription x)
1116− , coincidenceSubscribedInnerParent :: !(IORef (Maybe (EventSubscribed x)))
1117− , coincidenceSubscribedWeakSelf :: !(IORef (Weak (CoincidenceSubscribed x a)))
1118−#ifdef DEBUG_NODEIDS
1119− , coincidenceSubscribedNodeId :: Int
1123−data Coincidence x a
1124− = Coincidence { coincidenceParent :: !(Event x (Event x a))
1125− , coincidenceSubscribed :: !(IORef (Maybe (CoincidenceSubscribed x a)))
1128−{-# NOINLINE newInvalidatorSwitch #-}
1129−newInvalidatorSwitch :: SwitchSubscribed x a -> IO (Invalidator x)
1130−newInvalidatorSwitch subd = return $! InvalidatorSwitch subd
1132−{-# NOINLINE newInvalidatorPull #-}
1133−newInvalidatorPull :: Pull x a -> IO (Invalidator x)
1134−newInvalidatorPull p = return $! InvalidatorPull p
1136−instance HasSpiderTimeline x => Filterable (Event x) where
1137− mapMaybe f = push $ return . f
1139−instance HasSpiderTimeline x => Align (Event x) where
1141−#if MIN_VERSION_these(0, 8, 0)
1142−instance HasSpiderTimeline x => Semialign (Event x) where
1144− align ea eb = mapMaybe dmapToThese $ mergeG coerce $ dynamicConst $
1145− DMap.fromDistinctAscList [LeftTag :=> ea, RightTag :=> eb]
1147−data DynType x p = UnsafeDyn !(BehaviorM x (PatchTarget p), Event x p)
1148− | BuildDyn !(EventM x (PatchTarget p), Event x p)
1149− | HoldDyn !(Hold x p)
1151−newtype Dyn (x :: Type) p = Dyn { unDyn :: IORef (DynType x p) }
1153−newMapDyn :: HasSpiderTimeline x => (a -> b) -> Dynamic x (Identity a) -> Dynamic x (Identity b)
1154−newMapDyn f d = dynamicDynIdentity $ unsafeBuildDynamic (fmap f $ readBehaviorTracked $ dynamicCurrent d) (Identity . f . runIdentity <$> dynamicUpdated d)
1156−--TODO: Avoid the duplication between this and R.zipDynWith
1157−zipDynWith :: HasSpiderTimeline x => (a -> b -> c) -> Dynamic x (Identity a) -> Dynamic x (Identity b) -> Dynamic x (Identity c)
1158−zipDynWith f da db =
1159− let eab = align (dynamicUpdated da) (dynamicUpdated db)
1160− ec = flip push eab $ \o -> do
1161− (a, b) <- case o of
1162− This (Identity a) -> do
1163− b <- readBehaviorUntracked $ dynamicCurrent db
1165− That (Identity b) -> do
1166− a <- readBehaviorUntracked $ dynamicCurrent da
1168− These (Identity a) (Identity b) -> return (a, b)
1169− return $ Just $ Identity $ f a b
1170− in dynamicDynIdentity $ unsafeBuildDynamic (f <$> readBehaviorUntracked (dynamicCurrent da) <*> readBehaviorUntracked (dynamicCurrent db)) ec
1172−buildDynamic :: (Defer (SomeDynInit x) m, Patch p) => EventM x (PatchTarget p) -> Event x p -> m (Dyn x p)
1173−buildDynamic readV0 v' = do
1174− result <- liftIO $ newIORef $ BuildDyn (readV0, v')
1175− let !d = Dyn result
1176− defer $ SomeDynInit d
1179−unsafeBuildDynamic :: BehaviorM x (PatchTarget p) -> Event x p -> Dyn x p
1180−unsafeBuildDynamic readV0 v' = Dyn $ unsafeNewIORef x $ UnsafeDyn x
1181− where x = (readV0, v')
1183−-- ResultM can read behaviors and events
1184−type ResultM = EventM
1186−{-# NOINLINE unsafeNewIORef #-}
1187−unsafeNewIORef :: a -> b -> IORef b
1188−unsafeNewIORef a b = unsafePerformIO $ do
1192−instance HasSpiderTimeline x => Functor (Event x) where
1193− fmap f = push $ return . Just . f
1195−instance Functor (Behavior x) where
1196− fmap f = pull . fmap f . readBehaviorTracked
1199−push :: HasSpiderTimeline x => (a -> ComputeM x (Maybe b)) -> Event x a -> Event x b
1200−push f e = cacheEvent (pushCheap f e)
1202−{-# INLINABLE pull #-}
1203−pull :: BehaviorM x a -> Behavior x a
1204−pull a = behaviorPull $ Pull
1206− , pullValue = unsafeNewIORef a Nothing
1207−#ifdef DEBUG_NODEIDS
1208− , pullNodeId = unsafeNodeId a
1212−{-# INLINABLE switch #-}
1213−switch :: HasSpiderTimeline x => Behavior x (Event x a) -> Event x a
1214−switch a = eventSwitch $ Switch
1216− , switchSubscribed = unsafeNewIORef a Nothing
1219−coincidence :: HasSpiderTimeline x => Event x (Event x a) -> Event x a
1220−coincidence a = eventCoincidence $ Coincidence
1221− { coincidenceParent = a
1222− , coincidenceSubscribed = unsafeNewIORef a Nothing
1225−-- Propagate the given event occurrence; before cleaning up, run the given action, which may read the state of events and behaviors
1226−run :: forall x b. HasSpiderTimeline x => [DSum (RootTrigger x) Identity] -> ResultM x b -> SpiderHost x b
1227−run roots after = do
1228− tracePropagate (Proxy :: Proxy x) $ "Running an event frame with " <> show (length roots) <> " events"
1229− let t = spiderTimeline :: SpiderTimelineEnv x
1230− result <- SpiderHost $ withMVar (_spiderTimeline_lock t) $ \_ -> unSpiderHost $ runFrame $ do
1231− rootsToPropagate <- forM roots $ \r@(RootTrigger (_, occRef, k) :=> a) -> do
1232− occBefore <- liftIO $ do
1233− occBefore <- readIORef occRef
1234− writeIORef occRef $! DMap.insert k a occBefore
1236− if DMap.null occBefore
1237− then do scheduleRootClear occRef
1239− else return Nothing
1240− forM_ (catMaybes rootsToPropagate) $ \(RootTrigger (subscribersRef, _, _) :=> Identity a) -> do
1241− propagate a subscribersRef
1242− delayedRef <- asksEventEnv eventEnvDelayedMerges
1244− delayed <- liftIO $ readIORef delayedRef
1245− case IntMap.minViewWithKey delayed of
1246− Nothing -> return ()
1247− Just ((currentHeight, cur), future) -> do
1248− tracePropagate (Proxy :: Proxy x) $ "Running height " ++ show currentHeight
1249− putCurrentHeight $ Height currentHeight
1250− liftIO $ writeIORef delayedRef $! future
1254− putCurrentHeight maxBound
1256− tracePropagate (Proxy :: Proxy x) "Done running an event frame"
1259−scheduleMerge' :: HasSpiderTimeline x => Height -> IORef Height -> EventM x () -> EventM x ()
1260−scheduleMerge' initialHeight heightRef a = scheduleMerge initialHeight $ do
1261− height <- liftIO $ readIORef heightRef
1262− currentHeight <- getCurrentHeight
1263− case height `compare` currentHeight of
1264− LT -> error "Somehow a merge's height has been decreased after it was scheduled"
1265− GT -> scheduleMerge' height heightRef a -- The height has been increased (by a coincidence event; TODO: is this the only way?)
1268−newtype Clear a = Clear (IORef (Maybe a))
1270−newtype IntClear a = IntClear (IORef (IntMap a))
1272−newtype RootClear k = RootClear (IORef (DMap k Identity))
1274−data SomeAssignment x = forall a. SomeAssignment {-# UNPACK #-} !(IORef a) {-# UNPACK #-} !(IORef [Weak (Invalidator x)]) a
1276−debugFinalize :: Bool
1277−debugFinalize = False
1279−mkWeakPtrWithDebug :: a -> String -> IO (Weak a)
1280−mkWeakPtrWithDebug x debugNote = do
1284− then Just $ putStrLn $ "finalizing: " ++ debugNote
1287−type WeakList a = [Weak a]
1289−{-# INLINE withIncreasedDepth #-}
1291−withIncreasedDepth :: CanTrace x m => m a -> m a
1292−withIncreasedDepth a = do
1293− spiderTimeline <- askSpiderTimelineEnv
1294− liftIO $ modifyIORef' (_spiderTimeline_depth spiderTimeline) succ
1296− liftIO $ modifyIORef' (_spiderTimeline_depth spiderTimeline) pred
1299−withIncreasedDepth :: m a -> m a
1300−withIncreasedDepth = id
1303−type CanTrace x m = (HasSpiderTimeline x, MonadIO m)
1305−{-# INLINE tracePropagate #-}
1306−tracePropagate :: (CanTrace x m) => proxy x -> String -> m ()
1307−tracePropagate p = traceWhen p debugPropagate
1309−{-# INLINE traceInvalidate #-}
1310−traceInvalidate :: String -> IO ()
1311−traceInvalidate = when debugInvalidate . liftIO . putStrLn
1313−{-# INLINE traceWhen #-}
1314−traceWhen :: (CanTrace x m) => proxy x -> Bool -> String -> m ()
1315−traceWhen p b message = traceMWhen p b $ return message
1317−{-# INLINE traceMWhen #-}
1318−traceMWhen :: (CanTrace x m) => proxy x -> Bool -> m String -> m ()
1319−traceMWhen _ b getMessage = when b $ do
1320− message <- getMessage
1322− spiderTimeline <- askSpiderTimelineEnv
1323− d <- liftIO $ readIORef $ _spiderTimeline_depth spiderTimeline
1327− liftIO $ putStrLn $ replicate d ' ' <> message
1329−whoCreatedIORef :: IORef a -> IO [String]
1330−whoCreatedIORef (IORef a) = whoCreated $! a
1333−groupByHead :: Eq a => [NonEmpty a] -> [(a, NonEmpty [a])]
1336− (x :| xs) : t -> case groupByHead t of
1337− [] -> [(x, xs :| [])]
1339− | x == y -> (x, xs `NonEmpty.cons` yss) : t'
1340− | otherwise -> (x, xs :| []) : l
1342−listsToForest :: Eq a => [[a]] -> Forest a
1343−listsToForest l = fmap (\(a, l') -> Node a $ listsToForest $ toList l') $ groupByHead $ catMaybes $ fmap nonEmpty l
1346−{-# INLINE propagateSubscriberHold #-}
1347−propagateSubscriberHold :: forall x p. (HasSpiderTimeline x, Patch p) => Hold x p -> p -> EventM x ()
1348−propagateSubscriberHold h a = do
1349− {-# SCC "trace" #-} traceMWhen (Proxy :: Proxy x) debugPropagate $ liftIO $ do
1350− invalidators <- liftIO $ readIORef $ holdInvalidators h
1351− return $ "SubscriberHold" <> showNodeId h <> ": " ++ show (length invalidators)
1352− v <- {-# SCC "read" #-} liftIO $ readIORef $ holdValue h
1353− case {-# SCC "apply" #-} apply a v of
1354− Nothing -> return ()
1356− {-# SCC "trace2" #-} withIncreasedDepth $ tracePropagate (Proxy :: Proxy x) $ "propagateSubscriberHold: assigning Hold" <> showNodeId h
1357− vRef <- {-# SCC "vRef" #-} liftIO $ evaluate $ holdValue h
1358− iRef <- {-# SCC "iRef" #-} liftIO $ evaluate $ holdInvalidators h
1359− defer $ {-# SCC "assignment" #-} SomeAssignment vRef iRef v'
1361−data SomeResetCoincidence x = forall a. SomeResetCoincidence !(EventSubscription x) !(Maybe (CoincidenceSubscribed x a)) -- The CoincidenceSubscriber will be present only if heights need to be reset
1363−runBehaviorM :: BehaviorM x a -> Maybe (Weak (Invalidator x), IORef [SomeBehaviorSubscribed x]) -> IORef [SomeHoldInit x] -> IO a
1364−runBehaviorM a mwi holdInits = runReaderT (unBehaviorM a) (mwi, holdInits)
1366−askInvalidator :: BehaviorM x (Maybe (Weak (Invalidator x)))
1368− (!m, _) <- BehaviorM ask
1370− Nothing -> return Nothing
1371− Just (!wi, _) -> return $ Just wi
1373−askParentsRef :: BehaviorM x (Maybe (IORef [SomeBehaviorSubscribed x]))
1375− (!m, _) <- BehaviorM ask
1377− Nothing -> return Nothing
1378− Just (_, !p) -> return $ Just p
1380−askBehaviorHoldInits :: BehaviorM x (IORef [SomeHoldInit x])
1381−askBehaviorHoldInits = do
1382− (_, !his) <- BehaviorM ask
1385−{-# INLINE getDynHold #-}
1386−getDynHold :: (Defer (SomeHoldInit x) m, Patch p) => Dyn x p -> m (Hold x p)
1388− mh <- liftIO $ readIORef $ unDyn d
1390− HoldDyn h -> return h
1391− UnsafeDyn (readV0, v') -> do
1392− holdInits <- getDeferralQueue
1393− v0 <- liftIO $ runBehaviorM readV0 Nothing holdInits
1395− BuildDyn (readV0, v') -> do
1396− v0 <- liftIO $ runEventM readV0
1401− liftIO $ writeIORef (unDyn d) $ HoldDyn h
1405−-- Always refers to 0
1406−{-# NOINLINE zeroRef #-}
1407−zeroRef :: IORef Height
1408−zeroRef = unsafePerformIO $ newIORef zeroHeight
1410−getRootSubscribed :: GCompare k => k a -> Root x k -> Subscriber x a -> IO (WeakBagTicket, RootSubscribed x a, Maybe a)
1411−getRootSubscribed k r sub = do
1412− mSubscribed <- readIORef $ rootSubscribed r
1413− let getOcc = fmap (coerce . DMap.lookup k) $ readIORef $ rootOccurrence r
1414− case DMap.lookup k mSubscribed of
1415− Just subscribed -> {-# SCC "hitRoot" #-} do
1416− sln <- subscribeRootSubscribed subscribed sub
1418− return (sln, subscribed, occ)
1419− Nothing -> {-# SCC "missRoot" #-} do
1420− weakSelf <- newIORef $ error "getRootSubscribed: weakSelfRef not initialized"
1421− let !cached = rootSubscribed r
1422− uninitRef <- newIORef $ error "getRootsubscribed: uninitRef not initialized"
1423− (subs, sln) <- WeakBag.singleton sub weakSelf cleanupRootSubscribed
1424− when debugPropagate $ putStrLn $ "getRootSubscribed: calling rootInit"
1425− uninit <- rootInit r k $ RootTrigger (subs, rootOccurrence r, k)
1426− writeIORef uninitRef $! uninit
1427− let !subscribed = RootSubscribed
1428− { rootSubscribedKey = k
1429− , rootSubscribedCachedSubscribed = cached
1430− , rootSubscribedOccurrence = getOcc
1431− , rootSubscribedSubscribers = subs
1432− , rootSubscribedUninit = uninit
1433− , rootSubscribedWeakSelf = weakSelf
1434−#ifdef DEBUG_NODEIDS
1435− , rootSubscribedNodeId = unsafeNodeId (k, r, subs)
1438− -- If we die at the same moment that all our children die, they will
1439− -- try to clean us up but will fail because their Weak reference to us
1440− -- will also be dead. So, if we are dying, check if there are any
1441− -- children; since children don't bother cleaning themselves up if
1442− -- their parents are already dead, I don't think there's a race
1443− -- condition here. However, if there are any children, then we can
1444− -- infer that we need to clean ourselves up, so we do.
1446− cs <- readIORef $ _weakBag_children subs
1447− when (not $ IntMap.null cs) (cleanupRootSubscribed subscribed)
1448− writeIORef weakSelf =<< evaluate =<< mkWeakPtr subscribed (Just finalCleanup)
1449− 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
1451− return (sln, subscribed, occ)
1453−#ifdef USE_TEMPLATE_HASKELL
1454−{-# ANN cleanupRootSubscribed "HLint: ignore Redundant bracket" #-}
1456−cleanupRootSubscribed :: RootSubscribed x a -> IO ()
1457−cleanupRootSubscribed self@RootSubscribed { rootSubscribedKey = k, rootSubscribedCachedSubscribed = cached } = do
1458− rootSubscribedUninit self
1459− modifyIORef' cached $ DMap.delete k
1461−{-# INLINE subscribeRootSubscribed #-}
1462−subscribeRootSubscribed :: RootSubscribed x a -> Subscriber x a -> IO WeakBagTicket
1463−subscribeRootSubscribed subscribed sub = WeakBag.insert sub (rootSubscribedSubscribers subscribed) (rootSubscribedWeakSelf subscribed) cleanupRootSubscribed
1465−newtype EventSelectorInt x a = EventSelectorInt { selectInt :: Int -> Event x a }
1467−data FanInt x a = FanInt
1468− { _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
1469− , _fanInt_subscriptionRef :: {-# UNPACK #-} !(IORef (EventSubscription x)) -- This should have a valid subscription iff subscribers is non-empty
1470− , _fanInt_occRef :: {-# UNPACK #-} !(IORef (IntMap a))
1473−newFanInt :: IO (FanInt x a)
1475− 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
1476− subscriptionRef <- newIORef $ error "fanInt: no subscription"
1477− occRef <- newIORef $ error "fanInt: no occurrence"
1479− { _fanInt_subscribers = subscribers
1480− , _fanInt_subscriptionRef = subscriptionRef
1481− , _fanInt_occRef = occRef
1484−{-# NOINLINE unsafeNewFanInt #-}
1485−unsafeNewFanInt :: b -> FanInt x a
1486−unsafeNewFanInt b = unsafePerformIO $ do
1490−fanInt :: HasSpiderTimeline x => Event x (IntMap a) -> EventSelectorInt x a
1492− let self = unsafeNewFanInt p
1493− in EventSelectorInt $ \k -> Event $ \sub -> do
1494− isEmpty <- liftIO $ FastMutableIntMap.isEmpty (_fanInt_subscribers self)
1495− when isEmpty $ do -- This is the first subscriber, so we need to subscribe to our input
1496− (subscription, parentOcc) <- subscribeAndRead p $ Subscriber
1497− { subscriberPropagate = \m -> do
1498− liftIO $ writeIORef (_fanInt_occRef self) m
1499− scheduleIntClear $ _fanInt_occRef self
1500− FastMutableIntMap.forIntersectionWithImmutable_ (_fanInt_subscribers self) m $ \b v -> do --TODO: Do we need to know that no subscribers are being added as we traverse?
1501− FastWeakBag.traverse b $ \s -> do
1502− subscriberPropagate s v
1503− , subscriberInvalidateHeight = \old -> do
1504− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b -> do
1505− FastWeakBag.traverse b $ \s -> do
1506− subscriberInvalidateHeight s old
1507− , subscriberRecalculateHeight = \new -> do
1508− FastMutableIntMap.for_ (_fanInt_subscribers self) $ \b -> do
1509− FastWeakBag.traverse b $ \s -> do
1510− subscriberRecalculateHeight s new
1513− writeIORef (_fanInt_subscriptionRef self) subscription
1514− writeIORef (_fanInt_occRef self) $ fromMaybe IntMap.empty parentOcc
1515− scheduleIntClear $ _fanInt_occRef self
1517− b <- FastMutableIntMap.lookup (_fanInt_subscribers self) k >>= \case
1519− b <- FastWeakBag.empty
1520− FastMutableIntMap.insert (_fanInt_subscribers self) k b
1523− t <- liftIO $ FastWeakBag.insert sub b
1524− currentOcc <- readIORef (_fanInt_occRef self)
1525− (EventSubscription _ (EventSubscribed !heightRef _)) <- readIORef (_fanInt_subscriptionRef self)
1526− return (EventSubscription (FastWeakBag.remove t) $! EventSubscribed heightRef $! toAny (_fanInt_subscriptionRef self, t), IntMap.lookup k currentOcc)
1528−{-# INLINABLE getFanSubscribed #-}
1529−getFanSubscribed :: (HasSpiderTimeline x, GCompare k) => k a -> Fan x k -> Subscriber x a -> EventM x (WeakBagTicket, FanSubscribed x k, Maybe a)
1530−getFanSubscribed k f sub = do
1531− mSubscribed <- liftIO $ readIORef $ fanSubscribed f
1532− case mSubscribed of
1533− Just subscribed -> {-# SCC "hitFan" #-} liftIO $ do
1534− sln <- subscribeFanSubscribed k subscribed sub
1535− occ <- readIORef $ fanSubscribedOccurrence subscribed
1536− return (sln, subscribed, coerce $ DMap.lookup k =<< occ)
1537− Nothing -> {-# SCC "missFan" #-} do
1538− subscribedRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribedRef not yet initialized"
1539− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1540− s <- liftIO $ newSubscriberFan subscribedUnsafe
1541− (subscription, parentOcc) <- subscribeAndRead (fanParent f) s
1542− weakSelf <- liftIO $ newIORef $ error "getFanSubscribed: weakSelf not yet initialized"
1543− (subsForK, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupFanSubscribed
1544− subscribersRef <- liftIO $ newIORef $ error "getFanSubscribed: subscribersRef not yet initialized"
1545− occRef <- liftIO $ newIORef parentOcc
1546− when (isJust parentOcc) $ scheduleClear occRef
1547− let subscribed = FanSubscribed
1548− { fanSubscribedCachedSubscribed = fanSubscribed f
1549− , fanSubscribedOccurrence = occRef
1550− , fanSubscribedParent = subscription
1551− , fanSubscribedSubscribers = subscribersRef
1552−#ifdef DEBUG_NODEIDS
1553− , fanSubscribedNodeId = unsafeNodeId f
1556− let !self = (k, subscribed)
1557− liftIO $ writeIORef subscribersRef $! DMap.singleton k $ FanSubscribedChildren subsForK self weakSelf
1558− liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug self "FanSubscribed"
1559− liftIO $ writeIORef subscribedRef $! subscribed
1560− liftIO $ writeIORef (fanSubscribed f) $ Just subscribed
1561− return (slnForSub, subscribed, coerce $ DMap.lookup k =<< parentOcc)
1563−cleanupFanSubscribed :: GCompare k => (k a, FanSubscribed x k) -> IO ()
1564−cleanupFanSubscribed (k, subscribed) = do
1565− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1566− let reducedSubscribers = DMap.delete k subscribers
1567− if DMap.null reducedSubscribers
1569− unsubscribe $ fanSubscribedParent subscribed
1570− -- Not necessary in this case, because this whole FanSubscribed is dead: writeIORef (fanSubscribedSubscribers subscribed) reducedSubscribers
1571− writeIORef (fanSubscribedCachedSubscribed subscribed) Nothing
1572− else writeIORef (fanSubscribedSubscribers subscribed) $! reducedSubscribers
1574−{-# INLINE subscribeFanSubscribed #-}
1575−subscribeFanSubscribed :: GCompare k => k a -> FanSubscribed x k -> Subscriber x a -> IO WeakBagTicket
1576−subscribeFanSubscribed k subscribed sub = do
1577− subscribers <- readIORef $ fanSubscribedSubscribers subscribed
1578− case DMap.lookup k subscribers of
1579− Nothing -> {-# SCC "missSubscribeFanSubscribed" #-} do
1580− let !self = (k, subscribed)
1581− weakSelf <- newIORef =<< mkWeakPtrWithDebug self "FanSubscribed"
1582− (list, sln) <- WeakBag.singleton sub weakSelf cleanupFanSubscribed
1583− writeIORef (fanSubscribedSubscribers subscribed) $! DMap.insertWith (error "subscribeFanSubscribed: key that we just failed to find is present - should be impossible") k (FanSubscribedChildren list self weakSelf) subscribers
1585− Just (FanSubscribedChildren list _ weakSelf) -> {-# SCC "hitSubscribeFanSubscribed" #-} WeakBag.insert sub list weakSelf cleanupFanSubscribed
1587−{-# INLINABLE getSwitchSubscribed #-}
1588−getSwitchSubscribed :: HasSpiderTimeline x => Switch x a -> Subscriber x a -> EventM x (WeakBagTicket, SwitchSubscribed x a, Maybe a)
1589−getSwitchSubscribed s sub = do
1590− mSubscribed <- liftIO $ readIORef $ switchSubscribed s
1591− case mSubscribed of
1592− Just subscribed -> {-# SCC "hitSwitch" #-} liftIO $ do
1593− sln <- subscribeSwitchSubscribed subscribed sub
1594− occ <- readIORef $ switchSubscribedOccurrence subscribed
1595− return (sln, subscribed, occ)
1596− Nothing -> {-# SCC "missSwitch" #-} do
1597− subscribedRef <- liftIO $ newIORef $ error "getSwitchSubscribed: subscribed has not yet been created"
1598− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1599− i <- liftIO $ newInvalidatorSwitch subscribedUnsafe
1600− mySub <- liftIO $ newSubscriberSwitch subscribedUnsafe
1601− wi <- liftIO $ mkWeakPtrWithDebug i "InvalidatorSwitch"
1602− wiRef <- liftIO $ newIORef wi
1603− parentsRef <- liftIO $ newIORef [] --TODO: This should be unnecessary, because it will always be filled with just the single parent behavior
1604− holdInits <- getDeferralQueue
1605− e <- liftIO $ runBehaviorM (readBehaviorTracked (switchParent s)) (Just (wi, parentsRef)) holdInits
1606− (subscription@(EventSubscription _ subd), parentOcc) <- subscribeAndRead e mySub
1607− heightRef <- liftIO $ newIORef =<< getEventSubscribedHeight subd
1608− subscriptionRef <- liftIO $ newIORef subscription
1609− occRef <- liftIO $ newIORef parentOcc
1610− when (isJust parentOcc) $ scheduleClear occRef
1611− weakSelf <- liftIO $ newIORef $ error "getSwitchSubscribed: weakSelf not yet initialized"
1612− (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupSwitchSubscribed
1613− let !subscribed = SwitchSubscribed
1614− { switchSubscribedCachedSubscribed = switchSubscribed s
1615− , switchSubscribedOccurrence = occRef
1616− , switchSubscribedHeight = heightRef
1617− , switchSubscribedSubscribers = subs
1618− , switchSubscribedOwnInvalidator = i
1619− , switchSubscribedOwnWeakInvalidator = wiRef
1620− , switchSubscribedBehaviorParents = parentsRef
1621− , switchSubscribedParent = switchParent s
1622− , switchSubscribedCurrentParent = subscriptionRef
1623− , switchSubscribedWeakSelf = weakSelf
1624−#ifdef DEBUG_NODEIDS
1625− , switchSubscribedNodeId = unsafeNodeId s
1628− liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "switchSubscribedWeakSelf"
1629− liftIO $ writeIORef subscribedRef $! subscribed
1630− liftIO $ writeIORef (switchSubscribed s) $ Just subscribed
1631− return (slnForSub, subscribed, parentOcc)
1633−cleanupSwitchSubscribed :: SwitchSubscribed x a -> IO ()
1634−cleanupSwitchSubscribed subscribed = do
1635− unsubscribe =<< readIORef (switchSubscribedCurrentParent subscribed)
1636− finalize =<< readIORef (switchSubscribedOwnWeakInvalidator subscribed) -- We don't need to get invalidated if we're dead
1637− writeIORef (switchSubscribedCachedSubscribed subscribed) Nothing
1639−{-# INLINE subscribeSwitchSubscribed #-}
1640−subscribeSwitchSubscribed :: SwitchSubscribed x a -> Subscriber x a -> IO WeakBagTicket
1641−subscribeSwitchSubscribed subscribed sub = WeakBag.insert sub (switchSubscribedSubscribers subscribed) (switchSubscribedWeakSelf subscribed) cleanupSwitchSubscribed
1643−{-# INLINABLE getCoincidenceSubscribed #-}
1644−getCoincidenceSubscribed :: forall x a. HasSpiderTimeline x => Coincidence x a -> Subscriber x a -> EventM x (WeakBagTicket, CoincidenceSubscribed x a, Maybe a)
1645−getCoincidenceSubscribed c sub = do
1646− mSubscribed <- liftIO $ readIORef $ coincidenceSubscribed c
1647− case mSubscribed of
1648− Just subscribed -> {-# SCC "hitCoincidence" #-} liftIO $ do
1649− sln <- subscribeCoincidenceSubscribed subscribed sub
1650− occ <- readIORef $ coincidenceSubscribedOccurrence subscribed
1651− return (sln, subscribed, occ)
1652− Nothing -> {-# SCC "missCoincidence" #-} do
1653− subscribedRef <- liftIO $ newIORef $ error "getCoincidenceSubscribed: subscribed has not yet been created"
1654− subscribedUnsafe <- liftIO $ unsafeInterleaveIO $ readIORef subscribedRef
1655− subOuter <- liftIO $ newSubscriberCoincidenceOuter subscribedUnsafe
1656− (outerSubscription@(EventSubscription _ outerSubd), outerOcc) <- subscribeAndRead (coincidenceParent c) subOuter
1657− outerHeight <- liftIO $ getEventSubscribedHeight outerSubd
1658− (occ, height, mInnerSubd) <- case outerOcc of
1659− Nothing -> return (Nothing, outerHeight, Nothing)
1661− (occ, height, innerSubd) <- subscribeCoincidenceInner o outerHeight subscribedUnsafe
1662− return (occ, height, Just innerSubd)
1663− occRef <- liftIO $ newIORef occ
1664− when (isJust occ) $ scheduleClear occRef
1665− heightRef <- liftIO $ newIORef height
1666− innerSubdRef <- liftIO $ newIORef mInnerSubd
1667− scheduleClear innerSubdRef
1668− weakSelf <- liftIO $ newIORef $ error "getCoincidenceSubscribed: weakSelf not yet implemented"
1669− (subs, slnForSub) <- liftIO $ WeakBag.singleton sub weakSelf cleanupCoincidenceSubscribed
1670− let subscribed = CoincidenceSubscribed
1671− { coincidenceSubscribedCachedSubscribed = coincidenceSubscribed c
1672− , coincidenceSubscribedOccurrence = occRef
1673− , coincidenceSubscribedHeight = heightRef
1674− , coincidenceSubscribedSubscribers = subs
1675− , coincidenceSubscribedOuter = subOuter
1676− , coincidenceSubscribedOuterParent = outerSubscription
1677− , coincidenceSubscribedInnerParent = innerSubdRef
1678− , coincidenceSubscribedWeakSelf = weakSelf
1679−#ifdef DEBUG_NODEIDS
1680− , coincidenceSubscribedNodeId = unsafeNodeId c
1683− liftIO $ writeIORef weakSelf =<< evaluate =<< mkWeakPtrWithDebug subscribed "CoincidenceSubscribed"
1684− liftIO $ writeIORef subscribedRef $! subscribed
1685− liftIO $ writeIORef (coincidenceSubscribed c) $ Just subscribed
1686− return (slnForSub, subscribed, occ)
1688−cleanupCoincidenceSubscribed :: CoincidenceSubscribed x a -> IO ()
1689−cleanupCoincidenceSubscribed subscribed = do
1690− unsubscribe $ coincidenceSubscribedOuterParent subscribed
1691− writeIORef (coincidenceSubscribedCachedSubscribed subscribed) Nothing
1693−{-# INLINE subscribeCoincidenceSubscribed #-}
1694−subscribeCoincidenceSubscribed :: CoincidenceSubscribed x a -> Subscriber x a -> IO WeakBagTicket
1695−subscribeCoincidenceSubscribed subscribed sub = WeakBag.insert sub (coincidenceSubscribedSubscribers subscribed) (coincidenceSubscribedWeakSelf subscribed) cleanupCoincidenceSubscribed
1697−{-# INLINE mergeG #-}
1698−mergeG :: forall k q x v. (HasSpiderTimeline x, GCompare k)
1699− => (forall a. q a -> Event x (v a))
1700− -> Dynamic x (PatchDMap k q) -> Event x (DMap k v)
1701−mergeG nt d = cacheEvent (mergeCheap nt d)
1703−{-# INLINE mergeWithMove #-}
1704−mergeWithMove :: forall k v q x. (HasSpiderTimeline x, GCompare k)
1705− => (forall a. q a -> Event x (v a))
1706− -> Dynamic x (PatchDMapWithMove k q) -> Event x (DMap k v)
1707−mergeWithMove nt d = cacheEvent (mergeCheapWithMove nt d)
1709−{-# INLINE [1] mergeCheap #-}
1711− :: forall k x q v. (HasSpiderTimeline x, GCompare k)
1712− => (forall a. q a -> Event x (v a))
1713− -> Dynamic x (PatchDMap k q)
1714− -> Event x (DMap k v)
1715−mergeCheap nt = mergeGCheap' getInitialSubscribers updateMe destroy
1717− updateMe :: MergeUpdateFunc k v x (PatchDMap k q) (MergeSubscribedParent x)
1718− updateMe subscriber heightBagRef oldParents (PatchDMap p) = do
1719− let f (subscriptionsToKill, ps) (k :=> ComposeMaybe me) = do
1720− (mOldSubd, newPs) <- case me of
1721− Nothing -> return $ DMap.updateLookupWithKey (\_ _ -> Nothing) k ps
1723− let s = subscriber $ return k
1724− subscription@(EventSubscription _ subd) <- subscribe (nt e) s
1725− newParentHeight <- liftIO $ getEventSubscribedHeight subd
1726− let newParent = MergeSubscribedParent subscription
1727− liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1728− return $ DMap.insertLookupWithKey' (\_ new _ -> new) k newParent ps
1729− forM_ mOldSubd $ \oldSubd -> do
1730− oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $ unMergeSubscribedParent oldSubd
1731− liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1732− return (maybeToList (unMergeSubscribedParent <$> mOldSubd) ++ subscriptionsToKill, newPs)
1733− foldM f ([], oldParents) $ DMap.toList p
1735− getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParent x)
1736− getInitialSubscribers initialParents subscriber = do
1737− subscribers <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1738− let s = subscriber $ return k
1739− (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead (nt e) s
1740− height <- liftIO $ getEventSubscribedHeight parentSubd
1741− return (fmap (\x -> k :=> x) parentOcc, height, k :=> MergeSubscribedParent subscription)
1742− return ( DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1743− , fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1744− , DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1747− destroy :: MergeDestroyFunc k (MergeSubscribedParent x)
1748− destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParent sub) -> unsubscribe sub
1750−{-# INLINE [1] mergeCheapWithMove #-}
1751−mergeCheapWithMove :: forall k x v q. (HasSpiderTimeline x, GCompare k)
1752− => (forall a. q a -> Event x (v a))
1753− -> Dynamic x (PatchDMapWithMove k q)
1754− -> Event x (DMap k v)
1755−mergeCheapWithMove nt = mergeGCheap' getInitialSubscribers updateMe destroy
1757− updateMe :: MergeUpdateFunc k v x (PatchDMapWithMove k q) (MergeSubscribedParentWithMove x k)
1758− updateMe subscriber heightBagRef oldParents p = do
1759− -- Prepare new parents for insertion
1760− let subscribeParent :: forall a. k a -> Event x (v a) -> EventM x (MergeSubscribedParentWithMove x k a)
1761− subscribeParent k e = do
1762− keyRef <- liftIO $ newIORef k
1763− let s = subscriber $ liftIO $ readIORef keyRef
1764− subscription@(EventSubscription _ subd) <- subscribe e s
1766− newParentHeight <- getEventSubscribedHeight subd
1767− modifyIORef' heightBagRef $ heightBagAdd newParentHeight
1768− return $ MergeSubscribedParentWithMove subscription keyRef
1769− p' <- PatchDMapWithMove.traversePatchDMapWithMoveWithKey (\k q -> subscribeParent k (nt q)) p
1770− -- Collect old parents for deletion and update the keys of moved parents
1771− let moveOrDelete :: forall a. k a -> PatchDMapWithMove.NodeInfo k q a -> MergeSubscribedParentWithMove x k a -> Constant (EventM x (Maybe (EventSubscription x))) a
1772− moveOrDelete _ ni parent = Constant $ case getComposeMaybe $ PatchDMapWithMove._nodeInfo_to ni of
1774− oldHeight <- liftIO $ getEventSubscribedHeight $ _eventSubscription_subscribed $ _mergeSubscribedParentWithMove_subscription parent
1775− liftIO $ modifyIORef heightBagRef $ heightBagRemove oldHeight
1776− return $ Just $ _mergeSubscribedParentWithMove_subscription parent
1778− liftIO $ writeIORef (_mergeSubscribedParentWithMove_key parent) $! toKey
1780− toDelete <- fmap catMaybes $ mapM (\(_ :=> v) -> getConstant v) $ DMap.toList $ DMap.intersectionWithKey moveOrDelete (unPatchDMapWithMove p) oldParents
1781− return (toDelete, applyAlways p' oldParents)
1782− getInitialSubscribers :: MergeInitFunc k v q x (MergeSubscribedParentWithMove x k)
1783− getInitialSubscribers initialParents subscriber = do
1784− subscribers <- forM (DMap.toList initialParents) $ \(k :=> e) -> do
1785− keyRef <- liftIO $ newIORef k
1786− let s = subscriber $ liftIO $ readIORef keyRef
1787− (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead (nt e) s
1788− height <- liftIO $ getEventSubscribedHeight parentSubd
1789− return (fmap (\x -> k :=> x) parentOcc, height, k :=> MergeSubscribedParentWithMove subscription keyRef)
1790− return ( DMap.fromDistinctAscList $ mapMaybe (\(x, _, _) -> x) subscribers
1791− , fmap (\(_, h, _) -> h) subscribers --TODO: Assert that there's no invalidHeight in here
1792− , DMap.fromDistinctAscList $ map (\(_, _, x) -> x) subscribers
1795− destroy :: MergeDestroyFunc k (MergeSubscribedParentWithMove x k)
1796− destroy s = forM_ (DMap.toList s) $ \(_ :=> MergeSubscribedParentWithMove sub _) -> unsubscribe sub
1798−type MergeUpdateFunc k v x p s
1799− = (forall a. EventM x (k a) -> Subscriber x (v a))
1803− -> EventM x ([EventSubscription x], DMap k s)
1805−type MergeInitFunc k v q x s
1807− -> (forall a. EventM x (k a) -> Subscriber x (v a))
1808− -> EventM x (DMap k v, [Height], DMap k s)
1810−type MergeDestroyFunc k s
1814−data Merge x k v s = Merge
1815− { _merge_parentsRef :: {-# UNPACK #-} !(IORef (DMap k s))
1816− , _merge_heightBagRef :: {-# UNPACK #-} !(IORef HeightBag)
1817− , _merge_heightRef :: {-# UNPACK #-} !(IORef Height)
1818− , _merge_sub :: {-# UNPACK #-} !(Subscriber x (DMap k v))
1819− , _merge_accumRef :: {-# UNPACK #-} !(IORef (DMap k v))
1822−invalidateMergeHeight :: Merge x k v s -> IO ()
1823−invalidateMergeHeight m = invalidateMergeHeight' (_merge_heightRef m) (_merge_sub m)
1825−invalidateMergeHeight' :: IORef Height -> Subscriber x a -> IO ()
1826−invalidateMergeHeight' heightRef sub = do
1827− oldHeight <- readIORef heightRef
1828− 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
1829− writeIORef heightRef $! invalidHeight
1830− subscriberInvalidateHeight sub oldHeight
1832−revalidateMergeHeight :: Merge x k v s -> IO ()
1833−revalidateMergeHeight m = do
1834− currentHeight <- readIORef $ _merge_heightRef m
1835− when (currentHeight == invalidHeight) $ do -- revalidateMergeHeight may be called multiple times; perhaps the's a way to finesse it to avoid this check
1836− heights <- readIORef $ _merge_heightBagRef m
1837− parents <- readIORef $ _merge_parentsRef m
1838− -- When the number of heights in the bag reaches the number of parents, we should have a valid height
1839− case heightBagSize heights `compare` DMap.size parents of
1842− let height = succHeight $ heightBagMax heights
1843− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
1844− writeIORef (_merge_heightRef m) $! height
1845− subscriberRecalculateHeight (_merge_sub m) height
1846− GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show (DMap.size parents) <> ") for Merge"
1848−scheduleMergeSelf :: HasSpiderTimeline x => Merge x k v s -> Height -> EventM x ()
1849−scheduleMergeSelf m height = scheduleMerge' height (_merge_heightRef m) $ do
1850− vals <- liftIO $ readIORef $ _merge_accumRef m
1851− liftIO $ writeIORef (_merge_accumRef m) $! DMap.empty -- Once we're done with this, we can clear it immediately, because if there's a cacheEvent in front of us, it'll handle subsequent subscribers, and if not, we won't get subsequent subscribers
1852− --TODO: Assert that m is not empty
1853− subscriberPropagate (_merge_sub m) vals
1855−mergeSubscriber :: forall x k v s a. (HasSpiderTimeline x, GCompare k) => Merge x k v s -> EventM x (k a) -> Subscriber x (v a)
1856−mergeSubscriber m getKey = Subscriber
1857− { subscriberPropagate = \a -> do
1858− oldM <- liftIO $ readIORef $ _merge_accumRef m
1860− let newM = DMap.insertWith (error $ "Same key fired multiple times for Merge") k a oldM
1861− tracePropagate (Proxy :: Proxy x) $ " DMap.size oldM = " <> show (DMap.size oldM) <> "; DMap.size newM = " <> show (DMap.size newM)
1862− liftIO $ writeIORef (_merge_accumRef m) $! newM
1863− when (DMap.null oldM) $ do -- Only schedule the firing once
1864− height <- liftIO $ readIORef $ _merge_heightRef m
1865− --TODO: assertions about height
1866− currentHeight <- getCurrentHeight
1867− when (height <= currentHeight) $ do
1868− if height /= invalidHeight
1870− myStack <- liftIO $ whoCreatedIORef undefined --TODO
1871− error $ "Height (" ++ show height ++ ") is not greater than current height (" ++ show currentHeight ++ ")\n" ++ unlines (reverse myStack)
1874− nodesInvolvedInCycle <- walkInvalidHeightParents $ eventSubscribedMerge subscribed
1875− stacks <- forM nodesInvolvedInCycle $ \(Some.This es) -> whoCreatedEventSubscribed es
1876− let cycleInfo = ":\n" <> drawForest (listsToForest stacks)
1880− error $ "Causality loop found" <> cycleInfo
1881− scheduleMergeSelf m height
1882− , subscriberInvalidateHeight = \old -> do --TODO: When removing a parent doesn't actually change the height, maybe we can avoid invalidating
1883− modifyIORef' (_merge_heightBagRef m) $ heightBagRemove old
1884− invalidateMergeHeight m
1885− , subscriberRecalculateHeight = \new -> do
1886− modifyIORef' (_merge_heightBagRef m) $ heightBagAdd new
1887− revalidateMergeHeight m
1890−--TODO: Be able to run as much of this as possible promptly
1891−updateMerge :: (HasSpiderTimeline x, GCompare k) => Merge x k v s -> MergeUpdateFunc k v x p s -> p -> SomeMergeUpdate x
1892−updateMerge m updateFunc p = SomeMergeUpdate updateMe (invalidateMergeHeight m) (revalidateMergeHeight m)
1893− where updateMe = do
1894− oldParents <- liftIO $ readIORef $ _merge_parentsRef m
1895− (subscriptionsToKill, newParents) <- updateFunc (mergeSubscriber m) (_merge_heightBagRef m) oldParents p
1896− liftIO $ writeIORef (_merge_parentsRef m) $! newParents
1897− return subscriptionsToKill
1899−{-# INLINE mergeGCheap' #-}
1900−mergeGCheap' :: forall k v x p s q. (HasSpiderTimeline x, GCompare k, PatchTarget p ~ DMap k q)
1901− => MergeInitFunc k v q x s -> MergeUpdateFunc k v x p s -> MergeDestroyFunc k s -> Dynamic x p -> Event x (DMap k v)
1902−mergeGCheap' getInitialSubscribers updateFunc destroy d = Event $ \sub -> do
1903− initialParents <- readBehaviorUntracked $ dynamicCurrent d
1904− accumRef <- liftIO $ newIORef $ error "merge: accumRef not yet initialized"
1905− heightRef <- liftIO $ newIORef $ error "merge: heightRef not yet initialized"
1906− heightBagRef <- liftIO $ newIORef $ error "merge: heightBagRef not yet initialized"
1907− parentsRef :: IORef (DMap k s) <- liftIO $ newIORef $ error "merge: parentsRef not yet initialized"
1909− { _merge_parentsRef = parentsRef
1910− , _merge_heightBagRef = heightBagRef
1911− , _merge_heightRef = heightRef
1913− , _merge_accumRef = accumRef
1915− (dm, heights, initialParentState) <- getInitialSubscribers initialParents $ mergeSubscriber m
1916− let myHeightBag = heightBagFromList $ filter (/= invalidHeight) heights
1917− myHeight = if invalidHeight `elem` heights
1919− else succHeight $ heightBagMax myHeightBag
1920− currentHeight <- getCurrentHeight
1921− let (occ, accum) = if currentHeight >= myHeight -- If we should have fired by now
1922− then (if DMap.null dm then Nothing else Just dm, DMap.empty)
1924− unless (DMap.null accum) $ do
1925− scheduleMergeSelf m myHeight
1926− liftIO $ writeIORef accumRef $! accum
1927− liftIO $ writeIORef heightRef $! myHeight
1928− liftIO $ writeIORef heightBagRef $! myHeightBag
1929− changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
1930− liftIO $ writeIORef parentsRef $! initialParentState
1931− defer $ SomeMergeInit $ do
1933− { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
1934− tracePropagate (Proxy :: Proxy x) $ "SubscriberMerge/Change"
1935− defer $ updateMerge m updateFunc a
1936− , subscriberInvalidateHeight = \_ -> return ()
1937− , subscriberRecalculateHeight = \_ -> return ()
1939− (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) s
1940− forM_ change $ \c -> defer $ updateMerge m updateFunc c
1941− -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
1942− -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
1943− -- its subscription.
1944− liftIO $ writeIORef changeSubdRef (s, changeSubscription)
1945− let unsubscribeAll = destroy =<< readIORef parentsRef
1946− return ( EventSubscription unsubscribeAll $ EventSubscribed heightRef $ toAny (parentsRef, changeSubdRef)
1950−mergeInt :: forall x a. (HasSpiderTimeline x) => Dynamic x (PatchIntMap (Event x a)) -> Event x (IntMap a)
1951−mergeInt = cacheEvent . mergeIntCheap
1953−{-# INLINABLE mergeIntCheap #-}
1954−mergeIntCheap :: forall x a. (HasSpiderTimeline x) => Dynamic x (PatchIntMap (Event x a)) -> Event x (IntMap a)
1955−mergeIntCheap d = Event $ \sub -> do
1956− initialParents <- readBehaviorUntracked $ dynamicCurrent d
1957− accum <- liftIO $ FastMutableIntMap.newEmpty
1958− heightRef <- liftIO $ newIORef zeroHeight
1959− heightBagRef <- liftIO $ newIORef heightBagEmpty
1960− parents <- liftIO $ FastMutableIntMap.newEmpty
1961− let scheduleSelf = do
1962− height <- liftIO $ readIORef $ heightRef
1963− scheduleMerge' height heightRef $ do
1964− vals <- liftIO $ FastMutableIntMap.getFrozenAndClear accum
1965− subscriberPropagate sub vals
1966− invalidateMyHeight = do
1967− invalidateMergeHeight' heightRef sub
1968− recalculateMyHeight = do
1969− currentHeight <- readIORef heightRef
1970− 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?
1971− heights <- readIORef heightBagRef
1972− numParents <- FastMutableIntMap.size parents
1973− case heightBagSize heights `compare` numParents of
1976− let height = succHeight $ heightBagMax heights
1977− when debugInvalidateHeight $ putStrLn $ "recalculateSubscriberHeight: height: " <> show height
1978− writeIORef heightRef $! height
1979− subscriberRecalculateHeight sub height
1980− GT -> error $ "revalidateMergeHeight: more heights (" <> show (heightBagSize heights) <> ") than parents (" <> show numParents <> ") for Merge"
1981− mySubscriber k = Subscriber
1982− { subscriberPropagate = \a -> do
1983− wasEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
1984− liftIO $ FastMutableIntMap.insert accum k a
1985− when wasEmpty scheduleSelf
1986− , subscriberInvalidateHeight = \old -> do
1987− modifyIORef' heightBagRef $ heightBagRemove old
1989− , subscriberRecalculateHeight = \new -> do
1990− modifyIORef' heightBagRef $ heightBagAdd new
1991− recalculateMyHeight
1993− forM_ (IntMap.toList initialParents) $ \(k, p) -> do
1994− (subscription@(EventSubscription _ parentSubd), parentOcc) <- subscribeAndRead p $ mySubscriber k
1996− forM_ parentOcc $ FastMutableIntMap.insert accum k
1997− FastMutableIntMap.insert parents k subscription
1998− height <- getEventSubscribedHeight parentSubd
1999− if height == invalidHeight
2000− then writeIORef heightRef invalidHeight
2002− modifyIORef' heightBagRef $ heightBagAdd height
2003− modifyIORef' heightRef $ \oldHeight ->
2004− if oldHeight == invalidHeight
2006− else max (succHeight height) oldHeight
2007− myHeight <- liftIO $ readIORef heightRef
2008− currentHeight <- getCurrentHeight
2009− isEmpty <- liftIO $ FastMutableIntMap.isEmpty accum
2010− occ <- if currentHeight >= myHeight -- If we should have fired by now
2012− then return Nothing
2013− else liftIO $ Just <$> FastMutableIntMap.getFrozenAndClear accum
2014− else do when (not isEmpty) scheduleSelf -- We have things accumulated, but we shouldn't have fired them yet
2016− changeSubdRef <- liftIO $ newIORef $ error "getMergeSubscribed: changeSubdRef not yet initialized"
2017− defer $ SomeMergeInit $ do
2018− let updateMe a = SomeMergeUpdate u invalidateMyHeight recalculateMyHeight
2021− let f k newParent = do
2022− subscription@(EventSubscription _ subd) <- subscribe newParent $ mySubscriber k
2023− newParentHeight <- liftIO $ getEventSubscribedHeight subd
2024− liftIO $ modifyIORef' heightBagRef $ heightBagAdd newParentHeight
2025− return subscription
2026− newSubscriptions <- FastMutableIntMap.traverseIntMapPatchWithKey f a
2027− oldParents <- liftIO $ FastMutableIntMap.applyPatch parents newSubscriptions
2028− liftIO $ for_ oldParents $ \oldParent -> do
2029− oldParentHeight <- getEventSubscribedHeight $ _eventSubscription_subscribed oldParent
2030− modifyIORef' heightBagRef $ heightBagRemove oldParentHeight
2031− return $ IntMap.elems oldParents
2033− { subscriberPropagate = \a -> {-# SCC "traverseMergeChange" #-} do
2034− tracePropagate (Proxy :: Proxy x) $ "SubscriberMergeInt/Change"
2036− , subscriberInvalidateHeight = \_ -> return ()
2037− , subscriberRecalculateHeight = \_ -> return ()
2039− (changeSubscription, change) <- subscribeAndRead (dynamicUpdated d) s
2040− forM_ change $ \c -> defer $ updateMe c
2041− -- We explicitly hold on to the unsubscribe function from subscribing to the update event.
2042− -- If we don't do this, there are certain cases where mergeCheap will fail to properly retain
2043− -- its subscription.
2044− liftIO $ writeIORef changeSubdRef (s, changeSubscription)
2045− let unsubscribeAll = traverse_ unsubscribe =<< FastMutableIntMap.getFrozenAndClear parents
2046− return ( EventSubscription unsubscribeAll $ EventSubscribed heightRef $ toAny (parents, changeSubdRef)
2050−newtype EventSelector x k = EventSelector { select :: forall a. k a -> Event x a }
2052−fan :: (HasSpiderTimeline x, GCompare k) => Event x (DMap k Identity) -> EventSelector x k
2056− , fanSubscribed = unsafeNewIORef e Nothing
2058− in EventSelector $ \k -> eventFan k f
2060−runHoldInits :: HasSpiderTimeline x => IORef [SomeHoldInit x] -> IORef [SomeDynInit x] -> IORef [SomeMergeInit x] -> EventM x ()
2061−runHoldInits holdInitRef dynInitRef mergeInitRef = do
2062− holdInits <- liftIO $ readIORef holdInitRef
2063− dynInits <- liftIO $ readIORef dynInitRef
2064− mergeInits <- liftIO $ readIORef mergeInitRef
2065− unless (null holdInits && null dynInits && null mergeInits) $ do
2066− liftIO $ writeIORef holdInitRef []
2067− liftIO $ writeIORef dynInitRef []
2068− liftIO $ writeIORef mergeInitRef []
2069− mapM_ initHold holdInits
2070− mapM_ initDyn dynInits
2071− mapM_ unSomeMergeInit mergeInits
2072− runHoldInits holdInitRef dynInitRef mergeInitRef
2074−initHold :: HasSpiderTimeline x => SomeHoldInit x -> EventM x ()
2075−initHold (SomeHoldInit h) = void $ getHoldEventSubscription h
2077−initDyn :: HasSpiderTimeline x => SomeDynInit x -> EventM x ()
2078−initDyn (SomeDynInit d) = void $ getDynHold d
2080−newEventEnv :: IO (EventEnv x)
2082− toAssignRef <- newIORef [] -- This should only actually get used when events are firing
2083− holdInitRef <- newIORef []
2084− dynInitRef <- newIORef []
2085− mergeUpdateRef <- newIORef []
2086− mergeInitRef <- newIORef []
2087− heightRef <- newIORef zeroHeight
2088− toClearRef <- newIORef []
2089− toClearIntRef <- newIORef []
2090− toClearRootRef <- newIORef []
2091− coincidenceInfosRef <- newIORef []
2092− delayedRef <- newIORef IntMap.empty
2093− return $ EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef
2095−clearEventEnv :: EventEnv x -> IO ()
2096−clearEventEnv (EventEnv toAssignRef holdInitRef dynInitRef mergeUpdateRef mergeInitRef toClearRef toClearIntRef toClearRootRef heightRef coincidenceInfosRef delayedRef) = do
2097− writeIORef toAssignRef []
2098− writeIORef holdInitRef []
2099− writeIORef dynInitRef []
2100− writeIORef mergeUpdateRef []
2101− writeIORef mergeInitRef []
2102− writeIORef heightRef zeroHeight
2103− writeIORef toClearRef []
2104− writeIORef toClearIntRef []
2105− writeIORef toClearRootRef []
2106− writeIORef coincidenceInfosRef []
2107− writeIORef delayedRef IntMap.empty
2109−-- | Run an event action outside of a frame
2110−runFrame :: forall x a. HasSpiderTimeline x => EventM x a -> SpiderHost x a --TODO: This function also needs to hold the mutex
2111−runFrame a = SpiderHost $ do
2112− let env = _spiderTimeline_eventEnv (spiderTimeline :: SpiderTimelineEnv x)
2115− 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
2117− result <- runEventM go
2118− toClear <- readIORef $ eventEnvClears env
2119− forM_ toClear $ \(Some.This (Clear ref)) -> {-# SCC "clear" #-} writeIORef ref Nothing
2120− toClearInt <- readIORef $ eventEnvIntClears env
2121− forM_ toClearInt $ \(Some.This (IntClear ref)) -> {-# SCC "intClear" #-} writeIORef ref $! IntMap.empty
2122− toClearRoot <- readIORef $ eventEnvRootClears env
2123− forM_ toClearRoot $ \(Some.This (RootClear ref)) -> {-# SCC "rootClear" #-} writeIORef ref $! DMap.empty
2124− toAssign <- readIORef $ eventEnvAssignments env
2125− toReconnectRef <- newIORef []
2126− coincidenceInfos <- readIORef $ eventEnvResetCoincidences env
2127− forM_ toAssign $ \(SomeAssignment vRef iRef v) -> {-# SCC "assignment" #-} do
2129− when debugInvalidate $ putStrLn $ "Invalidating Hold"
2130− writeIORef iRef =<< evaluate =<< invalidate toReconnectRef =<< readIORef iRef
2131− mergeUpdates <- readIORef $ eventEnvMergeUpdates env
2132− writeIORef (eventEnvMergeUpdates env) []
2133− when debugPropagate $ putStrLn "Updating merges"
2134− mergeSubscriptionsToKill <- runEventM $ concat <$> mapM _someMergeUpdate_update mergeUpdates
2135− when debugPropagate $ putStrLn "Updating merges done"
2136− toReconnect <- readIORef toReconnectRef
2138− switchSubscriptionsToKill <- forM toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
2139− oldSubscription <- readIORef $ switchSubscribedCurrentParent subscribed
2140− wi <- readIORef $ switchSubscribedOwnWeakInvalidator subscribed
2141− when debugInvalidate $ putStrLn $ "Finalizing invalidator for Switch" <> showNodeId subscribed
2143− i <- evaluate $ switchSubscribedOwnInvalidator subscribed
2144− wi' <- mkWeakPtrWithDebug i "wi'"
2145− writeIORef (switchSubscribedOwnWeakInvalidator subscribed) $! wi'
2146− writeIORef (switchSubscribedBehaviorParents subscribed) []
2147− writeIORef (eventEnvHoldInits env) [] --TODO: Should we reuse this?
2148− e <- runBehaviorM (readBehaviorTracked (switchSubscribedParent subscribed)) (Just (wi', switchSubscribedBehaviorParents subscribed)) $ eventEnvHoldInits env
2149− 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
2150− --TODO: Make sure we touch the pieces of the SwitchSubscribed at the appropriate times
2151− sub <- newSubscriberSwitch subscribed
2152− 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
2154− stackTrace <- liftIO $ fmap renderStack $ ccsToStrings =<< (getCCSOf $! switchSubscribedParent subscribed)
2155− liftIO $ putStrLn $ (++stackTrace) $ "subd' subscribed to " ++ case e of
2156− EventRoot _ -> "EventRoot"
2157− EventNever -> "EventNever"
2158− _ -> "something else"
2160− writeIORef (switchSubscribedCurrentParent subscribed) $! subscription
2161− return oldSubscription
2162− liftIO $ mapM_ unsubscribe mergeSubscriptionsToKill
2163− liftIO $ mapM_ unsubscribe switchSubscriptionsToKill
2164− forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> {-# SCC "switchSubscribed" #-} do
2165− EventSubscription _ subd' <- readIORef $ switchSubscribedCurrentParent subscribed
2166− parentHeight <- getEventSubscribedHeight subd'
2167− myHeight <- readIORef $ switchSubscribedHeight subscribed
2168− when (parentHeight /= myHeight) $ do
2169− writeIORef (switchSubscribedHeight subscribed) $! invalidHeight
2170− WeakBag.traverse (switchSubscribedSubscribers subscribed) $ invalidateSubscriberHeight myHeight
2171− 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
2172− forM_ coincidenceInfos $ \(SomeResetCoincidence subscription mcs) -> do
2173− unsubscribe subscription
2174− mapM_ invalidateCoincidenceHeight mcs
2175− forM_ coincidenceInfos $ \(SomeResetCoincidence _ mcs) -> mapM_ recalculateCoincidenceHeight mcs
2176− mapM_ _someMergeUpdate_recalculateHeight mergeUpdates
2177− forM_ toReconnect $ \(SomeSwitchSubscribed subscribed) -> do
2178− height <- calculateSwitchHeight subscribed
2179− updateSwitchHeight height subscribed
2182−newtype Height = Height { unHeight :: Int } deriving (Show, Read, Eq, Ord, Bounded)
2184−{-# INLINE zeroHeight #-}
2185−zeroHeight :: Height
2186−zeroHeight = Height 0
2188−{-# INLINE invalidHeight #-}
2189−invalidHeight :: Height
2190−invalidHeight = Height (-1000)
2193−-- | An invalid height that is currently being traversed, e.g. by walkInvalidHeightParents
2194−{-# INLINE invalidHeightBeingTraversed #-}
2195−invalidHeightBeingTraversed :: Height
2196−invalidHeightBeingTraversed = Height (-1001)
2199−{-# INLINE succHeight #-}
2200−succHeight :: Height -> Height
2201−succHeight h@(Height a) =
2202− if h == invalidHeight
2204− else Height $ succ a
2206−invalidateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
2207−invalidateCoincidenceHeight subscribed = do
2208− oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
2209− when (oldHeight /= invalidHeight) $ do
2210− writeIORef (coincidenceSubscribedHeight subscribed) $! invalidHeight
2211− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ invalidateSubscriberHeight oldHeight
2213−updateSwitchHeight :: Height -> SwitchSubscribed x a -> IO ()
2214−updateSwitchHeight new subscribed = do
2215− oldHeight <- readIORef $ switchSubscribedHeight subscribed
2216− when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
2217− when (new /= invalidHeight) $ do --TODO: This 'when' should probably be an assertion
2218− writeIORef (switchSubscribedHeight subscribed) $! new
2219− WeakBag.traverse (switchSubscribedSubscribers subscribed) $ recalculateSubscriberHeight new
2221−recalculateCoincidenceHeight :: CoincidenceSubscribed x a -> IO ()
2222−recalculateCoincidenceHeight subscribed = do
2223− oldHeight <- readIORef $ coincidenceSubscribedHeight subscribed
2224− when (oldHeight == invalidHeight) $ do --TODO: This 'when' should probably be an assertion
2225− height <- calculateCoincidenceHeight subscribed
2226− when (height /= invalidHeight) $ do
2227− writeIORef (coincidenceSubscribedHeight subscribed) $! height
2228− WeakBag.traverse (coincidenceSubscribedSubscribers subscribed) $ recalculateSubscriberHeight height
2230−calculateSwitchHeight :: SwitchSubscribed x a -> IO Height
2231−calculateSwitchHeight subscribed = getEventSubscribedHeight . _eventSubscription_subscribed =<< readIORef (switchSubscribedCurrentParent subscribed)
2233−calculateCoincidenceHeight :: CoincidenceSubscribed x a -> IO Height
2234−calculateCoincidenceHeight subscribed = do
2235− outerHeight <- getEventSubscribedHeight $ _eventSubscription_subscribed $ coincidenceSubscribedOuterParent subscribed
2236− innerHeight <- maybe (return zeroHeight) getEventSubscribedHeight =<< readIORef (coincidenceSubscribedInnerParent subscribed)
2237− return $ if outerHeight == invalidHeight || innerHeight == invalidHeight then invalidHeight else max outerHeight innerHeight
2239−data SomeSwitchSubscribed x = forall a. SomeSwitchSubscribed {-# NOUNPACK #-} (SwitchSubscribed x a)
2241−invalidate :: IORef [SomeSwitchSubscribed x] -> WeakList (Invalidator x) -> IO (WeakList (Invalidator x))
2242−invalidate toReconnectRef wis = do
2243− forM_ wis $ \wi -> do
2247− traceInvalidate "invalidate Dead"
2248− return () --TODO: Should we clean this up here?
2250− finalize wi -- Once something's invalidated, it doesn't need to hang around; this will change when some things are strict
2252− InvalidatorPull p -> do
2253− traceInvalidate $ "invalidate: Pull" <> showNodeId p
2254− mVal <- readIORef $ pullValue p
2255− forM_ mVal $ \val -> do
2256− writeIORef (pullValue p) Nothing
2257− writeIORef (pullSubscribedInvalidators val) =<< evaluate =<< invalidate toReconnectRef =<< readIORef (pullSubscribedInvalidators val)
2258− InvalidatorSwitch subscribed -> do
2259− traceInvalidate $ "invalidate: Switch" <> showNodeId subscribed
2260− modifyIORef' toReconnectRef (SomeSwitchSubscribed subscribed :)
2261− return [] -- Since we always finalize everything, always return an empty list --TODO: There are some things that will need to be re-subscribed every time; we should try to avoid finalizing them
2263−--------------------------------------------------------------------------------
2264−-- Reflex integration
2265−--------------------------------------------------------------------------------
2267−-- | Designates the default, global Spider timeline
2268−data SpiderTimeline x
2269−type role SpiderTimeline nominal
2271−-- | The default, global Spider environment
2272−type Spider = SpiderTimeline Global
2274−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (EventM x) where
2275− {-# INLINABLE sample #-}
2276− sample (SpiderBehavior b) = readBehaviorUntracked b
2278−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (EventM x) where
2279− {-# INLINABLE hold #-}
2280− hold = holdSpiderEventM
2281− {-# INLINABLE holdDyn #-}
2282− holdDyn = holdDynSpiderEventM
2283− {-# INLINABLE holdIncremental #-}
2284− holdIncremental = holdIncrementalSpiderEventM
2285− {-# INLINABLE buildDynamic #-}
2286− buildDynamic = buildDynamicSpiderEventM
2287− {-# INLINABLE headE #-}
2288− headE = R.slowHeadE
2289−-- headE (SpiderEvent e) = SpiderEvent <$> Reflex.Spider.Internal.headE e
2291−instance Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPullM x) where
2292− {-# INLINABLE sample #-}
2293− sample = coerce . readBehaviorTracked . unSpiderBehavior
2295−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderPushM x) where
2296− {-# INLINABLE sample #-}
2297− sample (SpiderBehavior b) = SpiderPushM $ readBehaviorUntracked b
2299−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderPushM x) where
2300− {-# INLINABLE hold #-}
2301− hold v0 e = Reflex.Class.current <$> Reflex.Class.holdDyn v0 e
2302− {-# INLINABLE holdDyn #-}
2303− holdDyn v0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce e
2304− {-# INLINABLE holdIncremental #-}
2305− holdIncremental v0 (SpiderEvent e) = SpiderPushM $ SpiderIncremental . dynamicHold <$> Reflex.Spider.Internal.hold v0 e
2306− {-# INLINABLE buildDynamic #-}
2307− buildDynamic getV0 (SpiderEvent e) = SpiderPushM $ fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce e
2308− {-# INLINABLE headE #-}
2309− headE = R.slowHeadE
2310−-- headE (SpiderEvent e) = SpiderPushM $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2312−instance HasSpiderTimeline x => Monad (Reflex.Class.Dynamic (SpiderTimeline x)) where
2313− {-# INLINE return #-}
2315− {-# INLINE (>>=) #-}
2316− x >>= f = SpiderDynamic $ dynamicDynIdentity $ newJoinDyn $ newMapDyn (unSpiderDynamic . f) $ unSpiderDynamic x
2317− {-# INLINE (>>) #-}
2319− {-# INLINE fail #-}
2320− fail _ = error "Dynamic does not support 'fail'"
2322−{-# INLINABLE newJoinDyn #-}
2323−newJoinDyn :: HasSpiderTimeline x => Reflex.Spider.Internal.Dynamic x (Identity (Reflex.Spider.Internal.Dynamic x (Identity a))) -> Reflex.Spider.Internal.Dyn x (Identity a)
2325− let readV0 = readBehaviorTracked . dynamicCurrent =<< readBehaviorTracked (dynamicCurrent d)
2326− eOuter = Reflex.Spider.Internal.push (fmap (Just . Identity) . readBehaviorUntracked . dynamicCurrent . runIdentity) $ dynamicUpdated d
2327− eInner = Reflex.Spider.Internal.switch $ dynamicUpdated <$> dynamicCurrent d
2328− eBoth = Reflex.Spider.Internal.coincidence $ dynamicUpdated . runIdentity <$> dynamicUpdated d
2329− v' = unSpiderEvent $ Reflex.Class.leftmost $ map SpiderEvent [eBoth, eOuter, eInner]
2330− in Reflex.Spider.Internal.unsafeBuildDynamic readV0 v'
2332−instance HasSpiderTimeline x => Functor (Reflex.Class.Dynamic (SpiderTimeline x)) where
2333− fmap = mapDynamicSpider
2334− x <$ d = R.unsafeBuildDynamic (return x) $ x <$ R.updated d
2336−mapDynamicSpider :: HasSpiderTimeline x => (a -> b) -> Reflex.Class.Dynamic (SpiderTimeline x) a -> Reflex.Class.Dynamic (SpiderTimeline x) b
2337−mapDynamicSpider f = SpiderDynamic . newMapDyn f . unSpiderDynamic
2338−{-# INLINE [1] mapDynamicSpider #-}
2340−instance HasSpiderTimeline x => Applicative (Reflex.Class.Dynamic (SpiderTimeline x)) where
2341− pure = SpiderDynamic . dynamicConst
2342−#if MIN_VERSION_base(4,10,0)
2343− liftA2 f a b = SpiderDynamic $ Reflex.Spider.Internal.zipDynWith f (unSpiderDynamic a) (unSpiderDynamic b)
2345− SpiderDynamic a <*> SpiderDynamic b = SpiderDynamic $ Reflex.Spider.Internal.zipDynWith ($) a b
2346− a *> b = R.unsafeBuildDynamic (R.sample $ R.current b) $ R.leftmost [R.updated b, R.tag (R.current b) $ R.updated a]
2347− (<*) = flip (*>) -- There are no effects, so order doesn't matter
2349−holdSpiderEventM :: HasSpiderTimeline x => a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Behavior (SpiderTimeline x) a)
2350−holdSpiderEventM v0 e = fmap (SpiderBehavior . behaviorHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2352−holdDynSpiderEventM :: HasSpiderTimeline x => a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Dynamic (SpiderTimeline x) a)
2353−holdDynSpiderEventM v0 e = fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2355−holdIncrementalSpiderEventM :: (HasSpiderTimeline x, Patch p) => PatchTarget p -> Reflex.Class.Event (SpiderTimeline x) p -> EventM x (Reflex.Class.Incremental (SpiderTimeline x) p)
2356−holdIncrementalSpiderEventM v0 e = fmap (SpiderIncremental . dynamicHold) $ Reflex.Spider.Internal.hold v0 $ unSpiderEvent e
2358−buildDynamicSpiderEventM :: HasSpiderTimeline x => SpiderPushM x a -> Reflex.Class.Event (SpiderTimeline x) a -> EventM x (Reflex.Class.Dynamic (SpiderTimeline x) a)
2359−buildDynamicSpiderEventM getV0 e = fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce $ unSpiderEvent e
2361−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderHost x) where
2362− {-# INLINABLE hold #-}
2363− hold v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.hold v0 e
2364− {-# INLINABLE holdDyn #-}
2365− holdDyn v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.holdDyn v0 e
2366− {-# INLINABLE holdIncremental #-}
2367− holdIncremental v0 e = runFrame . runSpiderHostFrame $ Reflex.Class.holdIncremental v0 e
2368− {-# INLINABLE buildDynamic #-}
2369− buildDynamic getV0 e = runFrame . runSpiderHostFrame $ Reflex.Class.buildDynamic getV0 e
2370− {-# INLINABLE headE #-}
2371− headE e = runFrame . runSpiderHostFrame $ Reflex.Class.headE e
2373−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHostFrame x) where
2374− sample = SpiderHostFrame . readBehaviorUntracked . unSpiderBehavior --TODO: This can cause problems with laziness, so we should get rid of it if we can
2376−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (SpiderHostFrame x) where
2377− {-# INLINABLE hold #-}
2378− hold v0 e = SpiderHostFrame $ fmap (SpiderBehavior . behaviorHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2379− {-# INLINABLE holdDyn #-}
2380− holdDyn v0 e = SpiderHostFrame $ fmap (SpiderDynamic . dynamicHoldIdentity) $ Reflex.Spider.Internal.hold v0 $ coerce $ unSpiderEvent e
2381− {-# INLINABLE holdIncremental #-}
2382− holdIncremental v0 e = SpiderHostFrame $ fmap (SpiderIncremental . dynamicHold) $ Reflex.Spider.Internal.hold v0 $ unSpiderEvent e
2383− {-# INLINABLE buildDynamic #-}
2384− buildDynamic getV0 e = SpiderHostFrame $ fmap (SpiderDynamic . dynamicDynIdentity) $ Reflex.Spider.Internal.buildDynamic (coerce getV0) $ coerce $ unSpiderEvent e
2385− {-# INLINABLE headE #-}
2386− headE = R.slowHeadE
2387−-- headE (SpiderEvent e) = SpiderHostFrame $ SpiderEvent <$> Reflex.Spider.Internal.headE e
2389−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (SpiderHost x) where
2390− {-# INLINABLE sample #-}
2391− sample = runFrame . readBehaviorUntracked . unSpiderBehavior
2393−instance HasSpiderTimeline x => Reflex.Class.MonadSample (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2394− {-# INLINABLE sample #-}
2395− sample = Reflex.Spider.Internal.ReadPhase . Reflex.Class.sample
2397−instance HasSpiderTimeline x => Reflex.Class.MonadHold (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2398− {-# INLINABLE hold #-}
2399− hold v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.hold v0 e
2400− {-# INLINABLE holdDyn #-}
2401− holdDyn v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.holdDyn v0 e
2402− {-# INLINABLE holdIncremental #-}
2403− holdIncremental v0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.holdIncremental v0 e
2404− {-# INLINABLE buildDynamic #-}
2405− buildDynamic getV0 e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.buildDynamic getV0 e
2406− {-# INLINABLE headE #-}
2407− headE e = Reflex.Spider.Internal.ReadPhase $ Reflex.Class.headE e
2409−--------------------------------------------------------------------------------
2411−--------------------------------------------------------------------------------
2413−-- | 'SpiderEnv' is the old name for 'SpiderTimeline'
2414−{-# DEPRECATED SpiderEnv "Use 'SpiderTimelineEnv' instead" #-}
2415−type SpiderEnv = SpiderTimeline
2416−instance HasSpiderTimeline x => Reflex.Host.Class.MonadSubscribeEvent (SpiderTimeline x) (SpiderHostFrame x) where
2417− {-# INLINABLE subscribeEvent #-}
2418− subscribeEvent e = SpiderHostFrame $ do
2419− --TODO: Unsubscribe eventually (manually and/or with weak ref)
2420− val <- liftIO $ newIORef Nothing
2421− subscription <- subscribe (unSpiderEvent e) $ Subscriber
2422− { subscriberPropagate = \a -> do
2423− liftIO $ writeIORef val $ Just a
2425− , subscriberInvalidateHeight = \_ -> return ()
2426− , subscriberRecalculateHeight = \_ -> return ()
2428− return $ SpiderEventHandle
2429− { spiderEventHandleSubscription = subscription
2430− , spiderEventHandleValue = val
2433−instance HasSpiderTimeline x => Reflex.Host.Class.ReflexHost (SpiderTimeline x) where
2434− type EventTrigger (SpiderTimeline x) = RootTrigger x
2435− type EventHandle (SpiderTimeline x) = SpiderEventHandle x
2436− type HostFrame (SpiderTimeline x) = SpiderHostFrame x
2438−instance HasSpiderTimeline x => Reflex.Host.Class.MonadReadEvent (SpiderTimeline x) (Reflex.Spider.Internal.ReadPhase x) where
2439− {-# NOINLINE readEvent #-}
2440− readEvent h = Reflex.Spider.Internal.ReadPhase $ fmap (fmap return) $ liftIO $ do
2441− result <- readIORef $ spiderEventHandleValue h
2445−instance Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHost x) where
2446− newEventWithTrigger = SpiderHost . fmap SpiderEvent . newEventWithTriggerIO
2447− newFanEventWithTrigger f = SpiderHost $ do
2448− es <- newFanEventWithTriggerIO f
2449− return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
2451−instance Reflex.Host.Class.MonadReflexCreateTrigger (SpiderTimeline x) (SpiderHostFrame x) where
2452− newEventWithTrigger = SpiderHostFrame . EventM . liftIO . fmap SpiderEvent . newEventWithTriggerIO
2453− newFanEventWithTrigger f = SpiderHostFrame $ EventM $ liftIO $ do
2454− es <- newFanEventWithTriggerIO f
2455− return $ Reflex.Class.EventSelector $ SpiderEvent . Reflex.Spider.Internal.select es
2457−instance HasSpiderTimeline x => Reflex.Host.Class.MonadSubscribeEvent (SpiderTimeline x) (SpiderHost x) where
2458− {-# INLINABLE subscribeEvent #-}
2459− subscribeEvent = runFrame . runSpiderHostFrame . Reflex.Host.Class.subscribeEvent
2461−instance HasSpiderTimeline x => Reflex.Host.Class.MonadReflexHost (SpiderTimeline x) (SpiderHost x) where
2462− type ReadPhase (SpiderHost x) = Reflex.Spider.Internal.ReadPhase x
2463− fireEventsAndRead es (Reflex.Spider.Internal.ReadPhase a) = run es a
2464− runHostFrame = runFrame . runSpiderHostFrame
2466−unsafeNewSpiderTimelineEnv :: forall x. IO (SpiderTimelineEnv x)
2467−unsafeNewSpiderTimelineEnv = do
2471− depthRef <- newIORef 0
2473− return $ SpiderTimelineEnv
2474− { _spiderTimeline_lock = lock
2475− , _spiderTimeline_eventEnv = env
2477− , _spiderTimeline_depth = depthRef
2481−-- | Create a new SpiderTimelineEnv
2482−newSpiderTimeline :: IO (Some SpiderTimelineEnv)
2483−newSpiderTimeline = withSpiderTimeline (pure . Some.This)
2485−data LocalSpiderTimeline (x :: Type) s
2487−instance Reifies s (SpiderTimelineEnv x) =>
2488− HasSpiderTimeline (LocalSpiderTimeline x s) where
2489− spiderTimeline = localSpiderTimeline (Proxy :: Proxy s) $ reflect (Proxy :: Proxy s)
2493− -> SpiderTimelineEnv x
2494− -> SpiderTimelineEnv (LocalSpiderTimeline x s)
2495−localSpiderTimeline _ = unsafeCoerce
2497−-- | Pass a new timeline to the given function.
2498−withSpiderTimeline :: (forall x. HasSpiderTimeline x => SpiderTimelineEnv x -> IO r) -> IO r
2499−withSpiderTimeline k = do
2500− env <- unsafeNewSpiderTimelineEnv
2501− reify env $ \s -> k $ localSpiderTimeline s env
2503−newtype SpiderPullM (x :: Type) a = SpiderPullM (BehaviorM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2505−type ComputeM = EventM
2507−newtype SpiderPushM (x :: Type) a = SpiderPushM (ComputeM x a) deriving (Functor, Applicative, Monad, MonadIO, MonadFix)
2509−instance HasSpiderTimeline x => R.Reflex (SpiderTimeline x) where
2510− {-# SPECIALIZE instance R.Reflex (SpiderTimeline Global) #-}
2511− newtype Behavior (SpiderTimeline x) a = SpiderBehavior { unSpiderBehavior :: Behavior x a }
2512− newtype Event (SpiderTimeline x) a = SpiderEvent { unSpiderEvent :: Event x a }
2513− newtype Dynamic (SpiderTimeline x) a = SpiderDynamic { unSpiderDynamic :: Dynamic x (Identity a) } -- deriving (Functor, Applicative, Monad)
2514− newtype Incremental (SpiderTimeline x) p = SpiderIncremental { unSpiderIncremental :: Dynamic x p }
2515− type PullM (SpiderTimeline x) = SpiderPullM x
2516− type PushM (SpiderTimeline x) = SpiderPushM x
2517− {-# INLINABLE never #-}
2518− never = SpiderEvent eventNever
2519− {-# INLINABLE constant #-}
2520− constant = SpiderBehavior . behaviorConst
2521− {-# INLINE push #-}
2522− push f = SpiderEvent . push (coerce f) . unSpiderEvent
2523− {-# INLINE pushCheap #-}
2524− pushCheap f = SpiderEvent . pushCheap (coerce f) . unSpiderEvent
2525− {-# INLINABLE pull #-}
2526− pull = SpiderBehavior . pull . coerce
2527− {-# INLINABLE mergeG #-}
2529− :: forall (k :: k2 -> *) q (v :: k2 -> *). GCompare k
2530− => (forall a. q a -> R.Event (SpiderTimeline x) (v a))
2532− -> R.Event (SpiderTimeline x) (DMap k v)
2533− mergeG nt = SpiderEvent . mergeG (unSpiderEvent #. nt) . dynamicConst
2534− {-# INLINABLE fan #-}
2535− fan e = R.EventSelector $ SpiderEvent . select (fan (unSpiderEvent e))
2536− {-# INLINABLE switch #-}
2537− switch = SpiderEvent . switch . (coerce :: Behavior x (R.Event (SpiderTimeline x) a) -> Behavior x (Event x a)) . unSpiderBehavior
2538− {-# INLINABLE coincidence #-}
2539− coincidence = SpiderEvent . coincidence . (coerce :: Event x (R.Event (SpiderTimeline x) a) -> Event x (Event x a)) . unSpiderEvent
2540− {-# INLINABLE current #-}
2541− current = SpiderBehavior . dynamicCurrent . unSpiderDynamic
2542− {-# INLINABLE updated #-}
2543− updated = coerce $ SpiderEvent . dynamicUpdated . unSpiderDynamic
2544− {-# INLINABLE unsafeBuildDynamic #-}
2545− unsafeBuildDynamic readV0 v' = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (coerce readV0) $ coerce $ unSpiderEvent v'
2546− {-# INLINABLE unsafeBuildIncremental #-}
2547− unsafeBuildIncremental readV0 dv = SpiderIncremental $ dynamicDyn $ unsafeBuildDynamic (coerce readV0) $ unSpiderEvent dv
2548− {-# INLINABLE mergeIncrementalG #-}
2549− mergeIncrementalG nt = SpiderEvent #. mergeG (coerce #. nt) .# unSpiderIncremental
2550− {-# INLINABLE mergeIncrementalWithMoveG #-}
2551− mergeIncrementalWithMoveG nt = SpiderEvent #. mergeWithMove (coerce #. nt) .# unSpiderIncremental
2552− {-# INLINABLE currentIncremental #-}
2553− currentIncremental = SpiderBehavior . dynamicCurrent . unSpiderIncremental
2554− {-# INLINABLE updatedIncremental #-}
2555− updatedIncremental = SpiderEvent . dynamicUpdated . unSpiderIncremental
2556− {-# INLINABLE incrementalToDynamic #-}
2557− incrementalToDynamic (SpiderIncremental i) = SpiderDynamic $ dynamicDynIdentity $ unsafeBuildDynamic (readBehaviorUntracked $ dynamicCurrent i) $ flip push (dynamicUpdated i) $ \p -> do
2558− c <- readBehaviorUntracked $ dynamicCurrent i
2559− return $ Identity <$> apply p c --TODO: Avoid the redundant 'apply'
2560− eventCoercion Coercion = Coercion
2561− behaviorCoercion Coercion = Coercion
2562− dynamicCoercion = unsafeCoerce --TODO: How can we avoid this unsafeCoerce? This is safe only because we know how Identity works as a Patch instance
2563− {-# INLINABLE mergeIntIncremental #-}
2564− mergeIntIncremental = SpiderEvent . mergeInt . (unsafeCoerce :: Dynamic x (PatchIntMap (R.Event (SpiderTimeline x) a)) -> Dynamic x (PatchIntMap (Event x a))) . unSpiderIncremental
2565− {-# INLINABLE fanInt #-}
2566− fanInt e = R.EventSelectorInt $ SpiderEvent . selectInt (fanInt (unSpiderEvent e))
2568−data RootTrigger x a = forall k. GCompare k => RootTrigger (WeakBag (Subscriber x a), IORef (DMap k Identity), k a)
2570−data SpiderEventHandle x a = SpiderEventHandle
2571− { spiderEventHandleSubscription :: EventSubscription x
2572− , spiderEventHandleValue :: IORef (Maybe a)
2575−instance MonadRef (EventM x) where
2576− type Ref (EventM x) = Ref IO
2577− {-# INLINABLE newRef #-}
2578− {-# INLINABLE readRef #-}
2579− {-# INLINABLE writeRef #-}
2580− newRef = liftIO . newRef
2581− readRef = liftIO . readRef
2582− writeRef r a = liftIO $ writeRef r a
2584−instance MonadAtomicRef (EventM x) where
2585− {-# INLINABLE atomicModifyRef #-}
2586− atomicModifyRef r f = liftIO $ atomicModifyRef r f
2588−-- | The monad for actions that manipulate a Spider timeline identified by @x@
2589−newtype SpiderHost (x :: Type) a = SpiderHost { unSpiderHost :: IO a } deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2591−instance Monad (SpiderHost x) where
2592− {-# INLINABLE (>>=) #-}
2593− SpiderHost x >>= f = SpiderHost $ x >>= unSpiderHost . f
2594− {-# INLINABLE (>>) #-}
2595− SpiderHost x >> SpiderHost y = SpiderHost $ x >> y
2596− {-# INLINABLE return #-}
2597− return x = SpiderHost $ return x
2598− {-# INLINABLE fail #-}
2599− fail s = SpiderHost $ fail s
2601−-- | Run an action affecting the global Spider timeline; this will be guarded by
2602−-- a mutex for that timeline
2603−runSpiderHost :: SpiderHost Global a -> IO a
2604−runSpiderHost (SpiderHost a) = a
2606−-- | Run an action affecting a given Spider timeline; this will be guarded by a
2607−-- mutex for that timeline
2608−runSpiderHostForTimeline :: SpiderHost x a -> SpiderTimelineEnv x -> IO a
2609−runSpiderHostForTimeline (SpiderHost a) _ = a
2611−newtype SpiderHostFrame (x :: Type) a = SpiderHostFrame { runSpiderHostFrame :: EventM x a }
2612− deriving (Functor, Applicative, MonadFix, MonadIO, MonadException, MonadAsyncException)
2614−instance Monad (SpiderHostFrame x) where
2615− {-# INLINABLE (>>=) #-}
2616− SpiderHostFrame x >>= f = SpiderHostFrame $ x >>= runSpiderHostFrame . f
2617− {-# INLINABLE (>>) #-}
2618− SpiderHostFrame x >> SpiderHostFrame y = SpiderHostFrame $ x >> y
2619− {-# INLINABLE return #-}
2620− return x = SpiderHostFrame $ return x
2621− {-# INLINABLE fail #-}
2622− fail s = SpiderHostFrame $ fail s
2624−instance NotReady (SpiderTimeline x) (SpiderHostFrame x) where
2625− notReadyUntil _ = pure ()
2628−newEventWithTriggerIO :: (RootTrigger x a -> IO (IO ())) -> IO (Event x a)
2629−newEventWithTriggerIO f = do
2630− es <- newFanEventWithTriggerIO $ \Refl -> f
2631− return $ select es Refl
2633−newFanEventWithTriggerIO :: GCompare k => (forall a. k a -> RootTrigger x a -> IO (IO ())) -> IO (EventSelector x k)
2634−newFanEventWithTriggerIO f = do
2635− occRef <- newIORef DMap.empty
2636− subscribedRef <- newIORef DMap.empty
2638− { rootOccurrence = occRef
2639− , rootSubscribed = subscribedRef
2642− return $ EventSelector $ \k -> eventRoot k r
2644−newtype ReadPhase x a = ReadPhase (ResultM x a) deriving (Functor, Applicative, Monad, MonadFix)
2646−instance MonadRef (SpiderHost x) where
2647− type Ref (SpiderHost x) = Ref IO
2648− newRef = SpiderHost . newRef
2649− readRef = SpiderHost . readRef
2650− writeRef r = SpiderHost . writeRef r
2652−instance MonadAtomicRef (SpiderHost x) where
2653− atomicModifyRef r = SpiderHost . atomicModifyRef r
2655−instance MonadRef (SpiderHostFrame x) where
2656− type Ref (SpiderHostFrame x) = Ref IO
2657− newRef = SpiderHostFrame . newRef
2658− readRef = SpiderHostFrame . readRef
2659− writeRef r = SpiderHostFrame . writeRef r
2661−instance MonadAtomicRef (SpiderHostFrame x) where
2662− atomicModifyRef r = SpiderHostFrame . atomicModifyRef r
2664−instance PrimMonad (SpiderHostFrame x) where
2665− type PrimState (SpiderHostFrame x) = PrimState IO
2666− primitive = SpiderHostFrame . EventM . primitive