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[hls-graph] Optimise waitConcurrently #2805

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merged 2 commits into from
Mar 29, 2022
Merged

[hls-graph] Optimise waitConcurrently #2805

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d58f281
work on the sync computations first
pepeiborra Mar 22, 2022
4c03661
Merge branch 'master' into hls-graph-sync-async
mergify[bot] Mar 29, 2022
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14 changes: 9 additions & 5 deletions hls-graph/src/Development/IDE/Graph/Internal/Database.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -329,10 +329,14 @@ waitConcurrently_ [] = pure ()
waitConcurrently_ [one] = liftIO $ justWait one
waitConcurrently_ many = do
ref <- AIO ask
-- mask to make sure we keep track of all the asyncs
waits <- liftIO $ uninterruptibleMask $ \unmask -> do
-- spawn the async computations.
-- mask to make sure we keep track of all the asyncs.
(asyncs, syncs) <- liftIO $ uninterruptibleMask $ \unmask -> do
waits <- liftIO $ traverse (waitOrSpawn . fmapWait unmask) many
let asyncs = rights waits
let (syncs, asyncs) = partitionEithers waits
liftIO $ atomicModifyIORef'_ ref (asyncs ++)
return waits
liftIO $ traverse_ (either id wait) waits
return (asyncs, syncs)
-- work on the sync computations
liftIO $ sequence_ syncs
-- wait for the async computations before returning
liftIO $ traverse_ wait asyncs