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| author | Ben Sima <ben@bsima.me> | 2019-10-27 09:48:52 -0700 |
|---|---|---|
| committer | Ben Sima <ben@bsima.me> | 2019-10-27 12:14:40 -0700 |
| commit | c790672cc244ac4caba1bda3572829a6c6862891 (patch) | |
| tree | 2706bb8044f7b14840c5f90f215b79b433e81045 /com/simatime/sema.hs | |
| parent | 44df4ba39f65c3afd84bee6b03f47d9b061e9038 (diff) | |
move everything to namespace directories
Diffstat (limited to 'com/simatime/sema.hs')
| -rw-r--r-- | com/simatime/sema.hs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/com/simatime/sema.hs b/com/simatime/sema.hs new file mode 100644 index 0000000..f0f75da --- /dev/null +++ b/com/simatime/sema.hs @@ -0,0 +1,12 @@ +module Com.Simatime.Sema + ( mapPool + ) +where + +import qualified Control.Concurrent.MSem as Sem + +-- | Simaphore-based throttled 'mapConcurrently'. +mapPool :: Traversable t => Int -> (a -> IO b) -> t a -> IO (t b) +mapPool n f xs = do + sima <- Sem.new n + mapConcurrently (Sem.with sima . f) xs |