From f4b8c0df041b063c0b47d2ec6c818a9c202fd833 Mon Sep 17 00:00:00 2001 From: Ben Sima Date: Wed, 15 Apr 2020 09:54:10 -0700 Subject: Re-namespacing Moving away from the DNS-driven namespacing toward more condensed names, mostly because I don't like typing so much. --- Control/Concurrent/Sema.hs | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 Control/Concurrent/Sema.hs (limited to 'Control/Concurrent') diff --git a/Control/Concurrent/Sema.hs b/Control/Concurrent/Sema.hs new file mode 100644 index 0000000..e804cc3 --- /dev/null +++ b/Control/Concurrent/Sema.hs @@ -0,0 +1,12 @@ +module Control.Concurrent.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 -- cgit v1.2.3