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| author | Edward Z. Yang <ezyang@cs.stanford.edu> | 2015-01-27 16:20:54 -0800 |
|---|---|---|
| committer | Edward Z. Yang <ezyang@cs.stanford.edu> | 2015-01-28 13:54:58 -0800 |
| commit | 07ee96faac4996cde0ab82789eec0b70d1a35af0 (patch) | |
| tree | 1a36efc948d7634a95734d0c527286a5070f4c76 /compiler/utils/IOEnv.hs | |
| parent | 276da7929c187f007c198a38e88bdad91866e500 (diff) | |
| download | haskell-07ee96faac4996cde0ab82789eec0b70d1a35af0.tar.gz | |
Use strict atomicModifyIORef' (added in GHC 7.6).
Summary: Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Test Plan: validate
Reviewers: austin, hvr
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D635
Diffstat (limited to 'compiler/utils/IOEnv.hs')
| -rw-r--r-- | compiler/utils/IOEnv.hs | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/compiler/utils/IOEnv.hs b/compiler/utils/IOEnv.hs index 46f6e467c1..fd98bad213 100644 --- a/compiler/utils/IOEnv.hs +++ b/compiler/utils/IOEnv.hs @@ -38,7 +38,7 @@ import Module import Panic import Data.IORef ( IORef, newIORef, readIORef, writeIORef, modifyIORef, - atomicModifyIORef ) + atomicModifyIORef, atomicModifyIORef' ) import Data.Typeable import System.IO.Unsafe ( unsafeInterleaveIO ) import System.IO ( fixIO ) @@ -194,10 +194,7 @@ atomicUpdMutVar var upd = liftIO (atomicModifyIORef var upd) -- | Strict variant of 'atomicUpdMutVar'. atomicUpdMutVar' :: IORef a -> (a -> (a, b)) -> IOEnv env b -atomicUpdMutVar' var upd = do - r <- atomicUpdMutVar var upd - _ <- liftIO . evaluate =<< readMutVar var - return r +atomicUpdMutVar' var upd = liftIO (atomicModifyIORef' var upd) ---------------------------------------------------------------------- -- Accessing the environment |