Skip to content

HORIZON HASKELL Docs lts/ghc-10.0.xc7d136e2026-10-12Search names, modules, packages, or :: a typeCtrl K

GHC 10.0.0.20260917 · lts/ghc-10.0.x · c7d136e · 2026-10-12

Modulelifted-base-0.2.3.12

Control.Concurrent.MVar.Lifted

1 type
17 values

Packagelifted-base-0.2.3.12
Exports18
LicenceBSD-3-Clause
SourceMVar.hs

valueisEmptyMVar :: MonadBase IO m => MVar a -> m Bool

valuemkWeakMVar :: MonadBaseControl IO m => MVar a -> m () -> m (Weak (MVar a))

valuemodifyMVar :: MonadBaseControl IO m => MVar a -> (a -> m (a, b)) -> m b

valuemodifyMVarMasked

:: MonadBaseControl IO m
=> MVar a
-> a -> m (a, b)
-> m b

valuemodifyMVarMasked_ :: MonadBaseControl IO m => MVar a -> (a -> m a) -> m ()

valuemodifyMVar_ :: MonadBaseControl IO m => MVar a -> (a -> m a) -> m ()

valuenewEmptyMVar :: MonadBase IO m => m (MVar a)

valuenewMVar :: MonadBase IO m => a -> m (MVar a)

valueputMVar :: MonadBase IO m => MVar a -> a -> m ()

valuereadMVar :: MonadBase IO m => MVar a -> m a

valueswapMVar :: MonadBase IO m => MVar a -> a -> m a

valuetakeMVar :: MonadBase IO m => MVar a -> m a

valuetryPutMVar :: MonadBase IO m => MVar a -> a -> m Bool

valuetryReadMVar :: MonadBase IO m => MVar a -> m (Maybe a)

valuetryTakeMVar :: MonadBase IO m => MVar a -> m (Maybe a)

valuewithMVar :: MonadBaseControl IO m => MVar a -> (a -> m b) -> m b

valuewithMVarMasked :: MonadBaseControl IO m => MVar a -> (a -> m b) -> m b

datadata MVar a

An MVar (pronounced "em-var") is a synchronising variable, used for communication between concurrent threads. It can be thought of as a box, which may be empty or full.

Instances1Eq

Eq (MVar a)Defined in ghc-internal-10.0.0 · GHC.Internal.MVar
Compares the underlying pointers.