| Copyright | Bas van Dijk |
|---|---|
| License | BSD-style |
| Maintainer | Bas van Dijk <v.dijk.bas@gmail.com> |
| Stability | experimental |
| Safe Haskell | Safe |
| Language | Haskell98 |
Control.Concurrent.MVar.Lifted
Description
This is a wrapped version of Control.Concurrent.MVar with types generalized
from IO to all monads in either MonadBase or MonadBaseControl.
- data MVar a :: * -> *
- newEmptyMVar :: MonadBase IO m => m (MVar a)
- newMVar :: MonadBase IO m => a -> m (MVar a)
- takeMVar :: MonadBase IO m => MVar a -> m a
- putMVar :: MonadBase IO m => MVar a -> a -> m ()
- readMVar :: MonadBase IO m => MVar a -> m a
- swapMVar :: MonadBase IO m => MVar a -> a -> m a
- tryTakeMVar :: MonadBase IO m => MVar a -> m (Maybe a)
- tryPutMVar :: MonadBase IO m => MVar a -> a -> m Bool
- isEmptyMVar :: MonadBase IO m => MVar a -> m Bool
- withMVar :: MonadBaseControl IO m => MVar a -> (a -> m b) -> m b
- modifyMVar_ :: MonadBaseControl IO m => MVar a -> (a -> m a) -> m ()
- modifyMVar :: MonadBaseControl IO m => MVar a -> (a -> m (a, b)) -> m b
- modifyMVarMasked_ :: MonadBaseControl IO m => MVar a -> (a -> m a) -> m ()
- modifyMVarMasked :: MonadBaseControl IO m => MVar a -> (a -> m (a, b)) -> m b
- mkWeakMVar :: MonadBaseControl IO m => MVar a -> m () -> m (Weak (MVar a))
- withMVarMasked :: MonadBaseControl IO m => MVar a -> (a -> m b) -> m b
- tryReadMVar :: MonadBase IO m => MVar a -> m (Maybe a)
Documentation
An MVar (pronounced "em-var") is a synchronising variable, used
for communication between concurrent threads. It can be thought of
as a a box, which may be empty or full.
newEmptyMVar :: MonadBase IO m => m (MVar a) Source #
Generalized version of newEmptyMVar.
tryTakeMVar :: MonadBase IO m => MVar a -> m (Maybe a) Source #
Generalized version of tryTakeMVar.
tryPutMVar :: MonadBase IO m => MVar a -> a -> m Bool Source #
Generalized version of tryPutMVar.
isEmptyMVar :: MonadBase IO m => MVar a -> m Bool Source #
Generalized version of isEmptyMVar.
withMVar :: MonadBaseControl IO m => MVar a -> (a -> m b) -> m b Source #
Generalized version of withMVar.
modifyMVar_ :: MonadBaseControl IO m => MVar a -> (a -> m a) -> m () Source #
Generalized version of modifyMVar_.
modifyMVar :: MonadBaseControl IO m => MVar a -> (a -> m (a, b)) -> m b Source #
Generalized version of modifyMVar.
modifyMVarMasked_ :: MonadBaseControl IO m => MVar a -> (a -> m a) -> m () Source #
Generalized version of modifyMVarMasked_.
modifyMVarMasked :: MonadBaseControl IO m => MVar a -> (a -> m (a, b)) -> m b Source #
Generalized version of modifyMVarMasked.
mkWeakMVar :: MonadBaseControl IO m => MVar a -> m () -> m (Weak (MVar a)) Source #
Generalized version of mkWeakMVar.
Note any monadic side effects in m of the "finalizer" computation are
discarded.
withMVarMasked :: MonadBaseControl IO m => MVar a -> (a -> m b) -> m b Source #
Generalized version of withMVarMasked.
tryReadMVar :: MonadBase IO m => MVar a -> m (Maybe a) Source #
Generalized version of tryReadMVar.