Safe Haskell	Safe-Inferred
Language	Haskell2010

Control.Concurrent.Class.MonadSTM.Strict.TMVar

Contents

StrictTMVar
MonadLabelledSTM
MonadTraceSTM

Description

This module corresponds to TMVar in "stm" package

Synopsis

data StrictTMVar m a
type LazyTMVar m = TMVar m
toLazyTMVar :: StrictTMVar m a -> LazyTMVar m a
fromLazyTMVar :: LazyTMVar m a -> StrictTMVar m a
castStrictTMVar :: LazyTMVar m ~ LazyTMVar n => StrictTMVar m a -> StrictTMVar n a
newTMVar :: MonadSTM m => a -> STM m (StrictTMVar m a)
newEmptyTMVar :: MonadSTM m => STM m (StrictTMVar m a)
newTMVarIO :: MonadSTM m => a -> m (StrictTMVar m a)
newEmptyTMVarIO :: MonadSTM m => m (StrictTMVar m a)
takeTMVar :: MonadSTM m => StrictTMVar m a -> STM m a
tryTakeTMVar :: MonadSTM m => StrictTMVar m a -> STM m (Maybe a)
putTMVar :: MonadSTM m => StrictTMVar m a -> a -> STM m ()
tryPutTMVar :: MonadSTM m => StrictTMVar m a -> a -> STM m Bool
readTMVar :: MonadSTM m => StrictTMVar m a -> STM m a
tryReadTMVar :: MonadSTM m => StrictTMVar m a -> STM m (Maybe a)
swapTMVar :: MonadSTM m => StrictTMVar m a -> a -> STM m a
isEmptyTMVar :: MonadSTM m => StrictTMVar m a -> STM m Bool
labelTMVar :: MonadLabelledSTM m => StrictTMVar m a -> String -> STM m ()
labelTMVarIO :: MonadLabelledSTM m => StrictTMVar m a -> String -> m ()
traceTMVar :: MonadTraceSTM m => proxy m -> StrictTMVar m a -> (Maybe (Maybe a) -> Maybe a -> InspectMonad m TraceValue) -> STM m ()
traceTMVarIO :: MonadTraceSTM m => StrictTMVar m a -> (Maybe (Maybe a) -> Maybe a -> InspectMonad m TraceValue) -> m ()

StrictTMVar

data StrictTMVar m a Source #

TMVar that keeps its value in WHNF at all times

Does not support an invariant: if the invariant would not be satisfied, we would not be able to put a value into an empty TMVar, which would lead to very hard to debug bugs where code is blocked indefinitely.

type LazyTMVar m = TMVar m Source #

toLazyTMVar :: StrictTMVar m a -> LazyTMVar m a Source #

fromLazyTMVar :: LazyTMVar m a -> StrictTMVar m a Source #

castStrictTMVar :: LazyTMVar m ~ LazyTMVar n => StrictTMVar m a -> StrictTMVar n a Source #

newTMVar :: MonadSTM m => a -> STM m (StrictTMVar m a) Source #

newEmptyTMVar :: MonadSTM m => STM m (StrictTMVar m a) Source #

newTMVarIO :: MonadSTM m => a -> m (StrictTMVar m a) Source #

newEmptyTMVarIO :: MonadSTM m => m (StrictTMVar m a) Source #

takeTMVar :: MonadSTM m => StrictTMVar m a -> STM m a Source #

tryTakeTMVar :: MonadSTM m => StrictTMVar m a -> STM m (Maybe a) Source #

putTMVar :: MonadSTM m => StrictTMVar m a -> a -> STM m () Source #

tryPutTMVar :: MonadSTM m => StrictTMVar m a -> a -> STM m Bool Source #

readTMVar :: MonadSTM m => StrictTMVar m a -> STM m a Source #

tryReadTMVar :: MonadSTM m => StrictTMVar m a -> STM m (Maybe a) Source #

swapTMVar :: MonadSTM m => StrictTMVar m a -> a -> STM m a Source #

isEmptyTMVar :: MonadSTM m => StrictTMVar m a -> STM m Bool Source #

MonadLabelledSTM

labelTMVar :: MonadLabelledSTM m => StrictTMVar m a -> String -> STM m () Source #

labelTMVarIO :: MonadLabelledSTM m => StrictTMVar m a -> String -> m () Source #

MonadTraceSTM

traceTMVar :: MonadTraceSTM m => proxy m -> StrictTMVar m a -> (Maybe (Maybe a) -> Maybe a -> InspectMonad m TraceValue) -> STM m () Source #

traceTMVarIO :: MonadTraceSTM m => StrictTMVar m a -> (Maybe (Maybe a) -> Maybe a -> InspectMonad m TraceValue) -> m () Source #