hercules-ci-agent-0.9.10: Runs Continuous Integration tasks on your machines
Safe HaskellSafe-Inferred
LanguageHaskell2010

Hercules.Agent.STM

Description

STM functions in MonadIO and custom functions like modifyTVarIO.

Why not lifted-stm of stm-lifted package? - neither is in stackage - only a few functions needed

Synopsis

Documentation

atomically :: MonadIO m => STM a -> m a Source #

readTVarIO :: MonadIO m => TVar a -> m a Source #

newTVarIO :: MonadIO m => a -> m (TVar a) Source #

modifyTVarIO :: MonadIO m => TVar a -> (a -> (a, b)) -> m b Source #

Drop-in replacement for atomicModifyIORef

data TVar a #

Shared memory locations that support atomic memory transactions.

Instances

Instances details
Eq (TVar a)

Since: base-4.8.0.0

Instance details

Defined in GHC.Conc.Sync

Methods

(==) :: TVar a -> TVar a -> Bool #

(/=) :: TVar a -> TVar a -> Bool #

data STM a #

A monad supporting atomic memory transactions.

Instances

Instances details
Alternative STM

Since: base-4.8.0.0

Instance details

Defined in GHC.Conc.Sync

Methods

empty :: STM a #

(<|>) :: STM a -> STM a -> STM a #

some :: STM a -> STM [a] #

many :: STM a -> STM [a] #

Applicative STM

Since: base-4.8.0.0

Instance details

Defined in GHC.Conc.Sync

Methods

pure :: a -> STM a #

(<*>) :: STM (a -> b) -> STM a -> STM b #

liftA2 :: (a -> b -> c) -> STM a -> STM b -> STM c #

(*>) :: STM a -> STM b -> STM b #

(<*) :: STM a -> STM b -> STM a #

Functor STM

Since: base-4.3.0.0

Instance details

Defined in GHC.Conc.Sync

Methods

fmap :: (a -> b) -> STM a -> STM b #

(<$) :: a -> STM b -> STM a #

Monad STM

Since: base-4.3.0.0

Instance details

Defined in GHC.Conc.Sync

Methods

(>>=) :: STM a -> (a -> STM b) -> STM b #

(>>) :: STM a -> STM b -> STM b #

return :: a -> STM a #

MonadPlus STM

Since: base-4.3.0.0

Instance details

Defined in GHC.Conc.Sync

Methods

mzero :: STM a #

mplus :: STM a -> STM a -> STM a #

MonadCatch STM 
Instance details

Defined in Control.Monad.Catch

Methods

catch :: Exception e => STM a -> (e -> STM a) -> STM a #

MonadThrow STM 
Instance details

Defined in Control.Monad.Catch

Methods

throwM :: Exception e => e -> STM a #

MonadBaseControl STM STM 
Instance details

Defined in Control.Monad.Trans.Control

Associated Types

type StM STM a #

Methods

liftBaseWith :: (RunInBase STM STM -> STM a) -> STM a #

restoreM :: StM STM a -> STM a #

MArray TArray e STM 
Instance details

Defined in Control.Concurrent.STM.TArray

Methods

getBounds :: Ix i => TArray i e -> STM (i, i) #

getNumElements :: Ix i => TArray i e -> STM Int

newArray :: Ix i => (i, i) -> e -> STM (TArray i e) #

newArray_ :: Ix i => (i, i) -> STM (TArray i e) #

unsafeNewArray_ :: Ix i => (i, i) -> STM (TArray i e)

unsafeRead :: Ix i => TArray i e -> Int -> STM e

unsafeWrite :: Ix i => TArray i e -> Int -> e -> STM ()

RandomGen g => FrozenGen (TGen g) STM

Since: random-1.2.1

Instance details

Defined in System.Random.Stateful

Associated Types

type MutableGen (TGen g) STM = (g :: Type) #

Methods

freezeGen :: MutableGen (TGen g) STM -> STM (TGen g) #

thawGen :: TGen g -> STM (MutableGen (TGen g) STM) #

RandomGen g => StatefulGen (TGenM g) STM

Since: random-1.2.1

Instance details

Defined in System.Random.Stateful

RandomGen r => RandomGenM (TGenM r) r STM 
Instance details

Defined in System.Random.Stateful

Methods

applyRandomGenM :: (r -> (a, r)) -> TGenM r -> STM a #

type StM STM a 
Instance details

Defined in Control.Monad.Trans.Control

type StM STM a = a
type MutableGen (TGen g) STM 
Instance details

Defined in System.Random.Stateful

type MutableGen (TGen g) STM = TGenM g

writeTVar :: TVar a -> a -> STM () #

Write the supplied value into a TVar.

readTVar :: TVar a -> STM a #

Return the current value stored in a TVar.

data TChan a #

TChan is an abstract type representing an unbounded FIFO channel.

Instances

Instances details
Eq (TChan a) 
Instance details

Defined in Control.Concurrent.STM.TChan

Methods

(==) :: TChan a -> TChan a -> Bool #

(/=) :: TChan a -> TChan a -> Bool #

data TBQueue a #

TBQueue is an abstract type representing a bounded FIFO channel.

Since: stm-2.4

Instances

Instances details
Eq (TBQueue a) 
Instance details

Defined in Control.Concurrent.STM.TBQueue

Methods

(==) :: TBQueue a -> TBQueue a -> Bool #

(/=) :: TBQueue a -> TBQueue a -> Bool #