newTVar -package:ghc-internal

newTVar :: a -> STM (TVar a)

base GHC.Conc GHC.Conc.Sync, stm Control.Concurrent.STM.TVar, unliftio UnliftIO.STM, relude Relude.Lifted.Concurrent, base-prelude BasePrelude, universum Universum.Lifted.Concurrent, effectful Effectful.Concurrent.STM, rebase Rebase.Prelude

Create a new TVar holding a value supplied

newTVar :: MonadSTM stm => a -> stm (TVar stm a)

concurrency Control.Concurrent.Classy.STM.TVar Control.Monad.STM.Class

Create a new TVar containing the given value.

newTVar = newTVarN ""

newTVarIO :: a -> IO (TVar a)

base GHC.Conc GHC.Conc.Sync, stm Control.Concurrent.STM.TVar, base-prelude BasePrelude, pipes-concurrency Pipes.Concurrent, rebase Rebase.Prelude

IO version of newTVar. This is useful for creating top-level TVars using unsafePerformIO, because using atomically inside unsafePerformIO isn't possible.

newTVar# :: a_levpoly -> State# s -> (# State# s, TVar# s a_levpoly #)

ghc-prim GHC.PrimopWrappers

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

unliftio UnliftIO.STM

Lifted version of newTVarIO

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

relude Relude.Lifted.Concurrent, universum Universum.Lifted.Concurrent

Lifted to MonadIO version of newTVarIO.

newTVarN :: MonadSTM stm => String -> a -> stm (TVar stm a)

concurrency Control.Concurrent.Classy.STM.TVar Control.Monad.STM.Class

Create a new TVar containing the given value, but it is given a name which may be used to present more useful debugging information. If an empty name is given, a counter starting from 0 is used. If names conflict, successive TVars with the same name are given a numeric suffix, counting up from 1.

newTVarN _ = newTVar

newTVarConc :: MonadConc m => a -> m (TVar (STM m) a)

concurrency Control.Monad.Conc.Class

Create a TVar. This may be implemented differently for speed.

newTVarConc = atomically . newTVar

NewTVarOp :: PrimOp

ghc GHC.Builtin.PrimOps, ghc-lib-parser GHC.Builtin.PrimOps

hdNewTVar :: FastString

ghc GHC.StgToJS.Symbols