readIORef

readIORef :: IORef a -> IO a
base Data.IORef GHC.IORef, ihaskell IHaskellPrelude, ghc-internal GHC.Internal.Data.IORef GHC.Internal.IORef, rebase Rebase.Prelude
Read the value of an IORef. Beware that the CPU executing a thread can reorder reads or writes to independent locations. See Data.IORef#memmodel for more details.
readIORef :: MonadIO m => IORef a -> m a
unliftio UnliftIO.IORef
Lifted readIORef.
readIORef :: MonadBase IO m => IORef a -> m a
lifted-base Data.IORef.Lifted
Generalized version of readIORef.
readIORef :: MonadIO m => IORef a -> m a
relude Relude.Lifted.IORef
Lifted version of readIORef. 
>>> ref <- newIORef 42

>>> readIORef ref
42
readIORef :: IORef a -> IO a
base-prelude BasePrelude
Read the value of an IORef
readIORef :: MonadIO m => IORef a -> m a
universum Universum.Lifted.IORef
Lifted version of readIORef.
readIORef :: Unbox a => IORef a -> IO a
streamly-core Streamly.Internal.Data.MutArray
Read a value from an IORef. Pre-release
readIORef :: MonadConc m => IORef m a -> m a
concurrency Control.Concurrent.Classy.IORef Control.Monad.Conc.Class
Read the current value stored in a reference. 
readIORef ioref = readForCAS ioref >>= peekTicket
readIORef :: MonadDejaFu n => ModelIORef n a -> ThreadId -> n a
dejafu Test.DejaFu.Conc.Internal.Memory
Read from a IORef, returning a newer thread-local non-committed write if there is one.
ReadIORef :: IORefId -> ThreadAction
dejafu Test.DejaFu.Conc Test.DejaFu.Types
Read from a IORef.
readIORefGlobal :: MonadDejaFu n => ModelIORef n a -> n a
dejafu Test.DejaFu.Conc.Internal.Memory
Read the global state of a IORef.
readIORefPrim :: MonadDejaFu n => ModelIORef n a -> ThreadId -> n (a, Integer)
dejafu Test.DejaFu.Conc.Internal.Memory
Read the local state of a IORef.
readIORefU :: Prim a => IORefU a -> IO a
unboxed-ref Data.IORef.Unboxed
Read the value of an IORefU
readIORef' :: IORef' a -> IO a
strict-mutable-base Data.IORef.Strict
readIORef for IORef'.
ReadIORefCas :: IORefId -> ThreadAction
dejafu Test.DejaFu.Conc Test.DejaFu.Types
Read from a IORef for a future compare-and-swap.
WillReadIORef :: IORefId -> Lookahead
dejafu Test.DejaFu.Conc Test.DejaFu.Types
Will read from a IORef.
WillReadIORefCas :: IORefId -> Lookahead
dejafu Test.DejaFu.Conc Test.DejaFu.Types
Will read from a IORef for a future compare-and-swap.
AReadIORef :: ModelIORef n a -> (a -> Action n) -> Action n
dejafu Test.DejaFu.Conc.Internal.Common
AReadIORefCas :: ModelIORef n a -> (ModelTicket a -> Action n) -> Action n
dejafu Test.DejaFu.Conc.Internal.Common
atomicReadIORef :: IORef a -> IO a
vcr Imports