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1. tvarsRead :: ThreadAction -> Set TVarId

   dejafu	Test.DejaFu.Internal

   Get the TVars a transaction read from.

2. tvarsWritten :: ThreadAction -> Set TVarId

   dejafu	Test.DejaFu.Internal

   Get the TVars a transaction wrote to (or would have, if it didn't retry).

3. tVarPrimTyConKey :: Unique

   breakpoint	Debug.Breakpoint.GhcFacade

   No documentation available.

4. newTVar :: a -> STM (TVar a)

   base	GHC.Conc

   Create a new TVar holding a value supplied

5. newTVarIO :: a -> IO (TVar a)

   base	GHC.Conc

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

6. readTVar :: TVar a -> STM a

   base	GHC.Conc

   Return the current value stored in a TVar.

7. readTVarIO :: TVar a -> IO a

   base	GHC.Conc

   Return the current value stored in a TVar. This is equivalent to

   readTVarIO = atomically . readTVar
   

   but works much faster, because it doesn't perform a complete transaction, it just reads the current value of the TVar.

8. writeTVar :: TVar a -> a -> STM ()

   base	GHC.Conc

   Write the supplied value into a TVar.

9. newTVar :: a -> STM (TVar a)

   base	GHC.Conc.Sync

   Create a new TVar holding a value supplied

10. newTVarIO :: a -> IO (TVar a)

    base	GHC.Conc.Sync

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

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