Control.Concurrent.Stack

Provides a synchronized stack for use in the IO monad

See also Control.Concurrent.STM.Stack

Documentation

data Stack a

Synchronized stack data type

stackNew :: IO (Stack a)

Create new empty Stack

stackPush :: Stack a -> a -> IO ()

Push item onto Stack

stackPeek :: Stack a -> IO a

Pop most recently added item without removing from the Stack

Blocks if stack is empty

stackTryPeek :: Stack a -> IO (Maybe a)

Pop most recently added item without removing from the Stack

stackPop :: Stack a -> IO a

Pop most recently added item from Stack

Blocks if stack is empty

stackTryPop :: Stack a -> IO (Maybe a)

Pop most recently added item from Stack

stackIsEmpty :: Stack a -> IO Bool

Test if stack is empty

stackSize :: Stack a -> IO Natural

Compute number of elements contained in the Stack