Control.Concurrent.STM.Stack

Provides a synchronized stack for use in the STM monad

See also Control.Concurrent.Stack

Documentation

data Stack a

Synchronized stack data type

stackNew :: STM (Stack a)

Create new Stack

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

Push item onto Stack

stackPeek :: Stack a -> STM a

Pop most recently added item without removing from the Stack

Automatically retries if stack is empty

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

Pop most recently added item without removing from the Stack

stackPop :: Stack a -> STM a

Pop most recently added item from Stack

Automatically retries if stack is empty

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

Pop most recently added item from Stack

stackIsEmpty :: Stack a -> STM Bool

Test if stack is empty

stackSize :: Stack a -> STM Natural

Compute number of elements contained in the Stack