Simulation.Aivika.PriorityQueue.EventQueue

Tested with: GHC 8.0.1

An imperative heap-based priority queue to implement the event queue.

Documentation

data PriorityQueue a

The PriorityQueue type represents an imperative heap-based priority queue.

type Priority = Int

The priority value (greater is higher).

queueNull :: PriorityQueue a -> IO Bool

Test whether the priority queue is empty.

queueCount :: PriorityQueue a -> IO Int

Return the number of elements in the priority queue.

newQueue :: IO (PriorityQueue a)

Create a new priority queue.

enqueue :: PriorityQueue a -> Double -> Priority -> a -> IO ()

Enqueue a new element with the specified priority.

dequeue :: PriorityQueue a -> IO ()

Dequeue the element with the minimal priority.

queueFront :: PriorityQueue a -> IO (Double, Priority, a)

Return the element with the minimal priority.