Safe Haskell	Safe-Infered

Ganeti.HTools.PeerMap

Contents

Type definitions
Initialization functions
Basic operations

Description

Module abstracting the peer map implementation.

This is abstracted separately since the speed of peermap updates can be a significant part of the total runtime, and as such changing the implementation should be easy in case it's needed.

Synopsis

Type definitions

type Key = Ndx Source

Our key type.

type Elem = IntSource

Our element type.

type PeerMap = [(Key, Elem)]Source

The definition of a peer map.

Initialization functions

empty :: PeerMap Source

Create a new empty map.

pmCompare :: (Key, Elem) -> (Key, Elem) -> OrderingSource

addWith :: (Elem -> Elem -> Elem) -> Key -> Elem -> PeerMap -> PeerMap Source

accumArray Source

Arguments

:: (Elem -> Elem -> Elem)	function used to merge the elements
-> [(Key, Elem)]	source data
-> PeerMap	results

Create a PeerMap from an association list, with possible duplicates.

Basic operations

find :: Key -> PeerMap -> Elem Source

Returns either the value for a key or zero if not found.

add :: Key -> Elem -> PeerMap -> PeerMap Source

Add an element to a peermap, overwriting the previous value.

remove :: Key -> PeerMap -> PeerMap Source

Remove an element from a peermap.

maxElem :: PeerMap -> Elem Source

Find the maximum element.

Since this is a sorted list, we just get the value at the head of the list, or zero for a null list

sumElems :: PeerMap -> Elem Source

Sum of all peers.