abstract-deque

Abstract, parameterized interface to mutable Deques.

https://github.com/rrnewton/haskell-lockfree/wiki

LTS Haskell 24.17:	0.3
Stackage Nightly 2025-10-31:	0.3
Latest on Hackage:	0.3

See all snapshots abstract-deque appears in

BSD-3-Clause licensed by Ryan R. Newton

Maintained by [email protected]

This version can be pinned in stack with:abstract-deque-0.3@sha256:308bff92bb8b6621ed1dae718e859da145c8f31b8a9050aeacac40a8a21c9c90,2565

Module documentation for 0.3

Data
- Data.Concurrent
  - Data.Concurrent.Deque

Depends on 5 packages(full list with versions):

array, base, containers, random, time

Used by 3 packages in nightly-2025-10-31(full list with versions):

abstract-deque-tests, lockfree-queue, monad-par

An abstract interface to highly-parameterizable queues/deques.

Background: There exists a feature space for queues that extends between:

simple, single-ended, non-concurrent, bounded queues
double-ended, threadsafe, growable queues

... with important points inbetween (such as the queues used for work-stealing).

This package includes an interface for Deques that allows the programmer to use a single API for all of the above, while using the type-system to select an efficient implementation given the requirements (using type families).

This package also includes a simple reference implementation based on IORef and Data.Sequence.