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| -rw-r--r-- | gnu/packages/haskell-xyz.scm | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm index 2977398880..e134641de4 100644 --- a/gnu/packages/haskell-xyz.scm +++ b/gnu/packages/haskell-xyz.scm @@ -21,6 +21,7 @@ ;;; Copyright © 2019 Jacob MacDonald <jaccarmac@gmail.com> ;;; Copyright © 2019 John Soo <jsoo1@asu.edu> ;;; Copyright © 2019 Kyle Meyer <kyle@kyleam.com> +;;; Copyright © 2019 Alex Griffin <a@ajgrf.com> ;;; ;;; This file is part of GNU Guix. ;;; @@ -381,6 +382,28 @@ over threads in Haskell, in which @code{Async a} is a concurrent thread that will eventually deliver a value of type @code{a}.") (license license:bsd-3))) +(define-public ghc-atomic-primops + (package + (name "ghc-atomic-primops") + (version "0.8.2") + (source + (origin + (method url-fetch) + (uri (string-append "https://hackage.haskell.org/package/atomic-primops" + "/atomic-primops-" version ".tar.gz")) + (sha256 + (base32 + "0cyr2x6xqz6s233znrz9rnrfj56m9bmnawwnka0lsqqy1hp8gy37")))) + (build-system haskell-build-system) + (inputs `(("ghc-primitive" ,ghc-primitive))) + (home-page "https://github.com/rrnewton/haskell-lockfree/wiki") + (synopsis "Safe approach to CAS and other atomic ops") + (description + "GHC 7.4 introduced a new @code{casMutVar} PrimOp which is difficult to +use safely, because pointer equality is a highly unstable property in Haskell. +This library provides a safer method based on the concept of @code{Ticket}s.") + (license license:bsd-3))) + (define-public ghc-atomic-write (package (name "ghc-atomic-write") |