atomic-primops: A safe approach to CAS and other atomic ops in Haskell.

[ bsd3, data, library ] [ Propose Tags ]
Versions,, 0.2.2,, 0.3, 0.4, 0.5,, 0.6,,, 0.6.1,, 0.7, 0.8,,,, 0.8.1,, 0.8.2 (info)
Dependencies base (>= && <4.7), bits‑atomic, Cabal, ghc‑prim, primitive [details]
License BSD-3-Clause
Author Ryan Newton
Revised Revision 1 made by AdamBergmark at Fri Jul 3 19:50:15 UTC 2015
Category Data
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Source repo head: git clone git://
Uploaded by RyanNewton at Fri Jul 19 15:47:35 UTC 2013
Distributions FreeBSD:0.8, LTSHaskell:0.8.2, NixOS:0.8.2, Stackage:0.8.2, openSUSE:
Downloads 13370 total (152 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by rule of succession]
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Status Docs uploaded by user [build log]
All reported builds failed [all 1 reports]
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After GHC 7.4 a new casMutVar# primop became available, but it's 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 Tickets.

Also, this library uses the "foreign primop" capability of GHC to add access to other variants that may be of interest, specifically, compare and swap inside an array.

Changes in 0.3:

Changes in 0.4:





Enable extra internal checks.


Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info


Note: This package has metadata revisions in the cabal description newer than included in the tarball. To unpack the package including the revisions, use 'cabal get'.

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