Name:                atomic-primops
Version:             0.2.2.1
x-revision: 1
License:             BSD3
License-file:        LICENSE
Author:              Ryan Newton
Maintainer:          rrnewton@gmail.com
Category:            Data
Stability:           Provisional
-- Portability:         non-portabile (x86_64)
Build-type:          Custom
-- TODO: This requirement needs to be bumped to 1.17 when the latest cabal is
-- released.  This package triggers issue #1284:
Cabal-version:       >=1.8
HomePage: https://github.com/rrnewton/haskell-lockfree-queue/wiki

-- Version History:
-- 0.1.0.0 -- initial release
-- 0.1.0.2 -- disable profiling
-- 0.2 -- Critical bugfix and add Counter.
-- 0.2.2 -- Add more counters
-- 0.2.2.1 -- Minor, add warning.

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

Description:

  WARNING: Your program MUST be built with "ghc -threaded" if you depend on this library.
           The library depends on threaded Haskell RTS, which is only conditionally linked.
           If you don't do this you will see an error at link time about "cas" being missing.
  . 
  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.

Extra-Source-Files:  DEVLOG.md,
                     testing/runTest.hs, testing/Test.hs, testing/test-atomic-primops.cabal
--                    Makefile, Test.hs, README.md

Flag debug
    Description: Enable extra internal checks.
    Default: False

Library
  exposed-modules:   Data.Atomics
                     Data.Atomics.Internal
                     Data.Atomics.Counter
                     Data.Atomics.Counter.IORef
                     Data.Atomics.Counter.Reference
                     Data.Atomics.Counter.Foreign
  ghc-options: -O2 -funbox-strict-fields

  -- casMutVar# had a bug in GHC 7.2, thus we require GHC 7.4 or greater
  -- (base 4.5 or greater). We also need the "Any" kind.
  build-depends:     base >= 4.6.0.0 && < 4.7, ghc-prim, primitive, Cabal,
                     bits-atomic

  -- TODO: Try to push support back to 7.0:
  -- Ah, but if we don't USE casMutVar# in this package we are ok:
  -- build-depends:     base >= 4.3, ghc-prim, primitive

  Include-Dirs:     cbits
  C-Sources:        cbits/primops.cmm
  CC-Options:       -Wall
  ghc-prof-options: -DGHC_PROFILING_ON
  -- if( cabal-version < 1.17 ) {
  --   ghc-prof-options: ERROR_DO_NOT_BUILD_THIS_WITH_PROFILING_YET__SEE_CABAL_ISSUE_1284
  -- }

  if flag(debug)
    cpp-options: -DDEBUG_ATOMICS

-- -- [2013.04.08] This isn't working presently:
-- -- I'm having problems with building it along with the library; see DEVLOG.
-- -- Switching to a separate package in ./testing/ 
-- Test-Suite test-atomic-primops
--     type:       exitcode-stdio-1.0


Source-Repository head
    Type:         git
    Location:     git://github.com/rrnewton/haskell-lockfree-queue.git