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

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:

• Major internal change. Duplicate the barrier code from the GHC RTS and thus enable support for executables that are NOT built with '-threaded'.

Changes in 0.4:

• Further internal changes, duplicate cas routine well as barriers.

• Add fetchAddByteArrayInt

• Add an Unboxed counter variant that uses movable ByteArray s on the GHC heap.

Changes in 0.5:

• Remove dependency on bits-atomic unless a flag is turned on.

Modules

[Index]

Flags

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

Downloads

• atomic-primops-0.5.tar.gz [browse] (Cabal source package)
• Package description (revised from the package)

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'.

Maintainer's Corner

Package maintainers

• BrandonSimmons, GregoryCollins, RyanNewton, ryanglscott, peter_fogg, chchen

For package maintainers and hackage trustees

• edit package information

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