[Haskell-cafe] ANN: uuid-0.1.2

[Antoine Latter]

2010/1/5 Mark Lentczner <markl at glyphic.com>:
> Antione and I are please to announce the release of uuid-0.1.2.
>
> CHANGES:
> - added functions toByteString and fromByteString
> - added 'nil' UUID
> - added unit tests and benchmarks, built when configured -ftest
> - major speed up of to/from functions (as well as in general)
> - added version-3 generation (deterministic based on MD5)
> - major changes to internal representation
>        - now uses four strict Word32 values
>        - internal ByteSource classes for easy construction (see Builder.hs)
> - Storable instance now stores in memory as system libraries in C do:
>    16 bytes derived from the network order of the fields, no matter what
>    the host native endianess is.
> - fixed bugs in V1 time and clock stepping, and V1 generated values
> - builds cleanly under GHC's -Wall
> - added CHANGES file
>

I'd like to announce a point-release to the UUID library: version 1.2.1

The uuid package includes an implementation of UUID generation via the
current time, machine MAC address, and persistent state kept in the
library.

Previously this state was kept using a top-level IORef, and if you hit
it too quickly with the threaded run-time it would return duplicate
UUIDs.

Now the internal state is stored in an MVar. This does have additional
run-time overhead, but such is the price of correctness.

Thanks to Neil Mitchell for the bug report and test-case.

Antoine