Transactional variables and data structures with IO hooks http://darcs.monoid.at/tbox
|Latest on Hackage:||0.1.0|
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This package provides STM data structures with IO hooks.
The basic building blocks are instances of class
TBox. Such an
instance is an STM variable that might contain a value of
a. In contrast to a plain 'TVar (Maybe a)', a
TBox has IO hooks that are executed transparently on writes and reads.
The IO hooks of the
AdvSTM monad extend the atomicity of STM transactions
to the on-commit IO actions, which makes it particularly suitable for
implementing a persistent and thread-safe storage.
See module Control.Concurrent.TFile for a (simple) instance of a
that serializes its content to a file via
New in this release is the implementation of a skip list in module
Control.Concurrent.TBox.TSkipList. A skip list is a probabilistic data
structure that provides expected run time of O(log n) for
dictionary operations (insert, lookup, filter, delete, update) similar to
a balanced tree.
The main advantage of a skip list is that it does not need rebalancing,
which could cause lots of contention among transactions.
TFile skip list instance tries to reconstruct its content from the
TFile-directory. See module Control.Concurrent.TFile.TSkipList for a
Feedback is highly appreciated!