stm-io-hooks: An STM monad with IO hooks

[ bsd3, concurrency, library ] [ Propose Tags ]

This library provides an STM monad with commit and retry IO hooks. A retry-action is run (once) if the transaction retries, while commit-actions are executed iff the transaction commits. The library also gives some atomicity guarantees for commit-actions:

  • When a TVar is modified in a transaction and this transaction commits, the update remains invisible to other threads until the corresponding onCommit action is run.

  • If the onCommit action throws an exception, the original values of the modified TVars are restored.

Note: Part of this library uses code from the Haskell Wiki (see


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Versions [RSS] 0.0.1, 0.1.0, 0.2.0, 0.2.1, 0.3.0, 0.4.2, 0.5.4, 0.6.0, 0.7.0, 0.7.1, 0.7.2, 0.7.3, 0.7.5, 1.0.0, 1.0.1, 1.1.0, 1.1.1, 1.1.2
Dependencies array, base (>=, containers (>=, mtl (>=, stm (>= [details]
License BSD-3-Clause
Author Peter Robinson 2009, Chris Kuklewicz 2006
Maintainer Peter Robinson <>
Category Concurrency
Uploaded by PeterRobinson at 2009-01-28T14:27:19Z
Distributions NixOS:1.1.2
Reverse Dependencies 3 direct, 0 indirect [details]
Downloads 12900 total (3 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by Bayesian average]
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Status Docs uploaded by user
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