stm

Software Transactional Memory

Version on this page:	2.4.4.1@rev:1
LTS Haskell 20.23:	2.5.0.2
Stackage Nightly 2023-05-31:	2.5.1.0
Latest on Hackage:	2.5.1.0@rev:1

See all snapshots stm appears in

BSD-3-Clause licensed

Maintained by libraries@haskell.org

This version can be pinned in stack with:stm-2.4.4.1@sha256:49cfd80cba95f84d42eda0045346c8a567df5ce434d4da3d26ac3e977826fc4f,1563

Module documentation for 2.4.4.1

Control
- Control.Concurrent
  - Control.Concurrent.STM
- Control.Monad
  - Control.Monad.STM

Depends on 2 packages(full list with versions):

Used by 126 packages in lts-7.24(full list with versions):

A modular composable concurrency abstraction.

Changes

Changelog for `stm` package

2.4.4.1 Dec 2015

Add support for base-4.9.0.0
Drop support for GHC 6.12 / base-4.2

2.4.4 Dec 2014

Add support for base-4.8.0.0
Tighten Safe Haskell bounds
Add mkWeakTMVar to Control.Concurrent.STM.TMVar
Add @since-annotations

2.4.3 Mar 2014

Update behaviour of newBroadcastTChanIO to match newBroadcastTChan in causing an error on a read from the broadcast channel
Add mkWeakTVar
Add isFullTBQueue
Fix TChan created via newBroadcastTChanIO to throw same exception on a readTChan as when created via newBroadcastTChan
Update to Cabal 1.10 format

2.4.2 Nov 2012

Add Control.Concurrent.STM.TSem (transactional semaphore)
Add Applicative/Alternative instances of STM for GHC <7.0
Throw proper exception when readTChan called on a broadcast TChan

2.4 Jul 2012

Add Control.Concurrent.STM.TQueue (a faster TChan)
Add Control.Concurrent.STM.TBQueue (a bounded channel based on TQueue)
Add Eq instance for TChan
Add newBroadcastTChan and newBroadcastTChanIO
Some performance improvements for TChan
Add cloneTChan