barrucadu/dejafu
1
1
Fork 0
mirror of https://github.com/barrucadu/dejafu.git synced 2025-01-08 06:47:22 +03:00
Code Issues Projects Releases Wiki Activity

Remvoe Par comparison from MonadConc description

Browse Source
This commit is contained in:
Michael Walker 2015-11-15 15:42:37 +00:00
parent b1ee473068
commit 385d67a842
1 changed files with 0 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
dejafu/Control/Monad/Conc/Class.hs
View File

@ -53,18 +53,6 @@ import Data.Monoid (Monoid, mempty)
-- terms of how they can operate on shared state and in the presence -- terms of how they can operate on shared state and in the presence
-- of exceptions. -- of exceptions.
-- --
-- There are a few notable differences between this and the @Par@
-- monad approach: firstly, @Par@ imposes 'NFData' constraints on
-- everything, as it achieves its speed-up by forcing evaluation in
-- separate threads. @MonadConc@ doesn't do that, and so you need to
-- be careful about where evaluation occurs, just like with
-- 'MVar's. Secondly, this builds on @Par@'s futures by allowing
-- @CVar@s which threads can read from and write to, possibly multiple
-- times, whereas with the @Par@ monads it is illegal to write
-- multiple times to the same @IVar@ (or to non-blockingly read from
-- it) which, when there are no exceptions, removes the possibility of
-- data races.
--
-- Every @MonadConc@ has an associated 'MonadSTM', transactions of -- Every @MonadConc@ has an associated 'MonadSTM', transactions of
-- which can be run atomically. -- which can be run atomically.
class ( Applicative m, Monad m class ( Applicative m, Monad m