Serializable closures for distributed programming. https://github.com/tweag/distributed-closure

Version on this page:0.4.0
LTS Haskell 15.13:
Stackage Nightly 2020-05-26:
Latest on Hackage:

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BSD-3-Clause licensed by Mathieu Boespflug
Maintained by [email protected]

Module documentation for 0.4.0

This version can be pinned in stack with:[email protected]:a51270513a7bd48edd656309b381681f9d8fd9ab2d5bd47a27f38b75810c174a,1815


Build Status

Leverage the -XStaticPointers extension from GHC 7.10 onwards for distributed programming using lightweight serializable closures. This package implements a serializable closure abstraction on top of static pointers. Serializable closures can be shipped around a computer cluster. This is useful for implementing intuitive and modular distributed applications. See this blog post for a hands on introduction and this paper for the original motivation.


In GHC 8 and above, remoting a computation on another node using this library goes along the lines of

data NodeId

-- Assume we're given a spaw primitive.
spawn :: NodeId -> Closure (IO ()) -> IO ()

-- A computation to remote on another node.
hello :: String -> IO ()
hello name = putStrLn ("Hello, " ++ name)

main = do
  name <- getLine
  spawn "someAddress" (static hello `cap` name)

distributed-closure does not implement sending/receiving/spawning closures - that’s left for higher-level frameworks. Only closure creation, composition and (de)serialization.