> I am using the library oncurrent of GHC. I'd like to know how two
> different threads can communicate each other.
> To solve the problem I thought in something like a global variable. If
> there any method to avoid the use of that kind of variables
> in haskell.
You can use the various concurrent data structures in the Concurrent
library. See:
http://www.haskell.org/ghc/docs/latest/set/sec-concurrency-abstractions.
html
The simplest form of communication is through an MVar, which is a
thread-safe mutable variable.
Cheers,
Simon
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