I don't think what you want is possible if both sides are in STM. Other authors have posted solutions where one side or the other of the transaction is in I/O, but wholly inside STM it's not possible.
The problem is that in order for synchronization to happen, you need both sides to be able to communicate with each other. But the whole point of STM is that each transaction is atomically isolated from other transactions running concurrently; you can find out what transactions that committed before you have done, but there is no way for you to interact with another transaction in-flight. -- ryan On Wed, Oct 8, 2008 at 11:10 PM, roger peppe <[EMAIL PROTECTED]> wrote: > I was wondering if it was possible to implement synchronous channels > within STM. In particular, I'd like to have CSP-like send and recv primitives > on a channel that each block until the other side arrives to complete > the transaction. > > I think I've convinced myself that it's not possible, but > anyone care to differ? > > cheers, > rog. > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
