It seems that it is necessary to state that these three functions all
execute in the same thread. I don't want to write C wrappers for all Gtk
functions!
Yes, that's what the current "bound threads" proposal is all about, to allow a Haskell thread to be "bound" to a specific OS thread so that all three functions are guaranteed to execute in the same thread.
I think that GHC probably won't ship with the "threaded RTS" enabled before this or an equivalent proposal has been accepted and implemented.
Without the threaded RTS (e.g. GHC 5.04), OS threads are a non-issue, as all Haskell code runs in one OS thread.
So no need to worry there.
Cheers,
Wolfgang
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