GHC.IO.Device and "ready" method?

Hi, Should an implementation of GHC.IO.Device expect the `ready' method to be called from a thread different than one waiting for an I/O operation on a handle to complete, while that operation is in progress? As a more general question, are GHC Handles (and underlying implementations of GHC.IO.Device and GHC.IO.BufferedIO) expected to be thread-safe? I would be happy to store the id of the thread that calls mkFileHandle somewhere in the underlying `dev' and simply reject all I/O requests that come from other threads, but is this correct/permitted behavior? Thanks. -- Dimitry Golubovsky Anywhere on the Web