I recently ran into this issue too, this would be a nice change! On Wed, Nov 1, 2017, at 10:53, Andrew Martin wrote:
ThreadId has a Show instance that makes uses the FFI to turn a ThreadId to a CInt:
instance Show ThreadId where showsPrec d t = showString "ThreadId " . showsPrec d (getThreadId (id2TSO t))
foreign import ccall unsafe "rts_getThreadId" getThreadId :: ThreadId# -> CInt
Can getThreadId be exported? This would make it possible to write a Hashable instance for ThreadId, and it would make it possible to use a ThreadId to index into an array (with modulus of course).
-Andrew Thaddeus Martin _______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries