If there some concern a ThreadId could be bigger than an Int
somewhere/somewhen? Should it be Int64? Or could it be variable size,
suggesting whatever it is that backs SmallByteString?
On Nov 1, 2017 10:54 AM, "Andrew Martin"
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
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