hGetContents and threadWaitRead?

[MR K P SCHUPKE]

Whilst everyone is discussing threads, does anybody know if hGetContents
is well behaved
with respect to threads - ie does it use threadWaitRead internally? I
know it uses unsafePerfomIO,
is a function that interleaves IO using unsafePerformIO automatically
haskell-thread safe? - also
do I need to use threadWaitWrite before any hPut - or do the hPut
functions do this internally?

    Regards,
    Keean Schupke.