[Haskell-cafe] Re: What does the withProcessHandle_ function do?

John Ky wrote:

I want to learn how to use FFI with Win32, so I'm looking through the GHC source code. I encountered the function

terminateProcess :: ProcessHandle -> IO () terminateProcess ph = do withProcessHandle_ ph $ \p_ -> case p_ of ClosedHandle _ -> return p_ OpenHandle h -> do throwErrnoIfMinus1_ "terminateProcess" $ c_terminateProcess h return p_

which uses withProcessHandle_. What does it do?

withProcessHandle_ is defined in System.Process.Internals. http://darcs.haskell.org/packages/base/System/Process/Internals.hs Cheers, Simon