waldmann at imn.htwk-leipzig.de
Thu May 17 10:38:53 EDT 2007
according to documentation of System.Process.terminateProcess,
"This function should not be used under normal circumstances."
Well, then what function then *should* be used normally?
I have the following code in a multithreaded Haskell program,
which does not work (if this thread is killed,
the external process keeps running after the Haskell program exits)
( System.Process.runCommand cmd )
( terminateProcess p )
( polling_waitForProcess )
It took me a while to figure out why "waitForProcess" here
does not work: Control.Concurrent.throwTo says
"If the target thread is currently making a foreign call, then the
exception will not be raised (and hence throwTo will not return
until the call has completed.") That's why I defined
let polling_waitForProcess p = do
me <- getProcessExitCode p
case me of
Just e -> return ()
Nothing -> do
threadDelay ( 10^5 )
any hints appreciated, J.W.
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