On 14/09/10 07:45, Arnaud Bailly wrote:
What surprised me is that I would expect the behaviour of the two functions to be different: - in doRunMvnInIO, I would expect stdout's content to be printed before stderr, ie. the 2 threads are ordered because I call takeMVar in between calls to forkIO - in doRunMvnInIO', this is not true and both theads run concurrently.
but actually there does not seem to be a difference: printing is still interleaved in both functions, AFAICT.
Hi, I've tried your code (substituting a program that spits out different streams of numbers on stdout and stderr for maven), and I see the behaviour you had expected: the first version does print all of stdout before stderr, whereas the second version shows interleaving of the two streams. Are you certain that you are seeing interleaving in the first version? Thanks, Neil.